The Policy of Construction

Mr. John M. Rolfe: ‘It is pleasing to see the use of Johansen’s yield line theory being given some publicity, since it’s power and versatility are not as widely appreciated as they deserve. However, there a few points on which I would like to comment.'

The Informal Interdisciplinary Working Party of Engineering, Technology and Science Societies was set up with the purpose of defining areas of common interest between disciplines and debating such areas as seemed appropriate.

A series of uniformly and eccentrically prestressed concrete beams was tested in combined bending and torsion, with ratios of bending moment to twisting moment varying from pure bending to pure torsion. In all, twenty-three prestressed beams and two plain concrete beams were tested. The deflections and strains due to bending and torsion were measured at selected points. Professor R.H. Evans and M.G.A. Kahalil