三维基础隔震结构多维地震反应的非线性分析  

Nonlinear analysis of multi-dimensional seismic response in 3D base isolated structure

作　　者：熊世树[1] 陈金凤[1] 梁波[1] 苏经宇[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]北京工业大学抗震减灾研究所,北京100022

出　　处：《华中科技大学学报（自然科学版）》2004年第12期81-84,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (5 0 2 780 93)

摘　　要：提出了一种铅芯橡胶碟簧三维隔震支座 (3DB) ,它由铅芯叠层橡胶支座LRB和加有阻尼材料的碟形弹簧支座DSB串联组成 ,3DB能有效解决三维隔震支座竖向阻尼的难题 ,并可以有效地抑制摇摆 .建立了 3DB三维隔震框架结构多维地震反应的非线性分析模型及其运动方程 ,并以一栋平面为L形的五层 3DB三维基础隔震框架结构为例 ,对其多维地震反应进行了计算机仿真分析 .结果表明 ,本系统的三维隔震效果十分明显 ,地震反应降低了 5 0 %以上 .The three dimensional lead-rubber dish-spring bearing (3DB) was proposed. The 3DB was composed of Lead Rubber Beading (LRB) and Dish-Spring Bearing with damper (DBS) in series. The proposed 3DB was effective in the resolution of difficulty in vertical damping of 3D isolation bearings, and in the suppression of the rocking motion. The analytical model and motion equation of multi-seismic responses of 3D base isolated frame structure was established, a five-story frame structure was taken as an example and an extensive simulation analysis was carried out. The analysis results showed that the 3D base-isolated structure with the proposed 3DB was effective in 3D isolation. It can reduce 50% seismic responses compared with the non-isolation structure.

关 键 词：三维隔震 三维隔震支座 多维地震反应 铅芯橡胶支座 碟形弹簧支座 

分 类 号：TU352.11[建筑科学—结构工程]