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Evaluation of ground vibration induced by high-speed trains on bridge structures

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A wide variety of field-measured data are used to evaluate the characteristics of ground vibration as induced by Taiwan high-speed trains on bridge structures. The measurements for analysis consist of various foundation types, geological conditions, and train speeds. Both near-field vibration (25 m from track center) and far-field vibration propagation are evaluated. Based on the results, the deep foundation in alluvium soils and the shallow foundation in rocks show higher near-field vibration level, whereas the foundation in gravelly soils has smaller vibration. The vibration level decreases with increasing concrete volume of structure and decreasing train speed. For vibration propagation, shallow foundations present higher vibration attenuation coefficients than those of deep foundations. Furthermore, the vibration attenuation is frequency dependent, and the vibration attenuation coefficient at low frequency range is much smaller compared with the coefficients at the middle and high frequency ranges. Based on these analyses, specific influence factors for ground vibration assessment are given.
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Keywords: 13.4; 43.2.3

Document Type: Research Article

Publication date: July 1, 2011

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