Local Buckling of RBS Beams Subjected to Cyclic Loading
Publication: Journal of Structural Engineering
Volume 135, Issue 12
Abstract
This paper presents an analytical study of local instability behavior in a reduced beam section (RBS) beam subjected to cyclic loading. A general finite-element method is used for numerical experiments here. Even though lateral instability in the RBS beam is prevented, strength deterioration may occur due to local buckling of the RBS portion. The writers suggest that stiffeners arranged in the RBS portion can delay the occurrence of local buckling. To address the possibility that reinforcement of the RBS portion might offset the advantage of RBS, the stress distribution of beam end of the RBS with stiffeners was compared to that of an RBS beam without stiffeners. Stiffening the RBS portion did not cause an excessive stress concentration. These analyses suggest that an RBS beam can be sufficiently strengthened by placing two stiffeners at the boundaries that divide the RBS portion into three equal regions and the stiffener thickness required is the same thickness as the web.
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Acknowledgments
The writers are grateful to Dr. Liu Dawei of Central Research Laboratory, UNSPECIFIEDDaiwa House Industry Co., Ltd. for providing helpful information about the numerical analysis. The writers acknowledge Dr. Makoto Muramoto of Kochi National College of Technology for discussing this paper with them.
References
AISC. (2005a). “Seismic provisions for structure steel buildings.” ANSI/AISC 341-5, Chicago.
AISC. (2005b). “Prequalified connections for special and intermediate steel moment frames for seismic applications.” ANSI/AISC 358-05, Chicago.
Chi, B., and Uang, C. M. (2002). “Cyclic response and design recommendations reduces beam section moment connections with deep columns.” J. Struct. Eng., 128(4), 464–473.
Engelhardt, M. D. (1999). “Design of reduced beam section moment connections.” Proc., Processing North American Steel Construction Conf., AISC, Chicago.
Engelhardt, M. D., and Sabol, T. A. (1997). “Seismic-resistant steel moment connections developments since the 1994 Northridge earthquake.” Prog. Struct. Eng. Mater., 1(1), 68–77.
Engelhardt, M. D., and Sabol, T. A. (1998). “Reinforcing of steel moment connections with cover plates: Benefits and limitations.” Eng. Struct., 20(4–6), 510–520.
Engelhardt, M. D., Winneberger, T., Zekany, A. J., and Potyraj, T. J. (1998). “Experimental investigation of dogbone moment connections.” Eng. J., 35(4), 128–139.
FEMA. (2000). “Recommended seismic design criteria for new steel moment-frame buildings.” FEMA 350, Washington, D.C.
Jones, S. L., Fry, G. T., and Engelhardt, M. D. (2002). “Experimental evaluation of cyclically loaded reduces beam section moment connections.” J. Struct. Eng., 128(4), 441–451.
Lee, C. H., Jeon, S. W., Kim, J. H., and Uang, C. M. (2005). “Effects of panel zone strength and beam web connection method on seismic performance of reduced beam section steel moment connections.” J. Struct. Eng., 131(12), 1854–1865.
Lee, C. H., and Uang, C. M. (2001). “Analytical modeling and seismic design of steel moment connections with welded straight haunch.” J. Struct. Eng., 127(9), 1028–1035.
Nakashima, M., Kanao, I., and Liu, D. (2002). “Lateral instability and lateral bracing of steel beams subjected to cyclic loading.” J. Struct. Eng., 128(10), 1308–1316.
Uang, C. M., and Fan, C. C. (2001). “Cyclic stability criteria for steel moment connections with reduced beam section.” J. Struct. Eng., 127(9), 1021–1027.
Uang, C. M., Yu, Q. S. K., Noel, S., and Gross, J. (2000). “Cyclic testing of steel moment connections rehabilitated with RBS or welded haunch.” J. Struct. Eng., 126(1), 57–68.
Yu, Q. S. K., Uang, C. M., and Gross, J. (2000). “Seismic rehabilitation design of steel moment connection with welded haunch.” J. Struct. Eng., 126(1), 69–78.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 12 • December 2009
Pages: 1491 - 1498
Copyright
© 2009 ASCE.
History
Received: Dec 12, 2007
Accepted: May 4, 2009
Published online: May 6, 2009
Published in print: Dec 2009
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