作　　者： ; ; ;

机构地区： 广州大学

出　　处： 《工程抗震与加固改造》 2007年第3期41-47,共7页

摘　　要： 本文将隔震技术应用到大平台多塔楼结构中,研究了这种新型隔震体系的抗震性能,并将磁流变(MR)阻尼器设置于隔震层,探讨了这种新型隔震体系智能磁流变控制的减震效果。文中以北京通惠家园某典型小区为研究对象,建立了大平台多塔楼新型隔震减震体系的运动方程,考虑了隔震支座的非线性。本研究中MR阻尼器的半主动控制算法选用限幅最优控制算法,其主控制器采用H2/LQG方法来设计。仿真分析结果表明,这种新型隔震体系可以有效地减小上部住宅结构与下部平台的地震反应,为提高大平台多塔楼结构的抗震安全性提供了一条崭新的途径。采用MR阻尼器与这种新型隔震体系相结合可以进一步减小隔震结构下部平台的地震反应与隔震层的非线性反应,提高这种新型隔震体系的抗震安全性。 In this paper, the seismic isolation technique is applied to multi-tower structure on a large platform, and the seismic performance of the new isolated system are studied. Further, semi-active MR dampers are considered to be installed in the isolation level, whose performance is systematically compared with active, passive-on and passive-off control strategies. In this study, a typical structure of Tonghui residential garden in Beijing is used as an object in which the seismic isolation technique and MR dampers are exploited for mitigation of seismic hazards. The equation of motion of the new seismic isolation system is established and nonlinear behavior of isolation bearings are considered in formulating the bilinear force-deformation relationship. The clipped-optimal control algorithm is chosen for the semiactive control of MR damper and, an H2/LQG control algorithm is selected for the design of primary controller to determine the ideal force of MR dampers. Results of simulation show that the new seismic isolation system can reduce the seismic responses of both the superstructure and the platform effectively, offering a new means of improving the anti-seismic behavior of the whole structure system. Combing MR dampers with the new seismic isolation system can achieve much more response reduction in the platform and isolation level and improve the seismic safety of the type of complicated structure.

关 键 词： 隔震 磁流变阻尼器 智能控制 大平台多塔楼结构

领　　域： [建筑科学]