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.
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:
6 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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