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The paper provides the designer of precast concrete buildings with a valuable design aid. To enable general design rules to be established within the context of current design practice it would be of great assistance if the authors could offer some
advice concerning the following:
The purpose of this short paper is to describe in a simple way the operation of the finite element method and to indicate the principles involved. This has been approached by a description of the general processes of structural analysis by the stiffness method using simple matrices when their use is advantageous. The finite element method is presented as an approximation in which a continuum is replaced by a number of discrete elements and an indication is given as to bow the engineer can satisfy himself as to the accuracy of his results. It has not been possible to discuss the suitability of types of elements for particular purposes but details of some of the commonly used elements with appropriate references and comments have been given. Reference has also been made to the use of computers infinite element applications.
O.C. Zienkiewicz, D.M. Brotton and L. Morgan
Early thermal and shrinkage cracking of reinforced concrete walls is a frequent cause for concern on construction sites, especially for water retaining structures. The revised edition of CP2007 (BS5337) includes specific limit state design recommendations to control the cracking in water containing structures by means of the distribution reinforcement. The paper therefore considers a service reservoir for the South Staffordshire Waterworks Company which was designed to the new recommendations, and which provided the opportunity of comparing theory with practice not only for this design but also with a typical design to the former Code, CP2007:1960, on which the amended design was based. Other equally satisfactory design solutions which would
have been possible in accordance with the new recommendations are also indicated.