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- W2788807600 abstract "This paper presents the current status of a USKorea collaborative research on bridge health monitoring testbeds. The objective of the project is to integrate and validate cutting-edge sensors and structural health monitoring methods under development for monitoring the long-term performance and structural integrity of highway bridges. Emerging sensors and monitoring technologies are investigated such as: (1) reference-free local damage detection using mode conversion of polarized piezoelectric ceramic sensors, (2) piezoelectric paint sensors offering a blending of the high piezoelectric activity of the organiz synthetic polymer, (3) wireless active sensor nodes for local damage detection based on electromechanical impedance measurement, (4) elastomagnetic (EM) sensors to estimate the tensile stress state of cables, tendons, or reinforcement bar, (5) wireless sensor networks for economical health monitoring without labor-intensive tethering works, (6) robust vibration-based global monitoring using deflections obtained from modal flexibility, (7) vision-based bridge deflection measurement using a commercial low-cost camcorder with high fidelity, and (8) bridge rating based on system identification technique using ambient vibration measurement without blocking the passing traffic. As to the testbeds, three bridges on the test road by the Korea Expressway Corporation (KEC) are under investigation as in Figure 1. They are of different structural types as a PC box-girder bridge, a steel box-girder bridge, and a steel plate-girder bridge as in Figure 2 (Lee et al., 2004). The traffic on the test road section may be controlled, so that tests on the bridges may be carried out with the ordinary traffic or the calibrated traffic loads. Currently, basic facilities including internet lines have been constructed on the testbeds, and the participants carried out the preliminary tests by connecting their own measurement and monitoring systems in the local area network environment at the bridge site. The participants can access and control their measurement systems by using Remote Desktop in Windows XP through internet. In addition to these three highway bridges, a cable-supported bridge is going to be selected as the fourth testbed structure for this study in the near future. Researchers interested in this testbed are encouraged to join in the collaborative research. Figure 1. KEC test-road with three bridges (a) Geumdang (b) Yondai (c) Samseung Figure 2. Three test-road bridges" @default.
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- W2788807600 date "2008-05-01" @default.
- W2788807600 modified "2023-09-23" @default.
- W2788807600 title "US-Korea collaborative research for bridge monitoring testbeds" @default.
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