Condition assessment of a reinforced concrete jetty structure, its load capacity and suggested rehabilitation strategy

A reinforced concrete jetty structure built in 1970 has developed severe deterioration due to chloride-induced corrosion of the steel reinforcement bars in the piles and cross-heads. The piles have shown severe vertical cracking and the crossheads severe horizontal cracking and delamination of the cover concrete at the soffit. After a thorough visual inspection, concrete cores were extracted from representative elements and tested for strength, density, and chloride penetration. Electrochemical properties of steel, including half-cell potential and corrosion rate were determined, and concrete cover thickness measured on site to map the corrosion status of the various elements. The load capacity of the jetty was analysed based on the original design and taking into account the observed deterioration of the concrete and the corrosion of the steel reinforcing bars, and the trend of decay in the load capacity determined. In spite of severe deterioration of crossheads, the load bearing capacity remains adequate for the current load rating of 7 tonnes and 10 tonnes for single axle and double axle, respectively. (a) For the covering entry of this conference, please see ITRD abstract no. E211602.

Language

  • English

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Filing Info

  • Accession Number: 01011327
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0855886986
  • Files: ITRD, ATRI
  • Created Date: Dec 19 2005 3:02PM