LRFD Design Example #1:


 Anthony O’Neal’
 3 years ago
 Views:
Transcription
1 LRFD Design Example #1: Prestressed Precast Concrete Beam Bridge Design Click here for Table of Contents
2 LRFD DESIGN EXAMPLE: PRESTRESSED PRECAST CONCRETE BEAM BRIDGE DESIGN Table of Contents Cover Section 1: Project Information 1.01 About this Design Example 1.0 General Notes 1.03 Design Parameters Section : Superstructure Design.01 Dead Loads.0 Live Load Distribution Factors.03 Live Load Analysis.04 Prestressed Beam Design  Part I.05 Prestressed Beam Design  Part II.06 Traditional Deck Design.07 Deck Overhang Design.08 Creep and Shrinkage Parameters.09 Expansion Joint Design.10 Composite Neoprene Bearing Pad Design.11 Beam Stability Section 3: Substructure Design 3.01 Dead Loads 3.0 Pier Cap Live Load Analysis 3.03 Pier Cap Design Loads 3.04 Pier Cap Design 3.05 Pier Column Design Loads 3.06 Pier Column Design 3.07 Pier Foundation Design Loads 3.08 Pier Pile Vertical Load Design 3.09 Pier Footing Design 3.10 End Bent Live Load Analysis 3.11 End Bent Design Loads 3.1 End Bent Cap Design (similar to Section 3.04) 3.13 End Bent Foundation Design Loads 3.14 End Bent Pile Vertical Load Design (similar to Section 3.08) 3.15 End Bent Backwall Design LRFD Design Example Table of Contents i
3 SUPERSTRUCTURE DESIGN About this Design Example Description This document provides guidance for the design of a precast, prestressed beam bridge utilizing the AASHTO LRFD Bridge Design Specifications. The example includes the following component designs: Traditional deck design Prestressed beam design Composite Neoprene bearing pad design Multicolumn pier design End bent design The following assumptions have been incorporated in the example: Two simple 90'0" each, 0 degree skew. Minor horizontal curvature Multicolumn pier on prestressed concrete piles. No phased construction. Two traffic railing barriers and one median barrier. No sidewalks. Permit vehicles are not considered. Design for jacking is not considered. Load rating is not addressed. No utilities on the bridge. For purposes of wind load calculation, the bridge is located in an area with a basic wind speed of 150 mph. Since this example is presented in a Mathcad document, a user can alter assumptions, constants, or equations to create a customized application. PROJECT INFORMATION 1.01 About this Design Example 1
4 Standards The example utilizes the following design standards: Florida Department of Transportation Standard Specifications for Road and Bridge Construction (010 edition) and applicable modifications. AASHTO LRFD Bridge Design Specifications, 5th Edition, 010. Florida Department of Transportation Structures Design Guidelines, January 011 Edition. Florida Department of Transportation Structures Detailing Manual, January 011 Edition. Florida Department of Transportation Design Standards, 010 Interim Edition. Acknowlegements The Tampa office of HDR Engineering, Inc. prepared this document for the Florida Department of Transportation. The Structures Design Office of the Florida Department of Transportation updated the example in 011. Notice The materials in this document are only for general information purposes. This document is not a substitute for competent professional assistance. Anyone using this material does so at his or her own risk and assumes any resulting liability. PROJECT INFORMATION 1.01 About this Design Example
5 PROJECT INFORMATION General Notes Design Method... Load and Resistance Factor Design (LRFD) except that the Prestressed Beams and Prestressed Piles have been designed for Service Load. Earthquake... No seismic analysis required (SDG.3.1). Must meet minimum support length requirement (LRFD ). Concrete... Class Minimum 8day Compressive Strength (psi) Location II f`c = 3400 Traffic Barriers II (Bridge Deck) f`c = 4500 CIP Bridge Deck IV f`c = 5500 CIP Substructure V (Special) f`c = 6000 Concrete Piling VI f`c = 8500 Prestressed Beams Environment... The superstructure is classified as slightly aggressive. The substructure is classfied as moderately aggressive. Reinforcing Steel... ASTM A615, Grade 60 Concrete Cover... Superstructure Top deck surfaces.5" (Long bridge) All other surfaces " Substructure External surfaces not in contact with water 3" External surfaces cast against earth 4" Prestressed Piling 3" Top of Girder Pedestals " Concrete cover does not include reinforcement placement or fabrication tolerances, unless shown as "minimum cover". See FDOT Standard Specifications for allowable reinforcement placement tolerances. Assumed Loads... Item Load Live Load HL93 Traffic Railing (plf) 40 Wearing Surface (psf) 0 Utilities (plf) 0 StayInPlace Metal Forms (psf) 0 Median Traffic Railing (plf) 485 Bridge Deck Sacrificial Thickness (in) 0.5 Dimensions... All dimensions are in feet or inches, except as noted. PROJECT INFORMATION 1.0 General Notes 3
6 PROJECT INFORMATION Design Parameters Description This section provides the design input parameters necessary for the superstructure and substructure design. Page Contents 5 A. General Criteria A1. Bridge Geometry A. Number of Lanes A3. Concrete, Reinforcing and Prestressing Steel Properties 9 B. LRFD Criteria B1. Dynamic Load Allowance [LRFD 3.6.] B. Resistance Factors [LRFD ] B3. Limit States [LRFD 1.3.] 1 C. Florida DOT Criteria C1. Chapter 1  General requirements C. Chapter  Loads and Load Factors C3. Chapter 4  Superstructure Concrete C4. Chapter 6  Superstructure Components C5. Miscellaneous 1 D. Substructure D1. End Bent Geometry D. Pier Geometry D3. Footing Geometry D4. Pile Geometry D5. Approach Slab Geometry D6. Soil Properties PROJECT INFORMATION 1.03 Design Parameters 4
7 A. General Criteria This section provides the general layout and input parameters for the bridge example. A1. Bridge Geometry Horizontal Profile A slight horizontal curvature is shown in the plan view. This curvature is used to illustrate centrifugal forces in the substructure design. For all other component designs, the horizontal curvature will be taken as zero. PROJECT INFORMATION 1.03 Design Parameters 5
8 In addition, the bridge is also on a skew which is defined as Skew 0deg Vertical Profile PROJECT INFORMATION 1.03 Design Parameters 6
9 Overall bridge length... L bridge 180ft Bridge design span length... L span 90ft Beam grade... Beam Grade.15% Height of superstructure... z sup 0.5ft Height of substructure... z sub 8.5ft Typical Crosssecton Superstructure Beam Type... BeamType "FIB36" Number of beams... N beams 9 Beam Spacing... BeamSpacing 10ft Deck overhang at End Bent and Pier... Overhang 4ft 6.5in 4.54 ft Average buildup... h buildup 1in PROJECT INFORMATION 1.03 Design Parameters 7
