Author: Popescu, N D
First published: N/A
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Popescu, N D
This review of the performance of candidates in the Institution Parts 2 and 3 examinations held in July 1970 is offered as a guide to those who are preparing for future examinations and to those members and others responsible for the teaching and training of potential candidates.
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
This paper presents the results of an investigation intended to obtain fatigue data for hybrid plate girders and to determine their fatigue strength at two million cycles. Fatigue tests were conducted on six welded hybrid plate girders with flanges of A441 steel and webs of A36 steel. Web slenderness ratios of 144 and 192 were investigated. A sequential test programme was devised to determine the maximum permissible stress range that will give a life of two million cycles.
A. Anthony Toprac and David J. Fielding