Abstract
More than 50 years have passed since Japan's infrastructure construction era peaked in the 1960's, and a lot of steel bridges have now aged to the point where we need to conduct structural analyses to determine their current residual strength and to develop measures to facilitate future use. Repair, reinforcement and performance recovery are of special concern in environments with high levels of airborne sea-salt, and therefore attention is being directed towards the study of effective countermeasures under such conditions. In this paper we clarify the actual corrosion condition of the original Amarube bridge and present a method to numerically simulate the transport of sea-salt particles that reflects actual geographic and weather conditions in an effort to further knowledge concerning steel bridges in a corrosive environment. We thereby demonstrate the applicability of the simulation model through a comparative study of simulation results and measured values for the original Amarube trestle bridge which was in service for 98 years from 1912 to 2010.
