摘要
本文进一步研究了地震烈度的两种模糊定量评定方法。 第一种方法是基于具有任意分布形态的模糊指标的烈度评定方法。这是一种不受正态分布假定约束的一般性方法。重点研究了以建筑物破坏为特征指标从Ⅵ度到Ⅺ度的模糊烈度评定。从26份有关地震烈度的报告中收集了约2300个有关建筑物破坏的资料,作出了不同类型建筑物在不同烈度下的分布曲线,并得出了它们的近似解析逼近式。采用模糊模式识别与贴近度方法,具体研究了单点评定和群体评定两种情况。 第二种方法是从模糊烈度出发的地震烈度评定方法,主要是对模糊烈度的清晰化作了简化,省去了清晰化过程中的贴近度运算,而改用量板法,更易于分析处理。 最后给出了两个应用实例。
In this paper, two fuzzy methods for quantitative evaluation of earthquake intensity are researched further.The first method is based on the fuzzy indices characterized by arbitrary distributions. The fuzzy evaluation of intensities from Ⅵ to Ⅺ degrees based on the damage data conditions of buildings has been studied with emphasis. According to about 2300 building damage data collected from 26 reports on earthquake intensities in China, the distribution curves and their approximate analytic functions have been constructed for the different intensities in the different cases of damage conditions of buildings. The single-point fuzzy evaluation and the group fuzzy evaluation are investigated by adopting the method of fuzzy pattern recognition and the fuzzy method of degree of approaching.The second method is based on the concept of fuzzy intensity. Its main part consists in the simplification of clearness procedure of fuzzy intensity. Namely, a diagram method is used instead of calculating the degrees of approaching.Finally, two actual examples of application of the described methods are shown.
出处
《地震工程与工程振动》
CSCD
北大核心
1989年第2期45-56,共12页
Earthquake Engineering and Engineering Dynamics
基金
国家地震局地震科学联合基金
