三维隔震振动台试验研究  

Experimental study on three-dimensional seismic isolation

作　　者：魏陆顺[1] 刘雷斐 梁欢文 

机构地区：[1]佛山科学技术学院,广东佛山528000 [2]广州大学,广东广州510405

出　　处：《土木工程学报》2014年第3期33-38,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(51078098;51378135;51308331)

摘　　要：震中大分量水平与竖向地震作用导致大量建筑结构破坏。目前,隔震系统仅能减小水平地震作用,而三维隔震系统可有效控制结构的竖向和水平反应而减轻地震灾害。由于三维隔震系统竖向和水平自振频率低,三维地震作用下,结构摇摆反应难以控制。为解决这一难题,设计了一种新型的三维隔震系统,该系统包括水平隔震层和竖向隔震层,抗摇摆装置安装在竖向隔震层中用于控制结构摇摆反应。为验证该三维隔震系统性能,对二层钢框架结构模型进行了振动台试验研究。振动台试验结果表明,三维隔震技术能有效减小上部结构响应,并大大提高建筑结构的抗震安全性。Many buildings were destroyed by large horizontal and vertical motions under epicentral earthquakes in the past. Seismic isolation systems are effective to reduce the horizontal earthquake responses of structures. However, threedimensional isolation system can reduce earthquake damage by controlling both horizontal and vertical motions. Due to the inherent low natural frequency property of 3 D isolation systemin horizontal and vertical directions, it is hard to control the rocking motion of buildings under the three dimensional seismic actions. To solve the problem, a new 3 D isolation system with both the horizontal isolation layer and the vertical isolation layer, is designed by in which the rocking suppression devices is installed in the vertical layer to control upper structure rocking motion. To confirm the performance of the 3 D isolation system, shaking table tests were conducted on a two-storey steel structure model. The test results show that the 3D isolation system can effectively reduce the superstructure reactions and greatly improve the safety of the structure.

关 键 词：三维隔震 竖向隔震 摇摆控制 振动台试验 

分 类 号：TU352.1[建筑科学—结构工程]