3D laser scanning for masonry arch bridges

Masonry arch bridges have proven to be durable and reliable structures for centuries. Many masonry arch bridges carry much higher traffic loads than they were originally intended to carry. Over many decades, the main agent for deterioration in masonry arch bridges is a combination of poor drainage behind the abutments and over the arches. If the water is not intercepted and carried away from the bridge, it finds its own route through the structure, usually the mortar joints. The damaging agent of structural deterioration is that as the cementitious materials in the mortar get leached out, and the mortar gaps begin to close up. Inevitably, mortar loss is not uniformly spread through the arch, and gaps close up in a nonuniform way. With increased axle loads and little cover over the arch, the arch can deform asymmetrically under the repeated live loading. Change in shape of a masonry arch is serious as the resistance to the applied loads (line of thrust in the arch) also changes. (a) For the covering entry of this conference, please see IRRD abstract no. E218160.

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  • Accession Number: 01143976
  • Record Type: Publication
  • Source Agency: TRL
  • Files: ITRD, ATRI
  • Created Date: Nov 16 2009 12:17PM