基于黏滞阻尼器的框架结构随机地震响应分析  

RANDOM SEISMIC RESPONSE ANALYSIS OF FRAMEWORK STRUCTURE BASED ON THE VISCOUS DAMPERS

作　　者：狄生奎[1] 赵子斌[1] 李凯峰[1] 杨全胜[1] 

机构地区：[1]兰州理工大学土木工程学院,兰州730050

出　　处：《工业建筑》2013年第S1期129-132,217,共5页Industrial Construction

基　　金：甘肃省科技支撑项目(No.0708GKCA002);甘肃省自然科学基暨中青年科技基金项目(No.3ZS062-B25-031)

摘　　要：考虑到地震动具有随机性,利用平稳过滤白噪声地震动模型,首先建立黏滞阻尼结构的动力方程,运用虚拟激励法将平稳随机地震激励转化为简谐振动分析,求解黏滞阻尼结构在随机地震作用下的响应,然后通过选用相同数量的阻尼器在最大层间位移处集中布置、循环布置、权数布置三种布置方案,对比分析布置前后结构的地震反应,得出最优的黏滞阻尼器空间位置布置方案。由此可知,黏滞阻尼器具有明显的减震效果,得到的黏滞阻尼器布置建议对抗震设计和加固具有参考意义,同时使用虚拟激励法能高效快捷的求出结构的随机响应。With the randomness of earthquake motions being considered,and using a the model of stationary filtered white noise process,first the dynamic equation of the viscous damping structure was set up,pseudo excitation method is used to solve the response of viscous damping structure under random seismic excitation,which converts the stationary random seismic excitation to harmonic excitation analysis.Then according to selecting the same number of dampers,in the largest story drift with centralized arrangement and cycle arrangement,weight arrangement,it is compared as earthquake response of structures before and after arrangement,the optimal space position arrangement program of the viscous dampers is got.Thus it can be seen that the viscous damper has a obvious effect for reducing seismic response and the recommend ations of the viscous damper arrangement for the aseismatic design and reinforcement have reference significance;at the same time using pseudo excitation method can efficiently calculate the structural random response.

关 键 词：消能减震 黏滞阻尼器 虚拟激励法 随机地震反应 优化设计 

分 类 号：TU352.11[建筑科学—结构工程] TU323.5