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Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads

The aim of this study is to find out the degradation of dynamic behaviour of bridge girders with trapezoidal profiled webs when subjected to different vehicle moving loads. Finite element modelling based parametric analysis is demonstrated to be desirable in capturing the dynamic deflection and stre...

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Autores principales: Wang, Zhiyu, Shi, Yunzhong, You, Xiang, Jiang, Ruijuan, Gai, Weiming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7795918/
https://www.ncbi.nlm.nih.gov/pubmed/33374199
http://dx.doi.org/10.3390/ma14010038
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author Wang, Zhiyu
Shi, Yunzhong
You, Xiang
Jiang, Ruijuan
Gai, Weiming
author_facet Wang, Zhiyu
Shi, Yunzhong
You, Xiang
Jiang, Ruijuan
Gai, Weiming
author_sort Wang, Zhiyu
collection PubMed
description The aim of this study is to find out the degradation of dynamic behaviour of bridge girders with trapezoidal profiled webs when subjected to different vehicle moving loads. Finite element modelling based parametric analysis is demonstrated to be desirable in capturing the dynamic deflection and stress state of critical structural details of girders. The model is validated in the modal analysis through a comparison with theoretical eigenfrequencies. The vibration characteristics are shown to be significantly affected by the corrugation details. The structural service life results of analysed bridge girders are in close agreement with experimental data. It is shown that the dynamic nodal velocity and deflection of analysed bridge girders are greatly affected by the magnitude of the load corresponding to the overload of the vehicle in contrast to the vehicle travel speed. Similar observations can be made for the fatigue life prediction analysis related to the crack initiation when unfavourable effects of the overload vehicle are concerned. Presented analytical results using a fracture mechanics approach could be taken as a good basis for the service life assessment of related bridges with the desired level of performance or functionality.
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spelling pubmed-77959182021-01-10 Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads Wang, Zhiyu Shi, Yunzhong You, Xiang Jiang, Ruijuan Gai, Weiming Materials (Basel) Article The aim of this study is to find out the degradation of dynamic behaviour of bridge girders with trapezoidal profiled webs when subjected to different vehicle moving loads. Finite element modelling based parametric analysis is demonstrated to be desirable in capturing the dynamic deflection and stress state of critical structural details of girders. The model is validated in the modal analysis through a comparison with theoretical eigenfrequencies. The vibration characteristics are shown to be significantly affected by the corrugation details. The structural service life results of analysed bridge girders are in close agreement with experimental data. It is shown that the dynamic nodal velocity and deflection of analysed bridge girders are greatly affected by the magnitude of the load corresponding to the overload of the vehicle in contrast to the vehicle travel speed. Similar observations can be made for the fatigue life prediction analysis related to the crack initiation when unfavourable effects of the overload vehicle are concerned. Presented analytical results using a fracture mechanics approach could be taken as a good basis for the service life assessment of related bridges with the desired level of performance or functionality. MDPI 2020-12-24 /pmc/articles/PMC7795918/ /pubmed/33374199 http://dx.doi.org/10.3390/ma14010038 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Zhiyu
Shi, Yunzhong
You, Xiang
Jiang, Ruijuan
Gai, Weiming
Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title_full Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title_fullStr Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title_full_unstemmed Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title_short Dynamic Behaviour of Bridge Girders with Trapezoidal Profiled Webs Subjected to Moving Loads
title_sort dynamic behaviour of bridge girders with trapezoidal profiled webs subjected to moving loads
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7795918/
https://www.ncbi.nlm.nih.gov/pubmed/33374199
http://dx.doi.org/10.3390/ma14010038
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