Failure Analysis of Welded Steel Moment-Resisting Frame Connections
Publication: Journal of Materials in Civil Engineering
Volume 14, Issue 1
Abstract
Full-scale welded steel moment-resisting frame (WSMF) connections have been tested to failure at the University of Michigan and at Lehigh University. The tests were conducted at ambient temperature and under a simulated seismic loading protocol developed by the SAC Joint Venture, to determine if newly detailed unreinforced fully restrained post-Northridge connections can behave satisfactorily in future earthquakes. This paper presents a failure analysis of 16 full-scale WSMF connections. The effects of weld-access hole geometry and the roughness of its flame-cut surface are analyzed. The analysis describes the initiation and propagation of fatigue cracks at intersections of the weld access hole with the beam flange and from the flame-cut surface of the weld access hole in the WSMF connections. The paper suggests changes to the weld access hole, and the surface roughness for the flame-cut surface of the weld access hole, which would improve the performance of unreinforced post-Northridge WSMF connections subjected to seismic loads.
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References
American Institute for Steel Construction (AISC). (1993). Load and resistance factor design specification for structural steel buildings, Chicago.
American Institute for Steel Construction (AISC). (1997). Seismic provisions for structural steel buildings, Chicago.
American Welding Society (AWS). (2000). “Structural welding code—steel.” ANSI/AWS D1.1-2000, Miami.
Barsom, J. M., and Pellegrino, J. V., Jr. (2000a). “Failure analysis of welded steel moment-resisting frame connections. I: Unreinforced post-Northridge welded steel moment frame connections.” SAC Steel Project—Task 7.1.3, SAC Joint Venture, Richmond, Calif.
Barsom, J. M., and Pellegrino, J. V., Jr. (2000b). “Failure analysis of welded steel moment-resisting frame connections. II: Unreinforced pre-Northridge welded steel moment connections.” SAC Steel Project—Task 7.1.3, SAC Joint Venture, Richmond, Calif.
Barsom, J. M., and Rolfe, S. T. (1999). Fracture and fatigue control in structures—applications of fracture mechanics, 3rd Ed., ASTM, West Conshohocken, Pa.
Federal Emergency Management Agency (FEMA). (1995). “Interim guidelines: evaluation, repair, modification and design of welded steel moment frame structures.” FEMA 267, Washington, D.C.
Goel, S. C., et al. (1999). “Parametric tests on unreinforced connections.” SAC Steel Project—Task 7.023, SAC Joint Venture, Richmond, Calif.
Ricles, J. M., et al. (2000). “Supplemental testing of unreinforced connections with integration of T-stub weld tests and analysis.” SAC Steel Project—Task 7.05, SAC Joint Venture, Richmond, Calif.
Ryffel, H. H., Green, R. E., and Geronimo, J. H., eds. (1988). Machinery’s Handbook, 23rd Ed., Industrial, New York.
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Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Sep 11, 2000
Accepted: May 30, 2001
Published online: Feb 1, 2002
Published in print: Feb 2002
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