Methods of structural systems reliability

This is the second part of an investigation of time variant structural system reliability under multiple loadings. The study is concentrated on brittle, redundant systems. The emphasis is on the consideration of load sequence, load path, and progressive failure over time. Currently available methods such as those based on an outcrossing analysis and a load coincidence consideration are critically examined. A new method based on a Markov model is also proposed. Extensive Monte Carlo simulations are carried out to verify the analytical methods. The accuracy and computational effort of each method are examined. The importance of the effect of load path and load sequence is demonstrated by numerical examples of simple parallel bars under tension and trusses with both tension and compression members.

System Reliability Under Time Varying Loads: I

Various types of structural systems are often subjected to the risk of fatigue-induced failures. If a structure does not have an adequate level of structural redundancy, local failures may initiate sequential failures and cause exceedingly large damage. For the risk-informed design and maintenance of such structural systems, it is thus essential to quantify the risk of fatigue-induced sequential failure. However, such risk analysis is often computationally intractable because one needs to explore innumerable failure sequences, each of which demands component and system reliability analyses in conjunction with structural analyses to account for various uncertainties and the effect of load redistributions. To overcome this computational challenge, many research efforts have been made to identify critical failure sequences with the highest likelihood and to quantify the overall risk by system reliability analysis based on the identified sequences. One of the most widely used approaches is the so-called “bran...

Risk Analysis of Fatigue-Induced Sequential Failures by Branch-and-Bound Method Employing System Reliability Bounds

This paper provides an overview of theories and applications of structural system reliability (SSR). The paper defines SSR problems and discusses the growing needs for SSR analysis and tech...

https://ascelibrary.org/doi/pdf/10.1061/AJRUA6.0001122

Structural System Reliability: Overview of Theories and Applications to Optimization

http://civil.iisc.ernet.in/~manohar/sayan_jsv_rel.pdf

Reliability Analysis Of Randomly Vibrating Structures With Parameter Uncertainties

Automatic generation of stochastically dominant failure modes of frame structures

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Automatic generation of stochastically dominant failure modes of frame structures