Earthquakes and Structures

  • 제23권6호
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  • Pages.517-526
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  • 2022
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Centrifuge shaking table tests on a friction pendulum bearing isolated structure with a pile foundation in soft soil

  • Shu-Sheng, Qu (Tianjin Research Institute for Water Transport Engineering, Ministry of Transport of the People's Republic of China) ;
  • Yu, Chen (School of Transportation Science and Engineering, Civil Aviation University of China) ;
  • Yang, Lv (Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University)
  • 투고 : 2022.06.15
  • 심사 : 2022.12.05
  • 발행 : 2022.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Previous studies have shown that pile-soil interactions have significant influences on the isolation efficiency of an isolated structure. However, most of the existing tests were carried out using a 1-g shaking table, which cannot reproduce the soil stresses resulting in distortion of the simulated pile-soil interactions. In this study, a centrifuge shaking table modelling of the seismic responses of a friction pendulum bearing isolated structure with a pile foundation under earthquakes were conducted. The pile foundation structure was designed and constructed with a scale factor of 1:100. Two layers of the foundation soil, i.e., the bottom layer was made of plaster and the upper layer was normal soil, were carefully prepared to meet the similitude requirement. Seismic responses, including strains, displacement, acceleration, and soil pressure were collected. The settlement of the soil, sliding of the isolator, dynamic amplification factor and bending moment of the piles were analysed to reveal the influence of the soil structure interaction on the seismic performance of the structure. It is found that the soil rotates significantly under earthquake motions and the peak rotation is about 0.021 degree under 24.0 g motions. The isolator cannot return to the initial position after the tests because of the unrecoverable deformation of the soil and the friction between the curved surface of the slider and the concave plate.

키워드

과제정보

The authors gratefully acknowledge the support for this research from the National Natural Science Foundation of China under grant No. 52178295.

