Structural Development of Tensile Type Bolted Connections for Temporary Emergency Bridge Focusing on Rapid Election

Recently in Japan some cases have been reported that the bridge washed away by tsunamis. For this reason, emergency temporary bridges are required for restoration after these disasters. Shortening the construction time of such bridges is a major issue. This study deals with the desirable structural details of the main girder end plate connections for an emergency temporary bridge by using FE analysis. Two concluding remarks were mainly revealed in this study. Firstly, the cope hole of the end plate at the intersection of the lower flange and the web plate reduces the bolt axial force increment near the intersection because this bolt became not to be subjected to the tensile force from the web. Secondary, the long tensile connection type is effective for reducing the axial force increment because the prying force isn’t occurred on the connection surface and the contact stress after tightening the bolts make the separation between end plates almost zero.