| Load Name
|
Enter the name of the live load case. This name
will be used in all subsequent display and reporting activities.
|
| Side-by-Side Option
|
By default this option is set to None. If the drop
down list is selected the list if live loads from the Locked Library Loads
appears. Select the load from the list that will represent the side-by-side
vehicle. See Description of Side-by-Side analysis for more details on how this
analysis is performed for grillage and line girder analysis.
|
| Use axle loading
|
Check this option to perform live load grillage
analysis using axle loading. In axle loading the individual wheel loads on each
axle are summed to a single load that is assumed to act at the vehicle
centerline when applied to the influence surface
|
| Use wheel loading
|
Check this option to perform live load grillage
analysis using wheel loading. In wheel loading each wheel load acts at its
defined position on the axle when applied to the influence surface.
|
| Centrifugal force input
|
- Enter design speed
for the highway.
- Check the box if
live load is going be used in fatigue load cases.
|
| Include Lane Load
|
Check this box if the lane load is to be considered
in the live load analysis. If Include Lane is not checked, the Include Lane
Column will be blanked out. Note that only one lane load is allowed in a live
load description.
|
| Lane Intensity (k/ft)
|
This field displays the value of the lane load that
is included in the live load definition for convenience.
|
| Add Load
|
Press to add a live load (lane or vehicle) to the
live load definition
|
| Copy Load
|
Press to copy the currently selected load. The
current load in the list is designated by the
|
| Delete Load
|
Press to delete the currently selected load
designated by
|
| Edit Vehicle Library
|
Press to access the vehicle Library. All vehicles
are added and/or otherwise edited through the vehicle library. See the Vehicle
Library section for more information.
|
| Grid Items
|
| Setting | Description |
|---|
| Class Type
|
When the Add Load button is pressed the load
is added to the grid. The Class Type column specifies the class of load. The
selections are:
- Design lane
- Design Tandem
- Design Truck
- Double Tandem
- Double Truck
- Permit
Vehicles
- Legal
Vehicles
|
| Truck Name
|
If the previously selected Class Type includes
trucks, the list of trucks for the class from the vehicle library will appear.
Select the desired truck. The axle information will appear in the lower grid.
|
| Include Lane
|
Toggle the button to Yes if lane load is to be
included with the selected truck in the analysis. The lane load column will
only be active if a lane load has been added to the load list.
|
| Notional
|
Specifies that the vehicle is notional. When
notional vehicles are used in the analysis process any axle that does not
contribute to the maximum effect being calculated, it is excluded.
|
| Special Envelope
|
Toggle the button to activate special over
the pier analysis as part of the live load process. The selected truck will be
used in negative moment regions between points of contra-flexure adjacent to
interior piers.
|
| Special Env Fac
|
This field is only active if Special Envelope
is set to Yes. An optional factor can be entered that will be used to factor
the results of the special envelope analysis.
|
|
| OK
|
Press OK to save the live load definition and exit
the dialog.
|
| Cancel
|
Press Cancel to exit the dialog without saving the
data.
|
