USE OF NON-CORRODIBLE REINFORCEMENT IN CONCRETE BRIDGES

Early in 1999, a cable-stayed footbridge was completed in the Danish town of Herning. It makes extensive use of non-corrodible materials for the cable stays and for reinforcement and post-tensioning tendons in the deck, and it will enable pedestrians and emergency vehicles to cross a railway yard. It is the latest of several trial bridges constructed by the Danish Road Directorate (DRD), to improve knowledge on durable bridge materials. It is cable-stayed with 16 carbon fibre reinforced polymer (CFRP) stay cables, has dual cable planes, and is 80m long. It was not fitted with traditional waterproofing membrane on the top of the bridge deck, and the deck surface was not protected by surfacing or epoxy coating. The deck will be directly exposed to chlorides from de-icing salts, so that it will be possible to monitor the behaviour of CFRP and stainless steel reinforcement under harsh environmental conditions. To evaluate the economic consequences of several technically feasible solutions, the DRD usually makes net present value (NPV) comparisons, based on the structure's life-cycle costs. The paper gives the formula used for NPV and presents a numerical example. For the trial project in Herning, it was found that it is not yet economically feasible to use CFRP as plain reinforcement for concrete structures. 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: 00788372
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2841-5
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM