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SAP2000 RCC design yields very high reinforcement!

SAP2000 RCC design yields very high reinforcement!

SAP2000 RCC design yields very high reinforcement!

(OP)

I'm new to SAP2000 and this is my first attempt to design a residential building.
I've done following steps:

1. Defined material
2. defined sections
3. Defined area section as Shell (thick)
3. modeled beam columns as line element & slab as area element
4. Defined load patterns>Dead, Live, Quake (earthquake load to be generated automatically as per IS1893 2002)
5. Assigned wall load directly on beams.
6. Assigned Floor finish load  & live load on area (uniform to frame)
7. Meshed area 6x6
8. Assigned Diaphragm constrains by selecting joints at each floor level.

Since one of the frames is not parallel to the principal axes, Dynamic analysis was required.
9. Defined a function "is1893" as the response spectrum
10. Assigned load case Response spectrum "ResX" in u1 direction & "ResY" in u2 direction using Modal Case & function "is1893"
11. Automatically generated load combination as per Design preference IS456.

The building is barely 3 storey yet the reinforcement i got after design is waaayyy higher than in practice,(usually 1.8%)

I've attached the model below.
Any help and suggestion is highly appreciated. Thank you

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