Naslov
Reliability-based design optimization of laterally loaded monopile foundations for offshore wind turbines

Autori
Đepina, Ivan ; Eiksund, Gudmund

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Frontiers in Offshore Geotechnics III : Proceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics (ISFOG 2015) / - Leiden : Taylor & Francis, 2015, 1355-1360

ISBN
978-1-138-02848-7

Skup
3rd International Symposium on Frontiers in Offshore Geotechnics (ISFOG 2015)

Mjesto i datum
Oslo, Norveška, 10.06.2015. - 12.06.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
reliability analysis ; reliability ; time-dependent reliability

Sažetak
The aim of reliability-based design optimization in this study is to minimize the production, installation and failure cost of a monopile foundation with respect to reliability constraint. Design cost is expressed as a function of deterministic design variables (i.e., monopile diameter, wall thickness and embedded length) and uncertain parameters (i.e., lateral load, undrained shear strength). The reliability constraint is defined by limiting the probability of exceeding the ultimate limit state with respect to uncertain parameters to P(lim F)=10(−4). Optimization is conducted by coupling the Simulated Annealing stochastic optimization with the Subset Simulation reliability algorithm. This study adapts the Simulated Annealing algorithm to search for minimum under reliability constraint by modifying the acceptance probability. Probabilistic response of the monopole foundation is obtained by coupling the deterministic p-y beam spring finite element model with random load and random field model of undrained shear strength variability.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA