Beam End Release
Enter the end release conditions (Hinge, Sliding, Roller Joint and Partial Fixity) at both ends of beam elements, or replace or remove previously entered end release conditions.
Beam End Offsets can be specified in conjunction with (Beam End Offsets).
From the Main Menu select Boundary > Release/Offset > Beam End Release.
Click
to the right of Beam
End Release: Display the Beam End Release Table
Boundary Group
Name
Select a Boundary Group in which
the specified boundary condition is included. Select "Default"
if Group assignment is unnecessary. Click
to the right to prompt the "Define
Boundary Group" dialog box to add, modify or delete Boundary
Groups.
Options
Add/Replace: Enter or replace end release conditions at both ends of selected beam elements
Delete: Delete previously entered end release conditions at both ends of selected beam elements
General Types and
Partial Fixity
Enter connection and partial fixity condition for each DOF at both ends in the element's local coordinate system.
Enter Partial Fixity in terms of the stiffness ratio of the beam element. 0.3 for My (bending moment) of i-Node (N1 end node) in the dialog box represents 30% of My flexural stiffness is to be effective.
Type
Relative
Enter the stiffness ratio. For example, 0 represents completely released condition and 1 does fully fixed condition.
Value
Enter true magnitudes of stiffness values to define Partial Fixity.
Fx: Release axial force in the element's local x-direction and enter Partial Fixity if necessary.
Fy: Release shear force in the element's local y-direction at the relevant end and enter Partial Fixity if necessary.
Fz: Release shear force in the element's local z-direction at the relevant end and enter Partial Fixity if necessary.
Mx: Release torsional moment about the element's local x-axis at the relevant end and enter Partial Fixity if necessary.
My: Release moment about the element's local y-axis at the relevant end and enter Partial Fixity if necessary.
Mz: Release moment about the element's local z-axis at the relevant end and enter Partial Fixity if necessary.
Mb: Release bi-moment about the element's local x-axis at the relevant end and enter Partial Fixity if necessary. Bi-moment method which is approximate method of torsion analysis for considering warping effect.
Note
In construction stage analysis, internally, the program always
considers the partial fixities as pinned conditions.
The following buttons simplify the individual data entries described above:
To release the bending stiffness about the element's local y- and
z-axes at both ends
To release the bending stiffness about the element's local y- and
z-axes at N1 end
To release the bending stiffness about the element's local y- and
z-axes at N2 end
To restore all the end release conditions at both ends to fixed
conditions
Revision of Gen 2014 (v1.1)
