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Frequently Asked Questions (FAQ)
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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
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.
AnswerThe 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.
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 188.8.131.52, 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).
You can find detailed information about orthotropy in the appendix as a PDF file for download.
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.UnlockLicense
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.
AnswerIn 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.
Unfortunately, it is not. Dlubal Software requires specialized knowledge in the field of structural analysis; therefore, the student version is only available to students of technical colleges and universities teaching structural analysis, engineering mechanics, and similar subjects.
AnswerThe trapezoidal sheet is modeled as an orthotropic surface. In the default setting, the arches of the trapeziodal sheet are in the x directions, which is the same direction of the IPE 120 beams.
If you set the orthotropy direction to 90 degrees, that is, perpendicular to the beams, the moments will increase. If the sheet metal arches are perpendicular to the beams, the stiffness in the second direction is very small, so the load is transferred first between the IPE 120 beams.
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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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