摘要
针对自振周期为0.5S的莒南三方山水龙城幼儿园,在中震和大震作用时,输入10组含与不含永久位移型地震动对采用隔震支座的隔震结构和非隔震结构进行非线性地震反应分析,对比分析含与不含永久位移地震动对应的上部结构动力响应及减震效果的影响。结果表明:1)中震时,隔震结构和非隔震结构的1层层间剪力在不含永久位移型地震动作用下的值基本小于含永久位移数值;2)中震时,不含永久位移型地震动作用下隔震结构与非隔震结构的各层层间剪力比值基本小于含永久位移数值,且随楼层增加其比例基本无差别;3)大震时,支座及位移受永久位移影响不大;4)相较而言,沿结构四周布置的隔震支座受到永久位移的影响比内部支座更大,天然橡胶支座的水平剪切力受永久位移的影响大于铅芯橡胶支座。
In this paper,a kindergarten building with natural vibration period of 0.5S is taken as the research object.Under the fortification earthquake and rare earthquake,10 groups of the ground motion with and without permanent displacement are select to analysis nonlinear seismic response of isolated structure and non-isolated structure.By comparing the response of superstructure with and without permanent displacement,the influence of ground motion with permanent displacement on the seismic isolation design of this type of building is analyzed.The results showed that:1)The inter-story shear force of first story under the ground motion without permanent displacement is mostly less than that with permanent displacement.2)The shear force ratio between layers under the ground motion without permanent displacement is mostly less than that with permanent displacement,and the ratio has no significant change with the increase of floor.3)Bearing reactions are not much influenced by permanent displacement.4)By contrast,The isolation bearing around structure is much affected by the permanent displacement than the internal bearings.And The shear of natural rubber bearing is much affected by permanent displacement than the lead rubber bearing.
作者
肖华宁
宋廷苏
李艳华
王林建
XIAO Huaning;SONG Tingsu;LI Yanhua;WANG Linjian(Shenzhen Academy of Disaster Prevention and Reduction,Shenzhen 518000,China;Yunnan Earthquake Agency,Kunming 650224,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期932-938,共7页
Building Structure
基金
中国地震局地震科技星火计划项目(XH19071)
深圳市可持续发展科技专项(KCXFZ202002011010039)
中国地震局地震科技星火计划项目(XH20086)
广东省省级科技计划项目(2018B020208003)
关键词
短周期结构
永久位移
隔震分析
放大效应
建筑
structure with short natural period
permanent displacement
seismic isolation analysis
amplification effect
building
