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For structural engineers specializing in bridge design, CSI Bridge (formerly CSiBridge) is the gold standard for modeling, analysis, and design of complex bridge structures. However, even seasoned professionals can feel overwhelmed by the software's vast capabilities. Whether you are a student, a junior engineer, or a senior bridge designer, the CSI Bridge User Manual is your most critical tool—yet it is often underutilized.
| Document Name | Primary Focus | | --- | --- | | | Step-by-step workflows, interface navigation, object-based modeling (superstructures, abutments, bearings), and lane/vehicle definition. | | CSI Analysis Reference Manual | The mathematical backbone: finite element formulations, p-delta analysis, time history, and cable modeling. Crucial for advanced users. | | Bridge Superstructure Design Manual | Code-specific design (AASHTO LRFD, Eurocode, etc.): reinforcement calculations, stress checks, and detailed design reports. | | Watch & Learn Videos | Embedded tutorials within the software (though not a manual, they reference manual sections). | | Command Reference | An alphabetical index of every menu item and command. | csi bridge user manual
| Scenario | Which Manual to Open | | --- | --- | | "How do I draw an abutment?" | (Chapter 3 – Substructure) | | "Why is my moving load not giving moment envelopes?" | User Manual (Chapter 5 – Analysis Cases) | | "What is the convergence tolerance for nonlinear analysis?" | Analysis Reference Manual (Chapter 4 – Nonlinear Analysis) | | "How does CSI Bridge calculate influence surfaces?" | Analysis Reference Manual (Chapter 10 – Influence Surfaces) | | "What formula is used for shear design in AASHTO LRFD?" | Bridge Superstructure Design Manual (Chapter on Design Code) | For structural engineers specializing in bridge design, CSI
| If you want to know about... | Search for these terms in the PDF | | --- | --- | | Prestress losses | "time-dependent loss," "relaxation," "shrinkage," "creep coefficient" | | Bearing stiffness | "bearing link," "stiffness matrix," "elastic spring" | | Pile foundation | "pile cap," "soil springs," "Winkler foundation" | | Seismic analysis | "response spectrum," "pushover," "capacity spectrum" | | Parametric variation | "parametric model," "bridge wizard," "variable definition" | | Error XYZ-123 | Appendices – Error messages are listed numerically. | | Document Name | Primary Focus | |
CSI does not always use the same terminology as AASHTO. For example, "camber" appears under "Construction Geometry Control." Use the manual's index (printed at the end of the PDF) before using full-text search. Part 7: The CSI Bridge User Manual vs. The Analysis Reference Manual – When to Use Which This is the most common point of confusion. Let’s clarify.
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