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Response surface method strategies coupled with NLFEA for structural reliability analysis of prestressed bridges

 Response surface method strategies coupled with NLFEA for structural reliability analysis of prestressed bridges
Autor(en): , , , ,
Beitrag für IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021, veröffentlicht in , S. 1813-1822
DOI: 10.2749/ghent.2021.1813
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The Response Surface Method (RSM) has become an essential tool to solve structural reliability problems due to its accuracy, efficacy, and facility for coupling with Nonlinear Finite Element Analys...
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Bibliografische Angaben

Autor(en): (Luleå University of Technology, Luleå, Sweden)
(Luleå University of Technology, Luleå, Sweden)
(SINTEF Narvik AS, Rombaksveien E6-47, N-8517 Narvik, Norway Luleå University of Technology, Luleå, Sweden‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌)
(University of Campinas, Campinas, Brazil)
(University of Campinas, Campinas, Brazil)
(University of Campinas, Campinas, Brazil)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021
Veröffentlicht in:
Seite(n): 1813-1822 Anzahl der Seiten (im PDF): 10
Seite(n): 1813-1822
Anzahl der Seiten (im PDF): 10
DOI: 10.2749/ghent.2021.1813
Abstrakt:

The Response Surface Method (RSM) has become an essential tool to solve structural reliability problems due to its accuracy, efficacy, and facility for coupling with Nonlinear Finite Element Analysis (NLFEA). In this paper, some strategies to improve the RSM efficacy without compromising its accuracy are tested. Initially, each strategy is implemented to assess the safety level of a highly nonlinear explicit limit state function. The strategy with the best results is then identified and used to carry out a reliability analysis of a prestressed concrete bridge, considering the nonlinear material behavior through NLFEA simulation. The calculated value of 𝛽 is compared with the target value established in Eurocode for ULS. The results showed how RSM can be a practical methodology and how the improvements presented can reduce the computational cost of a traditional RSM giving a good alternative to simulation methods such as Monte Carlo.

Stichwörter:
Brücke Tragwerkszuverlässigkeit nichtlineare Analyse
Copyright: © 2021 International Association for Bridge and Structural Engineering (IABSE)
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