Author: Binnie, A M
First published: N/A
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Binnie, A M
As in the Author’s Reply (“Structural Engineer,” May 1942), it is stated they are interested in my answering certain questions submitted. I am pleased to give these as under: (1) The value of 800 lbs./sq. in. for the shear stress obtained by Freyssinet in an unreinforced specimen is certainly high. Freyssinet applied for the manufacture of these very small specimens the application of his process of vibration, compression (by hydraulic pressure) and heating in strong tubular moulds. (This compression applied for manufacturing the specimen is not to be confused with the precompression applied on a part of the specimen by pre-stressing of the reinforcement).
THESE notes and diagrams have been prepared with the following limited objects. Firstly, to compare the moments in beams and columns which result from the application of the three methods of computation sanctioned in the L.C.C. Memorandum (1938) as revised in 1939 (Clauses 12 and 19), and to express these methods in the form of diagrams. Secondly, to compare alternative methods of calculating end moments in beams and colmumns for a monolithic frame (Clause 12, Section (i)) and thirdly to shew approximately the effect on beam and column moments of some secondary factors which are usually ignored.