Reliability-Based Optimum Structural Design

Frangopol, Dan M.

doi:10.1007/978-1-4615-1771-9_16

Cited by 60 publications

(10 citation statements)

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“…There are multiple ways of formulating an RBDO problem (Enevoldsen and Sorensen 1994, Frangopol 1995, and Tu et al 1999. In its generic form, we seek the optimal vector of design variables…”

Section: Mathematical Formulation Of the Rbdo Problemmentioning

confidence: 99%

Integrated reliability and sizing optimization of a large composite structure

Eamon

Rais‐Rohani

2009

Marine Structures

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Eamon, C. D., and Rais-Rohani, M. (2009). "Integrated reliability and sizing optimization of a large composite structure." Marine Structures, 22(2), 315-334, doi: 10.1016/j.marstruc.2008.03 AbstractIn this paper, we present the application of probabilistic design modeling and reliability-based design optimization (RBDO) methodology to the sizing optimization of a composite advanced submarine sail structure under parametric uncertainty. With the help of probabilistic sensitivity analysis, the influence of individual random variables on each structural failure mode is examined, and the critical modes are treated as probabilistic design constraints under consistent lower bounds on the corresponding reliability indices. Whereas the failure modes are applied to structural components in the solution of the RBDO problem, the overall system reliability is also evaluated as a post-optimization step. The results indicate that in comparison to a deterministic optimum design, the structural mass of the probabilistic optimum design is slightly higher when consistent probabilistic constraints are imposed, and the overall structural stiffness is found to be more critical than individual component laminate ply thicknesses in meeting the specified design constraints. Moreover, the post-optimality analysis shows that the overall system failure probability of the probabilistic optimum design is more than 50% lower than that of the deterministic optimal design with less than 5% penalty in structural mass. ------------------------------

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Section: Mathematical Formulation Of the Rbdo Problemmentioning

confidence: 99%

Integrated reliability and sizing optimization of a large composite structure

Eamon

Rais‐Rohani

2009

Marine Structures

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“…Significant advances have been accomplished in the fields of modeling, analysis, maintenance, repair, and design of deteriorating civil engineering systems (Frangopol 1999, Enright & Frangopol 1998a, 1998b, Frangopol & Furuta 2001, Frangopol et al 2004a, 2004b, 2008, Ellingwood 2005, 2011, Estes & Frangopol 2001a, Nowak & Frangopol 2005, Cho et al 2007, Biondini & Frangopol 2008a, Biondini 2009, Chen et al 2010, Furuta et al 2010, Biondini & Frangopol 2011, Strauss et al 2013, Frangopol & Biondini 2013 and novel approaches to lifecycle reliability assessment, maintenance planning, and optimal design of structural systems have been proposed (Mori & Ellingwood 1994a, 1994b, Frangopol 1995, Frangopol et al 1997a, 1997b, 2002, Fu & Frangopol 1999a, 1999b, Frangopol & Das 1999, Furuta et al 2004, Ciampoli & Ellingwood 2002, Enright & Frangopol 1999a, 1999b, Estes & Frangopol 1999, Frangopol & Maute 2003, Kong & Frangopol 2003b, Biondini et al 2004, 2006a, 2006b, 2008, 2011, Fr...…”

Section: Introductionmentioning

confidence: 96%

Life-Cycle Performance of Structural Systems under Uncertainty

Biondini

Frangopol

2014

Structures Congress 2014

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The significant advances recently accomplished in the fields of modeling, analysis, and design of deteriorating civil engineering systems, are far from being explicitly addressed in design codes and effectively implemented into practice. There is, therefore, a strong need to promote further research in the field of life-cycle performance of structural systems under uncertainty and to fill the gap between theory and practice by incorporating life-cycle concepts in structural design codes and standards. An effort is currently ongoing within SEI/ASCE to meet this need. This paper is part of this effort and it is aimed at presenting a short overview of the main principles, concepts, methods and strategies associated with life-cycle assessment and design of deteriorating structural systems under uncertainty.

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“…The present paper uses performancebased design concepts and casts them into a multiple-objective optimization procedure. In many studies, mono-or multi-optimization tools have been applied to the structural design [Frangopol 1995;Breitung et al 1998;Thoft-Christensen and Sorensen 1987;Fu and Frangopol 1990]. In particular, the structural optimization procedure developed in ] has been here specialized into a specific procedure to retrofit an existing structure with a BRB system.…”

Section: Introductionmentioning

confidence: 99%