. Stresses in railway structures on curves . 61) - ■ -1. 1903 ft. Having determined the average eccentricities for the differ-ent panel joints, we may proceed to find the ordinates of the in-fluence lines for the end reactions, shears and moments for the outerand inner trusses by the formulae Ordin. = ^ (b + 2e + 2qh) and Ordin= — (b - 2e) respectively. In all cases, b = , q = .1315,h = 10, and Zqh = 2 x .1315 x 10 = (1) End Reactions. In Fig. 27 (a) is shown the influence line for the end re-action of each truss for straight track. The influence lines for theouter and inner truss
. Stresses in railway structures on curves . 61) - ■ -1. 1903 ft. Having determined the average eccentricities for the differ-ent panel joints, we may proceed to find the ordinates of the in-fluence lines for the end reactions, shears and moments for the outerand inner trusses by the formulae Ordin. = ^ (b + 2e + 2qh) and Ordin= — (b - 2e) respectively. In all cases, b = , q = .1315,h = 10, and Zqh = 2 x .1315 x 10 = (1) End Reactions. In Fig. 27 (a) is shown the influence line for the end re-action of each truss for straight track. The influence lines for theouter and inner trusses for curved track are shown in (b) and (c)respectively. The influence ordinates for Fig. 27 (b) and (c) arecomputed as follows: Panel point A: Z = 1 e = Outer Truss: Ord. = ( - 2 x + ) = Inner Truss: Ord. = ——-( + 2 x ) = 7 Panel point B: 2 = - e = 8 Outer Truss: Ord. = f__( - 2 x .3724 + ) - .9508 Inner Truss: Ord. = ( + 2 x .3724) = .9050. I/rffaerrce lines far /Zear-/t0r?s Panel point C: Outer Trues: Ord, Inner Truss: Ord, Panel point ±): Outer Truss: Ord Inner Truss: Ord Panel point E: Panel point F: Outer Trues: Ord, Inner Trues: Ord, Panel point G: Panel point H: e = .9907 3 5 2 = 8 e = ( - 2 x ) = .5211 Z - 1 e = Outer Truss: Ord. = Inner Truss: Ord. = r( - 2 X ) = .4043 5 £ ( + 2 T( - 2 x ) = .3126 Z - 1z 4 e = .9907 Outer Truss: Ord. = Inner Truss: Ord ( - 2 x .9907) = .2272 2 ~ \ e - - 3724 Outer Truss: Ord, Inner Truss: Ord. = 1 73 (+ 2 x .9907 + ) = .9090( - 2 x .9907) = .6817 ( + 2 x + )= .8045 (+ + ) = .6561 e = x + ) = .4827 -( + 2 x .9907 + ) = .3030 ( - 2 x .3724 + ) = .1358( + 2 x .3724) - .1293 74 The are
Size: 1547px × 1616px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectra, booksubjecttheses
