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Structural Engineering Software for Pneumatic Structures
Structural engineering FEA software RFEM is the basis of a modular software system. RFEM is used to define structures, materials, and loads for planar and spatial structural systems consisting of plates, walls, shells and members. The program also allows you to create combined structures as well as model solid and contact elements.
The RWIND Simulation stand-alone program is recommended for complex structures. This program simulates wind flows around any structures by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
RF‑FORM‑FINDING searches for shapes of structures subjected to tension or compression, such as membrane and cable structures. The shape is calculated by the equilibrium between the surface stress (specified prestress and additional load such as self‑weight, pressure, etc.) and the given boundary requirements. The prestressed model is afterwards used as the initial state for all subsequent calculations.
RF‑CUTTING‑PATTERN generates and organizes cutting patterns for membrane structures. Boundary conditions of the cutting patterns on curved geometry are determined by boundary lines and independent planar cutting lines or geodesic cutting lines. The flattening process is performed according to the minimum energy theory.
The RF-MAT NL add-on module allows for consideration of nonlinear material behavior in RFEM.
It offers the option to couple surfaces with the stiffness types "Membrane" and "Membrane-Orthotropic" with the material models "Isotropic nonlinear elastic 2D/3D" and "Isotropic plastic 2D/3D" (RF-MAT-NL add-on module required). This functionality enables the simulation of the nonlinear strain behavior of, for example, ETFE foils.
For structural analysis and design of tensile membrane structures or their substructures, find more useful add‑on modules under the Steel Structures as well as Aluminium and Light-Weight Structures industry.
The structural analysis software provided by Dlubal can be seamlessly integrated into the Building Information Modeling (BIM) process. A variety of interfaces allows you to exchange data from digital building models with RFEM or RSTAB.
A unique project called "Oxigeno" is currently under construction in San Francisco de Heredia, San José, Costa Rica. The recreational and commercial space, which measures almost 1,345,489 ft², offers the visitor a relaxing shopping atmosphere in harmony with nature.
A unique structure which roofs the main bus station in the Swiss town of Aarau was built at the end of 2013.
The canopy has a cloud-like shape and contains the largest single-chamber cushion in the world. It has a volume of 1810 m 3 and a roofed area of 1070 m 2 .
The Eden Project is a complex of two biomes and outdoor gardens with plants from many diverse climates and environments.
The biome is a steel frame structure with cladding panels consisting of triple-layered membrane cushions made of ETFE foil.
Crossrail Station Canary Wharf in London is a unique wooden structure and one of the largest timber construction projects in the UK.
The roof structure with a total length of 300 m consists of glued laminated timber beams and steel pipes. Under the roof, there is a park inside the building.
Allianz Arena is a soccer stadium in Munich, Germany, which hosted the opening match of the 2006 FIFA World Cup.
The translucent exterior facade of the stadium emits light in various colors and thus makes the whole arena building very special.
The "Pneumatic Wedge Method" is a new technique for the construction of double-curved concrete surfaces by means of pneumatic formwork, which was developed at Vienna University of Technology.
The wildlife crossing AM2 has been built with a construction method for concrete shell structures called Pneumatic Forming of Hardened Concrete (PFHC). This new method has been developed by the TU Wien in the context of the research project "Double Curved Shell Structures"...
Do you have any questions about our products or need advice on selecting the products needed for your projects?
Contact us via our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.
Dlubal Software is a member of the TensiNet Association .
Doctoral Thesis on Membrane Structure Design According to FEA
This PhD thesis by Rostislav Lang deals with the design and analysis of membrane structures using FEA software.
"ACS Production chose RFEM in order to have a versatile software that allows us to design our tensile membranes alongside our steel, timber, or aluminum structures in a single user environment.
The software’s capabilities and user-friendly interface are a real advantage over the competition. What’s more, the customer support’s dedication, modernness, responsiveness, and skillset ensure that each and every one of our projects is properly realized."
In theory, an ideal gas consists of freely moving mass particles without extension in a volume space. In this space, each particle moves at a speed in one direction. The collision of one particle with another particle or the volume limitations lead to a deflection and a change in the speed of the particles.
Section of drawing with top view (top) and section through roof (bottom, © FHS Ingeniería Estructural Ltda.)
In RFEM, there is an option to couple surfaces with the stiffness types "Membrane" and "Membrane Orthotropic" with the material models "Isotropic Nonlinear Elastic 2D/3D" and "Isotropic Plastic 2D/3D" (RF-MAT NL add-on module required).
This functionality enables the simulation of the nonlinear strain behavior of, for example, ETFE foils.
- What is the easiest way to simulate a cushion for the RF‑FORM‑FINDING add‑on module?
- Which Dlubal Software programs are required to calculate membrane and tensile structures?
How do I activate the RF-FORM-FINDING add-on module?
- Is it possible to analyze the effects of an hermetically sealed object with RFEM?
- How is an inflatable object simulated in RFEM?
- I would like to calculate and design "temporary structures." What do I need for this?
- I have already divided my membrane roof into individual surfaces. Can I quickly create a cutting pattern from these surfaces?
- How can I define a material allowance at the edge of a cutting pattern?
- I have modeled a structure made of outer and inner cables as well as membranes, and get a message about instability or the error message "Jacobi matrix is not positive definite" in the RF‑FORM‑FINDING add-on module. What should I do?
- Why does the FE mesh of my conical membrane look like angular after the form-finding?
Recommended for Tensile Membrane Structures
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
Form-finding of tensile membrane and cable structures
Generation of cutting patterns for tensile membrane structures
Design of steel members according to Eurocode 3
Module Extension for RF-STEEL EC3 and RF-STEEL AISC
Warping torsion analysis according to the second-order theory with 7 degrees of freedom
Module Extension for RF-STEEL EC3
Plastic design of cross-sections according the Partial Internal Forces Method (PIFM) and Simplex Method
Design of aluminium members according to Eurocode 9