Reactions

 

 

 

Trace and graphically display the vehicle loading condition (corresponding moving load case and location) that results in the maximum/minimum reaction of a support. The loading condition is converted into a static loading and produced as a model file of the MCT type. This is an extremely useful feature when we wish to find the loading condition that creates the maximum or minimum reaction.

 

 

 

From the Main Menu select Results > Moving Load > Moving Tracer > Reactions.

 

 

Moving Load Cases

Select a moving load case (vehicle type) that is to be traced and located at a position satisfying the max/min reaction.

Key Node: Enter a support node number, or click the entry field and the desired support in the working window.

Scale Factor: Enter the drawing scale factor for the influence line/surface. This does not affect the influence line/surface values.

Components

Assign a desired reaction component.

Fx: Reaction component in GCS X-direction

Fy: Reaction component in GCS Y-direction

Fz: Reaction component in GCS Z-direction

Mx: Moment reaction component about GCS X-axis

My: Moment reaction component about GCS Y-axis

Mz: Moment reaction component about GCS Z-axis

Local (if defined): Where a node's local coordinate system is defined, the result is produced with respect to the node's local coordinate system.

Type of Display

Assign the type of display.

Contour

Display the contour of the influence line/surface together with the vehicle loading condition.

 

Ranges: Define the contour ranges.

: Assign the color distribution range of contour. Using the function, specific colors for specific ranges can be assigned.

Number of Colors: Assign the number of colors to be included in the contour (select among 6, 12, 18, 24 colors)
 

Colors: Assign or control the colors of the contour.

Color Table: Assign the type of Colors.

: Control the colors by zones in the contour.

Reverse Contour: Check on to reverse the sequence of color variation in the contour.

Contour Line: Assign the boundary line color of the contour.

Element Edge: Assign the color of element edges while displaying the contour.
 

Contour Options: Specify options for contour representation.

Contour Fill

Gradient Fill: Display color gradient (shading) in the contour.

Draw Contour Lines: Display color boundaries in the contour.

Draw Contour Line Only
Display only the colored boundaries of the contour.

Mono line: Display the boundaries of the contour in a mono color.

Contour Annotation
Legend or annotation signifying the ranges of the contour is displayed.

Spacing: Specify the spacing of the legend or annotation.

Coarse Contour (faster) (for large plate or solid model)
Represent a simplified contour for a large model using plate or solid elements in order to reduce the time required to represent a complete contour.

Extrude
Where plate elements or solid elements along a cutting plane are represented in contour, a three dimensional contour is created. The positive direction of the analysis results is oriented in the z-axis direction of the local element coordinate system.
The option is not concurrently applicable with the Deformed Shape option. Similarly, the option cannot be concurrently applied to the cases where the Hidden option is used to display plate element thicknesses or the Both option is used to represent Top & Bottom member forces (stresses).

 

Legend

Display various references related to analysis results to the right or left of the working window.

 

Legend Position: Position of the legend in the display window

 

Applied Loads

Graphically display the vehicle load condition for which the analysis results in the max/min reactions.

 

Set a detail display condition for the vehicle load case.

Load Scale Factor: Enter the drawing scale factor for the load representation

Load Values: Option to display the load values

Include Impact Factor

Reflect the impact factor in the display.

 

Include

Psi Factor

This is a display option which does not affect the results but allows users to see the Moving Tracer with and without the Psi factors applied for relevant loads, This option is related to Moving Load Cases with Ignore Psi Factor option checked off and will have no effect on Load Cases with Ignore Factor checked on.

 

Maximum Value

Produce the maximum or minimum value calculated from the moving vehicle load analysis.

: Where Influence Line or Influence Surface analysis has been carried out, the moving load case, which produces the maximum or minimum results, is converted into a static loading and produced as an MCT type.

         Moving Load Converted to Static Load

When Eurocode or BS is selected for Moving Load Code

When AASHTO LRFD or PennDOT is selected for Moving Load Code

Detailed Results

Produce Produces a text file detailing the calculation of HA Lane Factors for the current moving load tracer. The report will apply different factors depending on the type of HA vehicle defined and the options chosen by the user as explained below.

HA Lane Factor: BD 37/01 – Lane factors (LF) computed as described in clause BD37/01 Table 14 with adjustment factor (AF) and reduction factor (K) set to 1.

HA Lane Factor: BD 21/01 – Lane factor (LF) applied as given in clause BD21/01 5.24 with adjustment factor (AF) and reduction factor (K) set to 1 as default. If Additional Data option is checked on in the vehicle definition, the values of adjustment factor (AF) and reduction factor will be computed according to clause BD21/01 5.23 and Figure 5.2 to 5.7 respectively.

 HA Lane Factor: User-defined – Lane factors (LF) are at default as given in clause BD21/01 5.24 unless modified with adjustment factor (AF) and reduction factor (K) set to 1 as default. If Additional Data option is checked on in the vehicle definition, the values of adjustment factor (AF) and reduction factor (K) will be computed according to clause BD21/01 5.23 and Figure 5.2 to 5.7 respectively.

 

Revision of Civil 2014

Note. Auto-generation of centrifugal forces as per EN1991-2:2003

Centrifugal force due to vehicle load in the horizontally curved bridge can be generated  as a static load by selecting "Centrifugal Forces" option.

Following vehicle types are supported:

Road Bridge: Load Model 1 Standard and user-defined vehicle

Railway Bridge: Standard Vehicle – LM71, SW/0, SW/2, Unloaded Train

                             User Defined Vehicle – LM71, SW/0, SW/2, Unloaded Train

Characteristic value of centrifugal forces are automatically calculated as per EN1991-2:2003, clause 4.4.2 and 6.5.1.

 

File Name

Enter the file path and name of the MCT file to be output.