Slab Design by exporting from Etabs to Safe. Can anyone answer this question!

Ali.harmouch

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إنضم
13 أبريل 2009
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Salam Alaykum,
My model in Etabs is OK and I exported it to safe in order to make the slab design.
2 options had been studied:
option 1 export the slab without assigning diafragm in etabs.
option 2 export the slab after assigning diafragnm in etabs.

option 1 presented zero forces and displacement coming from wind load.
option 2 presented forces and displacement coming from wind load.

steel reinforcement in option 1 was very low than steel reinforcement in option 2 espacially the area of diafragm centre of gravity.

the steel reinforcement in option 2 seems to be very high at the centre of mass area and it seems to be not realistic. for 22 cm slab thickness, maximum soan of 5m, it gives me 20 mm steel each 7 cm.

what is the right way to do the slab design? Please advise

in addition, in the 2 options, punching shear design seems to be very high and not as per manual calculation especially with the corner columns.
Please advise.
Salam
 

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