村镇砌体结构民居地震倒塌易损性分析  

Analysis on seismic collapse vulnerability of masonry structures of residential houses in rural areas

作　　者：缪志伟 陈康诺 马栋梁 杨冬梅[1] 刘一凡 Miao Zhiwei;Chen Kangnuo;Ma Dongliang;Yang Dongmei;Liu Yifan(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《东南大学学报（自然科学版）》2024年第5期1154-1160,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家重点研发计划资助项目(2018YFD1100402).

摘　　要：为了快速定量评估我国村镇区域现存的大量居民自建砌体房屋的地震抗倒塌性能,提出了一种基于简化分析模型的地震倒塌易损性分析方法.针对不同抗震构造措施的村镇典型砌体结构民居,基于砌体墙片恢复力模型和刚性楼板假定,建立结构简化剪切层模型,并根据结构的典型地震倒塌破坏模式,确定对应的倒塌判断准则.通过对比所提模型与精细化有限元模型的模拟结果,验证该模型在倒塌分析中的可靠性.基于23条地震动的增量动力分析,得到各简化剪切层模型的倒塌易损性曲线,量化评价结构抗倒塌性能.结果表明:增加构造柱可以显著提高结构抗倒塌能力;相较于现浇楼板,采用预制楼板后结构抗倒塌能力减弱;不设置构造柱和圈梁且采用预制楼板的结构抗倒塌储备系数仅为采用完好抗震构造措施结构的10%.To quickly and quantitatively evaluate the seismic collapse resistance performance of a large number of self-built masonry buildings in rural areas of China,an analysis method of seismic collapse vulnerability based on a simplified analysis model was proposed.For the typical masonry structures of residential houses in rural areas with different seismic structural measures,a structural simplified shear storey model was established based on the restoring force model of masonry wall panels and rigid floor assumption,and the corresponding collapse judgment criterion was determined according to the typical collapse modes of the structure.The reliability of the proposed model in collapse analysis was verified by comparing the simulation results with those of the refined model.The incremental dynamic analysis based on 23 ground motions was carried out for each simplified shear storey model to obtain the collapse fragility curves,and the seismic collapse resistance of typical rural masonry structures was quantitatively evaluated.The results show that adding structural columns can significantly improve the structural seismic collapse resistance.The collapse resistance of the masonry structures with precast slabs is significantly reduced compared to that of the structures with cast-in-place slabs.The collapse margin ratio of the masonry structures without constructional columns and ring beams but using precast slabs is only 10%of that of the structures with intact seismic structural measures.

关 键 词：村镇区域 砌体结构 倒塌易损性分析 剪切层模型 抗倒塌性能 

分 类 号：TU362[建筑科学—结构工程]