摘要
本文研究分别在ULS和SLS状态下,2种可靠度分析方法和5个因素对浅基础地基承载力可靠度指标β值的影响。用FLAC 2D模拟载荷试验得到Q-S曲线,并求出浅地基极限承载力并对其进行可靠度分析。结果表明:在ULS和SLS状态下,β值随着COVc、COVφ的增大而减小,随着Fs、Sa的增大而增大;相同情况下,Mu=1.0时求得的β值都比Mu=0.78的β值大;相同情况下FORM和MCSM条件下求得的值接近;Rs和a的变异系数较高,b的变异系数较低;基准状态下,ULS和SLS的β值都偏低。
The reliability analysis of the ultimate bearing capacity of the foundation is one of the important factors of stable foundation, and therefore were studied under ULS and SLS state, two kinds of reliability analysis methods and five factors that affect the reliability index β value of the bearing capacity of shallow foundation. Simulated load test to get Q-S curves with and obtained ultimate bearing capacity of shallow foundations and its reliability analysis using matlab language. The results show that： in the state of ULS and SLS, with the increase of COVc and COVφ, the β decreased; with the increase of Fs and Sa, the β is increased; under the same circumstances, the β in Mu = 1.0 is larger than the 13 in Mu= 0. 78; the β measured under the conditions of FORM and MCSM is similar;the coefficient of variation of Rs and a are high,and the coefficient of variation of b is low; in the reference state, the value obtained by ULS and the SLS β are low.
出处
《安徽建筑大学学报》
2016年第1期14-19,共6页
Journal of Anhui Jianzhu University
