API - changing the member buckling coefficient

[Anonymous]

Hi all 

I'm developing an API-VB.net code to carry out steel design and i need to modify the buckling length coefficient factor, the code manages to change the value but not the symbol as you can see in the attached photo, moreover, when i run the design, the buckling is assigned as no buckling "X" !! and no length neither the coefficient is identified.. Bellow my code. Great thanks for any help 

Dim ROBOT As New RobotOM.RobotApplication

ROBOT.Project.Preferences.SetActiveCode(IRobotCodeType.I_CT_STEEL_STRUCTURES, "EC3")

Dim designlabel As IRobotLabel
Dim RdmMembDefData As IRDimMembDefData
Dim RdmCodeMembDefPar As IRDimMembParamsEC3

designlabel = Label.Create(IRobotLabelType.I_LT_MEMBER_TYPE, "My pars")

RdmMembDefData = designlabel.Data

With RdmMembDefData
.SetStructureSwayYZ(IRDimMembDefBucklingDataType.I_DMDBDT_BUCKLING_Y, 1)
.SetLengthYZUV(IRDimMembDefLengthDataType.I_DMDLDT_LENGTH_Y, 5)
.SetStructureSwayYZ(IRDimMembDefBucklingDataType.I_DMDBDT_BUCKLING_Z, 0)
.SetLengthYZUV(IRDimMembDefLengthDataType.I_DMDLDT_LENGTH_Z, 6)
End With

RdmCodeMembDefPar = RdmMembDefData.CodeParams
With RdmCodeMembDefPar
.BuckLengthCoeffY = 0.7
.BuckLengthCoeffZ = 0.7
.TubeControl = 1
End With

RdmMembDefData.CodeParams = RdmCodeMembDefPar
RdmMembDefData.Type = IRDimMembDefType.I_DMDT_COLUMN
ROBOT.Project.Structure.Labels.Store(designlabel)

[Rafal.Gaweda · Accepted solution]

Hi @Anonymous

It is correctly defined by API - see right hand side screen shot.

Left hand side screen shot shows design results. I do not see any code related to getting steel design results in your post.

In fact there is no buckling in your results because axial force is a tensile (not compression) force on your screen shot.

[Anonymous]

Thanks Rafal  

You are absolutely right, the code works well, i checked another element subjected to compression and the buckling length is determined correctly. 

Cheers !!