Hi Shiv,

Please watch the tutorial below on youtube that might help you:

https://www.youtube.com/watch?v=CzqZVDse-eI

 Thanku sir, but i've already seen this tutorial.Actually i want to perform analysis considering SHEAR WALL in G+7 building. 

I think the only way is to model your slab as shell elements specified as a rigid diaphragm and model the shear walls as shell elements in one file and as frame elements in another file. Perform two linear analysis and if they get more or less the same deflections then you could use the file where you modeled the walls as frame elements and perform the pushover analysis.

I think you will need to model the shear wall as Shell element and define the non-linear behavior of the Shell element.  Hope it helps.

Model the shear wall as a shell-layerd element .. specify the reinforcement and nonlinearity when defining the section as shell-layerd. Watch how to define shear wall as a shell- layered here:

https://m.youtube.com/watch?v=Y7z6IYxF-eQ