Theoretical Investigation of the Flexural Behavior of Concrete Beam Containing Internal Steel Plates

Douaa Najah, Majid D. Mutasher


The main objective of this paper is to investigate the flexural behavior of simply supported RC beams strengthened internally with steel plates with three configurations. This investigation was done by using the ABAQUS program version 2017. The main parameter in this investigation was the configuration of steel plates (flat, curve, and round). For supporting Finite Element (FE_ results, four RC beams were cast with a rectangular cross-section of 200mm×150mm and a total length of 1200mm, one of these beams was a control beam, and three other beams were strengthened with 2mm steel plate with three different configurations (flat, curve and round). The experimental and numerical results showed that using steel plates as internal strengthening enhanced the load-carrying capacity for all tested beams, with a range of 15-24 % from the ultimate load of the reference beam. Furthermore, a specimen strengthened with a flat steel plate exhibited the highest increase in ultimate load. A parametric study was conducted to investigate the effect of concrete thickness and compressive strength, yield strength of steel plates, and the existence of a hole in steel plates.

Keywords: steel plate, flexural behavior, internal strengthening, finite element, ABAQUS.

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