Bridge Continuous Girder

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General Information Concrete slab with continuous girders

The Concrete Slab with Continuous Girdersextension is designeg to define a 3D model of a concrete slab with

continuous girders bridge in Revit or in AutoCAD Civil 3D.

Workflow: Generate Concrete slab with continuous girders bridge in Revit

This workflow describes a typical method of generating a concrete slab with continuous girders bridge in Autodesk

Revit.

1. Open the project with road in Autodesk Revit.

2. Select Extensions tab Autodesk Revit Extensions panel Civil Structures drop-down Bridge -

Concrete slab with continuous girders.

3. On the Bridge Layout tab Specify the Abutments and Piers location.

4. On the Deck tab Specify the bridge deck geometry.

5. On the Roadway tab Specify the roadway geometry.

6. On the Barriers tab Specify the bridge barriers geometry.

7. On the Girder sets tab Specify the number and distribution of the girders.

8. On the Girder type tab Specify the girders geometry.

9. On the Bearings tab Specify the bearings and bearing seats geometry.

10. On the Abutments tab Specify the abutment geometry.

11. On the Piers tab Specify the piers geometry.

12. Click OK.

Workflow: Generate Concrete slab with continuous girders bridge in AutoCAD

Civil 3D

This workflow describes a typical method of generating a concrete slab with continuous girders bridge in Autodesk

AutoCAD Civil 3D.

1. Open the source corridor in AutoCAD Civil 3D.

2. Select Bridge Modeler tab Bridge - Concrete slab with continuous girders.

3. On the Road definition window Select the part of the corridor to the generation of bridge4. Click OK to open Bridge - Concrete slab with continuous girderswindow.

5. On the Bridge Layout tab Specify the Abutments and Piers location.

6. On the Deck tab Specify the bridge deck geometry.

7. On the Roadway tab Specify the roadway geometry.

8. On the Barriers tab Specify the bridge barriers geometry.

9. On the Girder sets tab Specify the number and distribution of the girders.

10. On the Girder type tab Specify the girders geometry.


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11. On the Bearings tab Specify the bearings and bearing seats geometry.

12. On the Abutments tab Specify the abutment geometry.

13. On the Piers tab Specify the piers geometry.

14. Click OK.


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Road Selection

Road Selection in Revit

The designed bridge is generated based on a selected road segment in Revit.

To define a new bridge begin by selecting a road, before using the BridgeConcrete slab with continuous girders

extension.

To generate a new road in Revit you can use the Roads and Terrain extension first. To open Roads and Terrain

extension : Select Extensions tab Autodesk Revit Extensions panel Civil Structures drop-down Roads

and Terrain.

Road Selection in AutoCAD Civil3D

The designed bridge is generated based on a selected corridor in AutoCAD Civil 3D.

To define a new bridge begin by selecting a road using the Road definition dialog. It opens automatically when you

start BridgeConcrete slab with continuous girdersextension.

In the dialog you can set road parameters for the definition of a bridge:


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Corridor: drop-down list contains existing corridors in the project; you can choose the one on which

the bridge will be defined.

Base line: drop-down list contains alignments available for the selected corridor; you can choose

the main horizontal alignment of the road.

Alignment: displays the name of the selected horizontal alignment.

Profile: displays the name of the profile (vertical alignment) along the horizontal alignment.

Region: drop-down list contains regions available for the selected corridor; you can choose the one

on which the bridge will be defined.

Terrain profile: drop-down list contains available terrain vertical profiles; you can select the vertical

profile which will be used for a bridge definition.

Road left border point code: drop-down list contains available point codes used to generate road

surface (codes specify the edge of the traveled way).

Road right border point code: drop-down list contains available point codes used to generate road

surface (codes specify the edge of the traveled way).

Road sections to display: value used for the accuracy of the representation of road in the graphicswindow of the bridge module.

Use the command OKto define a new model of a bridge and open Bridge DefinitionConcrete Slab with Girders

dialog.


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Concrete Slab with Continuous

Girders dialog

Using the Bridge DefinitionConcrete Slab with Continuous Girders dialog you can define bridge elements and

then specify their parameters. You can also arrange bridge elements in the overall bridge design.

