A Study on the Fatigue Life of Large-Scale Tubular K-joints

J. Ocean Eng. Technol. 2008;22(2):58-64.

Im Sung-Woo,Chang In-Hwa

Research Industrial Science and Technology,Research Industrial Science and Technology

대형 Tubular K-Joint의 피로수명에 관한 연구

임성우,장인화

포항산업과학연구원,포항산업과학연구원

Keywords: Fatigue life, Weld improvement, Toe grinding, Weld profiling, Chord wall thickness, API 2W Gr.50&60 steel plate API 2W Gr.50&60

핵심용어: 피로수명, 용접부 개선, 토어 그라인딩, 웰드 프로파일링, 코드 두께, 후판

Abstract

Large-scale tests of welded tubular K-joint sunder balanced in-plane bending braces were carried out to observe the fatigue behavior of the API 2W Gr.60 steel plate produced by POSCO. Toe grinding and weld profiling were used to improve the fatigue life of a tubular K-joint. The effects of the steel grade and chord wall thickness on the fatigue life were also investigated. The present results were compared with the UK DEn design curve.