Abstract: The gradient optimization algorithm based on the stochastic finite element Was adopted to analyze the reliability of the frame with stochastic parameters. A computer procedure was programed and a contrast was carried out between the conpute letsult of this method and that of the Monte Carlo method.The conclusion iS proved that this method used in the frame reliability analysis is feasible and reliable.This method not only has avoided the oversized 1oad of Monte Carlo computation，but also is more reasonable than the traditional definite value analysis method more close to the reality.

Key words: frame, reliability, SFEM, gradient optinfization

摘要： 基于随机有限元的梯度优化算法引人拥有随机参数的框架可靠度分析．并编制计算程序与精确解Monte—Carlo 法的计算结果进行了对比，证明该文方法用于框架结构可靠度分析是可行、可靠的，既避免了Monte—Cado法计算量 过大的缺点，又比传统的定值分析方法更合理，更贴近实际．

关键词: 框架, 可靠度, 随机有限元, 梯度优化