REG : WEAK AXIS SHEAR AREA OF I SECTION
REG : WEAK AXIS SHEAR AREA OF I SECTION
(OP)
Dear Sir/Madam,
In sacs, I have checked the Major axis shear area of " i section " while reviewing the member in postvue, I came to know software is taking only 2/3 of the Two flange areas.
But as per AISC, it should take 2 x flange areas.
If anybody answer to my question means, it will helpful to me.
Thanks.
In sacs, I have checked the Major axis shear area of " i section " while reviewing the member in postvue, I came to know software is taking only 2/3 of the Two flange areas.
But as per AISC, it should take 2 x flange areas.
If anybody answer to my question means, it will helpful to me.
Thanks.






RE: REG : WEAK AXIS SHEAR AREA OF I SECTION
Essentially, AISC forces you to wipe the dust off your mechanics of materials textbook and return to first principals. So, for the pair of rectangles that you would have with shear along the weak axis, we know that the maximum stress is 1.5 times the average stress. Another way to account for this is for your software to work with average stress on an effective shear area of 2/3 A.
RE: REG : WEAK AXIS SHEAR AREA OF I SECTION
That may be a conservative approach by the software developer, but I don't believe that's consistent with AISC.
AISC allows you to take the full web area for shear, so I don't believe that weak axis shear with the flanges would be any different.
padeye-
This seems like a completely academic exercise. Shear rarely controls strong-axis sizing of a beam, I am hard pressed to think of any scenario (outside of the most unique loading condition) in which is would control weak axis sizing of a beam.
RE: REG : WEAK AXIS SHEAR AREA OF I SECTION
RE: REG : WEAK AXIS SHEAR AREA OF I SECTION
VQ/(It) for a WF is about 15% higher than V/Aweb. I think that the two flanges become the webs for the shear equation.
I'm not disagreeing from a mechanics standpoint, but as far as AISC is concerned that is what I would do with the design equations. Again, I think this is academic as shear rarely controls for strong axis and will almost never control for weak axis.
RE: REG : WEAK AXIS SHEAR AREA OF I SECTION
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.