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Q2: Draw the influence lines for the members HC and CD of the truss shown in Fig. (2), and then determine the maximum tensile
18 с D 4@24-26 (2
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Answer #1

G of Tre 18! B VA 4x24 = 96 Let a unit load pass through the truss from A to E, which is at a distance of x from A. Ev=o VA

for 48< 22962 •Fec {MA O VA (24) - Fee (18) = 0 (96-) 4 For 72 SH-Od Fan ( 4 ) Fael ) + Fax = 0 FAG ( 4 ) + Fre ( 4 ) = x2

ILD for HC 0.6 0.41667 0.4 0.20833 0.2 0 0 24 48 72 96 -0.2 -0.4 -0.6 -0.625 -0.8 x(Feet)

ILD for CD 1.2 1 1 0.8 0.667 0.6 0.4 0.333 0.2 0 0 24 72 96 48 x (Feet)

40.41667 Balu 148 96E 2 24-C (ILD for HC) 0.625 0.625 5 Tano x 12 A (4-0) 7.5(24-x) = 5x 180 = 12.5x xa 14.4 Max tensile fre

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