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Title |
Prediction of the Torsional Strength of Reinforced Concrete Beams Subjected to Pure Torsion
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Keywords |
콘크리트의 비틀림 저항; 순수 비틀림; 적합조건; 평형조건; 트러스 모델; 철근콘크리트 보; concrete contribution for torsional moment; pure torsion; compatibility; equilibrium; trusss model; reinforced concrete beam |
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Abstract |
The current ACI design code does not take into account the contribution of concrete for the torsional moment of reinforced concrete(RC) beams subjected to pure torsion. This code is not capable of evaluating the inter-effects between concrete and torsional reinforcement on the torsional resistance of the RC beams. Some test results indicated that the current ACI code was not successful in predicting the observed torsional moment of the RC beams with reasonable accuracy. The research reported in this paper provides an evaluation equation to predict the torsional moment of the RC beams subjected to pure torsion. The proposed equation is derived from the equilibrium as well as compatibility equations of the truss model for the cracked RC beams. Comparisons between the observed and calculated torsional moments of the 66 tested beams, showed reasonable agreement.
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