Structural health monitoring of a cable-stayed bridge using wireless smart sensor technology: data analyses

Abstract

This paper analyses the data collected from the 2 nd 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 cables to capture the vibration of the bridge excited by traffic and environmental loadings. Analysis of the data is performed in both the time and frequency domains. Modal properties of the bridge are identified using the frequency domain decomposition and the stochastic subspace identification methods based on the output-only measurements, and the results are compared with those obtained from a detailed finite element model. Tension forces for the 10 instrumented stay cables are also estimated from the ambient acceleration data and compared both with those from the initial design and with those obtained during two previous regular inspections. The results of the data analyses demonstrate that the WSSN-based SHM system performs effectively for this cable-stayed bridge, giving direct access to the physical status of the bridge.

Feasibility Study of Micro-Wind Turbines for Powering Wireless Sensors on a Cable-Stayed Bridge

“…In one recent achievement, 70 wireless sensors were installed on the second Jindo Bridge in South Korea in 2009 to monitor the long-term structural behavior of the bridge [1,2]. Most of the sensor nodes were operated by high-capacity D-cell batteries, which are very heavy and large in comparison to the WSs.…”

Finite element modeling of the dynamic response of a composite reinforced concrete bridge for structural health monitoring

“…The second category is made up of recent developments in electronic data storage and computer data acquisition. Experimental methods such as wired or wireless sensors network systems were utilized mostly on superstructure to use in SHM (Farhey 2006;Wang et al 2007;Lynch 2007;Kim et al 2007;Cho et al 2010;Stajano et al 2010;Yun and Min 2011).…”

Analysis and Research on Deformation Monitoring of Large Span Cable-stayed Bridge during Operating Period

“…There are many related researches about deformation monitoring of long-span cable-stayed in China and abroad (Chen, Zhang, Zhou, Song, & Huang, 2013;Cho et al, 2010;Lekidis, Papadopoulos, Karakostas, & Sextos, 2013;Li, & Ou, 2006a, 2006bMacdonald, 2003;Si, Au, & Li, 2013;Zengshun, Jun, Cheng, Guanrong, & Haoyang, 2013). Li Shunlong and other researchers assessed the conditions of stayed cable and damage monitoring of girder through the structural health monitoring system (Li et al, 2014).…”

“…Li Shunlong and other researchers assessed the conditions of stayed cable and damage monitoring of girder through the structural health monitoring system (Li et al, 2014). Cho, Soojin used wireless smart sensor technology to monitor the health of cable-stayed bridge under vibration load monitoring (Cho et al, 2010). However, the contents of the monitoring for large span cable-stayed bridge system are not comprehensive enough, especially in short-term deformation monitoring.…”