A Study on Improvement of fatigue Details in Orthotropic Steel Deck Bridge with Bulkhead Plate

J. Ocean Eng. Technol. 2004;18(1):22-27.

벌크헤드 플레이트가 부착된 강바닥판교의 피로상세 개선 연구

공병승

동서대학교 건설공학부 토목공학과

Keywords: Orthotropic Steel Deck Bridge, Fatigue Test, Fatigue Crack, Bulkhead Plate, Secondary Stress, Out-of-Plane Deformation

핵심용어: 강바닥판교, 피로실험, 피로균열, 벌크헤드 플레이트, 2차응력, 면외변형

Abstract

An orthotropic steel deck system is widely adapted form for a long-span bridge. It has many advantages, such as the big reduction of dead weight, the simplicity for erection, and the reduction of the construction period. However, an orthotropic steel deck system requires a lot of welding work, which may result in defects and deformation of connection. Therefore, the research for the general behavior and fatigue strength of the several details in orthotropic steel deck bridge is necessary. The fatigue failure with distortion results from secondary stress by out-of-plane deformation; these kinds of cracks are very difficult to measure, and can not be precisely calculated through finite element analysis. This stress concentration phenomenon generates the fatigue failure around the lower scallop of the transverse rib. This paper presents improved details of the intersection between the longitudinal rib and the transverse rib of an orthotropic steel deck bridge by the third dimensional hit size test, and the finite element method, which can minimize local stress through parametric study.