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David Lazenby will succeed James Armstrong as President of the Institution 1990-91 at an Ordinary Meeting at Institution headquarters on 4 October. The handover ceremony begins at 6pm, when Mr Lazenby will deliver his Presidential Address ‘Whose Institution is it, anyway?’, the full text of which will be published in The Structural Engineer in November.
Professor W. M. Jenkins (F)(Hatfield Polytechnic) Dr. Cunningham’s paper is a welcome contribution to the growing body of knowledge of ‘semi-rigid’ connections, particularly since he has directed his studies to the implications for design of such connections. The important practical aspects of connection behaviour have been correctly identified in the paper and are (l) non-linear moment-rotation characteristics with the connection stiffness reducing as applied moment increases; (2) considerable ductility and, with satisfactory design, consequent rotation capacity at ultimate conditions; (3) a complex interaction of the design variables and consequent difficulty in predicting strength and (particularly) stiffness.
U-frames are an available option used to brace the compression flanges of beams used in deck-type composite bridge decks and in halfthrough bridges. E. Jeffers