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A platform for research: civil engineering, architecture and urbanism
Reliability-Based Optimal Planning of Maintenance and Inspection
Major deterioration mechanisms for infra-structural systems such as bridges, tunnels and dams are chloride initiated corrosion of reinforced concrete and fatigue damage in steel structures. Corrosion of the reinforcement is a significant problem for a large number of reinforced concrete structures since it can result in very expensive maintenance and repair actions. Further a substantial decrease of the load-bearing capacity may occur leading to an unacceptable level of safety for the structure. One mode of corrosion initiation is that the chloride content around the reinforcement exceeds a critical threshold value. In the present paper a statistical model is described by which the chloride content in a reinforced concrete structure can be predicted. The model is used in reliability-based inspection and maintenance planning for concrete structures. For steel structures a simplified and generic approach for risk-based inspection planning of fatigue sensitive structural details is described. Fatigue sensitive details are categorized according to their Fatigue Design Factor (FDF) and SN curve. Using a fracture mechanics model calibrated on a probabilistic basis to the appropriate SN-curve, cost-optimal inspection and repair planning can be performed. The procedure is illustrated by an example considering inspection planning of welded longitudinal stiffeners in steel bridges.
Reliability-Based Optimal Planning of Maintenance and Inspection
Major deterioration mechanisms for infra-structural systems such as bridges, tunnels and dams are chloride initiated corrosion of reinforced concrete and fatigue damage in steel structures. Corrosion of the reinforcement is a significant problem for a large number of reinforced concrete structures since it can result in very expensive maintenance and repair actions. Further a substantial decrease of the load-bearing capacity may occur leading to an unacceptable level of safety for the structure. One mode of corrosion initiation is that the chloride content around the reinforcement exceeds a critical threshold value. In the present paper a statistical model is described by which the chloride content in a reinforced concrete structure can be predicted. The model is used in reliability-based inspection and maintenance planning for concrete structures. For steel structures a simplified and generic approach for risk-based inspection planning of fatigue sensitive structural details is described. Fatigue sensitive details are categorized according to their Fatigue Design Factor (FDF) and SN curve. Using a fracture mechanics model calibrated on a probabilistic basis to the appropriate SN-curve, cost-optimal inspection and repair planning can be performed. The procedure is illustrated by an example considering inspection planning of welded longitudinal stiffeners in steel bridges.
Reliability-Based Optimal Planning of Maintenance and Inspection
So/rensen, John Dalsgaard (author) / Faber, Michael Havbro (author)
First US-Japan Workshop on Life-Cycle Cost Analysis and Design of Civil Infrastructure Systems ; 2000 ; Honolulu, Hawaii, United States
2001-06-22
Conference paper
Electronic Resource
English
Reliability-Based Optimal Planning of Maintenance and Inspection
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