摘要
在Kelly等人研究的基础上,以结构周期、总基底剪力和总基底弯矩相等为等效准则,将多自由度结构简化为与之等效的两自由度模型结构。通过对一些规则结构的数值模拟分析,给出了这个模型结构系统参数的简化计算公式。这样对简化后的等效模型结构应用振型分解反应谱法,可求出原结构考虑高阶振型影响的结构最大地震反应。其计算简单、可不依靠计算机进行。而将这种等效方法应用于高层隔震结构,可较准确的对其最大地震反应进行预测。计算实例也证明了,这种等效方法是简便可行的。这为高层隔震结构实用设计方法的研究提供了基础。
Based on research of Kelly, et al, a multiple-degree-of-freedom structure was simplified to its equivalent two-degree-of-freedom model structure according to equivalent criteria for equal structure period, total base shear and total base moment. After numerical analysis of some regular-shock-insulation building structures, simplified computing formula for system parameters of the model structure has been obtained. Thusly, maximal earthquake response of a structure can be solved by applying response-spectrum-analysis method to its corresponding equivalent simplified model structure. The equivalent simplified model structure is simple, and even computer will not be needed when the model structure is utilized. Once the equivalent method is applied to a high_rise shock-insulation structure, maximal earthquake response of the structure will be accurately forecasted. Advantages of the method have been verified by some computational examples. It implies that a practical design method is provided for the highrise shock-insulation structure.
出处
《工程力学》
EI
CSCD
北大核心
2006年第8期138-143,共6页
Engineering Mechanics
基金
广州市科技局项目(200309)
广州大学抗震中心重点实验室基金
关键词
等效准则
等效简化模型
地震反应预测
高层隔震结构
数值分析
equivalent rule
equivalent simplified model
earthquake responses forecast
highrise shock-insulation structure
numerical analysis
