毗邻建筑考虑局部场地效应时的LQG控制  

LQG control problem of adjacent buildings considering local site effect

作　　者：于骁[1] 张文首[1] 林家浩[1] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室

出　　处：《地震工程与工程振动》2007年第6期197-202,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(10472023)

摘　　要：本文基于虚拟激励法和留数定理推导出毗邻建筑考虑局部场地效应时在平稳随机地震激励下的LQG控制问题的闭合解。利用此闭合解进行场地土参数研究表明,场地土参数对位移和加速度响应的影响是不同的,甚至是相反的。因此对于给定的LQG控制加权阵Q和R,场地土的卓越频率和阻尼比变化对减震效果有显著影响,应予以重视。Based on the pseudo excitation method and the residue theorem, this paper provides the closed-form solutions of LQG control for adjacent buildings under stationary random seismic excitations when considering local site effect. By using the closed form solution, parametric studies show that the effect of parameters of local site on the displacement and acceleration responses are different, or even opposite. For given weighting matrices Q and R, it is shown that the variations of predominant frequency and damping of the site soil may have significant effects on the effectiveness of reducing seismic responses and should not be neglected.

关 键 词：毗邻建筑 地震响应 局部场地效应 闭合解 LQG控制 

分 类 号：P315.96[天文地球—地震学]