StructuralCurveMoment

Line Moment on the beam

The Line moment load models load distributed over a 1D member (StructuralCurveMember), 1D member Rib (StructuralCurveMemberRib) or on a slab edge (StructuralSurfaceMember). It may be action along the whole 1D member or only on its part. It can be constant or trapezoidal, acting in three main directions X, Y, Z (global or local coordinate system).

Specification in the excel

Name of the column header
Type of data
Value example or enum definition
Required value
Description
Name
String
LMS1
yes
Human readable unique name of the force
Type
String
Standard
no
This property defines what the load is caused by, E.g. Standard, Wind, Snow, Self weight, Hoar Frost, Predefined, Plane Load, Water Pond, Water Pressure, Soil Pressure, Generated Water, Generated Soil
Force action
Enum
On beam
On edge
On subregion
edge
On opening edge
On rib
yes
Specifies on which type of object the force acts
Distribution
Enum
Uniform
Trapez
yes
The line moment may be either constant along the 1D member or linearly variable (trapezoidal).
Direction
Enum
Mx
My
Mz
yes
Specifies the base direction of the load
Value 1 [kNm/m]
Double
-150
yes
Specifies the first size of the moment in kilonewton meters per meter
Value1 is always closer to origin (see notes)
Value 2 [kNm/m]
Double
-180
yes, if Distribution = Trapez
Specifies the second size of the load in kilonewton meters per meter
Value1 is always further from origin (see notes)
Member
String
B11
yes, if Force action = On beam
The name of the StructuralCurveMember on which the load is applied
Member Rib
String
B11
yes, if Force action = On rib
The name of the StructuralCurveMemberRib on which the load is applied
2D Member
String
S1
yes, if Force action = On edge
The name of the StructuralSurfaceMember on which the load is applied. StructuralCurveAction can act either on a 2D member edge or on internal edge.
2D Member Region
String
R1
yes, if Force action = On subregion edge
The name of the StructuralSurfaceMemberRegion on which is the load applied.
2D Member Opening
String
O1
yes, if Force action = On opening edge
The name of the StructuralSurfaceMemberOpening on which is the load applied.
Edge
Integer
1
yes, if Force action = On edge, On opening edge or On subregion edge
The index starting with 1. The order is according to order of “edges” property at StructuralSurfaceMember, StructuralSurfaceMemberOpening or StructuralSurfaceMemberRegion on which the load is applied
Internal edge
String
ES2
yes, if Force action = On edge
The name of the StructuralCurveEdge on which is the load applied. StructuralCurveMoment can act either on a 2D member edge or on internal edge.
Load case
String
LC1
yes
The name of the load case to which the force belongs
Coordinate system
Enum
Global
Local
yes
Defines the co-ordinate system of the member in which the load is applied
Location
Enum
Length
Projection
yes
Specifies whether the load is "put directly on an inclined 1D member" or whether the "projection on plan" is defined.
Coordinate definition
Enum
Absolute
Relative
yes
Selects the coordinate system that is used to define the length of the line load. Relative means without units. To define length of the load in meters input absolute
Origin
Enum
From start
From end
yes
Specifies the origin of the coordinate system used for the definition of the length of the force
Extent
Enum
Full
Span
yes
Defines if a load is extended just over a span instead of the whole 1D member, it is used if a 1D member consists of more than one span. This feature is not fully supported, only two spans are supported in the moment.
Start point [m]
Double
value in meters for Coordinate definition = Absolute
0,0
value in percentage for Coordinate definition = Relative
0,0
yes
Defines the position of the start point of the moment in relative or absolute coordinates [m]
End point [m]
Double
value in meters for Coordinate definition = Absolute
5,25
value in percentage for Coordinate definition = Relative
1,0
yes
Defines the position of the end point of the moment in relative or absolute coordinates [m]
Parent ID
String
67b35d84-3d04-47aa-aa4a-dc1263982320
no
Is filled for objects created be dividing curved geometry to series of straight line objects. Parent ID will ensure that curved edge is imported as straight parts to nonsupporting application, and back to original supporting application as curved geometry.
To ensure successful round trip of segmented objects and their related objects, Parent ID needs to be present in both directions.
Id
String
39f238a5-01d0-45cf-a2eb-958170fd4f39
no
Unique attribute designation

Notes

Difference between Location type Length and Projection can be seen in the picture. Location is used only if Coordinate system is Global.
An example of use of parameter Extent is in the in the picture below. In case of Span the load acts only on the span which is defined by internal nodes
An example with Distribution type Trapez and with different values 1 and 2 can be seen in the following picture. Coordinate definition is relative, start point 0 and end point 0,3. StructuralCurveAction 1 has origin "From start" and StructuralCurveAction 2 has origin "From end". In this case the parameter extent doesn’t make any difference, only in case of beams consisting of more parts.
Last modified 10d ago