University of Illinois Urbana-Champaign

Decentralized identification and multimetric monitoring of civil infrastructure using smart sensors

Sim, Sung-Han

Content Files
Sim_Sung Han.pdf

Permalink

https://hdl.handle.net/2142/24248

Description

Title
Decentralized identification and multimetric monitoring of civil infrastructure using smart sensors
Author(s)
Sim, Sung-Han
Issue Date
2011-05-25T15:04:35Z
Director of Research (if dissertation) or Advisor (if thesis)
Spencer, Billie F., Jr.
Doctoral Committee Chair(s)
Spencer, Billie F., Jr.
Committee Member(s)
  • Elnashai, Amr S.
  • Agha, Gul A.
  • Kuchma, Daniel A.
Department of Study
Civil & Environmental Eng
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2011-05-25T15:04:35Z
Keyword(s)
  • structural health monitoring
  • smart sensor
  • decentralized data processing
  • multimetric sensing
  • decentralized modal analysis
Abstract
Wireless Smart Sensor Networks (WSSNs) facilitates a new paradigm to structural identification and monitoring for civil infrastructure. Conventionally, wired sensors and central data acquisition systems have been used to characterize the state of the structure, which is quite challenging due to difficulties in cabling, long setup time, and high equipment and maintenance costs. WSSNs offer a unique opportunity to overcome such difficulties. Recent advances in sensor technology have realized low-cost, smart sensors with on-board computation and wireless communication capabilities, making deployment of a dense array of sensors on large civil structures both feasible and economical. However, as opposed to wired sensor networks in which centralized data acquisition and processing are common practice, WSSNs require decentralized algorithms due to the limitation associated with wireless communication; to date such algorithms are limited. This research develops new decentralized algorithms for structural identification and monitoring of civil infrastructure. To increase performance, flexibility, and versatility of the WSSN, the following issues are considered specifically: (1) decentralized modal analysis, (2) efficient decentralized system identification in the WSSN, and (3) multimetric sensing. Numerical simulation and laboratory testing are conducted to verify the efficacy of the proposed approaches. The performance of the decentralized approaches and their software implementations are validated through full-scale applications at the Irwin Indoor Practice Field in the University of Illinois at Urbana-Champaign and the Jindo Bridge, a 484 meter-long cable-stayed bridge located in South Korea. This research provides a strong foundation on which to further develop long-term monitoring employing a dense array of smart sensors. The software developed in this research is opensource and is available at: http://shm.cs.uiuc.edu/.
Graduation Semester
2011-05
Permalink
http://hdl.handle.net/2142/24248
Copyright and License Information
Copyright 2011 Sung Han Sim

Owning Collections

Dissertations and Theses - Civil and Environmental Engineering
Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at Illinois