Abstract
In case of field welding for I-section girders, cope hole details are applied at web plate. Local stress concentration is caused by shear deformation due to the existence of cope hole. This kind of joints has low fatigue strength. FATIGUE DESIGN RECOMMENDATIONS of JSSC regulates this details as class G. In this study, fatigue strength of cope hole details with thick flange plates was examined for the model of fewer main girders brige with cope hole, especially taking the influence of shear into account. Besides, in order to improve fatigue strength, the effect of grinder finishing of boxing weld was investigated. Based on the results of theses investigations, some conclusions were obtained for design and fabrication of structure details to apply to field welding to I-section girders with cope holes.