10 A. Number of Lanes Design Lanes [LRFD ] Current lane configurations show two striped lanes per roadway with a traffic median barrier separating the roadways. Using the roadway clear width between barriers, Rdwy width, the number of design traffic lanes per roadway, N lanes, can be calculated as: Roadway clear width... Rdwy width 4ft Number of design traffic lanes Rdwy width per roadway... N lanes floor 3 1ft Substructure Design In order to maximize the design loads of the substructure components, e.g. pier cap negative moment, pier columns, footing loads, etc., HL93 vehicle loads were placed on the deck. In some cases, the placement of the loads ignored the location of the median traffic barrier. This assumption is considered to be conservative. Braking forces The bridge is NOT expected to become onedirectional in the future. Future widening is expected to occur to the outside if additional capacity is needed. Therefore, for braking force calculations, N lanes 3. The designer utilized engineering judgement to ignore the location of the median barrier for live load placement for the substructure design and NOT ignore the median barrier for braking forces. The designer feels that the probability exists that the combination of lanes loaded on either side of the median barrier exists. However, this same approach was not used for the braking forces since these loaded lanes at either side of the median traffic barrier will NOT be braking in the same direction. A3. Concrete, Reinforcing and Prestressing Steel Properties Unit weight of concrete... γ conc 150pcf Modulus of elasticity for reinforcing steel... E s 9000ksi Ultimate tensile strength for prestressing tendon... f pu 70ksi Modulus of elasticity for prestressing tendon... E p 8500ksi PROJECT INFORMATION 1.03 Design Parameters 8
11 B. LRFD Criteria The bridge components are designed in accordance with the following LRFD design criteria: B1. Dynamic Load Allowance [LRFD 3.6.] An impact factor will be applied to the static load of the design truck or tandem, except for centrifugal and braking forces. Impact factor for fatigue and 15 fracture limit states... IM fatigue Impact factor for all other limit 33 states... IM B. Resistance Factors [LRFD ] Flexure and tension of reinforced concrete... ϕ 0.9 Flexure and tension of prestressed concrete... ϕ' 1.00 Shear and torsion of normal weight concrete... ϕ v 0.90 B3. Limit States [LRFD 1.3.] The LRFD defines a limit state as a condition beyond which the bridge or component ceases to satisfy the provisions for which it was designed. There are four limit states prescribed by LRFD. These are as follows: STRENGTH LIMIT STATES Load combinations which ensure that strength and stability, both local and global, are provided to resist the specified statistically significant load combinations that a bridge is expected to experience in its design life. Extensive distress and structural damage may occur under strength limit state, but overall structural integrity is expected to be maintained. EXTREME EVENT LIMIT STATES Load combinations which ensure the structural survival of a bridge during a major earthquake or flood, or when collided by a vessel, vehicle, or ice flow, possibly under scoured conditions. Extreme event limit states are considered to be unique occurrences whose return period may be significantly greater than the design life of the bridge. SERVICE LIMIT STATES Load combinations which place restrictions on stress, deformation, and crack width under regular service conditions. FATIGUE LIMIT STATES Load combinations which place restrictions on stress range as a result of a single design truck occurring at the number of expected stress range cycles. It is intended to limit crack growth under repetitive loads to prevent fracture during the design life of the bridge. PROJECT INFORMATION 1.03 Design Parameters 9
12 Table Load Combinations and Load Factors Revisions to LRFD Table above per SDG: 1. SDG.1.1 states: In LRFD Table , under Load Combination: LL, IM, etc., Limit State: Extreme Event I, use γ eq Per SDG.4.1B: PROJECT INFORMATION 1.03 Design Parameters 10
13 Table Load factors for permanent loads, γ p The load factor for wind in Strength Load Combination III in construction is 1.5 [LRFD ]. PROJECT INFORMATION 1.03 Design Parameters 11
14 C. FDOT Criteria C1. Chapter 1  General Requirements General [SDG 1.1] The design life for bridge structures is 75 years. Criteria for Deflection and SpantoDepth Ratios [SDG 1.] Per SDG 1., either LRFD or should be met. Based on the superstructure depth; is not met, so should be met. The deflection limit is span/800 for vehicular load and span/300 on cantilever arms. Environmental Classifications [SDG 1.3] The environment can be classified as either "Slightly", "Moderately" or "Extremely" aggressive. Per 1.0 General Notes: Environmental classification for superstructure... Environment super "Slightly" Environmental classification for substructure... Environment sub "Moderately" Concrete and Environment [SDG 1.4] The concrete cover for each bridge component is based on either the environmental classification or the length of bridge [SDG 1.4]. Concrete cover for the deck.. cover deck in if L bridge 100ft.5in [SDG 4..1].5in otherwise Concrete cover for substructure not in contact with water... cover sub 4in if Environment sub = "Extremely" 3in 3in otherwise Concrete cover for substructure cast against earth or in contact with water... cover sub.earth 4.5in if Environment sub = "Extremely" 4in 4in otherwise PROJECT INFORMATION 1.03 Design Parameters 1
15 Minimum 8day compressive strength of concrete components... Class Location Correction factor for Florida lime rock coarse aggregate... K II (Bridge Deck) CIP Bridge Deck Approach Slabs f c.slab 4.5ksi IV CIP Substructure f c.sub 5.5ksi V (Special) Concrete Piling f c.pile 6.0ksi VI Prestressed Beams f c.beam 8.5ksi Unit Weight of Florida lime rock concrete (kcf)... w c.limerock.145 kip ft 3 Modulus of elasticity for 1.5 w c.limerock slab... E c.slab 33000K 1 kip ft 3 f c.slab ksi 3479ksi Modulus of elasticity for 1.5 w c.limerock beam... E c.beam 33000K 1 kip ft 3 Modulus of elasticity for 1.5 w c.limerock substructure... E c.sub 33000K 1 kip ft 3 Modulus of elasticity for 1.5 w c.limerock piles... E c.pile 33000K 1 kip ft 3 C. Chapter  Loads and Load Factors Dead loads [SDG.] f c.beam ksi f c.sub ksi f c.pile ksi 4781ksi 3846ksi 4017ksi Weight of future wearing surface... ρ fws 15psf if L bridge 100ft 0psf [SDG 4..1] 0psf otherwise Weight of sacrificial milling surface, using t mill 0.5in.... ρ mill t mill γ conc 6.5psf [SDG 4...A] PROJECT INFORMATION 1.03 Design Parameters 13
16 Table. 1 Miscellaneous Dead Loads ITEM UNIT LOAD General Concrete, Counterweight (Plain) Lb/cf 145 Concrete, Structural Lb/cf 150 Future Wearing Surface Lb/sf 15 1 Soil; Compacted Lb/cf 115 Stay in Place Metal Forms Lb/sf 0 Traffic Railings 3" F Shape (Index 40) Lb/ft 40 Median, 3" F Shape (Index 41) Lb/ft 485 4" Vertical Shape (Index 4) Lb/ft 590 3" Vertical Shape (Index 43) Lb/ft 385 4" F Shape (Index 45) Lb/ft 65 Corral Shape (Index 44) Lb/ft 460 Thrie Beam Retrofit (Index 471, 475 & 476) Lb/ft 40 Thrie Beam Retrofit (Index 47, 473 & 474) Lb/ft 30 Vertical Face Retrofit with 8" curb height (Index ) Lb/ft 70 Traffic Railing/Sound Barrier (8' 0") (Index 510) Lb/ft 1010 Prestressed Beams 3 Florida I 36 Beam (Index 0036) Lb/ft Future Wearing Surface allowance applies only to minor widenings of existing bridges originally designed for a Future Wearing Surface, regardless of length (see SDG 7. Widening Classifications and Definitions) or new short bridges (see SDG 4. Bridge Length Definitions).. Unit load of metal forms and concrete required to fill the form flutes. Apply load over the projected plan area of the metal forms. 3. Weight of buildup concrete for camber and cross slope not included. Weight of traffic railing barrier... w barrier.ea 40plf Weight of traffic railing median barrier... w median.bar 485plf Weight of compacted soil... γ soil 115pcf Weight of stayinplace metal forms... ρ forms 0psf PROJECT INFORMATION 1.03 Design Parameters 14
