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How are restraints in RF-FORM-FINDING dealt with in terms of the prestress load to be applied? Is it necessary to assign a prestressing force to the restraints?

Answer

For form-finding, it is primarily important to apply a prestress for the membrane and any provided edge cables. The restraints do not have to be prestressed.

The bracing can be installed as tension members with their initial length (see the figure). As a result of the prestressed membrane and edge cables, the load for bracing is obtained during the calculation.

Keywords

Form-finding Bracing Prestress

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RFEM Main Program
RFEM 5.xx

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 Tensile Membrane Structures
RF-FORM-FINDING 5.xx

Add-on Module

Form-finding of tensile membrane and cable structures

Price of First License
1,750.00 USD