FATIGUE VERIFICATION AND ITS CONSIDERATIONS FOR THE STUD IN SIMPLE COMPOSITE GIRDER BRIDGE DAMAGED BY FIRE

Abstract

  When composite girder bridges are exposed to fire due to the traffic accident, doubt fire and so on, it is important to verify the damage of shear connections as well as the steel girder and RC slab. However, damages of the shear connection cannot be confirmed easily. Therefore, the authors carried out the static and fatigue push-out tests for headed studs which were naturally cooled after heating. From the test result, it was found that the fatigue strength of studs heated up to 700°C shows remarkable decrease. Based on the test data, the results of the fatigue verification under various conditions for studs damaged by fire and its considerations are reported in this paper.