Premium
19.01: A study on the prediction of welding effects in steel box girders
Author(s) -
Krausche Thomas,
Launert Benjamin,
Pasternak Hartmut
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.500
Subject(s) - stiffening , girder , welding , structural engineering , context (archaeology) , computation , compression (physics) , computer simulation , roof , engineering , computer science , mechanical engineering , algorithm , materials science , geology , simulation , paleontology , composite material
For standard sections including I‐girders and rectangular box girders, several approaches on geometrical and structural imperfections are given in the literature, which can be implemented in a numerical analysis. For complex sections, as found in many of today's lightweight roof structures, these assumptions are conservative due to the sections typically unique shape, which leads to increased thicknesses or additional stiffening of the plates. This, on the other hand, can significantly affect fabrication costs. This paper aims to provide an overview on the possibilities in the numerical prediction of weld residual stresses and weld‐induced deformations for these sections. The obtained values can be used in a subsequent numerical analysis to understand the structural behavior and optimize the design. A representative example on a section used in a steel compression ring is described and analyzed using the numerical welding simulation. A simplification of the originally transient weld procedure is used in order to reduce computation times to a practically reasonable level. In this context, the Abaqus Welding Interface (AWI) helps to automate working steps in conjunction with the definition of weld passes and their sequencing, which shall be shown in here. The applicability of this method is discussed showing also a need of further investigations in this field. This is especially with regard to result quality, which requires some experimental back‐up. Nonetheless, this method could already help to show up tendencies or to identify potential critical spots in the design.