玄武岩纤维布加固砌体墙抗震性能试验  

Seismic performance of masonry walls strengthened with BFRP

作　　者：张斯[1] 徐礼华[1] 胡晓斌[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2015年第3期294-299,312,共7页Engineering Journal of Wuhan University

基　　金：国家住房和城乡建设部项目(编号:2010-1-154);中央高校基本科研业务费专项资金项目(编号:2012210020205)

摘　　要：通过对1个未加固砌体试件和2个玄武岩纤维布(BFRP)加固砌体试件进行拟静力试验,研究BFRP加固砌体墙的抗震性能,分析BFRP对已开裂和未开裂砌体的加固效果.研究表明:与未加固试件相比,BFRP加固试件的承载能力和变形能力明显提升,刚度和耗能能力显著改善;与BFRP加固未开裂试件对比,BFRP加固已开裂试件的承载能力稍好,但延性较差,且加载初期刚度下降更明显;BFRP改变砌体破坏形态,并能有效抑制已开裂试件的既有裂缝,提高砌体墙的抗震性能.To study the seismic performance of basalt fiber reinforced plastics（BFRP）-strengthened mason- ry walls and analyze the reinforcement effect of the BFRP-reinforced and BFRP-retrofitted masonry walls, cyclic tests of one unreinforced and two BFRP-strengthened masonry specimens were carried out. The research results show that the seismic performance of the BFRP-reinforced specimen is better than the unreinforced specimen, in terms of load resistance, deformation capacity, stiffness degradation and energy dissipation. For the BFRP-retrofitted specimen, its load resistance and deformation performance is better than the one of the BFRP-reinforced specimen; but its trend of equivalent stiffness is sharper at the beginning and tends to be close later. Furthermore, BFRP changes the cracking pattern of masonry walls; the exist- ing cracks in the BFRP-retrofitted specimen are effectively restricted. It can be concluded that the BFRP can significantly improve the seismic performance of the BFRP-strengthened masonry walls.

关 键 词：玄武岩纤维布(BFRP) 加固 砌体结构 抗震性能 

分 类 号：TU362[建筑科学—结构工程]