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Fifty-two tests on the behaviour and ultimate strength of perforated steel web plates subjected to inplane bending and shearing are described. The plates were tested as the webs of I-section girders. Their depth/thickness ratios varied between 90 and 180. All but two of the panels had an aspect ratio (b/d) of 0.7, and each perforated panel had a centrally placed hole. The holes had unreinforced edges and were of either circular or elongated circular shape. These panels are typical of those found in ship-type structures. The effect of varying the shear/moment ratio (F/M) in the panel on its strength was studied. Stresses in one test panel were calculated from strain measurements at loads up to collapse. It was found that the experimental results for the stockiest plates could be reasonably predicted using an existing approach based on simple plastic theory. This approach could not be applied to the more slender panels. The method based on the tension field approach which has been proposed for the analysis of such panels was unable to predict the failure loads of the panels tested. M.M.K. Lee, A.G. Kamtekar and G.H. Little
Steel frame structures in New Zealand-not so very rare! Mr Charles Clifton of the NZ Heavy Engineering Research Association (HERA) writing from Auckland, is concerned to rectify a misleading impression which he feels has been given regarding structural steelwork in New Zealand in The Structural Engineer of 18 October last: The report on the 1988 Presidential tour was both interesting and informative and, as a founding committee member of the New Zealand Structural Engineering Society (SESOC), I look forward to close links being forged and maintained between SESOC and IStructE. Verulam
The recently announced Structural Brickwork Awards are the 4th since their inception by the Brick Development Association in 1982, and a few observations are timely regarding lessons learnt from the awards and perceptible trends to be seen in structural brick design. The intention of the award scheme was to encourage the use of brickwork as a primary structural material - hardly a new concept in 1982 but lacking focus. They have been an undoubted success, and the changes in design and construction techniques over the last few years are significant. There is far more widespread awareness of the behaviour of brickwork under stress, and some masonry design now forms part of many more university engineering courses. This was less usual in 1982. A high attendance at the CPD courses run jointly by the Institution and the BDA points in the same direction. S.B. Tietz