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Large-scale surface strain gauge for health monitoring of civil structures
Civil, Construction and Environmental Engineering Conference Presentations and Proceedings
  • Simon Laflamme, Iowa State University
  • Matthais Kollosche, Universität Potsdam
  • Guggi Kofod, Universität Potsdam
  • Venkata Dharmateja Kollipara, Iowa State University
  • Husaam S. Saleem, Iowa State University
Document Type
Conference Proceeding
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security
Publication Date
(32.7153292, -117.15725509999999)
Health monitoring of civil structures is a process that aims at diagnosing and localizing structural damages. It is typically conducted by visual inspections, therefore relying vastly on the monitoring frequency and individual judgement of the inspectors. The automation of the monitoring process would be greatly beneficial by increasing life expectancy of civil structures via timely maintenance, thus improving their sustainability. In this paper, we present a sensing method for automatically localizing strain over large surfaces. The sensor consists of several soft capacitors arranged in a matrix form, which can be applied over large areas. Local strains are converted into changes in capacitance among a soft capacitors matrix, permitting damage localization. The proposed sensing method has the fundamental advantage of being inexpensive to apply over large-scale surfaces. which allows local monitoring over large regions, analogous to a biological skin. In addition, its installation is simple, necessitating only limited surface preparation and deployable utilizing off-the-shelf epoxy. Here, we demonstrate the performance of the sensor at measuring static and dynamic strain, and discuss preliminary results from an application on a bridge located in Ames, IA. Results show that the proposed sensor is a promising health monitoring method for diagnosing and localizing strain on a large-scale surface.

Copyright 2014 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

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Citation Information
Simon Laflamme, Matthais Kollosche, Guggi Kofod, Venkata Dharmateja Kollipara, et al.. "Large-scale surface strain gauge for health monitoring of civil structures" San Diego, CA(2014)
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