摘要
通过对一栋足尺5层砌体结构住宅模型实施外套整体式加固,梳理、总结该加固方法的工艺流程。为了考察加固结构在纵墙方向的整体抗震性能,对试验模型进行了多轮次拟静力和拟动力试验。依据试验结果对外套加固结构震前、震后纵墙方向的抗震性能进行了评估。试验及评估结果显示:加固后的钢筋混凝土剪力墙-砌体墙混合结构的抗侧刚度明显提升,抗震性能表现更接近于钢筋混凝土结构;在外套加固单元的整体工作性能下降后,加固结构的失效由砌体结构部分控制;加固结构纵墙方向在经历超设防水准地震作用后,表现出很强的性能冗余度;受损后的加固结构仍然可以有效抵御超罕遇地震而不致倒塌。由此证明外套加固技术可大幅提升砌体结构抗震性能水准。
The technological process was summarized by applying jacket retrofitting technology on a full-scaled substructure model of a five-story masonry residence.In order to evaluate the seismic performance of the retrofitted structure in longitudinal direction,series of lateral loads,whether quasi-statistic or pseudo-dynamic,were applied on the model.The seismic performance of the longitudinal lateral resistant system before and after earthquakes were assessed based on the experimental results.It demonstrates that the lateral stiffness of the strengthened reinforced concrete shear wall&masonry wall composite structure has an obvious improvement,the composite structure behaves more like RC shear wall structure;the failure mode is controlled by masonry structure after a decrease of the integrity of the jacket-retrofitting units;the strengthened composite structure has adequate redundancy when encountering an overfortification level earthquake;the damaged structure can still overcome another extremely rare earthquake without any collapse.It can be proved that the seismic performance of masonry dwellings retrofitted with PC panel jacket units will improve dramatically.
作者
王啸霆
陈曦
王涛
潘鹏
李文峰
苗启松
WANG Xiao-ting;CHEN Xi;WANG Tao;PAN Peng;LI Wen-feng;MIAO Qi-song(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin,Hei longjiang 150080,China;Beijing Institute of Architectural Design,Beijing 100045,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《工程力学》
EI
CSCD
北大核心
2022年第2期123-135,共13页
Engineering Mechanics
基金
国家重点研发计划资助项目(2019YFE0198900)。
关键词
砌体结构
预制剪力墙
外套加固
抗震试验
性能评估
masonry structure
pre-fabricated shear wall
jacket retrofitting technology
seismic experiment
performance assessment
