Progressive Collapse Resistance of Bolted Extended End-Plate Moment Connections

다국어 초록 (Multilingual Abstract)

When a progressive collapse occurs due to sudden column removal, the moment connections must have adequate strength and be able to bridge over the damaged element. The present study comprehensively investigates the behavior of eight diff erent types of extended end-plate beam-to-column connections against progressive collapse. The proper fi nite element models have been extended to assess the behavior of these bolted connections under a sudden column removal scenario. Specimens were checked by nonlinear analysis method. The fracture modes, Von-Mises stresses, vertical load–displacement and load factor–displacement curves, load transferal mechanisms, and other analytical results comparative were reported in detail and discussed for various investigated beam-to-column connections. The analysis results revealed that the overall failure of the samples occurred in the connection region under the catenary action mode at large displacements. Also, the results were verifi ed with available experimental data. Among all investigated connections, the highest stresses could be applied to the sixteen-bolt stiff ened connection, and this sample had the most excellent behavior. In the design of buildings exposed to unusual loads due to progressive collapse, the signifi cant axial force created in the connections should be considered in the design stages of these elements. Also, it is recommended that at least three rows of bolts are embedded in the bottom area of end-plate connections when the structure is at the risk of progressive collapse.

참고문헌 (Reference)

1 Sadek, F., "Testing and analysis of steel and concrete beam-column assemblies under a column removal scenario" 137 (137): 881-892, 2011

2 American Society for Testing and Materials, "Standard test methods and definitions for mechanical testing of steel products"

3 American Institute of Steel Construction, "Specification for structural steel buildings"

4 Fang, C., "Simplified energy-based robustness assessment for steelcomposite car parks under vehicle fire" 49 (49): 719-732, 2013

5 American Institute of Steel Construction, "Seismic provisions for structural steel buildings"

6 Fang, C., "Robustness of multi-storey car parks under vehicle fire" 75 (75): 72-84, 2012

7 Yang, B., "Robustness of bolted-angle connections against progressive collapse: experimental tests of beam-column joints and development of component-based models" 139 (139): 1498-1514, 2012

8 Astaneh-Asl, A., "Progressive collapse resistance of steel building floors" University of California at Berkeley 2001

9 The U.S. General Service Administration, "Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects"

10 American Institute of Steel Construction, "Prequalified connections for special and intermediate steel moment frames for seismic applications"

11 Sadek, F., "Performance of steel moment connections under a column removal scenario. II: analysis" 139 (139): 108-119, 2013

12 Lew, H. S., "Performance of steel moment connections under a column removal scenario. I: Experiments" 139 (139): 98-107, 2013

13 Wang, W., "Performance of practical beam-to-SHS column connections against progressive collapse" 106 (106): 332-347, 2016

14 Zhong, W., "Performance of different stiff-ness connections against progressive collapse" 135 : 162-175, 2017

15 Daneshvar, H., "One side steel shear connection in column removal scenario" University of Alberta 2013

16 Yang, B., "Numerical analyses of steel beamcolumn joints subjected to catenary action" 70 (70): 1-11, 2012

17 American Society of Civil Engineers, "Minimum design loads for buildings and other structures"

18 National Institute of Science and Technology, "Final report on the collapse of the world trade center towers" US Department of Commerce 2005

19 Yang, B., "Experimental tests of different types of bolted steel beam–column joints under a central–column–removal scenario" 54 : 112-130, 2013

20 Qin, X., "Experimental study of through diaphragm connection types under a column removal scenario" 112 (112): 293-304, 2015

21 Li, L., "Experimental investigation of beam-to-tubular column moment connections under column removal scenario" 88 (88): 244-255, 2013

22 Li, L., "Effect of beam web bolt arrangement on catenary behaviour of moment connections" 104 (104): 22-36, 2015

23 Unified facility criteria, "Design of building to resist progressive collapse"

24 Brett, C., "Assessment of robustness of structures:Current state of research" 7 (7): 1-13, 2013

25 Alireza Ch. Salmasi, "Assessment of Eccentrically Braced Frames Strength Against Progressive Collapse" 한국강구조학회 17 (17): 543-551, 2017

26 Meng, B., "Anti-collapse performances of steel beam-to-column assemblies with different span ratios" 140 (140): 125-138, 2018

27 ABAQUS, "Analysis user’s manual. version 6.14"

28 Sadek, F., "An experimental and computational study of steel moment connections under a column removal scenario" National Institute of Standards and Technology 2010

29 Qin, X., "A special reinforcing technique to improve resistance of beam-to-tubular column connections for progressive collapse prevention" 117 (117): 26-39, 2016