Finite element analysis on flexural performance of the bending capacity for concrete beams reinforced with ECC and aluminum alloy bars

Abstract

The flexural performance of concrete beams reinforced by engineered cementitious composites (ECC) and embedded aluminum alloy bars was analyzed by finite element method, and compared the results with the existed experimental values to verify the correctness of the finite element model. On this basis, the effects of different ECC reinforcement thickness, the number of aluminum alloy reinforcement roots and the diameter of aluminum alloy reinforcement on improving the flexural performance of the reinforced beams were studied. The results showed that: ECC-aluminum alloy bars reinforcement can significantly improve the flexural performance of reinforced concrete beams, and the ultimate load capacity of reinforced beams was improved by 5.88%~73.66% compared with that of control beams; the effect of ECC-aluminum alloy bars reinforcement method was better than that of reinforcement with ECC material only; the degree of improvement of yield load of beams by ECC reinforcement layer was greater than that of ultimate load; The thickness of ECC reinforcement layer, the number of aluminum alloy reinforcement roots and diameter were proportional to the reinforcement effect of reinforced beams, among which increasing the number of aluminum alloy reinforcement roots had a great influence on the flexural load capacity of reinforced beams, which provided for the calculation of flexural performance of reinforced concrete structures.