LUSAS Bridge plus

An extended bridge analysis system which includes all of the elements, material models, modelling, analysis and results processing capabilities of LUSAS Bridge and has additional advanced elements and increased analysis capabilities.

Analysis capabilities

• Linear static stress analysis
• Linear buckling
• Natural frequency analysis
• Linear dynamics including forced response
• Interactive Model Dynamics
• Fatigue analysis
• Nonlinear analysis *
• Dynamic analysis *
• Thermal / Field analysis *
• Heat of hydration analysis *
• Advanced Interactive Modal Dynamics*
• Rail track analysis*
• Vehicle load optimisation*
• Fast Solving capability*

* when used with the appropriate LUSAS Bridge plus option(s)]

Comprises:

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

And in addition:

• An extended advanced high-performance element library

Including:

• Curved bars
• Curved thick + thin beams (including curved cable capability)
• Curved thin semiloof shells
• Curved thick + thin shells
• Curved solids (high order)
• Axisymmetric solid continuum with non-axisymmetric loading

• Specialised material models including:

• CEB-FIP Model code 1990
• Concrete creep Chinese code
• User-defined models and others

• Fast Iterative Solver Technology

• Fast solver

• Attributes

• Specialised materials
• Slideline contact modelling
• Birth and death facility for staged construction analysis
• Age facility

• Utilities

• Variation of loading using load curves
• Fourier analysis

LUSAS Bridge plus software options

The finite element analysis capabilities of LUSAS Bridge plus can be extended by using any of the following product options:-

Nonlinear Analysis

• Large displacement, large rotation and large strain geometric nonlinearities
• Material nonlinearity including plasticity, concrete, damage, volumetric, geotechnical, rubber, creep, temperature dependent, and user supplied models
• Incremental, iterative (MNR or NR), line search and arc length solution procedures
• Follower forces
• Slideline/slidesurface contact algorithms

Dynamic Analysis

• Spectral and forced response
• Modal or Rayleigh damping
• Transient dynamics
• Automatic time step selection
• Nonlinear dynamics
• Time dependent materials and loading

Thermal / Field Analysis

• Steady state and transient
• Linear, nonlinear and field dependent material models
• Automatic time steps
• Link, line, plane, axisymmetric and solid field elements

Heat of Hydration Analysis

• Models the heat of hydration of concrete for a variety of cement types. 
• Includes effects due to the addition of fly ash and ground granulated blast furnace slag

IMD Plus Analysis

• Multiple event assessment
• Linear dynamics effects

Rail Track Analysis

• Track/bridge interaction analysis to Union of Railways code UIC774-3
• Automatic building of models
• Calculates stresses and forces in track from thermal and train loading

Vehicle Load Optimisation (Autoloader)

• Rapidly reduces load assessment times
• Extends vehicle loading capabilities of LUSAS Bridge
• Simplifies worst load case evaluation

Fast Multifrontal Solvers

• Fast Multifrontal Direct Solver
• Fast Multifrontal Block Lanczos Eigensolver

LUSAS Bridge plus product options

LUSAS Composite

• Composite engineering analysis software with advanced shell and solid composite elements for all types of composite engineering