17 Barrier / Railing Distribution for BeamSlab Bridges [SDG.8 & LRFD ] Dead load of barriers applied to the exterior and interior w barrier.ea beams... w barrier N beams 0.093klf For purposes of this design example, all barriers will be equally distributed amongst all the beams comprising the superstructure. Include the dead load of the traffic barriers on the design w median.bar load of the exterior beams... w barrier.exterior w barrier N beams 0.147klf Include the dead load of the traffic barriers on the design w median.bar load of the interior beams... w barrier.interior w barrier N beams 0.147klf Seismic Provisions [SDG.3 & LRFD & ] Seismic provisions for minimum bridge support length only. Wind Loads [SDG.4] Basic wind speed (mph)... V 150 Height, superstructure... z sup 0.5 ft Height, substructure... z sub 8.5 ft Gust effect factor... G 0.85 Pressure coefficient, superstructure... C p.sup 1.1 Pressure coefficient, substructure... C p.sub 1.6 Velocity pressure exposure.105 z sup coefficient, superstructure... K z.sup max ft PROJECT INFORMATION 1.03 Design Parameters 15
18 Velocity pressure exposure.105 z sub coefficient, substructure... K z.sub max ft Wind pressure, superstructure, Strength III, Service IV... P z.sup.striii.serviv K z.sup V GC p.sup Wind pressure, superstructure, Strength V, Service I... P z.sup.strv.servi K z.sup 70 GC p.sup Wind pressure, substructure, Strength III, Service IV... P z.sub.striii.serviv K z.sub V GC p.sub Wind pressure, substructure, Strength V, Service I... P z.sub.strv.servi K z.sub 70 GC p.sub C3. Chapter 4  Superstructure Concrete General [SDG 4.1] Yield strength of reinforcing steel... f y 60ksi Note: Epoxy coated reinforcing not allowed on FDOT projects. Deck Slabs [SDG 4.] Bridge length definition... BridgeType "Short" if L bridge 100ft "Long" "Long" otherwise Thickness of sacrificial milling surface... t mill 0in if L bridge 100ft 0.5in otherwise 0.5in Deck thickness... t slab 8.0in PROJECT INFORMATION 1.03 Design Parameters 16
19 Deck Slab Design [SDG 4..4] The empirical design method is not permitted per SDG 4..4.A. Therefore, the traditional design method will be used. The minimum transverse top slab reinforcing at the median barrier and overhang may be determined using the table in SDG 4..4.B because a minimum 8" slab depth and less than 6' overhang is provided. A minimum area of steel of 0.40 in per foot should be provided in the top of the deck slab at the median barrier, and 0.80 in per foot should be provided at the Fshape barrier. Pretensioned Beams [SDG 4.3] (Note: Compression = +, Tension = ) Minimum compressive concrete strength at release is the greater of 4.0 ksi or 0.6 f c ksi f ci.beam.min max 4ksi0.6f c.beam Maximum compressive concrete strength at release is the lesser of 6.0 ksi or 0.8 f c... 6ksi f ci.beam.max min 0.8f c.beam 6.0ksi Any value between the minimum and maximum may be selected for the design. Compressive concrete strength at release... f ci.beam 6ksi Corresponding modulus of 1.5 w c.limerock elasticity... E ci.beam 33000K 1 kip ft 3 f ci.beam ksi 4017ksi Limits for tension in top of beam at release (straight strand only) [SDG C] Outer 15 percent of design beam... f top.outer15 1 f ci.beam psi 930psi Center 70 percent of design beam [LRFD ] f top.center70 min 0.ksi f ci.beam ksi psi PROJECT INFORMATION 1.03 Design Parameters 17
20 Timedependent variables for creep and shrinkage calculations Relative humidity... H 75 Age (days) of concrete when load is applied... T 0 1 Age (days) of concrete when section becomes composite... T 1 10 Age (days) of concrete used to determine long term losses... T C4. Chapter 6  Superstructure Components Temperature Movement [SDG 6.3] The temperature values for "Concrete Only" in the preceding table apply to this example. Temperature mean... t mean 70 F Temperature high... t high 105 F Temperature low... t low 35 F Temperature rise... Δt rise t high t mean 35 F Temperature fall... Δt fall t mean t low 35 F Coefficient of thermal expansion [LRFD 5.4..] for normal weight concrete... α t F PROJECT INFORMATION 1.03 Design Parameters 18
21 Expansion Joints [SDG 6.4] For new construction, use only the joint types listed in the preceding table. A typical joint for most prestressed beam bridges is the poured joint with backer rod [DS Index 1110]. Maximum joint width... W max 3in Proposed joint width at 70 o F... W 1in Minimum joint width... W min 0.5W Movement [6.4.] For prestressed concrete structures, the movement is based on the greater of the following combinations: Movement from the combination of temperature fall, creep, and shrinkage... Δx fall = Δx temperature.fall (Note: A temperature rise with creep Δx and shrinkage is not investigated since creep.shrinkage they have opposite effects). Temperature Load Factor γ TU 1. Movement from factored effects of temperature... Δx rise = γ TU Δx temperature.rise Δx fall = γ TU Δx temperature.fall (Note: For concrete structures, the temperature rise and fall ranges are the same. PROJECT INFORMATION 1.03 Design Parameters 19
22 C5. Miscellaneous Beam Parameters Distance from centerline pier to centerline bearing... Distance from centerline end bent (FFBW) to centerline bearing... K1 K 11in 16in (Note: Sometimes the K value at the end bent and pier may differ. Distance from end of beam to centerline of bearing... J 8in Beam length... L beam L span ( K1 J) ( K J) ft Beam design length... L design L span K1 K ft PROJECT INFORMATION 1.03 Design Parameters 0
23 D. Substructure D1. End Bent Geometry (Note: End bent back wall not shown) Depth of end bent cap... h EB.5ft Width of end bent cap... b EB 3.5ft Length of end bent cap... L EB 88ft Height of back wall... h BW 3.6ft Back wall design width... L BW 1ft Thickness of back wall... t BW 1in D. Pier Geometry Depth of pier cap... h Cap 4.5ft Column diameter... b Col 4.0ft Width of pier cap... b Cap 4.5ft Number of columns... n Col 4 Length of pier cap... L Cap 88ft Surcharge on top of footing... h Surcharge.0ft Height of pier column... h Col 14.0ft PROJECT INFORMATION 1.03 Design Parameters 1
24 D3. Footing Geometry Depth of footing... h Ftg 4.0ft Width of footing... b Ftg 7.5ft Length of footing... L Ftg 7.5ft D4. Pile Geometry Pile Embedment Depth... Pile embed 1in Pile Size... Pile size 18in D5. Approach Slab Geometry Approach slab thickness... t ApprSlab 13.75in Approach slab length... L ApprSlab 3ft D6. Soil Properties (Note: The min. approach slab dimension due to the 30ft skew is ft ). cos( Skew) Unit weight of soil... γ soil 115pcf Defined Units PROJECT INFORMATION 1.03 Design Parameters
25 SUPERSTRUCTURE DESIGN Dead Loads Reference Reference:C:\Users\st986ch\AAAdata\LRFD PS Beam Design Example\103DesignPar.xmcd(R) Description This section provides the dead loads for design of the bridge components. Page Contents 4 A. NonComposite Section Properties A1. Summary of the properties for the selected beam type A. Effective Flange Width [LRFD ] 6 B. Composite Section Properties B1. Interior beams B. Exterior beams B3. Summary of Properties 9 C. Dead Loads C1. Interior Beams C. Exterior Beams C3. Summary Superstructure Design.01 Dead Loads 3
26 A. NonComposite Section Properties A1. Summary of Properties for the Selected Beam Type BeamTypeTog BeamType PCBeams NONCOMPOSITE PROPERTIES FIB36 FIB45 FIB54 FIB63 FIB7 FIB78 Moment of Inertia [in 4 ] I Section Area [in ] A b ytop [in] y top ybot [in] y bot De pth [in] h Top flange width [in] b tf Top flange depth [in] h tf Width of web [in] b web Bottom flange width [in] b Bottom flange depth [in] h bf Bottom flange taper [in] E output( beampropstype) beamprops 1 if type = "FIB36" beamprops if type = "FIB45" beamprops 3 if type = "FIB54" beamprops 4 if type = "FIB63" beamprops 5 if type = "FIB7" beamprops 6 if type = "FIB78" beamprops 0 00 otherwise Superstructure Design.01 Dead Loads 4
