\r\nweb girders, its application field is growing for bridges as well as for

\r\nbuildings. The global stability behavior of such girders is

\r\nsignificantly larger than those of conventional I-girders with flat web,

\r\nthus the application of the structural steel material can be

\r\nsignificantly reduced. Design codes and specifications do not provide

\r\nclear and complete rules or recommendations for the determination of

\r\nthe lateral torsional buckling (LTB) resistance of corrugated web

\r\ngirders. Therefore, the authors made a thorough investigation

\r\nregarding the LTB resistance of the corrugated web girders. Finite

\r\nelement (FE) simulations have been performed to develop new

\r\ndesign formulas for the determination of the LTB resistance of

\r\ntrapezoidally corrugated web girders. FE model is developed

\r\nconsidering geometrical and material nonlinear analysis using

\r\nequivalent geometric imperfections (GMNI analysis). The equivalent

\r\ngeometric imperfections involve the initial geometric imperfections

\r\nand residual stresses coming from rolling, welding and flame cutting.

\r\nImperfection sensitivity analysis was performed to determine the

\r\nnecessary magnitudes regarding only the first eigenmodes shape

\r\nimperfections. By the help of the validated FE model, an extended

\r\nparametric study is carried out to investigate the LTB resistance for

\r\ndifferent trapezoidal corrugation profiles. First, the critical moment of

\r\na specific girder was calculated by FE model. The critical moments

\r\nfrom the FE calculations are compared to the previous analytical

\r\ncalculation proposals. Then, nonlinear analysis was carried out to

\r\ndetermine the ultimate resistance. Due to the numerical

\r\ninvestigations, new proposals are developed for the determination of

\r\nthe LTB resistance of trapezoidally corrugated web girders through a

\r\nmodification factor on the design method related to the conventional

\r\nflat web girders.","references":"[1] A. R\u00e1cz K\u00e4fern\u00e9, \u201eLateral-torsional buckling resistance of trapezoidally\r\ncorrugated web girders\u201d (in Hungarian) Master\u2019s thesis, 2017.\r\n[2] J. Lindner, \u201eLateral torsional buckling of beams with trapezoidally\r\ncorrugated webs\u201d, Proceedings, 4th International Colloquium on\r\nStability of Steel Structures, Budapest, 1990, pp. 79-82.\r\n[3] E. Y. Sayed-Ahmed, \u201eLateral torsion-flexure buckling of corrugated\r\nweb steel girders\u201d, Proceedings of the Institution of Civil Engineers,\r\nStructures and Buildings, Vol. 158, No. 1, 2005, pp. 53-69.\r\n[4] J. Moon, J. Yi, B. H. Choi, H-E. Lee, \u201eLateral-torsional buckling of Igirder\r\nwith corrugated webs under uniform bending\u201d, Thin-walled\r\nStructures, Vol. 47, 2008, pp. 21-30.\r\n[5] R. P. Johnson, J. Cafolla, \u201eCorrugated webs in plate girders for bridges\u201d,\r\nStructures and Buildings, ICE, Vol. 123, 1997, pp. 157-164.\r\n[6] N. D. Nguyen, S. N. Kim, S-R. Han, Y-j. Kang., \u201eElastic lateraltorsional\r\nbuckling strength of I girder with trapezoidal web corrugations\r\nusing a new warping constant under uniform moment\u201d, Engineering\r\nStructures, Vol. 32, 2010, pp. 2157-2165.\r\n[7] Z. Zhang, G. Li, F. Sun, \u201eFlexural-torsional buckling of H-beams with\r\ncorrugated webs\u201d, Advanced Materials Research, 163-167, 2011, pp.\r\n351\u2013357.\r\n[8] M. Larsson, J. Persson, \u201eLateral-torsional buckling of steel girders with\r\ntrapezoidally corrugated webs\u201d Master\u2019s thesis 2013:57.\r\n[9] V. Ilanovsky, \u201eAssessment of bending moment resistance of girders with\r\ncorrugated web\u201d Pollack Periodica, Vol. 10, No. 2, 2015, pp. 35-44.\r\n[10] ANSYS\u00ae v17.2, Canonsburg, Pennsylvania, USA.\r\n[11] EN 1993-1-1: 2009, EUROCODE 3, Design of steel structures, part 1-1:\r\nGeneral rules and rules for buildings.\r\n[12] M. Kubo, K. Watanabe, \u201eLateral-torsional buckling capacity of steel\r\ngirders with corrugated web\u201d Doboku Gakkai Ronbunshuu A, Vol. 63,\r\nNo.1., 2007, pp. 179-193.\r\n[13] B. J\u00e1ger, L. Dunai, B. K\u00f6vesdi, \u201cFlange buckling behavior of girders\r\nwith corrugated web Part II: Numerical study and design method\r\ndevelopment\u201d, Thin-Walled Structures, Vol. 118, 2017, pp. 238-252.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 136, 2018"}