Seismic Performance of a New Type of Reinforced Concrete Energy Dissipation Structure
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2226-0
Structural Engineering
Seismic Performance of a New Type of Reinforced Concrete Energy Dissipation Structure Penghui Yanga and Xingwen Lianga a
College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
ARTICLE HISTORY
ABSTRACT
Received 5 December 2019 Accepted 19 May 2020 Published Online 31 July 2020
High-performance fiber-reinforced concrete (HPFRC) is an ideal energy dissipation material because of its high tensile ductility and multiple fine-crack development. An HPFRC energy dissipation wall was installed in a reinforced concrete (RC) frame to form a new RC frame– HPFRC energy dissipation wall aseismic structure. Two half-scale RC frame–HPFRC energy dissipation wall specimens were designed and constructed. Quasi-static tests were performed to study the failure mechanism, deformation performance, stiffness degradation, and energy dissipation performance. The effective stiffness of the RC frame–HPFRC energy dissipation wall at the peak load was analyzed. The test results indicate that RC frame–HPFRC energy dissipation wall structures can achieve the seismic fortification objective of being “repairable after major earthquake”. Compared with the RC frame with one energy dissipation wall, the lateral load capacity of the frame with two energy dissipation walls was improved by 38.3%, and the initial lateral stiffness increased by 1.78 times, while the post yield lateral stiffness increased by only 20% to 30%; the energy dissipation capacity at different damage states increased by 10% to 175%, while the lateral deformation capacity was basically the same. The energy dissipation mechanism of the RC frame–HPFRC energy dissipation wall structure includes the energy dissipation caused by the deformation of the wall, the slipping at the connections of the upper and lower ends of the wall with the frame beams, and the deformation of the RC frame. The effective stiffness coefficients of the RC frame and the HPFRC energy dissipation wall at the peak load are 0.11 and 0.13, respectively.
KEYWORDS High-performance fiber-reinforced concrete Energy dissipation wall Quasi-static test Failure mechanism Effective stiffness
1. Introduction Reinforced concrete (RC) frame structures are widely used in multistory and high-rise building structures. However, the effects of multiple strong earthquakes have caused some RC frame structures to suffer serious damage or even collapse (Sezen et al., 2003; Gautam and Chaulagain, 2016; Joaquín et al., 2016; Alih and Vafaei, 2019). Thus, numerous researchers have used energy dissipation braces to reinforce RC frame structures and have demonstrated their effectiveness through experiments (Ghobarah and Abou Elfath, 2001; Youssef et al., 2007; André et al., 2017; Tahamouli-Roudsari et al., 2017). Energy dissipation braces or steel braces in an RC frame structure can effectively improve the seismic performance and mitigate the post earthquake damage; however, the c
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