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Effect of Fillet Welds on Initial Rotational Stiffness of Welded Tubular Joints

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Original languageEnglish
Pages (from-to)1643-1650
Number of pages8
JournalProcedia Engineering
Publication statusPublished - 2016
Publication typeA1 Journal article-refereed
Event15th International scientific conference “Underground Urbanisation as a Prerequisite for Sustainable Development - St. Petersburg, Russian Federation
Duration: 12 Sep 201615 Sep 2016


Welded tubular joints are widely used in optimization of tubular structures. The most important parameter in optimization of these joints is their initial rotational stiffness. For today there is no any available analytical method that allows calculating rotational stiffness for joints with an angle different from 90 degrees. Conducting computationally intensive finite element analyses (FEA) usually renders the optimization procedure inapplicable. Constructing an approximate surrogate model of the joint responses can lead to a significant reduction of computational efforts. However most of surrogate models are constructed for joints with only butt welds. This article proposes a simple method for implementing fillet welds in surrogate modeling of tubular joints. Using this method the effect of fillet welds on initial rotational stiffness of joints is analyzed.

ASJC Scopus subject areas


  • Bending moments, Finite element method, In plane bending, joints, Square hollow sections, Steel structures, Stiffness, Structural design

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Field of science, Statistics Finland

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