The structural analysis software RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as to model solid and contact elements.
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In order to consider the support of the structure in the soil correctly, it is necessary to excavate the soil accordingly or to provide the solid with a corresponding opening.
Saving Graphic Template
Once you have assigned the concrete material and activated the design properties in the member input dialog box, the display of the reinforcement layout for the selected member is available.
In the Display Reinforcement Layout window, you can proceed as follows. 1. Use the options in the menu bar to customize the display according to your preferences. 2. This configuration can send "Directly to a printer" as a template.3. When saving the template, it is stored globally and is also available for future models.
Multi Print of Reinforcement Layout for Selected Members
Use this graphic template to print the reinforcement of any members with a similarly formatted reinforcement layout in a multi print.
In the dialog box of structural analysis settings, you can find the "Equilibrium for undeformed structure" checkbox under Options II (Image 01). If this is active, the structure is analyzed with the deformation reset to 0.
In the following, you can see an example of the result of the primary stress state determination; that is, the analysis of a soil massif subjected to its own weight. In Construction Stage 2, the "Equilibrium for undeformed structure" option is activated in the structural analysis settings, compared to Construction Stage 1 with the inactive option.The results are compared in Image 02.
It becomes clear that the stress state in the structures is the same, but when this option is activated, the deformations are reset to 0.
The specific soil material models have a variable stiffness that depends, among other things, on the prevailing stress level.
In the analysis of a single load case, this is only impressed on the structure and the soil. No stress level from other loads is taken into account, which might be necessary to obtain and use the correct soil stiffness from the soil material model.
The load case of a live load, for example, will result in different stiffnesses and thus deformations,if it is applied within a load combination on a structure that is already subjected to the soil weight as well as the structural weight and construction load,than it would result if setting it as the "first/single" load, which would be done in the analysis of the load case.
Therefore, it does not make sense to analyze the soil with the specific soil material models subjected to the individual loads / load cases if at least the always prevailing soil self-weight is not taken into account.
In the RF‑CONCRETE Members add‑on module, you can select the option to consider a precamber due to the temperature gradient under the "Fire Resistance" tab in Window "1.6 Reinforcement". For the calculation, the program internally creates a member load as the precamber of the cross-section.
However, the result beam is a virtual member without any stiffness and without considering any support, not designed to absorb loads. Therefore, an error message appears when starting the calculation if the precamber due to the temperature gradient is selected in RF‑CONCRETE Members for the design of result beams.