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Ground Vibration of Viaduct and Pile-Group Foundation Induced by Moving High-Speed Train
Semi-analytical coupling model of train, track-bridge, bridge pier, group-pile foundation was established. Train was simulated by a mass-spring-damping model, and the bridge vibration was solved by incorporating the slab track equation of motion into the bridge model. Combined with pile-group foundation model, the ground vibration analysis model of viaduct with pile-group foundation under high-speed railway loading was established. Vibration of the upper stiff-layer and lower soft-layer ground and the upper soft-layer and lower stiff-layer ground was studied. Moreover, the influence of pile parameters on the ground vibration was analyzed. Results indicate that the vibration in the pile center of the upper stiff-layer and lower soft-layer ground is larger than that of the upper soft-layer and lower stiff-layer ground when the vehicle speed is less than 300 km/h. For the upper soft-layer and lower stiff-layer ground, the ground vibration acceleration increases significantly at the speed of 350 km/h due to the vehicle speed is close to the shear-wave velocity of surface soft soil, hence the speed of train should be avoided to approach the shear wave of the surface soil. Acceleration of ground vibration induced by a moving train increases with increasing pile diameter and pile length, particularly for high vehicle speeds. Appropriate design of group-pile foundation can reduce the ground vibration.
Ground Vibration of Viaduct and Pile-Group Foundation Induced by Moving High-Speed Train
Semi-analytical coupling model of train, track-bridge, bridge pier, group-pile foundation was established. Train was simulated by a mass-spring-damping model, and the bridge vibration was solved by incorporating the slab track equation of motion into the bridge model. Combined with pile-group foundation model, the ground vibration analysis model of viaduct with pile-group foundation under high-speed railway loading was established. Vibration of the upper stiff-layer and lower soft-layer ground and the upper soft-layer and lower stiff-layer ground was studied. Moreover, the influence of pile parameters on the ground vibration was analyzed. Results indicate that the vibration in the pile center of the upper stiff-layer and lower soft-layer ground is larger than that of the upper soft-layer and lower stiff-layer ground when the vehicle speed is less than 300 km/h. For the upper soft-layer and lower stiff-layer ground, the ground vibration acceleration increases significantly at the speed of 350 km/h due to the vehicle speed is close to the shear-wave velocity of surface soft soil, hence the speed of train should be avoided to approach the shear wave of the surface soil. Acceleration of ground vibration induced by a moving train increases with increasing pile diameter and pile length, particularly for high vehicle speeds. Appropriate design of group-pile foundation can reduce the ground vibration.
Ground Vibration of Viaduct and Pile-Group Foundation Induced by Moving High-Speed Train
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Chen, Xiaobin (editor) / Xiao, Yuanjie (editor) / Gao, Guang-yun (author) / Xie, Wei (author) / Song, Jian (author)
Advances in Environmental Vibration and Transportation Geodynamics ; Chapter: 23 ; 361-374
2020-04-08
14 pages
Article/Chapter (Book)
Electronic Resource
English
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