CSiBridge Releases

LEARN ABOUT THE NEW FEATURES IN THE LATEST RELEASE

Release Date: 19 Sep 2018

CSiBridge 20.2.0 Enhancements

Bridge Modeler

The quick bridge template has been expanded to allow defining a more complete model, including substructure, superstructure, loading, and design criteria

Bridge deck section superstructure loads provide the ability to easily model barrier, median, sidewalk, haunch, construction, and wearing surface loads

User specified diaphragm depths can now be specified for precast I-girder and concrete tee bridges

Modeling

Automated prestress tendon generation based on tendon layouts defined in precast I-girder frame section properties

Analysis

Dynamic collapse analysis allows an object to be removed during a nonlinear direction integration time history analysis

Bridge Design

Bridge superstructure design has been added according to the AASHTO LRFD 2017 8th Edition code

Load rating of steel U-girder composite bridges has been added according to the AASHTO Manual for Bridge Evaluation 2nd Edition

Load rating of steel U-girder composite bridges has been added according to the CAN/CSA-S6-14 code

Release Date: 04 May 2018

CSiBridge 20.1.0 Enhancements

Bridge Modeler

User-defined concrete box-girder sections can now be updated as area or solid models for analysis and superstructure design and rating

Analysis

Linear time-history analysis can now be performed in the frequency domain allowing the consideration of frequency-dependent properties, sub-systems, and/or boundary conditions

Bridge Design

Load rating of concrete box girders, precast I and U-girders, and steel composite I-girders has been added according to the CAN/CSA-S6-14 code

Design of steel composite I-girders has been added according to the BS 5400 code

Results Display & Output

Detailed calculation reports for AASHTO steel I-girder rating have been added

Strain results are now available for shell and solid objects

External Import/Export

Area objects in a specified X-Y plane can now be exported to SAFE for further analysis, design, and detailing

Release Date: 18 Dec 2017

CSiBridge 20.0.0 Enhancements

Loading

The transverse position of vehicle lanes has been automated for influence-based moving load analysis using floating lane sets.

Analysis

The effect of reinforcing steel on the axial creep and shrinkage behavior of concrete in columns and walls is now included in the time dependent staged-construction analysis.

A pure event-to-event option has been added for nonlinear static analysis.

Bridge Design

Bridge superstructure design checks for precast I-girder and precast U-girder bridges have been implemented according to the BS 5400 British code.

Bridge superstructure design checks for concrete slab bridges have been implemented according to the AASHTO LRFD code.

Bridge superstructure design and rating of steel I-girder bridges now considers local girder effects when the bridge object is updated as a spine model.

Superstructure design of concrete box-girder bridges according to AASHTO LRFD now offers the Modified Compression Field Theory (MCFT) method, including torsion, for performing shear design according to AASHTO 5.8.3.4.2.

Modeling

An option has been added to control the limiting negative stiffness ratio for frame hinges.

Drafting

Measurements

On-screen measuring tools available for measuring length, area, and angles.

Release Date: 13 Dec 2017

CSiBridge 2017 19.2.0|19.2.1|19.2.2 Enhancements

Modeling

Link Properties

New link property for high-damping rubber isolator bearings.

Loading

Guide Structure operation for locating added members during staged construction analysis.

Simulation of concrete pour operation for the top slab during staged construction of composite bridges.

Automated wind loading per the Indian code IS:875 (Part 3) 2015

Analysis

Displacement Control

Nonlinear static load cases now allow multiple controlled displacements for better convergence behavior.

Modal Damping

Additional modal damping in linear and nonlinear direct integration time history load cases.

Bridge Design

New detailed calculation reports added for AASHTO LRFD steel I-girder superstructure service design requests.

Eurocode superstructure design for solid girder bridge sections.

Results Display & Output

New tabular output of frame design forces for design load combinations

Displacement contours plots displayed on faces of solid elements

Release Date: 14 Mar 2017

CSiBridge 2017 19.1.0 Enhancements

Graphical User Interface

DirectX

DirectX graphics has been enhanced for quality and speed.

Modeling

Moment & Shear Releases

Moment and shear releases can now be assigned to the edges of shell-type area objects.

