摘要
为研究某博物馆隔减震联合方案,对采用橡胶隔震支座基础和上部屈曲约束支撑的结构进行了1/30缩尺模型的地震模拟振动台试验。试验研究表明:在各水准地震作用后,联合隔减震结构仅出现轻微损伤,在设防地震后Y向第一平动自振频率降低了9.1%,罕遇地震后第一扭转自振频率降低了6.1%;加速度放大系数在隔震层为0.45,上部结构也均小于1.0;随着地震作用的增加隔震支座的耗能表现越来越好,从多遇地震下耗能仅约4 kN·mm,到罕遇地震下耗能最大值约达426 kN·mm。该结构的隔减震方案实现了预期减震目标。
In order to study the seismic performance of a museum adopting a measure of seismic isolation and shock absorption,a 1/30 scale model of the structure with rubber isolation bearings beneathe column bottoms of ground floors and buckling-restrainted braces in the upper structure was conducted on a shaking table for earthquake simulation tests.Experimental research showed that subjected to various levels of earthquakes,the combined seismic isolation and shock absorption structure was only slightly damaged,the first of translation natural vibration frequency in the Y-direction was reduced by 9.1%subjected to the fortification earthquake,and the first torsional frequency reduced by 6.1%subjected to the rare earthquake.The acceleration amplification factor was 0.45 in the isolation storey,and the upper structure was also less than 1.0.The energy consumption performance of isolation bearings became better and better with the increase of earthquake intensities.From the energy consumption of only about 4 kN·mm under frequent earthquakes to the maximum energy consumption of about 426 kN·mm under rare earthquake,the combined measure for the structure achieved the expected shock absorption goal well.
作者
兰香
潘文
苏何先
赖正聪
余文正
LAN Xiang;PAN Wen;SU Hexian;LAI Zhengcong;YU Wenzheng(College of Architecture and Civil Engineering,Kunming University,Kunming 650214,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)
出处
《工业建筑》
北大核心
2023年第1期121-129,共9页
Industrial Construction
基金
云南省基础研究专项计划项目(202101AU070059)
昆明学院引进人才科研项目(XJ20210006)
云南省教育厅科学研究基金项目(2020J0511)。
关键词
联合减震
隔震
减震
振动台试验
方案可行性
combined damping
isolation
energy dissipation
shaking table test
feasibility scheme
