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2022 Vol.32, Issue 1 Preview Page

Research Article

Acceleration Amplification Analysis according to Changes in Laminar Shear Box Boundary Conditions

연성토조의 경계조건 변화에 따른 가속도 증폭 분석

Sugeun Jeong1
,
Yong Jin2
,
Kyungho Park3
,
Daehyeon Kim4*
정 수근1
,
김 용2
,
박 경호3
,
김 대현4*
1Master Student, Department of Civil Engineering, Choun University
2Ph.D. Student, Department of Civil Engineering, Choun University
3Assistant Professor, Department of Civil Construction Engineering, Chosun College of Science and Technology
4Professor, Department of Civil Engineering, Chosun University
1조선대학교 토목공학과 석사과정
2조선대학교 토목공학과 박사과정
3조선이공대학교 토목건설과 조교수
4조선대학교 토목공학과 교수
*Corresponding Author
31 March 2022. pp. 143-155
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Abstract

In this study, the response acceleration amplification according to different conditions was analyzed by changing the boundary condition of the soil called LSB (Laminar Shear Box), which is placed on a 1 g shaking table for earthquake simulation experiments. Experiments were carried out with different boundary conditions by fixing both sides of the LSB, and two samples were tested by installing an accelerometer at the same location. In addition, using DEEPSOIL v7 program, a one-dimensional ground response analysis was performed to compare and analyze with the free field condition. As a result, it was confirmed that the acceleration was amplified as it went from the lower layer to the upper layer, and as a result of comparing it with the ground response analysis, it was confirmed that it appeared similar to the analysis under the free field condition. As a result of the SA (Spectrum acceleration) analysis, a result similar to that of the ground response analysis was obtained, and in the case of fixing, it was confirmed that the PSA (Peak Spectral Acceleration) was further amplified.

Keywords
1 g shaking table
LSB
boundary condition
response acceleration
one-dimensional ground response analysis

본 연구에서는 지진 모사실험을 진행하는 1 g 진동대 실험에 올라가는 연성토조(Laminar Shear Box, LSB)라고 하는 토조의 경계조건(Boundary effect)을 달리하여 다른 조건에 따른 응답가속도 증폭에 대한 분석하였다. LSB의 양 옆을 고정하여 경계조건을 달리하여 실험을 진행하였고, 가속도계를 각 동일한 위치에 설치하여 2가지 시료에 대하여 실험을 진행하였다. 또한, DEEPSOIL v7 프로그램을 이용하여 1차원 지반응답해석을 통하여 자유장 조건에서와 비교 분석하였다. 그 결과 가속도가 하층부에서 상층부로 올라갈수록 증폭하는 모습을 확인할 수 있었고, 지반응답해석과 비교한 결과, 자유장 조건에서 해석과 비슷하게 나오는 것을 확인할 수 있었다. SA분석결과, 지반응답해석과 유사한 결과를 얻을 수 있었으며, 고정한 경우는 PSA가 더욱 증폭하는 결과를 확인할 수 있었다.

키워드
1 g 진동대 실험
연성토조
경계조건
응답가속도
1차원 지반응답 해석
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 32
  • No :1
  • Pages :143-155
  • Received Date : 2022-01-25
  • Revised Date : 2022-03-08
  • Accepted Date : 2022-03-16
  • DOI :https://doi.org/10.9720/kseg.2022.1.143
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