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Publications on Evaluation of ground vibration induced by an urban train system

Evaluation of ground vibration induced by an urban train system
Y.J. Chen ; Y-J Shen ; S-H Ni
Book Title / Journal: IAEG2006
Year: 2006
Instrumentation
Keywords: Vibration ; railroads ; environmental impact ; Environmental protection ; Bridges
  • Description
    • In recent years, more and more vibration sensitive buildings are located near the planned route of urban train systems, thus the ground vibrations induced by train systems have drawn engineer's interest. In previous research this area has focused on the vibration characteristics and mitigation methods. Research on these two subjects has progressed well. However, the evaluation methods for the train-induced vibration among current assessments present obvious differences. The main purpose of this research is to examine these evaluation methods using field measured data. The evaluation methods from different available representative assessments are reviewed briefly, and then a series of field vibration measurements of urban train systems were compared with these evaluation methods. For the site vibration measurement, the three-dimensional Tokyo Sokushin Model 15D servo-type velocity transducer will be used to measure the velocity level of vibration. The sampling frequency used for time domain data is 512 Hz. The HP 3565S Vista system is mainly used to collect the data and to analyze the dynamic signals. The frequency response is presented using one-third octave band for the central frequency ranged from 1 to 100 Hz. The measurements include a wide variety of soil and structure conditions. The main vibration sources include rapid transit system and ordinary railway system with different speeds on different train supporting structures, such as on concrete or steel bridges. A broad base of geological conditions (including soil, gravel and rock) and foundation types such as spread footing and pile foundation are used for this evaluation. These various conditions present different vibration characteristics. Based on this evaluation, the suitability of each vibration assessment method is presented and some recommendations for further studies are proposed.
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