计算力学学报2023，Vol.40Issue(6)：902-911,10.DOI:10.7511/jslx20220610002
地震和风耦合作用下连体高层建筑联合易损性分析方法研究
Study on joint fragility analysis method of conjoined high-rise buildings under combined actions of earthquake and wind
摘要
Abstract
In recent years,high-rise conjoined buildings are increasingly popular in constructing urban landmark buildings.They are inevitably affected by various disasters such as winds and even earthquakes during their service life.However,the failure probability analysis of a structure subjected to a single hazard may underestimate the possibility of structural damage and even collapse.Therefore,an evaluation method for structural safety performance under the action analysis of multiple hazards is urgently needed.Taking the conjoined high-rise building of Suzhou International Conference Hotel as example,this paper studies the joint fragility analysis method under the combined actions of earthquake and wind.Firstly,the multi-hazard fragility function and structural performance demand function under the combined action of earthquake and wind are established,and a multi-hazard joint fragility analysis method is formed.Then,ground motion records are selected,the structural wind loads are simulated based on the computational wind tunnel,and a single-hazard structural fragility analysis is carried out.Finally,100 sets of earthquake and wind load combinations are sampled based on the uniform distribution,and the multi-hazards joint fragility analysis of the structure is carried out.The results show that the structure's fragility increases with the PGA and wind speed.As a result,the multi-hazard failure probability of each failure state of the structure increases compared with the single-hazard failure probability.When the wind speed reaches 40 m/s,the probabilities of slight damage,moderate damage,severe damage,and collapse of the structure under rare earthquakes increased by 1.13％,35.67％,84.00％,and 98.33％,respectively,compared with those subjected to earthquake only.The research in this paper provides usable tools and references for the multi-hazard safety performance evaluation of complex high-rise buildings.关键词
连体高层建筑/地震作用/风荷载/多灾害耦合作用/易损性曲面Key words
high-rise conjoined buildings/earthquake action/wind load/multi-hazard combined action/fragility surface分类
建筑与水利引用本文复制引用
杨连森,陈鑫,谈丽华,赵宝成,郭一峰..地震和风耦合作用下连体高层建筑联合易损性分析方法研究[J].计算力学学报,2023,40(6):902-911,10.基金项目
国家自然科学基金(2178294) （2178294）
江苏省六大人才高峰(JZ-004) （JZ-004）
江苏省高等学校自然科学研究重大项目(19KJA430019) （19KJA430019）
苏州市科技计划项目(SYG202113) （SYG202113）
江苏省研究生实践创新计划(SJCX21-1387)资助. （SJCX21-1387）
