Torsional and Other Properties of Prestressed Concrete Sections

摘要

In this paper, Prandtl's membrane analogy has been extended to facilitate the calculation of the properties of typical prestressed concrete sections. This method is particularly useful for computing the St. Venant torsional constant, J, of typical prestressed concrete girders or to compute all the cross-sectional properties of any irregular shaped open cross section. The membrane analogy requires the evaluation of the volume of the fictious soap bubble.