The Structural Engineer > Archive > Volume 66 (1988) > Issues > Issue 15 > Computation of Fabrication Dimensions for Cable-Stayed Bridges
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Computation of Fabrication Dimensions for Cable-Stayed Bridges

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