基于均匀试验设计的结构可靠指标计算方法

基于可靠指标的几何原理，结合均匀试验方法设计试验点均匀分散的特点，提出了一种基于均匀试验方法求解结构可靠指标的实用计算方法。该方法不需求偏导数，适合于求偏导数难和偏导数不存在的可靠指标求解问题。经算例验证，该方法简便实用，且具有令人满意的计算精度和计算效率，同时将该方法应用于一实际斜拉桥桥塔强度可靠指标计算，也具有良好效果。本文方法为结构可靠指标计算提供一种新的有效途径。

A Reliability Index Computation Algorithm Based on Uniform Sampling Method

Based on the geometrical theory of the reliability index and taking advantage of the uniformly distributed design points by the uniform sampling method, a reliability index computation method is presented in this paper. The proposed method does not need to calculate the partial derivatives of the performance function, and it is suitable for eases when partial derivatives are not available or are difficult to calculate. The method is characterized by verification examples. It is simple, and convenient with good accuracy and high efficiency. The same effect is achieved the strength reliability index calculation for a cable stayed bridge tower.