Local Direction Force Sum provides internal forces on a selected plane
in plate or solid elements. The resultant forces and the acting point
are calculated on the basis of all the nodal forces included in the selected
plane. Once a detail analysis is carried out for a specific part of the
structure, this function conveniently calculates the member forces for
structural design.
From the Main
Menu select Results
> Local Direction Force Sum.
Select Results
> Local Direction Force Sum in the Menu tab of the
Tree Menu.
Local
Direction Force Sum dialog box
Mode
Assign the method of selecting the subject
plane that includes the nodes where internal forces are to be combined
Solid Face
Polygon Select
Define a plane within solid elements. The plane is selected by Polygon
Select.
Plate Edge
Line Select
Define a plane within plate elements. The plane is selected by defining
a straight line passing through the plate element nodes.
Plate Edge
Polygon Select
Define a plane within plate elements. The plane is selected by Polygon
Select. (Application example: When selecting the cross section of a steel
beam as a plane)
Load Case
Select a desired load case or load combination.
Envelop Type load combination cannot be selected.
Tolerance
Tolerance defining a line or polygon
Coordinate Input
Positions:
Enter the GCS coordinates of the points necessary to assign a line or
polygon
Note
Enter the coordinates of the points, or click the entry field and the desired
points to automatically enter the coordinates. To select Plate Edge Line
Select, enter the coordinates of the two points defining a line and additionally
enter the coordinates of the 3rd point that defines the direction as to
which side of the elements are
to be considered.
Vector:
Enter a vector to define the z-axis of the local coordinate system to
which Result Output is referenced
Plate Edge Line
Note
The sum of nodal internal forces for each
element is calculated at the center of the selected plane section with
respect to the local coordinate system.
When
defining a
polygon, the local axes are determined by the entry sequence of the coordinates of
the points (right hand rule).
If
the z-vector is not defined, the direction from the 1st to 2nd point of
the polygon becomes
the local z-axis by default.
Click in the Local Direction Force Sum
dialog box to review the local
coordinate axes displayed at the centroid.
Local coordinate system convention (when z-vector is not
specified)
Result Output
Produce the position of the centroid of the
defined section and the sum of internal forces for each direction.
Name
Define a name, which will be used to register
in a list of centroid locations of defined sections and internal force
sums for each direction.
: Calculated results are produced
in a text file. Using this function allows us to save multiple locations
where we wish to find the sums of internal member forces, which can be
output in a text file.
Mode
in the Local Direction Force Sum
dialog box to review
: Calculated results are produced
in a text file. Using this function allows us to save multiple locations
where we wish to find the sums of internal member forces, which can be
output in a text file.