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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.
Amit Shinde said:   2 years ago
@All.

The force in U2L2 is 5T which behaves as a compression member.
Kiran said:   5 years ago
Answer is 15T because there is already 10T and resolved force is 5; reaction=15T, SF at U2= 10+10-15= 5T, resolved force 5T+ already in member 10T = 15T.
Santu said:   5 years ago
10T Compression is the correct answer. I too agree.
Muhammad zeeshan khan said:   7 years ago
Yes, it is 5 T compression by the method of joint.
Roop Kumar said:   7 years ago
Yes, it is 5T compression.
Koirala said:   7 years ago
It can't be 10t because load is share by U2L3 component also. If the inclined portion joins L2U3 instead of U2L3 then it will be 10T.
Shees said:   8 years ago
Yes, it is 5T compression.
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.
Ebeyehu said:   8 years ago
As my perception the answer will be 20t tension.
Ramya said:   8 years ago
Give the correct explanation, please.
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