Define bridge elements using the 3 panes in the dialog:

1. The menu toolbar:

Fileperform common tasks with project files.

Help open the on-screen help for the extension or display information about the software.

Optionsopen a window with additional settings of the program

Validateverify whether the defined parameters are correct.

2. On the pane at the left, use the tabs to select bridge elements for further definition:

Data

Bridge Layout

Superstructure

Roadways

Decks

Barriers

Girder sets

Girder type

Substructure

Bearings

Abutments

Piers

3. The Viewpane at the upper right displays the designed bridge element or the whole bridge.


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Validation

Verification of the model is run automatically before generation of the bridge model. You can also run the

verification manually from the top menu - command Validate.

If during the verification errors are found, an error list window is displayed.

Errors describe geometric problems, preventing generation of the bridge model.

Options

Optionwindow contains additional program settings grouped into particular categories:

o General settings:

Parameters descriptionallows you to choose whether you want to see full descriptions of

variables, or just their symbols.

Length unit allows you to select a non-default units for dimensions.

Angle unit allows you to select a non-default units for angles.

o Road:

Generation densityallows you to change the density parameter, affecting the number of sections

used in the generation of road solids.

Family nameallows you to change the default name for generated road families (available only in

Revit version).

o Deck:


used in the generation of deck solids.

Family nameallows you to change the default name for generated deck families, (available only in

Revit version).

o Left Barrier:


used in the generation of left barrier solids.

Family nameallows you to change the default name for generated left barrier families, (available

only in Revit version).

o Right Barrier:


used in the generation of right barrier solids.

Family nameallows you to change the default name for generated right barrier families, (available


o Abutment:

Family nameallows you to change the default name for generated abutments families, (available


o Pier:


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Family nameallows you to change the default name for generated piers families. , (available only

in Revit version).

o Bearing seat:

Family nameallows you to change the default name for generated bearing seats families,

(available only in Revit version).

o Girder:

Family nameallows you to change the default name for generated girders families, (available only

in Revit version).


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Bridge definition

Bridge Layout

Use the Bridge Layout tab to define geometric parameters of a bridge.

The road top view displays in the viewer (Graphic view). The abutments and piers coordinates display in the table

below.

You can specify the number and location of abutments and piers that support the bridge.


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Graphic view

The horizontal alignment and the locations of abutments and piers are displayed in the viewer .

All lines are marked with colors and are described in the legend.

Using the Viewmenu in the viewer, you can zoom and specify whether to show the legend. It is also possible tozoom using the mouse scroll button.

All commands of the Viewmenu are also available by right-clicking the viewer.

Abutments table

The parameters of the defined abutments are displayed in theAbutmentspane of the table.

After you load the selected road segment, the software automatically generates abutments near the points where

the first and the last road cross sections are defined.

The individual abutments are displayed in the table rows. The columns allow you to specify the following

parameters:

Indexnumber of an element. This value is automatically defined by the software and cannot be

modified.

Stationcoordinate value of the abutment location (distance between the abutment and the start

point of the horizontal alignement) in meters. You can select a value from the list or enter a new

value.

Skew angleangle (from -60 to 60) between the abutment axis and the line perpendicular to the

horizontal alignment

Azimuthazimuth of the abutment axis

Ground elevationheight ordinate of ground level in the point of the abutment location.

PGL to ground distanceoffset between the terrain and the road axis (PGL) at the point of the

abutment location. This value is defined based on the Ground elevationand the geometry of the

bridge slab, and cannot be modified.

If you modify the abutment location coordinate, then the designed bridge lenght (the road segment where the

bridge will be generated) is cut.

Piers table

The parameters of the defined piers are displayed in the Pierspane of the table.

After you load the selected road segment, the software automatically generates piers between the abutments.

The individual piers are displayed in the table rows. The columns allow you to specify the following parameters:


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Indexnumber of an element. This value is automatically defined by the application and cannot be

modified.

Stationcoordinate value of the pier location (distance between the pier and the start point of the

horizontal alignment) in meters. You can select a value from the list or enter a new value.

