Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Analysis of seismic behaviors of digging well foundation with prefabricated roots

  • Wang, Yi (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Chen, Xingchong (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Zhang, Xiyin (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Ding, Mingbo (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Gao, Jianqiang (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Lu, Jinhua (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Zhang, Yongliang (School of Civil Engineering, Lanzhou Jiaotong University)
  • Received : 2021.03.25
  • Accepted : 2021.07.21
  • Published : 2021.12.25
⟨ Previous Next ⟩

Abstract

Digging well foundation has been widely used in railway bridges due to its good economy and reliability. In other instances, bridges with digging well foundation still have damage risks during earthquakes. In this study, a new type of digging well foundation with prefabricated roots was proposed to reduce earthquake damage of these bridges. Quasi-static tests were conducted to investigate the failure mechanism of the root digging well foundation, and then to analyze seismic behaviors of the new type well foundation. The testing results indicated that these prefabricated roots could effectively limit the rotation and uplift of the digging well foundation and increase the lateral bearing capacity of the digging well foundation. The elastic critical load and ultimate load can be increased by 69% and 36% if prefabricated roots were added in the digging well foundation. The prefabricated roots drived more soil around the foundation to participate in working, the stiffness of the bridge pier with root digging well foundation was improved. Moreover, the root participation could improve the energy dissipation capacity of soil-foundation-pier interaction system. The conclusions obtained in this paper had important guiding significance for the popularization and application of the digging well foundation with prefabricated roots in earthquake-prone zones.

Keywords

Acknowledgement

This research is supported by the National Natural Science Foundation of China (Grants No. 51968039, 51768036), Young Elite Scientist Sponsorship Program by CAST (for Xiyin Zhang, No. YESS20200278), Science and Technology Program of Gansu Province for Distinguished Young Scholars (No. 20JR5RA430), Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University (Xiyin Zhang), and lzjtu (201801) EP support. On behalf of all authors, the corresponding author states that there is no conflict of interest.

