Research on Application of Buckling Restrained Braces in Strengthening of Concrete Frame Structures
Abstract
This paper examines the application of BRB in strengthening of reinforced concrete frame structures to meet seismic requirements according to Chinese seismic design code. Elastic response spectrum analysis and nonlinear time history analysis are performed by taking a real engineering example that suffers weak first floor irregularity due to added loads and addition of one floor. With the method of equivalent stiffness and displacement-based design method, buckling restrained brace parameters are deduced and are used to model BRB in ETABS using plastic wen model. Three configurations of buckling restrained braces are studied together with ordinary braces. Under elastic state, the relationship between the required cross section area of BRB and ordinary braces is deduced from the formula of calculating elastic bearing capacity where it is shown that the area of the ordinary braces must be 1.25 times that of BRB for ensuring the same performance. The results show that Inverted V brace configuration demonstrated better performance over single brace and V brace configurations and X brace configuration, although not recommended by Chinese code, is simulated and used in this paper and has demonstrated better performance over other configurations, and the further research on the practical use of this brace is recommended. Also, under action of strong earthquakes, by nonlinear time history analysis, buckling restrained braces demonstrated better performance of strengthening the structure and make it meet the requirement of code. Under this same condition, ordinary braces losses their bearing capacity due to excessive buckling.
Keywords
References
Xie, Furen, Hongyan Zhang, and Yi Du. “The Recent Tectonic Stress Districts and Strong Earthquakes in China.” Rock Stress and Earthquakes (July 29, 2010): 35–40. doi:10.1201/9780415601658-7.
Almeida, André, Ricardo Ferreira, Jorge M. Proença, and António S. Gago. “Seismic Retrofit of RC Building Structures with Buckling Restrained Braces.” Engineering Structures 130 (January 2017): 14–22. doi:10.1016/j.engstruct.2016.09.036.
Li, Zhong-Jun. “Research on Steel Structures Design Method Using Energy Dissipation Brace for Story Lateral Ductility Ratio Control.” Modeling and Computation in Engineering II (May 22, 2013): 141–147. doi:10.1201/b14896-22.
Kumar, P.C. Ashwin, Dipti Ranjan Sahoo, and Abhay Kumar. “Seismic Response of Concentrically Braced Frames with Staggered Braces in Split-x Configurations.” Journal of Constructional Steel Research 142 (March 2018): 17–30. doi:10.1016/j.jcsr.2017.12.005.
Kim, Jinkoo, and Hyunhoon Choi. “Behavior and Design of Structures with Buckling-Restrained Braces.” Engineering Structures 26, no. 6 (May 2004): 693–706. doi:10.1016/j.engstruct.2003.09.010.
Wei, Hsi-Hsien, Igal M. Shohet, Mirosław J. Skibniewski, Stav Shapira, Robert Levy, Tsafrir Levi, Amos Salamon, and Moti Zohar. “Assessment of Casualty and Economic Losses from Earthquakes Using Semi-Empirical Model.” Procedia Engineering 123 (2015): 599–605. doi:10.1016/j.proeng.2015.10.113.
Nigg, Joanne M. “Anticipated Business Disruption Effects Due to Earthquake-Induced Lifeline Interruptions.” Post-Earthquake Rehabilitation and Reconstruction (1996): 47–57. doi:10.1016/b978-008042825-3/50008-9.
Guo, Yan-Lin, Jing-Zhong Tong, Xiao-An Wang, and Peng Zhou. “Subassemblage Tests and Design of Steel Channels Assembled Buckling-Restrained Braces.” Bulletin of Earthquake Engineering 16, no. 9 (February 22, 2018): 4191–4224. doi:10.1007/s10518-018-0337-5.
Naghavi, Mohammad, Rohola Rahnavard, Robert J. Thomas, and Mohsen Malekinejad. “Numerical Evaluation of the Hysteretic Behavior of Concentrically Braced Frames and Buckling Restrained Brace Frame Systems.” Journal of Building Engineering 22 (March 2019): 415–428. doi:10.1016/j.jobe.2018.12.023.
Mazzolani, Federico M., Gaetano Della Corte, and Mario D’Aniello. “Experimental Analysis of Steel Dissipative Bracing Systems for Seismic Upgrading.” Journal of Civil Engineering and Management 15, no. 1 (March 31, 2009): 7–19. doi:10.3846/1392-3730.2009.15.7-19.
Kasai, Kazuhiko, Yoji Ooki, Shojiro Motoyui, Toru Takeuchi, and Eiji Sato. “E-Defense Tests on Full-Scale Steel Buildings: Part 1 - Experiments Using Dampers and Isolators.” Structural Engineering Research Frontiers (October 10, 2007). doi:10.1061/40944(249)17.
Guerrero, Hector, Tianjian Ji, J. Alberto Escobar, and Amador Teran-Gilmore. “Effects of Buckling-Restrained Braces on Reinforced Concrete Precast Models Subjected to Shaking Table Excitation.” Engineering Structures 163 (May 2018): 294–310. doi:10.1016/j.engstruct.2018.02.055.
Almeida, André, Ricardo Ferreira, Jorge M. Proença, and António S. Gago. “Seismic Retrofit of RC Building Structures with Buckling Restrained Braces.” Engineering Structures 130 (January 2017): 14–22. doi: 10.1016/j.engstruct.2016.09.036.
Gao, Er Xin, and Yong Gui Wang. “Seismic Performance Study on Buckling-Restrained Brace.” Applied Mechanics and Materials 353–356 (August 2013): 2101–2104. doi:10.4028/www.scientific.net/amm.353-356.2101.
Ikhouane F., Rodellar J., “Variation of the Hysteresis Loop with the Bouc–Wen Model Parameters.” Systems with Hysteresis (2007): 63–111. doi:10.1002/9780470513200.ch4.
LI Hong-guang, HE Xu, MENG Guang, “Numerical Simulation for Dynamic Characteristics of Bouc-Wen Hysteretic System, “Journal of system simulation, vol. 16, pp. 2009–2011, (2016, Sep). (in Chinese).
Tanuwidjaja, H.R., E.E. Tanuwidjaja, and G.K. Santoso. “An ETABS Study on Linearly Dynamic Analysis.” Proceedings of the Twelfth International Conference on Computational Structures Technology (2014). doi:10.4203/ccp.106.43.
DOI: 10.28991/cej-2020-03091475
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