/
Live Load [EX1-STG]

Live Load [EX1-STG]

Owned by mert.goktas (Unlicensed)
Last updated: Jul 27, 2023
7 min read

Please follow the instructions provided below to add design lanes.

1

To affect live loads on your bridge, you must activate them according to your standard. Note that vehicle data definitions are provided before the design lane definitions.
However, if you begin by defining a Design Lane, OpenBrIM will automatically assign the vehicle data.

2

Navigate to Live Load > Design Lane

3

Click three-dots icon on Name and click Import Design Lane to import design lanes.

4

You can import 'Design Lanes' with parameters into the OpenBrIM core memory, as in the figure.

Import all of the Design Lines indicated by the red arrow

 

 

 

 

 

5

These three parameters should be separated into substructure and superstructure categories. This means that they must be imported twice, with different names, as they take different coefficients.

  • HL93AndLane_LL(sub)

  • HL93TandemTruckAndLane_LL(sub)

  • HL93TwoTrucksAndLane_LL(sub)

We have defined 14 Design Lanes in total.

6

The incoming lane width [ft] and vehicle & lane edge [ft] data will remain constant for this project.

7

Navigate to Vehicles tab.

"The data in the Vehicles 1 column is automatically set when we define the Design Line.

 

 

8

Enter the Vehicles 1 Impact Factor values as shown in the figure.

9

You can make adjustments to the "Lane Load", “Vehicle Placemet Settings” and "Lane Placement Settings" tabs if you wish.

1

Navigate to Design Lane under Live Load on the tree view.

2

Copy Properties, Vehicles, Lane Load, Vehicle Placement Settings, and Lane Placement Settings from model inputs and paste into OpenBrIM.

Please follow the instructions provided below to add vehicle definitions.

1

Navigate to Loads > Live Load > Vehicle

2

Click three-dots icon on Name and click Import Vehicle.

3

You can use the OpenBrIM library to import the live load status of vehicles according to various standards.

 

4

All of the vehicle data is automatically imported once the Design Lane has been imported.

 

1

Navigate to Vehicle under Live Load on the tree view.

2

Copy related Dara from model inputs and paste into OpenBrIM.

Please follow the instructions provided below to add influence surface.

1

Navigate to Loads > Live Load > Infuence Surface

2

Click three-dots icon on Stage and click Select.

3

After the completion of pavement on a bridge and highway, the forces exerted by vehicles on the pavement include live load, load at braking, and centripetal force. These three states must be assigned to stages in the 'Influence Surface'.

 

 

4

Set the Stage data as in the figure.

Then enter the name of the “Influence Surface (loads)” that have been entered.

5

Click three-dots icon on Roadway and click Select

Set R1 each (Influence Surface) load.

 

6

Each defined 'Influence Surface' load has a category.

Assign the appropriate categories to them."

7

For each (Influence Surface) load, each impact surface parameter values as follows.

  • Unit Load Spacing Long. [in]: 360

  • Unit Load Spacing Trans. [in]: 72

8

Navigate to Centrifugal tab.

Enter Highway Design Speed [ft/second] data as 51.3.

 

 

9

Click on the three-dots icon on Centrifugal Force Factor and set it to 'Other Than Fatigue (1.33)' for the “ISCentr” load.

1

Navigate to Influence Surface under Live Load on the tree view.

2

Copy General, and Centrifugal from model inputs and paste into OpenBrIM.

1

Navigate to Loads > Live Load > Live Load Case

2

In this step, we define the "Live Load Cases" for which limit states will be used.

3

Select the (Influence Surface) loads that were defined in the previous step.

Then enter the name.

4

Assign Fatigue parameter of defined "Live Load Case" as in the figure.

 

5

Navigate Design Lanes tab.

 

 

6

To perform the design calculation, vehicle scenarios must be created on the roadway.

To perform this, vehicle scenarios need to be applied to the 'Live Load Cases' that were defined previous step.

 

Click three-dots icon on Design Line Option cell and click Select.

 

 

Assign the design lanes to the 'Design Lane Options' as in the figure.

1

Navigate to Live Load Case under Live Load on the tree view.

2

Copy General, and Design Lanes from model inputs and paste into OpenBrIM.

 

Vehicle

Vehicle

Data

HL93DesignTruck 1.0000 72.0000 HL93DesignTandem 1.0000 50.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTruckFatigue 1.0000 72.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTandem 1.0000 50.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTandem 1.0000 50.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTandem 1.0000 50.0000 HL93DesignTruck 1.0000 72.0000 HL93DesignTandem 1.0000 50.0000 HL93DesignTruck 1.0000 72.0000

Design Lane

Design Lane

Properties

Vehicles

Lane Load

Vehicle Placement Settings

Lane Placement Settings

HL93AndLane_LL 12.0000 1.0000 HL93TandemTruckAndLane_LL 12.0000 1.0000 HL93TwoTrucksAndLane_LL 12.0000 1.0000 HL93_Fatigue 12.0000 1.0000 HL93AndLane_Deflection 12.0000 1.0000 HL93_BR 12.0000 1.0000 HL93Tandem_BR 12.0000 1.0000 HL93AndLane_BR 12.0000 1.0000 HL93TandemAndLane_BR 12.0000 1.0000 HL93_CE 12.0000 1.0000 HL93TandemTruck_CE 12.0000 1.0000 HL93AndLane_LLsub 12.0000 1.0000 HL93TandemTruckAndLane_LLsub 12.0000 1.0000 HL93TwoTrucksAndLane_LLsub 12.0000 1.0000
HL93AndLane_LL HL93DesignTruck 1.3333 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TandemTruckAndLane_LL HL93DesignTandem 1.3333 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TwoTrucksAndLane_LL HL93DesignTruck 1.1970 Both HL93DesignTruck 1.1970 Both (None) 1.0000 Both (None) 1.0000 Both HL93_Fatigue HL93DesignTruckFatigue 1.1500 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93AndLane_Deflection HL93DesignTruck 0.3325 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93_BR HL93DesignTruck 0.2500 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93Tandem_BR HL93DesignTandem 0.2500 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93AndLane_BR HL93DesignTruck 0.0500 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TandemAndLane_BR HL93DesignTandem 0.0500 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93_CE HL93DesignTruck 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TandemTruck_CE HL93DesignTandem 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93AndLane_LLsub HL93DesignTruck 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TandemTruckAndLane_LLsub HL93DesignTandem 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both (None) 1.0000 Both HL93TwoTrucksAndLane_LLsub HL93DesignTruck 0.9000 Both HL93DesignTruck 1.1970 Both (None) 1.0000 Both (None) 1.0000 Both

Influence Surface

Influence Surface

General

Centrifugal

Live Load Case

Live Load Case

General

Design Lanes