Consideration of Construction Stages in RFEM
RF-/STAGES | Features
- Simple definition of construction stages in the RFEM/RSTAB structure including visualization
- Addition, removal, and modification of member, surface, and solid properties (such as member hinges, surface eccentricities, degrees of freedom for supports, and others)
- Optional superposition of construction stages with additional temporary loads; for example, mounting loads or mounting cranes, and others
- Consideration of nonlinear effects such as failure of a tension member, elastic foundations, or nonlinear supports
- Numerical and graphical result display for individual construction stages or as an envelope (Max/Min) of all construction stages
- Detailed printout report including all structural and load data of each construction stage
RF-/STAGES | Entering Construction Stages
After creating the entire structure in RFEM/RSTAB, 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 release definitions of members and supports.
Thus, it is possible to model structural modifications, such as those that occur when bridge girders are successively grouted or when columns are settled. The load cases and load combinations already created in RFEM/RSTAB are divided into "Permanent Loading" and "Temporary Loading" in the add-on module.
The defined temporary loads are superimposed by permanent loads. This way, it is possible to determine the maximum internal forces of different crane positions or to consider temporary mounting loads available only in one construction stage.
RF-/STAGES | Calculation
The calculation of the "Permanent Loads" is performed in compliance with the large deformation analysis successively for each construction stage.
The resulting geometry differences between the ideal and the deformed structural system from the previous construction stage are compared in the background. The next construction stage is built on top of the stressed system from the previous construction stage.
RF-/STAGES | Results and Export
After the calculation, it is possible to evaluate the results of each construction stage directly in the module window or graphically in the RFEM/RSTAB model. In this case, you can export the results to RFEM/RSTAB.
The module creates result cases of each construction stage as well as an 'envelope' combination including the maximum and minimum values of all construction stages. You can use the result cases and the enveloping combination for further calculations in various RFEM/RSTAB add-on modules.
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