Online Manuals

Documentation for Dlubal Programs and Add-ons

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RFEM 6

The FEA software RFEM allows for modeling and structural analysis of general plate, shell, and member structures. It is also possible to analyze combined structures as well as solid elements and objects with contact properties.

This user manual describes the modeling, calculation, and result evaluation features related to the structural analysis.

RFEM 6 / RSTAB 9 | Get Started

RFEM and RSTAB are powerful programs helping structural engineers meet requirements in modern civil engineering. This short introduction will help you with the first steps and familiarize you with the most important functions of the software.

RFEM 6 | Tutorial - Structural Analysis

In this tutorial, we would like to inform you about the essential features of the RFEM program. The first part shows how to create the structural objects and loads, combine the loads, perform a structural analysis, check the results, and prepare the data for printing. The US codes are used as standards.

RFEM 6 | Tutorial - Concrete Design

In this tutorial, we would like to inform you about the essential features of the RFEM program. In the first part, a model was defined and a structural analysis was carried out. Now, the second part deals with the concrete design of slabs, walls, beams, and the column. ACI 318-19 is used as a standard.

RFEM 6 | Tutorial - Steel Design

In this tutorial, we would like to inform you about the essential features of the RFEM program. In the first part, a model was defined and a structural analysis was carried out. After performing the concrete design in the second part, the third part now deals with the design of steel members. AISC 360-16 is used as a standard.

RFEM 6 | Construction Stages Analysis

The Construction Stages Analysis (CSA) add-on allows you to consider the construction process of structures in RFEM. Structural elements can be added, removed, and modified during the construction process. The load application and the combination expressions can also be considered throughout the construction stages.

This manual describes the Construction Stages Analysis (CSA) add-on for the RFEM 6 program.

RFEM 6 / RSTAB 9 | Torsional Warping (7 DOF)

The Warping Torsion add-on (7 degrees of freedom) allows you to consider the cross-section warping as an additional degree of freedom in the global calculation of members in RFEM and RSTAB. Input and result evaluation are completely integrated in the user interface of the FEA program RFEM and the framework program RSTAB.

This manual describes the Warping Torsion add-on (7 degrees of freedom) for the programs RFEM 6 and RSTAB 9.

RFEM 6 | Form-finding

The Form Finding add-on searches for the optimal shape of members subjected to axial forces and surface models subjected to tension. The shape is determined by the equilibrium between the member axial force or the membrane stress and the existing boundary conditions.

The resulting new model shape with impressed force conditions is made available as a universally applicable initial state for further calculation of the entire structure.

RFEM 6 | Geotechnical Analysis

The Geotechnical Analysis add-on allows for a finite element analysis of soil solids with the suitable material laws in RFEM 6. By integrating Geotechnical Analysis into the FEA software, the soil-structure interaction can be represented computationally completely in the overall model.

With the Geotechnical Analysis, it is possible to determine the stresses and deformations of a soil solid. The input and result evaluation are integrated in the user interface of the RFEM 6 program.

This manual describes the Geotechnical Analysis add-on for the RFEM 6 program.

RFEM 6 / RSTAB 9 | Dynamic Analysis

A dynamic analysis can be performed in several add-ons in RFEM 6 and RSTAB 9.

The "Modal Analysis" add-on is the main add-on, which performs a natural vibration analysis for the member, surface, and solid models. It is a prerequisite for all other dynamic add-ons.

The "Response Spectrum Analysis" add-on allows for a seismic analysis using the multi-modal response spectrum analysis.

The add-ons "Harmonic Response Analysis", "Time History Analysis", and "Pushover Analysis" are still under development. You can find details about the planned content in the following chapter.

This manual describes the dynamic analysis add-ons for the RFEM 6 and RSTAB 9 programs.

RFEM 6 | Building Model

The Building Model add-on allows you to define and manipulate a building by means of stories. The stories can be adjusted in many ways. Information about the stories and also the entire model (a center of gravity) is displayed in tables and graphics.

This manual describes the Building Model add-on for the RFEM 6 program.

RFEM 6 | Stress-Strain Analysis

The Stress-Strain Analysis add-on performs a general stress analysis by calculating the existing stresses and comparing them with limit stresses. Strains for surfaces and solids can also be determined.

During the stress analysis, the maximum stresses of solids, surfaces, and line welds (RFEM only) as well as members are determined. The governing internal forces are also documented for each member and each surface. In addition, there is the option of an automatic cross-section or thickness optimization including updating of the modified cross-sections or surface thicknesses in RFEM/RSTAB.

This manual describes the Stress-Strain Analysis add-on for the programs RFEM 6 and RSTAB 9.

