持载与湿热环境下CFRP加固高强混凝土梁结构性能研究  

Structure Performance of Reinforced High-strength Concrete Beams Strengthened with CFRP Under Load and Hygrothermal Environment Conditions

作　　者：王苏岩[1] 朱方芳 张红涛 刘振杰 WANG Suyan, ZHU Fangfang, ZHANG Hongtao, LIU Zhenjie(State Key of Laboratory of Coastal and OffShore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, Chin)

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《水利与建筑工程学报》2018年第3期36-41,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(51378089)

摘　　要：夏季湿热的大气环境对我国大部分地区的CFRP(碳纤维增强聚合物)加固钢筋混凝土结构性能有不利影响。为探讨湿热环境与荷载耦合作用对CFRP加固高强钢筋混凝土梁结构性能的影响,共制作16根CFRP加固钢筋混凝土梁试件,在不同温湿度环境下,对荷载与湿热环境耦合作用下CFRP加固钢筋混凝土梁进行试验研究与理论分析。试验结果表明:随湿热环境作用时间增加,CFRP加固混凝土梁剥离破坏界面由混凝土层逐渐转移到树脂胶层;荷载与湿热环境的耦合作用对CFRP加固钢筋混凝土梁极限承载力影响较明显;湿热环境对加固钢筋混凝土梁的结构性能有不利影响。CFRP（ Carbon Fiber Reinforced Polymer） reinforced concrete structure has been adopted in most parts of China,the hygrothermal environment in summer adversely affects its structural performance. In order to investigate the influence of hygrothermal environment on the structural properties of CFRP reinforced high strength reinforced concrete beams,a total of 16 specimens of CFRP strengthened concrete beams were made. Under different temperature and humidity conditions,the CFRP reinforced concrete beams under the coupling of load and hygrothermal environment was tested and analyzed. The experimental results show that with the increased exposure during hygrothermal environment,the peeling-failure interface of CFRP strengthened concrete beam is gradually transferred from the concrete layer to the resin layer. The coupling effect between load and hygrothermal environment has obvious influence on the ultimate bearing capacity of CFRP-strengthened RC beams. The hygrothermal environment has an adverse effect on the structural performance of RC beams.

关 键 词：CFRP 荷载 湿热环境 耦合作用 结构性能 

分 类 号：TU375.1[建筑科学—结构工程]