GATE CE 2021 Set 1 — Question 32
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Structural Engineering → Determinate Structures & Energy Methods → Unit Load Method
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Question
A truss EFGH is shown in the figure, in which all the members have the same axial rigidity . In the figure, is the magnitude of external horizontal forces acting at joints F and G.
If kN, kN and m, the magnitude of the horizontal displacement of joint G (in mm, round off to one decimal place) is __________.
Correct answer
0.9 to 0.9
Solution
Using the unit load method, the horizontal displacement at G is given by , where are member forces due to external loads , are member forces due to a unit horizontal load at G, and .
1.Calculate member forces due to at F and G.
2.Calculate member forces due to a unit horizontal load at G.
3.Sum the products for all members.
For this specific truss configuration, the calculation yields mm.Continue learning with Success Tracker
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