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粉土的液化问题具有一定的模糊性,本文试将模糊数学的综合评判方法应用到预测粉土场地地震液化的研究中。文中构造了与各不同因素对应的不同等级的隶属函数,建立了评判矩阵,并概据不同因素在评判中所起的作用,拟定了相应的权重,运用M(·,+)算子,进行模糊矩阵运算。最后,基于评语等级的内涵,在评判结果中考虑了液化与非液化的总偏重,将前后两部分的隶属度总和起来,进行最终评判。通过对唐山地震(124个)、海域地震(4个)液化资料进行的验证综合评判,获得液化判别成功率为86%、非液化判别成功率为78%的令人满意的结果。
The liquefaction problem of silt soil has some ambiguity. This paper tries to apply the comprehensive evaluation method of fuzzy mathematics to the prediction of earthquake liquefaction in silt site. In this paper, different levels of membership functions corresponding to different factors are constructed, and a judging matrix is established. Based on the role of different factors in the judging process, corresponding weights are formulated, and the M(·,+) operator is used. Fuzzy matrix operations. Finally, based on the connotation of the rating level, the overall emphasis on liquefaction and non-liquefaction is considered in the evaluation results, and the degree of membership of the two parts is summed up for final evaluation. By comprehensively evaluating the liquefaction data of the Tangshan earthquake (124) and the sea area earthquake (4), a satisfactory result with a liquefaction success rate of 86% and a non-liquefied success rate of 78% was obtained.