Abstract
THIS is a reprint in book-form, with additions, of a series of articles which appeared in Engineering in the autumn of 1906. Those who have had any experience of such work will know how tedious is the process, as usually conducted, of determining the maximum straining actions on a railway girder supported at the ends, due to any given type of train load, and will appreciate the methods here given, which are characterised by directness, simplicity, and comparative brevity. The author uses analytical computation with systematic tabulation, and also, as an alternative method, graphical diagrams based on a clever adaptation of the ordinary bending and shearing force diagrams. By one or other of these methods, and especially the latter, the “equivalent” uniformly spread loads for both maximum bending moments and shearing forces are quickly and easily determined. The investigation is limited to the force actions on the bridge taken as a whole, and does not consider separately the resistances offered by the platform and main girders, but so far as the subject is dealt with the author is to be congratulated on having produced a most useful and practical work.
Moving Loads on Railway Underbridges, including diagrams of Bending Moments and Shearing Forces, and Tables of Equivalent Uniform Live Loads.
By H. Bamford. Pp. iv+78. (London: Whittaker and Co., 1907.) Price 4s. 6d. net.
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Moving Loads on Railway Underbridges, including diagrams of Bending Moments and Shearing Forces, and Tables of Equivalent Uniform Live Loads . Nature 79, 128 (1908). https://doi.org/10.1038/079128a0
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DOI: https://doi.org/10.1038/079128a0