I have a mat which has different thickness at different locations. How can I model that ?
This can be done by creating control regions. You can define as many control regions within your mat boundary as you wish. Boundary represents your entire mat and it can have holes or control regions within it. Control region is a region within the mat ( or boundary ) that may have different properties than the rest of the mat. For example a control region can have a different thickness or a different soil property associated with it. Holes are used for defining openings within the mat ( or boundary ).
One you define a boundary for your mat, please follow the steps listed next to define the control region
Once the control regions are defined, go to Analysis Properties > Slab thickness and assign the required thickness to the boundary or the control regions.