Author(s)

J. Medina, W. Lobo-Quintero

Abstract

This paper presents the fragility curves for a steel Pony Truss bridge with a 25 meter span, taking into account the following events: seismic actions, the real trucks that cross the bridge and the standard A.A.S.H.T.O. trucks. The purpose is to show the real vulnerability of a steel truss bridge. 1 Introduction Bridges are important structures for the community and everyone believes they must be completely safe. Since 1930, bridge analysis and design have undergone major changes and are a source of uncertainty. The changes within the new codes bring to light failures of these structures. Vulnerability studies are necessary to help discover what are the real conditions of a bridge. Vulnerability analysis or reliability analysis may be expressed by probabilities of failure that can be

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