SAP2000 & shear wall

Why not model it with area finite elements? If you feel you need to model a shear wall as an equivalent column using frame element, then define/add a concrete rectangular section with the properties of your shear wall, or a portion of the shear wall. Define a 8" thick by 15 ft wide rectangle, for example. Modeling with frame elements, you will have to assign joint constraints to the actual wall connection, since you are using centerline frames and need to account for the offset distances.

Don't use equivalent column for shear wall. Sometimes it will give you wrong results in stress. A better way is to use shell element for shear wall. If it's a steel shear wall, you can manually check the stress and strain status of the shear wall. If it's concrete, then you can run section cut to integrate the internal forces of the wall