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Proceedings Paper

Structural health monitoring system of a cable-stayed bridge using a dense array of scalable smart sensor network
Author(s): Soojin Cho; Shin Ae Jang; Hongki Jo; Kirill Mechitov; Jennifer A. Rice; Hyung-Jo Jung; Chung-Bang Yun; Billie F. Spencer; Tomonori Nagayama; Juwon Seo
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Paper Abstract

This paper presents a structural health monitoring (SHM) system using a dense array of scalable smart wireless sensor network on a cable-stayed bridge (Jindo Bridge) in Korea. The hardware and software for the SHM system and its components are developed for low-cost, efficient, and autonomous monitoring of the bridge. 70 sensors and two base station computers have been deployed to monitor the bridge using an autonomous SHM application with consideration of harsh outdoor surroundings. The performance of the system has been evaluated in terms of hardware durability, software reliability, and power consumption. 3-D modal properties were extracted from the measured 3-axis vibration data using output-only modal identification methods. Tension forces of 4 different lengths of stay-cables were derived from the ambient vibration data on the cables. For the integrity assessment of the structure, multi-scale subspace system identification method is now under development using a neural network technique based on the local mode shapes and the cable tensions.

Paper Details

Date Published: 1 April 2010
PDF: 12 pages
Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764707 (1 April 2010); doi: 10.1117/12.852272
Show Author Affiliations
Soojin Cho, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Shin Ae Jang, Univ. of Illinois at Urbana-Champaign (United States)
Hongki Jo, Univ. of Illinois at Urbana-Champaign (United States)
Kirill Mechitov, Univ. of Illinois at Urbana-Champaign (United States)
Jennifer A. Rice, Texas Tech Univ. (United States)
Hyung-Jo Jung, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Chung-Bang Yun, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Billie F. Spencer, Univ. of Illinois at Urbana-Champaign (United States)
Tomonori Nagayama, The Univ. of Tokyo (Japan)
Juwon Seo, Hyundai Instruction of Construction Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7647:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010
Masayoshi Tomizuka, Editor(s)

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