西安地区活动断裂活动性的Fuzzy-Grey模式评价  

FUZZY-GREY MODEL ASSESSMENT FOR ACTIVITY OF FAULTS IN XI′AN

作　　者：孙芳强[1,2] 苏生瑞[1] 彭建兵[1] 

机构地区：[1]长安大学地质工程与测绘学院,西安700054 [2]中国地质调查局西安地质调查中心,西安700054

出　　处：《工程地质学报》2010年第2期183-188,共6页Journal of Engineering Geology

基　　金：国家自然科学基金重点项目(4053021)

摘　　要：对活动断裂的活动强度进行研究,不仅是预测地震的发生、减轻地质灾害的基础,也是城市工程设计的核心问题。本文基于断裂活动性评价所具有的模糊性和灰色性特点,将模糊数学与灰色系统有机结合,提出了断裂活动性评价的模糊综合评判模型,确定了梯形隶属函数,并采用"活动性标志的相对值大,权重大"的原则确定了各个指标的权重,最终获得了断裂活动性的评判结果。利用该模式对西安地区活动断裂的活动性进行了评价,结果表明:临潼—长安断裂活动性最强,其次是渭河断裂、咸阳断裂,余下—铁炉子断裂活动性最弱。Estimating the activity of faults is not only the basis to predict earthquake and to reduce geological disasters,but also is the core issue of urban engineering design.Based on fuzzy and grey characteristics in assessment of fault activity,a fuzzy-grey model of assessment is proposed in the frame work of fuzzy mathematical theory associated with grey system.This paper establishes the fuzzy integrate assessment model and decides a trapezoidal membership function using the fuzzy mathematics.The power of each factor is decided with the principle that the relative value of activity symbol is larger,the power is greater.This model is applied to the assessment of fault activity in Xi′an area.The result shows that the activity of Lintong-Chang′an fault is the strongest and that of Yuxia-Tieluzi fault is the weakest.

关 键 词：活动断裂 活动性 模糊 灰色 梯形隶属函数 

分 类 号：P642[天文地球—工程地质学]