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The Structural Engineer, Volume 64, Issue 1, 1986
Suddenly applied loads Readers will recall a letter from Mr N. W. Sutton (September 1985) in which he sought help in resolving a difficulty he had found in calculating the stress in a tie bar due to a suddenly applied load. His letter brought a very substantial response from members, which was referred to in the column in December. Since then we have had more letters on the subject, from Mr F. Myerscough of Preston, Mr N. Jackson of Dundee, writing from Riyadh, and Prof. S. R. Reid of UMIST. Each of the writers points out the error in Mr Sutton’s reasoning, and Prof. Reid adds further comments of more general interest. Verulam
The term ‘model’ was formerly used mainly to denote physical scale representations of objects. Our usage of this term in engineering is widening. For example, we talk more of ‘analytical modelling’ rather than of ‘structural analysis’ because we do have a much wider choice of models than in the pre-computer era. To some extent it is the development in the use of computers that has caused us to think more deeply in terms of models. In order to program a design process, a model of the process is needed. Professor I.A. MacLeod
Mr D. A. Langdown (F) (Costain Construction Ltd.): First, I would congratulate the authors on their paper which describes a job with a number of very interesting features, particularly in relation to ground works.