Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Influences of Subgrade Bed Structure on Dynamic Responses of Railway Subgrade Under Train Loading: Field Testing Case Study
Abstract To explore the influences of subgrade bed structure (i.e. the upper part of railway subgrade) on subgrade dynamic responses under train loading, and thus to optimize the design of railway subgrade, this paper presents field tests of cyclic loading for railway subgrade with four different subgrade bed structures (say, different thickness and stiffness). The considered comparisons of subgrade dynamic responses includes the distribution of dynamic stress in railway subgrade, the elastic deformation and dynamic stiffness of subgrade, and the cumulative plastic deformation on subgrade surface. Test results indicate that, the increase of the thickness or stiffness of subgrade bed promotes the attenuation of dynamic stress in subgrade. The more the attenuation of dynamic stress in subgrade, the smaller the accumulative deformation of subgrade. An optimized subgrade dynamic stiffness requires comprehensive matching of both the thickness and stiffness of the layer structures of railway subgrade.
Influences of Subgrade Bed Structure on Dynamic Responses of Railway Subgrade Under Train Loading: Field Testing Case Study
Abstract To explore the influences of subgrade bed structure (i.e. the upper part of railway subgrade) on subgrade dynamic responses under train loading, and thus to optimize the design of railway subgrade, this paper presents field tests of cyclic loading for railway subgrade with four different subgrade bed structures (say, different thickness and stiffness). The considered comparisons of subgrade dynamic responses includes the distribution of dynamic stress in railway subgrade, the elastic deformation and dynamic stiffness of subgrade, and the cumulative plastic deformation on subgrade surface. Test results indicate that, the increase of the thickness or stiffness of subgrade bed promotes the attenuation of dynamic stress in subgrade. The more the attenuation of dynamic stress in subgrade, the smaller the accumulative deformation of subgrade. An optimized subgrade dynamic stiffness requires comprehensive matching of both the thickness and stiffness of the layer structures of railway subgrade.
Influences of Subgrade Bed Structure on Dynamic Responses of Railway Subgrade Under Train Loading: Field Testing Case Study
Xiao, Junhua (Autor:in) / Liu, Chengyu (Autor:in) / Shengyu, Ye (Autor:in) / Wang, Binglong (Autor:in)
28.06.2017
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Railway subgrade , Subgrade bed structure , Dynamic responses , In-situ cyclic loading test Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Vibration, Dynamical Systems, Control , Monitoring/Environmental Analysis , Building Repair and Maintenance , Transportation Technology and Traffic Engineering
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