Time-dependent material behavior now available per Eurocode 2-2004, AS 3600-2009, NZS 3101-2006, JTG D62-2004 codes and the GL2000 model. This includes creep and shrinkage strain as well as age-dependent stiffness.

Vietnamese Material Libraries

Vietnamese concrete and rebar material libraries now available.

Analysis

Convergence behavior of the friction-pendulum and triple-pendulum isolator link elements has been enhanced.

Bridge Design

Bridge Superstructure Design

Bridge superstructure design for concrete slab deck sections per Eurocode has been added, including stress, flexural strength, shear strength, and crack checks.

Results Display & Output

The performance of the Bridge Object Response Display form has been enhanced when plotting previously viewed results.

A detailed superstructure design output report for AASHTO steel I-girder strength design has been added.

Release Date: 18 Nov 2016

CSiBridge 2017 19.0.0 Enhancements

Graphical User Interface

Several edit menu forms enhanced to allow them to remain open for repetitive use with an apply button.

Keyboard shortcut keys implemented within the menu interface, including customization of the shortcuts.

Modeling

Hysteresis Models

New and enhanced hysteresis models for nonlinear materials, hinges, and links have been added.

PMM Hinges

A new parametric P-M2-M3 frame hinge has been implemented for use with performance-based design and other types of nonlinear analysis

Bridge Modeler

Girder-Only Section Cuts

Girder-only section cuts implemented for steel I-girder bridge sections to capture changes in girder sections, staggered diaphragms, and splice locations in individual girders. This also improves the design and rating of steel I-girder sections by better accounting for the controlling section within each panel.

Linked Model

A new action “Clear and Create Linked Model” added to the Action dropdown list in Update Bridge Structural Model form. Once selected, the previous program-generated linked model will be cleared (and cleaned) first and a new linked model created.

Analysis

Energy Plots

Step-by-step energy plots available for nonlinear direct-integration time-history load cases and for nonlinear static/staged-construction load cases.

Nonlinear Hinges

Model frame nonlinear hinges as links, allowing for use of nonlinear modal time-history analysis (FNA) for faster analysis.

Size of the saved analysis results files is reduced for multi-step nonlinear static and nonlinear direct-integration time-history load cases.

Speed of creating analysis model from a bridge object improved for the operation that creates the bridge loads.

Section Designer

Import Geometry

Import geometry from a DXF file into Section Designer.

Release Date: 19 Aug 2016

CSiBridge 2016 18.2.0 Enhancements

Graphical User Interface

  • New display allows displaying all loads, within a single load pattern, on all object types, in a single display.

Modeling

  • Modeling settings can be saved and later used when starting a new model.

Save material properties, frame sections, load patterns, design preferences and other definitions to use in a new model.

Bridge Modeler

  • Define bents without cap-beams for use with concrete box-girder bridges.

  • Orient internal diaphragms at bent support locations in steel U-girder bridge sections.

Generate internal diaphragms along the bent skew or perpendicular to the girder line.

Loading

  • Response spectrum function added for Russian codes.
  • Response spectrum function added to Chinese code CJJ 166-2011 and updated for Chinese code JTG B02-2013.

Russian response spectrum SP 14.13330.2014.

  • Chinese vehicle library updated.
  • Chinese bridge load combinations updated with Fundamental, Frequent and Quasi-permanent combinations.

Chinese vehicle library updated to include CJJ 011-2011 vehicles, special live-load vehicles per TB 10002.1 and JTG D60-2015 vehicles.

Analysis

Direct-integration time-history frame hinge results.

  • Event-to-event solution strategy implemented as an option for nonlinear direct-integration time-history load cases.
  • Increase in the speed of nonlinear static and direct-integration time-history analyses.
  • Increase in speed of moving load analyses for calculating vehicle response for frame objects and join reactions.

Bridge Design

  • Bridge live-load modeling and superstructure design and rating enhancement to AASHTO code.

Enhanced to incorporate requirements for PennDOT.

  • Chinese bridge seismic design enhancement.

Substructure Category included along with the implementation of concrete hinge model, bent failure criteria and hinge limit states.

