Please follow the instructions provided below to set boundary conditions for each bearing location (insertion point) that you have defined while creating the bridge layout.
| 1 | Navigate to Superstructure > Boundary Conditios > Bearing Fixity |  |
| 2 | Select the first cell in the "Insertion Point" column, and then click on the "Pick" button in the resulting window. | |
| 3 | Choose the insertion points that will define the boundary conditions for the superstructure. For each location, specify the fixities or stiffness values based on the bearing types in the Tx, Ty, and Tz directions. Select the insertion points for each bearing. |  |
| 4 | Set Tx/Ty/Tz/Rx/Ry/Rz as in the figure.
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| 5 | Set Transfer Force to Substructure as Yes for all bearing locations. If you do not model the substructure, such as abutment locations, it is necessary to select "Transfer Substructure" as "No." On the other hand, selecting "Yes" is important when substructures are modeled at bearing locations. | |
| 6 | In this section, nodes are assigned degrees of freedom (DOFs). The coordinate system of each insertion point varies along the support line and alignment. Based on this updated coordinate system, new DOFs need to be allocated. Tx/Ty/Tz/Rx/Ry/Rz fixities are shown below.
-20221022-132407.png?version=1&modificationDate=1691047885854&cacheVersion=1&api=v2)
Bearing Rotation parameter rotates the support clockwise in the XY plane. 
FE behaviour of Transfer Force to Substructure. 
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Follow the below steps to copy and paste all inputs from our data set.
Navigate to Bearing Fixity under Boundary Conditions on the tree view. |
Copy Articulation from model inputs and paste into OpenBrIM. |
Completed Bearing Fixity is illustrated below.
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 . 
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Bearing Fixity |
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Articulation |
BF1 IP1 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF2 IP2 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF3 IP3 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF4 IP4 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF5 IP5 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF6 IP6 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF7 IP7 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF8 IP8 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF9 IP9 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF10 IP10 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF11 IP11 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF12 IP12 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF13 IP13 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF14 IP14 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF15 IP15 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF16 IP16 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF17 IP17 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF18 IP18 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF19 IP19 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF20 IP20 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF21 IP21 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF22 IP22 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF23 IP23 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF24 IP24 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF25 IP25 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF26 IP26 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF27 IP27 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF28 IP28 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF29 IP29 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF30 IP30 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF31 IP31 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF32 IP32 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF33 IP33 10.0000 10.0000 Fixed Free Free Free 0.0000 YES BF34 IP34 10.0000 10.0000 Fixed Free Free Free 0.0000 YES |
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