Author: Stussi, F
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Stussi, F
The Structural Engineer, Volume 30, Issue 9, 1952
The CHAIKMXN. proposed a vote of thanks to the authors and declared the meeting open for discussion.
Beton Precontraint, by Y. Guyon. Preface by E. Freyssinet. (Paris : Eyrolles, 1951.) Pp. 728, 1O in. x 7 in., 503 Figs. 4,500 Fr. As the author points out in the preface, prestressing is a general principle which may be employed by different means in a great variety of cases. To write a complete treatise on the subject seems to be an impossible task. The purpose of the author is to develop general principles by analysing a few applications in detail and to describe the methods of execution which may be adopted for other applications. The present book, comprising 700 pages, is the first volume of a comprehensive work on the subject.
The paper describes an investigation into the accuracy of determination of the torsional properties of a noncircular section by the membrane analogy and by relaxation methods. A circular section with a circular groove was investigated, the section being considered most suitable because an analytical solution is available and because it has a region of high stress comparable to the re-entrant comers of structural sections in which the authors are interested. W.B. Dobie and A.R. Gent