Civil Engineering - RCC Structures Design - Discussion
Discussion Forum : RCC Structures Design - Section 1 (Q.No. 18)
18.
Dimensions of a beam need be changed if the shear stress is more than
Discussion:
31 comments Page 1 of 4.
Geetesh said:
5 years ago
The dimension of beam should be changed or the beam has to be redesigned if the value of maximum Shear stress (say tau max) Exceeds 20kg/cm square.
This is the limiting value or max. Val of (tau max) for RC Beam.
This is the limiting value or max. Val of (tau max) for RC Beam.
(1)
Vikram said:
5 years ago
The method is not specified so assume wsm.
Grade not specified so assume m20( because it is the minimum grade for RCC structure)
So the answer is 1.9n/mm2.
Grade not specified so assume m20( because it is the minimum grade for RCC structure)
So the answer is 1.9n/mm2.
Ramendra Singh said:
5 years ago
Tv = 20kg/cm^2 convert in N/mm^2, therefore, multiply by it 10^-1 and then convert into L.S.M by multiplying 1.5 =(2*1.5=3).
Tcmax = for M20 we take because minimum we take, therefore, Tcmax=2.8
Tv>Tcmax therefore redesign the section.
Tcmax = for M20 we take because minimum we take, therefore, Tcmax=2.8
Tv>Tcmax therefore redesign the section.
(3)
Engr Omid said:
6 years ago
If 5 kg/sq cm then no need of bars.
If 5-20 kg/sq cm then use steel bars
If more than 20 kg/sq cm then change the section dimension.
If 5-20 kg/sq cm then use steel bars
If more than 20 kg/sq cm then change the section dimension.
(4)
Kamal lochan parida said:
6 years ago
Fck means the characteristic value of concrete. Which expressed in N/square mm.
(1)
Amjid Ali said:
6 years ago
What is meant by (fck)? anyone tell me.
Avijit said:
6 years ago
Use the formula. Ï„ max = 0.625 * √(fck).
(1)
NITEESH patel said:
6 years ago
M 40 τ max.=2.5 N/mm^2.
M 30 τ max. =2.2 N/mm^2,
M 15 τ max.= 1.6N/mm^2,
Ans =(D)= 2.5N/mm^2.
M 30 τ max. =2.2 N/mm^2,
M 15 τ max.= 1.6N/mm^2,
Ans =(D)= 2.5N/mm^2.
(1)
BISWAJIT said:
7 years ago
Here it is mentioned the term beam which is a reinforced concrete. Also as IS-466, for reinforced concrete minimum grade of concrete shall be M20.
Hence, by considering this situation, the Tau Max shall be not more than 25 kg/sqcm.
Hence, by considering this situation, the Tau Max shall be not more than 25 kg/sqcm.
Rehan said:
7 years ago
The section is revised if shear stress is more than 0.4fc or 2 Mpa,and 2 Mpa is equal to 20kgper cm2.
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