STUDY ON INDEX TO REOPEN FOR SERVICE OF STEEL RAILWAY BRIDGES SUBJECTED TO LOCAL DAMAGE DUE TO COLLISION OF VEHICLES PASSING THROUGH

Abstract

  On steel railway bridges crossing over roadways, collision accident occur frequently with large vehicles such as mobile crane and induce halting train service. When the accident occurs, the section men should judge immediately reopen service or continue halting after urgent inspection the damages. In case of serious damage such as girder deviation from shoes and rails bending horizontally, breaking of lower flange, continuous halting is judged until finish of repair works. But, in the case that the damage is only deformation of lower flange part such as local bending or sway deformation, the section men worry to judge reopen or halting because there is no clear basis for the decision. In this study, the boundary amounts of the local deformation damages are proposed through material tests for the damage part steel and numerical investigation of load carrying capacity of girders having such local deformation damage.