Engineering analysis and design software
Bridge design and engineering

Case Study

Collapse Analysis of Bridge Bearings

Hyder Consulting used the LUSAS consultancy services department to analyse the collapse of fabricated steel ‘trestle’ bridge bearings, for the M5 road bridge at Avonmouth, UK. The objective of the project was to predict the ultimate strength of a variety of bearing structures, both with and without strengthening modifications. The final LUSAS model included geometric, material and contact nonlinear effects.

A number of initial models were created and used to assess the performance of both shell and solid element idealisations. LUSAS were fortunate to have been provided with experimental data (load-strain measurements) with which to validate the results. This allowed the effects of each type of nonlinearity to be assessed until good results were obtained for only modest CPU time during analysis. The validated model was then used as the basis for assessment of other similar structures.

LUSAS were pleased to discover very close agreement between measured and calculated values of ultimate load. The LUSAS analysis also clearly showed that the failure mode was plastic collapse; elastic buckling occurred at a much higher load.

The results of this work were used by Hyder Consulting to help determine which bearings require strengthening for the additional bridge capacity predicted for the future.

 

Software Information

  Bridge / Bridge plus
green_arrow.gif (94 bytes) Software overview
green_arrow.gif (94 bytes) Modelling in general
green_arrow.gif (94 bytes) Advanced elements, materials and solvers
green_arrow.gif (94 bytes) Load types and combinations
green_arrow.gif (94 bytes) Staged construction modelling
green_arrow.gif (94 bytes) Geotechnical / Soil-structure modelling
green_arrow.gif (94 bytes) Analysis and design
green_arrow.gif (94 bytes) Design code facilities
green_arrow.gif (94 bytes) Viewing results
green_arrow.gif (94 bytes) Software customisation

  Bridge LT
green_arrow.gif (94 bytes) Software overview

  Videos
green_arrow.gif (94 bytes)

  Choosing Software
green_arrow.gif (94 bytes) Software products
green_arrow.gif (94 bytes) LUSAS Bridge LT
green_arrow.gif (94 bytes) LUSAS Bridge
green_arrow.gif (94 bytes) LUSAS Bridge Plus
green_arrow.gif (94 bytes) Software selection

  Software Options
green_arrow.gif (94 bytes) Click to see index
 
  Case Studies
green_arrow.gif (94 bytes)

  Additional Information
green_arrow.gif (94 bytes) Linear and nonlinear buckling analysis
green_arrow.gif (94 bytes) Curved girder analysis
green_arrow.gif (94 bytes) Integral or jointless bridges
green_arrow.gif (94 bytes) Post-tensioning
green_arrow.gif (94 bytes) Concrete modelling
green_arrow.gif (94 bytes) Interactive Modal Dynamics
green_arrow.gif (94 bytes) LUSAS Programmable Interface (LPI)

  General information
green_arrow.gif (94 bytes) Hardware specification
green_arrow.gif (94 bytes) Licencing and Networking options
green_arrow.gif (94 bytes) Software prices
green_arrow.gif (94 bytes) Documentation
green_arrow.gif (94 bytes) Links page
 

Request information

 


LUSAS is a trademark and trading name of Finite Element Analysis Ltd. 
Copyright 1982 - 2017 LUSAS. Last modified: March 02, 2017. Privacy policy

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