RFEM 6 | Multilayer Surfaces

The Multilayer Surfaces Add-on allows you to define the layer structure of any material models. In the case of orthotropic materials, the individual layers can be rotated by an angle ß, and thus it is possible to consider different stiffnesses in one direction. The add-on s is completely integrated in the user interface of the FEA program RFEM.

This manual describes the Multilayer Surfaces add-on for the RFEM 6 program.

RFEM 6 / RSTAB 9 | Concrete Design

It is possible to perform the ultimate limit state and serviceability limit state designs. Cross-section resistance, stability, and serviceability limit state designs can be performed. Input and result evaluation are completely integrated in the user interface of the FEM program RFEM and the framework program RSTAB.

This manual describes the Concrete Design add-on for the RFEM 6 and RSTAB 9 programs, whereas RSTAB 9 only allows you to perform framework design.

RFEM 6 / RSTAB 9 | Steel Design

The Steel Design add-on allows you to design steel members according to various design standards. Cross-section resistance checks, stability analyses, and serviceability limit state design checks can also be performed. The input and result evaluation are completely integrated in the user interface of the structural FEA software RFEM and the frame & truss analysis software RSTAB.

This manual describes the Steel Design add-on for the RFEM 6 and RSTAB 9 programs.

RFEM 6 / RSTAB 9 | Timber Design

The Timber Design add-on allows you to design timber members according to various design standards. Cross-section resistance checks, stability analyses, and serviceability limit state design checks can also be performed. The input and result evaluation are completely integrated in the user interface of the structural FEA software RFEM and the frame & truss analysis software RSTAB.

This manual describes the Timber Design add-on for the RFEM 6 and RSTAB 9 programs.

RFEM 6 / RSTAB 9 | Aluminum Design

The Aluminum Design add-on allows you to design aluminum members according to various design standards. Cross-section resistance, stability, and serviceability limit state designs can be performed. Input and result evaluation are completely integrated in the user interface of the FEA program RFEM and the framework program RSTAB.

This manual describes the Aluminum Design add-on for the RFEM 6 and RSTAB 9 programs.

RFEM 6 / RSTAB 9 | Webservice & API

Web service is a programmable interaction system for RFEM/RSTAB. With the help of this technology, RFEM/RSTAB provides a server service that can be reached locally or via a network. It is possible to send requests and get responses from RFEM/RSTAB with this client-server communication.

This manual describes the web service technology for the programs RFEM 6 and RSTAB 9.

RSECTION 1

The program RSECTION determines the section properties for any thin-walled and massive cross-sections and performs a stress analysis.

This user manual describes the functions for modeling, calculation, and result evaluation.

RWIND 2

RWIND 2 is a program (digital wind tunnel) for the numerical simulation of wind flows around any building geometries with determination of the wind loads on their surfaces. RWIND 2 is available as a Basic and Pro version.

RWIND 2 can be used as a stand-alone application or together with RFEM and RSTAB for a complete structural analysis and design.

Structural Analysis Example | Membrane Roofing

This manual describes the modeling of a stadium roof made of membranes in RFEM 6. Since the model consists of several segments, creating the individual segments is shown. Each segment consists of a main structure (a column, a stiffening element, cables) and a secondary structure (a membrane).

Webinar, | Model Optimization Using Artificial Intelligence (AI) in RFEM 6

This manual describes the topics of the webinar "Model Optimization Using Artificial Intelligence (AI) in RFEM 6." First, we will show you how to define global parameters. These parameters are then used in formulas to determine numerical values. Next, it is described how the defined parameters can be optimized. Finally, the procedure of estimating costs and CO2 emissions is shown.

RFEM 6 | Cutting Pattern

The Cutting Pattern add-on is still under development.

The aim is to calculate and organize cutting patterns for membrane structures. The boundary conditions of the cutting patterns on the curved geometry are determined by boundary lines and independent cutting lines. The flattening process is performed according to the minimum energy theory.

RFEM

The program RFEM allows you to enter and analyze structures, materials, and loads for planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements.

RWIND

The RWIND program is a separate application that is used externally to determine load cases and wind loads for the RFEM or RSTAB models. The software uses a numerical CFD model to apply a fluid-mechanics simulation of the flow around objects in a wind tunnel.

RF-CONCRETE Surfaces – Online Manual

The RF-CONCRETE Surfaces add-on module performs ultimate and serviceability limit state designs of reinforced concrete surfaces according to various standards. The allowable maximum and minimum reinforcement ratios for the different types of structural components and a user-defined basic reinforcement are considered as well.

