|Table of Contents|

Experimental Study on Seismic Behavior of L-shape Double-side Precast Composite Shear Walls with Constructional Boundary Elements(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年05期
Page:
47-55
Research Field:
Publishing date:

Info

Title:
Experimental Study on Seismic Behavior of L-shape Double-side Precast Composite Shear Walls with Constructional Boundary Elements
Author(s):
GU Qian1;  YU Gang1;  TAN Yuan2;  ZHAO Duan-feng1;  GAO Hong-yuan3
(1.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China; 2. Myhome Prefabricated Building and Technological Co., Ltd., Wuhan 430071, Hubei, China; 3. Changjiang Institute of Survey, Planning, Design and Research Co., Ltd., Wuhan 430010, Hubei, China)
Keywords:
L-shape double-side precast composite shear wall;  seismic behavior;  pseudo-dynamic test;  constructional boundary element
PACS:
TU375
DOI:
10.19815/j.jace.2021.01010
Abstract:
In order to study the seismic behavior of L-shape double-side precast composite shear walls with constructional boundary element in the superimposed slab shear wall structural system, the pseudo-dynamic test on a full-scale L-shape double-side precast shear wall and a cast-in-place shear wall was completed with the axial compressive ratio 0.2. Through comparative analysis, the seismic behavior of the specimens was evaluated. The results show that composite shear wall and cast-in-place shear wall both present typical bending-shear failure characteristics. When the ultimate failure occurs, the concrete in the bottom area of the boundary element in the web of L-shape shear wall is crushed, and the longitudinal reinforcement is yielded or broken. The positive bending capacity of the flange on the composite shear wall under tension is 14.6% lower than that of the cast-in-place shear wall, while the reverse bending capacity of the flange under compression is 9.2% lower than that of the cast-in-place shear wall. The initial stiffness of the precast composite shear wall is lower than that of the cast-in-place wall under positive loading,and the rate of stiffness degradation after yielding is faster. The initial stiffness of the precast composite shear wall and the law of stiffness degradation after yielding under negative loading are basically the same as those of the cast-in-place shear wall. The joint between the L-shape cast-in-place constructional boundary element and composite wall connected with additional steel bar has good force transmission performance. The seismic performance of L-shape double-side composite shear wall is not as good as the cast-in-place wall, it is suggested that the reinforcement ratio of the constructional boundary elements should be increased.

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Last Update: 2021-09-01