Released 1-Dec-2023

Release Notes



Learn more about the latest enhancements in CSiBridge 25.1.0.

Bridge Modeler


Bottom-flange longitudinal stiffeners can now be specified for steel U-girder bridges using the steel beam editor. The stiffeners are accounted for in analysis as well as superstructure strength design and rating requests. Layout options include the longitudinal start and end position, transverse ratios, orientation and insertion-point location.

Bridge Design and Rating


Superstructure design is now available for precast box girder bridges according to the AASHTO code.


Comprehensive calculation reports are now available for superstructure design of multi-cell concrete box-girder bridges according to Eurocode. These provide detailed calculations and diagrams for the flexural demands and flexural resistance for each individual girder.

Output and Display


Performance improvements have been made to increase speed and reduce memory usage when recovering results.

Cloud Sign-in Licensing


Cloud Sign-in licensing is now available

  1. • Access CSI software using secure user credentials — no more activation keys
  2. • Access licenses anywhere with internet access
  3. • Option to create License Groups to manage who has access to your licenses
  4. • Option to remotely terminate an active license session
  5. • Option to federate your identity provider (IdP), allowing users to user their familiar company credentials instead
Cloud Sign-in Licensing Details

Bug Fixes


Issues reported by users have been corrected.


Released 7-Jul-2023

Release Notes



Learn more about the latest enhancements in CSiBridge v25.0.0.

Bridge Modeler


Wall piers can now be defined and included within a bridge model.


A precast-concrete box-girder bridge section has been added. Girders can be in contact or separated. Grouting conditions can be considered, with control available in staged construction.


Layout lines can now include circular segment types.

Bridge Design and Rating


Strength design of bent columns according to IRC 112-2020 has been added.


Service cracking check of bent columns according to AASHTO LRFD 2020 has been added.


California amendments to the AASHTO LRFD Bridge Design Specification – 8th Edition have been added for steel and concrete bridge design and rating.

Structural Model


Frame hinge assignment presets, including distributed plasticity are now available.

Data Files


JGJ/T 483-2020 high-strength steel materials have been added to the Chinese material library.

Database Tables


Detailed data for a single database table row is now available.

Application Programming Interface (API)


A new API has been added that provides access to the bridge modeler and bridge object functionality.

Bug Fixes


Issues reported by users have been corrected.


Released 15-Feb-2023

Release Notes

Bridge Design and Rating


Comprehensive design calculation reports have been added for Chinese JTG 3362-2018 bridge superstructure design checks for shear, torsion, and combined shear and torsion.



Temperature loads can now be applied to rail tracks. Loads can vary along the length of the track. Nonlinear analysis can capture slippage at the track supports, and linear or nonlinear buckling of the track under temperature loading can be analyzed.


Temperature loads applied to bridge objects are now automatically applied to their tendons when the tendons are modeled as elements.

Bridge Modeler


Simple circles have been added to the definition of bridge layout lines for cases where highway spirals are not needed.

Bug Fixes


Issues reported by users have been corrected.


Released 12-Oct-2022

Release Notes

Bridge Design and Rating


The strength design of substructure (bent) columns has been added according to the AASHTO LRFD 2020 code. Design is controlled by defining one or more Design Requests which can specify a set of load combinations, bent columns, column stations, and other parameters to be considered. Results for each Design Request are provided in the form of an Excel spreadsheet that can be used for further calculations and for inclusion in reports. Design results are also available in database tables for display, export, and reporting.

Structural Model


New and updated property libraries:
  • • New Indian frame-property library for steel sections
  • • Updated Chinese frame-property library
  • • New Canadian material-property library



New Zealand vehicle library has been updated.

Output and Display


New database tables "Bridge Object Forces with Tendons" and "Bridge Object Girder Forces with Tendons", providing the secondary prestress forces on the full bridge section and the individual bridge girders


Improved display of nonlinear hinge states and statuses.

Application Programming Interface (API)


The Application Programming Interface (API) now offers more control for connecting to multiple instances of CSiBridge, a new interface to simplify the development of plugins, and speed enhancements for external .NET clients.

Bug Fixes


Issues reported by users have been corrected.


Released 11-Mar-2022

Release Notes

Bridge Modeler


Bridge tendon layout can now be parametrically defined directly with respect to any girder as well as the bridge layout line.


