耦合多层框架结构在多点激励作用下的动力响应:频域分析  

On the Dynamic Response of a Coupled Multi-Story Framing Structure Under Multi-Point Excitation——An Analysis of Its Frequency Domains

作　　者：杨治东[1] 吕玉梅[1] 杨石柱[1] 骆宪龙[1] 沈红云[2] YANG Zhidong;LV Yumei;YANG Shizhu;LUO Xianlong;SHEN Hongyun(Shijiazhuang Vocational Institute of Railway Technology,Shijiazhuang 050041,China;Heibei Jiaotong Vocational Technical Institute,Shijiazhuang 050030,China)

机构地区：[1]石家庄铁路职业技术学院,河北石家庄050041 [2]河北交通职业技术学院,河北石家庄050030

出　　处：《国防交通工程与技术》2018年第6期18-21,共4页Traffic Engineering and Technology for National Defence

摘　　要：基于随机地震动的功率谱模型,建立了多点地震激励下耦合结构振动方程,并数值模拟了两个耦合框架结构的地震反应,并与一致激励下的结果进行了比较。结果显示,对于一致地震激励的响应,与耦合结构处于中等刚度的场地时对多点激励的响应相近;当耦合结构位于软土场地时,一致激励引起的响应偏大;而当位于硬岩场地时,多点激励会对耦合结构产生不利影响。Based on the power spectrum model of a random earthquake,the equation for the vibration of a coupled structure under multi-point excitation is established in the paper,with the earthquake response of two coupled framing structures numerically simulated.The simulated result is compared with that of the coupled structure under the uniform excitation.The result of the comparison shows that the earthquake response of a coupled structure under the uniform excitation is similar to that of a coupled structure on a medium-rigidity ground under the multi-point excitation.When the coupled structure is located in a soft-soil field,the response of the coupled structure under the uniform excitation tends to be greater.When the coupled structure is located in a hard-rock field,the multi-point excitation may have an unfavorable effect on the coupled structure.

关 键 词：耦合结构 多点激励 动力响应 相干效应 

分 类 号：TU375.4[建筑科学—结构工程] TU311.3