单调荷载下TRC加固RC梁受弯性能的试验研究  

Experimental Study on Flexural Performance of RC Beams Strengthened with TRC Under Monotonic Loading

作　　者：尹世平[1,2] 盛杰[2] 李鹏昊[2] 叶桃[2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室力学与建筑工程学院,江苏徐州221116

出　　处：《应用基础与工程科学学报》2016年第3期564-572,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51478458;51108451);江苏省自然科学基金项目(BK2011220);中国博士后基金项目(2012M511337;2014T70559);中央高校基本科研业务费专项资金资助项目(2014QNA79)

摘　　要：为了研究TRC加固方式(单面和三面)、RC梁的配筋率和损伤程度对TRC加固RC梁受弯特性的影响,并比较TRC与CFRP加固法的优劣,本文对13根梁进行了四点弯曲试验.研究表明,采用的两种加固方式都可以提高RC梁的弯曲承载力,且可以有效地延缓弯曲裂缝的发展.TRC加固对低配筋率梁的弯曲承载力的提高幅度要高于较高配筋率梁,且TRC对损伤梁有着较好的增强修复效果.与CFRP相比,TRC加固RC梁弯曲承载力的提高略低于CFRP,但在弯曲裂缝控制方面要优于CFRP.最后,推导了TRC加固RC梁抗弯承载力计算公式,得到的计算结果表明该公式可以用于TRC加固RC梁抗弯承载力计算.In order to study the influences of the strengthening form( single-sided or three-sided strengthening) of Textile-reinforced concrete( TRC),the reinforcement ratio and different damage degree of reinforced concrete( RC) beams on the flexural performance of RC beams strengthened with TRC,and compare the advantages and disadvantages of TRC strengthening form with that of CFRP,a total of 13 test beams were conducted through the four-point bending experiment. The results show that the flexural bearing capacity of the RC beams strengthened with TRC can be improved by these two different strengthening forms,and the development of bending cracks can be effectively delayed. Besides,for TRC-strengthened beams,the flexural bearing capacity of beams with low reinforcement ratio has better improvement than that of beams with high reinforcement ratio,and TRC has the effective enhancement for damaged beams. Comparing with CFRP,the flexural bearing capacity of beams strengthened with TRC increased slightly lower than that of beams strengthened with CFRP,but TRC has a better capacity to delay the development of bending cracks. At last,the calculation formula of the bearing capacity of RC beams strengthened with TRC is derived and the calculated results show that this formula can be used to obtain the bearing capacity of the RC beams strengthened with TRC.

关 键 词：抗弯加固 TRC 配筋率 加固方式 损伤 

分 类 号：TU375.1[建筑科学—结构工程]