Towards practical modeling of integral-abutment bridges under longitudinal load

Bridges with integral or semi-integral abutments are increasingly favoured both in New Zealand and internationally. However analysis of bridge structures which incorporate such abutment structures is more demanding, particularly under longitudinal load. Longitudinal loads for which such bridges must cater include monotonic retention loads, daily and seasonal temperature cycles, episodic effects such as braking and traction, and more extreme situations such as earthquake-induced vibration, liquefaction and lateral spread. The Bridge Manual administered by the New Zealand Transport Agency permits the use of relatively long bridges with integral or semi-integral abutments only where their design is supported by rational analysis. Other national bridge prescriptions also limit the length of bridges with integral or semi-integral abutments. An approach to the analysis of such bridges under longitudinal load is proposed. This approach seeks to draw on information from a number of sources, and to combine this information in a manner which is practical; which gives confidence in the predicted structural demands; and which satisfies the requirements of documents such as New Zealand's Bridge Manual. (a) For the covering entry of this conference, please see IRRD abstract no. E218160.


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  • Accession Number: 01143982
  • Record Type: Publication
  • Source Agency: TRL
  • Files: ITRD, ATRI
  • Created Date: Nov 16 2009 12:18PM