Combines modeling, analysis, code-checking, and optimization within a single user interface. 2. Core Modeling Elements
What you are modeling (e.g., concrete box girder, steel girder). The design code you are required to use.
The Ultimate Guide to CSiBridge: Structural Modeling, Analysis, and Design csi bridge user manual
For segmental, cable-stayed, or cast-in-place bridges, the sequence of construction changes the stress profile significantly. CSiBridge allows you to define time-dependent material properties (creep and shrinkage) and simulate adding/removing elements, tensioning tendons, and applying temporary construction loads over time. 5. Design, Code Checking, and Output
The layout line establishes the horizontal and vertical alignment of the bridge, including curves, spirals, and grade profiles. Click the tab and select Layout Lines . Click Add New Line . The design code you are required to use
Export detailed, tabbed tables of force envelopes and displacement matrices for external calculations.
Define design load combinations (Strength, Service, Extreme Event). Click . Concrete Box Girder).
Run the design check to view Demand/Capacity (D/C) ratios for flexure, shear, and torsion. Interpreting Results
Perform linear, non-linear, time-history, buckling, and staged-construction analysis.
The CSI Bridge User Manual is a solid, application-focused resource ideal for practicing bridge engineers for everyday modeling, analysis, and design tasks. It should be used alongside engineering judgment, hand calculations, and supplemental theoretical references for advanced numerical or research-grade modeling.
To define the bridge deck cross-section, go to and select your deck type (e.g., Concrete Box Girder). Input the detailed parametric dimensions (web thickness, slab depth, overhangs). 3. The Parametric Bridge Modeling Workflow