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The plane truss is subjected to a load as shown in Figure 4. Take E = 200 GPa and cross sectional areas of members 1, 2...

The plane truss is subjected to a load as shown in Figure 4. Take E = 200 GPa and cross sectional areas of members 1, 2 and 3

The plane truss is subjected to a load as shown in Figure 4. Take E = 200 GPa and cross sectional areas of members 1, 2 and 3 as 150, 250 and 200 mm2 respectively a) Assemble the upper triangular part of the global stiffness matrix for the truss b) Determine the horizontal and vertical displacements at node 4 c) Calculate the forces in each member of the truss. (25 marks) 20 kN 3 60° 4 1.5m 2 2 20m
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Answer #1

20kN E 200 5pa = 2x 10 mm A 15D mm A-250 mm A200mm 3G.S89 Sro Ange 7 measwned toTE positiuc 2 1 1-0us in anh-bckwise direc toin 216 369 F9.196 KNens ion 9.196 kN -20000 1-32105 X1D Cos 216.869 +5.9016XID 20000 59016x10) sin 1s 3215x 10 COS 180 + 80 T

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