Civil Engineering - Steel Structure Design - Discussion
Discussion Forum : Steel Structure Design - Section 1 (Q.No. 37)
37.
A second horizontal stiffener is always placed at the neutral axis of the girder if the thickness of the web is less than
Discussion:
12 comments Page 2 of 2.
ALEEM IQBAL said:
1 year ago
If d/tw≤85.
No stiffeners are required.
If 85≤d/tw≤200.
Vertical stiffeners are required.
If 200≤d/tw≤250
The Vertical stiffener and one horizontal stiffener is provided at a distance of 2/5 from the compression flange to the neutral
If 250≤d/tw≤400.
Plus one horizontal stiffener at neutral.
At support and concentrated load.
Bearing stiffeners are provided under concentrated load to avoid local bending of the flange as well as local buckling of the web.
No stiffeners are required.
If 85≤d/tw≤200.
Vertical stiffeners are required.
If 200≤d/tw≤250
The Vertical stiffener and one horizontal stiffener is provided at a distance of 2/5 from the compression flange to the neutral
If 250≤d/tw≤400.
Plus one horizontal stiffener at neutral.
At support and concentrated load.
Bearing stiffeners are provided under concentrated load to avoid local bending of the flange as well as local buckling of the web.
Khan said:
3 weeks ago
D/t < 85εw: No stiffeners needed (unstiffened).
85εw < d/t < 200εw: Vertical stiffeners may suffice.
200εw < d/t < 250εw: Vertical + one horizontal stiffener (often at 0. 2d from compression flange).
D/t > 250εw: Requires vertical stiffeners plus an additional horizontal stiffener at the neutral axis.
So, option D is correct.
85εw < d/t < 200εw: Vertical stiffeners may suffice.
200εw < d/t < 250εw: Vertical + one horizontal stiffener (often at 0. 2d from compression flange).
D/t > 250εw: Requires vertical stiffeners plus an additional horizontal stiffener at the neutral axis.
So, option D is correct.
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