Seismic Collapse Prevention Performance of Low-Ductility CBFs
Publication: Earth and Space 2021
ABSTRACT
Low-ductility steel concentrically braced frame (CBF) buildings are considered to have reserve capacity after brace failure. This study proposes a series of shake table tests of a scaled two-bay, three-story, moment-resisting frame model with a pair of square hollow section braces placed in a chevron arrangement to examine its dynamic behavior. The model structure was repeatedly subjected to two earthquake records with successively increasing magnitudes. The failure mechanisms, reserve capacity, and overall collapse performance were investigated. The results show that the reserve system is sensitive to spectral characteristics of ground motions, especially for soft soil site ground motions.
Get full access to this article
View all available purchase options and get full access to this chapter.
REFERENCES
ASCE (American Society of Civil Engineers). (2010) Minimim design loads for buildings and other structures, Standard ASCE/SEI 7-10. Third printing. ASCE, Reston, VA.
Bradley, C. R., Fahnestock, L. A., Hines, E. M., and Sizemore, J. G. (2017). “Full-scale cyclic testing of low-ductility concentrically braced frames.” J. Struct. Eng., 04017029.
Hines, E. M., Appel, M. E., and Cheever, P. J. (2009). “Collapse performance of low-ductility chevron braced steel frames in moderate seismic regions.” AISC Eng. J., 46(3), 149-180.
Hines, E., Baise, L., and Swift, S. (2010). “Ground-motion suite selection for eastern North America.” J. Struct. Eng., 137(3), 358-366.
Li, G., Dong, Z.-Q., and Li, H.-N. (2018). “Simplified collapse prevention evaluation for the reserve system of low-ductility steel concentrically braced frames.” J. Struct. Eng., 144(7), 04018071.
Li, G., Dong, Z.-Q., Li, H.-N., and Yang, Y.-B. (2017). “Seismic collapse analysis of concentrically-braced frames by the IDA method.” Adv. Steel Constr., 13(3), 273-293.
Li, G., and Fahnestock, L. A. (2013a). “Seismic response of single-degree-of-freedom systems representing low-ductility steel concentrically-braced frames with reserve capacity.” J. Struct. Eng., 139(2), 199-211.
Li, G., Fahnestock, L. A., and Li, H.-N. (2013b). “Simulation of steel brace hysteretic response using the force analogy method.” J. Struct. Eng., 139(4), 526-536.
Sizemore, J., Fahnestock, L. A., and Hines, E. M. (2019). “Seismic performance assessment of low-ductility concentrically braced frames.” J. Struct. Eng., 145(4), 04019016.
Sizemore, J. G., Fahnestock, L. A., Hines, E. M., and Bradley, C. R. (2017). “Parametric Study of low-ductility concentrically braced frames under cyclic static loading.” J. Struct. Eng., 143(6), 04017032.
Information & Authors
Information
Published In
Earth and Space 2021
Pages: 337 - 343
Copyright
© 2021 American Society of Civil Engineers.
History
Published online: Apr 15, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.