Torsional Moments and Member Rotation for Saint-Venant Torsion

Abstract

In the previous two chapters, the torsionai moment T acting on a cross section was assumed to be known. The determination of this torsionai moment T along the length of a member, however, is a problem of structural analysis to which various chapters of this book will be devoted. This and the next chapter will be concerned with the evaluation of the torsionai moment T _s for pure Saint-Venant torsion while Chapters 7 and 8 will deal with pure warping torsion T _ω. Chapter 9, finally, will consider a combination of Saint-Venant and warping torsion, T = T _s + T _ω. Chapter 10 summarizes the relative degree by which either Saint-Venant torsion or warping torsion dominate behavior, giving consideration to shape of cross-section, type of load, and slenderness of the member.