Earthquakes and Structures

  • 제21권6호
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  • Pages.641-652
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  • 2021
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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)
  • 투고 : 2021.03.25
  • 심사 : 2021.07.21
  • 발행 : 2021.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

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.

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