Question

4-The structure represented in the figure consists of the AEC and BDC bars connected by a C-joint. The AEC bar is 8m between nodes.

Under the conditions stated and according to the dimensions of the figure, calculate:

a) The reactions on supports A and B.

b) The forces acting on the AEC and BDC bars.

100N 1309 E 2m B Am

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Answer #1

Keep in mind that, forces in AEC and BDC not same force throughout, different forces are there due to joints E and D in between respectively.

  1. So forces in members AS, EC, CD AND BD calculated individually. Solutions 100 N с FBD: compression (C) T $300 * Tension (T) T E D 2m C I 2007 A B - Bra Ax lay 4m By In above ABD, AEC = 8m 4 Ay = = 200- 76.8 5123.2 N CM) consider joint A, FAE EF=0 Ax 1600 Ax – FAECOS 60 =0 Ay Ana FAEC0560 & Efy=0 Ay = + FAE singo FAnswers FAE = 142,259 N(C) O N Ax=71.129 N() Ba 123.2 N (1) By F FEC 200 (C) Ay - Feo 173.205 CT) 76.8N (1) FBD W 76,8 10)
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