Smart Structures and Systems

테크노프레스 (Techno-Press)
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Rapid full-scale expansion joint monitoring using wireless hybrid sensor

  • Jang, Shinae (Department of Civil and Environmental Engineering, University of Connecticut) ;
  • Dahal, Sushil (Department of Civil and Environmental Engineering, University of Connecticut) ;
  • Li, Jingcheng (Department of Civil and Environmental Engineering, University of Connecticut)
  • 투고 : 2012.10.08
  • 심사 : 2013.04.18
  • 발행 : 2013.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Condition assessment and monitoring of bridges is critical for safe passenger travel, public transportation, and efficient freight. In monitoring, displacement measurement capability is important to keep track of performance of bridge, in part or as whole. One of the most important parts of a bridge is the expansion joint, which accommodates continuous cyclic thermal expansion of the whole bridge. Though expansion joint is critical for bridge performance, its inspection and monitoring has not been considered significantly because the monitoring requires long-term data using cost intensive equipment. Recently, a wireless smart sensor network (WSSN) has drawn significant attention for transportation infrastructure monitoring because of its merits in low cost, easy installation, and versatile on-board computation capability. In this paper, a rapid wireless displacement monitoring system, wireless hybrid sensor (WHS), has been developed to monitor displacement of expansion joints of bridges. The WHS has been calibrated for both static and dynamic displacement measurement in laboratory environment, and deployed on an in-service highway bridge to demonstrate rapid expansion joint monitoring. The test-bed is a continuous steel girder bridge, the Founders Bridge, in East Hartford, Connecticut. Using the WHS system, the static and dynamic displacement of the expansion joint has been measured. The short-term displacement trend in terms of temperature is calculated. With the WHS system, approximately 6% of the time has been spent for installation, and 94% of time for the measurement showing strong potential of the developed system for rapid displacement monitoring.

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참고문헌

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피인용 문헌

  1. Decentralized System Identification Using Stochastic Subspace Identification for Wireless Sensor Networks vol.15, pp.12, 2015, https://doi.org/10.3390/s150408131