27 FIB in FIB in FIB in FIB in Beamtype FIB36 if BeamType = "FIB36" FIB45 if BeamType = "FIB45" FIB54 if BeamType = "FIB54" FIB63 if BeamType = "FIB63" FIB7 if BeamType = "FIB7" FIB78 if BeamType = "FIB78" I nc A nc output( PCBeamsBeamTypeTog) in 4 0 output( PCBeamsBeamTypeTog) in yt nc output( PCBeamsBeamTypeTog) in output( PCBeamsBeamTypeTog) yb nc h nc output( PCBeamsBeamTypeTog) in 3 output( PCBeamsBeamTypeTog) in b tf h tf output( PCBeamsBeamTypeTog) in 5 output( PCBeamsBeamTypeTog) in b w b bf output( PCBeamsBeamTypeTog) in 7 output( PCBeamsBeamTypeTog) in 8 h bf output( PCBeamsBeamTypeTog) in 9 Jx output( PCBeamsBeamTypeTog) in 4 11 Superstructure Design.01 Dead Loads 5
28 The noncomposite beam properties are given and can be obtained from the FDOT Instructions for Design Standards, Index 0010 Series. NONCOMPOSITE PROPERTIES FIB36 Moment of Inertia [in 4 ] I nc Section Area [in ] A nc 807 ytop [in] yt nc ybot [in] yb nc De pth [in] h nc 36 Top flange width [in] b tf 48 Top flange depth [in] h tf 3.5 Width of web [in] b w 7 Bottom flange width [in] b bf 38 Bottom flange depth [in] h bf 7 Bottom flange taper [in] E 15.5 Section Modulus top [in 3 ] S tnc 6537 Section Modulus bottom [in 3 ] S bnc BeamType "FIB36" A. Effective Flange Width [LRFD ] Interior beams The effective flange width: b eff.interior BeamSpacing 10 ft Exterior beams For exterior beams, the effective flange width: BeamSpacing b eff.exterior = Overhang Δw where: Crosssectional area of the barrier... A b.77ft Δw A b t slab.078 ft BeamSpacing Effective flange width: b eff.exterior Overhang Δw ft Superstructure Design.01 Dead Loads 6
29 Transformed Properties To develop composite section properties, the effective flange width of the slab should be transformed to the concrete properties of the beam. E c.slab n 0.78 Modular ratio between the deck and beam. E c.beam Transformed slab width for interior beams b tr.interior n b eff.interior in Transformed slab width for exterior beams b tr.exterior n b eff.exterior in Superstructure Design.01 Dead Loads 7
30 B. Composite Section Properties B1. Interior beams Height of the composite section... h h nc h buildup t slab 45in Area of the composite section... A slab b tr.interior t slab 698.5in A fillet b tf h buildup 48in A Interior A nc A fillet A slab in Distance from centroid of beam to extreme fiber in tension y b h buildup A nc yb nc A fillet h nc A slab h nc h buildup A Interior t slab 8.1in Distance from centroid of beam to extreme fiber in compression... y t h y b 16.9in Moment of Inertia... 1 I slab 1 b tr.interior t 3 t slab slab A slab h y b in 4 I fillet 3 b tf h buildup 1 I Interior I nc A nc y b yb nc h buildup A fillet h nc y b 3368in 4 I slab I fillet in 4 I Interior Section Modulus (top, top of beam, bottom)... S t 1319in 3 y t S tb I Interior h nc y b 45695in 3 S b I Interior 1787in 3 y b Superstructure Design.01 Dead Loads 8
31 B. Exterior beams Calculations are similar to interior beams. Height of the composite section... h h nc h buildup t slab 45in Area of the composite section... A slab b tr.exterior t slab in A fillet b tf h buildup 48in A Exterior A nc A fillet A slab in Distance from centroid of beam to extreme fiber in tension y' b h buildup A nc yb nc A fillet h nc A slab h nc h buildup A Exterior t slab 9.00in Distance from centroid of beam to extreme fiber in compression... y' t h y' b in Moment of Inertia... 1 I slab 1 b tr.exterior t 3 t slab slab A slab h y' b 11157in 4 I fillet 3 b tf h buildup 1 I Exterior I nc A nc y' b yb nc h buildup A fillet h nc y' b 70in 4 I slab I fillet in 4 I Exterior Section Modulus (top, top of beam, bottom)... S t 361.in 3 y' t S tb I Exterior h nc y' b in 3 S b I Exterior in 3 y' b Superstructure Design.01 Dead Loads 9
32 B3. Summary of Properties COMPOSITE SECTION PROPERTIES INTERIOR EXTERIOR Effective slab width [in] b eff.interior/exterior Transformed slab width [in] b tr.interior/exterior Height of composite section [in] h Effective slab area [in ] A slab Area of composite section [in ] A Interior/Exterior Neutral axis to bottom fiber [in] y b Neutral axis to top fiber [in] y t Inertia of composite section [in 4 ] I Interior/Exterior Section modulus top of slab [in 3 ] S t Section modulus top of beam [in 3 ] S tb Section modulus bottom of beam [in 3 ] S b Superstructure Design.01 Dead Loads 30
33 C. Dead Loads Calculate the moments and shears as a function of "x", where "x" represents any point along the length of the beam from 0 feet to L design. The values for the moment and shear at key design check points are given... where Support 0ft ShearChk 3.ft Debond1 Debond 10ft 0ft {Check beam for debonding, if not debonding, enter 0 ft.) (Check beam for debonding, if not debonding, enter 0 ft.) Midspan 0.5L design ft For convenience in Mathcad, place these points in a matrix... C1. Interior Beams Support ShearChk 0 3. x Debond1 10 ft pt 0 4 Debond 0 Midspan Design Moments and Shears for DC Dead Loads Weight of beam w BeamInt A nc γ conc 0.841klf Moment  selfweight of beam at Release.. Moment  selfweight of beam... Shear  selfweight of beam... M RelBeamInt ( x) M BeamInt ( x) V BeamInt ( x) w BeamInt L beam x w BeamInt L design x w BeamInt L design w BeamInt x w BeamInt x w BeamInt x Weight of deck slab, includes haunch and milling surface w SlabInt t slab t mill BeamSpacing h buildup b tf γ conc 1.11klf Moment  selfweight of deck slab, includes haunch and milling surface... M SlabInt ( x) w SlabInt L design x w SlabInt x Shear  selfweight of deck slab, includes haunch and milling surface... V SlabInt ( x) w SlabInt L design w SlabInt x Superstructure Design.01 Dead Loads 31
34 Weight of stayinplace forms w FormsInt BeamSpacing b tf ρ forms 0.1klf Moment  stayinplace forms... Shear  stayinplace forms.... M FormsInt ( x) V FormsInt ( x) w FormsInt L design x w FormsInt L design w FormsInt x w FormsInt x Weight of traffic railing barriers w barrier.interior 0.147klf Moment  traffic railing barriers... Shear  traffic railing barriers... M TrbInt ( x) V TrbInt ( x) w barrier.interior L design x w barrier.interior L design w barrier.interior x w barrier.interior x DC Load total w DC.BeamInt w BeamInt w SlabInt w FormsInt w barrier.interior.klf DC Load Moment M DC.BeamInt ( x) M BeamInt ( x) M SlabInt ( x) M FormsInt ( x) M TrbInt ( x) DC Load Shear V DC.BeamInt ( x) V BeamInt ( x) V SlabInt ( x) V FormsInt ( x) V TrbInt ( x) DC Load Rotation L design 3 w DC.BeamInt w barrier.interior θ DC.BeamInt 4E c.beam I nc 3 w barrier.interior L design 4E c.beam I Interior 0.81deg Design Moments and Shears for DW Dead Loads Weight of future wearing surface w FwsInt BeamSpacingρ fws 0klf Moment  weight of future wearing surface... M FwsInt ( x) w FwsInt L design x w FwsInt x Superstructure Design.01 Dead Loads 3
A.2 AASHTO Type IV, LRFD Specifications
A.2 AASHTO Type IV, LRFD Specifications A.2.1 INTRODUCTION A.2.2 DESIGN PARAMETERS 1'5.0" Detailed example showing sample calculations for design of typical Interior AASHTO Type IV prestressed concrete
More informationA transverse strip of the deck is assumed to support the truck axle loads. Shear and fatigue of the reinforcement need not be investigated.
