Applies To
	Product(s):	STAAD.Pro
	Version(s):	All
	Environment:	N/A
	Area:	OpenSTAAD
	Subarea:	Load
	Original Author:	Bentley Technical Support Group, Shreyanka Bhattacharjee

Problem Description:

How to assign member concentrated force using OpenSTAAD functions

Solution:

You need to use function AddMemberConcForce to assign member concentrated force. You also need to use SetLoadActive to make the specified load number active, in order to add this load item.

Parameter:

SetLoadActive : 

[Input] LoadNo: The load case reference number ID

AddMemberConcForce: 

[Input] BeamNo: Member number ID(s) 

[Input] Direction: Load direction: (= 1 to 6 for LocalX, LocalY, LocalZ, GlobalX, GlobalY and GlobalZ, respectively)

[Input] Load: Magnitude of the concentrate force in current unit

[Input] D1: Distance from the start of the member to concentrated force or moment

[Input] D2: Perpendicular distance from the member shear center to the local plane of loading. For additional information, please refer to Section 5.32.2 of the Technical Reference manual

Sample VBA Syntax:

Set objOpenStaad = GetObject(, "StaadPro.OpenSTAAD")

Dim BeamNo As Long

Dim Direction As Long

Dim Load(3) As Double ' CONCENTRATED FORCE value

Dim D1(3) As Double

Dim D2(3) As Double

Dim LoadNo As Long

 

BeamNo = 141 ' Member ID

Direction = 5 '5:GY

Load(0) = -1.1

Load(1) = -2.2

Load(2) = -3

Load(3) = -4.2

 

D1(0) = 0.5

D1(1) = 1

D1(2) = 1.5

D1(3) = 2

 

For i = 0 To 3

    D2(i) = 0

Next i

 

LoadNo = 4 'Load case 4

objOpenStaad.Load.SetLoadActive LoadNo

For i = 0 To 3

    objOpenStaad.Load.AddMemberConcForce BeamNo, Direction, Load(i), D1(i), D2(i)

Next i

Output:

Array can be used for variable BeamNo to assign member concentrated force to multiple load members