ASSESSMENT OF SPANDREL WALLS

British Rail Research's current work on the assessment of spandrel walls is described, and the assessment method now being developed is outlined. British Rail's methodology has been derived from the study of: (1) past failures; (2) available test data; and (3) analyses of spandrel walls. The predominant failure modes reported are tilting and sliding, but bulging was often reported as a precursor to tilting. Failure causes are rarely studied scientifically, because the main emphasis is on restoring the failed bridge as soon as possible. Several lessons have been learned by examining the data about past bridge tests. A new test site was set up to test spandrels on structures in service and long-term effects due to frost and weathering. The site has gauges to monitor soil moisture content, temperature, and backfill pressure, and is conducting a long-term study of a test bridge. A method of analysing a given spandrel has been developed, that is simple to use and reflects the quality of the available data. An assessment methodology for masonry arch spandrel walls requires information about: (1) disturbing forces; (2) resistance capacity; and (3) features of the structure that could vary with time. Seven conclusions are drawn from the work so far.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 469-77

Subject/Index Terms

Filing Info

  • Accession Number: 00719996
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2048-1
  • Files: ITRD
  • Created Date: Apr 26 1996 12:00AM