RESEARCH ARTICLE


Research on Seismic Performance of Reinforced Concrete Frame with Unequal Span Under Low Cyclic Reversed Loading



Wang Lai1, *, Xuan Wei1, Feng Ning-ning2, Cong Shuping1, Liu Feng1, Gao Qiumei1
1 Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation , Shandong University of Science and Technology, Qingdao 266590, China
2 College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China


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Creative Commons License
© Lai et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address to correspondence to this author at Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology Qingdao 266590, China; Tel: (86)13789879265; E-mail: wlkdtjxy@sina.com


Abstract

In order to investigate the seismic performance of reinforced concrete frame with unequal span, a specimen was tested under low-cyclic loading and the seismic performance of this frame was analyzed based on fiber element method using software OpenSees. Hysteretic curves, skeleton curves, ductility, stiffness degradation and energy dissipating capacity of the frame are compared and analyzed. The experimental and simulate results demonstrate that this frame has a poor seismic performance. Thus, it is suggested that the seismic strengthening criteria of unequal-span frame structure should be raised and the existing buildings of this structure should be retrofitted.

Keywords: Ductility, energy dissipation , hysteresis analysis, low cyclic loading test, OpenSees numerical simulation, reinforced concrete frame, skeleton curve, stiffness degradation.