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Video | 3skeng Steelwork Tool
Online Manual RFEM | Surfaces
Point-Supported Membrane
You can download this structural model to use it for training purposes or for your projects. However, we do not assume any guarantee or liability for the accuracy or completeness of the model.
The Ponding load type allows you to simulate rain actions on multi-curved surfaces, taking into account the displacements according to the large deformation analysis.
This numerical rainfall process examines the assigned surface geometry and determines which rainfall portions drain away and which rainfall portions accumulate in puddles (water pockets) on the surface. The puddle size then results in a corresponding vertical load for the structural analysis.
For example, you can use this feature in the analysis of approximately horizontal membrane roof geometries subjected to rain loading.
Go to Explanatory Video
Compared to the RF-FORM-FINDING add-on module (RFEM 5), the following new features have been added to the Form-Finding add-on for RFEM 6:
- Specification of all form-finding load boundary conditions in one load case
- Storage of form-finding results as initial state for further model analysis
- Automatic assignment of the form-finding initial state via combination wizards to all load situations of a design situation
- Additional form-finding geometry boundary conditions for members (unstressed length, maximum vertical sag, low-point vertical sag)
- Additional form-finding load boundary conditions for members (maximum force in member, minimum force in member, horizontal tension component, tension at i-end, tension at j-end, minimum tension at i-end, minimum tension at j-end)
- Material types "Fabric" and "Foil" in material library
- Parallel form-findings in one model
- Simulation of sequentially building form-finding states in connection with the Construction Stages Analysis (CSA) add-on
Once you activate the Form-Finding add-on in the Base Data, a form-finding effect is assigned to the load cases with the load case category "Prestress" in conjunction with the form-finding loads from the member, surface, and solid load catalog. This is a prestress load case. It thus mutates into a form-finding analysis for the entire model with all member, surface, and solid elements defined in it. You reach the form-finding of the relevant member and membrane elements amid the overall model by using special form-finding loads and regular load definitions. These form-finding loads describe the expected state of deformation or force after the form-finding in the elements. The regular loads describe the external loading of the entire system.
Do you know exactly how the form-finding is performed? First, the form-finding process of the load cases with the load case category "Prestress" shifts the initial mesh geometry to an optimally balanced position by means of iterative calculation loops. For this task, the program uses the Updated Reference Strategy (URS) method by Prof. Bletzinger and Prof. Ramm. This technology is characterized by equilibrium shapes that, after the calculation, comply almost exactly with the initially specified form-finding boundary conditions (sag, force, and prestress).
In addition to the pure description of the expected forces or sags on the elements to be formed, the integral approach of the URS also enables a consideration of regular forces. In the overall process, this allows, for example, for a description of the self-weight or a pneumatic pressure by means of corresponding element loads.
All these options give the calculation kernel the potential to calculate anticlastic and synclastic forms that are in an equilibrium of forces for planar or rotationally symmetric geometries. In order to be able to realistically implement both types individually or together in one environment, the calculation provide you with two ways to describe the form-finding force vectors:
- Tension method - description of the form-finding force vectors in space for planar geometries
- Projection method - description of the form-finding force vectors on a projection plane with fixation of the horizontal position for conical geometries
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Main Program
The new generation of 3D FEA software is used for the structural analysis of members, surfaces, and solids.
Add-On
The Form-Finding add-on finds the optimal shape of members subjected to axial forces and tension-loaded surface models. The shape is determined by the equilibrium between the member axial force or the membrane stress and the existing boundary conditions.
Main Program
Structural engineering software for a finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids, and contact elements
Add-On Module
Form-finding of tensile membrane and cable structures
Add-On Module
Generation of cutting patterns for tensile membrane structures
Main Program
The modern 3D structural analysis and design program is suitable for the structural and dynamic analysis of beam structures as well as the design of concrete, steel, timber, and other materials.
Add-On
The Steel Design add-on performs the ultimate and serviceability limit state design checks of steel members according to various standards.
Add-On
The Steel Design add-on performs the ultimate and serviceability limit state design checks of steel members according to various standards.
Add-On Module
Design of steel members according to Eurocode 3
Add-On Module
Design of steel members according to the American standard ANSI/AISC 360
Add-On Module
Design of steel members according to the Swiss standard SIA 263
Add-On Module
Design of steel members according to the Indian standard IS 800:2007
Add-On Module
Design of steel members according to the British standard BS 5950-1:2000 or British Annex BS EN 1993-1-1
Add-On Module
Design of steel members according to the Chinese standard GB 50017-2003
Add-On Module
Design of steel members according to the Canadian standard CSA S16
Add-On Module
Design of steel members according to the Australian standard AS 4100-1998
Add-On Module
Design of steel members according to the Mexican standard NTC-DF 2004
Add-On Module
Design of steel members according to the Russian standard SP 16.13330.2011
Add-On Module
Design of steel members according to the South African standard SANS 10162-1:2011
Add-On Module
Design of steel members according to the Brazilian standard ABNT NBR 8800:2008
Add-On Module
Design of steel members according to the Code of Practice for the Structural Use of Steel 2011 (Buildings Department – Hong Kong)
Add-On Module
Stress analysis of steel members
Add-On Module
Design of steel members according to Eurocode 3
Add-On Module
Design of steel members according to the American standard ANSI/AISC 360
Add-On Module
Design of steel members according to Swiss standard SIA 263
Add-On Module
Design of steel members according to the Indian standard IS 800:2007
Add-On Module
Design of steel members according to the British standard BS 5950-1:2000 or British Annex BS EN 1993-1-1
Add-On Module
Design of steel members according to the Chinese standard GB 50017-2003
Add-On Module
Design of steel members according to the Canadian standard CSA S16-09
Add-On Module
Design of steel members according to the Australian standard AS 4100-1998
Add-On Module
Design of steel members according to the South African standard SANS 10162-1:2011
Add-On Module
Design of steel members according to the Russian standard SP 16.13330.2011
Add-On Module
Design of steel members according to the Mexican standard NTC-DF 2004
Add-On Module
Design of steel members according to Code of Practice for the Structural Use of Steel 2011 (Buildings Department – Hong Kong)
Add-On Module
Design of steel members according to the Brazilian standard ABNT NBR 8800:2008
Add-On
The Nonlinear Material Behavior add-on allows you to consider material nonlinearities in RFEM for example, isotropic plastic, orthotropic plastic, isotropic damage).
Add-On
The Construction Stages Analysis (CSA) add-on allows for considering the construction process of structures (member, surface, and solid structures) in RFEM.
Add-On
The Time-Dependent Analysis (TDA) add-on allows you to consider the time-dependent material behavior of members. The long-term effects, such as creep, shrinkage, and aging, can influence the distribution of internal forces, depending on the structure.
Add-On
The Stress-Strain Analysis add-on performs general stress analysis by calculating the existing stresses and comparing them with the limit stresses.
Add-On
The Concrete Design add-on allows for various design checks according to international standards. You can design members, surfaces, and columns, as well as perform punching and deformation analyses.
Add-On
The Masonry Design add-on for RFEM allows you to design masonry using the finite element method. It was developed as part of the research project titled DDMaS – Digitizing the Design of Masonry Structures. The material model represents the nonlinear behavior of the brick-mortar combination in the form of macro-modeling.