钢管橡胶集料混凝土短柱轴压性能的试验研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2191-2199.

钢管橡胶集料混凝土短柱轴压性能的试验研究

邢浩然¹, 毛念东¹, 杨欣然¹, 周知^2,3, 黄维^1,2

1.武汉理工大学理学院,武汉 430070;
2.武汉理工大学,新材料力学理论与应用湖北省重点实验室,武汉 430070;
3.武汉理工大学交通学院,武汉 430070

收稿日期:2021-03-02 修回日期:2021-04-08 出版日期:2021-07-15 发布日期:2021-08-04
通讯作者: 黄维,博士,副教授。E-mail:whuang@whut.edu.cn
作者简介:邢浩然(2000—),男。主要从事混凝土材料及结构力学性能研究。E-mail:949811416@qq.com
基金资助:
国家自然科学基金(51974217);中央高校基本科研业务费专项基金项目(2020IB014);新材料力学理论与应用湖北省重点实验室开放基金(WUT-TAM202105)

Axial Compression Performance of Rubberized Concrete-Filled Steel Tube Short Columns

XING Haoran¹, MAO Niandong¹, YANG Xinran¹, ZHOU Zhi^2,3, HUANG Wei^1,2

1. School of Science, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei key Laboratory of Mechanics Theory and Application New Materials, Wuhan University of Technology, Wuhan 430070, China;
3. School of Transportation, Wuhan University of Technology, Wuhan 430070, China

Received:2021-03-02 Revised:2021-04-08 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 为解决橡胶集料混凝土强度和弹性模量过低所导致的工程使用局限性,本文以橡胶集料等体积替换细骨料,制备12根圆钢管橡胶集料混凝土短柱组合构件并完成轴心受压试验。试验结果表明:与普通混凝土相比,核心橡胶集料混凝土对钢管的侧向约束作用减弱,钢管更容易发生局部屈曲破坏;组合构件的轴压承载力随着橡胶集料替换率的增加而降低,但其延性性能提升明显,采用相同钢管厚度的钢管橡胶集料混凝土短柱轴向荷载-位移曲线在峰值后更易出现强化段。最后采用欧洲Eurocode 4、美国AISC 360—2005和中国GB 50936—2014规范计算了各组合短柱的轴压承载力,并与试验结果进行对比发现:美国AISC 360—2005和中国GB 50936—2014计算结果过于保守,误差较大;而考虑约束效应的欧洲Eurocode 4规范计算结果与实测结果吻合较好。

关键词: 钢管混凝土柱, 橡胶集料混凝土, 轴压试验, 局部屈曲, 约束效应, 轴压承载力

Abstract: In order to solve the limitation of engineering application of rubberized concrete caused by its lower strength and elastic modulus, 12 rubberized concrete-filled steel tube (RuCFST) columns, in which waste tire rubber was used to replace fine aggregate by the same volume, were fabricated and tested under axial compression in this paper. The test results show that the steel tube of RuCFST columns is more prone to local buckling and RuCFST columns exhibit lower axial compressive capacity and higher ductility than normal CFST columns. RuCFST columns demonstrate hardening post-peak response, compared with normal CFST columns with the same steel tube thickness. Finally, the axial compressive capacity of RuCFST columns was investigated by AISC 360—2005, Eurocode 4 and GB 50936—2014 codes. The results show that the predictions of the axial compressive capacity of RuCFST columns by AISC 360—2005 and GB 50936—2014 are conservation and Eurocode 4 provides the most accurate results compared with the test results.

Key words: concrete-filled steel tube short column, rubberized concrete, axial compression test, local buckling, effect of restraint, axial compressive capacity

中图分类号:

邢浩然, 毛念东, 杨欣然, 周知, 黄维. 钢管橡胶集料混凝土短柱轴压性能的试验研究[J]. 硅酸盐通报, 2021, 40(7): 2191-2199.

XING Haoran, MAO Niandong, YANG Xinran, ZHOU Zhi, HUANG Wei. Axial Compression Performance of Rubberized Concrete-Filled Steel Tube Short Columns[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2191-2199.

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