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2025 Vol.27, Issue 2 Preview Page

Research Paper

Numerical analysis study on damage assessment of duct slabs under vehicle explosion scenarios in tunnel

터널 내 차량폭발 상황에서 풍도 슬래브 손상도 평가를 위한 수치해석적 연구

Dae-Won Lee1
,
Jung-Gyu Kim2
,
Sunghyun Lee3
,
Tae Kyun Kim4
,
Han-Eol Kim5
,
Wan-Kyu Yoo6
,
Chang-Yong Kim7
,
Min-Seong Kim8*
이 대원1
,
김 정규2
,
이 성현3
,
김 태균4
,
김 한얼5
,
유 완규6
,
김 창용7
,
김 민성8*
1Master Student, Dept. of Energy and Resources Engineering, Chonnam National University
2Academic Research Professor, Industrial Technology Research Institute, Chonnam National University
3Manager, Research Institute, Hong G Co., Ltd.
4CEO, Hong G Co., Ltd.
5Postdoctoral Researcher, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
6Senior Researcher, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
7Senior Research Fellow, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
8Assistant Professor, Dept. of Energy and Resources Engineering, Chonnam National University
1정회원, 전남대학교 에너지자원공학과 석사과정
2정회원, 전남대학교 공업기술연구소 학술연구교수
3비회원, (주)홍지 기술연구소 과장
4정회원, (주)홍지 대표이사
5정회원, 한국건설기술연구원 지반연구본부 박사후연구원
6정회원, 한국건설기술연구원 지반연구본부 수석연구원
7정회원, 한국건설기술연구원 지반연구본부 선임연구위원
8정회원, 전남대학교 에너지자원공학과 조교수
*Corresponding Author
31 March 2025. pp. 101-114
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Abstract

This study employed numerical analysis techniques to evaluate the damage characteristics of duct slabs under vehicle explosion scenarios within tunnels. The analysis was conducted using the ANSYS LS-DYNA program, applying the Arbitrary Lagrangian-Eulerian (ALE) method, the Riedel-Hiermaier-Thoma (RHT) material model, and the Jones-Wilkins-Lee (JWL) equation of state to assess the damage characteristics of duct slabs caused by vehicle explosions. Theoretical TNT equivalent for the five vehicle types was calculated to model the explosion impact, and the damage mechanisms and damage indices of duct slabs were analyzed. Additionally, structural damage levels and stability were comprehensively evaluated to identify the impact of explosions for each vehicle type. The results showed significant variations in explosion impact and slab damage depending on vehicle type and TNT equivalent. Notably, slab damage exhibited a nonlinear increase with larger explosion magnitudes. These findings provide essential data for establishing blast-resistant design criteria and improving the structural safety of duct slab systems in tunnels. This study offers a novel numerical approach to evaluating structural protection performance under explosion scenarios in tunnels and is anticipated to contribute to advancements in explosion-resistant design.

Keywords
Blast analysis
Tunnel duct slabs
TNT equivalent
Blast resistance performance
Damage assessment

본 연구는 터널 내에서 발생할 수 있는 차량 폭발 상황을 가정하여, 풍도 슬래브 존재 시 차량 폭발에 따른 슬래브 손상도를 평가하기 위해 수치해석적 기법을 활용하였다. 터널 내 폭발 상황을 해석하기 위해 ANSYS LS-DYNA 프로그램을 활용하였으며, Arbitrary Lagrangian-Eulerian (ALE) 기법과 Riedel-Hiermaier-Thoma (RHT) 재료 모델, Jones-Wilkins-Lee (JWL) 상태방정식 등을 적용하여 차량 폭발에 따른 풍도 슬래브의 손상 특성을 평가하였다. 폭발 규모 산정을 위해 총 5가지 차종 분류에 따른 이론적 TNT 등가량을 산정하였으며, 이를 기반으로 폭발 충격을 모델링하였고, 터널 풍도 슬래브의 손상 메커니즘과 손상도를 분석하였다. 또한, 슬래브 손상도와 구조적 안정성을 종합적으로 평가하여 폭발로 인한 구조물 피해를 각 차량 유형별로 확인하였다. 해석 결과, 폭발 충격량과 슬래브 손상도는 차량 유형 및 TNT 등가량에 따라 큰 차이를 보였으며, 특히 슬래브 손상도는 차량 폭발 규모에 따라 비선형적으로 증가하는 경향을 확인하였다. 이러한 결과는 터널 풍도 슬래브 구조물의 방폭 설계 기준 수립 및 구조적 안전성 향상을 위한 기초 자료로 활용될 수 있다. 본 연구는 터널 내 폭발 상황에 대한 수치해석적 접근을 통해 구조물 방호 성능 평가의 새로운 방향을 제시하며, 향후 폭발 방호 설계의 발전에 기여할 것으로 기대된다.

키워드
폭발해석
터널 풍도 슬래브
TNT 등가량
방폭 성능
손상도 평가
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 27
  • No :2
  • Pages :101-114
  • Received Date : 2025-01-16
  • Revised Date : 2025-03-10
  • Accepted Date : 2025-03-17
  • DOI :https://doi.org/10.9711/KTAJ.2025.27.2.101
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