An efficient modified flanges only method for plate girder bending resistance calculation
Lee, Chi King
Chiew, Sing Ping
Date of Issue2013
School of Civil and Environmental Engineering
The very popular “Flange Only” method suggested in the BS 5950 for calculation of bending resistance of plate girder with Class 4 slender web is studied and compared with the more complicated effective width method adopted by the EC3. It is shown that within all practical range of web depth to thickness ratio, that the flanges only method is conservative but sometime may be inefficient. Based on the study of these two methods, a very simple modification factor, which can be obtained conveniently by hand calculation, is proposed to improve the efficiency of the flanges only method. It is shown that the proposed modified flanges only method, while still always remains conservative, could be able to estimate the bending resistance of the girder more accurately than the original flanges only method. In most cases, the bending resistances predicted by the proposed method are within the range of 94% to 97% of those predicted by the more complicated effective width method.
DRNTU::Engineering::Civil engineering::Structures and design
Journal of constructional steel research
© 2013 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Constructional Steel Research, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:http://dx.doi.org/10.1016/j.jcsr.2013.06.012].