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Please note that the Bridge Modeler supplements SAP2000 releases through Version 14, and has since extended into CSiBridge. Most material in this space applies to both of these products, therefore the term Bridge Modeler will refer to both SAP2000 and CSiBridge application.


The Bridge Modeler enables parametric definition of girder-type bridge systems. Users initiate high-level parametric modeling by defining span length, layout lines, cross section, and other geometric and structural specifications. The Bridge Modeler then assembles frame, shell, and solid objects, and connects them with link elements, to automatically create bridge objects. The Bridge Modeler expedites design by automatically generating, meshing, and analyzing complex bridge models. Templates are also available for several superstructure and substructure design checks.


Recommended publication
  • [1]

Articles

Tutorials

TitleDescriptionProgram

Analysis and design of composite steel-girder bridge

Use CSiBridge to model a composite steel-girder bridge based on that from the LRFD Design Example, Steel Girder Superstructure Bridge (FHWA NHI-04-041).

CSiBridge

Applying parametric variation to bridge width and girder spacing for bridge object with skewed abutments (steel I-girder bridge deck section)

Demonstration of how to apply parametric variation to the deck width and girder spacing of bridge object with skewed abutments.

CSiBridge

Applying parametric variation to bridge width for bridge object with skewed abutments (flat slab bridge deck section)

Demonstration of how to apply parametric variation to bridge object with skewed abutments

CSiBridge

Applying point, line, and area loads to bridge objects

This tutorial demonstrates point-, line-, and area-load application to bridge objects.

CSiBridge

Concrete box-girder bridge model

Model from the SAP2000 Bridge Examples document.

SAP2000

Create and copy frame properties

Use interactive database editing to create and copy frame section properties between models.

CSiBridge

Haunched steel-girder bridge

Guidelines and tutorial for modeling haunched steel-girder bridges.

SAP2000

Import frame properties from shape libraries

Guidelines for importing frame properties from shape libraries.

CSiBridge

Influence-based moving-load analysis first steps (CSiBridge)

Procedure for setting up influence-based moving-load analysis.

CSiBridge

Influence-based moving-load analysis first steps (SAP2000)

Procedure for initiating influence-based moving-load analysis.

SAP2000

Layout-line geometry

Guidelines for defining vertical and horizontal layout lines, also known as baselines.

SAP2000

Manual modeling of bridge foundations

PowerPoint presentations are attached which provide detailed examples of a 2-span PCC-girder bridge with three different foundation types. A step-by-step modeling procedure, with detailed descriptions and sketches, outlines the process.

CSiBridge

Manual modeling of wall-type bents

This tutorial describes a manual modeling process for wall-type bents within bride objects.

SAP2000

Manual modification of bridge bearings

Guidelines for the manual modification of bridge bearings automatically created by the bridge modeler.

SAP2000

Model from Bridge Seismic Design Request manual

Example bridge model from the Bridge Seismic Design Request manual.

CSiBridge

Pushover analysis first steps

Guidelines for performing pushover analysis.

SAP2000

Steel bridge

Tutorial included with the SAP2000 Bridge Examples document.

SAP2000

Steel-girder bridge with variable flange thickness

Guidelines and tutorial for creating a steel-girder bridge with variable flange thickness.

SAP2000

Step-by-step moving-load analysis first steps (CSiBridge)

Procedure for setting up step-by-step moving-load analysis.

CSiBridge

Step-by-step moving-load analysis first steps (SAP2000)

Procedure for initiating step-by-step moving-load analysis.

SAP2000

Variable girder spacing

Procedure for developing a model with variable girder spacing.

SAP2000

Test Problems

TitleDescriptionProgram

Bridge shrinkage example

Evaluate shrinkage for a one-span and a continuous two-span bridge system.

CSiBridge

Horizontal moving loads

Demonstration of horizontal moving loads

CSiBridge

Hyperstatic forces for bridge-object superstructures

The hyperstatic forces within a superstructure which is modeled using bridge objects may be obtained using any of three methods described in this test problem.

CSiBridge

Staged-construction analysis of two-span precast-girder bridge

Modeling and construction stage analysis of precast-girder bridge which is simply supported for dead load and continuous for live load.

CSiBridge

Start and end station for bridge line-load input

This test problem explains start- and end-station interpretation for line load offset from baseline.

CSiBridge

Temperature-gradient loading for bridge objects

This test problem demonstrates CSI Software calculation and application of temperature-gradient loading to bridge objects.

SAP2000

Tendon force vs. frame response

Tendon application is validated by comparing tendon forces to those in an equivalent frame system.

SAP2000

References

  • [1] – . Guidelines for Nonlinear Analysis of Bridge Structures in California. Berkeley, CA: Pacific Earthquake Engineering Research (PEER) Center.
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