Results Display & Output

  • Correspondence can now be explicitly requested for the Analysis Results.

Release Date: 02 Mar 2016

CSiBridge 2016 18.1.0 | 18.1.1 Enhancements

Graphical User Interface

  • Loads can graphically be displayed on a model for each stage of a staged construction load case.

  • All load types in a load case can be graphically displayed in a single view.

Modeling

  • New Zealand vehicle library added.

  • New Zealand material property library added.

Bridge Modeler

  • Section cuts are automatically created at user-defined ‘All Spaces’ splice locations.

Analysis

  • New operation added for staged-construction load cases to allow changing link properties.
  • Event-to-event solution strategy implemented as an option for nonlinear direct-integration time-history analysis.

Bridge Design

  • Automated seismic design extended to consider the bridge capacity in the longitudinal direction.
  • Increase in the speed of performing bridge superstructure design and rating for certain models
Release Date: 30 Oct 2015

CSiBridge 2016 18.0.0 | 18.0.1 Enhancements

Graphical User Interface

  • Assign and select menu forms enhanced to allow them to remain open for repetitive use with a new apply button.

Floating forms for multiple use

  • DirectX graphics mode enhanced to use DirectX 11 for enhanced speed and capabilities.
  • A full 64-bit version of CSiBridge is now available.

Modeling

  • New 2-D modified Darwin-Pecknold concrete model added to the nonlinear layered shell. This model represents concrete compression, cracking, and shear behavior under both monotonic and cyclic loading, and accounts for crack rotation.

Layered shell definitions

  • New cable-stayed bridge template added.

Cable-stayed bridge template

  • Additional frame and shell (non-bridge) templates added.

Non-bridge templates

  • Modify undeformed geometry feature enhanced to allow applying the modification to a selection of joints, as well as limiting the direction of modification.

Modify undeformed geometry settings

Bridge Modeler

  • New construction scheduling wizard added for segmental bridges, allowing for quick and easy creation of a construction schedule, including travelers.

Stage construction of segmental bridge

  • User-defined bridge sections can now be created and used in the bridge modeler, including different materials, openings, radii, parametric variations, and editing in Excel or section designer.

User-defined with circular openings

  • Bridge modeler enhanced to more accurately define the geometry in the vicinity of a skewed support, diaphragm, or in-span hinge for curved bridges and/or parametric variations of the bridge section at the skew.

Auto-meshed complex skewed geometry

Loading

  • AASHTO legal loads for load rating added to the vehicle library.

AASHTO Lane-Type Legal

Analysis

  • A new stability check added for nonlinear static load cases to report when the structure may have failed under material or geometric nonlinearities that are not obvious from the analysis results.
  • Handling of convergence tolerances for time-dependent behavior during staged-construction analysis improved to better enforce equilibrium after large load increments.

Bridge Design

  • Superstructure design according to CSA S6-14 added.

Superstructure design code selection

  • It is now possible to specify the location of steel I-girder splices, including the net to gross area ratio of the flanges in order to perform the design checks at these locations using the reduced flange area.

Bridge splice assignment

  • Superstructure design and rating of steel I-girder bridges according to AASHTO LRFD enhanced to consider a detailed calculation of the moment-gradient factor Cb.

Output and Display

  • Contour plots now available for frame deflections and axial stresses.

Color displacement contours of multi-span bridge

  • It is now possible to output the vehicle position for moving load analysis, for a specified max/min force component at a particular location.

Vehicle location output

Release Date: 06 Jul 2015

CSiBridge 2015 17.3.0 Enhancements

Modeling

  • Curved frame members are now displayed in extruded views.

Extruded curved frame members

  • Arbitrary placement of support bearings at bents and abutments for concrete box-girder bridges.

Arbitrary bearing placement definition

  • Time dependent creep and shrinkage curves for CEB FIP-2010, ACI 209R-92, and user-defined.

Creep and Shrinkage curves

Output

  • Steel I-girder and U-girder tabular design output for all load combinations at each design station.

Display options of tabular design output.

Design

  • AASHTO LRFD 2012 6th Edition and 2014 7th Edition concrete frame design.

