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Civil Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 1 (Q.No. 30)
Strength of Materials
30.
The force in member U2L2 of the truss shown in below figure, is
10 T tension
10 T compression
zero
15 T compression.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.
Raghu said:   1 decade ago
Force acting towards the joint in a tress will exert compressive force.
DHAWAL KALRA said:   1 decade ago
Hey guys as truss members do not have any bending moment criteria. So in this question it can't be tensile as it will generate b.m.
Denzil said:   9 years ago
As per my knowledge, It should be 5T compression. I evaluated it by using the method of joints working from a joint with the zero-force member.
Pawan joshi said:   8 years ago
It's 5T compression by the method of section.
Roop Kumar said:   8 years ago
You are exactly correct @Pawan Joshi.
Mahesh said:   8 years ago
Can anyone give a correct explanation?
Ramya said:   8 years ago
Give the correct explanation, please.
Ebeyehu said:   8 years ago
As my perception the answer will be 20t tension.
Kallan said:   8 years ago
Support reaction = 15 T.

Take a section passing through U1U2, U2L2, L2L3. And Consider right section.

Now within the section, vertical forces are 10 T at U2, Force of U2L2 at U2, 10 T at last end and 15 T from support. Assume force of U2L2 downward.

Now take summation V = 0.

10 + F + 10 -15 = 0.

F = - 5. -ve indicates assumption is wrong, it is acting upwards i.e. towards the joint. So it is compressive.

So, the answer is 5 T compression.
Shees said:   8 years ago
Yes, it is 5T compression.
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