CFRP布修复隧道中冻融损伤混凝土抗弯构件力学性能研究  

Study of Mechanical Properties of Freezing-thawing Damaged Concrete Bending Components of Tunnel Strengthened by CFRP Sheets

作　　者：贾良[1] 聂红宾[1] 

机构地区：[1]陕西铁路工程职业技术学院轨道工程系,陕西渭南714000

出　　处：《隧道建设》2016年第7期819-825,共7页Tunnel Construction

基　　金：陕西铁路工程职业技术学院科研基金项目(编号2014-44)

摘　　要：为了进一步研究碳纤维(carbon fiber reinforced polymer,CFRP)修复隧道中冻融损伤混凝土抗弯构件的力学性能,对CFRP布修复冻融损伤混凝土构件进行抗弯试验,研究CFRP布全、分包修复不同冻融损伤试件的效果。试验结果表明:CFRP布能有效提高损伤试件的承载力、延性性能,尤其是全包方式;随着冻融次数的增加,CFRP布修复试件的承载力逐渐降低,中性轴上移速度越来越快;通过理论计算,得到了不同冻融损伤程度修复构件的抗弯承载力公式,并利用ABAQUS有限元软件进行模拟,得到的计算值、模拟值与试验值进行比较,结果吻合较好。The mechanical properties of the freezing-thawing damaged concrete bending components of tunnel strengthened by carbon fiber reinforced polymer（ CFRP） are studied. The bending tests are carried out and the repairing effects of tunnel by using CFRP sheet are analyzed. The testing results show that： 1） The bending capacity and ductility performance of damaged components can be improved by using CFRP,especially by using full-covered mode. 2） The bending capacity of damaged components decreases and the lifting speed of neutral axis increases with the freezingthawing cycle increases. 3） The formula for bending capacity of damaged components is obtained by theoretical calculation; and simulation is carried out by ABAQUS finite element software. The calculated results and simulated results coincide with testing results well.

关 键 词：隧道 CFRP布 冻融循环 抗弯承载力 ABAQUS有限元 

分 类 号：U454[建筑科学—桥梁与隧道工程]