Design Step 4 Design Step 4.1 DECK SLAB DESIGN In addition to designing the deck for dead and live loads at the strength limit state, the AASHTOLRFD specifications require checking the deck for vehicular
More informationIndex 20010 Series Prestressed FloridaI Beams (Rev. 07/12)
Index 20010 Series Prestressed FloridaI Beams (Rev. 07/12) Design Criteria AASHTO LRFD Bridge Design Specifications, 6th Edition; Structures Detailing Manual (SDM); Structures Design Guidelines (SDG)
More informationIntroduction to LRFD, Loads and Loads Distribution
Introduction to LRFD, Loads and Loads Distribution Thomas K. Saad, P.E. Federal Highway Administration Chicago, IL Evolution of Design Methodologies SLD Methodology: (f t ) D + (f t ) L 0.55F y, or 1.82(f
More informationFourSpan PS Concrete Beam AASHTO Type III Continuous Spans Input
FourSpan PS Concrete Beam AASHTO Type III Continuous Spans Input AsBuilt Model Only November, 2011 VDOT VERSION 6.2 1 DETAILED EXAMPLE FOURSPAN PS CONCRETE BEAM AASHTO TYPE III CONTINUOUS SPANS INPUT
More informationLongterm serviceability of the structure Minimal maintenance requirements Economical construction Improved aesthetics and safety considerations
Design Step 7.1 INTEGRAL ABUTMENT DESIGN General considerations and common practices Integral abutments are used to eliminate expansion joints at the end of a bridge. They often result in Jointless Bridges
More informationSECTION 5 ANALYSIS OF CONTINUOUS SPANS DEVELOPED BY THE PTI EDC130 EDUCATION COMMITTEE LEAD AUTHOR: BRYAN ALLRED
SECTION 5 ANALYSIS OF CONTINUOUS SPANS DEVELOPED BY THE PTI EDC130 EDUCATION COMMITTEE LEAD AUTHOR: BRYAN ALLRED NOTE: MOMENT DIAGRAM CONVENTION In PT design, it is preferable to draw moment diagrams
More informationMAY 2015 LRFD BRIDGE DESIGN 31
MAY 2015 LRFD BRIDGE DESIGN 31 3. LOAD AND LOAD FACTORS The loads section of the AASHTO LRFD Specifications is greatly expanded over that found in the Standard Specifications. This section will present
More informationChapter 12 LOADS AND LOAD FACTORS NDOT STRUCTURES MANUAL
Chapter 12 LOADS AND LOAD FACTORS NDOT STRUCTURES MANUAL September 2008 Table of Contents Section Page 12.1 GENERAL... 121 12.1.1 Load Definitions... 121 12.1.1.1 Permanent Loads... 121 12.1.1.2 Transient
More informationFEBRUARY 2014 LRFD BRIDGE DESIGN 41
FEBRUARY 2014 LRFD BRIDGE DESIGN 41 4. STRUCTURAL ANALYSIS AND EVALUATION The analysis of bridges and structures is a mixture of science and engineering judgment. In most cases, use simple models with
More informationSLAB DESIGN EXAMPLE. Deck Design (AASHTO LRFD 9.7.1) TYPICAL SECTION. County: Any Hwy: Any Design: BRG Date: 7/2010
County: Any Hwy: Any Design: BRG Date: 7/2010 SLAB DESIGN EXAMPLE Design example is in accordance with the AASHTO LRFD Bridge Design Specifications, 5th Ed. (2010) as prescribed by TxDOT Bridge Design
More informationSECTION 3 DESIGN OF POST TENSIONED COMPONENTS FOR FLEXURE
SECTION 3 DESIGN OF POST TENSIONED COMPONENTS FOR FLEXURE DEVELOPED BY THE PTI EDC130 EDUCATION COMMITTEE LEAD AUTHOR: TREY HAMILTON, UNIVERSITY OF FLORIDA NOTE: MOMENT DIAGRAM CONVENTION In PT design,
More information3.2 DEFINITIONS, cont. Revise or add the following definitions::
CALIFORNIA AMENDMENTS TO AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS THIRD EDITION W/ INTERIMS THRU 2006 _32A, 33A 3.2 DEFINITIONS, cont. Revise or add the following definitions:: Permanent Loads Loads
More informationPrecast Balanced Cantilever Bridge Design Using AASHTO LRFD Bridge Design Specifications
Design Example Precast Balanced Cantilever Bridge Design Using AASHTO LRFD Bridge Design Specifications Prepared by Teddy S. Theryo, PE Major Bridge Service Center Prepared for American Segmental Bridge
More informationSteel Bridge Design Handbook
U.S. Department of Transportation Federal Highway Administration Steel Bridge Design Handbook Loads and Load Combinations Publication No. FHWAIF12052  Vol. 7 November 2012 Notice This document is disseminated
More informationSafe & Sound Bridge Terminology
Safe & Sound Bridge Terminology Abutment A retaining wall supporting the ends of a bridge, and, in general, retaining or supporting the approach embankment. Approach The part of the bridge that carries
More informationSECTION 3 DESIGN OF POST TENSIONED COMPONENTS FOR FLEXURE
SECTION 3 DESIGN OF POST TENSIONED COMPONENTS FOR FLEXURE DEVELOPED BY THE PTI EDC130 EDUCATION COMMITTEE LEAD AUTHOR: TREY HAMILTON, UNIVERSITY OF FLORIDA NOTE: MOMENT DIAGRAM CONVENTION In PT design,
More informationReinforced Concrete Slab Design Using the Empirical Method
Reinforced Concrete Slab Design Using the Empirical Method BridgeSight Solutions for the AASHTO LRFD Bridge Design Specifications BridgeSight Software TM Creators of effective and reliable solutions for
More informationNational Council of Examiners for Engineering and Surveying. Principles and Practice of Engineering Structural Examination
Structural Effective Beginning with the April 2011 The structural engineering exam is a breadth and exam examination offered in two components on successive days. The 8hour Vertical Forces (Gravity/Other)
More informationTwoWay PostTensioned Design
Page 1 of 9 The following example illustrates the design methods presented in ACI 31805 and IBC 2003. Unless otherwise noted, all referenced table, figure, and equation numbers are from these books. The
More informationDetailing of Reinforcment in Concrete Structures
Chapter 8 Detailing of Reinforcment in Concrete Structures 8.1 Scope Provisions of Sec. 8.1 and 8.2 of Chapter 8 shall apply for detailing of reinforcement in reinforced concrete members, in general. For
More informationSHEAR IN SKEWED MULTIBEAM BRIDGES
207/Task 107 COPY NO. SHEAR IN SKEWED MULTIBEAM BRIDGES FINAL REPORT Prepared for National Cooperative Highway Research Program Transportation Research Board National Research Council Modjeski and Masters,
More informationChallenging Skew: Higgins Road Steel IGirder Bridge over I90 OTEC 2015  October 27, 2015 Session 26
2014 HDR Architecture, 2014 2014 HDR, HDR, Inc., all all rights reserved. Challenging Skew: Higgins Road Steel IGirder Bridge over I90 OTEC 2015  October 27, 2015 Session 26 Brandon Chavel, PhD, P.E.,
More informationLOAD TESTING FOR BRIDGE RATING: DEAN S MILL OVER HANNACROIS CREEK
REPORT FHWA/NY/SR06/147 LOAD TESTING FOR BRIDGE RATING: DEAN S MILL OVER HANNACROIS CREEK OSMAN HAGELSAFI JONATHAN KUNIN SPECIAL REPORT 147 TRANSPORTATION RESEARCH AND DEVELOPMENT BUREAU New York State
More informationDESIGN OF SLABS. 3) Based on support or boundary condition: Simply supported, Cantilever slab,
DESIGN OF SLABS Dr. G. P. Chandradhara Professor of Civil Engineering S. J. College of Engineering Mysore 1. GENERAL A slab is a flat two dimensional planar structural element having thickness small compared
More informationDesign of reinforced concrete columns. Type of columns. Failure of reinforced concrete columns. Short column. Long column
Design of reinforced concrete columns Type of columns Failure of reinforced concrete columns Short column Column fails in concrete crushed and bursting. Outward pressure break horizontal ties and bend
More informationThe Design of Reinforced Concrete Slabs
EGN5439 The Design of Tall Buildings Lecture #14 The Design of Reinforced Concrete Slabs Via the Direct Method as per ACI 31805 L. A. PrietoPortar  2008 Reinforced concrete floor systems provide an
More informationTechnical Notes 3B  Brick Masonry Section Properties May 1993
Technical Notes 3B  Brick Masonry Section Properties May 1993 Abstract: This Technical Notes is a design aid for the Building Code Requirements for Masonry Structures (ACI 530/ASCE 5/TMS 40292) and Specifications
More informationThe following sketches show the plans of the two cases of oneway slabs. The spanning direction in each case is shown by the double headed arrow.
