Cross-Frame/Diaphragm Definition Dialog

Save DGN

The following button will export the Cross-Frame / Diaphragm definition 2D model directly and accurately to MicroStation DGN file format, including layers. Save the DGN file in the desired location and once the export is successful you can browse to file location and open/view in MicroStation.

Member Options

Press this button to see a series of options that allow control of member spacing size and other attributes in the graphic display. These options have no effect on the actual CDF being defined and only provide tools to control the display so that the overall proportions and sizes are close to exact:

Distance Between Top-- changes the distance between the two main members at the top of web in the display.
Distance Between Bottom - changes the distance between the two main members at the bottom of web in the display. (this option is currently inactive).
Default all -- sets all parameters back to their default value.
Use standard section -- If a standard section is used in the main member it can be selected from the list and its dimensions are used in the display.
Web height -- changes the web height of both girders.
Web thickness -- changes the web thickness of both girders.
Top flange width -- changes the top flange width.
Top flange thick -- changes the top flange thickness.
Bot. flange width -- changes the bottom flange width.
Bot.flange thick -- changes the bottom flange thickness.
OK -- exit and accept the changes.
Cancel - exit without saving the changes.

Custom Sections

This option allows members to be defined by user entered section properties or as a plate:

Plate	If Plate is selected enter the Thickness and Width.
General	If General is selected enter the cross section area and moment of inertia.
Add	Press Add to add the custom section to the list of available sections to be used in the cross frame definition. General Custom Sections are added to the list with name General and the area/moment of inertia in parenthesis (i.e. General(4.00/6.00). Plate Custom Sections are added to the list with name Plate and the width/thickness in parenthesis (i.e. Plate(12.00/0.50). Filler Plate Sections are added to the list with name Fill Plate and the thickness in parenthesis (i.e. Fill Plate (0.50)). An access hole can be defined by entering its height and width.
Delete	Press Delete to remove the custom section from the list of available sections.
OK	Press OK to save the changes.
Cancel	Press Cancel to exit the dialog without saving.

Frame Type

Select one of the following frame types from the drop down list to be used in the current CFD definition:

Frame X -- defines an X frame.
Frame V -- defines a V frame.
Frame inverted V -- defines an inverted V frame.
Diaphragm -- defines a diaphragm.

Struts

There are two options on how the cross frame struts will be modeled analytically:

Frame - the members will resist moment, shear and axial forces.
Truss - the members will resist axial forces only. Note that if Truss is selected that the diagonals will automatically be switched to truss

Diagonals

There are two options on how the cross frame struts will be modeled analytically:

Frame - the members will resist moment, shear and axial forces.
Truss - the members will resist axial forces only. Truss is the only option available if Struts are set to Truss.

Add CFD

Press the folder icon to create a new CFD. When the edit box appears in the CFD list accept the default name or enter a new name. Then, hit the Enter key.

Delete CFD

Delete a CFD by highlighting the CFD name in the list and press the Delete (X) button.

Top Strut

Setting	Description
Enabled	From the drop down list select Yes to include the top strut in the CDF or select No to disable (exclude) the top strut from the CFD. The default is set to Yes.
Top Left Distance	Enter the distance from the CFD top left work line to the top of the web.
Top Right Distance	Enter the distance from the CFD top right work line to the top of the web.
Begin Offset	Enter the offset distance at the beginning of the member to where the member actually begins. (Note that this setting has no effect on analysis results).
End Offset	Enter the offset distance at the end of the member to where the member actually ends. (Note that this setting has no effect on analysis results).
Section	Select the standard section or custom section from the drop down list. The standard sections are added to the bridge project using the Standard Sections List. Custom Sections are defined using the Custom Sections option defined above.
Material	Select the material to be used from the drop-down list. The materials are those shown in the material table.
Center Line Reference	From the drop down list select whether the member is oriented relative to the top, centerline or bottom.
Vertical Orientation	For angles, from the drop down list select one of the following for vertical orientation of the angle: Long leg of the angle is vertical. Long leg of the angle is horizontal. For Channels: Channel back vertical. Channel back horizontal.
Horizontal Orientation	For angles, from the drop down list select one of the following for horizontal orientation of the angle: Top leg forward. Top leg back. Bottom leg forward. Bottom leg back. For Channels: If channel back is vertical: Leg (toe) forward. Leg (toe) (back).
Net area reduction	This is a reduction factor that is applied to the gross area of the member to compensate for any holes or other factors affection the member cross section. The resulting net area is used in tension capacity calculations.

