I recently purchased RSTAB with the CONCRETE add-on module. Can I use it to perform the stability analysis of reinforced concrete columns?
Answer
Yes, you can, because the nonlinear reinforced concrete design is also included in the CONCRETE add-on module for RSTAB 8. Thus, you can activate "Nonlinear calculation" in the "Ultimate Limit State" tab.
Figure 01 - Dialog Box "General Data" in CONCRETE
In the detail settings for the nonlinear calculation, you can select "General design method for members in axial compression acc. to second order theory."
Figure 02 - Dialog box "Settings for Nonlinear Calculation": General Method for Compression Elements
In this case, it is important to define the imperfections in RSTAB and apply load combinations (CO) according to the second-order analysis, no result combinations (RC), for the design!
Note to RFEM 5:
In RFEM 5, the same procedure is possible in RF‑CONCRETE Members. However, RFEM requires the RF‑CONCRETE NL add-on module for the nonlinear reinforced concrete design.
Keywords
Stability Reinforced concrete Column Concrete Model column method Compression members General method Compression element
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Frequently Asked Questions (FAQ)
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- How can I create a curved or arched section?
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If I do not specify any basic reinforcement in RF‑CONCRETE Surfaces, I obtain the value X as an additionally required reinforcement. If I enter this value X as the provided basic reinforcement, I correctly do not get any additional required reinforcement.
However, if I enter a lower value than the determined required total reinforcement as the basic reinforcement, the additionally required reinforcement is increased in such a way that the originally required reinforcement content is exceeded. Why? - Why does the RF‑CONCRETE Surfaces add-on module not increase the amount of reinforcement until the SLS designs have a design ratio of 1.0?
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