Design of Reinforced Concrete in Torsion

Abstract

In analyzing space structures torsional moments may be readily determined by the method of successive approximations. For a given torsional moment an economical section is the square. If it is reinforced with 45° spirals such a section lends itself to mathematical investigation and a rational design procedure can be developed. The percentage of reinforcement in a rectangular section can also be approximated. For convenience of reference, a complete list of the letter symbols used in this paper is given in the Appendix.