In the past two decades, many robust structural reliability methods have been presented that we may not even have heard their name. For a reliability researcher, it is very difficult to read all manuscripts, write their code and properly examine their efficiency/accuracy. On the other hand, it seems that some efficient/robust ones are being forgotten.
The purpose of this discussion is to create a space for the exchange of experience and expression of reliability researchers' views/opinions about the structural reliability methods. I hope this could help us to save time and learn more.
Suppose that you have a real-world structural reliability problem without any information about its limit state function, geometry of the performance function and the safety level of the problem (i.e. the performance function can be estimated by a finite element method-based software).
Among the existing reliability methods, which one is your choice? Why?
Let us discuss about this. Share your experiences to help others.
Dear Dr. Rashki,
Thank you so much for starting this interesting discussion. As you highlighted, there are many problems in civil engineering that they have no closed forms of Limit State Function (LSF) to express their behavior, and Finite Element (FE) analysis must be inevitably used to evaluate and investigate their performance. On the other hand, performing a reliability analysis based FE formulation along with Monte Carlo simulation (MCS) may require prohibitive computational effort. To overcome this problem, instead of using time-consuming FE formulation, actual LSF can be approximated and derived mathematically through many dedicated procedures that can be found in the literature. Among them, response surface method is more applicable and functional. In this method, a limited number of evaluations based rigorous FE formulation are required to approximate and build a mathematical form of limit state function that can hence be used to perform reliability analysis through available methods with less computational efforts.
Best regards
Mohammad
Dear Mohammad,
I really appreciate your effort to make the discussion interactive.
I provided a feedback but then, I remove it. First, let us know the opinion of other researchers about the drawbacks of using response surface method in reliability analysis of complex systems. Does anyone have experience in this regard? I accommodatingly present my experiences.
Dear Dr. Rashki,
I didn't see provided feedback after busy days! Anyway, many thanks for your time and consideration! Look forward to see new updates in this discussion!
Regards
Mohammad
Dear Mohammad,
we can wait for the next comment. Then, we will continue the discussion.
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