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Software Option for Standard and Plus versions

Vehicle Load Optimisation

Vehicle Load Optimisation software complements and extends the in-built static and moving vehicle loading capabilities of LUSAS Bridge and helps to significantly simplify the evaluation of worst load position for various load configurations.

Vehicle load optimisation is used to identify critical vehicle loading patterns on bridges and apply these loading patterns to LUSAS analysis models. It reduces the amount of time spent generating models and leads to more efficient and economic design, assessment or load rating of bridge structures.

How does it work?

  1. One or more positions on the LUSAS model that are to be used for loading evaluation are selected and assigned influence attributes. 
  2. Kerb lines representing the extent of the carriageway are defined.
  3. An influence surface for each position is automatically calculated and can be optionally displayed.
  4. The vehicle load optimisation facility interrogates each influence surface and calculates the critical loading pattern. The critical loading pattern can be optionally displayed prior to calculating loading effects.
  5. The critical loading patterns are then used to calculate the loading effects on the model. Critical loading patterns can be optionally superimposed on deformed or undeformed results plots.

By using LUSAS Bridge with Vehicle Load Optimisation software the guesswork is taken out of bridge loading and a much faster evaluation of worst-case loading patterns is obtained.

Country design codes supported:

Design codes for numerous countries are supported. These currently include:

  • Australia: AUSTROADS standard, AS5100-2: 2004
  • Canada CAN/CSA-S6-06 (Design)
  • China: JTG D62-2004
  • Europe: EN1991-2 recommended values
  • Ireland: EN1991-2
  • Italy: EN1991-2
  • Finland 
  • India 
  • Israel
  • Korea 
  • New Zealand (Transit New Zealand Bridge Manual)
  • Norway
  • Poland: EN1991-2
  • Sweden: EN1991-2, BRO
  • South Africa: TMH7
  • United Kingdom: EN1991-2, BD21/97, BD21/01, BD37/88, BD37/01 (Road+Rail), BS5400 Rail Railtrack document RT/CE/025
  • United States of America: AASHTO LFD, LRFD (7th and 6th Edition)

In Summary:

  • Automatic generation of influence lines / surfaces in LUSAS Bridge
  • Solves several points on a structure in one analysis session
  • For use with LUSAS beams (LUSAS TLO option only), plates, shells and grillages
  • Precise identification of critical loading patterns to the appropriate international code of practice
  • Graphical visualisation of vehicle loading patterns
  • Generates loadings for straight or curved carriageways
  • Facility to accommodate changes in design codes
  • Pre-defined standard vehicles
  • User customisation of vehicle loads
  • Option to use non-default values
  • Option to create user-defined rules
  • Fast solution times with loading files being produced far quicker than can be done manually
  • Facility with some supported codes for sensitivity testing - for example determining the maximum number of HB units which a structure may support, with or without HA loading
  • Onerous results table facility (LUSAS TLO only) can optionally show sorted results for all chosen influences at nodes that are
    visible.

"Using the LUSAS Vehicle Load Optimization facility expedited the live load analyses for a highly repetitive task that would have otherwise been extremely time consuming."

Dr Ihab Darwish, Alfred Benesch and Company.


 

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Software Information


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Any modelling and analysis capabilities described on this page are dependent upon the LUSAS software product and version in use.