How i can model masonry infill as a equivalent diagonal strut in SAP2000. I have to go for No-Linear Time History Analysis. Which type of element will be used for diagonal strut modeling representing the masonry infill behavior. Simple diagonal beam element with axial hinge at center ? Or using Link Element with GAP properties ? Kindly share the complete procedure for modeling equivalent diagonal strut in SAP2000 with openings (Doors and Windows)