Stephen Herrick

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GEOPAK BRIDGE 2001
Stephen Herrick Kansas Dept. Transportation sherri
ck_at_ksdot.org
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GEOPAK Bridge

• Bentley's GEOPAK Bridge is object-oriented
  software for modeling bridges. It offers
  intelligent bridge components that promote fast,
  dynamic design and facilitate design
  modifications. GEOPAK Bridge is fully integrated
  with MicroStation/J and the GEOPAK Civil
  Engineering Suite, providing you easy access to
  essential transportation design information while
  modeling in a powerful, interactive environment.
• The software includes a Bridge Project Explorer
  that offers an intuitive way of working with
  bridge components, subcomponents and their
  properties. You can generate bridge alignments
  with Alignment Manager, or use alignments created
  in GEOPAK Civil Engineering Suite or GEOPAK Site.
  Bridge deck surfaces can be defined with GEOPAK
  Bridge Surface Manager, a flexible means to
  creating deck surfaces that includes using the
  superelevation shapes from your GEOPAK roadway
  data.
• GEOPAK Bridge also provides a Deflection Manager
  that analyzes beam haunch conditions based on
  user-definable deflection rules, reporting any
  failures related to minimum haunch conditions.

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What was all That???

• In simpler words, Bridge works in a 3D file. It
  allows the modeling of the deck, rails, and
  concrete beams. These shapes can be
  user-definable. There can be multiple bridges in
  a single design file. GEOPAK Bridge supports
  GEOPAK Shapes for superelevations to create the
  deck. It also utilizes the GPK file that stores
  the horizontal and vertical master alignment
  (Center line of roadway).

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How KDOT is using GEOPAK Bridge

• For the past 2 months KDOT Bridge design has been
  evaluating GEOPAK Bridge to find out how we can
  use the product.
• Currently we are using GEOPAK Bridge primarily,
  for calculating deck elevations along the center
  line of the girders from the bearing points of
  each bent line. Also the offset from the base
  line are also being calculated.
• Unfortunately the deflection and camber
  calculations that GEOPAK Bridge produces, are
  calculated for simple spans, KDOT calculates the
  live load deflections by a continuos span method.
  The beam reports do provide additional
  information that can be used.

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How KDOT is using GEOPAK Bridge

• The flexibility of the report writing allowed us
  to create customize the alignment report for
  information that was specific to our needs. A
  great example of this is the fact that that the
  report need to have the Span, Tenth Point,
  Stations from base line, deck elevation, and
  offsets. The standard report (alignment.rpt) was
  not easily readable, it had nomenclature that did
  not adhere to our designs so by modifying the
  report to fit our needs we now have a useful
  report that.

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BRIDGE TOOLS

• Bridge Explorer
• Bridge Project Manager
• Bridge Alignment Manager
• Bridge Properties Manager
• Bridge Section Manager
• Bridge Surface Manager
• Bridge Deflection Manger
• Bridge Bearing Manager
• Bridge Pier Modeler
• Bridge Span Modeler
• Bridge Beam Modeler
• Bridge Reports

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Bridge Explorer
The Bridge Project Explorer enables the user to
view all components and sub-components of a
Bridge through a hierarchical tree structure. The
Explorer allows you to expand and collapse bridge
components as necessary. All bridge components
can be edited directly from the Bridge Explorer
by simply double-clicking.
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Project Manager

• The GEOPAK Bridge Project Manager enables the
  user to add, delete, and modify various bridges
  within the current project.

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Bridge Alignment Manager

• The GEOPAK Bridge Alignment Manager enables the
  user to add, delete, and modify various
  alignments within the current project.

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Bridge Alignment Manager
GEOPAK Bridge alignments are comprised of both a
Horizontal and Vertical component. The
Horizontal component is a GEOPAK chain, while the
Vertical component can be a GEOPAK profile,
surface, or not defined. Alignments can be
modified at any time during the design process.
For example, an Alignment can be stored, and the
Profile or Surface subsequently added by
utilizing the modify option. Chains and
profiles from various GEOPAK coordinate geometry
(.GPK) files may be utilized.
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Bridge Properties Manager

• The GEOPAK Bridge Properties Manager enables the
  user to define a wide variety of preferences
  utilized for drawing bridge elements, textual
  parameters, etc. for the active bridge within
  the current project.

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Bridge Properties Manager

• Several tabs are supported within the Properties
  Manager
• Project Defines the project report templates.
• Bridge Defines the bridge report templates.
• Alignments Defines element symbology for
  alignment elements
• Pier Lines Defines element symbology for pier
  line elements and associated text.
• Decks Defines element symbology for deck
  elements and associated text.
• Beams Defines element symbology for beam elements
  and associated text.

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Bridge Section Manager

• The GEOPAK Bridge Section Manager enables the
  user to add, delete, and modify various sections
  within the current project.
• Prior to invoking the Section Manager, the
  section to be created or modified should be drawn
  to scale within a MicroStation design file.

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Bridge Section Manager

• The sections created are similar, to creating
  cells in MicroStation. You simply draw the
  object, place a fence around it, locate the
  working point and then use the scan from dgn file
  option. The section will then be displayed a
  dialog box. These sections are stored in the
  bridge.xml file.

