A Study on the Numerical Analysis of Welding Heat Distribution of Preflex Beam

J. Ocean Eng. Technol. 2004;18(2):52-57.

유한요소법에 의한 PREFLEX BEAM의 용접열분포 특성에 관한 연구

방한서,주성민,김하식

조선대학교 항공ㆍ조선공학부,조선대학교 선박해양공학과 대학,조선이공대학 컴퓨터응용기계학부

Keywords: Preflex Beam, Finite Element Analysis, Welding Residual Stress

핵심용어: 프리플렉스보, 유한요소해석, 용접잔류응력

Abstract

Preflex beam is a method of construction designed to hold the pre-compressive stresses over the concrete pier by the preflexion load. During the fabrication of the girder, welding causes residual stresses. The welding residual stresses must be relieved in order to generate the accurate compressive pre-stresses. In this study, to determine the thermal distribution characteristics on the girder by welding, both three-dimensional finite element analysis and two-dimensional finite element analysis, in a quasi-steady state, is carried out. After comparing each result between the three-dimensional analysis and the two-dimensional analysis, finite element analysis is carried out against the actual girder, and the welding thermal distribution characteristic over the preflex beam is analyzed. It is possible to provide the input data for the analysis of the welding residual stresses.