On the theory and calculation of continuous bridges (1876)
Merriman, Mansfield, 1848-1925, Making of America Project · New York, D. Van Nostrand · leaf 33
te the strains in all thepieces of the third span, due to this deadload. We first take from the triangles for a 28 girder of seven spans. Sq = — wl and M3=-— wl*. We have for our case, w=200 Ibs. and 1=60 feet. HenceS3 — 5916 Ibs. andM3=55775 Ibs. ft. Inserting these and the value of w in theabove… … only to longitudinal strains, the loadshould not be strictly uniformly distributed but concentrated on the upperchord at the panel points B, C, etc. andon the lower chord at a, b, c, etc. Allowing that each of these points receives an 29 equal weight and that a and g, count asbut one point, we have…
Bridges · Girders, Continuous
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