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Exclusive Distributor in the Middle East for CSI Software licensing,

technical support and training solutions – www.techiesoft.com For Sales: sales@techiesoft.com For Technical Support: support@techiesoft.com

Integrated 3D Bridge Design Software

CSiBridge Features:

User Interface

One Window, Many Views

CSiBridge offers a single user interface to perform: MODELING, Analysis, Design, Scheduling,

Load Rating, and Reporting.

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CSiBridge Features:Modeling

Templates

CSiBridge OFFERS a selection of templates for quickly starting a new bridge model or

structure. This is often a good starting point to creating a model as the template can be

modified later.

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Interactive Database Editing

Interactive database editing allows users to edit model data in a table view which simplifies

the task of making CHANGES to the model. Tables are easily exportable and importable from

Microsoft Excel and Microsoft Access.

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CSiBridge Features:Parametric Bridge Modeling

Bridge Object Model

The bridge object MODEL is a comprehensive assemblage of components that make up the

entire bridge model. The parametric model is managed through the bridge object model.

This includes: the modeling of deck sections, diaphragms, bearings, restrainers, foundation

springs, superstructure variation, abutments, bents, hinges, tendon layouts, and more.

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Bridge Wizard

The Bridge Wizard is a powerful tool that guides users step-by-step through the creation of a

complete bridge MODEL with instructions at each step to ensure that all of the necessary

components are defined in the model.

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Layout Lines

Layout lines define the highway layout of the bridge. They can be defined within CSiBridge

using bearing and station notation, or they can be IMPORTED using a TransXML file. As

layout lines are modified, the entire bridge structure and its parametric geometry is

updated.

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Superstructure Deck Sections

CSiBridge has a wide array of parametric deck sections INCLUDING concrete box girders,

precast I and U girders, steel boxes, and steel girder bridges. All deck sections are

parametrically configurable for an accurate bridge deck section definition.

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Substructure

Bridge substructures can very accurately be MODELED in CSiBridge. Bents, abutments,

restrainers, bearings and foundation springs are all elements that can be defined as either

link or hinge elements.

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Diaphragms

Diaphragms may be located at the supports and along the spans. Types INCLUDE concrete,

steel girder, and detailed steel cross-frames. These may be skewed and staggered. Interior

cross frames for steel U-girders may also be specified.

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Post-Tensioning

Define post-tensioning in CSiBridge using the REFINED options for laying out tendons and

forces. When defining box girders, CSiBridge will automatically assign the drape locations

within the tendon; the engineer can edit them as well.

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Parametric Variations

CSiBridge allows variations for the entire bridge or just parts of the bridge alignment and

slope, for both horizontal or vertical variations of the deck section. Defining variations

parametrically significantly reduces the amount of time spent on the MODELING process.

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Lanes

Quickly define the lanes based on the layout lines of the bridge. The lanes can be defined

such that the width of each lane is wider than the design vehicle. Enveloped response results

can be defined later to accurately MODEL vehicle loads on the bridge.

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CSiBridge Features:Structural Components

Joints

CSiBridge automatically creates joints at structural object intersections or internal joints

when meshing structural objects. Joint coordinates and INFORMATION may be displayed on

screen in the model window or in tabular format.

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Frames

The frame element uses a general, three-dimensional, beam-column formulation which

includes the EFFECTS of biaxial bending, torsion, axial deformation, and biaxial shear

deformations. CSiBridge has a built-in library of standard concrete, steel, and composite

section properties of both US and International Standard sections.

Intermediate joints will automatically be generated where other members intersect with the

frame to ensure finite element CONNECTIVITY.

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Tendons

In CSiBridge, Tendons are easily drawn as INDEPENDENT objects, with geometry specified as

straight lines, parabolas, circular curves, or other arbitrary shapes. They can also be defined

parametrically to drape inside of a box girder. Tendon loads, including all losses, are easily

defined.

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Cables

The cable element is a highly nonlinear element used to model the catenary behavior of

slender CABLES under their own self-weight. They are particularly useful in modeling

suspension bridges or cable-stayed bridges.

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Shells

The shell element is a type of area object that is used to MODEL membrane, plate, and shell

behavior in planar and three-dimensional structures. The shell material may be

homogeneous or layered throughout; material nonlinearity can also be considered when

using the layered shell.

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Solids

The solid element is an eight-node element for MODELING three-dimensional structures and

solids. It is based upon an isoparametric formulation that includes nine optional

incompatible bending modes and is useful for modeling objects in which loading, boundary

conditions, section properties, or reactions vary by thickness.

