In order to reduce the risk of disruption by an earthquake, preventive interventions on existing facilities are necessary, but often hindered by the limitation of the available economic resources: therefore, the optimal allocation of resources is a key point for the effectiveness of any risk-reduction programme. A procedure has thus been developed for the optimal allocation of limited resources in preventive interventions aimed at increasing the seismic reliability of highway networks with respect to several alternative objectives (connectivity of the network, traffic capacity, etc.). The procedure has been extended in order to take account of several possible objectives in a multi-objective optimization procedure. In this paper, an example of optimal allocation in a specific network is developed in detail to explain and illustrate the procedures. The vulnerable elements of the network are identified with reinforced concrete bridges. The fragilities (i.e. the probabilities of failure vs. the earthquake intensity) of the bridges, either in the original or the upgraded conditions, are assumed to be known. The results of the optimizations are compared and discussed in a multi-objective optimization framework.

Multi-Objective Optimal Allocation of Resources for Preventive Interventions on Bridges / Augusti, Giuliano; Ciampoli, Marcello; F., Purchiaroni. - STAMPA. - (1997), pp. 33-49.

Multi-Objective Optimal Allocation of Resources for Preventive Interventions on Bridges

AUGUSTI, Giuliano;CIAMPOLI, Marcello;
1997

Abstract

In order to reduce the risk of disruption by an earthquake, preventive interventions on existing facilities are necessary, but often hindered by the limitation of the available economic resources: therefore, the optimal allocation of resources is a key point for the effectiveness of any risk-reduction programme. A procedure has thus been developed for the optimal allocation of limited resources in preventive interventions aimed at increasing the seismic reliability of highway networks with respect to several alternative objectives (connectivity of the network, traffic capacity, etc.). The procedure has been extended in order to take account of several possible objectives in a multi-objective optimization procedure. In this paper, an example of optimal allocation in a specific network is developed in detail to explain and illustrate the procedures. The vulnerable elements of the network are identified with reinforced concrete bridges. The fragilities (i.e. the probabilities of failure vs. the earthquake intensity) of the bridges, either in the original or the upgraded conditions, are assumed to be known. The results of the optimizations are compared and discussed in a multi-objective optimization framework.
1997
Optimal Performance of Civil Infrastructure Systems
9780784403150
Civil engineering; reliability (engineering); public works; maintenance and repair; structural optimization; life cycle costing
02 Pubblicazione su volume::02a Capitolo, Articolo o Contributo
Multi-Objective Optimal Allocation of Resources for Preventive Interventions on Bridges / Augusti, Giuliano; Ciampoli, Marcello; F., Purchiaroni. - STAMPA. - (1997), pp. 33-49.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/147822
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