I use Rhinoceros as a preprocessor for Sofistik FEA (Finite Element Method). I made my model in Rhino using the old Maillart’s papers as a Picture Frame in all viewports - Top, Front and Right one.
I’ve got little problem with my bridge arch, because it is curved in two planes. I made it as a intersection of the surface and the solid. The Surface was created from curve in right viewport by curve extrusion. The Solid was created like extrusion of the surface in top vieport. Next I intersected the surface and the solid and got my arch curved in two planes (See picture). I splitted my arch to little parts because I needed to change its properties like thickness and material attributes.
I exported my FEA model from Rhinoceros and recognized that my mesh is bad in one part of the arch. I typed DupBorder command and recognized that border contained many unnecessary control points, which I want to delete. These points influence on my mesh. How to remove them without destroying my arch surface? When I try to delete them, surface changes high