순수비틀림을 받는 철근콘크리트 보의 비틀림 강도 예측

Prediction of the Torsional Strength of RC Beams Subjected to Pure Torsion

The evaluation equation of torsional moment for reinforced concrete members in ACI 318-99 ignores the contribution of concrete, T$_{c}$. Several research indicates that the torsional moment of concrete is in effect, specially for the members in which the longitudinal and transverse reinforcement content is small. This paper proposes an evaluation equation of torsional moment taking into account the contribution of concrete. According to the comparison with the 66 test results, the torsion equation in ACI code underestimated or overestimated the real torsional moment of reinforced concrete beams. On the other hand, the proposed torsional equation is shown to be in a good agreement with experimental results.s.