# Prestressed I Girder Bridge This example demonstrates how to model, analyze, and design a Prestressed I Girder Concrete Bridge using OpenBrIM.App. ![Prestressed I Girder Bridge Model](https://openbrim.atlassian.net/wiki/download/attachments/2101706864/ws-guide-prestressedigirder-20230703-121430.png?api=v2) {% hint style="success" %} **Ready to start?** Access the completed example in **New Project > Example Projects**, or follow this step-by-step guide to build from scratch. {% endhint %} ![Example Projects](https://openbrim.atlassian.net/wiki/download/attachments/2101706864/image-20230710-162629.png?api=v2) ![Prestressed I Girder Example](https://openbrim.atlassian.net/wiki/download/attachments/2101706864/image-20230710-162657.png?api=v2) ## Capabilities ### 3D Modeling * Generate parametric 3D model with substructure and superstructure * Export to DGN/DXF/IFC formats ### Finite Element Analysis * Parametric FEA model generation * Time-dependent staged construction analysis * Influence surface-based live load analysis * Creep and shrinkage per CEB-FIP 1990 ### Loading * Wind load on structure (AASHTO) with automatic nodal load calculation * Wind load on live load * HL-93, Legal Trucks, Permit Trucks (custom trucks supported) * Temperature loads * Surface/Line/Point loads * Tendon stressing for superstructure and substructure ### Staged Construction * Deck pouring sequence (transverse and longitudinal) * Deconstruction for rehabilitation projects * Temporary support management * Non-composite and composite state modeling * Short-term and long-term modulus of elasticity ### Analysis Results * Stage-by-stage results (incremental and cumulative) * Deflection visualization and spreadsheet export * Combination results for all limit states * Composite section results * Stress distributions * Critical vehicle location visualization ### Design Components supported per AASHTO 9th Edition: * Prestressed I Girder * Cross Frames * Pier Caps, Columns, Footings * Piles, Drilled Shafts ### Export & Reports * Export to LARSA 4D, CSI Bridge, Midas * Quantity Report * Seat/Slab Elevation Tables * Project Inputs * Vertical Clearance Report * 2D Drawings (DGN/DXF export) ## Workflow Steps Follow these sections to complete the bridge design: | Step | Section | Description | | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------- | | 1 | [Modeling on OpenBrIM.App](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/modeling-on-openbrimapp-ex1-pig) | Create new project | | 2 | [Bridge Geometry](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/bridge-geometry-ex1-pig) | Define alignment, supports, girder layout | | 3 | [Properties](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/properties-ex1-pig) | Define materials, rebars, sections, strands | | 4 | [Superstructure](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/superstructure-ex1-pig) | Model girders, deck, diaphragms, bearings | | 5 | [Superstructure Attachments](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/superstructure-attachments-ex1-pig) | Add barriers, roadway | | 6 | [Substructure](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/substructure-ex1-pig) | Model piers, foundations, piles | | 7 | [Construction](https://github.com/openbrim/platform/blob/master/docs/examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/construction-ex1-pig/construction-stage-ex1-pig.md) | Define construction stages | | 8 | [Loading](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/loading-ex1-pig) | Apply all load types | | 9 | [Combinations](https://github.com/openbrim/platform/blob/master/docs/examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/combinations-ex1-pig/result-extraction-cases-ex1-pig.md) | Set up load combinations | | 10 | [Templates](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/templates-for-code-check-and-load-rating-ex1-pig) | Configure code check templates | | 11 | [Superstructure Code Checks](https://github.com/openbrim/platform/blob/master/docs/examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/superstructure-code-checks-ex1-pig/prestressed-i-girder-code-check-ex1-pig.md) | Run girder design checks | | 12 | [Substructure Code Checks](https://github.com/openbrim/platform/blob/master/docs/examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/substructure-code-checks-ex1-pig/pier-cap-code-check-ex1-pig.md) | Run substructure design checks | | 13 | [Analyze and Design](https://docs.openbrim.org/examples/concrete-bridge-examples/example-prestressed-i-girder-concrete-bridge-ex1-pig/analyze-and-design-ex1-pig) | Run analysis and review results | {% hint style="info" %} Whenever you modify a bridge component parameter or alignment, all associated results and reports will automatically update. This demonstrates the power of parametric bridge engineering in OpenBrIM. {% endhint %}