ABSTRACT
ABSTRACT: A consistent approach to the optimal design of durable structures must consider the time evolution of the structural performance induced by the progressive deterioration of the system properties. To comply with this requirement, a new conceptual approach to the minimum lifetime cost design of deteriorating structures under multiple loading conditions is presented. The proposed procedure is applied to the lifetime structural optimization of a steel truss and of a reinforced concrete frame under different damage and maintenance scenarios. The obtained results highlight the fundamental role played by both the time-variant performance and the maintenance planning in the selection of the optimum structural design.
