Internal Diaphragm

This section defines solid internal diaphragms inside the tub girders.

Navigation: Superstructure > Bracing > Internal Diaphragm

For detailed parameter explanations, see the Internal Diaphragm Reference.

Steps

Step 1: Navigate to Internal Diaphragm

Navigate to Bracing > Internal Diaphragm in the tree view.

Internal Diaphragm navigation

Step 2: Assign Girder

Click the three-dot icon on Girder cell and select the tub girder where the diaphragm will be located.

Step 3: Define Diaphragm Locations

Internal diaphragms are placed at the same stations as external diaphragms. For this example, there are 10 internal diaphragms total (5 per girder).

Diaphragm layout

Step 4: Enter Location Parameters

Enter Skew Angle, Station, materials, and type (Pier-End or Intermediate) similar to external diaphragm values.

Step 5: Optional Settings

Modify Section Details and 3D Details tabs if desired.

Section details

3D details

Verification

The completed internal diaphragms are shown below.

Completed internal diaphragm plan

Completed internal diaphragm 3D

Completed internal diaphragm detail