Overview of assessing the load carrying capacity of timber bridges using dynamic methods

A key element of an effective asset management system for bridges is the ability to undertake cost effective load assessment and evaluation of the current state of bridges and to be able to understand the causes and quantify the rate of their deterioration. This paper describes procedures that have been specifically developed to address the need for relatively inexpensive load assessment, costing less than 25 per cent of the expenditure required for static load tests, (and no more than 1 per cent-5 per cent of the replacement cost of the asset) that will provide reliable, quantitative information on the performance of short and medium span bridges. These procedures contain two significant innovations - the first is accurate determination of the global deck stiffness of a timber deck using dynamic frequency analysis; the second is prediction of load capacity of a bridge deck, using a probabilistic relationship between bending strength and gross stiffness (EI) of timber girders. (a) For the covering entry of this conference, please see ITRD abstract no. E211602.


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  • Accession Number: 01011237
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0855886986
  • Files: ITRD, ATRI
  • Created Date: Dec 19 2005 2:55PM