GetIBC2012 {Auto Seismic}

GetIBC2012

Syntax

SapObject.SapModel.LoadPatterns.AutoSeismic.GetIBC2012

VB6 Procedure

Function GetIBC2012(ByVal Name As String, ByRef DirFlag As Long, ByRef Eccen As Double, ByRef PeriodFlag As Long, ByRef CtType As Long, ByRef UserT As Double, ByRef UserZ As Boolean, ByRef TopZ As Double, ByRef BottomZ As Double, ByRef R As Double, ByRef Omega As Double, ByRef Cd As Double, ByRef I As Double, ByRef IBC2012Option As Long, ByRef Latitude As Double, ByRef Longitude As Double, ByRef ZipCode As String, ByRef SS As Double, ByRef S1 As Double, ByRef TL As Double, ByRef SiteClass As Long, ByRef Fa As Double, ByRef Fv As Double) As Long

Parameters

Name

The name of an existing Quake-type load pattern with a IBC2012 auto seismic load assignment.

DirFlag

This is either 1 or 2, indicating the seismic load direction.

1 = Global X

2 = Global Y

Eccen

The eccentricity ratio that applies to all diaphragms.

PeriodFlag

This is 1, 2 or 3, indicating the time period option.

1 = Approximate

2 = Program calculated

3 = User defined

CtType

This is 0, 1, 2 or 3, indicating the values of Ct and x. This item is meaningful when the PeriodFlag item is 1 or 2.

0 = Ct = 0.028 (ft),x = 0.8

1 = Ct = 0.016 (ft),x = 0.9

2 = Ct = 0.03 (ft),x = 0.75

3 = Ct = 0.02 (ft),x = 0.75

UserT

The user specified time period. This item is meaningful when the PeriodFlag item is 3. [s]

UserZ

This item is True if the top and bottom elevations of the seismic load are user specified. It is False if the elevations are determined by the program.

TopZ

This item applies only when the UserZ item is True. It is the global Z-coordinate at the highest level where auto seismic loads are applied. [L]

BottomZ

This item applies only when the UserZ item is True. It is the global Z-coordinate at the lowest level where auto seismic loads are applied. [L]

R

The response modification factor.

Omega

The system overstrength factor.

Cd

The deflection amplification factor.

I

The occupancy importance factor.

IBC2012Option

This is 0, 1 or 2, indicating the seismic coefficient option.

0 = Ss and S1 from USGS by latitude and longitude

1 = Ss and S1 from USGS by zip code

2 = Ss and S1 are user defined

Latitude, Longitude

The latitude and longitude for which the seismic coefficients are obtained. These items are meaningful only when IBC2012Option = 0 or 1.

ZipCode

The zip code for which the seismic coefficients are obtained. This item is meaningful only when IBC2012Option = 1.

SS, S1

The seismic coefficients Ss and S1.

TL

The long-period transition period. [s]

SiteClass

This is 1, 2, 3, 4, 5 or 6, indicating the site class.

1 = A

2 = B

3 = C

4 = D

5 = E

6 = F

Fa, Fv

The site coefficients Fa and Fv.

Remarks

This function retrieves auto seismic loading parameters for the 2012 IBC code.

The function returns zero if the parameters are successfully retrieved; otherwise it returns a nonzero value.

VBA Example

Sub GetSeismicParametersIBC2012()

'dimension variables

Dim SapObject as cOAPI

Dim SapModel As cSapModel

Dim ret As Long

Dim DirFlag As Long

Dim Eccen As Double

Dim PeriodFlag As Long

Dim CtType As Long

Dim UserT As Double

Dim UserZ As Boolean

Dim TopZ As Double

Dim BottomZ As Double

Dim R As Double

Dim Omega As Double

Dim Cd As Double

Dim I As Double

Dim IBC2012Option As Long

Dim Latitude As Double

Dim Longitude As Double

Dim ZipCode As String

Dim SS As Double

Dim S1 As Double

Dim TL As Double

Dim SiteClass As Long

Dim Fa As Double

Dim Fv 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.New3DFrame(BeamSlab, 2, 144, 3, 336, 2, 432)

'add new load pattern

ret = SapModel.LoadPatterns.Add("EQX", LTYPE_QUAKE)

'assign IBC2012 parameters

ret = SapModel.LoadPatterns.AutoSeismic.SetIBC2012("EQX", 1, 0.05, 1, 1, 0, False, 0, 0, 8, 3, 5.5, 1, 1, 0, 0, "94704", 0, 0, 8, 3, 0, 0)

'get IBC2012 parameters

ret = SapModel.LoadPatterns.AutoSeismic.GetIBC2012("EQX", DirFlag, Eccen, PeriodFlag, CtType, UserT, UserZ, TopZ, BottomZ, R, Omega, Cd, I, IBC2012Option, Latitude, Longitude, ZipCode, SS, S1, TL, SiteClass, Fa, Fv)

'close Sap2000

SapObject.ApplicationExit False

Set SapModel = Nothing

Set SapObject = Nothing

End Sub

Release Notes

Initial release in version 16.0.0.

See Also

SetIBC2012