Membrane Structures with Wind Loads From CFD Wind Simulation
Information about the Free Webinar
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Nicholas J. Greven P.Eng.
23 July 2019
This webinar demonstrates how wind loads can be determined in RFEM for membrane structures by means of CFD wind simulations.
Date | Time
Event Language
EnglishContent
Webinar | Membrane Structures with Wind Loads From CFD Wind Simulation
Time Schedule
| 00:00 | Introduction |
| 04:00 | Modeling of a grandstand roof including loads (self-weight, snow) |
| 46:40 | Wind load generation based on CFD |
| 55:00 | Combination of loads |
| 1:03:20 | Stability analysis in RF-STABILITY |
| 1:07:20 | Member design in RF-STEEL EC3 |
| 1:10:10 | Consideration of additional objects that have an influence on the wind flow |
Presentation Model to Download
Below, under Models to Download, you will find the model(s) used in the webinar. This will allow you to independently follow the webinar step by step with the provided model after the presentation is complete.Keywords
Free online webinar Tensile Fabric Cable Form-finding CFD Wind Stability Steel Temporary structure
Downloads
- Presentation slides of the webinar "Membrane Structures with Wind Loads From CFD Wind Simulation" (PDF)
- Model of a staircase in the format VTP for consideration in RWIND Simulation
Links
- Download Recorded Webinar
- Analysis & Design Software for Tensile Membrane Structures
- Software for Form-Finding and Cutting Patterns of Membrane Structures
- Software for Wind Simulation & Wind Load Generation on Structures
- Product Description | RWIND Simulation - Wind Simulation (Wind Tunnel)
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Specific Requirements of Membrane Structures
This paper is focused on the specific aspects of designing membrane structures that have specific requirements, such as form-finding and cutting pattern generation. These topics are the focus of many research works, and many methods have been proposed to achieve the desired results. However, in this paper these issues will be discussed more from a practical than a theoretical point of view. The paper will be followed by examples that will complement the topic under discussion and show the special attention required during the design process.
Nonlinear Material Law for Membranes
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.
- Is it possible to also design membrane structures in RFEM?
- Is it possible to analyze the effects of an hermetically sealed object with RFEM?
- How do I activate form-finding of a membrane surface?
- How can I influence the sag of the found shape in RF‑FORM‑FINDING?
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The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
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How do I define a member as a cantilever and not as supported at both ends for serviceability or deflection design?
- How do I create a user-defined Design Situation with my own chosen load combinations?
- Why do the results in a modal analysis differ between the initial prestress and the surface load?
- Where can I find the materials for the corresponding National Annexes in RFEM 6 and RSTAB 9?
- How do I apply wind load on members of open structures?
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How do I define a member as a cantilever and not as supported at both ends for serviceability or deflection design?
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