Author: Snow, F S
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Snow, F S
The Structural Engineer, Volume 14, Issue 1, 1936
Mr. Shelley asked the meeting to accept his published paper as read, and proceeded to give his replies to a number of questions which had been addressed to him in writing in response to the invitation contained in the footnote on page 429 of the November issue of The Structural Engineer.
1. Introduction. VARIOUS methods of solving continuous beam problems have been published, but all those known to the authors involve the drawing of complete bending moment diagrams for each position of the load. From these diagrams the influence quantities can be obtained by measurement and calculation. In the following paper, a method of drawing the influence lines directly is presented. The case of a three-span beam has been taken, as this is very common in practice, but the method can easily be extended to more complicated cases. Some of the expressions appear a little cumbersome when symbols are used for the span lengths, but for actual numerical cases they are very simple, as will be seen by the example in Section (3). R.J. Cornish