Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge

Long-span cable-stayed bridge (LCB) with unequal-height towers is being designed and constructed in metro lines due to its better adaptability to environment and terrain conditions compared to traditional cable-stayed bridge with equal-height towers. However, the asymmetrical arrangement of towers l...

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Autores principales:	Yuexing Wu, Jianting Zhou, Jinquan Zhang, Qiang Wen, Xuan Li
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/d3498115aade4c8e8ca7e7f39ecde7d4
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id	oai:doaj.org-article:d3498115aade4c8e8ca7e7f39ecde7d4
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spelling	oai:doaj.org-article:d3498115aade4c8e8ca7e7f39ecde7d42021-11-29T00:56:08ZTrain-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge1875-920310.1155/2021/8512197https://doaj.org/article/d3498115aade4c8e8ca7e7f39ecde7d42021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/8512197https://doaj.org/toc/1875-9203Long-span cable-stayed bridge (LCB) with unequal-height towers is being designed and constructed in metro lines due to its better adaptability to environment and terrain conditions compared to traditional cable-stayed bridge with equal-height towers. However, the asymmetrical arrangement of towers leads to obvious nonuniformity of the structural stiffness along the longitudinal direction, which intensifies the wheel-rail coupled vibration behaviour, and affects the running safety of operating trains and ride comfort. Therefore, train-bridge dynamic behaviour of long-span asymmetrical-stiffness cable-stayed bridge is deeply investigated in this work. Primarily, considering the comprehensive index of frequency difference and modal assurance criterion (MAC), a nonlinear model updating technique (NMUT) based on penalty function theory is proposed, which can be used to optimize the bridge numerical model. Secondly, on the basis of the train-track-bridge dynamic interaction theory (TDIT), a train-track-bridge coupled dynamic model (TCDM) is established. Finally, a LCB with unequal-height towers is applied as a case to illustrate the influence of asymmetrical stiffness on the train-track-bridge dynamic characteristics. Results show that the proposed NMUT is efficacious and practical. For the LCB with unequal-height towers, a significant difference between the bridge vibration at low tower location and that at high tower location appears. The vertical displacement difference of the main beam on both sides of the bridge increases with the distance from the observation point to the bridge tower increasing. The variation of acceleration difference on both sides of the bridge is influenced by the speed of the train and the position of the observation point simultaneously. In general, vibrations of the main beam at low tower location are larger than those at high tower location.Yuexing WuJianting ZhouJinquan ZhangQiang WenXuan LiHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Yuexing Wu Jianting Zhou Jinquan Zhang Qiang Wen Xuan Li Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
description	Long-span cable-stayed bridge (LCB) with unequal-height towers is being designed and constructed in metro lines due to its better adaptability to environment and terrain conditions compared to traditional cable-stayed bridge with equal-height towers. However, the asymmetrical arrangement of towers leads to obvious nonuniformity of the structural stiffness along the longitudinal direction, which intensifies the wheel-rail coupled vibration behaviour, and affects the running safety of operating trains and ride comfort. Therefore, train-bridge dynamic behaviour of long-span asymmetrical-stiffness cable-stayed bridge is deeply investigated in this work. Primarily, considering the comprehensive index of frequency difference and modal assurance criterion (MAC), a nonlinear model updating technique (NMUT) based on penalty function theory is proposed, which can be used to optimize the bridge numerical model. Secondly, on the basis of the train-track-bridge dynamic interaction theory (TDIT), a train-track-bridge coupled dynamic model (TCDM) is established. Finally, a LCB with unequal-height towers is applied as a case to illustrate the influence of asymmetrical stiffness on the train-track-bridge dynamic characteristics. Results show that the proposed NMUT is efficacious and practical. For the LCB with unequal-height towers, a significant difference between the bridge vibration at low tower location and that at high tower location appears. The vertical displacement difference of the main beam on both sides of the bridge increases with the distance from the observation point to the bridge tower increasing. The variation of acceleration difference on both sides of the bridge is influenced by the speed of the train and the position of the observation point simultaneously. In general, vibrations of the main beam at low tower location are larger than those at high tower location.
format	article
author	Yuexing Wu Jianting Zhou Jinquan Zhang Qiang Wen Xuan Li
author_facet	Yuexing Wu Jianting Zhou Jinquan Zhang Qiang Wen Xuan Li
author_sort	Yuexing Wu
title	Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
title_short	Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
title_full	Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
title_fullStr	Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
title_full_unstemmed	Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge
title_sort	train-bridge dynamic behaviour of long-span asymmetrical-stiffness cable-stayed bridge
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/d3498115aade4c8e8ca7e7f39ecde7d4
work_keys_str_mv	AT yuexingwu trainbridgedynamicbehaviouroflongspanasymmetricalstiffnesscablestayedbridge AT jiantingzhou trainbridgedynamicbehaviouroflongspanasymmetricalstiffnesscablestayedbridge AT jinquanzhang trainbridgedynamicbehaviouroflongspanasymmetricalstiffnesscablestayedbridge AT qiangwen trainbridgedynamicbehaviouroflongspanasymmetricalstiffnesscablestayedbridge AT xuanli trainbridgedynamicbehaviouroflongspanasymmetricalstiffnesscablestayedbridge
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Train-Bridge Dynamic Behaviour of Long-Span Asymmetrical-Stiffness Cable-Stayed Bridge

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