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Bridge Surface Manager

• The GEOPAK Bridge Surface Manager enables the
  user to add, delete, and modify various surfaces
  within the current project.
• Several data sources can be utilized within
  Surfaces. These include
• GEOPAK Shapes
• Top side of Deck Component
• Bottom side of Deck Component
• Combined Selected Surfaces

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Bridge Surface Manager(Top Deck)
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Bridge Surface Manager(Bottom Deck)
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Bridge Surface Manager(Bottom Deck)
Before you can create the Bottom of Deck surface
you must first create the deck section using the
Continuous Span Modeler tool. Once the deck has
been created you will be able to pick it from the
list of surfaces.
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Bridge Deflection Manager

• The GEOPAK Bridge Deflection Manager enables the
  user to add, delete, and modify deflection
  patterns within the current project.

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Bridge Deflection ManagerDeflection Methods

• Five Deflection Methods are supported within
  GEOPAK bridge

• End Point The affected spans are defined in the
  Start Span and End Span key-in fields located in
  the right side of the group box. The Spans must
  be previously defined, which are automatically
  set from the pier construction lines.
• Mid Point In this option, the deflection is
  specified at the mid-point of the span, rather
  than the ends. The value is entered in the
  Mid-Span field and a Parabolic option is
  supported by activating the toggle.
• 1/4 Point In this option, the deflection is
  specified at the mid-point and quarter points of
  the span, rather than the ends. The values are
  entered in the three key-in fields.
• Import Deflections In this option, the values
  are imported from a deflection.dat file located
  in the \geopak\bridge\support directory. The
  designer can specify the percentage of the span
  and the associated Deflection.
• Combination of Rules This option is utilized
  after the New Deflection Rule is created. By
  selecting this option, previously defined rules
  are populated in the list box. By highlighting
  them, factors can be assigned to the selected
  rules.

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Bridge Bearing Manager

• The GEOPAK Bridge Bearing Manager enables the
  user to add, delete, and modify various bearings
  and associated dimensions within the current
  project.
• At this time the current version only utilizes
  this for output to the Beam Report

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Bridge Pier Modeler(No it does not create a 3d
model of the pier)

• The GEOPAK Bridge Pier Modeler enables the user
  to add, delete, and modify pier lines for the
  active bridge within the current project.
• The length of line that represents the pier line
  (bent line), does not represent the pier width.
  It is controlled by the bridge.dat file.

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Bridge Pier Modeler

• The pier lines are used when creating a surface.
  Such as the deck and rails.

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Bridge Surface Modeler

• The GEOPAK Bridge Surface Manager enables the
  user to add, delete, and modify various surfaces
  within the current project.
• Surface types used by KDOT
• Rail (F Barriers for example)
• Uniform Decks

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Bridge Surface Modeler

• A span can be created by
• Create a slab name
• Select the beginning and ending span. (This
  information is from the pier modeler)
• Select the Section
• Choose the control point

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Bridge Beam Modeler

• The GEOPAK Bridge Beam Modeler enables the user
  to add, delete, and modify various beam groups
  within the current project
• After creating the different spans. You then
  define the spacing and type of beam. The beam
  selection is created with the section generator.

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Bridge Reports Manager
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Bridge Reports Manager

• The GEOPAK Bridge Reports Manager enables the
  user to create and update a variety of repots
  within the current project. When the Repots
  Manager tool is selected, the Reports Manager
  dialog opens. At the beginning of a project, the
  list box in the the center of the dialog is
  blank. As Reports are defined, they are added to
  the list. When you create a report you then go
  make that a active report in the Bridge
  Properties dialog. Then you will be able to
  utilize the report.

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Bridge Reports Manager

• The Project Explorer facility in GEOPAK Bridge
  displays all the components of a bridge design in
  an inverted tree like list. Certain components
  are sub-components of other components. A bridge
  consists of piers, spans and deck, these are
  sub-components of the bridge component, which
  itself is a sub-component of the entire project.
  This tree structured hierarchy is the basis of
  the report generator facility in the Bridge
  software. The report facility provides methods
  for displaying information and extracted data
  from each component, and for presenting this data
  in various file output forms.

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Bridge Reports Manager

• The presentation is done through the use of a
  report template definition that specifies rules
  and text placement formatting. Each component
  type such as Pier needs a unique report
  template definition for its layout and
  presentation. The report template definition is a
  text file that is associated with component
  groups as
• Report Property. The Report Properties are also
  applied in a tree hierarchy where a property set
  for a component automatically applies for its
  sub-components. Each sub-component may have
  attached different report property that
  effectively overrides the ancestors property.

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Bridge Reports Manager

• The reports were to me, the hardest part of
  GEOAPK Bridge. The delivered templates did not
  output the information that could be easily used.
  Also the report templates use other files to
  define the different variables that are in the
  templates. To get a full explanation of the
  reports and how they work you will need to read
  the help files. These are not part of the
  GEOPAK-gt Bridge-gtHelp, they are separate
  installation.