Numerical analysis of heat-curved I-girders. Issue 4 (30th March 2017)

• Record Type: Journal Article
• Authors: Gergess, Antoine; Sen, Rajan
• Is Part Of: Journal of computational design and engineering. Volume 4:Issue 4(2017)
• Page Start: 263
• Page End: 273
• Publication Date: 2017-03-30
• Subjects: Contour plots -- Duhamel analogy -- Heat-curving -- Non-linear -- Numerical analysis -- Strainl -- Stress -- Temperature; Engineering -- Data processing -- Periodicals; Computer-aided design -- Periodicals; Computer-aided design; Engineering -- Data processing; Electronic journals; Electronic journals; Periodicals; 620.0042
• DOI: 10.1016/j.jcde.2017.03.002
• Languages: English
• ISSNs: 2288-4300

Abstract

Graphical abstract: Abstract: Heat curving is a practical and economical process used by steel fabricators for curving structural steel. In this method, the flange edges of a fabricated straight girder are asymmetrically heated to induce residual curvature on cooling. Available analytical methods for predicting the resulting residual stress, strain and curvature are complex and iterative because of the need to account for material and geometric non-linearity. This paper presents a single-step, non-iterative, numerical procedure for determining the effects of heat-curving on residual stress and strain based on a previously developed simplified analysis. Thermal equilibrium equations for idealized heating profiles are first recast in a general parametric form and then solved numerically for standard heating width and temperature using modern technical computing. The resulting solutions are expressed as polynomial functions to allow the solution space for the residual curvature to be graphically represented. Curvature predictions using this simplified approach are shown to be within 11% of measured values and within 5% of values obtained using more rigorous numerical methods.