CFRP加固震损填充墙RC框架结构抗震性能试验研究

doi:10.19936/j.cnki.2096-8000.20230128.010

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (1): 85-93.DOI: 10.19936/j.cnki.2096-8000.20230128.010

CFRP加固震损填充墙RC框架结构抗震性能试验研究

张永兵^1,2,3, 吴建新¹, 代柏乐¹, 郑磊¹

1.广西大学土木建筑工程学院,南宁530004;
2.广西大学工程防灾与结构安全教育部重点实验室,南宁530004;
3.广西大学广西防灾减灾与工程安全重点实验室,南宁530004

收稿日期:2021-12-08 出版日期:2023-01-28 发布日期:2023-02-24
作者简介:张永兵(1979—),男,博士,副研究员,主要从事结构地震易损性分析方面的研究,zhangyongbing@foxmail.com。
基金资助:
国家自然科学基金项目(51868004,51568005);广西自然科学基金资助项目(2013GXNSFBA019236)

Experimental study on seismic performance of CFRP-retrofitted earthquake-damaged masonry-infilled RC frame

ZHANG Yongbing^1,2,3, WU Jianxin¹, DAI Baile¹, ZHENG Lei¹

1. School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
2. Key Laboratory of Engineering Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China;
3. Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China

Received:2021-12-08 Online:2023-01-28 Published:2023-02-24

摘要/Abstract

摘要： 为了研究碳纤维增强复合材料(CFRP)加固震损填充墙钢筋混凝土(RC)框架结构抗震性能,完成了3榀已经震损的填充墙RC框架试件及1榀完好空框架试件CFRP加固后的拟静力试验,获得了CFRP加固震损后填充墙RC框架结构的破坏形态和滞回曲线,分析其承载力、刚度退化、耗能和延性等抗震性能指标,并与完好未加固试件进行对比。结果表明:CFRP加固震损空框架试件,可以有效提高试件的峰值承载力和耗能能力,结构刚度退化水平缓于原试件;CFRP加固震损刚性连接填充墙RC框架试件,可以恢复试件的承载力、刚度和耗能能力至震损前水平;CFRP加固震损柔性连接填充墙RC框架试件,由于橡胶的存在延缓了填充墙与框架之间较强的顶推作用,延缓了填充墙的破坏,使得框架和填充墙依然能够协同工作继续抵抗水平荷载,当试件较大变形时,CFRP充分发挥约束作用,其峰值承载力、耗能能力都可以得到显著提高,刚度退化也较原试件缓慢。

关键词: CFRP加固, 震损填充墙钢筋混凝土框架, 抗震性能, 拟静力试验

Abstract: In order to investigate the seismic performance of CFRP-retrofitted earthquake-damaged masonry-infilled reinforced concrete (RC) frames,three earthquake-damaged masonry-infilled RC frame specimens and one RC frame specimen were tested under low-cyclic reversed load after its CFRP reinforcement, the damage characteristics and hysteresis curves of the specimens were obtained, the seismic performance indexes of the specimens, such as bearing capacity, stiffness degradation, energy dissipation and displacement ductility were analyzed, and compared with the earthquake-damaged masonry-infilled RC frame specimens and unreinforced RC frame specimens. The results show that the peak bearing capacity of earthquake-damaged frame specimens retrofitted by CFRP can be effectively improved, the degradation level of structural stiffness is slower than that of the original specimens, and the energy dissipation capacity is also improved. The reinforcement of CFRP can restore the bearing capacity, stiffness and energy dissipation capacity of earthquake-damaged masonry-infilled RC frame with rigid connection to the level before earthquake damage. The specimen with flexible connection filled wall frame retrofitted with CFRP for earthquake damage is delayed due to the presence of rubber, which delays the strong pushing effect between the filled wall and the frame and the destruction of the filled wall, so that the frame and the masonry-infilled wall can still work together and continue to resist horizontal load. CFRP gives full play to the restraint effect under large deformation of the specimen. Its peak bearing capacity and energy dissipation capacity can be significantly improved, and its stiffness degradation is slower than that of the original specimen.

Key words: CFRP-retrofitted, earthquake-damaged masonry-infilled RC frame, seismic performance, pseudo-static test

中图分类号:

TB332

张永兵, 吴建新, 代柏乐, 郑磊. CFRP加固震损填充墙RC框架结构抗震性能试验研究[J]. 复合材料科学与工程, 2023, 0(1): 85-93.

ZHANG Yongbing, WU Jianxin, DAI Baile, ZHENG Lei. Experimental study on seismic performance of CFRP-retrofitted earthquake-damaged masonry-infilled RC frame[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(1): 85-93.

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CFRP加固震损填充墙RC框架结构抗震性能试验研究

Experimental study on seismic performance of CFRP-retrofitted earthquake-damaged masonry-infilled RC frame

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