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2021 Vol.37, Issue 8 Preview Page
Seismic Behaviour of Eco-BELT System and Seismic Effectiveness of T-shaped Deadman Considering Soil-Structure Interface Based on Dynamic Numerical Analysis

흙-구조물 접촉면을 고려한 친환경 옹벽 구조물의 지진시 거동 및 T형 후방지지물의 보강효과에 대한 동해석 분석연구

Chang-Won Kwak1
,
Inn-Joon Park2*
곽 창원1
,
박 인준2*
1Member, Assistant Prof., Dept. of Civil & Environmental Engrg., Inha Technical College
2Member, Prof., Dept. of Infrastructure & Systems, Hanseo Univ.
1정회원, 인하공업전문대학 토목환경과 조교수
2정회원, 한서대학교 인프라시스템학과 교수
*Corresponding Author
31 August 2021. pp. 37-49
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Abstract

A retaining wall system is widely constructed civil structure to maximize the effectiveness of practical use of the land. Recently, the technology which is more eco-friendly and owns seismic stability of the retaining wall system becomes important. In this study, an Eco-BELT system using natural rocks as the front wall is introduced and the seismic characteristics of the Eco-BELT system are analyzed based on 2 and 3 dimensional numerical analysis. The soil-structure interface comprises between backfill soil and natural rocks are considered. The relative density is mainly considered to influence the seismic behavior of Eco-BELT system, and T-shaped deadman is also considered to judge the increase of seismic stability. As a result, lateral displacement of the wall decreases 29.5% in maximum under 90% of relative density and decreases 21.2 to 21.9% with T-shaped deadman, therefore, the seismic effectiveness of T-shaped deadman and increasing relative density of backfill are verified by numerical analysis.

Keywords
Eco-BELT system
Interface
Numerical analysis
Seismic stability
T-shaped deadman

옹벽은 절, 성토부가 포함된 토지의 효율적 이용을 위하여 설치하는 대표적인 옹벽 구조물이다. 과거 국토개발 시기에는 시공성, 구조적 안정성 및 경제성에 치중하였다면, 최근에는 친환경적이고 내진 안정성을 갖춘 옹벽기술 개발의 필요성이 증대되고 있는 실정이다. 본 연구에서는 자연석을 활용한 친환경적 옹벽 구조물(Eco-BELT)을 제시하고 지진 시 동적 거동특성을 2, 3차원 수치해석을 이용하여 분석하였다. 자연석과 배면 뒤채움 흙 사이에 형성되는 접촉면을 고려하여 수치해석에 적용하였으며 동적거동에 영향을 미치는 주요 변수로서 뒤채움재의 다짐도를 기준으로 다짐도 증가에 따른 동적거동을 분석하고 T형 후방지지물의 유무에 따른 내진성능 향상을 수치해석적으로 검토하였다. 그 결과 다짐도 증가 시 옹벽 수평변위가 최대 29.5% 감소하여 다짐도 증가에 따른 내진안정성 증대효과를 확인하고 T형 후방지지물 설치 시 최대 수평변위는 약 21.2∼21.9%가 감소하는 것으로 산출되어 지진하중 재하 시 T형 후방지지물의 보강효과를 확인하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 37
  • No :8
  • Pages :37-49
  • Received Date : 2021-07-22
  • Revised Date : 2021-08-12
  • Accepted Date : 2021-08-13
  • DOI :https://doi.org/10.7843/kgs.2021.37.8.37
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