Skew angleangle (from -60 to 60) between the pier axis and the line perpendicular to the

horizontal alignment.

Azimuthazimuth of the pier axis

Ground elevationheight ordinate of ground level at the point of the pier location.

PGL to ground distanceoffset between the terrain and the road axis (PGL) at the point of the pier

location.. This value is defined based on the Ground elevationand the geometry of the bridge slab,

and cannot be modified.

Use the buttons below the table to work with piers:

Addadd a pier. The new pier will be added midway between the active and the subsequent piers.

Remove

remove the selected pier.

Clearremove all defined piers.

Arrangearrange all defined piers or place a set of new piers; Operating mode of this button

depends on the selection in the list on the right:

o Arrange existing piersuse to arrange all defined piers with the same distance between

the piers.

o Place specified number of piersuse to define specified number of piers and arrange all

new piers with the same distance between.

o Place piers at approximate distancesuse to define and arrange new piers with the

specified distance between the piers.


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Decks

The Deckstab allows you to define the cross section of the brigde slab with haunches.

You can select the haunch category from the Haunch list. The dimensions of the selected deck and haunch can be

modified using the Dimensionsand Haunchpanes.


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Select the haunch cross section type:

Straightsupporting element with vertical lateral walls.


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Anglesupporting element with sloped lateral walls.

Angle and straightsupporting element with sloped and vertical lateral walls.

Under Dimensions, you can define the slab thickness and width. To define the slab width, you need to specify the

left and right offset between the road and slab edges.

Note: Edges of the road are marked on the screen as red points (1 and 2).

Under Haunch,you can define parameters of haunch geometry .

The image displays graphic representation of the defined parameters of the slab geometry for the selected

category in the Haunch field.


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In the current version of the software one roadway type is available:

Constant height roadway

Under Dimensions, you can define the parameters of roadway geometry.

The image displays graphic representation of the defined parameters of the roadway geometry for the selected

category in the Roadway field.


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Barriers

The Barrierstab allows you to select a bridge barrier type and define its parameters.

Depending on the option Symmetrical barriers You can define the same barriers on both sides of the bridge or

define the barriers for each bridge side separately using Barrier Leftand Barrier Right.

Note: The bridge side orientation (left/right) is defined in the direction of increasing horizontal alignment

coordinates.


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Select a type of the barrier:

Perpendicularbarrier perpendicular to the slab surface

Verticalvertical barrier (base is adjusted to the slab slope)


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Select a shape of the barrier:

Basicrectangular shape; available for Perpendicular and Vertical barrier type

Parapetavailable for Perpendicular barrier type

New Jerseyavailable for Perpendicular barrier type

F-shapeavailable for Perpendicular barrier type

Under Dimensions, you can define the geometry parameters of the selected barrier cross section.

The image displays graphic representation of the defined parameters of the barrier geometry for the selected

category in the Shapefield.


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Girder sets

The Girder sets tab allows you to specify the number and location of girders on each span.

Depending on the option Uniform definitionfor all spans You can define the same location of girders for all spans

or individually for each span separately using the appropriate tab.


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Girder settings

Select beam spacing definition type:


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Calculated by side offsets based on the given number of girders and lateral offsets

(defined parallel to pier), beam spacing is computed automatically

Given at spans based on the given number of girders and girder spacing (defined

perpendicular to road), lateral offsets are computed automatically

In Symmetry you choose side offsets (from the road edges) definition type:

Full symmetry all offsets are computed automatically (available for Given at span

spacing type)

Constant left side offsets allows you to define left offset , constant over the entire

length of the span (available for Given at span spacing type)

Constant right side offsets allows you to define right offset , constant over the entire

length of the span (available for Given at span spacing type)

Variable left side offsets allows you to define left offsets , with variable values over the

entire length of the span (available for Given at span spacing type)

Variable right side offsets allows you to define right offsets , with variable values over

the entire length of the span (available for Given at span spacing type)

Variable side offsets allows you to define each offset independently (available for

Calculated by side offsets spacing type)

Constant both side offsets allows you to define left and right offset independently

(available for Calculated by side offsets spacing type)

For Girder start / end offset, define the offset between the start / end of the girder and the bearing axis.

