Flexural-Torsional Buckling of H-Beams with Corrugated Webs

Abstract

To analyze the flexural and torsional buckling of H-beams with corrugated webs, the stress characteristics were compared with beams with plat webs firstly, then, the previous methods calculating warping constant of the H-beams with corrugated webs was discussed. Based on such works, a new calculation method was put forward. This method is simple in shape, by which the warping constant can be calculated easily. To test the accuracy of the method, plenty of numerical simulation models of beams under uniform bending was used to compare the difference between each method. The results proved that the method in this paper was successful and convenient.

Elastic Lateral‐Torsional Buckling of Girders with Corrugated Web: Equivalent Section Properties Approach

“…In addition to Lindner [38] and Moon et al [41] approaches, three more proposals have been presented in the literature and are used for comparison purposes in this paper. Zhang et al [42] follows the same premise of Lindner, that of only modifying the warping constant. They propose the following formula A totally different approach was made by Sayed-Ahmed [39].…”

Behavior of Steel Girderswith Corrugated Webswith Andwithout Openings

“…Zhang et al [3], presents a method for calculating the critical buckling moment in a way similar to that presented by Moon et al [2], Zhang et al, also rely on the assumptions first presented by lindner, stating that moment of inertia about the weak axis Iz and the torsion constant It of the girders with a corrugated web can be assumed to be equal to those of a girder with a flat web, and that the increased critical buckling moment is caused only by an increased warping constant Iw. The approach suggested by Zhang et al, for obtaining the warping constant of a girder with corrugated web is based on the expression for the warping constant of a prismatic girder with a flat, eccentric web.…”

“…(13) is integrated over one corrugation wave length, q and divided by this length as shown in Equ.(14). Ῑ w is the equivalent warping constant, suggested by Zhang et al [3], accounting for the effect of the corrugated web.…”

“…All examined methods are reasonably accurate for calculating the critical buckling moment. Also, it is hard to distinguish any differences but, by studying the exact values, it appears that Moon et al [2] and Zhang et al [3]. underestimate the critical buckling moment for girders with a small flange width.…”

“…[2] performed analytical models to investigate the lateral-torsional buckling strength of the I-girder with corrugated webs under uniform bending and also suggested an approximated method for estimating the warping constant C (w,co) by using a numerical method. Zhang et al [3] performed analytical models as Moon, etal. [2].…”