混合控制结构的多维动力分析与优化设计  

Structural hybrid control with MRD and sliding base-isolation under bi-directional earthquakes

作　　者：张延年[1] 李宏男[1] 

机构地区：[1]大连理工大学

出　　处：《土木工程学报》2007年第8期8-15,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(50508008);建设部研究开发项目(06-k1-22);辽宁省教育厅高等学校科研项目(2005343);博士后科学基金(20060400971)

摘　　要：为了改善滑移隔震结构的减震效果,并研究双向耦合地震作用对减震效果的影响。提出3种磁流变阻尼器(MRD)与滑移隔震混合方案,建立双向耦合地震作用下MRD与滑移隔震混合控制结构的动力分析模型,对6层MRD与滑移隔震混合控制结构进行地震反应分析。结果表明3种混合方案在不同工况荷载作用下的相对加速度峰值、相对速度峰值、相对位移峰值和层间剪力峰值分别比滑移隔震结构有不同程度的降低。当考虑竖向地震作用的存在时,随着竖向地震作用的增大,结构的地震反应有小幅度的增加,但各混合方案在各种工况下的各项地震反应均得到较好的控制,而混合方案3的控制效果更加明显。建立MRD与滑移隔震混合控制结构优化设计模型,采用IHGA程序对混合方案3进行优化设计。结果表明,MRD与滑移隔震混合控制结构的各项地震反应均得到更好的控制。In order to improve the effect of shock absorption of sliding base-isolated structures, and to study the influence of the coupled action of earthquake in both horizontal and vertical directions on vibration control structures, three types of hybrid schemes with magnetorheological damper （MRD） and sliding base-isolation are proposed. The theory of hybrid structure with MRD and sliding base-isolation under the coupled action of earthquakes in both horizontal and vertical directions is studied. A dynamic analysis model for hybrid structures is formulated, and the kinematic differential equation developed. Seismic response analysis of a 6-storey hybrid structure with MRD and sliding base-isolation is carried out. Comparison of the results of dynamic analysis indicates that various seismic responses of the three hybrid schemes with MRD and sliding base-isolation under various loading conditions have better control than sliding isolated structures, and that the third hybrid scheme is the best. An optimal model for hybrid structure with MRD and sliding base-isolation is established to optimize the control on the various earthquake responses of hybrid structures with MRD and sliding base-isolation.

关 键 词：混合控制 滑移隔震结构 MRD 耦合地震作用 结构优化 改进遗传算法 混合遗传算法 

分 类 号：TU311.3[建筑科学—结构工程]