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The Structural Engineer, Volume 49, Issue 5, 1971
In 1969, a study was made of the results of tests on eighty steel-concrete composite beams in which longitudinal shear stress was high, and a new design method for transverse reinforcement in the slab was deduced. This gave a more uniform margin of safety than the method of CP 117 Part 1: 1965, and showed that the amount of reinforcement could be reduced by about 35 per cent.
Mr. W. G. Cantlay (F): Although I am a partner in the author's firm I had no involvement in this project and would, therefore, ask a simple question. You have stated that you chose steel to achieve speed of erection but you have not stated whether composite construction was adopted forthefloors. I would ask you to make some comment as to whether your choice of steel met the requirement for speed of erection.
A description is given of a system of interconnected beams representing a right simply supported multiple web cellular deck with no intermediate diaphragms, followed by an outline of a method of analysing the response of such a system to any externally applied loading. A short computer program using this method of analysis is described. Results produced by this program are compared with experimental results of a model test and show agreement to within a few per cent. Finally it is shown how this theory was applied to the design of the New Cattle Market Bridge now under construction which when completed will carry the new Derby Inner Ring Road over the River Derwent. J.G. Parkhouse