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The Design of Trusses and its Influence on Weight and Stiffness

Published online by Cambridge University Press:  28 July 2016

Jean Drymael
Jean Drymael*
Affiliation:
University of Brussels
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Summary

It is shown that weight can be saved, and stiffness gained by a proper choice of the design, that is the type of frame of any truss. A method is developed first to choose the best among several statically determinate designs. It is then demonstrated that, when a redundant truss has to carry one set of loads, it is always possible, by the removal of some bars, to get a statically determinate truss which is lighter, for the same ultimate stress. But the redundancy keeps its advantages when the structure has to carry several sets of loads in turn.

Type
Research Article
Information
The Aeronautical Journal , Volume 46 , Issue 384 , December 1942 , pp. 297 - 308
Copyright
Copyright © Royal Aeronautical Society 1942

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References

Note on page No 298 * In the original U is defined by ζ.

Note on page No 300 * In the original N' is denned by x.

Note on page No 301 * Any of the bars for which nk≠o might be chosen as the redundant bar.

Note on page No 302 * If, for all the bars, the absolute value of the axial force were to increase with |X|, Lwould be negative, which is impossible.

Note on page No 305 * The assumption Z<o would have led to

which is impossible