San Francisco Oakland Bay Bridge East Span Seismic Safety Project
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1 San Francisco Oakland Bay Bridge East Span Seismic Safety Project Presented To: Society of American Military Engineers May 16, 2013 Brian Maroney, P.E. Dr. Engr. Karen Wang, P.E. Pier E9 Following the 1989 Loma Prieta Earthquake Brian Maroney, P.E. Dr. Engr. Karen Wang, P.E. 1
2 Bay Area Faults 2
3 Project Limits SFOBB East Span Segments YBI TRANSITION SUSPENSION SKYWAY OAKLAND APPROACH 3
4 Oakland Touch Down Cross Section Skyway Segment Section of Skyway 4
5 Self Anchored Suspension Span (SAS) Tower Transverse Elevation View 5
6 Orthotropic Box Girders (OBG) Typical Cross Section 5 lanes each bridge (3.6m wide each lane) Shoulders on each side (3m wide) Bikepath ~4.9m wide Main Cable Protective Coating Cable Diameter 784mm (31 inches) Elastic Paint S Wire Wrap Zinc Paste 137 PWS in the main cable 127 galvanized (5.4mm dia.) wires in each parallel wire strand (PWS) 6
7 Yerba Buena Island Transition Segment Pier 7 7
8 View of Oakland Touch Down, Looking West View of Skyway, Looking West 8
9 View of SAS, Looking East View Looking North 9
10 Cantilever Cantilever 10
11 Cantilever 11
12 We take our codes with us to the work Concrete Test 12
13 Reinforcing Steel Bar Test Video Prestressing Steel Test Video 13
14 Procedure Qualification Records (PQR) For Groove Weld Test Plates Video Bolt Test Video 14
15 Suspender Test Video Inelastic Column Testing Ft = 2,600 kn Fb = 4,500 kn Fv = 7,900 kn t = 460 mm b = 100 mm Skyway Pier System Test Example of Full Scale Pier Test 15
16 Inelastic Column Testing 6.5m Pier 6.5m pier Moment (MN.m) Longitudinal Transverse Diagonal (55 deg) Curvature (rad/m) 16
17 Self Anchored Suspension Span (SAS) T1 Foundation 17
18 Marine Drilling Barge Geologic Main Pier 18
19 T1 Tower Foundation T1 (Main Tower) Foundation Octagonal footing layout 12 perimeter and 1 center piles Pilecap is 22.5 x 24 m
20 SAS Tower Pile Details (continued) Positioning Piletop Drill Rig 20
21 Drill 2.2 m Diameter Rock Socket Completed Rebar Cage 21
22 Concrete Compressive Strength Test Data Example of Jack Hammer 22
23 How is GGL Testing Performed? How is CSL Performed? 23
24 Selected Computer Models Used in Design YBI Structure SAS Structure Skyway Structure Hinge ABAQUS Courtesy of Anatech Time History Analysis P M Diagram Section A A 24
25 Pile Cap Transverse Load vs. Displacement Location of Removed Pile (6 Models) 25
26 Push Over Analysis Self Anchored Suspension Span (SAS) 26
27 East Cable Anchorage Layout East Saddle Grillage Boundary Conditions: Shear Keys and Bearings at East Pier (E2) Shear Keys, Typ Bearing, Typ 27
28 Example of Jack Hammer See Through Image at Pier E2 28
29 Time Dependent Behavior 29
30 SEM 1 2 SEM 1 30
31 Tensile Sample from the Shank 1 5 The Toll Bridge Seismic Safety Peer Review Panel (TBSSPRP) TBSSPRP has been involved to various degrees in the review of the State s highly valued long span Toll Bridges. Regularly involved with the new East Span of the SFOBB Has been informed of all significant decisions on the new East Span of the SFOBB Caltrans has considered input from TBSSPRP members regarding all significant decisions on the new East Span of the SFOBB Operates as an adhoc committee, meeting on the request of Caltrans. TBSSPRP current membership includes: Dr. Frieder Seible, Mr. Joe Nicoletti, Dr. I.M. Idriss, and Dr. John Fisher. 31
32 Self Anchored Suspension Bridge During Construction at Night SFOBB Self Anchored Suspension Bridge Segment Hinge A East Hinge K West 32
33 SFOBB SAS Load Transfer Video QA/QC Expert Review Panel Mr. David McQuaid (Chair of AWS D1.5 Committee) Mr. Don Rager (Chair of AWS D1.1 Committee) Dr. John Barsom (Fracture Mechanics Specialist and Metallurgist) Mr. Alan Cavendish Tribe (Prof. Welding Expert Engineer) 33
34 SAS Field Review by Seismic Peer Review Panel Bay Bridge Project Campus Pier 7 Designer Caltrans Construction PIO Contractor Toll Bridge Management 34
35 Bay Bridge Project Campus Pier 7 Communication Cooperation Collaboration Photographs and Videos are Courtesy of the Department of Transportation and Bay Bridge Project Staff 35
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