Concrete Beams with Small Opening under Torsion

by M. Abdul Mansur, Research Fellow; Univ. of New South Wales, Sydney, Australia,
A. Hasnat, Prof. of Civ. Engrg.; Univ. of Basrah, Basrah, Iraq,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 11, Pg. 2433-2447

Document Type: Journal Paper


Based on the familiar skew bending model, methods of analyses are presented in this paper for predicting the strength of plain and reinforced concrete beams that are subjected to torsion and contain a small transverse opening. Test results of 22 beams—three of them having reinforcement around the opening are also presented. The predictions of the theory are compared with these results as well as those reported in the literature. They show good agreement. Also, a suitable form of reinforcement around the opening is proposed to eliminate the weakness due to an opening.

Subject Headings: Concrete beams | Torsion | Reinforced concrete | Skewness | Bending (structural) | Structural models | Flexural strength | Structural strength

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