Tests of large bridge columns. . are their distances fromthe column axis and Ei = Eu are the corresponding actual determination of this component requires that eachmodulus Ei be definitely known together with its orientation 28 Talbot and Moore have called attention in their tests of riveted joints to the fact that the paint usedin the assembly has some influence in determining the yield stress at which slipping occurs. (111. Station, Bull. 49, p. 47.) io6 Technologic Papers of the Bureau of Standards with respect to the column axis. (3) There is a component edue
Tests of large bridge columns. . are their distances fromthe column axis and Ei = Eu are the corresponding actual determination of this component requires that eachmodulus Ei be definitely known together with its orientation 28 Talbot and Moore have called attention in their tests of riveted joints to the fact that the paint usedin the assembly has some influence in determining the yield stress at which slipping occurs. (111. Station, Bull. 49, p. 47.) io6 Technologic Papers of the Bureau of Standards with respect to the column axis. (3) There is a component edue to the fact that perfect parallelism of the planes of upper. Fig. 65.—Showing types of eccentricity present in the columns tested and the characterof the corresponding stress strain (p, f) curves as a result of (a) initial curvature, (b)variations in component moduli, (c) imperfect bearing at upper head, rotation on pin,(d) angular deviation of axis of column from axis of testing machine, (e) slips from pinplates, (J) laminated structure face of column and head of the testing machine is planes will differ in general by a small angular amount 0. Tests of Large Bridge Columns 107 There will be under these conditions either one, two, or threepoint contacts on the upper head, the three or higher point con-tact denoting parallelism of planes, in which case 0 = o, and e3vanishes. (4) There is a component e4 due to the fact that evenwhen parallelism is attained the axis of the column is not in gen-eral truly normal to the planes of upper and lower heads of thetesting machine. It will intersect the planes of the lower andupper heads
Size: 1371px × 1822px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbraggjg, bookcentury1900, bookdecade1910, bookpublisher
