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Sensors 2013, 13(12), 17346-17361; doi:10.3390/s131217346
Article

A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges

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Received: 4 October 2013; in revised form: 9 December 2013 / Accepted: 10 December 2013 / Published: 16 December 2013
(This article belongs to the Section Sensor Networks)
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Abstract: Sensor technologies have been actively employed in structural health monitoring (SHM) to evaluate structural safety. To provide stable and real-time monitoring, a practical wireless sensor network system (WSNS) based on vibrating wire strain gauges (VWSGs) is proposed and applied to a building under construction. In this WSNS, the data measured from each VWSG are transmitted to the sensor node via a signal line and then transmitted to the master node through a short-range wireless communication module (operating on the Industrial, Scientific, and Medical (ISM) band). The master node also employs a long-range wireless communication module (Code Division Multiple Access—CDMA) to transmit the received data from the sensor node to a server located in a remote area, which enables a manager to examine the measured data in real time without any time or location restrictions. In this study, a total of 48 VWSGs, 14 sensor nodes, and seven master nodes were implemented to measure long-term strain variations of mega-trusses in an irregular large-scale building under construction. Based on strain data collected over a 16-month period, a quantitative evaluation of the construction process was performed to determine the aspects that exhibit the greatest influence on member behavior and to conduct a comparison with numerical simulation results. The effect of temperature stress on the structural elements was also analyzed. From these observations, the feasibility of a long-term WSNS based on VWSGs to evaluate the structural safety of an irregular building under construction was confirmed.
Keywords: vibrating wire strain gauge; structural health monitoring; wireless network; mega-truss; temperature stress; long-term monitoring; irregular building vibrating wire strain gauge; structural health monitoring; wireless network; mega-truss; temperature stress; long-term monitoring; irregular building
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Park, H.S.; Lee, H.Y.; Choi, S.W.; Kim, Y. A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges. Sensors 2013, 13, 17346-17361.

AMA Style

Park HS, Lee HY, Choi SW, Kim Y. A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges. Sensors. 2013; 13(12):17346-17361.

Chicago/Turabian Style

Park, Hyo S.; Lee, Hwan Y.; Choi, Se W.; Kim, Yousok. 2013. "A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges." Sensors 13, no. 12: 17346-17361.


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