We provide hints and tips to help you get started with the basic program RFEM.
Modeling of Factor Pulleys in RFEM
Video
First Steps with RFEM
Description
Modeling in RFEM
When modeling, a cable must be entered as a continuous polyline with at least three nodes. Thus, the program "knows" that the entire cable is an element. Then, you can assign the "Cable to Pulley" member type to this polyline. At least one end of the cable member must have a fixed support or a member, so that the applied tensile load can be transferred. Since the tensile force should be constant in the "cable on pulley", no further definition is necessary for the connected elements. The adjacent elements or nodal supports receive deflection forces if there is buckling on the cables.
When modeling, rigid members were applied in such a way that the slab force can be displayed on a support. Additional stabilizing supports were arranged on the loose rollers to counteract the instability.
The required tension path was applied by means of an imposed nodal deformation.
Keywords
Dlubal Knowledge Base Pulley Cable on Pulleys Dlubal KB Knowledge Base Technical Contribution
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Block and Tackle Pulley System | Options and Modeling
This article describes the basic principles and modeling approaches of pulley systems in RFEM.
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- Craneway and weld stress analysis
- Craneways and weld fatigue design
- Deformation analysis
- Plate buckling analysis for wheel load introduction
- Stability analysis for lateral torsional buckling according to the second-order analysis of torsional buckling (1D FEA element)
For the design according to Eurocode 3 the following National Annexes are available:
-
DIN EN 1993-6/NA:2010-12 (Germany) 
NBN EN 1993-6/ANB:2011-03 (Belgium)-
SFS EN 1993-6/NA:2010-03 (Finland) 
NF EN 1993-6/NA:2011-12 (France)
UNI EN 1993-6/NA:2011-02 (Italy)
LST EN 1993-6/NA:2010-12 (Lithuania)
NEN EN 1993-6/NB:2012-05 (The Netherlands)
NS EN 1993-6/NA:2010-01 (Norway)
SS EN 1993-6/NA:2011-04 (Sweden)
CSN EN 1993-6/NA:2010-03 (Czech Republic)
BS EN 1993-6/NA:2009-11 (United Kingdom)
CYS EN 1993-6/NA:2009-03 (Cyprus)
In addition to the National Annexes (NA) listed above, you can also define a specific NA, applying user-defined limit values and parameters.
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- Where can I find the action category for cranes in my load cases?
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- Is it necessary to enter the loads of a crane for each axle or wheel in the table of crane loads in Window 1.4?
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