摘要
本文对在考虑地震烈度和场地土分类的模糊性的基础上所建立的含模糊参数的地震地面运动随机过程模型,采用分步等效线性化及状态方程法,求出了结构模糊随机变形和能量反应的统计矩;基于单参数(变形或能量)及双参数(变形和能量)的模糊破坏准则,分析了抗震结构的模糊随机动力可靠性。最后给出了两个自由度结构的数值算例,表明双参数准则更为合理和安全。
In this paper,a method is presented for analysing the fuzzy random dynamicalreliability of aseismic structures based on the double damage criterion.Firstly,thestatistical moments of fuzzy random deformation and cumulative energy are obtainedby simulating the earthquake ground motion as a random process with a fuzzy para-meter and using the equivalent linearization technique.Secondly based on the single(deformation or cumulative energy)and double(deformation and cumulative energy)fuzzy damage criteria,the each fuzzy random dynamical reliability of a multi-degree-of-freedom structure subjected to earthquake is analysed.Finally,a numericalexample of a structure of two degree-of-freedom is given.
出处
《振动工程学报》
EI
CSCD
1991年第2期1-9,共9页
Journal of Vibration Engineering
基金
霍英东教育基金和国家自然科学基金
关键词
抗震结构
可靠性
模糊烈度
aseismatic structure
reliability
fuzzy earthquake intensity
fuzzy safe criterion
fuzzy random dynamical reliability
