冻融循环对FRP增强混凝土柱影响试验研究  

Experimental study of effects of freeze-thaw cycle on concrete columns strengthened with FRP laminates

作　　者：胡安妮[1] 任慧韬[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024

出　　处：《大连理工大学学报》2006年第6期862-867,共6页Journal of Dalian University of Technology

基　　金：辽宁省交通厅重点课题资助项目(0115)

摘　　要：为验证采用FRP加固混凝土结构的耐久性能,采用快速冻融循环试验方法,首先研究了冻融循环对FRP力学性能、粘结剂剪切粘结性能、FRP与混凝土粘结强度的影响,并在此基础上进一步研究了冻融循环对FRP加固混凝土柱受力性能的影响.结果表明:冻融循环对CFRP的力学性能影响不大,对GFRP力学性能有较大影响;冻融循环对FRP与混凝土粘结性能影响较大,对FRP增强混凝土柱的影响不显著.External bonding fiber reinforced polymer （FRP） has been increasingly used to repair the concrete structures. Tests are necessary for verifying the durability of the strengthened structures due to the short time application in repairing concrete structures. So the fast freeze-thaw test is adopted, and mechanical behavior of FRP, adhesive behavior and bond behavior between FRP and concrete after the freeze-thaw cycle are analyzed. In addition, the effects of the freeze-thaw cycle on the concrete columns strengthened with FRP are studied. CFRP specimens suhjected to freeze-thaw cycle show good durability with no significant degradation in tensile strength and modulus. However, GFRP specimens exhibit a little bit decrease in mechanical property after freeze-thaw cycle. The bond strength between FRP and concrete has obvious decrease after freeze-thaw cycle.

关 键 词：FRP 冻融循环 粘结强度 混凝土柱 

分 类 号：TU528.572[建筑科学—建筑技术科学]