考虑SSI效应的铅芯橡胶支座隔震结构体系振动台模型试验  

Shaking Table Model Test on Lead Core Rubber Bearing in Isolation Structure System Considering SSI

作　　者：于旭[1,2] 宰金珉[2] 王志华[2] 

机构地区：[1]南京工程学院建筑工程学院,南京211167 [2]南京工业大学土木工程学院,南京210009

出　　处：《南京航空航天大学学报》2010年第6期786-792,共7页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(50678083)资助项目

摘　　要：设计并完成了考虑土-结构动力相互作用(SSI效应)的铅芯橡胶支座隔震结构体系振动台模型试验,对比分析了土性地基和刚性地基上隔震结构体系的动力特性、基础及隔震层的转动效应、楼层加速度反应,探讨了SSI效应对隔震结构体系隔震效果的影响。试验结果表明:由于SSI效应的影响,土性地基上隔震结构体系的隔震效率较刚性地基时明显降低,SSI效应对隔震结构体系隔震效率的影响与输入地震动的峰值及频谱特性有关。因此,对建于土性地基上的隔震结构进行设计时,考虑土-结构动力相互作用是十分必要的。Shaking table model tests are designed and carried out,and the model systems in the tests are lead core rubber bearing isolation structure systems.The model systems consider soil-structure interaction（SSI）.The isolated structure system on the soil site and the fixed base are compared.Dynamic characteristic,turning effects of the base and isolation layer and floor acceleration response,effects of SSI on the isolated structure are studied.Test results show that isolated effects on the soil site are lower than that on the fixed base because of SSI,peak value and frequency spectrum of inputted earthquake motion are influencing factors when SSI is considered in the seismic isolated structure system.Therefore,effects of SSI are considered in the design when the seismic isolated structure is built on the soil site.

关 键 词：振动台模型试验 铅芯橡胶支座 隔震结构 土-结构相互作用 

分 类 号：TU311[建筑科学—结构工程]