사장교 케이블-정착부 부구조계의 진동-임피던스 기반 구조건전성 모니터링에 관한 연구

Abstract

In this study, vibration and impedance-based structural health monitoring (SHM) techniques are investigated to monitor cable force and anchorage force in cable-anchorage subsystem of cable-stayed bridge. To achieve the objective, the following approaches are implemented. Firstly, vibration and impedance-based SHM techniques for cable-anchorage subsystem is presented. Four cable force estimation methods, which include beam model, string model, Zui’s model and Shimada’s model are selected for the vibration-based SHM. Secondly, for the impedance-based methods, two impedance analysis methods such as correlation coefficients and root mean square deviation are selected to monitor anchorage force change. Thirdly, the selected SHM methods are experimentally evaluated on a lab-scale model of cable-anchorage subsystem. Finally, the practicality of the selected SHM methods are examined from field tests on a real cable-stayed bridge.