ASSESSMENT OF MASONRY ARCH BRIDGES. EXPERIENCES FROM RECENT CASE STUDIES

A methodology for the assessment of masonry arch bridges using reliability-based techniques is presented. Two different models are used in the carrying capacity analysis: (1) the arches behave linear-elastic and failure is reached when only one single section of the bridge reaches the Ultimate Limit State; and (2) a theoretical model that takes into account the non-linear behaviour of the arches in the stage close to failure, as well as the system and redundancy behaviour of the structure. In this case, the failure is due to either a material collapse or a mechanism with 4 hinges in the arch. The safety is obtained in terms of the probability of failure (reliability index). The safety level is evaluated both for the actual existing traffic which data is available from the traffic surveys, as well as for the special permits as outlined in Eurocode 1-Part 3 (CEN. 1995). The method is applied to 6 arch bridges with different longitudinal configurations, span-lengths and materials. The results show how the actual carrying capacity of arch bridges is large enough to safely support the actual and future traffic and the expected overload permits as well. Other conclusions are related to the most suitable theoretical models of failure analysis of multi-span arch bridges. For the covering abstract see IRRD E104152.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Publication Date: 1999

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00788394
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2841-5
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM