|Table of Contents|

Stress Redistribution of Shear Wall Structure with Replacement Reinforcement(PDF)

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

Issue:
2020年05期
Page:
132-141
Research Field:
Publishing date:

Info

Title:
Stress Redistribution of Shear Wall Structure with Replacement Reinforcement
Author(s):
LEI Tuo1;  LIU Yi1;  LI Kun1;  JIANG Dong-qi2;  DONG Jun-feng3
1. School of Civil Engineering, Chang’an University, Xi’an 710061, Shaanxi, China; 2. Department of Civil Engineering, Nanjing University of Science & Technology, Nanjing 210094, Jiangsu, China; 3. Shaanxi Architecture Science Research Institute Co.,
Keywords:
shear wall;  replacement reinforcement;  construction monitoring;  life and death element method;  stress redistribution;  compression bearing capacity
PACS:
TU375
DOI:
10.19815/j.jace.2020.05026
Abstract:
In order to reveal the stress variation law of shear wall during the reinforcement process of unsupported replacement concrete, the whole process monitoring of a shear wall residential building without support replacement reinforcement was carried out. Based on ABAQUS finite element analysis software, the whole process of shear wall construction was simulated by using life and death element, equivalent temperature rise and field variables. Combined with construction monitoring data and finite element simulation results, the stress change process of replacement shear wall, beam and floor connected with replacement shear wall was analyzed. Finally, the calculation method of the normal section bearing capacity of the unsupported segmental replacement wall was given after considering the stress redistribution. The results show that the finite element simulation method can effectively simulate the construction process of concrete without support replacement reinforcement. Due to the sectional demolition and replacement of shear wall, stress redistribution occurs in the wall, and the degree of stress redistribution is related to the construction sequence of wall segments. Stress redistribution will cause stress concentration at the wall opening, but the stress concentration has little effect on the reinforcement effect. At the same time, it will also affect the stress of coupling beam and floor structure adjacent to the replacement shear wall, resulting in the increase of stress. It is suggested that it is necessary to control the influence of stress redistribution through sectional optimization design and compression bearing capacity recheck when strengthening shear wall structure without support.

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Last Update: 2020-10-15