_Quick Tips

When encountering the warning as seen in OpenBrIM app, there is a "issue" , it is advised to review the parameters you have provided. This warning suggests that there might be a missing or incorrect parameter in your input. Check inputs to ensure they are accurate and complete.

When a warning is clicked, the reason can be displayed. The warning is expressed in the format of Component Group Name (can be viewed in the treeview) > User Defined Component Name (can be viewed in the spreadsheet name column) > Parameter Name (can be viewed in the spreadsheet column header).

After clicking on 'Superstructure > Connections > Bolted Field Splice' in the tree view, navigate to the Bolt category. Set the Bolt Property input. The issue will be resolved after these steps.

The screenshot demonstrates one example of two Bolted Field Splice components named BFS1 and BFS2 by the user, with parameter names Flange Bolt Property and Web Bolt Property.

If there is no material to be set, follow the steps below:

- Click the three dots on the cell and select Import Material.

- In the opened window, choose the material.
- Click the Import button.

If there is no section to be set, follow the steps below:

- Click the three dots on the cell and select Import Section.

- In the opened window, choose the section.
- Click the Import button.

It is important to use the same name for every parameter that is given throughout this example in order to eliminate possible typo or user error. If you choose to use a different naming convention, please be aware to utilize exactly the same name throughout the workflow.

Using space character is not allowed in the spreadsheet cells in order to eliminate possible typo or user error.

In the horizontal tab, bridge definitions can be made as straight, circular, and transitional.

You can edit the Vertical data such as grades and elevations of alignment in the Vertical tab.

Left Edge to PGL is the length from the left edge to the centerline of the alignment.

You can edit the Transverse data such as width and slope of alignment in the Transverse tab.

If 3D Bridge Alignment doesn’t show up in the Graphics Window, either click Zoom Extends on the right or Show Roadway Surface from the Settings.

Click on the arrow button above the Analysis button located in the upper-left corner of the OpenBrIM screen.

Click on the Model button on the screen that opens up.

Click on the arrow button above the Analysis button located in the upper-left corner of the OpenBrIM screen.

Click on the FEA button on the screen that opens up.

Click on the arrow button above the Analysis button located in the upper-left corner of the OpenBrIM screen.

Click on the CAD button on the screen that opens up.

Copy the desired data with the automatic copy button in the upper left corner.

Click on the first cell in and use the Ctrl+V shortcut to paste.

If icon won’t appear, collapse page tree menu by clicking on arrow or using shortcut “[”.

While pasting large data, it would be handy to turn of Auto-refresh .

Offset values use PGL as the reference point.

Offset values use PGL as the reference point.

In this part, dofs are assigned to nodes. The coordinate system of the each insertion point changes along the support line and alignment. According to this new coordinate system, new dofs should be assigned.

Tx/Ty/Tz/Rx/Ry/Rz fixities are shown below.

Bearing Rotation parameter rotates the support clockwise in the XY plane.

FE behaviour of Transfer Force to Substructure.

For example, if the Insertion Point has a skew angle as 30°, Shear Stud Start and End Stations should be updated by multiplying with the sinus of the skew angle.

Skew Angle parameter rotates the the unskewed line which is perpendicular the PGL.

The barrier material should be defined as "no stiffness" for barrier objects. It is not intended for the barrier object to carry loads like a beam, but a low elastic modulus material is defined to consider the effect of wind force.

Longitudinal Offset = It offsets the foundation along the alignment.

Transverse Offset = It offsets the foundation on the y-axis perpendicular to the alignment.

Rotation = It rotates the XY plane.

In Staged Construction Analysis, when joints are activated they normally enter at the location that was initially given to them. Joints sometimes need to become active in a location relative to the deformed structure of the model, rather than in an exact position known ahead of time.

The construction method option of construction stages specifies how to place a joint relative to the deformed location of other joints.

In Steel I Girder Bridges, deck formwork deforms and follows girder displacements. Therefore deck nodes should be constructed by shifting the node down to match the translational displacement of the girders nodes. This can be achieved with the Construction Method = Equal option of construction stages.

For the Composite Section parameter refer to AASHTO(2020) 6.10.1.1.1-Stresses.

The modular ratio should be taken as = n = E/Ec, where Ec = modulus of elasticity of the concrete.

Short term and long term applications depends on the sequence of loading which results in the stress at the section.

Per AASHTO(2020) 6.10.1.1.1b—Stresses for Sections in Positive Flexure

For transient loads assumed to be applied to the short-term composite section, the concrete deck area shall be transformed by using the short-term modular ratio, n. For permanent loads assumed applied to the long-term composite section, the concrete deck area shall be transformed by using the long-term modular ratio, 3n. Where moments due to the transient and permanent loads are of opposite sign at the strength limit state, the associated composite section may be used with each of these moments if the resulting net stress in the concrete deck due to the sum of the unfactored moments is compressive. Otherwise, the provisions of Article 6.10.1.1.1c shall be used to determine the stresses in the steel section. Stresses in the concrete deck shall be determined as specified in Article 6.10.1.1.1d.

Click on the arrow button above the Analysis button located in the upper-left corner of the OpenBrIM screen.

Click on the FEA button on the screen that opens up.

Click on the first button on the screen that opens up and Click on the Loading button.

Click on the third button and in the opened window, select the construction stage for which you want to see the loading.

If there is no design lane to be set, follow the steps below:

- Click the three dots on the cell and select Import Design Lane.

- In the opened window, choose the design lane.
- Click the Import button.

Click on the arrow button above the Analysis button located in the upper-left corner of the OpenBrIM screen.

Click on the FEA button on the screen that opens up.

Click on the first button on the screen that opens up and Click on the Loading button.

Click on the second button and in the opened window, select the case for which you want to see the loading.

Click on the third button and in the opened window, select the degree for wind load for which you want to see the loading.

If there is no limit state to be set, follow the steps below:

- Click the three dots on the cell and select Import OBPAASHTOLimitState.

- In the opened window, choose the limit state.
- Click the Import button.

If you have made changes to an analyzed model and click the button to perform the analysis again, the question shown below will be asked. You can either continue with the saved old analysis results or click the analysis button again to update the analysis results.

If you have made changes to an designed model and click the button to perform the design again, the question shown below will be asked. You can either continue with the saved old design results or click the design button again to update the design results.