• Title/Summary/Keyword: subway induced vibration

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MODEL FOR SUBWAY-INDUCED STRUCTURAL VIBRATION (지하철 진동이 구조물에 미치는 영향분석 모델)

  • 김희철;이동근;민경원
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1993.10a
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    • pp.199-204
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    • 1993
  • Noise and vibration induced by subway operation are one of the major factor that annoying residents living near the. railway. In general, lateral vibration was the major concern when we are considering vibration of the building. Since the energy due to earthquake is enormous it affects wide area. However, the vertical vibration became a major concern in considering the vibration induced by subway because relatively smaller energy affects only nearby areas than that of earthquake. Analysis model of the structure for the vertical vibration should consider the effect of beam vibration. Thus, the model of the structure for the lateral vibration can not be applied. Appropriate analysis model which can consider the inertia force of the beam is necessary when analyzing a structure for the vertical vibration. Modeling technique for the vertical vibration analysis of structures has been studied on this paper. It is recommeneded to use 2 or more elements for columns and to use 3 or more elements for beams when analyzing structures for vertical vibration induced by subway.

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Serviceability assessment of subway induced vibration of a frame structure using FEM

  • Ling, Yuhong;Gu, Jingxin;Yang, T.Y.;Liu, Rui;Huang, Yeming
    • Structural Engineering and Mechanics
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    • v.71 no.2
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    • pp.131-138
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    • 2019
  • It is necessary to predict subway induced vibration if a new subway is to be built. To obtain the vibration response reliably, a three-dimensional (3D) FEM model, consisting of the tunnel, the soil, the subway load and the building above, is established in MIDAS GTS NX. For this study, it is a six-story frame structure built above line 3 of Guangzhou metro. The entire modeling process is described in detail, including the simplification of the carriage load and the determination of model parameters. Vibration measurements have been performed on the site of the building and the model is verified with the collected data. The predicted and measured vibration response are used together to assess vibration level due to the subway traffic in the building. The No.1 building can meet work and residence comfort requirement. This study demonstrates the applicability of the numerical train-tunnel-soil-structure model for the serviceability assessment of subway induced vibration and aims to provide practical references for engineering applications.

Vibration of Massive Tunnel Structure Induced by Subway Operation (지하철 운행에 의한 중량터널의 진동)

  • 김희철;신효근
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1995.04a
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    • pp.114-121
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    • 1995
  • Problems of noise and vibration induced by subway operation became one of the major factor when new subway 1 me is under consideration. One of the most economic method in reducing the noise and vibration is the increasement of the tunnel mass. . Vibration of the massive tunnel structure has been measured induced by subway operation. STEDEF system which was adopted by Seoul Metropolitan Subway Bureau has been proved that more than 99% of the vibration has been decreased at the bottom of the railway track. Most of the vibration measured inside and outside of the tunnel showed that their peak frequency is around SOHz or 100Hz. The propagation characteristics of vibration in massive tunnel , wave propagate in three directions. Overall frequency in the range of 0 to 125H2 horizontal transmission usually increase, while vertical transmission decreases about 50% in the range of 0 to 25Hz and 90Hz to 125Hz regardless of modal shape.

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Dynamic Response of Building Structures Induced by Subway Operation (지하철 진동에 의한 건축구조물의 진동특성)

  • 김희철;이동근;민경원
    • Computational Structural Engineering
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    • v.8 no.1
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    • pp.95-106
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    • 1995
  • Noise and vibration induced by subway operation are one of the major factor that annoy residents living near the subway tracks. In general, lateral vibration is the major concern when we are considering vibration of a building. However, the vertical vibration is the major concern in considering the vibration induced by the subway operation. Analysis model for the vertical vibration of the structure should consider the effect of beam vibration. Thus, the same model used for the lateral vibration analysis can not be used for an analysis of vertical vibration of the structure. Appropriate analysis model which can consider the inertia force of the beam is necessary when analyzing a structure for the vertical vibration. Modeling technique for the vertical vibration analysis of structures has been studied on this paper. It is recommended to use one or more elements for columns and to use two or more elements for beams when analyzing structures for vertical vibration induced by subway operation.

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Study on the Improvement of Empirical Formula for Prediction of Ground Vibration Induced by Urban Rapid Transit (도시철도 지반진동 예측식 개선에 관한 연구)

  • Shin, Han-Chul;Cho, Sun-Kyu;Yang, Shin-Chu
    • Journal of the Korean Society for Railway
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    • v.12 no.3
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    • pp.357-363
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    • 2009
  • In this paper, field measurements in the subway tunnel and adjacent building were performed to predict the pound vibration level induced by urban rapid transit (subway) in Seoul, Korea. From the results of the measurements, the measured ground vibration level induced by subway in Seoul is smaller than the empirical formula of New York, but it is bigger than the empirical formula of Tokyo which has been commonly used in Korea. We suggested the empirical formula for prediction of ground vibration level induced by subway in Seoul considering on the wave propagation path for soils or rocks, respectively.

