【摘要】 本文首先分析了基于刚性地基结构体系设计的AMD控制器控制SSI体系地震反应的基本原理和方法。然后,采用LQR方法通过仿真分析对基于刚性地基结构体系设计的AMD控制器控制SSI体系的适用性进行了研究,结果表明当SSI体系的基频与刚性地基结构体系的基频比ωs/ωr大于0.9时控制效率基本和考虑SSI效应控制器的控制效果接近,当ωs/ωr值小于0.4的时候,控制效率降低比较严重,对SSI体系不能起到控制作用。接着,对4种控制器及三种土体条件SSI体系进行了AMD主动控制的振动台模型试验,试验结果表明当土体相对较硬时基于刚性地基结构体系设计的AMD控制器可以控制SSI体系的反应,但土体相对较软时这种AMD控制器不能控制SSI体系的反应,甚至放大结构的反应。最后,设计和完成了上部两层框架SSI体系地震反应AMD控制的小型振动台试验,试验结果进一步验证了仿真分析的结论。更多还原

【Abstract】 The fundamental principle and method of AMD controller based on the fixed-base structure to control SSI system is interpreted firstly.Then the applicability of AMD controller based on fixed-base structure to control SSI system is studied by simulation analysis using LQR algorithm.The results show that the AMD controller designed for the fixed-base structure can control SSI system effectively,when the ratio of the frequencies of the SSI system to the fixed-base structure ωs/ωr is lager than 0.9.However,when ωs/ωr is smaller than 0.4,this kind of controller is not suitable to control SSI system.Thirdly,the shaking table tests about AMD control SSI system built on three kinds of soils are carried out using four kinds of AMD controllers.The test results indicate that when the soil foundation is stiff enough,the controllers work very effectively,but when the soil foundation is soft,the controllers can not control the response of SSI system,even cause larger deformation and acceleration of the structure.Finally,the shaking-table test for AMD control of an SSI system with two-floor frame is designed and made,the test results further confirm the conclusions of the simulation analysis.更多还原