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2024 Vol.20, Issue 3 Preview Page

Original Article

Study on Vibration Reduction Rates of Barrier Walls under Load Transmission of High-Speed Trains at 180 km/h

시속 180 km 고속열차 하중전달시 차단벽의 진동저감율 연구

김영민1ㆍ최성욱2ㆍ이강일3*

Young-Min Kim1, Sung-Wook Choi2, Kang-Il Lee3*

1Graduate Student, Department of Civil Engineering, Daejin University, Pocheon, Republic of Korea
2Ph.D. Candidate, Department of Civil Engineering and Environment Engineering, Daejin University, Pocheon, Republic of Korea
3Professor, Department of Smart Construction and Environment Engineering, Daejin University, Pocheon, Republic of Korea
30 September 2024. pp. 549-562
PDF Citation
Abstract
Purpose: In this study, numerical analysis was conducted to verify the vibration reduction effect of installing vibration barriers under various installation conditions to mitigate train-induced vibrations from the GTX. Method: To identify the factors influencing vibration reduction among the installation conditions, the stiffness ratio of the filling material and the installation depth of the barrier were varied. Result: The study results indicated that using ductile filling materials provided superior vibration reduction compared to hard filling materials. The vibration reduction effect was found to be more significant when the stiffness ratio between the ground and the filling material was closer to zero. Additionally, the deeper the installation depth of the barrier, the better the vibration reduction effect. Conversely, if the barrier was installed too shallowly, vibration at the measurement point was amplified. Conclusion: The optimal installation condition for vibration reduction was found to be a stiffness ratio of 0.08 and an installation depth of 15 meters, resulting in a vibration reduction rate of 60.34% at a measurement point 10 meters away from the vibration source.
Keywords
Vibration Barrier
Vibration Reduction Rate
GTX
Stiffness Ratio
Depth of the Vibration Barrier
연구목적: 본 연구는 수도권 광역급행열차 운행에 따른 열차진동을 진동차단벽을 설치하여 저감시키는 경우 차단벽의 설계조건에 따른 진동저감효과를 확인하였다. 연구방법: 설계조건 중 진동저감에 영향을 끼치는 인자를 파악하기 위해 설계조건 중 채움재의 강성비와 차단벽의 설치심도만을 달리하여 결과를 확인하였다. 연구결과: 채움재는 강성채움재보단 연성채움재를 사용한 경우 진동저감효과가 더 뛰어났으며 연성채움재의 경우 지반과 채움재간의 강성비가 0에 가까울수록 진동저감효과가 뛰어난 것으로 나타났다. 또한 차단벽의 설치심도가 깊을수록 진동차단효과가 대체적으로 뛰어난 것으로 나타났으며 차단벽의 심도가 너무 얕은 경우 오히려 수진점에서 진동이 증폭하는 현상이 발생하였다. 결론: 진동저감효과가 가장 뛰어난 설계조건은 강성비 0.08, 설치심도 15 m인 경우로 이 때 진동원과 10 m 떨어진 수진점에서의 진동저감율은 60.34%로 나타났다.
키워드
진동차단벽
감쇠비
수도권광역급행열차
강성비
진동차단벽 심도
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Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 20
  • No :3
  • Pages :549-562
  • DOI :https://doi.org/10.15683/kosdi.2024.9.30.549
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