CSiBridge concrete frame design code selection

Release Date: 20 May 2015

CSiBridge 2015 17.2.0 Enhancements

Modeling

  • Segmental bridge template and wizard for quick definition of spans and segments as well as tendon layout.

Segment labeling scheme

Span-by-span segment definition

Cantilever tendon definition and layout

Tendon anchors and ducts layout

  • New solid concrete girder deck section.

Concrete solid girder deck section definition

  • Nonprismatic variation of concrete U-girder sections.

Nonprismatic U-girder bridge with cutaway to show horizontal bracing

  • Section designer now allows prestress tendons to be defined for any concrete sections.

Concrete section with prestress tendons.

  • Standard vehicles are now defined in XML libraries, allowing users to create their own custom libraries.

HL-93S vehicle from the AASHTO vehicle library

  • Standard precast concreate I, U, and bulb-tee girders are now defined in XML libraries, allowing users to create their own custom libraries.

Caltrans CA TUB73 precast-U girder from the Caltrans frame section library

Analysis

  • Horizontal influence-based moving loads for braking/acceleration and centrifugal

Influence surface for transverse moving load and wheel reactions due to centrifugal force.

Vehicle horizontal loading definition

Design

  • Superstructure design according to AASHTO LRFD 2014 (7th Edition), including the 2015 interim revisions.

Superstructure design preferences showing supported design codes

  • Superstructure rating 2014 and 2015 interim revisions according to AASHTO.

Rating preferences showing supported interim revisions to AASHTO Rating 2010

Output and Display

  • Superstructure displacements for the entire section along the layout line and for individual girders or webs along their individual lines.

Girder response plot showing 10th point displacements

  • Scale factors are now available for time-dependent creep, shrinkage, and stiffness of concrete, as well as relaxation of tendons.

Concrete material time dependent properties

Release Date: 01 Oct 2014

CSiBridge 2015 17.1.0 and 17.1.1 Enhancements

The following Enhancements have been implemented for CSiBridge v17.1.0 and 17.1.1:

  • The window refresh speed for Classical Plus graphics has been improved.
  • The speed of analysis has been increased.
  • Other minor enhancements.
Release Date: 06 Aug 2014

CSiBridge 2015 Enhancements

The following Enhancements have been implemented for CSiBridge 2015 v17.0.0:

  • The responsiveness of the user interface has been improved.
  • The DirectX graphics functionality has been enhanced.
  • A friction-spring hysteretic damper has been implemented as a new link property. The force-displacement relationship exhibits linear slipping stiffness when loading, but unloads with a smaller slipping stiffness. A pre-compression displacement and a displacement stop-limit may be specified.
  • A bilinear Maxwell damper has been implemented as a new link property. This device is a linear spring in series with a dashpot whose force-velocity relationship exhibits bilinear viscous behavior, typical of certain oil dampers having a relief valve.
  • Improved convergence behavior and increased speed for nonlinear static and direct-integration time-history analysis.
  • Increased speed of moving load analysis by parallelization.
  • Superstructure design checking has been extended to include composite bridge superstructures with steel U-girders according to the Canadian CAN/CSA-S6-06 code.
  • Superstructure design checking has been extended to include composite bridge superstructures with steel U-girders according to the Indian IRC-2011 code.
  • Superstructure design checking has been implemented for concrete superstructure sections according to the Russian SNiP 2.05.03-84 code. Superstructure types supported include prestressed concrete box girders and composite sections with precast I-girders and U-girders.
  • Superstructure design reports have been enhanced to include step-by-step detailed output, including equations and code references. These are currently available for AASHTO LRFD 2007 and 2012, for multi-cell concrete box shear and flexure checks and precast composite I-beam shear and flexure checks.
  • A traditional menu has been added as an alternative to the ribbon. Users can switch between the two options.
  • The ribbon style has been updated to be similar to current Microsoft applications.
  • Other minor enhancements.
Release Date: 08 Jan 2014

CSiBridge 2014 V16.1.0 Enhancements

Significant enhancements included in CSiBridge 2014 (v16.1.0):

