In recent days, many damages have been detected in superannuated bridges. Especially, the fatigue problems become serious in the maintenance of the bridges. It is important to investigate the load bearing capacity of the girder ends ability when some crack damages have occurred in the steel bridge. In this study, typical crack damages have dealt with analytically; one is the crack which occurred in the vicinity of the welding of the sole plate, the other is the crack which occurred in the vicinity of the gusset section of the web. Based on the analytical results, the relation between the load carrying capacity at the girder end and the crack length/direction is discussed. The crack occurred in the part which a tension field forms with cracks of steel girder on which shearing force acts in analysis in case a crack occurs, it turned out that reduction of ultimate shear strength is large.

• 김인호(한국시설안전공단, 특수교유지관리센터, 직원) | Kim, In-Ho
• 임윤식(한국시설안전공단, 특수교유지관리센터, 직원) | Lim, Yoon-Sik
• 주형석(한국시설안전공단, 특수교유지관리센터, 차장) | Ju, Hyeong-Seok
• 이상철(한국시설안전공단, 특수교유지관리센터, 소장) | Lee, Sang-Cheal