Fatigue Behavior Evaluation of Full-Field Hangers in a Rigid Tied Arch High-Speed Railway Bridge: Case Study
Publication: Journal of Bridge Engineering
Volume 23, Issue 5
Abstract
The steel truss arch is an important structural type for high-speed railway bridges with long spans. The fatigue assessment of rigid hangers under long-term train loads is an important concern. In this study, the Nanjing Dashengguan Bridge, a six-line railway steel arch bridge with three planes of truss arches and the largest span in the world, was taken as a case study. First, a fatigue assessment of one short hanger was carried out based on dynamic strain monitoring data in 2015. The influence of bending behavior, train lane, number of carriages, and train speed on the fatigue performance of the short hanger were investigated. Second, the fatigue damage distribution of full-field hangers induced by a single train was analyzed based on a calibrated finite-element model. The influence of driving direction on the fatigue performance of rigid hangers was discussed. Finally, an engineering approach for fatigue performance assessment of full-field hangers was proposed based on annual train volume. Consequently, it was shown that the bending behavior has considerable influence on the fatigue effects of short hangers. In addition, train lane and driving direction also have a significant influence on the fatigue performance of hangers. The fatigue damage of short hangers in the middle truss arch was the most remarkable, followed by the side truss arch on the downstream side (the Beijing–Shanghai High Speed Railway) and then by the side truss arch on the upstream side (the Shanghai–Wuhan–Chengdu Railway), which should be paid greater attention to in daily maintenance.
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Acknowledgments
The authors gratefully acknowledge the National Basic Research Program of China (973 Program) (No. 2015CB060000), the Key Program of National Natural Science Foundation (No. 51438002), the Program of National Natural Science Foundation (Nos. 51578138, 51508251, and 51608258), and the Fundamental Research Fund for the Central Universities (No. 2242016K41066).
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 23 • Issue 5 • May 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Aug 10, 2017
Accepted: Nov 22, 2017
Published online: Mar 12, 2018
Published in print: May 1, 2018
Discussion open until: Aug 12, 2018
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