الفهرس 
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Abstract
One of the problems posed in the construction industry since the steel structures
was implemented is how to minimize weight and expense, which mainly depends on the thickness of the web so that corrugated steel webs have been recently introduced to replace the stiffened steel plates of plate or box girders to allow the use of thin plates without stiffeners for use in building and bridges, and to increases the out of plane stiffness and buckling strength of girders. Recently, the possibility of using girders with corrugated web (GCWs) as an alternative to save cost has been explored through
developments in welding technology.
Cutouts in plate girders webs combine beauty, versatility, and economy in steel design. In modern buildings, cutouts are frequently required to be provided in structural members so that building services may be incorporated into structural zones for simplified layout and installation. The objective of this research is to study the behavior of steel plate girders with corrugated webs (GCWs) having cutouts under shear forces and bending moments experimentally and analytically.
The first part presents the experimental study for nine girders with different profiles for girders with flat and corrugated webs having cutouts tested to failure under the effect of one concentrated load.
In the second part, two methods are used analytically. First, The Finite Element Analysis is performed using ANSYS V.20 Work Bench software on large number of girders as an alternative to derived equations in case of local buckling existence. The finite element results are verified using the experimental results conducted previously. Secondly, Minimum Potential Energy is used to form a general equation to derive the local buckling under the effect of shear force only and also the effect of shear and bending moment using the real boundary condition. Girder webs are assumed as simply supported at vertical sides and built-in at the junction with the flanges. Local buckling assumes that the corrugation fold as isotropic plate.
Comparisons between the results from the proposed equation using energy method and the finite element analysis results are found to be satisfactory. Another comparison of experimental results between flat and corrugated girders to study the difference on girders capacity of having one or more cutout in girder webs. As expected, the ultimate strength and failure mechanism, the results of ultimate load carrying capacity decreased with the existence of one or more cut-outs. Geometric characteristics effect on failure modes and design charts for some corrugated webs with different dimensions and different cutouts size based on the proposed equation were presented.
Pursuing the importance of obtaining a convenient design procedure for the design of GCWs with cutouts, many graphs are presented to obtain the maximum theoretical critical stresses for such girders.
Finally, suggestions are made on how to use the present solution in the design procedure adapted in the Egyptian code of practice for steel Construction and Bridges based on the Allowable Stress Design approach and Load and Resistance Factor Design as well as the possible specific design guide, the Euro-code EN1993-1-5 and Design Manual for PC, Bridges with Corrugated Steel Web 1998.