Stålbyggnadsforskning i Sverige KTH, LTU Malmö 2012 Milan Veljkovic 2012-10-18 1
Innehåll Stålbyggnad LTU (ca 70-80% stålbyggnadsforskning i Sverige) Lista av forskningsprojekt (brand, broar, förband, materialforskning) Urval av doktorandprojekt (KTH, LTU) 2
Steel Structure Head Milan Veljkovic Part-time Professors: Ulf Wickström, SP Mikael Möller, AREVA Björn Sundström, SP Björn Karlsson, Brunamálastofnun, Asif Usmani, Edinburgh Univ. visting prof. Martin Gille, Edinburgh Univ. visting prof. --------------------------------------------- Mattias Unosson, TrueStress 10-12 PhD students (13 in October 2012) NN senior 2012.12.01. 3
Steel Structure Research Group 2012 Christine Heistermann Tim Heistermann Olga Garzon Naveed Iqbal Joakim Sandström Alexandra Byström Anh Tuan Tran Pourya Noury 4
Steel Structure Research Group 2012 A part time PhD students Hans Petursson (Trafikverket), Robert Hällmark, Prof. Peter Collin, Mattias Nilsson (Ramböll) Andreas Gustafsson AREVA Milan Veljkovic, LTU 5
Larger LTU:s on-going research and educational projects COMPFIRE, Design of joints to composite columns for improved fire robustness (2009-2012) HISTWIN2, High-Strength Steel Tower for Wind Turbine (2010-2013) RINGMAN, Offshore Wind Turbine Towers A Quicker, Cheaper Flange Supply Route (2011-2014) FRAMEUP, Optimization of frames for effective assembling (2011-2014) Friction connection with long open slotted holes in high-strength tubular towers (2012-2013) CHS2 HILONG, High Strength Long Span Structures (2012-2015) RUOSTE, RUles On high Strength STEel (2012-2015) Erasmus Mundus Sustainable Constructions under Natural Hazards and Catastrophic Events (2012-2015) INTAB+, Economic and Durable Design of Composite Bridges with Integral Abutments (2009-2010), extended to 2011 for SBUF 6
Bridges: Buildings Fatigue (KTH, LTU)- monitoring, Prefabricated deck full-scale tests Scope of research Modular buildings (assembling technology, joints, building components, energy effectiveness) pilot building, small scale test Fire safety, design of details for improved fire safety in office buildings and single story building Towers for wind turbines (started 2006) Optimization of cross section (tubular vs. circular section) Modularization of the towers, steel solutions for towers higher than 100 m Stiffening of door opening High strength bolts Material modeling (new) Safety of nuclear power plants Stochastic material imperfections 7
Omsättning Stålbyggnad Thousands 9 000 8 000 7 000 Intäkter Stålbyggnad 2008 2012 8 955 8 499 7 808 6 000 5 916 5 000 4 000 3 000 2 000 3 751 3 047 2 061 3 553 2 931 4 874 4 163 3 994 2008 2009 2010 2011 2012 1 000 925 1 034 585 261 0 Anslag forskning Externa medel uppdrag Externa medel bidrag Totalt Stål 8
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BRIFAG Bridge Fatigue Guidence Meeting Sustainable Design and Assessment Ett europeiskt samarbetsprojekt med partners från följande länder : Sverige Tyskland Frankrike Tjeckien Storbritannien Rambölls part : Task 3.4 Connection of vertical stiffeners Behandlar utmattning av svetsar mellan livavstyvningar och överflänsar i samverkansbroar
10 0-10 -20-30 -40-50 -60-70 -80 BRIFAG Bridge Fatigue Guidence Meeting Sustainable Design and Assessment Långtidsmätningar på en bro Delskadeanalyser 5 0-5 -10-15 -20-25 -30 Korttidsmätningar på en bro FE-analyser Undersökning av en sprickyta Lab tester vid LTU Sammanfattning av arbetet
ELEM Prefabricerade samverkansbroar - en studie av torra fogar Forskningsrapporter: - 5 publicerade artiklar 3 enspannsbroar byggda - 2 konferensbidrag Fältförsök - 1 Licentiatavhandling Småskaliga tester Storskaliga tester
Optimization of frames for effective assembling FRAMEUP (2011-2014)
Research Buildings for improvements of energy sustainable modular buildings Luleå University of Technology Dept. of Civil and Environmental Engineering Luleå RWTH Aachen University Lehrstuhl für Stahlbau Aachen Universidade de Coimbra Coimbra 14
Modular Research Building RWTH Modular Research Building in Steel Investigation of new and advanced light-weight steel constructions under real boundary conditions, e.g. - Total Energy Performance - Lifecycle Analysis/Costs - Thermal Bridges - Air Tightness
Steel intensive Research Building, Coimbra 16
Optimization of frames for effective assembling (2011-2014) Research building in Luleå- Pedro Andrade 17
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19 Optimization of lifting equipment (RWTH)
20 Lifting of the frame (RWTH)
Fire Safety in Structures by Testing and Computation Resistance of joints exposed to fire, COMPFIRE project, Design of joints to composite columns for improved fire robustness. (EU project) Heat transfer to structures based on CFD fire modelling, FDS, (Brandforsk with SP). Unprotected steel supermarkets (ICA hallar) - MSc thesis project. Development of models for heat transfer from localized fires in large premises to beams and columns. Comparisons with Eurocode rules. (Brandforsk with SP) Fire Furnace, LTU Vaseli, Czech Sheffield, UK SP-Borås 21
Reverse channel connections- Component method in fire (Tim Heistermann) Reaction frame Furnace Load Jack University of Coimbra Connection rotation 600.00 Welded profiles t web = 12 mm The University of Sheffield 140 500.00 120 400.00 Force [kn] 100 80 60 40 test FEA Load [kn] 300.00 200.00 100.00 Test 3: W T20 12 (P1 Load device) Test 3: W T20 12 (P2 photog) Test 3: FEA 20 0.00 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70 0 Displacement [mm] 0 5 10 15 20 25 Rotation [ ] 22
Sub-frame analysis (Naveed Iqbal) Three steps FE analysis 7 experiments University of Coimbra 23
Compartment fire and localized fire measured end estimated acc. EN1991-1-2 (Alexandra Byström) 1200 1000 T ( C) 800 600 400 200 0 1,2 2,2 3,2 4,2 5,2 Height from the base of the pool (m) 0 min 2 min 4 min 6 min 8 min 10 min 12 min 14 min 1200 0 1 fl T ( C) 1000 800 600 400 200 1,2 2,2 3,2 4,2 5,2 Height from the base of the pool 0 min 2 min 4 min 6 min 8 min 10 min 12 min 14 min
An integrated Approach for analytical evaluation of a single story steel building exposed to fire - A pre-study: MSc. thesis Lars-Olof Björkstad- 25
Influence of the support detail 26
Additional study (Naveed Iqbal, PhD student) - Applied design load - Fully constrained supp. - Increasing temp. (EKS area) OK 27
Door opening a tubular tower for wind turbines Anh Tuan Tran 28
Flange of the tubular tower for wind turbines Pourya Noury 29
(Nuclear) Power Plant Safety Material modelling Experiments and Theoretical Study Andreas Gustafsson Ratcheting of pressurized components Progressive plastic deformation cycle by cycle Hinge Applied displacement (two parts, hinged) Difficulties in numerical simulation Inherent material ratcheting affecting the overall ratcheting Presence of cyclic hardening Hinge