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satishkemkar General Sponsor
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Joined: 23 Nov 2012 Posts: 38
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Posted: Wed Oct 29, 2014 6:40 am Post subject: Punching shear in flat slab |
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Dear All,
In flat slab, While calculating steel for punching shear (shear stress is greater than shear resistance capacity of concrete),
I am considering spacing of links along the perimeter of respective sections at 0.5d , d, 1.5d etc from column face . pls advice.
Satish Kemkar |
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shariffmn ...
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Joined: 12 Feb 2009 Posts: 89
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Posted: Fri Oct 31, 2014 4:50 am Post subject: |
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Dear Er. Satish,
As per SP24, Cl. 30.6.3.2, it is suggested that the spacing of stirrups should not exceed 0.75d and the punching shear should be checked at intervals of 0.75d.
You may also refer to text book on Reinforced Concrete Design by Pillai and Menon, which explains the concept and detailing of punching steel clearly.
Regards,
Shariff MN |
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satishkemkar General Sponsor
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Joined: 23 Nov 2012 Posts: 38
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Posted: Fri Oct 31, 2014 11:16 am Post subject: |
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Thanks shariff......
i have dobt that punching shear is resisted by perimeter and depth of colmn drop as concrete resisting capacity
then while calculating spacing of reinforcement , spacing os links S is considered as perpendicular to the perimeter and not along the perimeter. Why so? |
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thirumalaichettiar Silver Sponsor
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Joined: 26 Jan 2003 Posts: 3554
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Posted: Fri Oct 31, 2014 2:22 pm Post subject: |
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Dear Er.Satish Kemkar,
Did you go through the ACI 421-2R-10 Guide to Seismic design of punching shear reinforcement in flat plates?
T.RangaRajan |
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