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Integral bridges

Integral bridges

A fundamental approach to the time-temperature loading problem

George L. England, David I. Bush, Neil C.M. Tsang

152 pages, parution le 01/12/2000

Résumé

Integral bridges have become increasingly popular in the UK over recent years. Problems and costs associated with failed expansion joints in conventional bridges not only make integral bridges a cost-effective option but also means they have longer lifespans that their counterparts. The Highways Agency standards now require that, wherever possible, ail new bridges of less than 60 m length should be of integral form.

The growing importance of integral bridges has highlighted the need for more information and guidance to assist in improving bridge design. This book presents the results of research commissioned by the Highways Agency into the thermally induced soil/structure interaction created by environmental temperature changes and the associated cyclical displacements imposed on the granular backfill of bridge abutments. lt:

  • develops a better theoretical understanding of temperature-induced cyclic displacements; in particular the strain ratcheting in backfill soil in contact with a 'stiff 'structure
  • identifies the governing soil parameters and examines their influence
  • develops numerical modelling procedures to predict soil behaviour
  • identifies and quantifies the controlling features of bridge structures relevant to the interaction problem
This book provides essential information for bridge designers to aid their understanding of the cyclical changes in backfill pressures and settlement due to diurnal and annual changes in bridge deck temperature - a crucial factor when designing integral bridges.

Contents

  • Foreword
  • Preface
  • Acknowledgements
  • Executive summary
  • Notation
Part 1 - The integral bridge
  • Introduction
  • Bridge form and temperature
  • Granular flow behind abutment
  • Model retaining wall test results
  • Numerical simulations
  • Settlement of abutment foundation
  • Conclusions and recommendations
  • Appendix 1.1 - Validation of the retaining wall analysis
  • Appendix 1.2 - Additional results from model retaining wall tests
Part 2 - Granular soil
  • Cyclic behaviour of granular material
  • Numerical soil model
  • Validation of the soil model in plane strain
  • Retaining wall analysis program
  • Test equipment
  • Appendix 2.1 Explanation of strain ratcheting
  • Appendix 2.2 Numerical soil model: detailed logic
  • References
  • Index

Caractéristiques techniques

  PAPIER
Éditeur(s) Thomas Telford
Auteur(s) George L. England, David I. Bush, Neil C.M. Tsang
Parution 01/12/2000
Nb. de pages 152
Format 21 x 30
Couverture Relié
Poids 783g
Intérieur Noir et Blanc
EAN13 9780727728456

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