Yield-line Analysis of Two Way Reinforced Concrete Slabs with Openings

This paper briefly reviews the subject of wind-induced oscillation of steel and reinforced concrete stacks, and attempts to collate relevant information from various sources in order to illustrate the major problems to be overcome by the practical designer. Useful practical parameters have been extracted from this information for use in the design of circular steel and reinforced concrete stacks. K. Irish and R.G. Cochrane

The principal theme underlying the paper is the development-from a structural engineering standpoint-of a form of construction for high riseflats, based essentially on ‘factory-made’ components, on the one hand quicker to build than more traditional forms of in situ reinforced concrete construction and, on the other, comparable in terms of cost and also structural behaviour if subjected to an abnormal load.

January 1971 was the first occasion that the Institution examined candidates for corporate membership in the Part 3 Examination only; and the first time that the Technician Test was set. This review of the performance of both groups of candidates is based upon the reports of the respective examiners, all of whom are practising chartered structural engineers with an average age of well below forty.