考虑工业高位储仓设备与主体结构相互作用的地震响应分析  

Scismic response analysis considering the interaction between high-level industrial silo equipment and the main structure

作　　者：蒲瑞 戴靠山 王健泽 周裕洲 石宵爽[1,2,3] Pu Rui;Dai Kao-shan;Wang Jian-ze;Zhou Yu-zhou;Shi Xiao-shuang(Department of Civl Engiering,Sichuan University,Chengdu 610065,China;Key Laboratory of Deep Underground Science and Engineering,Ministry of Education,Chengdu 610065,China;Failure Mechanics and Disaster Prevention and Mitigation Key Lab of Sichuan Province,Chengdu 610065,China;Pengzhou Housing and Urban-Rural Development Bureau,Chengdu 611930,China)

机构地区：[1]四川大学土木工程系,四川成都610065 [2]深地科学与工程教育部重点实验室,四川成都610065 [3]破坏力学与防灾减灾四川省重点实验室,四川成都610065 [4]彭州市住房和城乡建设局,四川成都611930

出　　处：《工程抗震与加固改造》2023年第3期51-59,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51878426);四川省科技项目(2020JDGD0035);成都市科技项目(2019-GH02-00081-HZ);中央高校基本科研业务费(20826041E4193)。

摘　　要：工业重型储仓因其存储量大、密封性好等特点在工业建筑结构中有广泛的应用。由于工业储仓相比结构总重占比较大,依托在地震作用下重型储仓与主结构发生相互作用。本文选取一高架式燃煤储仓作为研究对象,将储仓按简化荷载方式与精细化建模方式分别建立简化荷载模型与设备-结构一体化模型,研究了储仓与主结构相互作用对主体结构地震效应的影响。选取7条与设计反应谱匹配的地震波以开展动力时程分析,分析中考虑了单向输入与双向输入两种情况,对比了两类模型中主结构最大基底剪力、层间位移角分布,以及支承层局部构件内力的结果。分析结果表明简化荷载模型与设备-结构一体化模型在基底剪力与层间位移角等整体响应指标上的差异较小,最大相对差异不超过10%;在局部支承层结构构件及储仓支座反力的地震效应上差异较大,最大相对差异超过60%。受储仓晃动的影响,在单向与双向地震动输入下,一体化模型支座反力分别是简化模型的1.34倍和1.46倍。相比荷载简化模型,忽略重型储仓的空间晃动会低估主体结构梁、柱、支撑构件的地震效应,导致设计不安全。Industrial heavy silos are widely used in engineering because of their sound storage capacity and airtightness.The dynamic interaction between the heavy silo equipment and the supporting structure can not be ignored if the silo accounts for a large part of the weight of the whole structure.In this paper,a coal-fired industrial building housing-an elevated storage silo is selected to be studied.Two modeling approaches for silo equipment are considered,which are denoted as the simplified equivalent-loading model and equipment-structure integrated model.The former is used to consider the loading effect of the silo,while the latter is taken to consider the equipment-structure interaction.The influence of such dynamic interaction on the seismic effects of the structure is studied.Seven ground motion records that match the acceleration design response spectrum are selected and dynamic response history analysis are performed accordingly.Two cases of using unidirectional input and bi-directional input are considered.The resulting maximum base shear force of the main structure,the story drift profile with the height,and the force demands in the supporting structural components and reactions at the supports of the two types of models are compared.The analysis results showthat the difference in response indicators of base shear force and story drifts between the simplified equivalent-loading model and the equipment-structure integrated model are slight,and the maximum difference is smaller than 10%.In contrast,the relative differences in the force demands of structural components and reactions of supports are as large as 60%.Induced by rocking motions of the silo,the reaction forces of supports for the integrated model are 1.34 times and 1.46 times that of the simplified equivalent-loading model under unidirectional and bidirectional inputs,respectively.The analysis results also demonstrate that the ignorance of rocking motions for the heavy silo would significantly underestimate the seismic demands in structural components

关 键 词：重型储仓 设备-结构相互作用 工业结构 工业设备 地震响应分析 

分 类 号：TU271.1[建筑科学—建筑设计及理论]