A Study on the Characteristics of Vibration Induced by Subway Operation (지하철 운행에 따른 진동특성에 관한 연구)

  • 배동명;신창혁;최철은;박상곤;백용진
    • Journal of KSNVE
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    • v.11 no.2
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    • pp.249-256
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    • 2001
  • In this paper the characteristics of vibration induced by subway trains running on track is discussed. The quantitative prediction of the vibration level and the countermeasure for reduction of necessary, is of importance for the better environment. It was made the constructed Bundang line as first step with the modified Young-Dan type to basis on the Japanese Young-Dan type. In this paper it was measured and analyzed to two region ($ \circled1$Susuh-Bokjung. $ \circled2$Chorim-Suhyun region) of this. at present, operational Bundang line when averaging velocity of train is 60 (km/h). As the response characteristics of frequency Induced by subway operation, it was confirmed that frequency band of neighborhood of 30~80 Hz in generally dominant. Also to assess the quantitative nitration as response level to be measured for each point of two region in subway operation, the vibrational response level was measured at the state to be not subway operation. And the level was approximately $\fraction one-fifth~\fraction one-ten$ level comparing to subway operation.

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Reduction and Evaluation of Subway Induced Vibration Effects on Surrounding Buildings (지하철 운행에 의한 인접건물의 진동영향 평가 연구)

  • Park, Ji-Hun;Min, Kyung-Won;Lee, Roo-Jee;Choi, Seok-Joo;Yum, Sung-Kon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.05a
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    • pp.738-742
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    • 2005
  • Ground vibration at Gil-dong in Seoul induced by the 5th ling of Seoul Subway is predicted using various prediction methods and compared with measured vibration. Also, several issues on the improvement of prediction methods are discussed. Furthermore, as an alternative vibration source, measured vibration acceleration level(VAL) on the tunnel wall of the Bundang line of Seoul Subway is applied to the prediction of the VAL at the location mentioned previously. Then requirements accompanied to the suggestion of the new vibration source appropriate to the condition of Seoul Subway.

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Study for the prediction of ground-borne vibration induced by subway (지하철에 의한 지반 진동 예측에 관한 연구)

  • 이재원;김득성;장서일
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.11b
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    • pp.1287-1292
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    • 2001
  • Subway train-induced ground-borne vibration is studied. Previously used vibration level prediction equations are reviewed. Measured vibration levels are compared with the predicted results and numerically computed results. The results show that vibration level does not decrease proportionally with the distance.

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A Study on the characteristics of vibration induced by Subway operation (지하철 운행에 따른 진동특성에 관한 연구)

  • 배동명;신창혁;이창훈;박상곤
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2000.04b
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    • pp.332-339
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    • 2000
  • In this paper the characteristics of vibration induced by subway trains running on track is discussed. The quantitative prediction of the vibration level and the countermeasure for reduction of necessary, is of importance for the better environment. It was made the constructed Bundang line as first step with the modified Young-Dan type to basis on the Japanese Young-Dan type. In this paper it was measured and analyzed to two region (①Susuh-Bokjung, ②Chorim-Suhyun region) of this, at present operational Bundang line when averaging velocity of train is 60(㎞/h). As the response characteristics of frequency induced by subway operation, it was confirmed that frequency band of neighborhood of 30∼80Hz in generally dominant. Also to assess the quantitative vibration as response level to be measured for each point of two region in subway operation, the vibrational response level was measured at the state to be not subway operation. And the level was approximately 1/5∼1/10 level comparing to subway operation.

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Vertical Z-vibration prediction model of ground building induced by subway operation

  • Zhou, Binghua;Xue, Yiguo;Zhang, Jun;Zhang, Dunfu;Huang, Jian;Qiu, Daohong;Yang, Lin;Zhang, Kai;Cui, Jiuhua
    • Geomechanics and Engineering
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    • v.30 no.3
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    • pp.273-280
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    • 2022
  • A certain amount of random vibration excitation to subway track is caused by subway operation. This excitation is transmitted through track foundation, tunnel, soil medium, and ground building to the ground and ground structure, causing vibration. The vibration affects ground building. In this study, the results of ANSYS numerical simulation was used to establish back-propagation (BP) neural network model. Moreover, a back-propagation neural network model consisting of five input neurons, one hidden layer, 11 hidden-layer neurons, and three output neurons was used to analyze and calculate the vertical Z-vibration level of New Capital's ground buildings of Qingdao Metro phase I Project (Line M3). The Z-vibration level under different working conditions was calculated from monolithic roadbed, steel-spring floating slab roadbed, and rubber-pad floating slab roadbed under the working condition of center point of 0-100 m. The steel-spring floating slab roadbed was used in the New Capital area to monitor the subway operation vibration in this area. Comparing the monitoring and prediction results, it was found that the prediction results have a good linear relationship with lower error. The research results have good reference and guiding significance for predicting vibration caused by subway operation.