In the seismic evaluation of underground utility tunnels, selecting an analytical method is critical to estimating reasonable seismic responses. In simplified pseudo-static analysis methods widely applied to typical seismic design and evaluation of underground tunnels in practice, it is essential to check whether the methods provide valid results for cut-and-cover tunnels buried in shallow to medium depth. The differences between the two simplified pseudo-static methods are discussed in this study, and the analysis results are compared to those obtained from FLAC models. In addition to the analysis methods, seismic site classification, overburden soil depth, and sectional configuration are considered variables to examine their effects on the seismic response of underground utility tunnels. Based on the analysis results, the characteristics derived from the concepts and details of each simplified model are discussed. Also, general observations are made for the application of simplified analysis methods.

1. 서 론
2. 단순화 해석 방법
3. 지진 해석 개요
    3.1 지반 모델 및 지진 시나리오
    3.2 대상 구조물
    3.3 적용 하중
4. 지진 해석에 따른 변위 응답 평가
    4.1 단순화 해석 검증을 위한 FLAC 모델 개요
    4.2 상대 횡변위 응답 평가
5. 지진 해석에 따른 부재력 응답 평가
    5.1 단면 련수의 영향
    5.2 지반의 영향
    5.3 심도의 영향
    5.4 해석모델의 영향
6. 결 론
감사의 글
REFERENCES

• 이혜린(서울대학교 건축학과 BK조교수) | Lee Hyerin (BK Assistant Professor, Department of Architecture and Architectural Engineering, Seoul National University) Corresponding author
• 서현정(케이아이티밸리 책임연구원) | Seo Hyun-Jeong (Senior Research Engineer, Department of Research Planning Division, KIT Valley Inc.)
• 임영우(해밀이앤씨 선임연구원) | Lim Youngwoo (Senior Researcher, R&D Center, Haemil EnC Inc.)
• 김대환(Nabih Youssef & Associates 부사장) | Kim Dae-Hwan (Vice President, Nabih Youssef & Associates)