Bottom Strut

Setting	Description
Enabled	From the drop down list select Yes to include the top strut in the CDF or No to disable (exclude) the top strut from the CFD. The Default is set to Yes.
Top Left Distance	Enter the distance from the CFD top left work line to the top of web.
Top Right Distance	Enter the distance from the CFD top right work line to the top of web.
Begin Offset	Enter the offset distance at the beginning of the member to where the member actually begins. (note that this setting has no effect on analysis results).
End Offset	Enter the offset distance at the end of the member to where the member actually ends. (note that this setting has no effect on analysis results).
Section	Select the standard section or custom section from the drop down list. The standard sections are added to the bridge project using the Standard Sections List. Custom Sections are defined using the Custom Sections option defined above.
Material	Select the material to be used from the drop-down list. The materials are those shown in the material table.
Center Line Reference	From the drop down list select whether the member is oriented relative to the top, centerline or bottom.
Vertical Orientation	For angles, from the drop down list select one of the following for vertical orientation of the angle: Long leg of the angle is vertical. Long leg of the angle is horizontal. For Channels: Channel back vertical. Channel back horizontal.
Horizontal Orientation	For angles, from the drop down list select one of the following for horizontal orientation of the angle: Top leg forward. Top leg back. Bottom leg forward. Bottom leg back. For Channels: If channel back is vertical: Leg (toe) forward. Leg (toe) (back).
Net area reduction	This is a reduction factor that is applied to the gross area of the member to compensate for any holes or other factors affection the member cross section. The resulting net area is used in tension capacity calculations.

Left Diagonal

Setting	Description
Bottom Left Distance	Enter the distance in inches from the bottom left end of the member to the bottom of the web plate. This field is active for X frames only.
Top Right Distance	Enter the distance in inches from the top right end of the member to the top of the web plate.
Begin Offset	Enter the distance in inches from the beginning of the member work line to the end of the physical member. This distance is optional and has no effect on the analysis results.
End Offset	Enter the distance in inches from the end of the member work line to the end of the physical member. This distance is optional and has no effect on the analysis results.
Section	Select the standard section or custom section from the drop down list. The standard sections are added to the bridge project using the Standard Sections List. Custom Sections are defined using the Custom Sections option defined above.
Material	Select the material to be used from the drop-down list. The materials are those shown in the material table.
Center Line Reference	From the drop down list select whether the member is oriented relative to the top, centerline or bottom.
Vertical Orientation	For angles, from the drop down list select one of the following for vertical orientation of the angle: Long leg of the angle is vertical. Long leg of the angle is horizontal. For Channels: Channel back vertical. Channel back horizontal.
Horizontal Orientation	For angles, from the drop down list select one of the following for horizontal orientation of the angle: Top leg forward. Top leg back. Bottom leg forward. Bottom leg back. For Channels: If channel back is vertical: Leg (toe) forward. Leg (toe) (back).
Net area reduction	This is a reduction factor that is applied to the gross area of the member to compensate for any holes or other factors affection the member cross section. The resulting net area is used in tension capacity calculations.

Right Diagonal

Setting	Description
Top Left Distance	Enter the distance in inches from the top left end of the member to the top of the web plate.
Bottom Right Distance	Enter the distance in inches from the bottom right end of the member to the bottom of the web plate.
Begin Offset	Enter the distance in inches from the begin of the member work line to the end of the physical member. This distance is optional and has no effect on the analysis results.
End Offset	Enter the distance in inches from the end of the member work line to the end of the physical member. This distance is optional and has no effect on the analysis results.
Section	Select the standard section or custom section from the drop down list. The standard sections are added to the bridge project using the Standard Sections List. Custom Sections are defined using the Custom Sections option defined above.
Material	Select the material to be used from the drop-down list. The materials are those shown in the material table.
Center Line Reference	From the drop down list select whether the member is oriented relative to the top, centerline or bottom.
Vertical Orientation	For angles, from the drop down list select one of the following for vertical orientation of the angle: Long leg of the angle is vertical. Long leg of the angle is horizontal. For Channels: Channel back vertical. Channel back horizontal.
Horizontal Orientation	For angles, from the drop down list select one of the following for horizontal orientation of the angle: Top leg forward. Top leg back. Bottom leg forward. Bottom leg back. For Channels: If channel back is vertical: Leg (toe) forward. Leg (toe) (back).
Net area reduction	This is a reduction factor that is applied to the gross area of the member to compensate for any holes or other factors affection the member cross section. The resulting net area is used in tension capacity calculations.

OK

Press this button to save all changes and exit the dialog.

Cancel

Press this button to exit the dialog without saving changes.