Add New Vehicle Definitions dialog
Used to define different types of moving loads. Several load cases can be generated by applying these types of loads.
Opens when the Vehcile tool is selected in the Define Load Systems group on the Loading ribbon tab.
In order to generate a set of static loads, due to the movement of the vehicle or load on the structure, there are two steps involved. The first step is to define the vehicle. The second step involves the Moving Load Generator.
Define Load tab
Used to define a moving load system in the input file.
| Setting | Description |
|---|---|
| Vehicle Type Ref |
This is the reference number. |
| Width |
Specify a wheel spacing, if applicable. The Width is the spacing between loads perpendicular to the direction of movement. If omitted, one directional loading is assumed. |
| Load, Dist table |
Enter the value of the concentrated loads and the distance between them. The first load is used as the Reference load for vehicle placement in the (Moving) Load Generation Type dialog. |
AASTHO Spec tab
Used to specify a standard AASHTO load in the input file.
| Setting | Description |
|---|---|
| Vehicle Type Ref |
This is the reference number. |
| AASHTO Specification |
Choose from the following standard AASHTO loading: HS20, HS15, H20 and H15. |
| Factor |
Specify a multiplying factor, if applicable. The default factor is 1.0. |
| Variable Spacing |
(For use with HS loads only) Specify a value for a variable wheel spacing between the second and third axles, per Fig. 3.7.7A of AASHTO Standard Specification or Cl. 3.6.1.2.2 of the AASHTO LRFD. Valid range from 14 feet to 30 feet (inclusive), with the default being 14 feet if not specified. |
File Input tab
Used to specify a moving load defined in an external file.
| Setting | Description |
|---|---|
| Vehicle Type Ref |
This is the reference number. |
| File Name |
Name of the external file containing moving load data. File name should be limited to 16 characters, reside in the same directory as the current input and have no file extension. For more information on creating an external moving load file, see TR.31.1 Definition of Moving Load System. |
| Load Name |
Name assigned to the moving load system in the external file. |
| Factor |
Specify a multiplying factor, if applicable. |