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Rp-Behavior of Core Sandwich Steel Girders. pdf

The main objective of this research is to examine sections that have corrugation in web or flanges or both and compare them with flat plate girder beams. Twelve models were manufactured and tested under the action of two concentrated loads applied at a distance of one-third from supports. Models were classified into four groups, where the first group contains a flat plate beam. In contrast, the second group includes five samples with a thickness of corrugated flange equal to 20 mm. The third group consistsof two models with a flange corrugation height of 30 mm with different web types. Finally, five specimens of corrugation 35 mm height with varying parts of corrugation were assigned to group four, comparing results of control beam (group 1), it was found from the experimental test that ultimate load value at failure could be increased by 26.5% with a reduction in deflection by about 35% for beams with web corrugation and 30mm flange height corrugation. A reduction in both ultimate load and deflection by 35.8% and 34.8%, respectively, were recorded for a corrugated section with a flat plate web. Also, failure modes for most full corrugated sections were changed from flexural to shear failure.
An analysis by finite elements was also examined using a program (ABAQUS) to perform numerical verification of the models made. A good convergence was found between numerical and experimental results in terms of the final load, maximum deformations, and failure pattern as well, which allows using the model for new parameters investigations.
Three new parameters were numerically examined. These parameters are the effect of web corrugation and flange corrugation patterns on two types of corrugated beams. It was