核电厂高静低动三维隔震系统的地震响应研究  

The seismic response of nuclear power plant based on high-static-low-dynamic three-dimensional isolation system

作　　者：何文福[1] 黄君量 许浩[1] 陈睦锋 MIYAMA TAKAFUMI HE Wen-fu;HUANG Jun-liang;XU Hao;CHEN Mu-feng;MIYAMA TAKAFUMI(Department of Civil Engineering,School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China;Department of Living Space Design,Tezukayama University,Nara 631-8585,Japan)

机构地区：[1]上海大学力学与工程科学学院土木工程系,上海200444 [2]帝塚山大学现代生活学部,奈良631-8585

出　　处：《振动工程学报》2023年第6期1469-1479,共11页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52078287);广西重点研发计划(桂科AB19259011);上海宝冶集团重大课题资助项目(RD2020-98)。

摘　　要：为实现核电厂隔震结构在静载阶段隔震层具有小位移的同时,动载阶段具有较好减震效果的目的,提出一种由水平隔震单元和高静低动隔震系统(由斜置橡胶支座和负刚度装置组成)组成的核电厂高静低动三维隔震系统。基于静载和动载阶段的斜置橡胶支座、负刚度装置的变形特征提出了核电厂高静低动三维隔震系统竖向理论模型,分别对斜置橡胶支座、负刚度装置以及高静低动隔震系统进行静力加载试验,结果表明斜置橡胶支座具有较好的承载力和较大刚度,负刚度装置呈现明显负刚度特性,高静低动隔震系统在动载阶段滞回曲线饱满,具有较小动刚度特征。理论模型与试验结果的对比表明所提出的高静低动隔震系统理论模型能较好反映该装置系统力学特性。进一步对核电厂高静低动三维隔震结构进行地震响应分析,结果表明该结构在静载下的变形为102.02 mm,从地震作用下核电厂上部结构和内部设备的三向加速度变化来看,该隔震结构具有良好的减震作用,减震率达到40%以上,提高了核电厂在三向地震作用下的安全性。In order to realize the small displacement of the isolation layer in the isolation structure of the nuclear power plant in the static load stage and the good shock absorption effect in the dynamic load stage,a high-static-low-dynamic three-dimensional isolation system for nuclear power plants is proposed,which is composed of a horizontal isolation unit and a high-static-low-dynamic isolation system.The high-static-low-dynamic isolation system is composed of inclined rubber bearings and negative stiffness devices.Based on the deformation characteristics of the inclined rubber bearing and the negative stiffness device in the static load and dynam‑ic load stages,the vertical theoretical model of the high-static-low-dynamic three-dimensional isolation system of the nuclear power plant is proposed.The inclined rubber bearing,negative stiffness device and high static and low dynamic isolation system are statically tested.The results show that the inclined rubber bearing has effective bearing capacity and high stiffness.The negative stiffness device exhibits obvious negative stiffness characteristics.The high-static-low-dynamic isolation system has a full hysteresis curve in the dynamic load stage and low dynamic stiffness.The comparison between the theoretical model and the test results shows that the proposed theoretical model can effectively reflect the mechanical characteristics of the system.The seismic response analysis of the high-static-low-dynamic three-dimensional isolation structure of the nuclear power plant shows that the displacement of the isolated structure under static load is 102.02 mm.The three-dimensional acceleration of the superstructure and internal equipment has an effective shock absorption effect,and the shock absorption rate exceeds 40%,which improves the safety of the nuclear power plant structure under the action of three-dimensional earthquakes.

关 键 词：地震响应 斜置橡胶支座 负刚度 高静低动三维隔震系统 核电厂 

分 类 号：TU352.12[建筑科学—结构工程]