How can the deformation behavior of mixed reinforced concrete structures (members and surfaces) be modeled in state II?

Answer

Using the modules RF-CONCRETE Members and RF-CONCRETE Surfaces, it is possible to carry out the design in state II (non-linear design) separately for members and surfaces. To do this, it is necessary to have the RFEM Add-on module RF-CONCRETE NL.

After having performed a calculation in state II (for the serviceability limit state, with nonlinear design) in RF-CONCRETE Members or RF-CONCRETE Surfaces, you can export the resulting nonlinear stiffness to RFEM. This nonlinear stiffness concerning the member design or the surface design can optionally be used for the calculation of the internal forces on individual load cases or load combinations.

The procedure described above is possible to carry out a separate design of members and surfaces. Unfortunately, this is not exact with a mixing system consisting of members and surfaces, since there is no interaction between the two modules RF-CONCRETE Members and RF-CONCRETE Surfaces. In this case, however, it is possible to display the members as a surface model, and also use these equivalent surfaces (for the members) to carry out the design in RF-CONCRETE Surfaces. This 'Equivalent Model' helps you to determine the deformations in state II. For this purpose, either the RF-CONCRETE NL (non-linear design) or the add-on module RF-CONCRETE Deflect (analytical method) can be applied.

Keywords

CONCRETE NL CONCRETE Deflect State II Mixed structures Mixed system RF-CONCRETE Surfaces RF-CONCRETE Members Deformation Cracked SLS Serviceability

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RFEM Concrete Structures
RF-CONCRETE 5.xx

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

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