US-Korea collaborative research for bridge monitoring test beds

Abstract

This paper presents an interim report on an international collaborative research project between the United States and Korea that fundamentally addresses the challenges associated with integrating structural health monitoring (SHM) system components into a comprehensive system for bridges. The objective of the project is to integrate and validate cutting-edge sensors and SHM methods under development for monitoring the long-term performance and structural integrity of highway bridges. A variety of new sensor and monitoring technologies have been selected for integration including wireless sensors, EM stress sensors and piezoelectric active sensors. Using these sensors as building blocks, the first phase of the study focuses on the design of a comprehensive SHM system that is deployed upon a series of highway bridges in Korea. With permanently installed SHM systems in place, the second phase of the study provides open access to the bridges and response data continuously collected as an internal test-bed for SHM. Currently, basic facilities including Internet lines have been constructed on the test-beds, and the participants carried out tests on bridges on the test road section owned by the Korea Expressway Corporation (KEC) with their own measurement and monitoring systems in the local area network environment. The participants were able to access and control their measurement systems by using Remote Desktop in Windows XP through Internet. Researchers interested in this test-bed are encouraged to join in the collaborative research.

Smart sensing, monitoring, and damage detection for civil infrastructures

“…Various sensing systems have been deployed on the testbed bridges where the internet access was provided for participants so that instruments and measurement systems can be accessed remotely using Remote Desktop software. Each participating group validated the feasibility of their own sensors and data/information processing algorithms (Lee et al, 2006a(Lee et al, , 2006b(Lee et al, , 2007bLynch et al, 2006b;Yun et al, 2009b;An et al, 2009).…”

“…The approach consists of (1) ambient vibration tests on a bridge; (2) identification of modal properties extracted from the ambient acceleration data; (3) enhancement of the initial FE model of the bridge structure based on the identified results; and (4) estimation of the load carrying capacity using the updated FE model. The proposed approach has been validated on various types of bridges by cooperative researches between academia and the bridge authorities in Korea (Yun et al, 2009b).…”

Truck-based mobile wireless sensor networks for the experimental observation of vehicle–bridge interaction

“…Along the length of the test road are three bridges: the Geumdang, Yeondae and Samseung bridges. Unlike the road, the three bridges are not monitored with a permanent set of sensors; rather, past work has monitored the bridges over short periods of time with wired and wireless monitoring systems [33]. This study selects the Geumdang Bridge (figure 1), a concrete bridge with a total length of 272 m, to validate the performance of the proposed wireless monitoring system for vehicle-bridge interaction monitoring.…”

A decentralized procedure for structural health monitoring of uncertain nonlinear systems provided with dense active sensor arrays

“…Noteworthy recent publications that summarize the stateof-the-art of various multidisciplinary aspects of the broad field of SHM in civil, mechanical and aerospace engineering include the works of Kashangaki et al (1992), Dems and Mroz (2001), Sohn et al (2001), Van der Auweraer and Peeters (2003), Lynch et al (2003), Tanner et al (2003), Yun and Bergman (2004), Staszewski et al (2004), Xu et al (2004), Giurgiutiu (2005), Inman et al (2005), Johnson and, Adams (2007), , , Inman (2007) andFriswell (2007).…”