참고문헌

  1. AASHTO (2014), Guide Specifications for Seismic Isolation Design, Washington, DC.
  2. Farghaly, A.A. and Kontoni, D.P.N. (2022), "Mitigation of seismic pounding between RC twin high-rise buildings with piled raft foundation considering SSI", Earthq. Struct., 22(6), 625-635. https://doi.org/10.12989/eas.2022.22.6.625.
  3. Bai, J., Chen, H., Zhao, J., Liu, M., and Jin, S. (2021), "Seismic design and subassemblage tests of buckling-restrained braced RC frames with shear connector gusset connections", Eng. Struct., 234, 112018. https://doi.org/10.1016/j.engstruct.2021.112018.
  4. Bandyopadhyay, S., Parulekar, Y.M., Sengupta, A. and Chattopadhyay, J. (2021), "Structure soil structure interaction of conventional and base-isolated building subjected to real earthquake", Struct., 32, 474-493. https://doi.org/10.1016/j.istruc.2021.03.069.
  5. Constantina, P. and Petros, K. (2020), "Peak seismic response of a symmetric base-isolated steel building: Near vs. far fault excitations and varying incident angle", Earthq. Struct., 18(3), 349-365. https://doi.org/10.12989/eas.2020.18.3.349.
  6. Kontoni, D.P.N and Farghaly, A.A. (2019), "The effect of base isolation and tuned mass dampers on the seismic response of RC high-rise buildings considering soil-structure interaction", Earthq. Struct., 17(4), 425-434. https://doi.org/10.12989/eas.2019.17.4.425.
  7. Fan, F.G. and Ahmadi, G. (1992), "Seismic responses of secondary systems in base-isolated structures", Eng. Struct., 14(1), 35-48. https://doi.org/10.1016/0141-0296(92)90006-C.
  8. Fujita, T., Fujita, S., Tazaki, S., Yoshizawa, T. and Suzuki, S. (1990), "Research, development and implementation of rubber bearings for seismic isolation", JSME Int. J., 33(3), 394-403. https://doi.org/10.1299/jsmec1988.33.394.
  9. GB 50011-2010 (2016), Code for Seismic Design of Buildings, China Architecture & Building Press, Beijing.
  10. Juhn, G., Manolis, G.D., Constantinou, M.C. and Reinhorn, A.M. (1992), "Experimental study of secondary systems in baseisolated structure", J. Struct. Eng., 118(8), 2204-2221. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:8(2204).
  11. Kelly, J.M. (1990), "Base isolation: Linear theory and design", Earthq. Spectra, 6(2), 223-244. https://doi.org/10.1193/1.1585566.
  12. Liu, W.G. (2006), Recommendation for the Design of Base Isolated Buildings, Sesmological Press, Beijing.
  13. Luco, J.E. (2014), "Effects of soil-structure interaction on seismic base isolation", Soil Dyn. Earthq. Eng., 66, 167-177. https://doi.org/10.1016/j.soildyn.2014.05.007.
  14. Han, M., Wang, Y., Du, H., Chu, X., Cui, M. and Meng, L. (2021), "Base-isolated steel structure with spring limiters under nearfault earthquakes: Experiment", Earthq. Struct., 21(3), 239-250. https://doi.org/10.12989/eas.2021.21.3.239.
  15. Mylonakis, G. and Gazetas, G. (2000), "Seismic soil-structure interaction: Beneficial or detrimental?", J. Earthq. Eng., 4(3), 277-301. https://doi.org/10.1080/13632460009350372.
  16. Han, Q., Dong, H.H., Du, X.L. and Zhou, Y.L. (2015), "Pounding analysis of RC bridge considering spatial variability of ground motion", Earthq. Struct., 9(5), 1029-1044. https://doi.org/10.12989/eas.2015.9.5.1029.
  17. Panchal, V.R. and Jangid, R.S. (2009), "Seismic response of structures with variable friction pendulum system", J. Earthq. Eng., 13(2), 193-216. https://doi.org/10.1080/13632460802597786.
  18. Radkia, S., Rahnavard, R., Tuwair, H., Gandomkar, F.A. and Napolitano, R. (2020), "Investigating the effects of seismic isolators on steel asymmetric structures considering soilstructure interaction", Struct., 27, 1029-1040. https://doi.org/10.1016/j.istruc.2020.07.019.
  19. Sabnis, G.M., Harris, H.G., White, R.N., Mirza, M.S. and Klingner, R.E. (1983), "Structural modeling and experimental techniques", J. Dyn. Sys., Meas. Control, 105(4), 307. https://doi.org/10.1115/1.3140679.
  20. Soni, D.P., Mistry, B.B., Jangid, R.S. and Panchal, V.R. (2011), "Seismic response of the double variable frequency pendulum isolator", Struct. Control Health Monit., 18(4), 450-470. https://doi.org/10.1002/stc.384.
  21. Spyrakos, C.C., Koutromanos, I.A. and Maniatakis, C.A. (2009), "Seismic response of base-isolated buildings including soilstructure interaction", Soil Dyn. Earthq. Eng., 29(4), 658-668. https://doi.org/10.1016/j.soildyn.2008.07.002.
  22. Spyrakos, C.C., Maniatakis, C.A. and Koutromanos, I.A. (2009), "Soil-structure interaction effects on base-isolated buildings founded on soil stratum", Eng. Struct., 31(3), 729-737. https://doi.org/10.1016/j.engstruct.2008.10.012.
  23. Yang, J., Lu, Z. and Li, P. (2020), "Large-scale shaking table test on tall buildings with viscous dampers considering pile-soilstructure interaction", Eng. Struct., 220, 110960. https://doi.org/10.1016/j.engstruct.2020.110960.
  24. Yan, Z., Chen, Y., Sun, X.P. and Zhang, H.Q. (2019), "Performance evaluation of an "m" shaped SCM wall in reinforcement of pile-supported wharf under yard heaped loads with centrifuge modelling", Eng. Struct., 193, 308-323. https://doi.org/10.1016/j.engstruct.2019.05.025.
  25. Zhuang, H.Y., Yu, X., Zhu, C., and Jin, D.D. (2014), "Shaking table tests for the seismic response of a base-isolated structure with the SSI effect", Soil Dyn. Earthq. Eng., 67, 208-218. https://doi.org/10.1016/j.soildyn.2014.09.013.
  26. Zhuang, H., Fu, J., Yu, X., Chen, S. and Cai, X. (2019), "Earthquake responses of a base-isolated structure on a multilayered soft soil foundation by using shaking table tests", Eng. Struct., 179, 79-91. https://doi.org/10.1016/j.engstruct.2018.10.060.