Infrastructure analysis and design software

Software Option for LUSAS Bridge

Vehicle Load Optimisation

The LUSAS Vehicle Load Optimisation (VLO) software option extends the static and moving vehicle loading capabilities of LUSAS Bridge. It identifies critical highway vehicle and train (rail) loading patterns on bridges and applies these loading patterns to LUSAS models. It greatly simplifies the evaluation of worst load position, reduces the amount of time spent generating models, and leads to more efficient and economic design, assessment or load rating of bridge structures.

The LUSAS Vehicle Load Optimisation software option is included in all LUSAS Bridge products for all new sales from Version 18 onwards. Contact sales@lusas.com for more details.

How does VLO work for highway vehicles?

1. One or more positions on the LUSAS model that are to be used for loading evaluation are selected and assigned influence attributes. Kerb lines representing the extent of the carriageway are defined.

2. An influence surface for each position is automatically calculated (using a Direct or a Reciprocal Method) and can be optionally displayed.

3. 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.

4. 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.

Highway design codes currently supported

  • Australia: AS5100-2: 2004, AS5100-7: 2004 (Austroads)

  • Canada CAN/CSA-S6-06 (Design)

  • China: JTG D62-2015

  • Denmark: DS/EN 1991:2 DK NA:2015

  • Europe: EN1991-2 Recommended values

  • Finland: LO 24/2014

  • India - IRC:6-2017

  • Ireland: EN1991-2

  • Italy: EN1991-2

  • New Zealand (Transit New Zealand Bridge Manual)

  • Norway: NS EN1991-2.2004 NA 2010 + NA-rundsskiv 07-2015

  • Poland: EN1991-2

  • Saudi Arabia: MOMRA Bridges Design Specifications

  • Sweden: EN1991-2 (2009), EN1991-2 (2011), TDOK 2013:0267 Version 3.0

  • South Africa: TMH7

  • United Kingdom: EN1991-2, BA34/90, BD21/01 including Annexes D and E, BD37/01 (Road+Rail), BD86/11, BS5400 Rail Railtrack document RT/CE/025, and CS 454 Assessment of Highway Structures and Bridges.

  • United States of America: AASHTO LRFD (7th and 6th Edition) and AASHTO Standard Specifications (17th Edition)

 


How does VLO work for train (rail) loading?

1. One or more positions on the LUSAS model that are to be used for loading evaluation are selected and assigned influence attributes. Tracks and loadable track layouts must be defined.

2. An influence surface for each position is automatically calculated and can be optionally displayed.

3. The vehicle load optimisation facility interrogates each set of influence lines, and calculates the critical loading pattern for each. Critical loading patterns can be optionally displayed prior to calculating loading effects.

4. The critical loading patterns are then used to calculate the loading effects on the model.

Train (rail) design codes currently supported

  • Eurocode EN1991-2 (Recommended values) (p491ae) and National Annexes for Denmark, Finland, Ireland, Italy, Norway, Poland and the United Kingdom

  • International UIC Leaflet 776-1 (5th Edition)

  • United Kingdom NR-GN-CIV-025

  • United States of America AREMA manual for Railway Engineering (Concrete and Steel Structures)

 


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, 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 / tracks

  • 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 with display and optional sorting of results for all visible nodes


"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.


Find out more 

Contact us for a quotation

 

Software Information


innovative | flexible | trusted

LUSAS is a trademark and trading name of Finite Element Analysis Ltd. Copyright 1982 - 2019. Privacy policy. 
Any modelling and analysis capabilities described on this page are dependent upon the LUSAS software product and version in use. Last modified: May 22, 2020.