Reliability analysis of deteriorating structural systems
Reliability analysis of deteriorating structural systems
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DOI：
10.1016/j.strusafe.2019.101877
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发表时间：
2020
影响因子：
5.8
通讯作者：
D. Štraub;R. Schneider;E. Bismut;Hyun-joong Kim
中科院分区：
文献类型：
--
作者：
D. Štraub;R. Schneider;E. Bismut;Hyun-joong Kim
劣化结构系统的可靠性分析需要解决时变可靠性问题。在一般情况下，结构的承载能力和荷载都随时间变化。这种分析可以通过一系列时不变可靠性问题的近似来实现，对于时变可靠性问题的直接解具有挑战性的情况下，这是一种潜在的有效策略，例如对于具有多个元件的结构系统或任意加载过程。在这篇文章中，我们彻底回顾了等价时不变可靠性问题的表述，并将这一近似推广到有检查和监测数据的结构。然后，我们给出了随着时间推移有效评估可靠性的方法。特别是，我们提出了基于抽样的方法与一种形式(一阶可靠性方法)相结合的方法来处理在寿命可靠性计算中出现的串联系统可靠性问题。通过一组算例对该框架和算法进行了验证，其中包括基于检验数据的可靠性计算。
Reliability analysis of deteriorating structural systems requires the solution of time-variant reliability problems. In the general case, both the capacity of and the loads on the structure vary with time. This analysis can be approached by approximation through a series of time-invariant reliability problems, which is a potentially effective strategy for cases where direct solutions of the time-variant reliability problem are challenging, e.g. for structural systems with many elements or arbitrary load processes. In this contribution, we thoroughly review the formulation of the equivalent time-invariant reliability problems and extend this approximation to structures for which inspection and monitoring data is available. Thereafter, we present methods for efficiently evaluating the reliability over time. In particular, we propose the combination of sampling-based methods with a FORM (first-order reliability method) approximation of the series system reliability problem that arises in the computation of the lifetime reliability. The framework and algorithms are demonstrated on a set of numerical examples, which include the computation of the reliability conditional on inspection data.