AN ANALYTICAL STUDY OF AN FRP DECK ON A TRUSS BRIDGE

Abstract eng:
Many of the old truss bridges in the New York State are posted due to superstructure deterioration and an increase in live load. By replacing the heavy decks of these bridges with lighter ones, the load-carrying capacities of these bridges can be improved, avoiding the need for replacement or costly repairs. Two years ago, a lighter FRP deck was used on an experimental basis to replace a concrete bridge deck on a deteriorated truss bridge in New York to improve its service life. Load-tests, conducted to evaluate the deck performance under service loads, indicated that the methods used for the design of the new fiber reinforced polymer (FRP) decks were very conservative. Thus validated finite-element models were developed to improve on these designs and predict the failure modes of this bridge when subjected to overload and thermal effects. This presentation summarizes the results of load tests and analytical studies.

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