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Construction Stages for RFEM Structures
Entering Construction Stages
After having created the entire structure in RFEM, the individual structural components as well as load cases and combinations are assigned to the corresponding construction stages. For each construction stage, you can modify for example the release definitions of members and supports. In this way, you can model system changes, as they occur by successive grouting of bridge girders or by settling of columns. The load cases and combinations created in RFEM are assigned to "Permanent Loads" and "Temporary Loads". Results from temporary loads (or envelopes of several temporary load cases) are added to the results of permanent loads. In this way, it is possible to add the max/min internal forces of different crane positions or temporary mounting loads to the construction stage.
The calculation of the "Permanent Loads" is done by a large deformation analysis step-by-step for each construction stage. Differences in geometry between the ideal system and the deformed system from the previous construction stage are compensated internally. The next construction stage is based on the stressed system from the previous construction stage.
Results and Export
After the calculation, the results of each construction stage are listed in a table. They can be exported to RFEM and then also viewed graphically.
This way, a number of result cases for each construction stage exists. In addition, an evelope that includes the maximum and minimum values of all construction stages is created.
The results can be used for the design in various RFEM modules.