By Frank Sonntag, Dlubal Engineering Software

The parameterized input provides the engineer with a tool to enhance effectiveness. It makes it possible to enter model and load data in such a manner that they depend on particular variables. Those parameters (e.g. length, width, live load etc.) are stored in a list of parameters and can be used in formulas to determine a numerical value. The formulas are handled by the formula editor of RSTAB or RFEM. If a parameter is modified on the parameter list, the numerical values of all formulas that use this parameter are updated. The contingent geometry of the model or the loads are adapted automatically.

If you model e.g. an L section that is connected with an eccentricity to a beam, you have to determine the centroidal distances each time when you optimize this section in order to adjust the eccentricity. This can be automated by applying the formula “GetCSPar(CrossSection(1);”e_y”)” in column E of the list of parameters. The value is the determined automatically from the section data of the specific cross-section.