2. MODELING

CHAPTER 2 "MODELLING" 26 4.1 Surface 2D With 2D surfaces you can model cavities and generally horizontal surfaces of any shape that do not share edges with other surfaces. 4.1.1 Grid You select the 2D surface command and successively select the sub-commands it contains. You specify the characteristics of the mesh groups you will use: • " Description ": type a name describing the group • Select " Material " and " Quality " • " Item " you select the type of item you want to place. If you select "Plate (O)n (E)lastic (F)oundation" you must enter a value of the soil index "Ks" in the corresponding field. This option is suitable for general depressions and the 'Plate' option for all other cases. In addition, the new version added the possibility of horizontal springs in pavement where the user can define a soil index, Ks,x & Ks,z. The values of horizontal springs are defined in the respective fields activated by selecting the corresponding checkbox .