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

Expand
titleLive Load Case
Live Load Case (Highway) [SIG]
1

🖱️ Click the three-dots icon on the Influence Surface cell, and then set ISGravity.

image-20240930-103620.png

2

🖱️ Keep the Influence Surface 2, Influence Surface 3, Influence Surface 4 and Max for Stress Range as default.

image-20240930-103718.png

3

🖱️ Click three-dots icon on Multiple Presence Factor and click Edit.

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4

🖱️ Please enter the following values sequentially:
1st row - Factor: 1.2
2nd row - Factor: 1
3rd row - Factor: 0.85
4th row - Factor: 0.65

5

🖱️ Keep the Maximum Number of Lanes as default.

image-20240930-103807.png

6

You can edit the Design Lanes of live load case from Design Lanes tab.

🖱️ Click three-dots icon on Design Lane Option 1 cells and select a Design Lane as HL93AndLane_LL.

If you have reached this stage and you don't have a design lane to select, and if you want to use the Import Button, you can refer to the Quick Tip.

image-20240930-103843.pngimage-20240930-104425.png
7

Insert excerpt
_Quick Tips
_Quick Tips
nameImportDesignLane
nopaneltrue

8

🖱️ Click three-dots icon on Design Lane Option 2 cells and select a Design Lane as HL93TandemTruckAndLane_LL.

image-20240930-103930.png

9

🖱️ Click three-dots icon on Design Lane Option 3 cells and select a Design Lane as HL93TwoTrucksAndLane_LL.

image-20240930-104003.png

10

🖱️ Keep the Design Lane Option 4 and Magnification Factors tabs parameters as default.

image-20240930-104029.png

image-20240930-104100.png

11

🖱️ Set name as LLHL93Case.

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12

To model all the live load case, 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.

Insert excerpt
_Quick Tips
_Quick Tips
nameCopyPasteInputs
nopaneltrue

Live Load Case

General

Code Block
LLHL93Case	ISGravity	NULL	NULL	NULL	NO	[1.2,1,0.85,0.65]	No Limit
LLFatCase	ISGravity	NULL	NULL	NULL	YES	[1]	1 Lane
LLBrakingCase	ISBraking	NULL	NULL	NULL	NO	[1.2,1,0.85,0.65]	No Limit
LLCentCase	ISCentr	NULL	NULL	NULL	NO	[1.2,1,0.85,0.65]	No Limit

Design Lanes

Code Block
LLHL93Case	HL93AndLane_LL	HL93TandemTruckAndLane_LL	HL93TwoTrucksAndLane_LL	NULL
LLFatCase	HL93_Fatigue	NULL	NULL	NULL
LLBrakingCase	HL93_BR	HL93AndLane_BR	NULL	NULL
LLCentCase	HL93_CE	NULL	NULL	NULL

Anchor
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Tip

The completed live load cases 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.

image-20240930-121932.pngimage-20240930-122018.png
Tip

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

SIG EX1 Live Load CasesCase.mp4