  • Superstructure design checking has been implemented for steel superstructure sections according to the Indian Roads Congress code IRC:22-2008. Superstructure types supported include steel I-girders and hybrid I-girders with composite concrete deck.
  • Superstructure design checking has been extended to include composite bridge superstructures with steel U-girders according to the "Eurocode EN 1994-2" code (EN 1994-2:2005, Eurocode 4: Design of composite steel and concrete structures - Part 2: General rules and rules for bridges).
  • Superstructure design checking has been updated according to the AASHTO LRFD Bridge Design Specifications, 6th Edition, 2013 Interim Revisions. In addition, AASHTO bridge rating accounts for the 2013 interim revisions, and AASHTO seismic bridge design accounts for the 2012 and 2014 interim revisions.
  • Concrete frame design is now available according to Eurocode 2-2004, including Eurocode 8-2004 seismic requirements.
  • Steel frame design is now available according to Eurocode 3-2005, including Eurocode 8-2004 seismic requirements.
  • An enhancement has been implemented for defining tendons in the Bridge Modeler where the options to move and copy tendons now take into account any existing parametric variations that affect the location and inclination of the girders.
  • The specification of the notional size used for time-dependent creep and shrinkage analysis has been enhanced to now be specified with the frame and shell section properties instead of with the material property.
  • A new staged-construction operation “Change Section & Age” is now available allowing specification of the “Age at Add” when changing frame sections or shell sections.
  • The bridge modeler now allows individual bridge objects to be locked to prevent updating their linked models.
  • Table output can now request the correspondence between the response components at a single location for additive-, range-, and enveloping-type load combinations. Results that admit correspondence includes most displacement, force, and stress response quantities.
Release Date: 02 Oct 2013

CSiBridge 2014 V16.0.1 and V16.0.2 Enhancements

CSiBridge 2014 V16.0.1 and V16.0.2 Enhancements

Significant enhancements include:

  • Multiple grid systems can be displayed at the same time
  • Multiple mass sources can be defined for modeling alternative dynamic behavior
  • Display of frame design D/C ratios can be limited by a specified threshold value
  • Shear stress, von Mises stress, and principal stress response is now available for certain frame sections
  • Shell stresses can now be displayed normalized by material strength
  • Bearing pressure on shells from area springs can now be displayed
  • Bridge seismic design report can now be automatically generated by the program or by using a user-defined XML contents file
  • Import and export of files using the IFC 4 format is now supported
Release Date: 07 Aug 2013

CSiBridge V16.0.0 Enhancements

CSiBridge V16.0.0 Enhancements

Significant enhancements included in CSiBridge 2014 v16.0.0 , besides bug fixes:

  • The memory capacity of the graphical user interface has been increased to handle larger models. 
  • A new link property has been added to model triple pendulum isolators (bearings). 
  • A new frame section property type has been added to model hybrid built-up steel U-girders. 
  • Tendons can now be used to model straight external tendons. 
  • New built-in materials have been added for ASTM A709 (steel) and ASTM A772 (tendon). 
  • The precast I-girder deck section now permits the use of nonprismatic girders and staggered diaphragms. 
  • A new bridge section type has been added to represent composite steel U-girder superstructure sections. 
  • Superstructure design has been added for the AASHTO LRFD Bridge Design Specifications, 6th Edition, 2012. 
  • Steel superstructure design has been added for Eurocode EN 1994-2. 
  • Steel superstructure design has been added for the Canadian CAN/CSA- S6-06 code. 
  • Concrete superstructure design has been added for the India Roads Congress IRC:112-2011 code. 
  • U-section steel-girder composite bridge superstructure design has been added for AASHTO LRFD 2007 and 2012. 
  • Automated bridge seismic design is now available for steel columns. 
  • Automated bridge seismic design is now available for bridges crossing fault-rupture zones according to Caltrans Memo to Designers 20-8. 
  • Automated bridge seismic design has been updated to AASHTO Guide Specifications for LRFD Seismic Bridge Design, 2nd Edition, 2011. 
  • Bridge load rating has been added for AASHTO The Manual for Bridge Evaluation, 2nd Edition, 2011. 
  • Load combinations have been added for bridge design according to the Indian IRC:6-2010 code. 
  • Response spectrum functions have been added for the AASHTO 2012 code. 
  • Automated lateral loading has been added for the IBC 2012 code. 
  • Automated lateral loading has been added for the Italian NTC 2008 code.
  • Automated lateral loading has been added for Turkish TSC 2007 and TS 498-97 codes.
  • Steel frame design has been added for AISC 360-10 and AISC 341-10 codes.
  • Concrete frame design has been added for the ACI 318-11 code.
  • Other minor enhancements. 
Release Date: 05 Jan 2012

