Earthquakes and Structures

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Effect of vertical reinforcement connection level on seismic behavior of precast RC shear walls: Experimental study

  • Yun-Lin Liu (Prefabricated Building Research Institute of Anhui Province, Anhui Jianzhu University) ;
  • Sushil Kumar (Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University) ;
  • Dong-Hua Wang (Prefabricated Building Research Institute of Anhui Province, Anhui Jianzhu University) ;
  • Dong Guo (School of Civil Engineering, Guangzhou University)
  • Received : 2024.01.16
  • Accepted : 2024.04.09
  • Published : 2024.06.25
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Abstract

The vertical reinforcement connection between the precast reinforced concrete shear wall and the cast-in-place reinforced concrete member is vital to the performance of shear walls under seismic loading. This paper investigated the structural behavior of three precast reinforced concrete shear walls, with different levels of connection (i.e., full connection, partial connection, and no connection), subjected to quasi-static lateral loading. The specimens were subjected to a constant vertical load, resulting in an axial load ratio of 0.4. The crack pattern, failure modes, load-displacement relationships, ductility, and energy dissipation characteristics are presented and discussed. The resultant seismic performances of the three tested specimens were compared in terms of skeleton curve, load-bearing capacity, stiffness, ductility, energy dissipation capacity, and viscous damping. The seismic performance of the partially connected shear wall was found to be comparable to that of the fully connected shear wall, exhibiting 1.7% and 3.5% higher yield and peak load capacities, 9.2% higher deformability, and similar variation in stiffness, energy dissipation capacity and viscous damping at increasing load levels. In comparison, the seismic performance of the non-connected shear wall was inferior, exhibiting 12.8% and 16.4% lower loads at the yield and peak load stages, 3.6% lower deformability, and significantly lower energy dissipation capacity at lower displacement and lower viscous damping.

Keywords

Acknowledgement

This work described in paper is supported by the Anhui Natural Science Foundation (Project 1908085ME144), Anhui Provincial Universities Natural Science Research Project (Grant No. KJ2020ZD43), the Anhui University Natural Science Foundation (Project KJ2021A0607) and the Anhui Jianzhu University doctor start-up fund (Project 2020QDZ170). National Natural Science Foundation of China (Project Nos. 52178278), the Department of Education of Guangdong Province, China (Project No. 2021KCXTD030). The authors would also like to acknowledge the assistance of Hao Pan, Xudong Chen of Anhui Jianzhu University, who helped to conduct the experiments.

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