|The Reliability Analysis of the Bearing Capacity of the Swallow Foundation
|中文关键词: 可靠度分析方法 地基极限承载力 可靠度指标 ULS SLS
|英文关键词: the methods of reliability analysis ultimate bearing capacity reliability index ULS SLS
| 地基极限承载力可靠度分析是研究地基稳定的重要因素之一，因此研究分别在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，用matlab语言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 research, therefore, this paper, under ULS and SLS state, studies two kinds of reliability analysis methods and the effect that five factors have on the reliability index β value of the bearing capacity of shallow foundation. Simulated load test has been carried to get Q-S curves and ultimate bearing capacity of shallow foundations and its reliability analysis can be obtained by 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 β 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.