Civil and Structural engineering

Software Specification

LUSAS Civil & Structural

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

Analysis capabilities

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

Includes this software option for new orders:

  • Fast solvers

And when used with these purchased software options also allows:

  • Steel frame design
  • RC frame design
  • Advanced Interactive Modal Dynamics (IMD Plus)

See below for more details.


  • Point and line geometry creation
  • Line mesh creation
  • Structural supports including free, fixed and spring
  • Structural loadings
  • Standard steel section libraries for selected countries
  • User-defined engineering beam properties
  • Standard section property calculator
  • Vehicle loading for selected countries
  • Moving vehicle load facility
  • Prestress / Post-tensioning capability
  • Basic and Smart load combinations
  • Contour, diagram, value, vector, deformed mesh results
  • Graph wizard with auto-updating of graphs
  • Animation wizard
  • One-click report facility
  • Report generation with auto-updating of reports

And in addition:

  • 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 geometry 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
  • 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 joints/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
  • Specialised material models including:
  • CEB-FIP Model code 1990
  • Codifed creep and shrinkage
  • User-defined models
  • and others
  • Civil & Structural specific features
  • Precast sections of country-specific concrete beams
  • Box section generator
  • Linear cable tuning facility
  • Prestress / Post-tensioning facility
  • RC slab / wall design facility to indicate flexural reinforcement requirements
  • Calculation of crack widths to EN1992-1
  • Construction table facility

LUSAS Civil & Structural software options

Included for new orders:

Fast Solvers

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

Available for purchase to increase the analysis and design capabilities of LUSAS Civil & Structural:

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

IMDplus Analysis

  • Multiple event assessment
  • Linear dynamics effects

LUSAS Civil & Structural upgrade options

LUSAS Civil & Structural plus specification

Find out more

Contact us for a quotation


Software Information

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LUSAS is a trademark and trading name of Finite Element Analysis Ltd. Copyright 1982 - 2022. Last modified: March 03, 2021 . Privacy policy. 
Any modelling, design and analysis capabilities described are dependent upon the LUSAS software product, version and option in use.