The Semi-grillage Method in Bridge Deck Analysis
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Published: 1990
Total Pages: 12
ISBN-13: 9780921303145
DOWNLOAD EBOOKThis paper outlines the semi-grillage method of analysis and applies it to slab and pseudo-slab bridge decks. Such an analysis is usually necessary if an economical and efficient design is to be achieved. The method makes use of harmonic analysis and the semi-continuum idealization of Hendry and Jaeger which was later extended by Jaeger and Bakht to include torsion. There are important differences, however. A flexibility formulation has been used which allows torsion, edge stiffening, slab membrane action, sideways deflection of longitudinal beams, and Poisson's ratio to be taken into account. Loads are applied to the supporting members using a simple local statistical distribution as in the grillage analogy method; hence the name give to the method. For the range of bridges to which it is applicable, the proposed method is superior to grillage analysis and requires less work than the finite-strip method. The method can be easily programmed and is ideally suited to a micro-computer. Two examples of plates are presented to illustrate the accuracy, versatility, and ease of use of the method. For the covering abstract of the Conference see IRRD Abstract No. 807839.