Seismic Study of the Urban Bridges of the City of Ensenada, Baja California, Mexico

Abstract eng:
The coastal city of Ensenada Mexico (300 km south of Los Angeles, California), lies in an area close to the San Andres fault system, hence, seismic risk studies aimed to prevent the disaster that an eventual fail of the infrastructure (particularly the 29 city’s urban bridges) might cause, are required. The objective of this research is to characterize those bridges in a Geographic Information System (GIS) according to their vulnerability. To achieve this goal, the study has been integrated in three stages: microtremors’ measurement, to determine the bridge’s fundamental periods; seismic vulnerability computation with Maldonado method (fuzzy sets) and correlation with the structural models of finite-element of some bridges; and the GIS construction. With this information, a GIS showing the seismic vulnerability for each bridge is available to be harness by the local emergency management agency.

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