Under Generalyou specify the number of girders and girder spacing in the middle of the span (forGiven at spans

beam spacing definition type) or the number of girders and side offsets (forCalculated by side offsets beam

spacing definition type).

Note: Edges of the road are marked on the screen as red dash lines (1 and 2).


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The images show the location of the defined parameters in relation to the girder arrangement.


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Girder type

On Girder type tab, you can select the girder cross section type and define its parameters.

Depending on the option Uniform definitionfor all spans You can define the same parameters of girders for all

spans or individually for each span separately using the appropriate tab.


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Select a girder type:

Concreterectangular cross-section


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SteelI-beam cross-section

For Height,select the type of variable height along the length of the beam:

Constant height for girders with constant height

Variable heightlinear for girders with linear variable height

Variable heightcurved for girders with height defined by a circular curve.

Under Dimensions,you can define geometry parameters of the selected girder type.

The image displays graphic representation of the defined parameters of the girder geometry for the selected

category in the Girder and Symmetry lists.


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Bearings

Using the Bearingstab, you can select the bearing type and define its parameters for piers and abutments.

Depending on the option Uniform definitionfor all supports You can define the same parameters of bearings for all

supports or individually for each abutment and pier separately using the appropriate tab.


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Note: For the second and subsequent tabs, you can copy the defined parameters from the first tab by selecting

Copy from first.

If Copy from firstis selected - the geometry parameters are automatically copied from the first tab

and all fields are unavailable for modification.

If Copy from firstis cleared the geometry parameters are automatically copied from the first tab

and all fields are available for modification.


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Under Bearing dimensions, you can define the geometry parameters of the bearing for selected bearing type.

Under Bearing seatdimensions, you can define the geometry parameters of the seat for selected bearing seat

type.

The image displays graphic representation of the defined parameters of the bearing geometry.


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Abutments

TheAbutmentstab allows you to select the bridge abutment type and define its parameters.

Depending on the option Uniform definitionfor all supports You can define the same parameters for both

abutments or define parameters individually for each abutment separately using the appropriate tab.


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Note: For the second abutment tab you can copy the defined parameters from the first tab by selecting Copy from

first.

If Copy from firstis selected (default) - the geometry parameters are automatically copied from the

first tab and all fields are unavailable for modification.


and all fields can be modified.


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ForAbutment,select the abutment type:

Standardabutment without wings

Wingwallsabutment with wings

For Foundation,select the abutment foundation type:

With foundation abutment with foundation in rectangular shape

Piled foundationabutment with foundation in the form of a linear distribution of pile /

columns

Without foundationabutment without foundation

Under Dimensionsyou can define the parameters of abutment geometry.

The image displays graphic representation of the defined parameters of the abutment geometry for the selected

category in theAbutment and Foundationlists.


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Piers

The Pierstab allows you to select the pier type and define its parameters.

Depending on the option Uniform definitionfor all supports You can define the same parameters for all piers or

define parameters individually for each pier separately using the appropriate tab.


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Note: For the second and the subsequent pier tabs You can copy the defined parameters from the first tab by

selecting Copy from first.

If Copy from firstis selected - the geometry parameters are automatically copied from the first tab

and all fields are unavailable for modification.


and all fields are available for modification.


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For Cap,select the pier cap type:

Rectangular pier with rectangular cap

Hammerhead pier with hammerhead cap

Single columns pier without cap

For Column/Wall,select the pier column or wall type:

Rectangular pier with rectangular columns / one rectangular wall

Rounded pier with rounded columns / one rounded wall

Circular pier with circular columns

For Foundation,select the pier foundation type:

Common foundation pier with one common for all collumns foundation in rectangular

shape

Isolated foundation pier with isolated foundation for all collumns

Without foundationpier without foundation

Under Dimensions,you can define the parameters of the pier geometry.

The image displays graphic representation of the defined parameters of the pier geometry for the selected

category in the Slope type list.

Bridge Continuous Girder

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