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Original Article

A Case Study on Seismic Analysis of a Cable-Stayed Bridge Considering Soil-Structure Interaction

지반-구조물 상호작용을 고려한 사장교의 내진해석 사례 연구

방기정1ㆍ김성겸2*

Ki-Jung Bang1, Seong-Kyum Kim2*

1Ph.D. Student, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
2Associate Professor, School of Architecture, Civil and Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
31 March 2026. pp. 62-70
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Abstract
Purpose: This study quantitatively investigates the influence of soil–structure interaction (SSI) on the seismic response characteristics of bridge structures during seismic design. Method: A cable-stayed bridge was selected as a case study to evaluate these effects through a two-stage analytical approach. In the first stage, site-specific free-field ground motions were obtained using the SHAKE91 program, from which the nonlinear dynamic properties of the subsurface soil were derived. the second stage, SSI analysis was conducted using the substructure method implemented in the SASSI program. Result: Impedance analyses were performed to estimate equivalent spring stiffness values for the pylon foundation, which were then integrated into the structural model. The seismic response results indicated that incorporating SSI effects led to variations in member forces of up to approximately 1% compared to those under fixed-base assumptions. Conclusion: These discrepancies are attributed to the dynamic interaction between the ground and the superstructure. The findings highlight the necessity of considering SSI effects in the seismic analysis and design of critical bridge structures to ensure improved structural reliability and seismic safety.
Keywords
Soil-Structure Interaction
Seismic Analysis
Equivalent Spring Stiffness
SASSI
Cable-Stayed Bridge
연구목적: 본 연구는 교량구조물의 내진설계시 지반-구조물 상호작용의 고려 여부가 구조물의 지진응답특성에 미치는 영향을 정량적으로 분석하기 위한 사례연구이다. 연구방법: 본 연구에서는 SHAKE91프로그램을 이용하여 구조물이 설치될 부지의 자유장 운동을 산정하고 지반의 비선형 거동을 반영한 동적 물성치를 산정하였다. 이후 SASSI 프로그램을 이용하여 부분구조법 기반의 지반-구조물 상호작용 해석을 수행하였다. 연구결과: 임피던스 해석을 통해 주탑 기초의 등가 스프링 강성을 추정하였으며 지반-구조물 상호작용 결과는 SSI 효과를 고려한 경우와 고려하지 않은 경우 부재력이 1% 수준으로 변동하는 것으로 나타났습니다. 결론: 지반 및 구조물의 동적 상호작용에 기인하는 것으로 내진 해석시 지반-구조물 상호작용효과를 정량적으로 평가하여 구조적 신뢰성과 내진 안전성을 향상시키기 위해 주요 교량 구조물의 내진 해석 및 설계 시 SSI 효과를 고려해야 함을 확인하였다.
키워드
지반-구조믈 상호작용
내진해석
등가 스프링강성 SASSI
사장교
References
  1. Boulkhiout, Y. (2019). “Dimensionless impedance functions of rigid circular foundations on elastic half-space.” Innovative Infrastructure Solutions, Vol. 4, No. 1, pp. 17-28.
  2. Computers and Structures, Inc. (2021). SAP2000 Integrated Finite Element Analysis and Design of Structures. Berkeley, California.
  3. Dhar, S., Dasgupta, K. (2019). “Seismic soil structure interaction for integral abutment bridges: A review.” Transportation Infrastructure Geotechnology, Vol. 6, pp. 249-267. 10.1007/s40515-019-00081-y
  4. Dicleli, M. (2005). “Integral abutment-backfill behavior on sand soil—Pushover analysis approach.” Journal of Bridge Engineering, Vol. 10, No. 3, pp. 354-364. 10.1061/(ASCE)1084-0702(2005)10:3(354)
  5. Dicleli, M., Albhaisi, S., Mansour, M.Y. (2005). “Static Soil–Structure interaction effects in seismic-isolated bridges.” Practice Periodical on Structural Design and Construction, Vol. 10, No. 1, pp. 22-33. 10.1061/(ASCE)1084-0680(2005)10:1(22)
