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2025 Vol.41, Issue 6 Preview Page
Comparison of Ground Response Characteristics of Liquefiable Soils in the Pohang Area Using 1D and 2D Numerical Analyses

1D 및 2D 수치해석을 통한 포항 지역 액상화 가능 지반의 지반응답 특성 비교

Jun-Seong Moon1
,
Jin-Man Kim2*
,
Su-Won Son3
,
Jong-Chan Yoon4
,
Yun-Ho Park5
,
Jeong-Won Seo6
문 준성1
,
김 진만2*
,
손 수원3
,
윤 종찬4
,
박 윤호5
,
서 정원6
1Member, Graduate Student, Dept. of Civil and Environmental Engineering, Pusan National Univ.
2Member, Prof., Dept. of Civil and Environmental Engineering, Pusan National Univ.
3Member, Associate Prof., Dept. of Architectural and Civil Engineering, Kyungil Univ.
4Member, Postdoctoral Researcher, Division of Sustainable Engineering, Major in Civil Engineering, Pukyong National Univ.
5Graduate Student, Dept. of Civil and Environmental Engineering, Pusan National Univ.
6Graduate Student, Dept. of Civil and Environmental Engineering, Pusan National Univ.
1정회원, 부산대학교 사회환경시스템공학과 석사과정
2정회원, 부산대학교 사회환경시스템공학과 정교수
3정회원, 경일대학교 건축토목공학과 조교수
4정회원, 부경대학교 지속가능공학부 토목공학전공 박사후 연구원
5비회원, 부산대학교 사회환경시스템공학과 석사과정
6비회원, 부산대학교 사회환경시스템공학과 석사과정
*Corresponding Author
31 December 2025. pp. 141-153
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Abstract

This study performed one-dimensional (1D) and two-dimensional (2D) ground response analyses for liquefaction-affected sites in the Pohang area using SHAKE2000, DEEPSOIL, and PLAXIS 2D. Cyclic stress ratio (CSR), cyclic resistance ratio (CRR), and liquefaction safety factor (FS = CRR/CSR) were calculated and compared to evaluate differences among the analysis methods. SHAKE2000, which is based on an equivalent linear approach, produced the most conservative results. DEEPSOIL, using a nonlinear hysteretic model, generally yielded less conservative estimates. In contrast, PLAXIS 2D realistically reproduced liquefaction behavior by directly considering undrained response and confinement-dependent stress changes. A comparison between SPT-based and Vs-based CRR evaluations showed that the Vs-based approach exhibited better agreement with observed damage patterns, indicating its suitability for liquefaction assessment in mixed sandy soils.

Keywords
Cyclic Resistance Ratio (CRR)
Cyclic Stress Ratio (CSR)
DEEPSOIL
Liquefaction
PLAXIS 2D
Pohang Earthquake
SHAKE2000

본 연구에서는 2017년 포항지진 피해지역을 대상으로 SHAKE2000, DEEPSOIL, PLAXIS 2D를 이용한 1차원 및 2차원 지반응답해석을 수행하였다. 동일한 입력 조건하에서 반복전단응력비(CSR), 반복저항응력비(CRR), 및 액상화 안전율(FS = CRR/CSR)을 산정하여 해석기법별 차이를 비교·분석하였다. SHAKE2000은 등가선형 해석으로 가장 보수적인 결과를, DEEPSOIL은 비선형 이력모델을 통해 비보수적인 경향을 보였다. 반면 PLAXIS 2D는 비배수 거동과 구속압 변화를 직접 고려하여 가장 현실적인 액상화 거동을 재현하였다. 또한 SPT 및 Vs 기반 CRR 산정 결과를 비교한 결과, Vs 기반 평가는 실제 피해구간과의 부합도가 높아 복합 사질토 지반의 액상화 평가에 더 적합한 것으로 판단된다.

References
1

Ahn, J.K., Cho, S.H., Jeon, Y.S., and Lee, D. K. (2018), “Response Characteristics of Site-specific Using Aftershock Event”, Journal of the Korean Geotechnical Society, Vol.34, No.8, pp.51-64, https://doi.org/10.7843/kgs.2018.34.8.51.

10.7843/kgs.2018.34.8.51
2

Andrus, R. D. and Stokoe, K. H. (2000), “Liquefaction Resistance of Soils from Shear-Wave Velocity”, J. of Geotechnical and Geoenvironmental Engineering, ASCE, Vol.126, No.11, pp.1015-1025, https://doi.org/10.1061/(ASCE)1090-0241(2000)126:11(1015).

10.1061/(ASCE)1090-0241(2000)126:11(1015)
3

Bentley Systems (2023), PLAXIS 2D 2024.1: Reference manual (2D). https://www.bentley.com/.

