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STAAD Commands and Input Instructions
Section 5
5-94
End Node
ZZ
Start Node
Gamma = -90°
End Node
X
Gamma = +90°
Start Node
X
Start Node
X
End Node
Z
Start Node
Gamma = -90°
Z
X
End Node
Gamma = +90°
Gamma angle for various configurations of the circular arc lying in the global
XZ plane
Figure 5.13f
Member local axis system
The local axis directions for curved members are dependent on the
point of interest along the curve. The general rules for local axis,
as laid out in Section 1.5.2 of this manual are applicable. The
figure shown later for member end forces indicates the directions
of axes at the start and end nodes.
Rotation of local axis
There is currently no facility available to change the orientation of
a curved member. Hence, BETA ANGLE and REFERENCE
POINT options, explained in section 1.5.3 and 5.26.2 of this
manual, are not available for curved members.