摘要
为解决在大变形条件下,隔震支座阻尼力不足的问题,提出一种常阻尼隔震支座。该支座的特征是在传统橡胶支座基础上,竖向并联金属摩擦阻尼器,将二者组合成橡胶与摩擦阻尼器组合而成的新型隔震支座,实现支座在大变形下等效阻尼比不明显降低。通过阻尼器的性能试验,验证了本文构造的可行性;基于SAP2000软件对某隔震框架结构进行分析,对比研究铅芯橡胶支座、常阻尼隔震支座的隔震效果,结果表明常阻尼支座在控制隔震层位移方面具有更大的优势。
In order to solve the problem of insufficient damping force of isolation bearing under the condition of large deformation,a kind of constant damping isolation bearing composed of metal friction damper and lead rubber bearing is put forward. Based on the traditional rubber bearing,this bearing is a new type of isolation bearing composed of rubber and friction damper,which is vertically connected with metal friction damper. It makes the equivalent damping ratio of the bearing almost unchanged with the change of displacement under large deformation,and overcomes the defect that the energy consumption capacity of the isolation layer controlled by the traditional rubber bearing under large deformation. SAP2000 software is used to analyze the seismic response of a frame structure. In the model,lead rubber bearings,lead rubber and friction composite bearings and natural rubber and friction composite bearings are added to the isolation layer respectively. The results show that the new bearings have greater advantages in controlling the displacement of the isolation layer under rare earthquake.
作者
王英卓
田杰
焦德民
Wang Yingzhuo(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China)
出处
《建筑科学》
CSCD
北大核心
2020年第1期123-129,共7页
Building Science
基金
国家自然科学基金面上项目(51578029).
关键词
隔震支座
隔震层位移
地震反应分析
isolation bearing
displacement of isolation layer
seismic response analysis
