高温下GFRP筋和混凝土粘结性能的实验研究  

The experimental investigation of bond behavior between GFRP bar and concrete in high temperature

作　　者：鞠竹[1] 王振清[1] 李晓霁[1] 韩玉来[1] 刘兵[1] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第11期1351-1357,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(11272096);教育部博士生基金资助项目(20112304110015);高等学校博士学科点专项科研基金资助项目(20102304120021);中央高校基本科研业务费专项基金资助项目(HEUCF20100201)

摘　　要：为了研究高温下GFRP筋和混凝土的粘结性能,采用直径8 mm的GFRP筋和100 mm×100 mm×100 mm立方体混凝土试块组成的粘结试件,在20～190℃温度范围内选定5种工况,进行了一系列GFRP筋和混凝土之间的粘结性能实验.为了获得2种材料的力学性能,实验中测量了GFRP筋在高温下的抗拉强度以及混凝土的抗压强度.实验分别测量了不同温度条件下GFRP筋和混凝土之间的粘结强度、残余粘结应力以及不同时刻粘结实验段两端(包括自由端和加载端)的滑移量值.基于实验结果确定出了粘结滑移方程的参数,为理论分析两种材料的粘结滑移本构关系提供了有效的帮助.Pull-out specimens were used to study the effect of temperature ranging from 20℃ to 190℃ in dry envi- ronment on bond properties between glass fiber reinforced polymer （GFRP） bars and concrete. Experimental evalu- ations were carried out based on C30 concrete cubes and GFRP bars with the diameter of 8 mm. The experimental program consists of three parts ： first, measuring the material properties of GFRP bars and concrete ; second, confir- ming the interface bond strength and the associated slip values at both ends of the adhesive specimens in different temperature ; third, the residual bond stress and the associated slip values at both ends of the adhesive specimens in different temperature were also measured. Confirming the parameter based on experimental results is useful for theo- retical study on bond-slip constitutive relationship between GFRP bars and concrete.

关 键 词：GFRP筋 混凝土 高温 粘结性能 滑移 

分 类 号：TU317.1[建筑科学—结构工程]