ABSTRACT
Deteriorating structures and civil infrastructure are continuously subjected to external loads, mechanical stressors, environmental stressors, and extreme events throughout their service life. These factors, which are highly uncertain, complicate accurate assessment and prediction of structural performance and remaining service life. To address these challenges, timely inspection and monitoring are essential. However, inspection and monitoring alone cannot extend service life or improve performance. Thus, integrating inspection, monitoring, and maintenance management is crucial for the effective life-cycle management of deteriorating structures. This paper focuses on optimizing life-cycle inspection, monitoring, and maintenance planning, based on multiple objectives. These objectives include: (a) performance-based, (b) cost-based, (c) damage detection-based, (d) service life-based, and (e) risk-based objectives. The formulations of these objectives and approaches for multi-objective optimization (MOO) of inspection, monitoring, and maintenance management are presented. The decision-making process to select the best management strategy is provided. Furthermore, the updating process based on information from inspection and monitoring is addressed to enhance the accuracy of life-cycle inspection, monitoring, and maintenance planning. Finally, MOO for life-cycle management at the network level is described, including the associated objectives and prospects for improving computational efficiency.
