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Proceedings Paper

Preliminary study to facilitate smart structure systems in bridge girders
Author(s): Thomas C. Kirkpatrick; Danford O. Peterson; Peter J. Rossi; Laura R. Ray; Richard A. Livingston
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Paper Abstract

Sensors are currently available and used to monitor structural performance and loads incurred by bridges already in service. However, there has been limited research concerning the stresses that steel bridge girders endure during transport from the manufacturer to the job site and during the installation process. This paper reports the measured stresses on steel bridge girders during transportation from Lancaster, PA to Hanover, NH and during construction of the Ledyard Bridge on the New Hampshire - Vermont border. Two different monitoring system were developed for this data acquisition in a mobile environment. The first, a fiber optic strain monitoring system, utilizing Bragg grating technology. The second utilized an electrical- resistive foil strain gage network, in conjunction with wireless telemetry equipment. Together, these two systems formed a smart structure system for monitoring bridge girders while confirming the accuracy of data gathered through redundancy. Result conclusively demonstrated for the first time, that stresses in beams during transportation are significant and approach the factor of safety margin in girder design.

Paper Details

Date Published: 18 May 1999
PDF: 9 pages
Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); doi: 10.1117/12.348665
Show Author Affiliations
Thomas C. Kirkpatrick, Dartmouth College (United States)
Danford O. Peterson, Dartmouth College (United States)
Peter J. Rossi, Dartmouth College (United States)
Laura R. Ray, Dartmouth College (United States)
Richard A. Livingston, Federal Highway Administration (United States)

Published in SPIE Proceedings Vol. 3671:
Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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