File:Statically indeterminate stresses in stiff framed structures (1915) (14802815883).jpg

Identifier: staticallyindete00rich (find matches)
Title: Statically indeterminate stresses in stiff framed structures
Year: 1915 (1910s)
Authors: Richart, Frank E. (Frank Erwin), b. 1892
Subjects: Structural frames Structural design Strains and stresses Theses
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Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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71. produced by a given loeding, the average variation being only tento fifteen per cent. On the other hand, a slight change in k prod-uces a large change in the moments and reactions. These results are of interest when applied to the bent of amill building. In Fig. 54, if the kneebrace is a solid gusset plate, as is often the case, a rigid connec-tion exists between the truss and thecolumns? and the bent may be consid-ered as a three sided frame with atop girder of variable moment ofinertia. Since the least value ofn is undoubtedly greater thanand since a change in n does not have very much effect on the valueof H, it follows that the probable value of H will lie between thecurves for which n » % and n «oo f on Diagram II. Hence the leewardreaction due to a uniform horizontal wind load j£ on the side of thebuilding will be about ,3 f , and the reaction on the windward col-umn will be about ,7 ;, This is quite different from the customaryassumption that the horizontal resctions on

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