Damage detection on a full-scale highway sign structure with a distributed wireless sensor network
Zhuoxiong Sun,Sriram Krishnan,Greg Hackmann,Guirong Yan,Shirley J. Dyke,Chenyang Lu,Ayhan Irfanoglu
Abstract
Wireless sensor networks (WSNs) have emerged as a novel solution to many of the challenges of structural health monitoring (SHM) in civil engineering structures. While research projects using WSNs are ongoing worldwide, implementations of WSNs on full-scale structures are limited. In this study, a WSN is deployed on a full-scale 17.3m-long, 11-bay highway sign support structure to investigate the ability to use vibration response data to detect damage induced in the structure. A multi-level damage detection strategy is employed for this structure: the Angle-between-String-and-Horizon (ASH) flexibility-based algorithm as the Level I and the Axial Strain (AS) flexibility-based algorithm as the Level II. For the proposed multi-level damage detection strategy, a coarse resolution Level I damage detection will be conducted first to detect the damaged region(s). Subsequently, a fine resolution Level II damage detection will be conducted in the damaged region(s) to locate the damaged element(s). Several damage cases are created on the full-scale highway sign support structure to validate the multi-level detection strategy. The multi-level damage detection strategy is shown to be successful in detecting damage in the structure in these cases.
Key Words
multi-level damage detection; full scale structure; wireless sensor network
Address
Zhuoxiong Sun and Sriram Krishnan — School of Mechanical Engineering, Purdue University, USA
Greg Hackmann and Chenyang Lu — Department of Computer Science and Engineering, Washington University in St. Louis, USA
Guirong Yan — Department of Civil Engineering, University of Texas at El Paso, USA
Shirley J. Dyke — School of Mechanical Engineering, Purdue University, USA; School of Civil Engineering, Purdue University, USA
Ayhan Irfanoglu — School of Civil Engineering, Purdue University, USA
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