Civil Engineering - GATE Exam Questions - Discussion
Discussion Forum : GATE Exam Questions - Section 3 (Q.No. 17)
17.
Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is same as that of the side of the square footing. The ratio of their ultimate bearing capcities is
Discussion:
17 comments Page 1 of 2.
Ietakshay said:
7 years ago
Given Ans 1.3 is correct.
Ratio = strength of circular section / Strength of Square section.
If We assumed Side or Dia. Is 4 cm.
And Load P is the same,
Then Ratio of ultimate stresses of circular to the square is;
= (P/12.56) / (P/16).
= P .16/P. 12.56.
= 1.3.
Ratio = strength of circular section / Strength of Square section.
If We assumed Side or Dia. Is 4 cm.
And Load P is the same,
Then Ratio of ultimate stresses of circular to the square is;
= (P/12.56) / (P/16).
= P .16/P. 12.56.
= 1.3.
Mahesh sin said:
4 years ago
Area of circular footing = π/4 d2.
= 0.785 d2.
Area of square = d2(because d=l).
Bearing capacity = load/area.
Circular = load/0.785d2.
Square. = load/d2.
Ratio = load/0.785d2*d2/load.
= 1/0.785,
= 1.27.
= 1.30.
= 0.785 d2.
Area of square = d2(because d=l).
Bearing capacity = load/area.
Circular = load/0.785d2.
Square. = load/d2.
Ratio = load/0.785d2*d2/load.
= 1/0.785,
= 1.27.
= 1.30.
Sudeep said:
10 years ago
Correct answer is 3/4.
C = 0; D = 0.
Therefore, (qf)cir/(qf)sq = 0.3yBNq/0.4yBNq.
= 3/4.
C = 0; D = 0.
Therefore, (qf)cir/(qf)sq = 0.3yBNq/0.4yBNq.
= 3/4.
Rand said:
5 years ago
What if its cohesion soil? any difference? Explain me.
Narayan Saha said:
5 years ago
The Correct answer will be option A.
Purushottam said:
6 years ago
Correct option B & D.
4/3 = 1.3.
4/3 = 1.3.
Jaydev kumar saha said:
7 years ago
Yes, agree the Correct answer is A.
Shubham said:
9 years ago
Yeah. The Correct answer is 3/4.
Tabish Faheem said:
3 years ago
Option A is the correct answer.
Mohd Tariq said:
7 years ago
The Correct answer is 3/4.
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