Application of fiber optical and resistance strain gauges for long-term surveillance of civil engineering structures

Philipp M. Nellen; Peter Anderegg; Rolf Broennimann; Urs J. Sennhauser

doi:10.1117/12.274633

23 May 1997 Application of fiber optical and resistance strain gauges for long-term surveillance of civil engineering structures

Philipp M. Nellen, Peter Anderegg, Rolf Broennimann, Urs J. Sennhauser

Author Affiliations +

Proceedings Volume 3043, Smart Structures and Materials 1997: Smart Systems for Bridges, Structures, and Highways; (1997) https://doi.org/10.1117/12.274633
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

We report on applications of surveillance and test systems for civil engineering structures. The system key elements are optical-fiber Bragg grating sensors and conventional resistance strain gauges. A recently built stay cable bridge with a world novelty of two carbon-fiber-reinforced-polymer cables was equipped with both types of sensors. The sensor system on the bridge is now operational for ten months and the bridge is open for traffic for 4 months. Results of the bridge surveillance are presented. To monitor a large concrete structure, the electrical power dam of Luzzone in the Swiss Alps, a prototype sensor rod was designed. First measurements with a sensor rod embedded in a concrete test prism are discussed. Several redundant measurements are made to compensate for temperature drift and to monitor the reliability of the measurement chain.

Citation Download Citation

Philipp M. Nellen, Peter Anderegg, Rolf Broennimann, and Urs J. Sennhauser "Application of fiber optical and resistance strain gauges for long-term surveillance of civil engineering structures", Proc. SPIE 3043, Smart Structures and Materials 1997: Smart Systems for Bridges, Structures, and Highways, (23 May 1997); https://doi.org/10.1117/12.274633

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