Civil Engineering - Theory of Structures - Discussion

17. 

The force in BF of the truss shown in given figure, is

[A]. 4t tension
[B]. 4t compression
[C]. 4.5t tension
[D]. 4.5t compression
[E]. zero.

Answer: Option D

Explanation:

No answer description available for this question.

Patel said: (Aug 17, 2013)  
Reactions are va+ab = 5t.

Moment at A= 4t*x+5t*x-vb*2x = 0.

So 9t = 2vb.

vb = 4.5t.

So force in compression member BF = 4.5t compression.

P.K. Nayak said: (Jul 29, 2016)  
Taking moment about A.

Vb * 2 = 5 * 1 + 4 * 1.
=> Vb = 4.5T Upward.

Considering joint B
Fbc = 0 & Fbf = 4.5T c.

Krunal said: (Apr 15, 2017)  
How to determine it as compression or tension?

Manoj Paridwal said: (Sep 11, 2017)  
Is sign is - then compression?

If sign positive then tension.

Abhi said: (Aug 21, 2018)  
How to consider the length of this? Please explain me in detail.

Nath said: (Oct 2, 2018)  
Here, Assume x as the length of each segment.

Gajanan Todeti said: (Sep 19, 2019)  
Answer is A) 4T tension.

Michael said: (Apr 20, 2021)  
Why zero can't be? Explain, please.

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