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Probabilistic Design of Offshore Structural Systems

by John Dalsgaard S?rensen, Univ of Aalborg, Denmark,



Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering

Abstract:

Probabilistic design of structural systems is considered in this paper. The reliability is estimated using first-order reliability methods (FORM). The design problem is formulated as the optimization problem to minimize a given cost function such that the reliability of the single elements satisfies given requirements or such that the systems reliability satisfies a given requirement. Based on a sensitivity analysis optimization procedures to solve the optimization problems are presented. Two of these procedures solve the system reliability-based optimization problem sequentially using quasi-analytical derivatives. Finally an example of probabilistic design of an offshore structure is considered.

Subject Headings: Offshore structures | Structural systems | System reliability | Structural reliability | Structural design | Sensitivity analysis | Probability

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