9.2 Oneway Slabs This section covers the following topics. Introduction Analysis and Design 9.2.1 Introduction Slabs are an important structural component where prestressing is applied. With increase
More informationOverhang Bracket Loading. Deck Issues: Design Perspective
Deck Issues: Design Perspective Overhang Bracket Loading Deck overhangs and screed rails are generally supported on cantilever brackets during the deck pour These brackets produce an overturning couple
More informationABSTRACT 1. INTRODUCTION 2. DESCRIPTION OF THE SEGMENTAL BEAM
Ninth LACCEI Latin American and Caribbean Conference (LACCEI 11), Engineering for a Smart Planet, Innovation, Information Technology and Computational Tools for Sustainable Development, August 3, 11,
More informationDraft Table of Contents. Building Code Requirements for Structural Concrete and Commentary ACI 31814
Draft Table of Contents Building Code Requirements for Structural Concrete and Commentary ACI 31814 BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI 318 14) Chapter 1 General 1.1 Scope of ACI 318
More informationBRIDGE DESIGN SPECIFICATIONS APRIL 2000 SECTION 9  PRESTRESSED CONCRETE
SECTION 9  PRESTRESSED CONCRETE Part A General Requirements and Materials 9.1 APPLICATION 9.1.1 General The specifications of this section are intended for design of prestressed concrete bridge members.
More informationSteel Deck. A division of Canam Group
Steel Deck A division of Canam Group TABLE OF CONTENTS PAGE OUR SERVICES... 4 NOTES ABOUT LOAD TABLES... 5 P3615 & P3606 DIMENSIONS & PHYSICAL PROPERTIES... 6 FACTORED AND SERVICE LOADS... 7 P2436 &
More informationCHAPTER 13 CONCRETE COLUMNS
CHAER 13 CONCREE COUMNS ABE OF CONENS 13.1 INRODUCION... 131 13.2 YES OF COUMNS... 131 13.3 DESIGN OADS... 131 13.4 DESIGN CRIERIA... 132 13.4.1 imit States... 132 13.4.2 Forces... 132 13.5 AROXIMAE
More informationAPPENDIX H DESIGN CRITERIA FOR NCHRP 1279 PROJECT NEW BRIDGE DESIGNS
APPENDIX H DESIGN CRITERIA FOR NCHRP 1279 PROJECT NEW BRIDGE DESIGNS This appendix summarizes the criteria applied for the design of new hypothetical bridges considered in NCHRP 1279 s Task 7 parametric
More informationChapter 5 Bridge Deck Slabs. Bridge Engineering 1
Chapter 5 Bridge Deck Slabs Bridge Engineering 1 Basic types of bridge decks Insitu reinforced concrete deck (most common type) Precast concrete deck (minimize the use of local labor) Open steel grid
More informationLRFD Bridge Design. AASHTO LRFD Bridge Design Specifications. Loading and General Information
LRFD Bridge Design AASHTO LRFD Bridge Design Specifications Loading and General Information Created July 2007 This material is copyrighted by The University of Cincinnati, Dr. James A Swanson, and Dr.
More informationSEISMIC UPGRADE OF OAK STREET BRIDGE WITH GFRP
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 16, 2004 Paper No. 3279 SEISMIC UPGRADE OF OAK STREET BRIDGE WITH GFRP Yuming DING 1, Bruce HAMERSLEY 2 SUMMARY Vancouver
More informationReinforced Concrete Design
FALL 2013 C C Reinforced Concrete Design CIVL 4135 ii 1 Chapter 1. Introduction 1.1. Reading Assignment Chapter 1 Sections 1.1 through 1.8 of text. 1.2. Introduction In the design and analysis of reinforced
More informationSession 5D: Benefits of Live Load Testing and Finite Element Modeling in Rating Bridges
Session 5D: Benefits of Live Load Testing and Finite Element Modeling in Rating Bridges Douglas R. Heath P.E., Structural Engineer Corey Richard P.E., Project Manager AECOM Overview Bridge Testing/Rating
More informationComposite Sections and Steel Beam Design. Composite Design. Steel Beam Selection  ASD Composite Sections Analysis Method
Architecture 324 Structures II Composite Sections and Steel Beam Design Steel Beam Selection  ASD Composite Sections Analysis Method Photo by Mike Greenwood, 2009. Used with permission University of Michigan,
More information16. BeamandSlab Design
ENDP311 Structural Concrete Design 16. BeamandSlab Design BeamandSlab System How does the slab work? L beams and T beams Holding beam and slab together University of Western Australia School of Civil
More information4B2. 2. The stiffness of the floor and roof diaphragms. 3. The relative flexural and shear stiffness of the shear walls and of connections.
Shear Walls Buildings that use shear walls as the lateral forceresisting system can be designed to provide a safe, serviceable, and economical solution for wind and earthquake resistance. Shear walls
More informationType of Force 1 Axial (tension / compression) Shear. 3 Bending 4 Torsion 5 Images 6 Symbol (+ )
Cause: external force P Force vs. Stress Effect: internal stress f 05 Force vs. Stress Copyright G G Schierle, 200105 press Esc to end, for next, for previous slide 1 Type of Force 1 Axial (tension /
More informationBasics of Reinforced Concrete Design
Basics of Reinforced Concrete Design Presented by: Ronald Thornton, P.E. Define several terms related to reinforced concrete design Learn the basic theory behind structural analysis and reinforced concrete
More informationDesign of Steel Structures Prof. S.R.Satish Kumar and Prof. A.R.Santha Kumar. Fig. 7.21 some of the trusses that are used in steel bridges
7.7 Truss bridges Fig. 7.21 some of the trusses that are used in steel bridges Truss Girders, lattice girders or open web girders are efficient and economical structural systems, since the members experience
More information11/1/2010 3:57 PM 1 of 11
Masonry Wall 6.0  MASONRY WALL ANALYSIS AND DESIGN ================================================================================ Job ID : Job Description : Designed By : ================================================================================
More informationSince the Steel Joist Institute
SELECTING and SPECIFYING Wesley B. Myers, P.E. An insider s guide to selecting and specifying Kseries, LH, DLHseries joists and joist girders Since the Steel Joist Institute adopted the first standard
More informationCH. 2 LOADS ON BUILDINGS
CH. 2 LOADS ON BUILDINGS GRAVITY LOADS Dead loads Vertical loads due to weight of building and any permanent equipment Dead loads of structural elements cannot be readily determined b/c weight depends
More informationINTRODUCTION TO BEAMS
CHAPTER Structural Steel Design LRFD Method INTRODUCTION TO BEAMS Third Edition A. J. Clark School of Engineering Department of Civil and Environmental Engineering Part II Structural Steel Design and Analysis
More informationSEISMIC DESIGN. Various building codes consider the following categories for the analysis and design for earthquake loading:
SEISMIC DESIGN Various building codes consider the following categories for the analysis and design for earthquake loading: 1. Seismic Performance Category (SPC), varies from A to E, depending on how the
More informationFOOTING DESIGN EXAMPLE
County: Any Design: BRG Date: 10/007 Hwy: Any Ck Dsn: BRG Date: 10/007 FOOTING DESIGN EXAMPLE Design: Based on AASHTO LRFD 007 Specifications, TxDOT LRFD Bridge Design Manual, and TxDOT Project 04371
More informationTwo Way Slab. Problem Statement:
Two Way Slab Problem Statement: Use the ACI 318 Direct Design Method to design an interior bay of a flat plate slab system of multi bay building. The Dimensions of an interior bay are shown in Figure 1.
