对退化结构的时变可靠度，抗力必须表为随机过程。
The resistance of deteriorating structures is a non-stationary stochastic process.
算例表明，该方法简便易行，是评价和计算复合材料时变可靠度的有效方法。
Numerical examples show that the present method is simple and effective for evaluating and calculating the time-dependent reliability of composites.
基于模糊评价和马尔科夫过程，研究了在役桥梁承载力可靠度的时变规律。
The time-varying reliability of existing bridge on bearing capacity was discussed based on fuzzy evaluation and Markov process.
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