Nonlinear imperfect analysis of corrugated web beams subjected to lateral-torsional buckling

Abstract In this paper the lateral-torsional buckling (LTB) behavior of steel trapezoidally corrugated web girders is studied by advanced nonlinear finite element (FE) analysis in order to develop new computer-based design method for the determination of the LTB strength of such innovative members subjected to pure bending. Due to the low number of previous investigations the rules of FE modelling for strength determination is not unified nor regulated in the case of corrugated web girders. In addition, standards and specifications do not provide any prescriptions on how to determine the LTB strength of corrugated web girders. The required imperfections have key role in the LTB strength determination. The paper discusses the FE modelling issues on the basis of own test results. Advanced FE model is developed, mathematically verified, and validated by experimental test results. Standards provide equivalent geometric imperfections for conventional flat web I-girders. These proposals have not been, however, investigated for the application to corrugated web girders. Thus in this paper a detailed imperfection sensitivity studies are performed and finally modelling prescriptions and required imperfections – including residual stresses and initial geometric imperfections – are developed and proposed to promote a novel FE analysis based design method for these innovative structures.

[1]  Mostafa Fahmi Hassanein,et al.  Lateral-torsional buckling strength and behaviour of high-strength steel corrugated web girders for bridge construction , 2018 .

[2]  Ezzeldin Y. Sayed-Ahmed,et al.  Lateral torsion-flexure buckling of corrugated web steel girders , 2005 .

[3]  Balázs Kövesdi,et al.  Flange buckling behavior of girders with corrugated web Part II: Numerical study and design method development , 2017 .

[4]  P. Real,et al.  Elastic critical moment of beams with sinusoidally corrugated webs , 2017 .

[5]  Zhe Zhang,et al.  Cantilever welded wide-flange beams with sinusoidal corrugations in webs: Full-scale tests and design implications , 2017 .

[6]  Hamid reza Kazemi nia korrani,et al.  Lateral bracing of I-girder with corrugated webs under uniform bending , 2010 .

[7]  Jiho Moon,et al.  Lateral–torsional buckling of I-girder with corrugated webs under uniform bending , 2009 .

[8]  Sung Nam Kim,et al.  Elastic lateral-torsional buckling strength of I-girder with trapezoidal web corrugations using a new warping constant under uniform moment , 2010 .

[9]  László Dunai,et al.  Finite element modelling and analysis of bolted joints of 3D tubular structures , 2004 .

[10]  Zhe Zhang,et al.  Flexural-Torsional Buckling of H-Beams with Corrugated Webs , 2010 .

[11]  Nam-Hyoung Lim,et al.  Moment gradient correction factor and inelastic flexural–torsional buckling of I-girder with corrugated steel webs , 2013 .

[12]  S. Timoshenko.  Theory of Elastic Stability , 1936 .

[13]  Sherif A. Ibrahim,et al.  Lateral torsional buckling strength of unsymmetrical plate girders with corrugated webs , 2014 .

[14]  Roberval José Pimenta,et al.  Reliability-based design recommendations for sinusoidal-web beams subjected to lateral-torsional buckling , 2015 .

[16]  Youngjong Kang,et al.  Moment modification factor of I-girder with trapezoidal-web-corrugations considering concentrated load height effects , 2011 .

[17]  Tao Zhang,et al.  Experimental and numerical study of residual stress distribution of corrugated web I-beams , 2020 .

[18]  Vladimír Ilanovský,et al.  Assessment of bending moment resistance of girders with corrugated web , 2015 .

[19]  Sung Nam Kim,et al.  Moment modification factors of I-girder with trapezoidal web corrugations under moment gradient , 2012 .

[20]  Mostafa Fahmi Hassanein,et al.  Lateral-Torsional buckling behaviour of mono-symmetric S460 corrugated web bridge girders , 2020 .

[21]  Balázs Kövesdi,et al.  Flange buckling behavior of girders with corrugated web Part I: Experimental study , 2017 .

[22]  Mostafa Fahmi Hassanein,et al.  Behavior of bridge girders with corrugated webs: (II) Shear strength and design , 2013 .

[23]  B. Kövesdi,et al.  Welding simulation of corrugated web girders - Part 1: Effect of manufacturing on residual stresses and imperfections , 2020 .

[24]  Balázs Kövesdi,et al.  Determination of the patch loading resistance of girders with corrugated webs using nonlinear finite element analysis , 2011 .

[25]  Mostafa Fahmi Hassanein,et al.  Assessment of the suitability of eurocode design model for corrugated web girders with slender flanges , 2020 .

[26]  M. Hassanein,et al.  Strength and behaviour of laterally-unrestrained S690 high-strength steel hybrid girders with corrugated webs , 2020 .

[27]  Koichi Watanabe,et al.  LATERAL-TORSTIONAL BUCKLING CAPACITY OF STEEL GIRDERS WITH CORRUGATED WEB PLATES , 2007 .