摘要
目前基于性能的抗震评估主要考虑结构的最大位移反应,而忽略了滞回耗能对其造成的影响,不能全面反应地震损伤的根本机理。该文基于非线性振动理论,结合地震波的关键性特征参数,得到计算SDOFS滞回耗能的解析方法。在此基础上,根据MDOFS结构与等效SDOFS结构之间最大变形和滞回耗能的近似转换关系,采用Park-Ang模型对结构整体抗震性能作出合理评估。该方法能反应地震损伤的根本机理,且精度较高,具有广泛的工程应用前景。
Currently,the seismic performance estimation is mainly based on the maximum structural displacement response caused by earthquake,while the seismic damage mechanism can not be revealed since the influence of hysteretic energy is ignored.In this paper,considering the characteristic parameters of seismic wave,an analytic method for calculating the SDOFS hysteretic energy is deduced based on non-linear vibration theory.Furthermore,the approximate relationship is established to convert the deformation and the hysteretic energy of MDOFS structure into that of equivalent SDOFS,and the Park-Ang model is applied to evaluate the overall seismic performance of structures.This method can reflect the mechanism of seismic damage,and is relatively high accurate,hence it can be widely used in engineering.
出处
《工程力学》
EI
CSCD
北大核心
2010年第3期123-131,共9页
Engineering Mechanics
基金
国家自然科学基金项目(50678064)
长沙市科技局项目(k0901083-11)
