Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion
Discussion Forum : Soil Mechanics and Foundation Engineering - Section 2 (Q.No. 14)
14.
If L and B are the length and breadth of a footing, e the eccentricity along the length and P and Q are the axial force and bearing capacity of the soil, then, to avoid tension,
Discussion:
12 comments Page 1 of 2.
KRISHNA said:
6 years ago
I agree @Sarang.
In option C, If e is too large tension will develop on the footing. Therefore A is the answer. No chance of tension development.
We get two equations when we write stress balancing equation under the footing. One is A and the other is C.
So, the answer is A.
In option C, If e is too large tension will develop on the footing. Therefore A is the answer. No chance of tension development.
We get two equations when we write stress balancing equation under the footing. One is A and the other is C.
So, the answer is A.
(1)
Kiran said:
4 years ago
Bearing capacity of soil= Axial stress + Bending Stress.
Q = P/A + M/Z.
Where, M= Moment = P * e.
Z= Section Modulus = BL^2/6 [For rectangular footing].
Therefore, Q = P/(BL) + Pe/(BL^2/6),
Q = P/(BL) + 6Pe/(BL^2),
Q = P/(BL)* [1+6e/L],
BL = P/Q*[1+6e/L].
Q = P/A + M/Z.
Where, M= Moment = P * e.
Z= Section Modulus = BL^2/6 [For rectangular footing].
Therefore, Q = P/(BL) + Pe/(BL^2/6),
Q = P/(BL) + 6Pe/(BL^2),
Q = P/(BL)* [1+6e/L],
BL = P/Q*[1+6e/L].
(5)
Pavan said:
4 years ago
It should be B. From the point of unit conversion, it should give the units of the same on both sides.
As per conversion, it should option B. My analysis is subjected to correction.
As per conversion, it should option B. My analysis is subjected to correction.
Sarang said:
6 years ago
To avoid tension reaction should be compressive all along with the structure so options A becomes rational.
Sandeep mourya said:
6 years ago
All of the above given options are wrong.
The answer should be
BL = P/Q(1-6e/L)
The answer should be
BL = P/Q(1-6e/L)
(1)
KRISHAN said:
8 years ago
Maximum option A and Minimum eccentricity option C.
Vivek said:
10 years ago
How to avoid tension P/BL = 6Pe/BL^2?
Rahul said:
7 years ago
How this is possible? Please explain.
Tanmoy Karmakar said:
4 years ago
Thanks for the explanation @Kiran.
Garry said:
8 years ago
I think the answer should be C.
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