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研究了桩式复合地基的失效模式,将模糊逻辑引入到桩式复合地基的可靠度分析中,解决了地基失效时的模糊性问题.同时利用熵原理和牛顿迭代法计算出功能函数的熵密度函数,不仅避免了对经典概率分布的依赖,而且保证了在计算中迭代的收敛性.最后利用辛普森积分公式推导出桩式复合地基的模糊失效概率公式.实例分析表明,该方法具有精度高、计算简便的优点.
The failure mode of pile composite foundation is studied, the fuzzy logic is introduced into the reliability analysis of pile composite foundation to solve the fuzziness problem of foundation failure, and entropy principle and Newton iteration method are used to calculate the entropy density Function not only avoids the dependence on the classical probability distribution but also ensures the convergence of the iterations in the calculation.Finally, the formula of the fuzzy failure probability of pile composite foundation is deduced by the Simpson integral formula.Example analysis shows that the method has the advantages of high precision, The advantages of simple calculation.