The Department of Transport (DoT) in the UK has conducted experimental work and preliminary structural analysis of flat arches, which suggested several advantages for them. It then commissioned Robert Benaim & Associates to participate in a series of studies of the potential of flat arch bridges. Benaim's work had two stages: (1) verifying the preliminary DoT studies by analysing a 4m span 400mm deep slab; and (2) the preliminary design of two arch bridges with clear spans of 10m and 20m, both with a span-to-rise ratio of 10. These bridge designs were then costed and compared with more conventional bridge designs. In both stages, a two-dimensional finite element model was developed for the analysis, using the ENFELA program. Stage (1) investigated the effects of: (1) support stiffness; (2) support movement; (3) longitudinal reinforcement for a reinforced concrete arch; and (4) modulus of elasticity of arch material. Three failure criteria were considered. In Stage (2), a reinforced concrete solid slab monolithic design with reinforced concrete abutments was chosen for the 10m span, and the 20m span comprised precast beams, in-situ top slab deck, and reinforced concrete abutments. Five recommendations for further research are made.


  • English

Media Info

  • Features: References;
  • Pagination: p. 387-96

Subject/Index Terms

Filing Info

  • Accession Number: 00719990
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2048-1
  • Files: ITRD
  • Created Date: Apr 26 1996 12:00AM