StructuralCurveMemberVarying

1D Member Varying (Arbitrary, Tapered, Haunch,…)

StructuralCurveMemberVarying object describes changing cross section along the length (center line) of existing 1D member (StructuralCurveMember).

Specification in the excel

Name of the column header
Type of data
Value example or enum definition
Required value
Description
Name
String
AD1
yes
Human readable unique name of the Arbitrary definition
Cross sections #
String
CS1,CS2 CS3
yes
The value refers to name of existing cross section.
Can be inputted as pairs or as single.
Pairs are separated by "," and first one refers to Cross section at the start of the segment, second to an end of the segment. Pairs indicates linear change of cross section. Therefore they need to be same type and shape.
Single reference indicates prismatic beam along the span.
# means indexing of the cross sections, e.g. Cross sections 1, Cross sections 2, … Cross sections 99. It depends on how many spans are defined in the StructuralCurveMemberVarying.
Span #
Double
0,3
yes
Relative length of the segment.
Sum of all values per line has to be equal to 1,0.
# means indexing of the span, e.g. Span 1, Span 2, … Span 99. It depends on how many spans are defined in the in the StructuralCurveMemberVarying.
Alignment #
Enum
Centre
Top
Bottom
Left
Right
Top left
Top right
Bottom left
Bottom right
yes
Alignment of each segment (span) can be defined here.
First span:
Centre - In plan view as well as in side view the midline of the 1D member remains straight and horizontal. Both left and right surface are inclined to allow the cross-section change its width. The centre line of the 1D member (i.e. the centroid axis) of the 1D member remains straight. Both top and bottom surface are symmetrically inclined to allow the cross-section change its height.
Top - The top surface of the 1D member remains flat and horizontal. The bottom surface is inclined in order to provide for the change of the height. Top surface is in direction of vertical axis of CSS. Bottom - The bottom surface of the 1D member remains flat and horizontal. The top surface is inclined in order to provide for the change of the height. Bottom surface is in opposite direction of vertical axis of CSS.
Left - The left surface of the 1D member remains flat and horizontal. The right surface is inclined in order to provide for the change of the width. Left surface is in direction of horizontal axis of CSS.
Right - The right surface of the 1D member remains flat and horizontal. The left surface is inclined in order to provide for the change of the width. Right surface is in opposite direction of horizontal axis of CSS.
Other than first span:
Same rules applies with respect to previous span. See pictures in notes section.
# means indexing of the Alignment, e.g. Alignment 1, Alignment 2, … Alignment 99. It depends on how many spans are defined in the arbitrary definition.
Id
String
39f238a5-01d0-45cf-a2eb-958170fd4f39
no
Unique attribute designation

Notes

Reference to Alignment enums - direction of alignment in respect of CSS (LCS respects right hand rule).
Reference to Alignment enums - examples of alignments. (LCS independent)
Last modified 10d ago