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Steel and Composite Structures Volume 56, Number 1, July 10 2025 , pages 67-82 DOI: https://doi.org/10.12989/scs.2025.56.1.067 |
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Effects of semi-rigid behavior on the seismic performance of the precast shear wall with a box-shaped connection joint |
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Quanwei Liu, Tao Wu, Zhengyi Kong, Shen Wang, Ran Cheng and Yingkang Zhou
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| Abstract | ||
| Bolted connections with obvious semi-rigid characteristics will experience additional moments caused by the second-order effects in structures, leading to inferior seismic performance of precast shear walls compared to cast-in-place shear walls. In order to investigate the influence of semi-rigidity, a new box-shaped connection with apparent semi-rigid features has been proposed. Cyclic loading tests were conducted on a full-scale shear wall specimen (BPSW) with a box-shaped connection and a cast-in-place shear wall specimen (SW1). Failure characteristics, seismic performance, and deformation composition were comprehensively analyzed. Test results indicate that that both BPSW and SW1 exhibit the same bending failure mode. The seismic performance, as indicated by the hysteretic envelope area in BPSW, is slightly smaller than that of SW1. The reduced ductility, initial stiffness, and energy dissipation in BPSW can be attributed to the semi-rigid behavior, which affects the deformation behavior of the precast shear wall structure. Additionally, the deformation composition analysis reveals that rotational deformation of the new box-shaped connection in BPSW cannot be ignored as it accounts for more than 30% of the horizontal displacement. In accordance with previous models, a theoretical model for rotational deformation that offers insights into the semi-rigid nature and seismic performance of the box-shaped connection is proposed. The proposed model demonstrates good agreement with experimental results and provides valuable insights into the semi-rigid behavior and seismic response of such precast connections. | ||
| Key Words | ||
| box-shaped connection; cyclic loading test; precast concrete shear wall; seismic performance; semi-rigid behavior | ||
| Address | ||
| Quanwei Liu:Department of Civil Engineering, Anhui University of Technology, China Tao Wu:Department of Civil Engineering, Chang'an University, China Zhengyi Kong:MSCA Fellowship, Institute for Sustainable Built Environment, Heriot-Watt University, United Kingdom Shen Wang:Department of Civil Engineering, Chang'an University, China Ran Cheng:Department of Engineering Management, Inner Mongolia Technical College of Construction, China Yingkang Zhou :Department of Civil Engineering, Anhui University of Technology, China | ||