Why do I need the RF‑CONCRETE NL add‑on module for the stability design in RF‑CONCRETE Members? EC 2, Section 5.8.6, only speaks about geometric nonlinearity.

Answer

For the stability design of compression elements, you need the combination of RF‑CONCRETE Members and RF‑CONCRETE NL. The reason is the following:

First, the internal forces of the individual load combinations (second-order analysis + imperfection) are subjected to the linear-elastic calculation. For this, you basically only need RFEM.

Then, the cross-section design is performed in RF-CONCRETE Members with these internal forces determined linearly-elastically, and the required bending reinforcement is determined from these internal forces.

This bending reinforcement is then compared with the user-defined entries concerning the existing basic reinforcement or the minimum reinforcement and based on this, the reinforcement concept is generated (dialog box '3.1 Existing Longitudinal Reinforcement' of the module).

This existing longitudinal reinforcement is then used for the nonlinear design.

According to Section 5.8.6 (1), geometric nonlinearities must be taken into account according to the second-order analysis. However, the general rules for nonlinear methods according to 5.7 also apply.

In Sec. 5.7(1), 'an adequate non-linear behaviour for materials is assumed'. According to 5.7(4)P, the use of material characteristics which represent the stiffness in a realistic way but take account of the uncertainties of failure shall be used when using non-linear analysis.

This requires the RF-CONCRETE NL add-on module. Thus, the geometric and material nonlinearities are considered and the requirements of EC 2 regarding the ultimate limit state design are fulfilled.

Similarly, this method is also available in RSTAB in the CONCRETE add-on module.

Keywords

members compression general method nonlinearity stability design

Contact us

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

+49 9673 9203 0

info@dlubal.com

Soil-Structure Interaction in RFEM

Soil-Structure Interaction in RFEM

Webinar 27 October 2020 2:00 PM - 2:45 PM CET

RFEM for Students

Online Training 10 November 2020 10:00 AM - 1:00 PM EDT

Online Training | English

RFEM | Timber Basics

Online Training 18 November 2020 1:00 PM - 4:00 PM EDT

Stability Design in Steel Construction with RFEM and RSTAB

Stability Design in Steel Construction with RFEM and RSTAB

Webinar 1 December 2020 2:00 PM - 2:45 PM CET

Training in Leipzig | English

Training in Leipzig | RSTAB | Basics

Training 2 December 2020 9:00 AM - 4:30 PM CET

Training in Leipzig | English

Training in Leipzig | RFEM | Basics

Training 3 December 2020 9:00 AM - 4:30 PM CET

Online Training | English

RFEM | Steel Basics

Online Training 8 December 2020 9:00 AM - 12:00 PM EDT

NBC 2015 Modal Response Spectrum Analysis in RFEM

Webinar 30 September 2020 2:00 PM - 3:00 PM EDT

Documenting Results in the RFEM Printout Report

Documenting Results in the RFEM Printout Report

Webinar 25 August 2020 2:00 PM - 2:45 PM CEST

ACI 318-19 Concrete Design in RFEM

Webinar 20 August 2020 2:00 PM - 3:00 PM EDT

How to Be More Productive Using RFEM

How to Be More Productive Using RFEM

Webinar 7 July 2020 3:00 PM - 4:00 PM CEST

Introduction to Solid Modeling \n in RFEM

Introduction to Solid Modeling in RFEM

Webinar 30 June 2020 2:00 PM - 3:00 PM EDT

Modeling with Solids in RFEM

Modeling with Solids in RFEM

Webinar 9 June 2020 3:00 PM - 3:45 PM CEST

CSA A23.3 Concrete Design in RFEM

CSA A23.3:19 Concrete Design in RFEM

Webinar 14 May 2020 2:00 PM - 3:00 PM EDT

Programmable COM Interface for RFEM/RSTAB

Programmable COM Interface for RFEM/RSTAB

Webinar 12 May 2020 3:00 PM - 3:45 PM CEST

Designing Cold-Formed Steel Sections According to Eurocode 3

Designing Cold-Formed Steel Sections According to Eurocode 3

Webinar 30 April 2020 3:00 PM - 3:45 PM CEST

RSTAB Concrete Structures
CONCRETE 8.xx

Add-on Module

Linear and nonlinear analysis of reinforced concrete members with reinforcement concept

Price of First License
810.00 USD
RSTAB Main Program
RSTAB 2D 8.xx

Main Program

Structural Frame & Truss Analysis Software

Price of First License
1,300.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD
RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM Concrete Structures
RF-CONCRETE NL 5.xx

Add-on Module

Physical and geometrical nonlinear calculation of beam and plate structures consisting of reinforced concrete

Price of First License
1,300.00 USD
RFEM Concrete Structures
RF-CONCRETE 5.xx

Add-on Module

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

Price of First License
810.00 USD