（上海市建筑科学研究院上海市工程结构安全重点实验室， 上海 200032）

［摘要］大断裂应变纤维布（LRS FRP）是一种低弹模新型绿色纤维材料，应用于结构加固,可显著提高延性。为研究LRS FRP环向围束法加固混凝土柱中的加固效果，设计了2根未加固的对比混凝土柱和3根LRS FRP加固混凝土柱并开展了轴压试验研究。结果表明：LRS FRP环向围束法加固混凝土柱可显著提高其变形能力和延性，提出的LRS FRP加固混凝土柱受压承载力计算方法与试验结果吻合较好。

［关键词］混凝土柱； 加固； 环向围束法； 大断裂应变纤维布； 轴压

中图分类号：TU366-1文献标识码：A文章编号：1002-848X(2018)04-0078-05

Experimental research on axial compression performance of RC columns strengthened by LRS FRP

Li Xiangmin, Chen Xi, Xu Qingfeng, Wang Zhuolin

(Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences, Shanghai 200032, China)

Abstract:Large rupture strain FRP (LRS FRP) is a new green fiber material with low elastic modulus, and it can provide high ductility when applied in strengthening. In order to investigate the strengthening effect of LRS FRP on RC columns using circumferential bundle method, two unstrengthened comparison columns and three columns strengthened with LRS FRP were designed to be tested under uniaxial loading. Experimental results indicate that RC columns strengthened with LRS FRP using circumferential bundle method increase deformability and ductility. The results proposed by calculation method of the compression bearing capacity of the strengthened LRS FRP columns are in good agreement with the experimental results.

Keywords:RC column; strengthening; circumferential bundle method; large rupture strain FRP; axial compression

*上海市优秀技术带头人计划（16XD1422400），上海市青年科技启明星项目（15QB1403200）。

作者简介：李向民，博士，教授级高级工程师，一级注册结构工程师，Email: 13601902634@163.com。