. Stresses in railway structures on curves . eareas of influence lines are found from Fig. 28. The equivalentuniform load for shear in a panel is equal to the maximum shear inthat panel divided by the corresponding influence area. The maximum shears in the outer and inner trusses forcurved track are shown in Table 7. They are found by multiplyingthe influence areas by the corresponding equivalent uniform loadsshown in Table 6. Thus, for example, the area of influence linesfor shear in panel A B of the outer truss is and from Table6, the equivalent uniform load for shear in A B is 3100 l
. Stresses in railway structures on curves . eareas of influence lines are found from Fig. 28. The equivalentuniform load for shear in a panel is equal to the maximum shear inthat panel divided by the corresponding influence area. The maximum shears in the outer and inner trusses forcurved track are shown in Table 7. They are found by multiplyingthe influence areas by the corresponding equivalent uniform loadsshown in Table 6. Thus, for example, the area of influence linesfor shear in panel A B of the outer truss is and from Table6, the equivalent uniform load for shear in A B is 3100 lbs. perfoot. Hence, the shear in A B of the outer truss is equal x 3100 = 328,800 lbs. TABLE 6 Shears in Each Truss for Straight Track. Panel Shearsin lbs. InfluenceAreas EquivalentUniform Loadin A B 271,500 3100 B G 204,900 3190 G D 147,500 3305 D E 98,000 3430 E F 56 ,400 3510 F G 26,900 3770 G H 6,850 3850 (3) Maximum Figs. 31-33 are shown the influence lines for the 79. Jf?//ueffce. /-//res /rr Wa/rrertk •J OF I. S. 9. FORM 3 80
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