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thirumalaichettiar
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Joined: 26 Jan 2003
Posts: 3459
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 Posted: Sun Sep 17, 2017 5:06 am Post subject: |
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Dear Sefians,
Please refer for UPSTAND BEAM flange width in the experts Er.T.Rangarajan Forum for clarification and details. |
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spsvasan
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Joined: 18 Dec 2008
Posts: 295
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| Posted: Thu Oct 19, 2017 4:38 am Post subject: |
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| thirumalaichettiar wrote: | Dear Sefians,
Please refer for UPSTAND BEAM flange width in the experts Er.T.Rangarajan Forum for clarification and details. |
Dear Er.Rangarajan
Thank you for your posting in the Experts forum
I think upstand beam with compression flange occurs in the case of cantilever beams with sunk slab [typically in porticos] and in the case of sunk slab near supports.
I understand that the reduction in flange width, in comparison with normal T beam flange width at midspan, is due to shear lag effect, caused by high shear force.
High shear force can occur near midspan also, when large secondary beams frame into a main beam. Here also high bending moment is accompanied with high shear forces.
Will it not be prudent to adopt the lower value of flange width in such cases [heavy points near midspan] also?
S.P.Srinivasan |
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