摘要
本文基于能量比准则,推导出结构-地基体系振型阻尼比的计算公式。只要根据文中给出的公式,先计算出体系的基ω_1及基本振型阻尼比ξ_1,就可计算出结构-地基体系的振型阻尼比。这个概念还可推广用于结构-桩-地基体系的振型阻尼比计算。
In this paper, based on the principle of energy consideration. approximate formulas for evaluating the modal damping ratio are derived for soil-structure systems. Using the numerical results of the fundamental frequency ω_1 and the damping ratio ξ _1 of fundamental mode calculated from formulas given in this paper, the modal damping ratio for a soil-structure system can be determined. The concept of the method presented in this paper can be extended to evaluate the damping ratio of soil-pile-structure system.
出处
《振动工程学报》
EI
CSCD
1992年第2期157-161,共5页
Journal of Vibration Engineering
关键词
地震反应分析
土结构
振型阻尼比
seismic response analysis
soil structure
modal damping ratio
soil-structure system
principle of energy consideration
