Design and Testing of an Enhanced-Elongation Telescoping Self-Centering Energy-Dissipative Brace
Publication: Journal of Structural Engineering
Volume 141, Issue 6
Abstract
The self-centering energy-dissipative (SCED) brace is a new steel bracing member that provides both damping and recentering capability to a structure, while reducing or eliminating residual building deformations after major seismic events. Previous SCED brace designs exhibited full self-centering capability over frame lateral deformations ranging from 1.5 to 2.0% of a typical building story height owing to the elongation capacity of the tendons comprising the system. To overcome this limitation, a new enhanced-elongation telescoping SCED (T-SCED) brace has been developed that allows for self-centering response over two times the range achieved with the original SCED bracing system. A prototype design of this proposed system was fabricated and tested quasi-statically and dynamically in a full-scale vertical steel frame. It exhibited full self-centering behavior in a single story frame that was laterally deformed to 4% of its story height. This new T-SCED brace also satisfied standard testing protocols for buckling restrained braces.
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Acknowledgments
Financial support for this project was provided by the Natural Sciences and Engineering Research Council of Canada under the Idea to Innovation (I2I) program. The authors would also like to acknowledge the assistance provided by the staff of the structural engineering laboratory at the University of Toronto.
References
AISC. (2005). “Seismic provisions for structural steel buildings, including supplement no. 1.” ANSI/AISC 341s1-05, Chicago.
ASCE. (2005). “Minimum design loads for buildings and other structures, including supplement no. 1.” ANSI/SEI7-05, Reston, VA.
Choi, H., Erochko, J., Christopoulos, C., and Tremblay, R. (2009). “Seismic response of 2D and 3D buildings incorporating buckling-restrained and self-centering bracing systems.” Behaviour of steel structures in seismic areas, F. Mazzolani, J. Ricles, and R. Sause, eds., CRC Press, Leiden, NL.
Chou, C.-C., and Chen, Y.-C. (2012). “Development and seismic performance of steel dual-core self-centering braces.” Proc., 15th World Conf. on Earthquake Engineering, Sociedade Portuguesa de Engenharia Sísmica, Lisbon, Portugal.
Christopoulos, C., Filiatrault, A., and Folz, B. (2002). “Seismic response of self-centring hysteretic SDOF systems.” Earthquake Eng. Struct. Dyn., 31(5), 1131–1150.
Christopoulos, C., Tremblay, R., Kim, H.-J., and Lacerte, M. (2008). “Self-centering energy dissipative bracing system for the seismic resistance of structure: Development and validation.” J. Struct. Eng., 96–107.
Erochko, J. (2013). “Improvements to the design and use of post-tensioned self-centering energy-dissipative (SCED) braces.” Ph.D. thesis, Univ. of Toronto, Toronto, Canada.
Erochko, J., Christopoulos, C., and Tremblay, R. (2011). “Residual drift response of SMRFs and BRB frames in steel buildings designed according to ASCE 7-05.” J. Struct. Eng., 589–599.
Erochko, J., Christopoulos, C., and Tremblay, R. (2013a). “Detailed component modelling of a self-centering energy-dissipative brace system.” Proc., COMPDYN 2013: 4th ECCOMAS Thematic Conf. on Computational Methods in Structural Dynamics and Earthquake Engineering, M. Papadrakakis, V. Papadopoulos, and V. Plevris, eds., Institute of Structural Analysis and Antiseismic Research, Athens, Greece.
Erochko, J., Christopoulos, C., Tremblay, R., and Kim, H. J. (2013b). “Shake table testing and numerical simulation of a self-centering energy dissipative braced frame.” Earthquake Eng. Struct. Dyn., 42(11), 1617–1635.
Filiatrault, A., Restrepo, J., and Christopoulos, C. (2004). “Development of self-centering earthquake resisting systems.” Proc., 13th World Conf. on Earthquake Eng., Canadian Association for Earthquake Engineering (CAEE), Vancouver, Canada.
Filiatrault, A., Tremblay, R., and Kar, R. (2000). “Performance evaluation of friction spring seismic damper.” J. Struct. Eng., 491–499.
Kammula, V., Erochko, J., Kwon, O. S., and Christopoulos, C. (2014). “Application of hybrid-simulation to fragility assessment of the telescoping self-centering energy dissipative bracing system.” Earthquake Eng. Struct. Dyn., 43(6), 811–830.
MacRae, G. A., and Kawashima, K. (1997). “Post-earthquake residual displacements of bilinear oscillators.” Earthquake Eng. Struct. Dyn., 26(7), 701–716.
McCormick, J., Aburano, H., Ikenaga, M., and Nakashima, M. (2008). “Permissible residual deformation levels for building structures considering both safety and human elements.” Proc., 14th World Conf. Earthquake Engineering, Chinese Association of Earthquake Engineering, Harbin, China.
Nims, D. K., Richter, P. J., and Bachman, R. E. (1993). “The use of the energy dissipating restraint for seismic hazard mitigation.” Earthquake Spectra, 9(3), 467–489.
Pampanin, S., Christopoulos, C., and Priestley, M. J. N. (2003). “Performance-based seismic response of frame structures including residual deformations. Part II: Multi-degree of freedom systems.” J. Earthquake Eng., 7(1), 119–147.
Ruiz-Garcia, J., and Miranda, E. (2006). “Residual displacement ratios for assessment of existing structures.” Earthquake Eng. Struct. Dyn., 35(3), 315–336.
Seo, C.-Y., and Sause, R. (2005). “Ductility demands on self-centering systems under earthquake loading.” ACI Struct. J., 102(2), 275–285.
Tremblay, R., and Atkinson, G. M. (2001). “Comparative study of the inelastic seismic demand of eastern and western Canadian sites.” Earthquake Spectra, 17(2), 333–358.
Tremblay, R., Lacerte, M., and Christopoulos, C. (2008). “Seismic response of multistory buildings with self-centering energy dissipative steel braces.” J. Struct. Eng., 108–120.
Tsopelas, T., and Constantinou, M. C. (1994). “Experimental and analytical study of a system consisting of sliding bearings and fluid restoring force/damping devices.”, Dept. of Civil Engineering, State Univ. of New York at Buffalo, Buffalo, NY.
Zhu, S., and Zhang, Y. (2007). “Seismic behavior of self-centering braced frame buildings with reusable hysteretic damping brace.” Earthquake Eng. Struct. Dyn., 36(10), 1329–1346.
Zhu, S., and Zhang, Y. (2008). “Seismic analysis of concentrically braced frame systems with self-centering friction damping braces.” J. Struct. Eng., 121–131.
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© 2014 American Society of Civil Engineers.
History
Received: Apr 10, 2013
Accepted: May 6, 2014
Published online: Aug 6, 2014
Discussion open until: Jan 6, 2015
Published in print: Jun 1, 2015
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