摘要
提出了模块式金属隔震支座的构造与解耦设计方法,通过电流互感器振动台试验验证了隔震装置和设计方法的可行性。研究结果表明:隔震支座具有良好的隔震效果,隔震设备顶部加速度响应为非隔震设备的7.32%~32.57%;隔震支座具有良好的自复位能力,实际残余位移在不同地震动类型、地震动强度下均小于设计值。隔震支座具有较强的抗倾覆能力,可满足支柱类电气设备层间隔震需求,竖向地震输入影响时隔震支座的性能有所削弱,变形增大。电气设备的隔震设计应充分考虑设备本体的抗震性能与支架的动力放大作用,慎重选择隔震设计目标,避免支座达到极限位移。
The structure of modular metal seismic isolation bearing(MMSIB)is proposed and decoupled design method is developed.The effectiveness of MMSIB is verified using shaking table test of a current transformer(CT).The results show that MMSIB exhibits excellent isolation performance.The acceleration response at the top of CT can be reduced to 7.32%~32.57%of non-isolated specimen.The MMSIB has good self-centering ability with limited residual deformation.The actual residual deformation of MMSIB is less than the design value ignoring the input ground motion types and earthquake intensities.Sufficient anti-overturning ability provided by MMSIB satisfies the requirement of inter-layer seismic isolation of electrical equipment with supports.The vertical ground motion has negative effect on MMSIB that enlarges the horizontal deformation.The dynamic amplification effect of support and inherent capacity of electrical equipment should be considered in seismic isolation design.The design objective should be carefully determined to avoid reaching the ultimate deformation of MMSIB.
作者
张毅
夏旭忆
李海洋
尚庆学
李吉超
刘如山
王涛
ZHANG Yi;XIA Xu-yi;LI Hai-yang;SHANG Qing-xue;LI Ji-chao;LIU Ru-shan;WANG Tao(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin,Heilongjiang 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin,Heilongjiang 150080,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《工程力学》
EI
CSCD
北大核心
2024年第10期212-224,共13页
Engineering Mechanics
基金
中国地震局工程力学研究所基本科研业务费专项项目(2021EEEVL0310)
国家自然科学基金青年科学基金项目(51908519)
黑龙江省自然科学基金项目(LH2020E023)
中国博士后科学基金项目(2021M701937)。
关键词
模块式金属隔震支座
振动台试验
设计方法
抗倾覆
自复位
modular metal seismic isolation bearing
shaking table tests
design method
anti-overturning
self-centering
