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 2 of 4.
Akshay said:
7 years ago
As per IS 456-1978 section is redesigned if shear stress is greater than 20 kg/cm2 or 2N/mm2.
So, the Given answer is correct.
So, the Given answer is correct.
Ajay kumar said:
7 years ago
Max shear stress of concrete= 0.63 under root fck.
So, for M15 concert it should be;
0.63 x under root 15 = 2.5 N/mm^2.
So, for M15 concert it should be;
0.63 x under root 15 = 2.5 N/mm^2.
Rkrana said:
7 years ago
For beam, slab, column m15 grade is used and Max shear stress for m15 grade of concrete is 25kg/cm2.
So option C is right.
So option C is right.
(1)
Ghalib said:
7 years ago
Yes, Agree @Sourab Sharma.
Actually it is .63√(fck). So for higher grades, it will be the max.
Actually it is .63√(fck). So for higher grades, it will be the max.
Abhishek said:
7 years ago
Method is not specified so lets say WSM,
Grade is not specified so lets say M15.
Max permissible shear stress for M15 under WSM is 1.6 N/mm^2 .
so all options are wrong.
Grade is not specified so lets say M15.
Max permissible shear stress for M15 under WSM is 1.6 N/mm^2 .
so all options are wrong.
Dhruba said:
8 years ago
From IS 456:2000 table 20.
We have, for Concrete grade M40 and above, maximum shear stress is 4 N/mm^2.
Also from clause 40.2.3.1, we get to know that for solid slabs nominal shear stress should not exceed half the appropriate values given in Table.20. So, taking the maximum value of shear stress i.e.for M40 and above ----> 4 N/mm^2.
We will obtain its half value to be 2 N/mm^2 (or 20kg/cm^2).
We have, for Concrete grade M40 and above, maximum shear stress is 4 N/mm^2.
Also from clause 40.2.3.1, we get to know that for solid slabs nominal shear stress should not exceed half the appropriate values given in Table.20. So, taking the maximum value of shear stress i.e.for M40 and above ----> 4 N/mm^2.
We will obtain its half value to be 2 N/mm^2 (or 20kg/cm^2).
Sourab sharma said:
8 years ago
Maximum shear stress = 0.63(fck)^(1/2).
For M10 grade of concrete = 1.999 n/mm^2.
For M10 grade of concrete = 1.999 n/mm^2.
Shridhar rai said:
8 years ago
Acc to clause 40.2.3.1 for solid slabs nominal shear stress should not exceed half of the value of maximum shear stress i.e. (0.5*4)N/mm2 =2 N/mm2.
Arya. said:
8 years ago
Shear stress value is more 1.8 N/mm2.
Then beam is redesign.
Then beam is redesign.
SAMIRAN MONDAL said:
8 years ago
FOR, M-15 SHEAR STRESS 2.8N/MM2.
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