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A platform for research: civil engineering, architecture and urbanism
Critical threshold value for monitoring & management of cable tension force in cable-stayed bridge
This paper presents a methodology for the probabilistic determination of managing criteria for cable tension force monitoring in cable-stayed bridges using acceleration data acquired by the monitoring system. There are many long span bridges installed with monitoring system in the world. The monitoring systems are installed to diagnose abnormal behavior or damage in bridges and to warn it to bridge management agency. In cable-stayed bridges, the cable tension force could be an important indicator of abnormal behavior because of the geometric configuration of the cable-stayed bridge. Thus, many monitoring systems are employed to monitor the cable tension force by acquiring acceleration data from vibrating cables. To detect the abnormal behavior of a bridge, the bridge management agency sets a critical threshold value formonitoring and management of cable tension forces. If the critical value is set too high or too low, then the monitoring system could not properly warn the abnormal behavior of a bridge. Therefore the rational determination of managing criteria for cable tension force is so important to warn abnormal behavior or damages. Generally, the managing criteria are set by empirical or engineering judgment, so those criteria is obscure. In this paper, the concept of probability distribution model for the cable force and reliability analysis is used for the determination of managing criteria for cable tension force monitoring. In order to verify the proposed methodology, existing cable-stayed bridge was applied.
Critical threshold value for monitoring & management of cable tension force in cable-stayed bridge
This paper presents a methodology for the probabilistic determination of managing criteria for cable tension force monitoring in cable-stayed bridges using acceleration data acquired by the monitoring system. There are many long span bridges installed with monitoring system in the world. The monitoring systems are installed to diagnose abnormal behavior or damage in bridges and to warn it to bridge management agency. In cable-stayed bridges, the cable tension force could be an important indicator of abnormal behavior because of the geometric configuration of the cable-stayed bridge. Thus, many monitoring systems are employed to monitor the cable tension force by acquiring acceleration data from vibrating cables. To detect the abnormal behavior of a bridge, the bridge management agency sets a critical threshold value formonitoring and management of cable tension forces. If the critical value is set too high or too low, then the monitoring system could not properly warn the abnormal behavior of a bridge. Therefore the rational determination of managing criteria for cable tension force is so important to warn abnormal behavior or damages. Generally, the managing criteria are set by empirical or engineering judgment, so those criteria is obscure. In this paper, the concept of probability distribution model for the cable force and reliability analysis is used for the determination of managing criteria for cable tension force monitoring. In order to verify the proposed methodology, existing cable-stayed bridge was applied.
Critical threshold value for monitoring & management of cable tension force in cable-stayed bridge
Cho, Hyo Nam (author) / Choi, Young Min (author) / Lee, Sung Chil (author) / Kang, Kyung Koo (author) / Choi, Man Yong (author)
2004
6 Seiten, 4 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
Critical Threshold Value for Monitoring & Management of Cable Tension Force in Cable-Stayed Bridge
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