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Section 5
5-53
5.17 Rotation of Structure Geometry
Purpose
This command may be used to rotate the currently defined joint
coordinates (and the attached members/elements) about the global
axes.
General format:
*
⎧X d⎫
1
PERFORM ROTATION ⎨Y d⎬
2
⎩
Z d
3
⎭
where, d
1
, d
2
, d
3
are the rotations (in degrees) about the X, Y and
Z global axes respectively. This command may be entered after
the Joint Coordinates or between two Joint Coordinate commands
or after all Member/Element Incidences are specified. This
command can be used to rotate the structure geometry (defined
prior to this command) by any desired angle about any global axis.
The rotated configuration is used for analysis and design. While
specifying this command, the sense of the rotation should conform
to the right hand rule.
Description
This command can be used to rotate the geometric shape through
any desired angle about any global axis. The rotated configuration
can be used for analysis and design.
Example
PERFORM ROTATION X 20 Z -15