矩形FRP-钢复合管混凝土短柱的轴压试验研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (12): 47-51.

矩形FRP-钢复合管混凝土短柱的轴压试验研究

魏洋^1,2*, 李国芬², 端茂军²

1.江苏省结构工程重点实验室,苏州 215011;
2.南京林业大学土木工程学院,南京 210037

收稿日期:2014-05-19 出版日期:2014-12-28 发布日期:2021-09-13
作者简介:魏洋(1978-),男,博士,副教授,主要从事复合材料及其在土木工程中的应用研究,wy78@njfu.edu.cn
基金资助:
国家自然科学基金(51208262);江苏省结构工程重点实验室资助课题(ZD1005);江苏高校优势学科建设工程资助项目(PAPD);住房和城乡建设部科学技术项目(2011-K2-9)

EXPERIMENTAL STUDY ON RECTANGULAR CONCRETE-FILLED FRP-STEEL COMPOSITE TUBE SHORT COLUMNS UNDER AXIAL COMPRESSION

WEI Yang^1,2*, LI Guo-fen², DUAN Mao-jun²

1. Jiangsu Province Key Laboratory of Structure Engineering, Suzhou 215011, China;
2. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China

Received:2014-05-19 Online:2014-12-28 Published:2021-09-13

摘要/Abstract

摘要： 本文通过9根矩形FRP-钢复合管混凝土短柱的轴压试验,研究截面倒圆角、FRP类型、FRP层数对其轴压性能的影响。研究结果表明,对于矩形FRP-钢复合管混凝土短柱,倒圆角可改善其截面角部的应力集中效应,改善FRP在截面角部的受力,提升FRP的增强效果;FRP约束能够延缓和抑制钢管的局部屈曲,相对于钢管混凝土对比柱,FRP-钢复合管混凝土柱的承载力和延性均有显著提高;对比不同FRP类型,CFRP对承载力及屈服后刚度的提高优于BFRP。

关键词: 纤维复合材料(FRP), 钢管, 矩形截面, 约束混凝土, 轴压试验

Abstract: Axial compression loading test of nine rectangular concrete-filled FRP-steel composite tube short columns (CFCTs) were conducted to investigate the effects of rounded corners, the FRP layers and the FRP types on axial compressive performance of CFCTs. The results show that rounded corners can improve the stress concentration effects and the stress distribution of the FRP at the corners of the section, and increase strengthening effects exerted by the FRP. The FRP confinement can delay and suppress local buckling of steel tube, compared to concrete-filled steel tube columns, the strength and the ductility of CFCTs were significantly improved. Comparing the different types of FRP, CFRP exhibits much better effects on the enhancement of the strength and the post-yielding stiffness than BFRP.

Key words: fiber reinforced polymer(FRP), steel tubes, rectangular section, confined concrete, axial compression test

中图分类号:

魏洋, 李国芬, 端茂军. 矩形FRP-钢复合管混凝土短柱的轴压试验研究[J]. 复合材料科学与工程, 2014, 0(12): 47-51.

WEI Yang, LI Guo-fen, DUAN Mao-jun. EXPERIMENTAL STUDY ON RECTANGULAR CONCRETE-FILLED FRP-STEEL COMPOSITE TUBE SHORT COLUMNS UNDER AXIAL COMPRESSION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(12): 47-51.

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