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Applying a new variant of the energy method, established by the author, differential equations of the vibrational movement are obtained for the axes of the rods and for
Professor Ing. N.D. Popescu
The strength and loading statistics used as a background to structural safety measures in design are commonly expressed by frequency distributions in mathematical form. This paper points out that the more relevant parts of frequency distributions-the lower tails of strength curves and the upper tails of loading curves-are in practice limited or truncated. The effects of this are illustrated by a bridge example, using a numerical procedure to deal with the non-mathematical frequency curves involved. The value of proof tests on structures and of controls over their loading is demonstrated.
Sir Alfred Pugsley
The conditions for the 13th Biennial Competition for the Drury Medal, founded by the late Mr. F. E. Drury (Past President) are now available.