SetDampInterpolated {Response Spectrum}

SetDampInterpolated

Syntax

SapObject.SapModel.LoadCases.ResponseSpectrum.SetDampInterpolated

VB6 Procedure

Function SetDampInterpolated(ByVal Name As String, ByVal DampType As Long, ByVal NumberItems As Long, ByRef Time() As Double, ByRef Damp() As Double) As Long

Parameters

Name

The name of an existing response spectrum load case.

DampType

This is either 5 or 6, indicating the interpolated modal damping type.

5 = Interpolated damping by period

6 = Interpolated damping by frequency

NumberItems

The number of Time and Damp pairs.

Time

This is an array that includes the period or the frequency depending on the value of the DampType item. [s] for DampType = 5 and [cyc/s] for DampType = 6

Damp

This is an array that includes the damping for the specified period of frequency (0 <= Damp < 1).

Remarks

This function sets interpolated modal damping data for the specified load case.

The function returns zero if the damping is successfully set; otherwise it returns a nonzero value.

VBA Example

Sub SetCaseResponseSpectrumDampInterpolated()

'dimension variables

Dim SapObject as cOAPI

Dim SapModel As cSapModel

Dim ret As Long

Dim MyTime() As Double

Dim MyDamp() As Double

'create Sap2000 object

Set SapObject = CreateObject("CSI.SAP2000.API.SapObject")

'start Sap2000 application

SapObject.ApplicationStart

'create SapModel object

Set SapModel = SapObject.SapModel

'initialize model

ret = SapModel.InitializeNewModel

'create model from template

ret = SapModel.File.New2DFrame(PortalFrame, 2, 144, 2, 288)

'add response spectrum load case

ret = SapModel.LoadCases.ResponseSpectrum.SetCase("LCASE1")

'set interpolated damping

ReDim MyTime(2)

ReDim MyDamp(2)

MyTime(0) = 0.001

MyDamp(0) = 0.1

MyTime(1) = 0.3

MyDamp(1) = 0.03

MyTime(2) = 1

MyDamp(2) = 0.05

ret = SapModel.LoadCases.ResponseSpectrum.SetDampInterpolated("LCASE1", 5, 3, MyTime, MyDamp)

'close Sap2000

SapObject.ApplicationExit False

Set SapModel = Nothing

Set SapObject = Nothing

End Sub

Release Notes

Initial release in version 11.02.

Changed nomenclature from Load Cases, Analysis Cases and Response Combinations to Load Patterns, Load Cases and Load Combinations, respectively, in version 12.00.

See Also

GetDampInterpolated