  6. Federal Highway Administration (FHWA). (2011). LRFD Seismic Analysis and Design of Transportation Geotechnical Features and Structural Foundations. Publication No. FHWA-NHI-11-032, GEC No. 3, Washington, DC.
  7. Federal Highway Administration (FHWA). (2014). LRFD Bridge Design Specifications. FHWA, 7th Edition, Washington, DC.
  8. Firoozi, A.A., Naji, M., Firoozi, A.A. (2023). “Effects of soil–structure interaction on performance of bridges during earthquakes. Case study: Integral Abutment Bridge in Pennsylvania, USA.” Iranian Journal of Science and Technology, Transactions of Civil Engineering, Vol. 47, pp. 3487-3505. 10.1007/s40996-023-01122-w
  9. Francisco, P., Rodrigo, A., Ramiro, B., Francisco, H., Nibaldo, N. (2024). “Probabilistic seismic assessment of multispan RC highway bridges considering soil-structure interaction and chloride-induced corrosion.” Engineering Structures, Vol. 301, 117257. 10.1016/j.engstruct.2023.117257
  10. Gazetas, G. (1991). “Formulas and charts for impedances of surface and embedded foundations.” Journal of Geotechnical Engineering, ASCE, Vol. 117, No. 9, pp. 1363-1381. 10.1061/(ASCE)0733-9410(1991)117:9(1363)
  11. Lam, I.P., Law, H. (2000). Soil Structure Interaction of Bridges for Seismic Analysis. Multidisciplinary Center for Earthquake Engineering Research, University at Buffalo. MCEER-00-0008, Federal Highway Administration, Washington, DC.
  12. Mylonakis, G., Gazetas, G. (2000). “Seismic soil-structure interaction: Beneficial or detrimental.” Journal of Earthquake Engineering, Vol. 4, No. 3, pp. 277-301. 10.1080/13632460009350372
  13. Saadeghvaziri, M.A., Foutch, D.A. (2000). “Dynamic soil–structure interaction effects on the longitudinal seismic response of existing bridges.” Engineering Structures, Vol. 22, No. 3, pp. 313-322.
  14. Shi, X., Song, L.L., Guo, T., Pan, Z.H. (2022). “Seismic design of self-centering bridge piers considering soil-structure interaction.” Structures, Vol. 43, pp. 1819-1833. 10.1016/j.istruc.2022.07.055
  15. Soyluk, K., Sicacik, E.A. (2012). “Soil–structure interaction analysis of cable-stayed bridges for spatially varying ground motion components.” Soil Dynamics and Earthquake Engineering, Vol. 35, pp. 80-90. 10.1016/j.soildyn.2011.11.003
  16. Stewart, J.P., Bielak, J., and Dobry, R. (2017). “Soil–structure interaction in buildings and bridges: State of practice.” Earthquake Spectra, Vol. 33, No. 2, pp. 707-741.
  17. Sun, L., Xie, W. (2019). “Evaluation of pile-soil-structure interaction effects on the seismic responses of a super long-span cable-stayed bridge in the transverse direction: A shaking table investigation.” Soil Dynamics and Earthquake Engineering, Vol. 125, 105755. 10.1016/j.soildyn.2019.105755
  18. Tileylioglu, S., Stewart, J.P., Nigbor, R.L. (2010). “Dynamic stiffness and damping of a shallow foundationfrom forced vibration of a field test structure.” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 137, No. 4, pp. 344-353. 10.1061/(ASCE)GT.1943-5606.0000430
  19. Zhang, Z., Wei, H., Qin, X. (2017). “Experimental study on damping characteristics of soil-structure interaction system based on shaking table test.” Soil Dynamics and Earthquake Engineering, Vol. 98, pp. 183-190. 10.1016/j.soildyn.2017.04.002
Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 22
  • No :1
  • Pages :62-70
  • DOI :https://doi.org/10.15683/kosdi.2026.3.31.062
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