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Title: Modeling and Field Testing the Railway Foundation Under Long-Term Rail Fatigue Loads
Accession Number: 01594362
Record Type: Component
Abstract: The concrete foundation in a railway tunnel settles gradually following long-term exposure to repeated loads by trains on the track. The authors established four numerical models simulating four different structures of the foundation of a railway tunnel and their structural responses under the loads by trains and verified the methodology by field testing two of them. With these models, the authors examined the relationship between the train velocity and the vertical dynamic coefficient, demonstrated that the damages in the concrete foundation resulted from fatigue damage accumulation due to repeated loads and found that the damages mainly occurred in the longitudinal direction, immediately below the two rails. In concrete foundations with rebar, the attenuation rate of stress was higher than those without rebar, thus having better structural responses. In conclusion, the authors advise to increase the reinforcement ratio of the concrete foundation of tunnel railways to improve their structural responses.
Supplemental Notes: This paper was sponsored by TRB committee AR050 Standing Committee on Railroad Track Structure System Design.
Monograph Title: Monograph Accession #: 01584066
Report/Paper Numbers: 16-2338
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Huang, L CCheng, YChen, QuanPagination: 12p
Publication Date: 2016
Conference:
Transportation Research Board 95th Annual Meeting
Location:
Washington DC, United States Media Type: Digital/other
Features: Figures; Photos; References; Tables
TRT Terms: Uncontrolled Terms: Subject Areas: Design; Railroads
Source Data: Transportation Research Board Annual Meeting 2016 Paper #16-2338
Files: TRIS, TRB, ATRI
Created Date: Jan 12 2016 5:02PM
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