The manual also describes the module extensions RF-CONCRETE Deflect and RF-CONCRETE NL

RF-/CONCRETE Members 5/8

The RF-CONCRETE add-on module allows you to perform ultimate and serviceability limit state designs of reinforced concrete members according to various standards. Optionally, you can check whether the fire resistance design according to EN 1991-1-2 is fulfilled.

The manual also describes the module extension RF-CONCRETE NL.

RF-/STEEL EC3 5/8

The add-on modules RF-STEEL EC3 (for RFEM) and STEEL EC3 (for RSTAB) can carry out all characteristic ultimate limit state, stability, deformation, and fire resistance designs for steel members according to Eurocode 3. Country-specific regulations are taken into account by various National Annexes. This manual describes the add-on modules of the two main programs, summarily called "RF-/STEEL EC3".

The manual also addresses the module extensions RF-/STEEL Warping Torsion, RF-/STEEL Plasticity, and RF-/STEEL Cold-Formed Sections.

RF-/JOINTS 5/8

The add-on modules RF-JOINTS (for RFEM) and JOINTS (for RSTAB) combine the connection modules for member elements in a single user interface. Currently, the steel categories Column Base, Pinned, Rigid, Tower, DSTV, and Sikla, as well as the timber categories Steel to Timber and Timber to Timber are implemented. This manual describes the special features of each individual add-on module.

RF-/LIMITS 5/8

The RF-/LIMITS add‑on module analyses the load bearing capacity of members, member ends, nodes, nodal supports, and surfaces by means of a defined ultimate load capacity.

The extendable library covers timber fasteners (SIGHA, Sherpa, WÜRTH, Simpson StrongTie, KNAPP) as well as steel fasteners (standardised joints in steel structures according to EC 3, M‑connect).

RF-MOVE Surfaces 5

The RF-MOVE Surfaces add‑on module for RFEM creates load cases on the basis of various positions of moving loads such as vehicles on bridges.

In addition, it is possible to create an enveloping result combination.

BIM Interfaces

Dlubal Software supports the building information modeling by means of BIM (Building Information Modeling) using the BIM interfaces with Autodesk Revit and Tekla Structures. These interfaces are integrated into RFEM and RSTAB by default.

First Steps

First Steps

Check out these tips to help you get started with the RFEM and RSTAB programs.

Structural Analysis Models to Download

Models to Download

Select numerous structural models to utilize them for training purposes or for your projects.

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RFEM 6
Hall with Arched Roof

Main Program

RFEM 6 structural analysis software is the basis of a modular software system. The main RFEM 6 program 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.

Price of First License
3,990.00 USD
RFEM 5
RFEM

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 5
RF-CONCRETE

Add-on Module

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

Price of First License
810.00 USD
RFEM 5
RF-STEEL

Add-on Module

Stress analysis of steel surfaces and members

Price of First License
1,030.00 USD
RFEM 5
RF-STEEL EC3

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RFEM 5
RF-LIMITS

Add-on Module

Comparison of results with defined limit values

Price of First License
580.00 USD
RFEM 5
RF-MOVE

Add-on Module

Generation of load cases from moving loads for members and sets of members

Price of First License
450.00 USD
RFEM 5
RF -JOINTS Steel - DSTV

Add-on Module

Design of standardised joints in steel structures according to the EN 1993-1-8 - DSTV guideline

Price of First License
670.00 USD
RFEM 5
RF-JOINTS Steel - Pinned

Add-on Module

Design of pinned connections according to Eurocode 3

Price of First License
670.00 USD
RFEM 5
RF-JOINTS Steel - Rigid

Add-on Module

Design of rigid connections according to Eurocode 3

Price of First License
1,030.00 USD
RFEM 5
RF-/JOINTS Steel - Column Base

Add-on Module

Design of hinged and restrained column base footings according to Eurocode 3

Price of First License
670.00 USD
RFEM 5
RF-JOINTS Steel - Tower

Add-on Module

Design of nominally pinned bolted connections of members used in lattice towers according to Eurocode 3

Price of First License
670.00 USD
RF-JOINTS Steel - SIKLA

Add-on Module

Design of SIKLA joints according to GX K14-6005-3

Price of First License
1,120.00 USD
RFEM 5
RF -JOINTS Timber - Steel to Timber

Add-on Module

Design of indirect timber connections with dowel-type fasteners and steel plates according to NDS and Eurocode 5

Price of First License
850.00 USD
RFEM 5
RFEM-/RSTAB RF-/JOINTS Timber - Timber to Timber Add-on Module

Add-on Module

Design of Direct Timber Connections According to Eurocode 5

Price of First License
360.00 USD