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After clicking on ‘Loading> Loads> Inf. Surf Based LL/BR/CE> Influence Surface' in the navigation treeview, follow the steps to define the Influence Surface. You can use the collapsed documentation page below for more information on the explanations of each parameter.

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titleInfluence Surface
Influence Surface (Highway) [SIG]

1

🖱️ Click three-dots icon on Stage cell and select a Construction Stage as LLStage.

image-20240930-101208.pngimage-20240930-101247.png
2

As a result of these operations, an issue will appear on the OpenBrIM screen. This does not necessarily mean that any operation was done incorrectly. The issue will be resolved when the roadway is define in the next step.

3

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4

🖱️ Click the three-dots icon on the Roadway cell, and then set R1.

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5

🖱️ Keep the Live Load Category, Unit Load Spacing Long. and Unit Load Spacing Trans. and Direction as default.

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6

🖱️ Keep the Centrifugal parameters as default.

7

🖱️ Set name as ISGravity.

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8

To model all the influence surface, copy the data below and paste the parameters into the first cell in OpenBrIM spreadsheet. Refer to the quick tip for an easy guide on how to perform the copy operation. After completing the copy, proceed to the next step to verify the model.

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Influence Surface

General

Code Block
ISGravity	LLStage	R1	Gravity	360.0000	72.0000	Along PGL
ISBraking	BRStage	R1	Braking	360.0000	72.0000	Along PGL
ISCentr	CentStage	R1	Centrifugal	360.0000	72.0000	Along PGL

Centrifugal

Code Block
ISGravity	N/A	N/A
ISBraking	N/A	N/A
ISCentr	51.3000	Other than Fatigue(1.33)

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Tip

The completed influence surfaces are illustrated below. Please verify that you have the same model on your end by examining each view provided here. For more information on how to perform visual checks, refer to the quick tips.

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Tip

To view the entire procedure explained on this page, please watch the recorded Video below.

20231017180008SIG EX1- Influence Surface.mp4