岩土震害影响因子权重研究——以砂土液化为例  

Influence factor weights analysis of rock and soil earthquake damages:a case study from sand liquefaction

作　　者：盛俭[1,2] 袁晓铭[1] 王禹萌[2] 刘红帅[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]吉林省地震局,吉林长春130117

出　　处：《自然灾害学报》2012年第2期76-82,共7页Journal of Natural Disasters

基　　金：国家自然科学基金项目(41172293)

摘　　要：以砂土液化影响因子的权重计算为例,探讨了一种兼顾主、客观因素的权重确定方法。首先分别使用层次分析法和粗糙集理论计算砂土液化影响因子的主、客观权重值。然后对所得到的主、客观权重值进行检验,得到各自的预测准确性,根据对其准确性进行比较得到主、客观权重值偏好系数,最终按照偏好系数对主、客观权重值进行计算得到综合权重值。并对所得到的综合权重进行验证,其预测准确率为91.7%,说明该方法具有比较高的准确性。通过研究发现,对主、客观权重通过偏好系数进行综合,可以较好的平衡两者的影响作用,能够提高权重分析的准确性;通过对砂土液化影响因子权重的分析发现地震作用对其影响要大于土体埋藏环境和土体自身性质,在所有影响因子中有效应力的影响最大,其权重达到了0.205。A method of obtaining the weights of rock and soil earthquake damage influence factors using sand liquefaction as an example was discussed herein.First,subjective and objective weights of soil liquefaction influence factors were calculated respectively using the analytic hierarchy process and the rough set theory.Second,the preference coefficient of weights was determined by comparing the prediction precision of subjective and objective weights.Then,the integrated weight was calculated by the preference coefficient of weights.The method has a high precision with the prediction accuracy of comprehensive weights up to 91.7%.The integrated weight could balance the effect of subjective and objective factors and improve the accuracy of prediction.Through the influence factor weights analysis,it is found that earthquake action has greater effect on liquefaction than soil burial environment and soil characteristic,and the most dominant factor that influence sand liquefaction is the effective stress,whose weight reaches 0.205.

关 键 词：岩土震害 影响因子 权重 砂土液化 

分 类 号：TU43[建筑科学—岩土工程]