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Doctoral Student, Dept. of Civil and Environmental Engineering, KAIST, Daejeon, South Korea. E-mail: zelos@kaist.ac.kr, jwp@kaist.ac.kr Doctoral Student, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, IL, USA. E-mail: sjang4@uiuc.edu, hjo4@illinois.edu Professor, Dept. of Civil and Environmental Engineering, KAIST,(More)
Structural health monitoring (SHM) of civil infrastructure using wireless smart sensor networks (WSSNs) has received significant public attention in recent years. The benefits of WSSNs are that they are low-cost, easy to install, and provide effective data management via on-board computation. This paper reports on the deployment and evaluation of a(More)
In this study, the feasibility of using micro-wind turbines to power wireless sensors on a cable-stayed bridge is comprehensively investigated. To this end, the wind environment around a bridge onto which a turbine is installed is examined, as is the power consumption of a wireless sensor. Feasible alternators and rotors are then carefully selected to make(More)
Wireless sensor networks (WSNs) are an attractive alternative to traditional tethered systems for monitoring and feedback control of civil structures. In civil engineering, research has focused on the application of WSN to structural health monitoring (SHM); as a result, hardware has been tailored to SHM applications. However, the real-time performance(More)
This paper analyses the data collected from the 2 Jindo Bridge, a cable-stayed bridge in Korea that is a structural health monitoring (SHM) international test bed for advanced wireless smart sensors network (WSSN) technology. The SHM system consists of a total of 70 wireless smart sensor nodes deployed underneath of the deck, on the pylons, and on the(More)
Wireless smart sensor networks (WSSN) facilitate a new paradigm for structural health monitoring (SHM) of civil infrastructure. Conventionally, SHM systems employing wired sensors and centralized data acquisition have been used to characterize the state of a structure; however, widespread implementation has been limited due to high costs and difficulties in(More)
Visualized strain/stress sensing is receiving interests in structural health monitoring area, but former approaches cannot be effectively applied to civil infrastructure monitoring, because of limited sensitivity to low-level response and/or limited response to civil structures for both static and dynamic strain/stress. This paper presents a(More)
Direct measurements of external forces acting on a structure are infeasible in many cases. The Augmented Kalman Filter (AKF) has several attractive features that can be utilized to solve the inverse problem of identifying applied forces, as it requires the dynamic model and the measured responses of structure at only a few locations. But, the AKF(More)
16 This paper presents a novel large-area strain sensing technology for monitoring fatigue cracks in 17 steel bridges. The technology is based on a soft elastomeric capacitor (SEC), which serves as a 18 flexible and large-area strain gauge. Previous experiments have verified the SEC’s capability to 19 monitor low-cycle fatigue cracks experiencing large(More)
Many of the available SHM approaches neither readily support displacement monitoring nor work in concert with one another to take advantage of displacement-based SHM for various long-period structures. Although surveyquality GPS technology offers the possibility of measuring such displacements with sub-centimeter precision, the associated cost is too high(More)
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