Hello,

I am trying to model low rise wall behavior, matching monotonic and cyclic analyses to cyclic experimental data up to peak load.

To do so, I am looking into using different material models if different regions of the wall. Specifically, near the wall to foundation interface, I would like to make the first row of elements concrete with very low tension strength, to capture the interface opening that was observed, without incorporating the complexities of an interface model. What I would like to to do is assign this different concrete model to the first "row" of elements above the interface. Is there a way to tell a subsection of elements within a macroelement to have different concrete properties?

I have also tried to do this by creating two macroelements, but have had issues with the automatic meshing creating two rows of elements, which have poor aspect ratio, instead of just one. Is there a way to have better control over this mesh definition in ATENA 2D? Other than just element size and smooth element shapes?

Thanks