Author: Parkhouse, J G
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Parkhouse, J G
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.
In a previous paper, full-scale and model tests on trough-shaped bunkers, rectangular in plan, were described, and experimental stresses were compared with those from conventional design and from an improved design method {which requires empirical allowances for the contribution of the plating to the longitudinal bending strength). This paper explains two theoretical solutions, the first allowing for shear panel action in the plating and overall hipped-plate behaviour in the bunker, the second utilizing a commercial space frame computer program allowing for in-filled panels. The results obtained compare favourably with those obtained previously by experiment and by the improved design method; either method may now be utilized to check and modify designs for this type of structure. E. Lightfoot and J.K. Withrington
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.