基础隔震结构简化模型的振动参数识别  

Identification of vibration parameters of simplified base isolation models

作　　者：杜永峰[1] 张迪[1] 党育[1] 姚云龙[1] 韩建平[1] 

机构地区：[1]甘肃工业大学防震减灾研究所,甘肃兰州730050

出　　处：《世界地震工程》2001年第2期53-58,共6页World Earthquake Engineering

基　　金：甘肃省建设科技攻关基金资助项目(JK99-07)

摘　　要：针对目前隔震工程设计中模型简化方面存在的不足，以隔震体系上部结构层间剪力和隔震层位移这两个主要指标等效为目标函数，用多目标优化算法建立了等代体系刚度及质量的参数识别数字模型，并针对工程设计需要，导出了等代参数的简化计算表达式。工程实例计算表明，用本文简化模型分析得到的上述两个指标结果与原结构的响应时程曲线基本吻合，时域响应峰值的相对误差小于３％。Taking the insufficiency in model simplification of base isolation design into account, a mathematical model for indentification of parameters, the equivalent stiffness and mass, is established using multi-objective optimization algorithm. In the model, two main indices, the equivalent interstory shear forces in the superstructures and the equivalent displacement of the isolator, are taken as the objective functions. A simplified formula is derived for the equivalent parameters. It is shown by the numerical example that using the simplified method presented in this paper, the time history curves of the the dynamic responses associated with two main indices are approximately identical with that of prototype structure, and the relative errors of the peak values of the time domain response are less than 3%.

关 键 词：系统识别 基础隔震结构 动力学 振动控制 层间剪力 层位移 多目标优化算法 

分 类 号：TU352.12[建筑科学—结构工程]