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本文在建筑抗震设计规范(GBJ11-89)中有关液化势判别和液化危害评价规定的基础上,提出了一种考虑随机性和模糊性的新液化危害评价方法,与以往的研究相比,此法有以下特点: 1.文中分析了整个土层柱状的液化概率,而不只是研究一定深度上土层的液化概率; 2.文中应用隶属函数关系将液化危害等级划分建立在模糊集合论的基础之上; 3.对整个土层柱状的液化危害评价采用了模糊概率方法,从而为考虑各种不确定性影响提供了可能性。 本文的研究为将地基基础抗震设计方法建立在可靠度理论的基础之上提供了一定的依据。
This paper proposes a new liquefaction hazard assessment method that considers randomness and ambiguity on the basis of the liquefaction potential discrimination and liquefaction hazard assessment regulations in GBJ11-89, which is compared with previous studies. The method has the following characteristics: 1. The paper analyzes the column liquefaction probability of the entire soil layer, not just the liquefaction probability of the soil layer at a certain depth; 2. The membership function of the paper establishes the liquefaction hazard classification based on the fuzzy set theory. Above; 3. The evaluation of the liquefaction hazard of the entire soil column using a fuzzy probability method, which provides the possibility to consider the effects of various uncertainties. The research in this paper provides a certain basis for building foundation-based seismic design methods based on reliability theory.