CSiBridge V15.2.0 Enhancements

Significant new features:

  • Design checking has been implemented for concrete superstructure sections according to the "Eurocode EN 1992-2" code (EN 1992-2:2005, Eurocode 2: Design of concrete structures - Part 2: Concrete bridges - design and detailing rules). Superstructure types supported include prestressed concrete box girders and composite sections with precast I-girders and U-girders. Separate design checks are provided for stress, flexural strength, and shear strength using MCFT (modified compression field theory). The effect of mild reinforcing is included as well as the prestress tendons. Live-load distribution factors can be specified by the user or determined from detailed 3-D live-load analysis. Design results are displayed graphically for the entire box section, or on a girder-by-girder basis for multi-celled box girders and composite sections. Detailed tables showing all results and intermediate values are available for display, printing, and export to Excel or Access.
  • Load combinations and design load types have been added for bridge design according to the code EN 1991-2:2003, Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges.
  • Vehicle loads have been added bridge design according to EN 1991-2:2003, Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges.
  • Standardized vehicles are now categorized by Region and Standard, making it easier to add and modify new vehicle loads.
  • A vehicle class is now automatically created for each vehicle so that the user only needs to create vehicle classes when multiple vehicles are to be enveloped.
  • For the optimization of steel-girder bridge design, the "As Designed" location of web stiffeners last used for recalculating the resistance is now saved if the model is unlocked or saved as a new model when closing the optimization form.
  • Steel frame section properties for the AISC Shapes Database Version 14.0 are now available in the section-property database files for U.S Customary and metric units.
  • The definition of material properties has been enhanced to allow user-defined standard materials through the use of XML files. Properties are segregated by region and by code-standard within these files as well as when using the materials in the graphical user interface.
  • New Chinese materials are now available to define concrete, steel, rebar, and tendon properties according to JTG, TB, and GB standards.
  • Concrete materials are now available having properties consistent with the Spanish code "EHE - Instrucción de Hormigón Estructural.
  • Italian material definitions have been added for: (1) Concrete according to standard UNI EN 206-1:2006 and UNI 11104:2004, (2) Steel and rebar according to standard NTC2008.
  • Other minor enhancements.
Release Date: 28 Aug 2011

CSiBridge V15.1.1 Enhancements

Significant new features:

  • User-defined stress points may now be specified for Section Designer frame sections.
  • Plotting of bridge superstructure results now includes an option to show the hyperstatic (or secondary) forces and moments acting on the superstructure cross-section for load cases and combos representing prestressing load.
  • The OAPI (Open Application Programming Interface) has been changed so that multiple instances of CSiBridge can now be started from an external program or script.
  • New functionality has been added to the Open API (Open Application Programing Interface) for the design codes.
Release Date: 16 Jun 2011