4

Boulanger, R. W. and Idriss, I. M. (2014), “CPT and SPT based Liquefaction Triggering Procedures”, Center for Geotechnical Modeling Department of Civil and Environmental Engineering University of California Davis, California.

5

Byrne, P. M., Park, S. S., Beaty, M., Sharp, M., Gonzalz, L., and Abdoun, T. (2004), “Numerical Modeling of Liquefaction and Comparison with Centrifuge Tests”, Canadian Geotechnical J., Vol.41, No.2, pp.193-211, https://doi.org/10.1139/t03-088.

10.1139/t03-088
6

Darendeli, M. B. (2001), Development of a New Family of Normalized Modulus Reduction and Material Damping Curves, The University of Texas at Austin, Austin, TX, USA.

7

Hashash, Y. M. A. (2024), DEEPSOIL 7.1: A Nonlinear and Equivalent Linear Seismic Site Response of 1-D Soil Columns, User Manual, Board of Trustees of the University of Illinois at Urbana-Champaign, https://deepsoil.cee.illinois.edu/.

8

Idriss, I. M. and Boulanger, R. W. (2008), Soil Liquefaction during Earthquakes, Earthquake Engineering Research Institute, California.

9

Ji, H.Y., Choi, D.S., and Kim, J.H. (2021), “Conversion of Recorded Ground Motion to Virtual Ground Motion Compatible to Design Response Spectra”, Journal of the Earthquake Engineering Society of Korea, Vol.25, No.1, pp.33-42, https://doi.org/10.5000/EESK.2021.25.1.033.

10.5000/EESK.2021.25.1.033
10

Kayen, R., Moss, R. E. S., Thompson, E. M., Seed, R. B., Cetin, K. O., Der Kiureghian, A., Tanaka, Y., and Tokimatsu, K. (2013), “Shear-Wave Velocity-Based Probabilistic and Deterministic Assessment of Seismic Soil Liquefaction Potential”, J. of Geotechnical and Geoenvironmental Engineering, ASCE, Vol.139, No.3, pp.407-419, https://doi.org/10.1061/(ASCE)GT.1943-5606.0000743.

10.1061/(ASCE)GT.1943-5606.0000743
11

Kim, J.K., Kwak, T.Y., Han, J.T., Hwang, B.Y., and Kim, K.S. (2020), “Evaluation of Dynamic Ground Properties of Pohang Area Based on In-situ and Laboratory Test”, Journal of the Korean Geotechnical Society, Vol.36, No.9, pp.5-20, https://doi.org/10.7843/kgs.2020.36.9.5.

10.7843/kgs.2020.36.9.5
12

Kim, Y.J., Ko, K.W., Kim, B.M., Park, D.H., Kim, K.S., Han, J.T., and Kim, D.S. (2020), “Evaluation of Liquefaction Triggering for the Pohang Area based on SPT and CPT Tests”, Journal of the Korean Geotechnical Society, Vol.36, No.10, pp.57-71, https://doi.org/10.7843/kgs.2020.36.10.57.

10.7843/kgs.2020.36.10.57
13

Ministry of Land, Infrastructure and Transport (2024), KDS 17 10 00: General Provisions for Seismic Design.

14

National Disaster Management Research Institute (2017), The investigated result of liquefaction due to Pohang earthquake. Korea.

15

Ordóñez, G. A. (2018), SHAKE2000: A Computer Program for the 1-D Analysis of Geotechnical Earthquake Engineering Problems — Quick tutorial. GeoMotions, LLC.

16

Park, S. S., Kim, Y. S., Byrne, P. M., and Kim, D. M. (2005), “A Simple Constitutive Model for Soil Liquefaction Analysis”, Journal of the Korean Geotechnical Society, Vol.21, No.8, pp.27-35.

17

Seed, H. B. and Idriss, I. M. (1970), “Soil Moduli and Damping Factors for Dynamic Response Analyses”, Report No. EERC 70-10, University of California, Berkeley, CA.

18

Seed, H. B. and Idriss, I. M. (1971), “Simplified Procedure for Evaluating Soil Liquefaction Potential”, J. of the Soil Mechanics and Foundations Division, ASCE, Vol.97, No.9, pp.1249-1273, https://doi.org/10.1061/JSFEAQ.0001662.

10.1061/JSFEAQ.0001662
19

Vucetic, M. and Dobry, R. (1991), “Effect of Soil Plasticity on Cyclic Response”, J. of Geotechnical Engineering, ASCE, Vol.117, No.1, pp.89-107, https://doi.org/10.1061/(ASCE)0733-9410(1991)117:1(89).

10.1061/(ASCE)0733-9410(1991)117:1(89)
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 41
  • No :6
  • Pages :141-153
  • Received Date : 2025-11-12
  • Revised Date : 2025-12-03
  • Accepted Date : 2025-12-04
  • DOI :https://doi.org/10.7843/kgs.2025.41.6.141
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