References

  1. Baraldi, D. and Tullini, N. (2020), "Static stiffness of rigid foundation resting on elastic half-space using a Galerkin boundary element method", Eng. Struct., 225, 1-14. https://doi.org/10.1016/j.engstruct.2020.111061.
  2. Chiou, J.S., Ko, Y.Y., Hsu, S.Y. and Tsai, Y.C. (2012), "Testing and analysis of a laterally loaded bridge caisson foundation in gravel", Soil. Found., 52(3), 562-573. https://doi.org/10.1016/j.sandf.2012.05.013.
  3. Chowdhury, I., Tarafdar, R., Ghosh, A. and Dasgupta, S.P. (2017), "Dynamic soil structure interaction of bridge piers supported on well foundation", Soil Dyn. Earthq. Eng., 97, 251-265. https://doi.org/10.1016/j.soildyn.2017.03.005.
  4. Gaudio, D. and Rampello, S. (2019a), "The influence of soil plasticity on the seismic performance of bridge piers on caisson foundations", Soil Dyn. Earthq. Eng., 118, 120-133. https://doi.org/10.1016/j.soildyn.2018.12.007.
  5. Gaudio, D. and Rampello, S. (2020b), "Equivalent seismic coefficients for caisson foundations supporting bridge piers", Soil Dyn. Earthq. Eng., 129, 1-14. https://doi.org/10.1016/j.soildyn.2019.105955.
  6. Gong, W.M., Yang, C., Dai, G.L. and Yin, Y.G. (2018), "In-situ test on vertical compressive bearing characteristic of rooted caisson with grouting at caisson side", J. Build. Struct., 39(5), 164-173. https://doi.org/10.14006/j.jzjgxb.2018.05.021.
  7. Gerolymos, N. and Gazetas, G. (2006), "Winkler model for lateral response of rigid caisson foundations in linear soil", Soil Dyn. Earthq. Eng., 26(5), 347-361. https://doi.org/10.1016/j.soildyn.2017.11.016.
  8. GB/T 50123 (2019), Standard for Geotechnical Testing Method, Ministry of Housing and Urban-Rural Development of the People's Republic of China, Beijing, China.
  9. GB/T 50081 (2019), Standard for Test Methods of Concrete Physical and Mechanical Properties, Ministry of Housing and Urban-Rural Development of the People's Republic of China, Beijing, China.
  10. GB/T 228.1 (2010), Metallic Materials-Tensile Testing-Part 1: Method of Test at Room Temperature, General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Beijing, China.
  11. Hu, F., Gong, W.M., Tong, X.D., Yin, Y.G. and Shan, J. (2010), "Analysis of bearing capacity of root-caisson with flexual roots", Chin. J. Comput. Mech., 27(3), 505-510.
  12. Huang, M.S., Zhang, C.R., Mu, L.L. and Gong, W.M. (2011), "Analysis of anchor foundation with root caissons loaded in nonhomogeneous soils", Can. Geotech. J., 48(2), 234-246. https://doi.org/10.1139/T10-046.
  13. Hu, X.Q., Cai, Y.Q., Wang, J. and Ding, G.Y. (2010), "Rocking vibrations of a rigid embedded foundation in a poroelastic soil layer", Soil Dyn. Earthq. Eng., 30(4), 280-284. https://doi.org/10.1016/j.soildyn.2009.09.007.
  14. JGJ/T 101 (2015), Specification for Seismic Test of Buildings, Ministry of Housing and Urban-Rural Development of the People's Republic of China, Beijing, China.
  15. Li, T. (1997), "Design method of dug well foundation of bridge in loess area", Chin. J. Geotech. Eng., 19(3), 47-54.
  16. Lu, J.H., Chen, X.C., Ding, M.B., Zhang, X.Y., Liu, Z.N. and Yuan, H. (2019), "Experimental and numerical investigation of the seismic performance of railway piers with increasing longitudinal steel in plastic hinge area", Earthq. Struct., 17(6), 545-556. https://doi.org/10.12989/eas.2019.17.6.545.
  17. Senjuntichai, T., Mani, S. and Rajapakse, R. (2006), "Vertical vibration of an embedded rigid foundation in a poroelastic soil", Soil Dyn. Earthq. Eng., 26(6), 626-636. https://doi.org/10.1016/j.soildyn.2006.01.013.
  18. Shi, J.Y. (2020), "A systematic modeling approach for layered soil considering horizontal and rotational foundation vibrations", Comput. Struct., 239, 1-20. https://doi.org/10.1016/j.compstruc.2020.106336.
  19. Sonin, A.A. (2004), "A generalization of the Π-theorem and dimensional analysis", Proc. Nat. Acad. Sci. US Am., 101(23), 8525-8526. https://doi.org/10.1073/pnas.0402931101.
  20. TB 10077 (2019), Code for Rock and Soil Classification of Railway Engineering, National Railway Administration of the People's Republic of China, Beijing, China.
  21. Zafeirakos, A. and Gerolymos, N. (2014), "Towards a seismic capacity design of caisson foundations supporting bridge piers", Soil Dyn. Earthq. Eng., 67, 179-197. https://doi.org/10.1016/j.soildyn.2014.09.002.
  22. Zheng, C.J., He, R., Kouretzis, G. and Ding, X.M. (2019), "Horizontal vibration of a cylindrical rigid foundation embedded in poroelastic half-space", Comput. Geotech., 106, 296-303. https://doi.org/10.1016/j.compgeo.2018.11.009.
  23. Zhou, S.X. and Li, X.F. (2019), "Interfacial debonding of an orthotropic half-plane bonded to a rigid foundation", Int. J. Solid. Struct., 161, 1-10. https://doi.org/10.1016/j.ijsolstr.2018.11.003.
  24. Zhu, G.Y. and Lee, V.W. (2018), "Three-dimensional (3D) soil structure interaction with normal-plane P-wave incidence: Rigid foundation", Soil Dyn. Earthq. Eng., 105, 11-21. https://doi.org/10.1016/j.soildyn.2017.11.016.