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Journal of Sensors
Volume 2016, Article ID 9393281, 10 pages
http://dx.doi.org/10.1155/2016/9393281
Research Article

A Comparative Field Monitoring of Column Shortenings in Tall Buildings Using Wireless and Wired Sensor Network Systems

1School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea
2Architectural Engineering Research Team, Daewoo E&C, Suwon 440-210, Republic of Korea

Received 11 June 2015; Revised 18 September 2015; Accepted 20 September 2015

Academic Editor: Christos Riziotis

Copyright © 2016 Sungho Lee et al. 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.

Abstract

A comparative field measurement for column shortening of tall buildings is presented in this study, with a focus on the reliability and stability of a wireless sensor network. A wireless sensor network was used for monitoring the column shortenings of a 58-story building under construction. The wireless sensor network, which was composed of sensor and master nodes, employed the ultra-high-frequency band and CDMA communication methods. To evaluate the reliability and stability of the wireless sensor network system, the column shortenings were also measured using a conventional wired monitoring system. Two vibration wire gauges were installed in each of the selected 7 columns and 3 walls. Measurements for selected columns and walls were collected for 270 days after casting of the concrete. The results measured by the wireless sensor network were compared with the results of the conventional method. The strains and column shortenings measured using both methods showed good agreement for all members. It was verified that the column shortenings of tall buildings could be monitored using the wireless sensor network system with its reliability and stability.