GATE CE 2016 Set 1 — Question 43
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Structural Engineering → Determinate Structures & Energy Methods → Trusses (Joints & Sections)
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Question
A plane truss with applied loads is shown in the figure.
The members which do not carry any force are

Correct answer
(A) FT, TG, HU, MP, PL
Solution
We identify zero-force members using standard truss analysis rules:
1.Joint F: Members EF and FG are collinear. Member FT is non-collinear, and there is no external load at joint F. Therefore, .
2.Joint T: Members ET and TS are collinear. Members TF and TG are non-collinear. Since and there is no external load at joint T, the vertical component of must be zero, implying .
3.Joint H: Members GH and HJ are collinear. Member HU is non-collinear, and there is no external load at joint H. Therefore, .
4.Joint M: Members LM and MN are collinear. Member MP is non-collinear, and there is no external load at joint M. Therefore, .
5.Joint P: Members NP and PQ are collinear. Members PM and PL are non-collinear. Since and there is no external load at joint P, the vertical component of must be zero, implying .
Thus, the zero-force members are FT, TG, HU, MP, and PL.Continue learning with Success Tracker
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