Assessment of Bridge Expansion Joints Using Long-Term Displacement and Temperature Measurement
Publication: Journal of Performance of Constructed Facilities
Volume 21, Issue 2
Abstract
A procedure for assessment of bridge expansion joints making use of long-term monitoring data is presented in this paper. Based on the measurement data of expansion joint displacement and bridge temperature, the normal correlation pattern between the effective temperature and thermal movement is first established. Alarms will be raised if a future pattern deviates from this normal pattern. With the established correlation pattern, the expansion joint displacements under the design maximum and minimum temperatures are predicted and compared with the design allowable values for validation. The extreme temperatures for a certain return period are also derived using the measurement data for design verification. Then the annual or daily-average cumulative movements experienced by expansion joints are estimated from the monitoring data for comparison with the expected values in design. Because the service life and interval for replacement of expansion joints rely to a great extent on the cumulative displacements, an accurate prediction of the cumulative displacements will provide a robust basis for determining a reasonable interval for inspection or replacement of expansion joints. The proposed procedure is applied to the assessment of expansion joints in the cable-stayed Ting Kau Bridge with the use of one-year monitoring data.
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Acknowledgments
The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU 5241/05E). The writers also wish to thank the Hong Kong SAR Government Highways Department for providing support for this research.
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Information
Published In
Journal of Performance of Constructed Facilities
Volume 21 • Issue 2 • April 2007
Pages: 143 - 151
Copyright
© 2007 American Society of Civil Engineers.
History
Received: Oct 31, 2005
Accepted: Jan 26, 2006
Published online: Apr 1, 2007
Published in print: Apr 2007
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