预应力碳纤维复材布加固钢筋混凝土方柱轴压性能分析  

ANALYSIS OF BEHAVIORS OF REINFORCED CONCRETE SQUARE-COLUMN STRENGTHENED WITH PRESTRESSED CFRP SHEET UNDER AXIAL COMPRESSION

作　　者：卢春玲[1,2,3] 李中洋 黄博[1,2] 王强 LU Chunling;LI Zhongyang;HUANG Bo;WANG Qiang(College of Civil and Architecture Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Rock-Soil Mechanics and Engineering,Guilin 541004,China;Guilin University of Technology,Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guilin 541004,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西岩土力学与工程重点实验室,广西桂林541004 [3]桂林理工大学,广西有色金属隐伏矿床勘查及材料开发协同创新中心,广西桂林541004

出　　处：《工业建筑》2018年第7期173-179,共7页Industrial Construction

基　　金：国家自然科学基金项目(51568015);广西岩土力学与工程重点实验室资助项目(2015-B-08);桂林理工大学博士启动基金;大学生创新项目(YCSW2017154)

摘　　要：为了分析预应力碳纤维复材布加固钢筋混凝土（RC）方柱的轴压性能,利用有限元分析软件ANSYS对已有试验试件进行了数值模拟,并将数值模拟结果与试验结果进行对比,验证数值模拟的准确性。根据数值模拟结果对预应力碳纤维复材布加固RC方柱的约束机理进行了探讨;分析了CFRP布预应力水平、包裹方式、方柱倒角半径对试件加固效果的影响。结果表明：数值模拟结果与试验值吻合较好;CFRP布预应力水平、包裹范围越大,加固效果越好。增大方柱倒角半径能有效减少角部应力集中。To research the compressive performance of reinforced concrete（ RC） square columns strengthened with prestressed carbon fiber reinforced plastics（ CFRP）,based on the test data,the finite element analysis on the RC square-column strengthened with CFRP sheets was carried out by ANSYS software. The numerical simulation results were compared with the experimental results to verify the reliability of the numerical simulation. Based on the numerical simulation result,the mechanics of RC square column strengthened with prestressed CFRP sheet were discussed. The influence of the prestressed level of CFRP cloth,the way of wrapping and the chamfering radius of square pillars on the reinforcement effect of the specimen were analyzed. Results showed that numerical simulation results are in good agreement with the experimental data. The bearing capacity and ductility the of the RC squarecolumn strengthened with CFRP sheets has been significantly increased,and increased with the increase of prestress level and the package range of the CFRP. Increasing the chamfer radius of square pillars can effectively reduce corner stress concentration.

关 键 词：预应力CFRP布 加固 钢筋混凝土 轴压荷载 有限元 数值模拟 

分 类 号：TU375.3[建筑科学—结构工程]