External Diaphragm
This section defines external diaphragms that connect adjacent tub girders.
Steps
Step 1: Navigate to External Diaphragm
Navigate to Bracing > External Diaphragm in the tree view.
Step 2: Select Girders
Click the three-dot icon on Girders cell and pick both tub girders (G1 & G2) between which the external diaphragm will be placed.
Step 3: Define Diaphragm Locations
Create 5 external diaphragms with appropriate station values and skew angle = 0.
Step 4: Set Diaphragm Types
Assign Pier-End type for the first 4 rows (at support locations)
Assign Intermediate type for the last row (mid-span location)
Step 5: Configure Pier/End References
Click the three-dot icon on Select Pier/End cell and pick the appropriate support locations. Enter station = 260 for the intermediate diaphragm.
Step 6: Set Offset Values
Enter Offset from Pier/End values as required.
Step 7: Assign Material
Click the three-dot icon on Material cell and assign A709_50W to all external diaphragms.
Step 8: Optional Settings
Modify Section Details and Stiffener tabs if desired.
Verification
The completed external diaphragms are shown below.
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