Prediction model of vehicle-induced vibration of metro depot superstructure based on impedance and power conservation method

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (7) : 62-67.

TAO Ziyu1, WANG Yimin1, ZOU Chao2

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Abstract

To evaluate the impact of the train-induced vibration on human comfort and guide the design of vibration reduction and isolation measures, a computationally efficient vertical vibration prediction model is proposed based on the wave propagation theory. It contains two sub-models. The first one considers the vertical vibration propagates upwards along the structural columns in the form of axial waves and predicts vibration levels at column bases on upper floors using velocities at the platform level column bases as input. The second sub-model accounts for point impedances for beams under beam-floor composite action and predicts the space-time averaged vibrations of a floor bay based on power conservation, using predicted column base velocities from the first sub-model as inputs. The validity of the prediction model is verified by comparing the predictions with field measurements. This research can provide an efficient and simple scientific prediction method and theoretical basis for the train-induced vibration within over-track buildings.

Key words

Metro depot / over-track building / train-induced vibration / prediction model / wave propagation / point impedance / power conservation

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TAO Ziyu1, WANG Yimin1, ZOU Chao2. Prediction model of vehicle-induced vibration of metro depot superstructure based on impedance and power conservation method[J]. Journal of Vibration and Shock, 2022, 41(7): 62-67

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