REPAIR FOR FATIGUE CRACKS AT CONNECTION BETWEEN MAIN GIRDER WEB AND LATERAL GIRDER FLANGE BY BOLTING STOP-HOLE METHOD WITH ATTACHED PLATES

Abstract

 For the purpose of clarifying the fatigue strength of a main girder web connected to a lateral girder flange which is repaired by bolting stop-hole method with attached steel plates, fatigue tests have been performed on girder specimens. In addition, fatigue tests have been also carried out on small specimens modeling the repaired parts in order to investigate the fatigue crack origins of the repaired parts. Furthermore, the effect of the repair method has been compared with those of stop-hole method and/or bolting stop-hole method though the fatigue tests. It has been confirmed that the fatigue strength of repairedparts is considerably high and almost equal to that of friction type of high strength bolted connections.