CFRP网复合砂浆加固短肢剪力墙连梁抗震性能试验研究  

Study on Seismic Performance of Short-Limb Shear Wall Coupling Beams Strengthened by CFRP Network Composite Mortar

作　　者：李如博 蒋隆敏[1] 王球 LI Rubo;JIANG Longmin;WANG Qiu(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2020年第3期49-55,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51741804);湖南省自然科学基金资助项目(2016JJ5037)。

摘　　要：为了研究短肢剪力墙连梁震后加固的抗震性能,按照1:3的比例设计了两个带有连梁的短肢剪力墙模型,首先对原始试件进行同等程度的预损加载直至破坏,两个试件均发生剪切破坏。根据破坏形态及破坏所发生部位,采用碳纤维增强复合材料和复合砂浆来加固两个试件,通过对加固试件进行低周循环加载试验,获取加固试件的极限承载力和变形量,重点分析了不同工况下加固试件的滞回性能和延性性能。研究表明:采用CFRP网加固使试件承载能力、延性性能和耗能能力得到明显提高,刚度退化速度变缓,该结论和加固方法对实际工程连梁因配箍筋不足而进行的抗剪加固以提高抗震性能有较好的参考价值。For a better study on the seismic performance of short-limb shear wall coupling beams after earthquake,two short-limb shear wall models with coupling beams are designed with a ratio of 1:3.Firstly,the original specimens are subjected to the same degree of preload loading until they are destroyed,with the shear failure occurring in both specimens.The carbon fiber-reinforced polymer (CFRP) mesh and composite mortar are used to reinforce the two specimens according to the fracture mode and the position of failure.The ultimate bearing capacity and deformation of the strengthened specimens can be obtained by low-cycle reciprocating loading tests,followed by an analysis of the hysteretic and ductile properties of the specimens under different working conditions.The results show that the bearing capacity,ductility and energy dissipation capacity of the specimens have been significantly improved by the CFRP mesh reinforcement,with the degradation rate of stiffness slowed down.The research conclusion and the proposed reinforcement method are of valuable significance for the shear reinforcement of the actual engineering coupling beam due to the lack of stirrups to improve the seismic performance.

关 键 词：CFRP网 高性能复合砂浆 加固 滞回性能 延性性能 

分 类 号：TU352.1[建筑科学—结构工程]