LOCAL STRESSES AT THE INTERSECTION OF CROSS-BEAM FLANGE WITH BOX-GIRDER WEB

Local stresses al the intersection of a top flange of a cross beam wit h a box-girder web are investigated analytically and experimentally. F inite element analyses of a T-shaped welded joint and a loading test o f a cantilever beam of acrylic material reveal that a local stress whi ch is different from the one caused by the stress concentration at a w eld toe is developed at the intersection. Finite element analyses of a n I-section beam show that the restraint of the vertical deformation o f the cross beam at the box-girder web induces the local stress. It is pointed out that the local stress must be considered in fatigue desig n. A method of determining the local stress is proposed.