Fatigue Strength of Out-of-Plane Gusset Welded Joints Repaired by Bolting - Stop- Hole-Method using Bearing Type of High Strength Bolt

Abstract

Bolting-Stop-Hole method is one of useful countermeasures against fatigue cracks originating in steel members. If bearing type of high strength bolts are applied instead of usual high strength bolt, stress transmission in the hole can be expected by stress transfer through bolt itself in addition to friction between the base plate and bolt head (nut). This study aims at making clear the fatigue strength of fatigue cracked out-of-plane gusset welded joints repaired by the bolting-stop-hole method using bearing type of high strength bolt. For this purpose, fatigue tests and stress-measuring tests on model specimens have been performed in consideration of plate thickness.