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Proceedings Paper

Monitoring system for bolt joints on steel structures
Author(s): Ki-Tae Park; Young-Joon Yu; Hyunsup Shin; Jin-Hyung Lee; Woo-Sang Lee
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Paper Abstract

The bolt joints on steel structures are exposed to the possibility of damage, and thus, require intensive care. Usually, periodic inspections are conducted at the cost of time and money. However, it is very difficult to check so many bolts carefully. The purpose of this study is to propose a system that can more efficiently monitor the tightness/looseness of these bolts. The proposed bolt fastening monitoring system is comprised of sensors that are attached to nuts and a data receiving terminal, which gathers information. The reed switch consists of two thin, metallic contacts enveloped in a glass tube and is an electrical switching sensor that is triggered ON or OFF by changes in the surrounding magnetic field. The verification tests showed that bolt loosening can be effectively detected, proving the applicability of this system to the maintenance of the bolt joints of steel structures. The newly developed sensor system is expected to solve conventional sensor problems by enabling measurement of structural members which was not previously possible, thus providing a basis for a new technology in the construction industry by applying IT to construction technology.

Paper Details

Date Published: 14 April 2011
PDF: 8 pages
Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 798120 (14 April 2011); doi: 10.1117/12.880301
Show Author Affiliations
Ki-Tae Park, Korea Institute of Construction Technology (Korea, Republic of)
Young-Joon Yu, Korea Institute of Construction Technology (Korea, Republic of)
Hyunsup Shin, Korea Institute of Construction Technology (Korea, Republic of)
Jin-Hyung Lee, Korea Institute of Construction Technology (Korea, Republic of)
Woo-Sang Lee, Smart Control & Sensing, Korea Research Institute of Standards and Science (Korea, Republic of)


Published in SPIE Proceedings Vol. 7981:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
Masayoshi Tomizuka, Editor(s)

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