Date of Award

5-2010

Degree Name

Master of Science in Engineering

Department

Civil and Construction Engineering

First Advisor

Dr. Xiaoytun Shao

Second Advisor

Dr. Osama Abuddayyeh

Third Advisor

Dr. Haluk Aktan

Access Setting

Masters Thesis-Campus Only

Abstract

The study presented herein evaluates three damage detection methods with a wireless sensor network based on accuracy and efficiency. The three methods assessed are: Modal Assurance Criterion (MAC); Damage Location Assurance Criterion (DLAC); and a method which utilizes the change of the structures flexibility. The concept of each method is discussed and demonstrated with a numerical example of a three story shear type structural model that was designed and constructed as the benchmark structure used in this study. The wireless sensor network adopted here utilizes the Intel Mote 2 preconfigured with the latest tool suite released by the Illinois Structural Health Monitoring Program (ISHMP). The establishment of the wireless sensing network, from software installation to data analysis, is presented. The three damage detection methods are then experimentally validated by using the wireless sensor network to monitor the benchmark structure model. Experimental results are presented and compared to demonstrate the performance of these three methods. The MAC method, with this simple benchmark structure, was determined to be the most accurate and efficient. The flexibility-based method was found to be the least accurate.

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