A co-ordinated research effort has been initiated by the Authors with the aim of developing life-cycle reliability-based methodologies for the management and retrofitting of deteriorating structures and lifelines. As a first step, network systems with vulnerable nodes are considered: specifically, the object of the present paper is the optimal planning of retrofitting interventions on bridges included in a road network, taking into account their deterioration and the limitation of available economic resources. The procedure is illustrated with reference to a 10-node network. It is assumed that the resources available for retrofitting are not sufficient to guarantee the required structural reliability for all bridges throughout the design lifetime: thence the set of ret-rofitting interventions is sought that maximizes the network reliability (defined as the probability of maintaining at least a connection between an origin and a destination node) under a constraint on the total expenditure. The allocation is performed by means of a dynamic programming procedure, because exhaustive search would require an unacceptable computer time.
Life-cycle reliability-based system management of structures and networks / Augusti, Giuliano; Ciampoli, Marcello; D. M., Frangopol. - STAMPA. - 1:(1997), pp. 459-466. (Intervento presentato al convegno 7th International conference on structural safety and reliability tenutosi a Kyoto, Japan nel 24-28 November 1997).
Life-cycle reliability-based system management of structures and networks
AUGUSTI, Giuliano;CIAMPOLI, Marcello;
1997
Abstract
A co-ordinated research effort has been initiated by the Authors with the aim of developing life-cycle reliability-based methodologies for the management and retrofitting of deteriorating structures and lifelines. As a first step, network systems with vulnerable nodes are considered: specifically, the object of the present paper is the optimal planning of retrofitting interventions on bridges included in a road network, taking into account their deterioration and the limitation of available economic resources. The procedure is illustrated with reference to a 10-node network. It is assumed that the resources available for retrofitting are not sufficient to guarantee the required structural reliability for all bridges throughout the design lifetime: thence the set of ret-rofitting interventions is sought that maximizes the network reliability (defined as the probability of maintaining at least a connection between an origin and a destination node) under a constraint on the total expenditure. The allocation is performed by means of a dynamic programming procedure, because exhaustive search would require an unacceptable computer time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
