What is the most dominant effect on the behavior of steel I-beam whether flange width-thickness ratio (b/tf) or web depth-thickness ratio (H/tw)?

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Waiseng Tang

Dear Hazwani,

I hope the link will help

Best Regards.

http://www.steel-insdag.org/TeachingMaterial/Chapter8.pdf

Thomas Sturm

Dear Hazwani:

I would say based by my experience (in design and forensic engineering) rather than theory, that the flange width-thickness ratio (b/tf). The larger distance of the flanges to the center and the fact that they are not stiffened seems to support this, even if they have normally higher widths (but they also have higher stresses under bending).

Perhaps somebody else can help you with some bibliography.

Best regards