Question

Draw the influence lines for reactions RA, and RC of the beam below-given a=6 ft, b=6 ft, c=4 ft. Assuming that the span can be loaded with a 3.7 kips/ft uniform load of variable length, determine the maximum negative (down)value of the reaction RA in kips. Do not include the - sign. 000 Rc - a - obstaco

Answer 1

Influence line diageam (ILD) for reaction at thy any Support :- As per muller, to draw ILD for reaction at support remove the support and - lift the beam by lumit. 0 ILD for RA À lo42=121 C y » Y = 0 4 1 2 =113 - 0 o to ILD for RC H To 10142=121. u - o- t 2 = 32 a(y2 = 1 / 2

for RA negative mau= put load on CD Part RA = 317X3 X 4 X / 3 = 2:467k

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