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Li, V. C.
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article
Flexural response of reinforced beam with high ductility concrete material
Abstract
<p>This paper reports on a study of flexural behavior of steel reinforced ductile engineered cementitious composite (ECC) members. ECC materials show extraordinary levels of strain ductility in tension (2-4%). Multiple microcracking in ECC delays fracture localization typically observed in normal concrete. Based on experimental stress-strain curves for ECC and reinforcing steel, a typical elastic-plastic model is assumed to derive the moment-curvature relation for reinforced beams in flexure. The resulting closed-form formulas are used in prediction of ultimate flexural capacity and ductility of beams made of ECC. Substantial difference in beams performance shows beneficial features of ductile ECC material. Direct design examples for beams and slabs using ductile or brittle materials present quantitative comparison of flexural behavior of structural members for typical design cases.</p>