APPLICATION OF CABLE-TYPE COLLAPSE PREVENTION DEVICE TO OVERALL FAILURE OF UPPER-DECK TYPE TRUSS BRIDGES

Abstract

 Cable-type seismic bridge restrainers are widely used to prevent unseating of superstructures during earthquakes. However, these bridge restrainers cannot be applied to the case when failure occurs in the entire superstructures. Therefore, a self-anchored cable-type collapse prevention device was newly proposed to prevent the entire collapse of bridge systems. This device makes use of the catenary action of the cables to support the overall length of the failed super-structures. Herein, the applicability of the cabletype collapse prevention device to an upper deck-type single span truss bridge was examined experimentally and numerically, assuming that seriously corroded lower chord members suddenly fail.