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• ### I encountered a sharing violation while importing a dxf file into Shape-Thin. What is the issue?

The dxf file is currently being used by another program such as CAD. Close the file and import the file again.

• ### Why are certain model generators only displayed inactive/grayed?

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To use the model generator, you may have to adjust the model type within the general data. For example, a 2D truss requires either the "2D-in XZ" or "3D" model type.

The "Edit Model General Data" dialog box is opened as follows:

• Project Navigator - Data
• Right -click on model data
• General Data
• Model type, see picture

• ### I have installed Halfen HDB 13.60 on my PC. The version does not seem to be compatible with RF-PUNCH Pro anymore. The interface does not work. I am using version 5.26.02 of RFEM.

Version 13.60 of Halfen HDB was released after the release of RFEM 5.26.02. Thus, version 13.60 of Halfen HDB is not compatible with versions of RFEM (up to 5.26.02).

We are working on a solution and hope to be able to offer the interface again as soon as possible.

• ### When solving a foundation slab under a circular tank, I do not see the contact stress in the middle of the surface. What could be the reason for this?

The problem is the setting of the governing load case, from which the determination of the vertical springs is derived. You have selected LC2, which is not suitable for this. The load in this LC is only circumferential. Therefore, the plate is lifted in the middle. The program for the middle part of the plate in the air does not determine any vertical springs, so the surface is not actually supported there.
• ### Can the reduction of strength in the heat affected zone (HAZ) be taken into account in the RF-/ALUMINUM add-on module?

If member sections are connected by welds, you can define the arrangement and design of the transverse welds in Window 1.5. This allows you to determine the softening of the cross -section in the heat affected zone.

According to EN 1999-1-1 clause 6.1.6.2, NOTE 2, two alternatives are available to consider the reduced strength:
In the case of the reduced stress method, the strengthvalues f o, haz and fu, haz are reduced according to Table 3.2. The reduced cross -section method, on the other hand, uses reduced cross -section properties for the designs (area A, section moduli W, moments of inertia I).

• ### Is it possible to export RWIND Simulation results into a GIS software or any other external program?

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RWIND Simulation results are stored as a VTK format (.vtp and .vtu files) located in the working directory of the project.

The files can be opened in ParaView which is an open source software available at https://www.paraview.org. The data can further exported to many other formats. Becuase ParaView is an open source software and allows the use of custom plugins, it is possible to export data to any custom format.

• ### How can I create a member eccentricity using the COM interface?

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In order to be able to assign an eccentricity to a member, it is usually necessary to create it before setting the member.

Another approach is shown in the following example. First, the eccentricity is created and then assigned to an existing member via its interface:

'---------------------Sub SetEccentricity()'---------------------Dim model As RFEM5.modelSet model = GetObject(, "RFEM5.Model")model.GetApplication.LockLicenseOn Error GoTo eDim iModData As RFEM5.iModelDataSet iModData = model.GetModelData'   create eccentricityDim eccens(0 To 0) As RFEM5.MemberEccentricityeccens(0).No = 1eccens(0).Comment = "test eccentricity"eccens(0).ReferenceSystem = LocalSystemTypeeccens(0).Start.X = 0eccens(0).Start.Y = 0eccens(0).Start.Z = 0eccens(0).End.X = 0eccens(0).End.Y = 0eccens(0).End.Z = 0eccens(0).HingeAtEndNode = Falseeccens(0).HingeAtStartNode = Falseeccens(0).HorizontalAlignment = Middleeccens(0).VerticalAlignment = Bottomeccens(0).TransverseOffset = Trueeccens(0).ReferenceObjectNo = 2eccens(0).ReferenceObjectType = MemberObjecteccens(0).HorizontalAxisOffset = Middleeccens(0).VerticalAxisOffset = Topeccens(0).StartAdjoiningMembersOffset = Falseeccens(0).EndAdjoiningMembersOffset = FalseiModData.PrepareModificationiModData.SetMemberEccentricities eccensiModData.FinishModification'   add eccentricity to memberDim iMem As RFEM5.IMemberSet iMem = iModData.GetMember(1, AtNo)Dim mem As RFEM5.Membermem = iMem.GetDatamem.EccentricityNo = 1iModData.PrepareModificationiMem.SetData memiModData.FinishModificatione:      If Err.Number <> 0 Then MsgBox Err.Description, , Err.Sourcemodel.GetApplication.UnlockLicenseEnd Sub

Member eccentricities can only be transferred as a field; for this purpose, a field with only one element has been created. In the attached image, the individual elements are itemized with reference to the graphical elements.

• ### What is the difference between SHAPE‑THIN 9 and SHAPE‑THIN 8?

In SHAPE-THIN 9, you can model cold-formed sections andeffective cross-sections according to EN 1993‑1‑3 and EN 1993‑1‑5. This is not possible in SHAPE‑THIN 8.

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First steps

We provide information and tips to help you get started with the basic program RFEM and RSTAB.

Wind Simulation & Wind Load Generation

With the stand -alone program RWIND Simulation, you can simulate wind flows around simple or complex structures by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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