FRP加固矩形截面混凝土柱在单轴轴压荷载下考虑尺寸效应的应力-应变关系研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (6): 35-39.

FRP加固矩形截面混凝土柱在单轴轴压荷载下考虑尺寸效应的应力-应变关系研究

王作虎¹, 刘晶波², 杜修力³

1.北京建筑大学土木与交通工程学院,北京100044;
2.清华大学土木工程系,北京100084;
3.北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

收稿日期:2013-09-26 出版日期:2014-06-28 发布日期:2021-09-14
作者简介:王作虎(1979-),男,工学博士,讲师,主要从事FRP混凝土结构、施工模拟等研究。
基金资助:
国家自然科学基金项目(51308028);北京建筑大学科学研究基金项目(00331613014)

SIZE EFFECT ON STRESS-STRAIN RELATION OF FRP STRENGTHENED RECTANGULAR CONCRETE COLUMNS UNDER MONOTONIC AXIAL LOADING

WANG Zuo-hu¹, LIU Jing-bo², DU Xiu-li³

1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;
3. The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

Received:2013-09-26 Online:2014-06-28 Published:2021-09-14

摘要/Abstract

摘要： 由于受到试验设备加载能力等研究条件的限制,目前FRP加固钢筋混凝土柱的破坏机理研究主要都是基于小尺寸试件的破坏试验,其研究成果对现代大型土木工程常用的大尺寸构件是否适用还没有得到验证。在修正尺寸效应律公式的基础上,对FRP约束圆形混凝土柱的极限强度公式进行调整,推导了反映尺寸效应的FRP约束矩形截面混凝土柱的极限强度计算公式,计算结果与试验结构吻合较好。

关键词: FRP, 矩形截面柱, 尺寸效应, 轴压性能, 应力-应变关系

Abstract: Due to research limitations, such as the loading capacity of test equipment, the failure mechanism of FRP strengthened concrete structure design is mainly based on small size destructive test, whether it is scientific and rational to be used for large-size component in modern large-scale civil engineering haven′t been verified. Based on the idea of modified size effect law and the model of circular concrete columns, new models for predicting strength of rectangular columns confined with FRP are proposed, which can reflect the effect of different columns sizes on the compressive strength. The comparison with experiment results and existing models shows that the proposed models are more accurate.

Key words: FRP, rectangular concrete columns, size effect, axial compressive behavior, stress-strain relation

中图分类号:

TB332
TU375

王作虎, 刘晶波, 杜修力. FRP加固矩形截面混凝土柱在单轴轴压荷载下考虑尺寸效应的应力-应变关系研究[J]. 复合材料科学与工程, 2014, 0(6): 35-39.

WANG Zuo-hu, LIU Jing-bo, DU Xiu-li. SIZE EFFECT ON STRESS-STRAIN RELATION OF FRP STRENGTHENED RECTANGULAR CONCRETE COLUMNS UNDER MONOTONIC AXIAL LOADING[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(6): 35-39.

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