Experimental and analytical investigation of bending and impact properties of steel composite beams with high performance concrete

In this research, the mechanical properties including bending strength and impact resistance for steel composite beams with high performance concrete are discussed. In the construction of the steel part of the specimens, the shield cross-section grade 4 is used in the tensile part of the sheet with a thickness of 5 mm and two widths of 30 and 40 mm and a length of 70 cm. It should be noted that the compression wing of some specimens is made of concrete with Different steel reinforced fibers. Self-compacting concrete with 3 percent of different steel fibers, which are 0, 0.5, and 1 percent, was used in making the concrete of the specimens. The results of the impact tests showed that the amount of energy absorption as well as the initial maximum force increased with the increase in the fibers percentage that the highest energy absorption is related to the w4hc4sf1 beam, which has increased by 0.09% compared to the specimen without concrete. Regarding the results of the bending test, the resistance value increased intermittently with the increase of fibers. The w4hc4sf1 beam had the best performance, and its strength increase compared to the same specimen without concrete was equal to 204%.