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Links

A link element may exhibit linear, nonlinear, and frequency dependent behavior. The

following link elements are available in CSiBridge: Linear, Multi-linear Elastic, Multi-linear

Plastic, Gaps, Hooks, DAMPERS, FRICTION Isolators, Rubber Isolators, T/C Isolators,

Frequency-dependent Springs, and Frequency-dependent Dampers.

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Hinges

Users can create and apply hinge properties to perform pushover analyses in CSiBridge.

Nonlinear material behavior in frame elements (beam/column/brace) can be modeled using

fiber hinges. This approach represents the material in the cross section as discrete points,

each following the exact stress-strain curves of the material. MIXED materials, such as

reinforced concrete and complex shapes can be represented.

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Springs

Spring supports are link elements that are used to elastically connect joints to the ground

and can be linear or nonlinear in nature. Nonlinear support conditions can be modeled to

include gaps (compression only), multi-linear elastic or plastic springs, viscous dampers, and

base isolators. Advanced modeling capabilities allow foundations to be included with the

superstructure, including piles and spread FOOTINGS. P-Y multi-linear force deformation

parameters and compression-only soil springs can be defined.

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Vehicle Loads and Classes

Vehicles are used to define the moving loads in CSiBridge and are most often defined to act

on the traffic lanes. There are standard types of vehicles in the program, or users can design

unique vehicles using the general vehicle SPECIFICATION. Vehicle classes are sets of one or

more vehicles that can be assigned to act on lanes in a moving-load case.

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Load Patterns

A load pattern is a specified spatial distribution of forces, displacements, temperatures, and

other effects THAT act upon the structure.

Parametric Loading

Superstructure loads may be defined and assigned to a bridge object model parametrically.

Bridge Object loads may be assigned for any defined load pattern type and may include

loads due to wearing SURFACES, parapets, forms, diaphragms, girders, decks and more.

Once the parametric bridge object loads have been defined they may be easily displayed and

modified.

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Parametrically defined load ASSIGNMENTS are preserved even when changes are made to

the bridge object discretizations, deck types or alignments.

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CSiBridge Features:Analysis

Overview

CSI Solvers have been tried and tested by the industry for over 35 years. The SAPFire

Analysis ENGINE can support multiple 64-bit solvers for analysis optimization and perform

both Eigen Analysis and Ritz Analysis.

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Moving Load

Moving load analysis is available in CSiBridge to compute influence lines and SURFACES for

traffic lanes on bridge structures and to analyze these structures for the response due to

vehicle live loads. Vehicles can also be moved in a multi-step analysis. This can use either

multi-step static load cases or time-history load cases, the latter of which can be linear or

nonlinear.

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Buckling

Linear (bifurcation) buckling modes of a structure can be found under any set of loads.

Buckling can be calculated from a nonlinear or staged-construction state. Full nonlinear

buckling analysis is also available considering P-delta or large deflections effects. Snap-

through buckling behavior can be captured using static analysis with displacement

CONTROL. Dynamic analysis can be used for modeling more complex buckling, such as

follower-load problems.

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P-Delta

P-delta analysis captures the SOFTENING effect of compression and the stiffening effect of

tension. A single P-delta analysis under gravity and sustained loads can be used to modify

the stiffness for linear load cases, which can later be superposed. Alternatively, each

combination of loads can be analyzed for full nonlinear P-delta effects. P-delta effects are

included for all elements and are seamlessly integrated into analysis and design.

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Pushover

Pushover analysis features in CSiBridge include the implementation of FEMA 356 and the

hinge and fiber hinge option based on stress-strain. The nonlinear layered shell element

enables users to consider plastic behavior of concrete shear walls, slabs, steel plates, and

other area finite elements in the pushover analysis. Force-deformation RELATIONS are

defined for steel and concrete hinges.

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Dynamic

CSiBridge dynamic analysis capabilities include the calculation of vibration modes using Ritz

or Eigen VECTORS, response-spectrum analysis, and time-history analysis for both linear and

nonlinear behavior.

Eigen-vector modal analysis finds the natural vibration modes of the structure, which can be

used for understanding the behavior of the structure, and also as the basis for modal

superposition in response-spectrum and modal time-history load CASES. Ritz-vector modal

analysis finds the optimum modes for capturing structural behavior in response-spectrum

and modal time-history load cases, and is more efficient for this purpose than Eigen-vector

analysis.

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Time Dependent

Staged construction is a type of nonlinear analysis in CSiBridge THAT allows you to define a

sequence of stages wherein you can add or remove portions of the structure, selectively

apply load to portions of the structure, and to consider time-dependent material behavior

such as aging, creep, and shrinkage.

Staged CONSTRUCTION is variously known as incremental construction, sequential

construction, or segmental construction.

