岩土工程可靠度关于强度参数分布函数概型的敏感度分析

THE SUSCEPTIBILITY ANALYSIS OF RELIABILITY FOR THE PROBABILITY DISTRIBUTION TYPES OF PARAMETERS IN STRENGTH CRITERION

应用岩土工程可靠度计算中常用的一次二阶矩（ＦＯＳＭ）法，以ＭｏｈｒＣｏｕｌｏｍｂ准则的抗剪强度参数ｃ，φ为例，针对各种不同分布函数概型对可靠度指标的敏感度进行了定量分析。结果表明，岩土工程可靠度计算中分布函数概型引起的可靠度误差不容忽视。

Some methods are introduced to estimate the reliability index β. The susceptibility of several functions of probability distribution types to reliability index is analyzed. Based on Mohr Coulomb strength criterion, the susceptibility to reliability for probability distribution types of parameters is analyzed. Three conclusions are proposed. A useful suggestion is given for geotechnical engineers.