摘要
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。
On the basis of the stipulations related to soil liquefaction potential judgement and liquefaction hazard evaluation, a method in consideration of randomness and fuzziness of the soil liquefaction phenomenon is put forward in this paper. In comparison of the previous study on this problem, the new method proposed in the paper posseses following specialities: 1. the analysis of the liquefaction probability is refered to the whole soil profile rather than to a specified soil layer at given depth; 2. the classification of the liquefaction hazard degree is established on the basis of fuzzy set theory by use of the suggested membership function relations; 3. the liquefaction hazard evaluation for the whole soil profile is carried out through applying fuzzy-probability method that provides a possibility of incorporating the influences of various uncertainties. The results in this paper have offered some fundamental materials for setting up the seismic design method of building foundation on the basis of reliability theory.
出处
《地震工程与工程振动》
CSCD
北大核心
1992年第4期93-101,共9页
Earthquake Engineering and Engineering Dynamics
基金
地震科学联合基金
