This historic book may have numerous typos and missing text.
Purchasers can download a free scanned copy of the original book
(without typos) from the publisher. Not indexed. Not illustrated.
1904 Excerpt: ...expression for the influence line of // for a
load, P, traveling over the bridge. It is equally true for the main
and for the side spans, for which, of course, the corresponding
values and summations must be used. I / 8 / -i I' I %fMLi I and
similarly for the side spans. The total horizontal cable and chord,
due to a full uniform load, p, per horizo: length on the main span
only, we then get as: n2--4 n2s r-. trussi For a full load on one
of the side spans: -/. X D For the load extending from anchorage to
anchorage, the each span must be added, so that H/ml. = Hn + 2H, To
obtain the proportions of U sustained by cable and stiff chord, the
foregoing values of //are multiplied by the prop m and n, deduced
before. H for a Single Concentration.--If a single concentrated
acts on a simple beam, of a span, /, at a distance, P, from the
poi' support, the expression for the bending.moment due to it wifl
& p the form P(l--v) x m -v = l for any section, x, between o
and v, and P (l--x)v sun oporl loac Hfor a Uniform Load Continuous
from Point of Support to any Sectint.--If a uniform load, p, per
unit of length, advances continuously from one end of a simple
beam, of a span, to any point distant u from it, the expression for
the bending moment due to this load will be: m0-u=-(2/-u)-(22) for
any section between o and u, and mu-i=-(l-x) (22a) tor any section
between u and I. Sabstituting these expressions for the simple-beam
bending moment, m, in the numerator of the general equation for //,
we get, for a continuously advancing load, p: To obtain the value
of H due to a partial uniform load between any 'wo points, we need
only subtract, from the value computed from the sbove equation for
the load extending from the Btipport to the farther...
|Country of origin:
American Society of Civil Engineers.
||246 x 189 x 13mm (L x W x T)
||Paperback - Trade
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