Civil Engineering - RCC Structures Design - Discussion
Discussion Forum : RCC Structures Design - Section 3 (Q.No. 1)
1.
If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is
Discussion:
25 comments Page 1 of 3.
Gemeda beka said:
9 years ago
Can you show me with picture?
Prasad said:
9 years ago
How it is explain?
Niranjan goenka said:
9 years ago
We know, mσcbc/σst =n/d - n [we get, m=18, σcbc = 80kg/cm2, σst=1400kg/cm2, d=46 cm]
or n = 23.32cm [putting this value].
We know, lever arm = d - n/3.
= 46 - 23.32/3.
= 38.22 cm.
I think the correct answer will be 39 cm.
or n = 23.32cm [putting this value].
We know, lever arm = d - n/3.
= 46 - 23.32/3.
= 38.22 cm.
I think the correct answer will be 39 cm.
Ankit said:
9 years ago
The correct answer is 38.22.
Aamir said:
8 years ago
I also got 38.22.
Hiren said:
8 years ago
d-n/3=46-18/3 = 46-6 =40.
Aksp said:
8 years ago
Yes, 38.23 is right.
Goutam Sinha said:
7 years ago
38.23 is right.
Pranab said:
7 years ago
Yes, 38.23 is right.
K.K.Shah said:
7 years ago
x = (m.cb.d )/cb+st.
x = 18.
z = D- x/3.
z = 40.
x = 18.
z = D- x/3.
z = 40.
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