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| Study on joint fragility analysis method of conjoined high-rise buildings under combined actions of earthquake and wind |
| Received:June 10, 2022 Revised:September 01, 2022 |
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| DOI：10.7511/jslx20220610002 |
| KeyWord:high-rise conjoined buildings earthquake action wind load multi-hazard combined action fragility surface |
| Author | Institution |
| 杨连森 |
苏州科技大学 江苏省结构工程重点实验室, 苏州 |
| 陈鑫 |
苏州科技大学 江苏省结构工程重点实验室, 苏州 |
| 谈丽华 |
中衡设计集团股份有限公司, 苏州 |
| 赵宝成 |
苏州科技大学 江苏省结构工程重点实验室, 苏州 |
| 郭一峰 |
中衡设计集团股份有限公司, 苏州 |
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| 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. |
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