Different ratio result by API than manual method

[Anonymous]

Hi everyone,

I'm doing a test in order to obtain the maximum ratio of a steel profile in a group code according to different design codes.

For Eurocode and AS4100 (australian) codes no problem, the ratio result are the same one.

But for ANSI/AISC 360-16 i'm getting different values, for example:

- API method -> Ratio: 0.876

- Manual Method -> Ratio: 0.58

Below a picture with both methods:

The code used for this purpose is the following:

Set RobApp = New RobotApplication
RobApp.Project.Preferences.SetActiveCode I_CT_STEEL_STRUCTURES, Dcode
'Dcode is the key to define the design code: ANSI/AISC 360-16 or EC3_2004 or ....

Dim RDmServer As IRDimServer
Set RDmServer = RobApp.Kernel.GetExtension("RDimServer")
RDmServer.Mode = I_DSM_STEEL
Dim RDmEngine As IRDimCalcEngine
Set RDmEngine = RDmServer.CalculEngine

'the part below is optional, use it if you want to set calculation parameters by the code
Dim RDmCalPar As IRDimCalcParam
Dim RDmCalCnf As IRDimCalcConf
Set RDmCalPar = RDmEngine.GetCalcParam
Set RDmCalCnf = RDmEngine.GetCalcConf
   
RDmCalCnf.NPointsNum = 10

Dim RdmStream As IRDimStream 'Data stream for setting parameters
Set RdmStream = RDmServer.Connection.GetStream
RdmStream.Clear
        
'Calculate results for all sections
RdmStream.WriteText (1) ' member(s) selection
RDmCalPar.SetObjsList I_DCPVT_GROUPS_VERIF, RdmStream    'for verification of groups
RDmCalPar.SetLimitState I_DCPLST_ULTIMATE, 1  'Set Limit State
RdmStream.Clear

RDmEngine.SetCalcConf RDmCalCnf
RDmEngine.SetCalcParam RDmCalPar
'end of calclulation parameter settings
              
RDmEngine.Solve Nothing

Dim RdmAllRes As IRDimAllRes
Set RdmAllRes = RDmEngine.Results
Dim RdmDetRes As IRDimDetailedRes
Set RdmDetRes = RdmAllRes.Get(1)
H18.Cells(10, 5) = RdmDetRes.GovernCaseName
H18.Cells(10, 6) = RdmDetRes.Ratio
H18.Cells(10, 3) = RdmDetRes.ProfileName
H18.Cells(10, 4) = RdmDetRes.MaterialName

Does anyone know what happens?
The strange thing is that of 3 codes it works in 2 and in one it does not.

Thanks!

[Anonymous]

Please , @Rafal.Gaweda any idea about this issue?

Thanks a lot.

[Anonymous]

Dear all,

I can't solve this problem, I guess anything in previous code is not compatible with ANSI/AISC 360-16.

Could anyone know what happens?

Thanks a lot.

[Rafal.Gaweda · Accepted solution]

Hi @Anonymous 

I am afraid You are right.

I will register it for further investigation and fixing.

Thank You for reporting it.

[Anonymous]

Just it case It's could help, In 2021 version this issue happens as well.

[Anonymous]

Hi @Rafal.Gaweda 

Is this issue fixed in the HotFix? I didn't installed it yet.