This study investigates whether the crack torsional moment equation of the concrete structure criterion can be applied even when the criterion for the minimum torsional reinforcement amount and spacing is not satisfied. As a result of the experiment, it was found that when the interval of the closed stirrup is wide, it does not satisfy the crack torsion moment induced by the thin-wall theory. However, when the strength reduction factor of 0.75 is applied, the torsional moment criterion is satisfied. Therefore, it is considered that the torsional moment can be considered even if the criterion for the minimum rebar spacing is not satisfied.

• 권민호(경상대학교 토목공학과) | Kwon Min-Ho
• 김진섭(경상대학교 토목공학과) | Kim, Jin-Sup
• 정영석(경상대학교 토목공학과) | Jeong Yeong-Seok