Study on bearing capacity of RC columns strengthened by steel wire strand meshes-ECC under small eccentric compression

被引：0

作者：

Zhao Y. ^{[1
]}

Wang X. ^{[2
]}

Li K. ^{[2
]}

机构：

[1] School of Civil Engineering, Dalian University of Technology, Dalian

[2] School of Civil Engineering, Zhengzhou University, Zhengzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 10期

关键词：

reinforced concrete column; small eccentric compressive performance; static test; steel wire strand meshes-ECC composites;

D O I：

10.14006/j.jzjgxb.2022.0461

中图分类号：

学科分类号：

摘要：

In order to solve the problem of brittle damage of RC columns under small load eccentricity in practical engineering, steel wire strand (SWS) meshes-engineered cementitious composite (ECC) was applied to the strengthening of reinforced concrete (RC) columns, and the behavior of the strengthened RC columns under small eccentric compression was studied experimentally and theoretically. The influences of reinforcement method, eccentricity and longitudinal SWS reinforcement ratio on the small eccentric compressive performance of the strengthened RC columns were studied. The results indicate that the core concrete is effectively confined by the SWS meshes-ECC composite reinforcement layer, and the cracking load, peaking load and ductility of the strengthened RC columns are increased by 100. 0%-113. 3%, 99. 8%-108. 0% and 75. 9%-77. 8%, respectively. RC columns strengthened by SWS meshes-ECC composites have obvious advantages over the column strengthened by ECC. With the increase of load eccentricity, the cracking load and peaking load decrease, but the ductility is improved, and the longitudinal SWS reinforcement ratio has a relatively small effect. Based on the test results, a formula was proposed to calculate the bearing capacity of RC columns strengthened by SWS meshes-ECC composites, and the calculation results agreed well with the test results with the ratio of the calculated value to the experimental value being about 0. 94. © 2023 Science Press. All rights reserved.

引用

页码：188 / 196

页数：8

共 27 条

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