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The Structural Engineer, Volume 65, Issue 11, 1987
Last year in his Presidential Address, Ted Happold suggested that all Presidents make basically the same speech, being conscious that they represent the entire membership, so that they are expected: -to perceive and explain clearly possible directions for the profession -to produce an extra awareness which not only extends to us but also influences how others see us -to ask questions hopefully of all the membership -to raise our vision K.C. White
Fixing window glass The use of a silicon adhesive in a relatively new method of fixing glass was described by Mr G. V. Francis in our column in July 1986. In this method, silicon adhesive is applied around the perimeter of the glass in lieu of an exterior metal stop, mechanically fixed to the frame. Mr Francis' request for the views of readers resulted in letters (November 1986) from Mr G. E. Bratchell and Mr A. Wenham-Prosser, of whom particularly the latter expressed reservations and mentioned possible dangers and difficulties. Verulam
The behaviour of steel columns provided with semi-rigid end restraint typical of that produced by any of the usual forms of beam to column connection is analysed by means of a computer program using the finite element method. The non-linear variation of connection stiffness with rotation is allowed for by an accurate representation of the connection momentr otation (M-O) characteristic. Results are presented for one particular combination of variables-termed the ‘basic problem ’-which demonstrates how reduced column lateral deflections lead to enhanced column strengths. A systematic variation of the main parameters has enabled the relative connection stiffness to be identified as the most important factor in determining the extent to which a particular connection type will be capable of increasing the strength of a given column. When cast in the form of effective length factors for use with traditional methods of column design, the results suggest significantly lower values than those customarily recommended at present. S.W. Jones, D.A. Nethercot and P.A. Kirby