Steady State

Steady state analysis is available to determine the response of the structure due to cyclic

(harmonic, sinusoidal) loading over a range of frequencies. Frequency-dependent stiffness

and damping (complex impedance) properties may be included for modeling foundations

and far-field effects, including RADIATION damping. Steady state analysis can be used to

measure the effects of multiple machines operating at different frequencies by combining

the results of several analyses in the same model.

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Target Force

During nonlinear static analysis, cable and frame elements can be automatically STRAINED

to achieve specified target axial force values. This is most commonly used to tighten cables

to pre-specified tensions, but it can also be used to jack structures to a specified force using

frame elements.

Load Combinations

CSiBridge allows for an unlimited number of load CASES and combinations. Load

combination types include: linear additive, envelope (min/max), absolute add, SRSS, and

range combinations. Combination components can include other combinations.

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CSiBridge Features:Design

Steel Frame

Fully integrated steel frame DESIGN includes member size optimization and implementation

of design codes. CSiBridge allows users to interactively view design results at any frame

member, change the parameters or section properties, and display the updated member

results.

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Concrete Frame

Fully integrated concrete frame DESIGN in CSiBridge includes: required area of steel

calculations, auto selection lists for new member sizing, implementation of design codes,

interactive design and review, and comprehensive overwrite capabilities.

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Superstructure

CSiBridge will perform the superstructure DESIGN for the following bridge superstructure

types and codes:

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Automated Seismic

Engineers can define specific seismic design parameters to be applied to the bridge MODEL

during an automated cycle of analysis through design. The new AASHTO seismic design

specification has been incorporated into CSiBridge, including pushover analysis for seismic

category D.

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CSiBridge Features:Load Rating

Load Rating Overview

CSiBridge load RATING CALCULATES the safe load capacity of a bridge based on the

requirements of the AASHTO Manual for Condition Evaluation and Load and Resistance

Factor Rating (LRFR) of Highway Bridges October 2003 with 2005 Interim Revisions and the

Manual for Bridge Evaluation Second Edition 2011 with 2013 Interims.

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CSiBridge Features:Output and Display

Deformed Geometry

Users can display deformed geometry based on any load or combination of loads, as well as

ANIMATIONS of modes.

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Force Diagrams

Shear and moment diagrams display internal shear forces, moments, and displacements at

all locations along the length of a frame element for any load case or load combination.

CSiBridge gives the option to scroll along the length to display values or scroll DIRECTLY to

the maximum value location.

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Bridge Reponses

In CSiBridge, moving load response is CALCULATED for all joints and elements. For each of

the following types of response, you may request a group of elements for which the

response should be calculated: Joint displacements, Joint reactions, Frame forces and

moments, Shell stresses, Shell resultant forces and moments, Plane stresses, Solid stresses

and Link/support forces and deformations.

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Influence Surfaces

An influence surface can be viewed as a curve of influence values plotted at the load points

along a traffic lane. For a given response quantity (force, displacement, or stress) at a given

location in the structure, the influence value plotted at a load point is the value of THAT

response quantity due to a unit concentrated downward force acting at that load point.

Animations

CSiBridge allows users to animate results of vehicles and other loads on the bridge MODEL

to help understand bridge behavior. Create movie files showing time-history and moving

vehicle responses, including multiple vehicles.

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CSiBridge Features:Reporting

Report Generation

Pre-formatted printed reports are now available at the push of a button. These reports

include all pertinent model data and the results of analysis and design. Data is presented in

tabulated format, along with graphics, table of contents, and a cover sheet displaying project

information and your company name and logo.

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CSiBridge Features:Tools

Load Optimizer

The load optimizer is a tool in CSiBridge to compute the optimal load application to achieve

desired structural response. Loads may BE applied linearly, nonlinearly, or in staged-

construction. Goals and limits may include displacements, forces, moments, and more.

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Section Designer

Section Designer is a utility that is built into CSiBridge. It allows users the ability to create

specialized sections of any arbitrary shape and material, including rebar layout. All section

properties, biaxial interaction diagrams, and moment curvature diagrams are automatically

CALCULATED.

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CSiBridge Features:Import and Export

Supported Formats

CSiBridge supports many industry standards for importing and exporting data. LANDXML,

AutoCAD (DXF/DWG), CIS/2, IFC, and SDNF are all supported. CSiBridge also supports

exporting of a MODEL to an Microsoft Access database. If users are using other analysis

packages, CSiBridge can import files from FrameWorks Plus, IGES, STAAD, and STRUDL.

CSiBridge Compare Levels:

CSiBridge is available in four levels:

Plus, Plus with rating, advanced, and Advanced with Rating

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