CFRP持载约束偏心受压柱承载性能有限元分析  

Finite Element Analysis of Bearing Capacity of EccentricallyCompressed Columns Restrained by CFRP

作　　者：黄林青[1] 宋杰 廖新雪 朱贤华 谭莉莉 HUANG Linqing;SONG Jie;LIAO Xinxue;ZHU Xianhua;TAN Lili(School of Architectural Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;CMCU Engineering Co.Ltd.,Chongqing 400039,China)

机构地区：[1]重庆科技学院建筑工程学院,重庆401331 [2]中机中联工程有限公司,重庆400039

出　　处：《重庆科技学院学报（自然科学版）》2022年第5期97-101,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：重庆市土木建筑学会2021年度科技项目“碳纤维布横向约束小偏心受压柱受力性能研究”(2021B09)。

摘　　要：利用有限元软件ABAQUS建立11根钢筋混凝土(RC)柱的加固模型,对碳纤维(CFRP)环向约束RC柱的受力性能进行研究,研究结果表明:随着持载水平的增加,组合柱在极限状态时的横向膨胀应变和纵向钢筋应变均降低,RC柱延性下降,CFRP布约束效果受限,组合柱极限承载力的提升幅度降低;在持载条件下,增大CFRP布条带宽度或增加粘贴层数,能有效改善RC柱的延性,提高RC柱的极限承载力;当CFRP布粘贴量超过一定程度后,其对RC柱极限承载力的提升效果逐渐下降。In this paper,the force performance of CFRP circumferential constraint RC columns is studied after the reinforcement model of 11 reinforced concrete columns is established by the finite element software ABAQUS.The results show that with the increase of the load holding level,the lateral expansion strain and longitudinal reinforcement strain of the concrete column in the limit state decrease,as well as the overall ductility of the concrete column.And the constraint effect of CFRP cloth is limited,and the increase in the limit bearing capacity of the composite column is reduced.By increasing the width of the carbon fiber cloth strip or increasing the number of pasted layers under the load holding condition,the ductility of the concrete column and the ultimate bearing capacity of the concrete column can be effectively improved.Due to the material characteristics of the concrete itself,when the pasting amount exceeds a certain degree,although its ductility can be further improved,the effect of increasing the ultimate bearing capacity gradually decreases.

关 键 词：CFRP 持载下 环向约束 极限承载力 有限元分析 

分 类 号：TU375.3[建筑科学—结构工程]