More informationFOUNDATION DESIGN. Instructional Materials Complementing FEMA 451, Design Examples
FOUNDATION DESIGN Proportioning elements for: Transfer of seismic forces Strength and stiffness Shallow and deep foundations Elastic and plastic analysis Foundation Design 141 Load Path and Transfer to
More informationTable of Contents. July 2015 121
Table of Contents 12.1 General... 3 12.2 Abutment Types... 5 12.2.1 FullRetaining... 5 12.2.2 SemiRetaining... 6 12.2.3 Sill... 7 12.2.4 SpillThrough or Open... 7 12.2.5 PileEncased... 8 12.2.6 Special
More informationSLAB DESIGN. Introduction ACI318 Code provides two design procedures for slab systems:
Reading Assignment SLAB DESIGN Chapter 9 of Text and, Chapter 13 of ACI31802 Introduction ACI318 Code provides two design procedures for slab systems: 13.6.1 Direct Design Method (DDM) For slab systems
More informationGuidelines for the Design of PostTensioned Floors
Guidelines for the Design of PostTensioned Floors BY BIJAN O. AALAMI AND JENNIFER D. JURGENS his article presents a set of guidelines intended to T assist designers in routine posttensioning design,
More informationDESIGN OF PRESTRESSED BARRIER CABLE SYSTEMS
8601 North Black Canyon Highway Suite 103 Phoenix, AZ 8501 For Professionals Engaged in PostTensioning Design Issue 14 December 004 DESIGN OF PRESTRESSED BARRIER CABLE SYSTEMS by James D. Rogers 1 1.0
More information1997 Uniform Administrative Code Amendment for Earthen Material and Straw Bale Structures Tucson/Pima County, Arizona
for Earthen Material and Straw Bale Structures SECTION 70  GENERAL "APPENDIX CHAPTER 7  EARTHEN MATERIAL STRUCTURES 70. Purpose. The purpose of this chapter is to establish minimum standards of safety
More information8.2 Continuous Beams (Part I)
8.2 Continuous Beams (Part I) This section covers the following topics. Analysis Incorporation of Moment due to Reactions Pressure Line due to Prestressing Force Introduction Beams are made continuous
More informationEvaluation of Bridge Performance and Rating through Nondestructive
Evaluation of Bridge Performance and Rating through Nondestructive Load Testing Final Report Prepared by: Andrew Jeffrey, Sergio F. Breña, and Scott A.Civjan University of Massachusetts Amherst Department
More informationTABLE OF CONTENTS. Roof Decks 172 B, BA, BV Deck N, NA Deck. Form Decks 174.6 FD,.6 FDV Deck 1.0 FD, 1.0 FDV Deck 1.5 FD Deck 2.0 FD Deck 3.
Pages identified with the NMBS Logo as shown above, have been produced by NMBS to assist specifiers and consumers in the application of New Millennium Building Systems Deck products. Pages identified with
More informationFundamentals of PostTensioned Concrete Design for Buildings
Fundamentals of PostTensioned Concrete Design for Buildings Part One by John P. Miller www.suncam.com Copyright 2012 John P. Miller Page 1 of 49 Overview of This Course This is Part One of a threepart
More informationChapter 8. Flexural Analysis of TBeams
Chapter 8. Flexural Analysis of Ts 8.1. Reading Assignments Text Chapter 3.7; ACI 318, Section 8.10. 8.2. Occurrence and Configuration of Ts Common construction type. used in conjunction with either
More informationReinforced Concrete Design Project Five Story Office Building
Reinforced Concrete Design Project Five Story Office Building Andrew Bartolini December 7, 2012 Designer 1 Partner: Shannon Warchol CE 40270: Reinforced Concrete Design Bartolini 2 Table of Contents Abstract...3
More informationCHAPTER 1 INTRODUCTION
CHAPTER 1 INTRODUCTION 1.1 Background of the research Beam is a main element in structural system. It is horizontal member that carries load through bending (flexure) action. Therefore, beam will deflect
More informationREINFORCED CONCRETE. Reinforced Concrete Design. A Fundamental Approach  Fifth Edition. Walls are generally used to provide lateral support for:
HANDOUT REINFORCED CONCRETE Reinforced Concrete Design A Fundamental Approach  Fifth Edition RETAINING WALLS Fifth Edition A. J. Clark School of Engineering Department of Civil and Environmental Engineering
More informationChapter 3 PreInstallation, Foundations and Piers
Chapter 3 PreInstallation, Foundations and Piers 31 PreInstallation Establishes the minimum requirements for the siting, design, materials, access, and installation of manufactured dwellings, accessory
More informationCe 479 Fall 05. Steel Deck and Concrete Slab Composite Construction. J. Ramirez 1
Ce 479 Fall 05 Steel Deck and Concrete Slab Composite Construction J. Ramirez 1 Types of Floor Deck on Steel Joists/Girders Cast in Place Concrete on Steel Deck Composite Construction  Pages 4249 SDI
More informationREINFORCED CONCRETE. Reinforced Concrete Design. A Fundamental Approach  Fifth Edition
CHAPTER REINFORCED CONCRETE Reinforced Concrete Design A Fundamental Approach  Fifth Edition CONCRETE Fifth Edition A. J. Clark School of Engineering Department of Civil and Environmental Engineering
More informationINSERVICE PERFORMANCE AND BEHAVIOR CHARACTERIZATION OF THE HYBRID COMPOSITE BRIDGE SYSTEM A CASE STUDY
INSERVICE PERFORMANCE AND BEHAVIOR CHARACTERIZATION OF THE HYBRID COMPOSITE BRIDGE SYSTEM A CASE STUDY John M. Civitillo University of Virginia, USA Devin K. Harris University of Virginia, USA Amir Gheitasi
More informationOptimum proportions for the design of suspension bridge
Journal of Civil Engineering (IEB), 34 (1) (26) 114 Optimum proportions for the design of suspension bridge Tanvir Manzur and Alamgir Habib Department of Civil Engineering Bangladesh University of Engineering
More informationPENNDOT enotification
PENNDOT enotification Bureau of Project Delivery Bridge Design and Technology Division BRADD No. 036 October 18, 2013 Release of BRADD Version 3.2.0.0 The next release of PennDOT's Bridge Automated Design
More informationDesign Example 1 Reinforced Concrete Wall
Design Example 1 Reinforced Concrete Wall OVERVIEW The structure in this design example is an eightstory office with loadbearing reinforced concrete walls as its seismicforceresisting system. This
More informationAASHTOWare BrDR 6.8 Miscellanous Tutorial How BrDR Computes the Effective Flange Width
AASHTOWare BrDR 6.8 Miscellanous Tutorial How BrDR Computes the Effective Flange Width Std Effective Flange Width BrD/BrR/BrDR computes Std effective flange width based on AASHTO Standard Specifications
More information7.4 Loads and Load combinations
7.4 Loads and Load combinations 7.4.1 Loads on bridges The following are the various loads to be considered for the purpose of computing stresses, wherever they are applicable. Dead load Live load Impact
