Predicting Torsional Response of Thin-Walled Open RC Members

by Petar Krpan, Asst. Prof.; Ecole d'Architecture, Univ. of Laval, Quebec, Canada,
Michael P. Collins, (M.ASCE), Prof.; Dept. of Civ. Engrg., Univ., of Toronto, Toronto, M5S 1A4 Canada,

Serial Information: Journal of the Structural Division, 1981, Vol. 107, Issue 6, Pg. 1107-1127

Document Type: Journal Paper

Abstract: Procedures for calculating the torque-twist response of thin-walled open reinforced concrete members are presented. Traditional theories for predicting the warping torsion response of elastic, homogeneous beams can be modified and extended so that post-cracking and inelastic warping torsion response of reinforced concrete open thin-walled beams can be predicted. The theoretical procedures are illustrated by predicting the response of a reinforced concrete channel beam attached to rigid abutments and loaded with a torque at midspan. The predicted response includes not only the relationship between the applied torque and the resulting rotation but also estimates of the torques at which the concrete will crack, the reinforcement will yield and the member will fail.

Subject Headings: Reinforced concrete | Concrete beams | Torsion | Warpage | Cracking | Elastic analysis | Homogeneity |

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