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 Model > Boundaries > Beam End Release.

 

Select Geometry > Boundaries > Beam End Release in the Menu tab of the Tree Menu.

 

 

 

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.

 

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