RAM DA - Trouble getting GetMemberForces to work

I'm attempting to retrieve the design forces for the start/end of the member from RAM structural systems using VBA and running into a problem with the GetMemberForces command. 

Below is an example of how I'm attempting to extract the strong shear at the start of the beam:

Dim lMemberID As Long
Dim lAnalysisCaseID As Long
Dim bApplyLLReduction As Long
Dim dMx_maj As Double
Dim test As SForce

Set IForces = RamDataAcc1.GetDispInterfacePointerByEnum(IForces2_INT)
r1 = test.dVx_maj
startMajShear = IForces.GetMemberForces(lMemberID, eStart, lAnalysisCaseID, RAMGravityResultType, bApplyLLReduction, r1)

What am I misunderstanding?

  • The DataAccess manual installs with RAM Structural System under the Manuals folder.  Take a look at the GetMemberForces method in the IForces2 interface.

    startMajShear is a return argument for the method.  This is a COM code to see if the method call passes or fails for some reason.
    lMemberID is an input argument.  Make sure you are passing in a valid member unique ID.
    lAnalysisCaseID is an input arguement.  Make sure you are passing in a valid analysis case ID.
    bApplyLLReduction is an input arguement.  Make sure you are passing in 0 or 1.
    r1 should be changed to test since the last argument is a return argument with type SForce. 
    After test is set by the method, then you can use the command r1 = test.dVx_maj

    You appear to be looking for RAM Gravity forces for steel beams.  I prefer to use the GetGravBeamForcesLeftAt method in the IForces1 interface.  The attached Excel VBA example uses that method, so use it as a reference.  The macro finds gravity steel beam reactions a little differently than RAM Steel Beam.  When there are cantilever beams, it reports the reaction on both sides of the support rather than a single reaction at the support.

    .DA Gravity Steel Beam Reactions.xls

    Answer Verified By: Stephen Smith