. American engineer . t. nien. for rleflection at the extreme end of the overhang, take the originX at .1 where the summation of moments of areas about rl is: Distance Area. from Origin A. Moment. 13,248 719,366 9,264 392,794 5,904 180,072 3,120 58,750 912 7,2961,358,278 1, „,. r 1 r , rrr .047 in. perpendicular disi>lacement of the beam at A from29,000,000 the tangent to the elastic curve at B. Negative upward deflection at A of the tangent to the elastic curveat B is; 60 in. X tan. 14 nun. 26 sec. = —.252 in. —.252 in. + .047 in. = —.205 in. upward defl
. American engineer . t. nien. for rleflection at the extreme end of the overhang, take the originX at .1 where the summation of moments of areas about rl is: Distance Area. from Origin A. Moment. 13,248 719,366 9,264 392,794 5,904 180,072 3,120 58,750 912 7,2961,358,278 1, „,. r 1 r , rrr .047 in. perpendicular disi>lacement of the beam at A from29,000,000 the tangent to the elastic curve at B. Negative upward deflection at A of the tangent to the elastic curveat B is; 60 in. X tan. 14 nun. 26 sec. = —.252 in. —.252 in. + .047 in. = —.205 in. upward deflection of beam at A. The problem as stated, assumed a uniform section from thesupport to the tree end of the overhang. In this case, the commonformulas ( where P. and / are constant) for cantilever deflections \\(uilil ha\e hcen sulVicient. of course adding (aluchraically) tliedeflection due to the inclination of the tangent to the elastic curveat support; hut for applications of draft gear and splicing, the. 12—JYL Curve for Center Girder. overhang is not usually a uniform section, therefore the sameinethod was used for overhang as for points between span. Fig. 13 shows the final deflection curve, greatly exaggerated, and ^) 1 s is II 1 ll
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