More informationA beam is a structural member that is subjected primarily to transverse loads and negligible
Chapter. Design of Beams Flexure and Shear.1 Section forcedeformation response & Plastic Moment (M p ) A beam is a structural member that is subjected primarily to transverse loads and negligible axial
More informationEFFECTS ON NUMBER OF CABLES FOR MODAL ANALYSIS OF CABLESTAYED BRIDGES
EFFECTS ON NUMBER OF CABLES FOR MODAL ANALYSIS OF CABLESTAYED BRIDGES YangCheng Wang Associate Professor & Chairman Department of Civil Engineering Chinese Military Academy FengShan 83000,Taiwan Republic
More information[TECHNICAL REPORT I:]
[Helios Plaza] Houston, Texas Structural Option Adviser: Dr. Linda Hanagan [TECHNICAL REPORT I:] Structural Concepts & Existing Conditions Table of Contents Executive Summary... 2 Introduction... 3 Structural
More informationFINAL REPORT STRUCTURAL LOAD TESTING AND FLEXURE ANALYSIS OF THE ROUTE 701 BRIDGE IN LOUISA COUNTY, VIRGINIA
FINAL REPORT STRUCTURAL LOAD TESTING AND FLEXURE ANALYSIS OF THE ROUTE 701 BRIDGE IN LOUISA COUNTY, VIRGINIA Jeremy Lucas Graduate Research Assistant Charles E. Via, Jr. Department of Civil and Environmental
More informationChapter 4 FLOOR CONSTRUCTION
Chapter 4 FLOOR CONSTRUCTION Woodframe floor systems and concrete slabongrade floors are discussed in this chapter. Although coldformed steel framing for floor systems also is permitted by the IRC,
More informationChapter 9 CONCRETE STRUCTURE DESIGN REQUIREMENTS
Chapter 9 CONCRETE STRUCTURE DESIGN REQUIREMENTS 9.1 GENERAL 9.1.1 Scope. The quality and testing of concrete and steel (reinforcing and anchoring) materials and the design and construction of concrete
More informationSeismic Design of Shallow Foundations
Shallow Foundations Page 1 Seismic Design of Shallow Foundations Reading Assignment Lecture Notes Other Materials Ch. 9 FHWA manual Foundations_vibrations.pdf Homework Assignment 10 1. The factored forces
More informationPRESTRESSED CONCRETE. Introduction REINFORCED CONCRETE CHAPTER SPRING 2004. Reinforced Concrete Design. Fifth Edition. By Dr. Ibrahim.
CHAPTER REINFORCED CONCRETE Reinforced Concrete Design A Fundamental Approach  Fifth Edition Fifth Edition PRESTRESSED CONCRETE A. J. Clark School of Engineering Department of Civil and Environmental
More informationSpon Press PRESTRESSED CONCRETE DESIGN EUROCODES. University of Glasgow. Department of Civil Engineering. Prabhakara Bhatt LONDON AND NEW YORK
PRESTRESSED CONCRETE DESIGN TO EUROCODES Prabhakara Bhatt Department of Civil Engineering University of Glasgow Spon Press an imprint of Taytor & Francfe LONDON AND NEW YORK CONTENTS Preface xix Basic
More informationDESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES PART V SEISMIC DESIGN
DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES PART V SEISMIC DESIGN MARCH 2002 CONTENTS Chapter 1 General... 1 1.1 Scope... 1 1.2 Definition of Terms... 1 Chapter 2 Basic Principles for Seismic Design... 4
More informationSEPTEMBER 2013 LRFD BRIDGE DESIGN 121
SEPTEMBER 2013 LRFD BRIDGE DESIGN 121 12. BURIED STRUCTURES Buried structures serve a variety of purposes. They are typically used for conveying water. At other times they are used to provide a grade
More informationINTERNATIONAL BUILDING CODE STRUCTURAL
INTERNATIONAL BUILDING CODE STRUCTURAL S506/07 1604.11 (New), 1605 (New) Proposed Change as Submitted: Proponent: William M. Connolly, State of New Jersey, Department of Community Affairs, Division of
More informationSPECIFICATIONS, LOADS, AND METHODS OF DESIGN
CHAPTER Structural Steel Design LRFD Method Third Edition SPECIFICATIONS, LOADS, AND METHODS OF DESIGN A. J. Clark School of Engineering Department of Civil and Environmental Engineering Part II Structural
More informationGeneral Overview of PostTensioned Concrete Design
PDHonline Course S127 (2 PDH) General Overview of PostTensioned Concrete Design Instructor: D. Matthew Stuart, P.E., S.E., F.ASCE, F.SEI, SECB, MgtEng 2013 PDH Online PDH Center 5272 Meadow Estates Drive
More informationUSE OF MICROPILES IN TEXAS BRIDGES. by John G. Delphia, P.E. TxDOT Bridge Division Geotechnical Branch
USE OF MICROPILES IN TEXAS BRIDGES by John G. Delphia, P.E. TxDOT Bridge Division Geotechnical Branch DEFINITION OF A MICROPILE A micropile is a small diameter (typically less than 12 in.), drilled and
More informationDesign of an Industrial Truss
Design of an Industrial Truss Roofing U 2 U 3 Ridge U 4 Sagrod 24 U 1 U 5 L 0 L 1 L 2 L 3 L 4 L 5 L 6 6@20 = 120 Elevation of the Truss Top Cord Bracing Sagrod Purlin at top, Bottom Cord Bracing at bottom
More informationReinforced Concrete Design SHEAR IN BEAMS
CHAPTER Reinforced Concrete Design Fifth Edition SHEAR IN BEAMS A. J. Clark School of Engineering Department of Civil and Environmental Engineering Part I Concrete Design and Analysis 4a FALL 2002 By Dr.
More informationSteel joists and joist girders are
THE STEEL CONFERENCE Hints on Using Joists Efficiently By Tim Holtermann, S.E., P.E.; Drew Potts, P.E.; Bob Sellers, P.E.; and Walt Worthley, P.E. Proper coordination between structural engineers and joist
More informationREPLACING A COMPOSITE RC BRIDGE DECK WITH AN FRP DECK THE EFFECT ON SUPERSTRUCTURE STRESSES
AsiaPacific Conference on FRP in Structures (APFIS 2007) S.T. Smith (ed) 2007 International Institute for FRP in Construction REPLACING A COMPOSITE RC BRIDGE DECK WITH AN FRP DECK THE EFFECT ON SUPERSTRUCTURE
More information2015 ODOT Bridge Design Conference May 12, 2014. DeJong Rd Bridge High Seismic Zone Case Study: Bridge Rehab vs. Replacement.
2015 ODOT Bridge Design Conference May 12, 2014 DeJong Rd Bridge High Seismic Zone Case Study: Bridge Rehab vs. Replacement Mary Ann Triska 2015 HDR, all rights reserved. Presentation Outline Project
More informationUS 51 Ohio River Bridge Engineering and Environmental Study
US 51 Ohio River Bridge Engineering and Environmental Study ITEM NOS. 1100.00 & 11140.00 Prepared by: Michael Baker Jr., Inc. 9750 Ormsby Station Rd Louisville, KY 40223 August 16, 2013 Table of Contents
More informationCH. 6 SOILS & FOUNDATIONS
CH. 6 SOILS & FOUNDATIONS SOIL PROPERTIES Classified into four groups  Sands & gravels  Clays  Silts  Organics Subsurface Exploration Core borings: undisturbed samples of soil  Recovered bore samples
More informationTXDOT ENGINEERING SOFTWARE SUPPORT INFORMATION. Prestressed Concrete Girder SUPERstructure Design and Analysis Program (PGSuper TM )
Last Update: June 21, 2016 TXDOT ENGINEERING SOFTWARE SUPPORT INFORMATION Prestressed Concrete Girder SUPERstructure Design and Analysis Program (PGSuper TM ) This document provides enduser support information
More information