摘要
目前浅基础极限承载力可靠度分析普遍采用简化方法,虽然进行了多次计算,但每次计算时都是采用定值参数,不能考虑土体空间的变异性。本文利用随机场理论对一刚性浅基础进行可靠度分析,采用二维随机场与Monte-carlo方法结合,将土体的粘聚力作为一个空间二维随机场,对比随机场和定值分析的结果,分析了土体粘聚力空间变异性对浅基础极限承载力及其可靠度的影响。
The simplified method is usually adopted to determine the allowable bearing capacity on shallow foundations.It means that the high spatial variation of the soil is not of consideration,because the constaint parameter is used in calculation.In this paper,the 2D random field method combined with the Monte-Carlo is used to analyze the allowable bearing capacity of the shallow foundation.The effect of the spatial variation of soil cohesion on the allowable bearing capacity and the reliability index,which is set as a spatial 2D random field in the analysis,is highlighted in this paper.
出处
《地下空间与工程学报》
CSCD
北大核心
2012年第A02期1676-1679,共4页
Chinese Journal of Underground Space and Engineering
基金
国家科技支撑计划资助项目(2012BAJ01B02)
关键词
浅基础
二维随机场
相关长度
变异系数
可靠度
shallow foundation
2D random field
correlation length
coefficient of variation
reliability
