With specific reference to the seismic reliability of existing bridges and highway networks, the design of preventive upgrading interventions is discussed. First, the results are presented of a numerical analysis of the seismic response of multispan r.c. girder bridges, aimed at evaluating the efficiency of different upgrading techniques. Next, a procedure is illustrated for assigning priorities among the bridges included in a highway network, allocating the available resources in such a way that some appropriate objective function is maximized. Three possible objective functions are considered, namely the probability of maintaining a connection between a source and a destination node (reliability of the network), the ratio between the increase of reliability and the time employed (time-efficiency of the interventions) and the out-of-service time of the network in case of a severe earthquake.
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|Titolo:||Preventive measures for reducing the seismic risk of bridges|
|Data di pubblicazione:||1995|
|Appartiene alla tipologia:||04b Atto di convegno in volume|