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Department of Civil Engineering
CIVL 7117 - Homework 5c
set cell vertical height

For the 72-bar truss shown below, determine the displacements and elemental stresses.  Nodes 1, 2, 3, and 4 are pin connections. Let  E = 107 psi and the A = 1.0 in2 for the first two stories and A = 0.5 in2 for the top two stories. Table 3 lists the values and directions of the two loads cases applied to the 72-bar space truss.

Table 3. Multiple Loading Conditions for the 72-Bar Truss

Case

Node

Fx (kip)

Fy (kip)

Fz (kip)

1

 

17

0.0

0.0

-5.0

18

0.0

0.0

-5.0

19

0.0

0.0

-5.0

20

0.0

0.0

-5.0

2

17

5.0

5.0

-5.0

 

 


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