SCIA ENGINEER: FAQ - cadsuk-rcg73ewp.stackpathdns.com

1 GLOBAL CONSTRUCTION SOFTWARE AND SERVICES 002 HOW TO CREATE NONLINEAR COMBINATIONS? SCIA engineer : FAQ Copyright Computer and Design Services Ltd Version: 002 NONLINEAR COMBINATIONS Copyright Computer and Design Services Limited How to create nonlinear combinations for a nonlinear calculation? This is possible only if you have the module run non-linear analysis. Follow the steps described below. During a linear analysis, the principle of superposition is valid. For a non-linear analysis, this principle is not valid anymore. The combinations have to be assembled before starting the calculation. In SCIA engineer , this is done by defining Nonlinear Combinations.

2 1) In the Project data, on the Functionality tab, the functionalities Nonlinearity and type of Nonlinearity have to be selected: 2) The available types for Nonlinear combinations are only Ultimate and Serviceability 3) A nonlinear calculation in Scia engineer can only be executed after nonlinear combinations have been created. This is possible via the Main menu > Load cases, combinations > Nonlinear combinations. All nonlinear combinations have as type Linear (simple). This means a considerable effort is often required to create all nonlinear combinations manually. The next steps show how to simplify this process: 002 NONLINEAR COMBINATIONS Copyright Computer and Design Services Limited 4) Open the window Combinations.

3 Suppose that 2 Code combinations have been created, EN ULS and EN SLS. Execute for both the action Explode to linear . By doing so the underlying Linear combinations are generated 5) Open the window Nonlinear combinations. Choose here for the option New from linear combinations The window Combinations opens automatically. Now all (or part of) the linear combinations can be selected. Click [Close] afterwards. The selected combinations are then automatically converted to nonlinear combinations; the content and coefficients of the linear combinations are maintained. 6) To be able to ask now the envelope result of the nonlinear combinations, Result classes have to be defined.

4 Go to the Main menu > Load cases, combinations > Result classes. Create here the classes RC NL ULS and RC NL SLS, which contain respectively the nonlinear ULS and SLS combinations 002 NONLINEAR COMBINATIONS Copyright Computer and Design Services Limited Now you can go through the results. - Result for Linear calculation (My) - Result for Non-Linear calculation (My)