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FEM Analysis of Hybrid Composite Beams Made of Normal Concrete and Foamed Concrete
Fakhruddin
Aip Conference Proceedings
Abstract
Flexural performances of hybrid composite beams, a combination of two different layers of normal concrete and foamed concrete, were investigated numerically using FEM Analysis. Three beams were tested with dimension 150 mm in width, 200 mm in height and 3300 mm in length. Two composite beams were made with different depths of foamed concrete, which were 50 mm (HB-50) and 100 mm (HB-100). The results of these beams were compared with the control beam (CB) with full layer of normal concrete. The flexural performance of beams was evaluated in terms of load-deflection response, load-strain of concrete and steel bar, crack pattern and failure mode. The results showed that foamed concrete at hybrid composite beams reduced the ultimate load of the beams. Compared to the control beam, the ultimate load of HB-50 and HB-100 was decreased by 29.5% and 30.8%, respectively. However, different depth of foamed concrete at the hybrid beams showed an insignificant effect on the ultimate load. The number of cracks on HB-50 and HB-100 was larger than that of CB. Some cracks in foam concrete do not propagate upward to the normal concrete layer. Finally, all the beams failed under the crushing of compression concrete.