The main conclusions obtained in this thesis are as follow:(1) Based on FOSM, Second-order second-moment method modifies the results of FOSM, and has better calculation accuracy.
本文的主要结论有：（1）二次二阶矩法是以一次二阶矩法为基础，并对一次二阶矩法的计算结果进行二次修正，在多数情况下有着更好的计算精度。
The mean-value-first-order-second-moment method and advanced first-order-second-moment method are used to analyze the aseismatic serviceability of water supply network.
借鉴结构可靠度分析方法，给出了供水管网抗震功能可靠度分析的一次二阶矩方法。
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