Modeling of closure pours at double-bearing bents for concrete precast I-girder and Super-T girder bridges is now available. This can be used to simulate a live-load continuous superstructure or full integral continuity with the substructure.

Bridge Design and Rating


Bridge superstructure design according to the AASHTO LRFD 2020 code has been added. This new code is also available as a resistance code for superstructure rating.


Longitudinal web stiffeners for steel I-girders and steel U-girders can now be modeled on a girder-by-girder basis. These stiffeners are carried through modeling, analysis, design and rating.



Concrete shell design per Eurocode 1992-1-1:2004 has been enhanced, including the ability to set design preferences and national annexes, improved iteration for determining the optimum amount of reinforcement, handling of variable-thickness shells, and the presentation of detailed results in tabular form.



Time-dependent behavior of concrete has been added for the AS3600-2018 code, including creep, shrinkage, and age-dependent stiffness.


The ability to enable/disabled the coupling between major bending, shear V2, and torsion is now available for channel and general sections.

23.3.0 | 23.3.1

Released 24-Sep-2021

Release Notes



New vehicles have been added to the AASHTO Rating and Caltrans libraries.



Steel frame design according to the AASHTO 2020 LRFD code has been added.

Output and Display


Moving load response recovery has been sped up by means of multi-threading for database tables and the bridge object response display.


Superstructure design calculation reports are now available for multicell concrete box and concrete T-beam bridges according to the IRC code.


Released 19-May-2021

Release Notes



Staged-construction operations Pour Concrete and Remove Forms are now available for Super-T bridge sections. Using these operations, the weight of the wet concrete slab can be applied to the girders in one stage, and the stiffness of the cured slab activated in a subsequent stage.



The response-spectrum function according to the Chinese JTG/T 2231-01-2020 code has been added.



Performance has been improved for models with frame elements in the presence of many load patterns. This includes speed increases in stiffness formation, event determination, and state-update operations. Nonlinear static, staged-construction, and nonlinear direct-integration time-history load cases will benefit the most.


Speed improvements have been made for calculating joint-reaction response for influence-based moving-load cases.


Released 15-Mar-2021

Release Notes

Application Programming Interface (API)

CSiBridge v23.1.0 Enhancements Application Programming Interface (API)

Improved performance and examples for remote API and COM clients.


CSiBridge v23.1.0 Enhancements Loading

Temperature gradient loading has been added according to the IRC:6-2017 code.

CSiBridge v23.1.0 Enhancements Loading 1

Automatic bridge wind loading has been added according to the IRC:6-2017 code.

CSiBridge v23.1.0 Enhancements Loading 2

The IRC vehicle library has been expanded to include the Special Vehicle (SV), Fatigue Truck (40T), and 70R Tracked vehicle per the IRC:6-2017 code.


Released 25-Jan-2021

Release Notes


Learn more about the latest enhancements in CSiBridge v23.0.0.


CSiBridge v23.0.0 Enhancements Analysis

Speed improvements to moving load analysis on spine models containing many influence points.

CSiBridge v23.0.0 Enhancements Analysis 1

Speed improvements nonlinear static, nonlinear multi-step static, and nonlinear direct-integration time-history cases using the advanced or multi-threaded solvers.


CSiBridge v23.0.0 Enhancements Bridge Design & Rating

Precast Super-T girder design has been implemented according to the NZTA Bridge Manual.


CSiBridge v23.0.0 Enhancements Bridge Modeler

Layout lines can now be defined using point-of-intersection data.

CSiBridge v23.0.0 Enhancements Bridge Modeler 1

New Super-T girder and bridge-section definitions have been added, including detailed tendon layout.

CSiBridge v23.0.0 Enhancements Bridge Modeler 2

Job scripting has been added to allow automating several analysis, design and reporting actions into a single command in order to expedite iterative tasks.

User Interface

CSiBridge v23.0.0 Enhancements Application Programming Interface (API)

Database tables can now be accessed via the API for both editing and display purposes.

Cloud Licensing

CSiBridge v23.0.0 Enhancements Cloud Licensing

Cloud-based licensing is now standard for CSiBridge.

  1. • Cloud-based server requires no setup
  2. • Access licenses outside of company networks and VPNs
  3. • Share licenses between users (non-simultaneous)
  4. • Check-out a license to work offline
Cloud FAQ