Civil Engineering - Theory of Structures - Discussion

Discussion Forum : Theory of Structures - Section 3 (Q.No. 9)
The force in AC of the truss shown in the given figure, is

5t tension
4t tension
4t compression
5t compression
None of these.
Answer: Option
No answer description is available. Let's discuss.
3 comments Page 1 of 1.

Anirban Roy said:   4 years ago
There is only one horizontal force 4T acting at the top. This shall pass undiminished to the bottom as it is a pin joint frame. So horizontal reactions at A & B should be 4T each.

Respectively, But, notice that B is roller end so horizontal reaction at B=0 and free to move towards right under the action of the force. While horizontal reaction at A remains 4T towards LHS. Thus, while at A it remains fixed, but at B it moves towards the right. Thus creating an extension force on the member AB. So the member AB is under 4T tension.

Khushbu said:   4 years ago
Please, anyone can explain it?

Khushbu said:   4 years ago
Please discuss in detail.

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