Preliminary study to facilitate smart structure systems in bridge girders

Thomas C. Kirkpatrick; Danford O. Peterson; Peter J. Rossi; Laura R. Ray; Richard A. Livingston

doi:10.1117/12.348665

18 May 1999 Preliminary study to facilitate smart structure systems in bridge girders

Thomas C. Kirkpatrick, Danford O. Peterson, Peter J. Rossi, Laura R. Ray, Richard A. Livingston

Proceedings Volume 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways; (1999) https://doi.org/10.1117/12.348665
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

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.

Citation Download Citation

Thomas C. Kirkpatrick, Danford O. Peterson, Peter J. Rossi, Laura R. Ray, and Richard A. Livingston "Preliminary study to facilitate smart structure systems in bridge girders", Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); https://doi.org/10.1117/12.348665

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