Software Specification

LUSAS Bridge

A feature-rich, bridge analysis system for all types of general analysis with beam, shell and solid elements.

Analysis capabilities

• Linear static stress analysis
• Linear buckling
• Linear cable tuning
• Natural frequency / eigen analysis
• Linear dynamics including forced response
• Interactive Model Dynamics
• Fatigue analysis

Includes these software options for new orders:

• Fast solvers
• Vehicle load optimisation

And when used with these purchased software options also allows:

• Steel frame design
• RC frame design
• Steel and composite deck design to Eurocodes

• Advanced Interactive Modal Dynamics (IMD Plus)

See below for more details.

Comprises:

• All elements, material models, modelling, analysis and results processing capabilities included in LUSAS Bridge LT

And in addition:

• An advanced high-performance element library including:

• Bars
• Thick and thin beams
• Grillage
• Plane stress/strain continuum
• Axisymmetric solid continuum
• Solid continuum
• Plate flexure (thick + thin)
• Flat thin membranes
• Flat thick + thin shells
• Axisymmetric membranes
• Axisymmetric thin shells
• Generalised joint/springs/gaps

• Advanced material models including:

• Isotropic including plastic, creep, damage, shrinkage, viscous, two-phase
• Orthotropic including plastic, creep, damage, shrinkage, viscous, two-phase
• Anisotropic and rigidity models
• Temperature dependency

• General 

• Multiple model and results viewing windows
• Multiple Treeframe capability
• Advanced LUSAS solver options
• Import / export of CAD, LUSAS, and other data formats
• Picture saving to BMP, JPG, WMF formats
• Selection memory facility
• Browse and cycle screen selections
• LUSAS Programmable Interface (LPI) command bar

• Geometry creation

• Point, line, surface and volume geometry creation
• Extended geometry construction options including splines, tangents, sweeping, intersecting, manifolding, merging etc.
• Merge geomtery facility
• Shape wizard
• Boolean geometry creation including intersections, unions, subtraction and slicing of model data
• Slice through geometry

• Attributes

• Point, line, surface and volume mesh creation
• Point joint elements
• Standard steel section libraries for selected countries
• User-defined line, surface and joint geometric properties
• User-defined orthotropic, anisotropic, joint, rigidities, mass and specialised material properties
• Extended structural supports including hinge rotation and pore water pressure
• Extended structural loadings including face, stress and strain, initial velocity and acceleartion, prescribed velocity and acceleration
• Constraint equations
• Thermal surfaces
• Retained freedoms
• Damping
• Influence facility
• Search areas
• Age facility
• Design strength plotting facility

• Utilities

• Mesh lock facility
• Transformation datasets
• Variations
• Fatigue
• Interactive Modal Dynamics
• Design factor plotting
• Fourier analysis
• Background meshing grid facility
• Slice sections in 3D
• Automatic arbitrary section property calculator
• Precast concrete sections for selected countries

• Bridge specific features

• Grillage wizard
• Precast sections of country-specific concrete beams
• Box section generator
• Static vehicle, lane, and knife edge loading for selected country codes
• Moving load generator
• Vehicle load optimisation interface
• Linear cable tuning facility
• Influence analysis capability
• Prestress / Post-tensioning facility
• Rail track analysis link
• RC slab / wall design facility to indicate flexural reinforcement requirements
• Steel and composite deck design link
• Calculation of crack widths to EN1992-1
• Construction table facility

LUSAS Bridge software options

Included for new orders:

Fast Multifrontal Solvers

• Fast Multifrontal Direct Solver
• Fast Multifrontal Block Lanczos Eigensolver
• Complex Eigensolver
• Fast Parallel Direct Solver
• Fast Parallel Iterative Solver

Vehicle Load Optimisation

• Rapidly reduces load assessment times
• Extends vehicle loading capabilities of LUSAS Bridge
• Identifies critical vehicle and train (rail) loading patterns for a selected design code

Available for purchase to increase the analysis and design capabilities of LUSAS Bridge:

Steel Frame Design

• Design code-based results visualised as Utilisation ratios on members
• Design summary results produced for selected members and loadcases
• Generate formatted design reports, showing calculations made and referencing clauses and equations from chosen code

RC Frame Design

• Design checking of regular and arbitrary shaped reinforced concrete members subject to bending and axial force
• Design code-based results visualised as Utilisation ratios on members
• Produce a tabular summary of results for selected members and loadcases, view detailed results and generate interation diagrams

Steel and Composite Deck Designer

• Carries out design checks for multiple sections on steel/composite bridge decks to the Eurocodes

IMDplus Analysis

• Multiple event assessment
• Linear dynamics effects

LUSAS Bridge upgrade options

• LUSAS Bridge plus - for nonlinear, dynamic, field/thermal analysis problems