Publisher's Synopsis
Excerpt from The Theory of the Continuous Girder: Its Application to Girders With and Without Variable Cross-Sections
Continuous bridges - with the exception of draw bridges are not considered economical and are not designed by, American engineers. This probably accounts for the brief treatment the theory of the continuous girder receives in text books and engineering literature.
With one or two exceptions, all American treatises con sider the moment of inertia as constant and deduce two equations for the moment over any support, one to be ap plied when the loads are on the left of the support and the other when the loads are on the right. These two equa tions combined would, of course, give the moment over any support for any load, but only when the moment of inertia could be assumed as constant, as in girders with parallel ?anges, where it might be undue refinement to consider the cross-section as variable.
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