CSiBridge V15.1.0 Enhancements

Significant New Features

  • Built-in European concrete and steel material properties.
  • Display and output of frame stresses.
  • Load optimization feature to determine the optimal loading scale factors to achieve goals and limits on displacement and force response throughout the structure.
  • Canadian NBCC 2010 loading for wind, seismic, and response-spectrum.
  • American ASCE-7 loading for wind, seismic, and response-spectrum.
  • Italian NTC 2008 response-spectrum functions with geographic database.
  • Specialized bridge groups may now be specified within each bridge object. Each bridge group applies to a particular type of component (slab, girder, bearing, etc.) and an individual bridge object. Depending on the bridge group type, groups may be defined for multiple items, multiple longitudinal ranges, and/or multiple transverse ranges.
  • The specification of rebar for the bridge object superstructure has been enhanced. Distances are now measured along each individual girder. Longitudinal rebar is located relative to the center of the supports or the centers of the girder spans, and shear rebar is located relative to the ends of each girder span.
  • A new design request type has been added for steel I-girder composite bridge superstructures to account for the constructability check according to the "AASHTO LRFD 2007" code, including the 2008 interim provisions. Composite and non-composite behavior can both be considered, with or without using staged-construction analysis.
  • Bridge load rating has been added for steel I-girder composite bridge superstructures according to the AASHTO "Manual for Bridge Evaluation", First Edition, 2008. Separate rating requests are provided for the service and strength checks of both composite and non-composite superstructures. Live-load distribution factors can be automatically calculated using code formulae, specified by the user, or determined from a detailed 3-D live-load analysis.
  • For flexural-strength superstructure design checks by the AASHTO LRFD 2007 code, the effect of user-specified reinforcement is now included for the prestressed box-girder and precast-girder composite sections. Previously only the effect of the concrete and tendons were included in these checks. The effect of reinforcement for the slab of steel-girder composite sections was already being considered.
  • Design checking has been implemented for concrete superstructure sections according to the Canadian "CAN/CSA-S6-06" code. Superstructure types supported include prestressed concrete box girders and composite sections with precast I-girders and U-girders. Separate design checks are provided for stress, flexural strength, and shear strength using MCFT (modified compression field theory). The effect of mild reinforcing is included as well as the prestress tendons. Live-load distribution factors can be automatically calculated using code formulae, specified by the user, or determined from detailed 3-D live-load analysis.
  • Automated load combinations and design load types have been added as required for bridge design according to the Canadian code CSA-S6-06.
  • Canadian steel frame building design code CSA S16-2009.
  • Other minor enhancements.
Release Date: 04 Jan 2011

CSiBridge V15.0.1 Enhancements

Significant New Features

  • A new option has been added for the modeling of I-girders in composite steel-girder superstructure sections. In addition to the existing options to model the I-girders as frame objects or as area objects (for both web and flanges), the girders can now be modeled using area objects for the webs and frame objects for the flanges.
  • A new bridge seismic design check has been added to the Chinese version that follows the Chinese code JTG/T B02-01-2008, "Guidelines for Seismic Design of Highway Bridges".
  • Bridge design for prestressed concrete box girder superstructures using Chinese code “JTG-D62-2004” in the Chinese version has been updated as follows: (1) The effect of existing longitudinal rebar is now accounted for in flexural design. (2) A new design check has been added for tendon stress.
  • The Chinese 2002 building design codes are available for concrete and steel frame design in the Chinese version.
  • Concrete frame design has been enhanced to improve the smoothing of P-M-M interaction surfaces in those rare cases where they become non-convex due to kinks in the P-M curves.
Release Date: 01 Sep 2010

CSiBridge V15 Enhancements

Computers and Structures, Inc. is proud to release CSiBridge, a new comprehensive state-of-the-art software product for the structural and seismic analysis, design, and rating of simple and complex bridges. All operations are integrated across a single user interface that provides an easy-to-use and intuitive workflow environment. Bridge models are created parametrically resulting in enhanced productivity, saving engineering time while redefining the standards of accuracy and versatility.

Please contact sales@csiberkeley.com or (510) 649-2201 for more information.

Significant New Features

Bridge Wizard

  • Step-by-step creation of complete bridge model
  • Detailed guidance for each step
  • Tree view of bridge model updated with each change
  • Automatically update model by changing parameters


Bridge Object Model

  • Switch between spine, shell, and solid models with single click
  • Parametric modeling of steel and concrete deck sections
  • Concrete and steel diaphragms
  • Restrainers and bearings
  • Linear/nonlinear foundation springs
  • Non-prismatic superstructure variation
  • Skewed abutments, bents, and hinges
  • Single-bearing & double-bearing bents
  • Prestress tendon layout
  • Superelevation
  • Curved beams and girders
  • Diaphragms and staggered cross-frames


Bridge Modeling Options

  • Abutments may be modeled as bents
  • Bearing properties and location may be user defined
  • Kinematic effects due to abutment and bearing geometries are included
  • Bridges may be analyzed as full 3D-shell or spine models


