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The Structural Engineer, Volume 66, Issue 15, 1988
Now that the Great Ormond Street case is over, it is worth noting some of the findings made by the Judge in the only part of the action that went to trial. J.J. Ward
Mr H. B. Gould (F) (G. Maunsell & Partners): Mr Tait is to be congratulated on a very interesting and encouraging introduction, and I think the Institution also should be congratulated in having the second such discussion in less than a year.
The fabrication and erection plan of cable-stayed bridge construction includes the specification of the unstrained dimensions of the cables, girder, and towers. The assembly of the unstrained girder and tower elements forms the unstrained (fabricating) geometry of the structure. These data comprise information for fabrication and erection as well as providing a reference for 'forces’ and ‘displacements’ in the associated static or dynamic analyses. This paper presents methods for generating these data. In particular, the unstrained geometry calculations use conditions of equilibrium and compatibility and follow a relaxation process. The computer programs developed are applied to typical cable-stayed bridges and have been found to yield useful, reliable, and efficient solutions. P.K.A. Yiu and Professor D.M. Brotton