To obtain the moment and shear force from a wall modeled as shell elements in ETABS, you can follow these steps:

Another method to model the structural walls in ETABS is to use solid elements, such as 3D solid or plate elements, which can provide more accurate results compared to shell elements. You can also consider using a combination of both shell and solid elements to represent the wall and obtain results.

It is important to note that the choice of modeling technique and element type will depend on the complexity of the wall geometry and loading conditions, as well as the desired level of accuracy in the results. It is always recommended to consult with a professional engineer or an ETABS expert for guidance on the best modeling approach for your specific problem.

To show the results in shear walls, you first need to assign them to Piers:

1. You need to define your Piers (Define/Pier Labels...)

2. You can assign each wall to its corresponding Pier. You can assign multiple shell elements to the same Pier, such as a C wall, depending on the results you want.

3. You can then extract the moment and shear of each wall or group of wall.

The output is a single value in each DOF for the whole Pier, even if you define multiple shell elements to a same pier label. The results are given for each Pier and each Storey (top and bottom), so you don't have to define a different pier for each storey.

Some info on pier labeling: https://wiki.csiamerica.com/display/etabs/Pier+and+Spandrel+Labeling+and+Design

Cheers,