Layout Lines

  • Quick definition of highway layout
  • Bearings and stations notation
  • Horizontal and vertical curves
  • Spiral transitions


Section Designer

  • Arbitrary steel, concrete, or composite sections
  • Caltrans sections
  • Calculation of section properties
  • Automated fiber layout for fiber hinges
  • PMM interaction surfaces
  • Moment-curvature relationships


Parametric Deck Sections

  • Concrete box girders
  • Full parametric definition of cross sections
  • Concrete tee beam sections
  • Precast I and U girder sections
  • Steel girders with composite deck
  • Variable section definition parameters


Lanes and Vehicles

  • Lanes based on layout lines or frames
  • Width effects for lanes and vehicles
  • Auto transfer of vehicle loads to bridge structure
  • Extensive vehicle library including AASHTO and other codes
  • Custom vehicles


Post-tensioned Box Girders

  • Quick tendon layout
  • Tendons in frames, shells, and solids
  • External tendons
  • Secondary force calculation
  • Creep, shrinkage, relaxation, anchorage slip, elastic shortening losses
  • Explicit time-dependent effects in tendons
  • Automatic location of tendons in girders


Foundation Modeling

  • Pile or spread footings
  • P-Y multi-liner force deformation assignments
  • Compression only soil springs
  • Grade beams as line springs
  • Soil springs properties may be linear on nonlinear


Loading and Analysis

  • Moving loads with 3-D influence surfaces
  • AASHTO, Chinese, or user-defined nonlinear temperature gradients
  • Multi-step static and dynamic moving load analysis
  • Response spectrum and time-history analysis
  • Geometric and material nonlinearity
  • Pushover analysis
  • Buckling analysis
  • Multi-support base excitation
  • Response spectrum and time-history analysis
  • Parametric loading of superstructure
  • Live load distribution by code or analysis
  • True dynamic effects of moving live loads
  • High frequency blast dynamics using Wilson FNA


Bridge Analysis Options

  • Speed and power of the SAPFire engine
  • Large Capacity Eigen and Ritz model analysis
  • 3D Pushover Analysis
  • Multi Support Excitation Dynamics
  • Energy Dissipation Designs
  • Buckling Analysis
  • Staged Construction
  • Linear and Nonlinear Dynamic Analysis


Staged Construction

  • Segmental, composite, and other bridge types
  • Gantt chart construction scheduler
  • Creep, shrinkage, and strength change
  • Camber calculation and shape finding
  • Automatic cable tensioning
  • Add/remove elements and loads, change section properties, change supports, modify frame end releases


Cable Stayed Bridges

  • Automatic cable shape finder
  • P-Delta plus large displacement geometric nonlinearity
  • Cable target force determination
  • Full 3D gravity, wind and seismic analysis capabilities
  • Multiple point excitation for time-history analysis
  • Large deformation catenary cable analysis
  • Automatic jacking and cable-tensioning control
  • Shape-finding for camber calculation


Influence Surfaces

  • 3D Influence surface plots for joints, frames shells and links
  • Influence line or surface plots for joint displacement or reactions
  • Plots as contours
  • Plots along lane center or lane widths


Bridge Design

  • Bridge Superstructure Design:
    • Composite Steel Girder (AASHTO LRFD 2007 and 2008 interims)
    • Precast I and U Girder (AASHTO LRFD 2007)
    • Concrete Box Girder (AASHTO LRFD 2007)
    • Principal stress checks
  • Automatic load combinations
  • Design checks include:
    • Stress checks
    • Shear checks
    • Flexure checks
    • Principal stress checks 


Results and Output

  • Animated displacement and stress plots
  • Graphical results on screen
  • Tabular output to Microsoft Excel
  • Analysis and Design report in Microsoft Word format


Bridge Rating

  • Concrete box girder bridges (AASHTO LRFR 2005)
  • Precast I and U girder bridges (AASHTO LRFR 2005)


Bridge Animations

  • Create real time movie files showing time-history and moving vehicle responses
  • Include multiple vehicles
  • Displays may include displacements and stresses


Step-by-step seismic design of bridges per AASHTO Seismic Design Guide