地震和风耦合作用下大跨度单层球面网壳结构动力响应特征及易损性分析  

Dynamic response and vulnerability analysis of large-span single-layer reticulated shell structures subjected to coupled earthquake and wind

作　　者：王月 芦燕[1,2,3] WANG Yue;LU Yan(School of Civil Engineering,Tianjin University,Tianjin 300350,China;Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration,Tianjin University,Tianjin 300350,China;Key Laboratory of Coast Civil Structure Safety of Ministry of Education,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]天津大学中国地震局地震工程综合模拟与城乡抗震韧性重点实验室,天津300350 [3]天津大学滨海土木工程结构与安全教育部重点实验室,天津300350

出　　处：《空间结构》2023年第3期21-30,58,共11页Spatial Structures

基　　金：国家自然科学基金项目(52022067,U1939208).

摘　　要：地震发生时,有时伴随着强风天气.多灾害的耦合作用造成的结构破坏损失可能远大于任一单独灾害作用造成结构破坏损失的简单叠加.本文选用地震峰值加速度(PGA)和风速(V)为参数,通过Copula函数构造地震与风的联合概率密度分布函数,基于土-结构相互作用模型,分析了单层球面网壳结构在地震和风耦合下的动力响应特征和易损性.研究表明:地震和风耦合后结构的易损性增大,且V值越大,结构易损性越大,易损性增加的幅度越大.结构处于“严重破坏”和“倒塌破坏”状态时,风速对易损性的影响更明显,在“严重破坏”和“倒塌破坏”状态下考虑地震和风的耦合作用更有意义.When earthquakes occur,they are often accompanied by strong winds.The structural damage losses caused by the coupling of multiple disasters may be greater than the combination of the structural damage caused by any single disaster.In this paper,Peak Ground Acceleration(PGA) and wind Velocity(V) were selected as parameters to construct the joint probability distribution function of earthquake and wind through Copula function,and the failure characteristics of single-layer reticulated shell structures under the coupling of earthquake and wind were analyzed.Results show that vulnerability of the structure increases due to wind speed coupling,and the greater the V is,the more heavily the vulnerability increases,and the smaller the influence of PGA on the vulnerability turns to be.When the structure is in the state of “severe damage” and “collapse damage”,the influence of wind speed on the vulnerability is more obvious,indicating that it is more meaningful to consider the coupling effect of earthquake and wind under these states.

关 键 词：大跨空间结构 多灾害耦合 联合概率密度分布函数 易损性分析 土-结构相互作用 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3