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According to Eurocode EN 1990 and Lithuanian Technical Regulation of Construction STR 2.05.03:2003, structures should be designed to satisfy reliability requirements. The reliability of a structure can be achieved using one of 3 methods: partial factor (PF), PF assisted by testing and direct probability-based method. When PF methods are used, the determined reliability of a structure is often greater than required; therefore the direct probability methods allow a more cost-efficient design. The reviewed literature suggests that even greater economical effect can be achieved by combining probability-based design methods with optimization. Unfortunately, the literature presents very few such methodologies. This article focuses on an optimal design of a truss under variable repeated loading at shakedown. The authors propose a model of a truss volume minimization problem with direct probabilistic evaluation of safety margin. The developed technique allows finding minimum volume of desirable reliabili...

PROBABILITY-BASED DESIGN OF AN OPTIMAL ELASTIC–PLASTIC TRUSS / OPTIMALIOS TAMPRIAI PLASTINĖS SANTVAROS PROJEKTAVIMAS TIKIMYBINIU STATISTINIU METODU