Headway modelling for traffic load assessment of short to medium span bridges

Author: O'Brien, Eugene J;Caprani, Colin C

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Headway modelling for traffic load assessment of short to medium span bridges

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Author
O'Brien, Eugene J;Caprani, Colin C
Date published
N/A
Price

Standard: £10 + VAT
Members/Subscribers: Free

The Structural Engineer
Author

O'Brien, Eugene J;Caprani, Colin C

Citation

The Structural Engineer, Volume 83, Issue 16, 2005

Date published

N/A

Author

O'Brien, Eugene J;Caprani, Colin C

Citation

The Structural Engineer, Volume 83, Issue 16, 2005

Price

Standard: £10 + VAT
Members/Subscribers: Free

Site-specific assessment of the loading to which existing bridges are subject has considerable potential for saving on rehabilitation and replacement costs of the bridge stock. Monte Carlo simulations, with traffic measurements from site, are used to estimate the characteristic values for load effects. In this paper, it is shown that the critical loading events from which the characteristic effects are derived, are strongly dependent on the assumptions used for the headways of successive trucks. A new approach which uses measured headway statistical distributions is developed and is shown to be a reasonable balance between conservative assumptions and less realistic scenarios. The sensitivity of characteristic load effects to conventional headway assumptions is shown to be significant.

Eugene J. Obrien, BE, MEngSc. PhD, CEng, FIEI, MIStructE
Department of Civil Engineering, University College Dublin, Ireland

Colin C. Caprani, BSc(Eng), DipEng, MIEI, MIABSE
Department of Civil Engineering, University College Dublin, Ireland

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Format:
PDF
Publisher:
The Institution of Structural Engineers

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