Measurement of impact coefficient and stress redistribution due to fracture of members of the existing steel truss bridge

Abstract

In this study, to show the impact coefficient and stress redistribution of steel truss bridges when truss members of the bridges fracture, a field test used existing steel truss bridge was conducted. To measure the dynamic force responses of the members in the fracture test, the dynamic strains of the members were measured by dynamic data loggers. The truss members which were a middle vertical member and a neighbor vertical member of the bridge were cut off by gas cutter. The result of the field test showed the actual value of impact coefficient and stress redistribution due to fracture of the truss members.