Experimental study on seismic performance for precast concrete beam to shear link composite joint separation from moment and shear force

被引：0
|
作者：
Hu S. [1 ]
Zhou Q. [1 ]
Zeng S. [2 ,3 ]
Zhi Q. [1 ]
机构：
[1] School of Infrastructure Engineering, Nanchang University, Nanchang
[2] Zhongmei Engineering Group Ltd, Nanchang
[3] Ganzhou Construction Industrialization Co., Ltd, Ganzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷
关键词：
failure mode; hysteresis curve; precast concrete beam; quasi-static test; seismic performance; short shear link;
D O I：
10.14006/j.jzjgxb.2023.S2.0031
中图分类号：
学科分类号：
摘要：
In the prefabricated reinforced concrete-Y shaped eccentrically steel brace structure, the joint between precast concrete beam (PCB) and very short shear link (VSSL) should have enough bearing capacity, so that the damage can be restricted in shear link. In this paper, an innovative precast concrete beam-to-shear link composite joint (PCB-VSSL) with the separation from moment and shear force is proposed. Four PCB-VSSL specimens with different shear connectors and one repaired specimen were studied by the cyclic loading tests, so the failure modes, hysteresis curves, bond curves, secant stiffness, energy dissipation capacity, and strain distribution can be investigated. The test results show that all the VSSL in the specimens has experienced failure mode of web yield, web and flange buckling, web crack, flange crack, and fracture. The maximum overstrength and inelastic rotation of the specimens are 1. 85 and 0. 15, respectively, which are the same as the VSSL specimen. The damage of PCB can be effectively avoided by increasing the size of shear connectors. The repaired process of PCB-VSSL can be limited to 45 min, and the repaired specimen still has good seismic performance. In addition, in the PCB-VSSL, the high-strength bolts can only carry moment, and shear connectors can only carry shear force, so the moment and shear force of the innovative PCB-VSSL with the advantage of high bearing capacity, ease of installation and seismic resilience capacity can be apparently separated. © 2023 Science Press. All rights reserved.
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页码：315 / 323
页数：8
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