Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Numerical Analysis of Foundation Reinforcing Method using Load Transfer Apparatus

하중전이 장치를 이용한 기초보강공법의 수치해석적 연구

  • Received : 2021.10.22
  • Accepted : 2021.12.02
  • Published : 2021.12.20
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Abstract

In this study, a numerical analysis using a three-dimensional numerical simulation was performed to assess the applicability of foundation reinforcing method using load transfer apparatus which can be used in the remodeling of deteriorated structures. The numerical model was validated through comparison with the real scale experimental results, and then a parametric study was performed to investigate the effect of friction coefficient of load transfer apparatus and axial stiffness of pile on the performance of foundation reinforcing method. It was confirmed that the foundation reinforcing method considered in this study can efficiently control the load applied to an existing foundation.

본 연구에서는 공동주택의 리모델링 시 기초보강공법의 하나인 하중전이 장치를 이용한 기초보강공법에 대해 3차원 유한요소 수치해석 연구를 수행하였다. 실대형 현장실험을 통해 수치모형을 검증하였고, 매개변수 해석을 통해 하중전이장치의 마찰계수, 말뚝의 축강성이 기초보강공법의 성능에 미치는 영향을 확인하였다. 그 결과 하중전이 장치를 이용한 기초보강공법은 보강 중, 보강 후에도 기존 말뚝에 작용하는 하중을 자유롭게 조절가능함을 확인하였다.

Keywords

Acknowledgement

This research was funded by a grant(21RERP-B099826-07) from the Residential Environment Research Program(RERP), which is funded by the Ministry of Land, Infrastructure and Transport of the Korean government.

References

  1. Housing Act Article 2(25). Sejong (Korea): Korea Ministry of Land, Infrastructure and Transport; 2021.
  2. Park YS. Issue Focus - A Study on the Prospect and Policy Tasks of the Korean Building Renovation Market [Internet]. Seoul (Korea): Construction & Economy Research Institute of Korea; 2020 Set 17. Available from: http://www.cerik.re.kr/eng/report/issue/detail/2417
  3. Enforcement Decree of Housing Act. Sejong (Korea): Korea Ministry of Land, Infrastructure and Transport; 2018.
  4. Structural Standards for Condominium Remodeling with Vertical Extension. Sejong (Korea): Korea Ministry of Land, Infrastructure and Transport; 2021.
  5. Kim DH, Jeong SS, Cho HC. Estimation of the axial stiffness of reinforcing piles in vertical extension structures. Journal of the Korea Geotechnical Society. 2019 Dec;35(12):35-44. https://doi.org/10.7843/kgs.2019.35.12.35
  6. Wang CC, Han JT, Jang YE, Ha IS, Kim SJ. Study on the effectiveness of preloading method on reinforcement of the pile foundation by 3D FEM analysis. Journal of the Korea Geotechnical Society. 2018 Jan;34(1):47-57. https://doi.org/10.7843/kgs.2018.34.1.47
  7. Wang CC, Han JT, Jang YE. Investigation of effectiveness of preloading method for existing foundation underpinning by centrifuge tests. Geotechnics for Sustainable Infrastructure Development. Lecture Notes in Civil Engineering. 2019 Nov;62: 61-7. https://doi.org/10.1007/978-981-15-2184-3_7
  8. Wang CC, Han JT, Kim SJ, Jang YE. A novel preloading method for foundation underpinning for the remodeling of an existing building. Geomechanics and Engineering. 2021 Jan;24(1):29-42. https://doi.org/10.12989/gae.2021.24.1.029
  9. You YC, Choi KS, Lee HJ, Jeon JS, inventors; Load transfer apparatus using brace-type supports and horizontal tensioning device, and foundation strengthening method therewith. Korea Patent KR 1021737980000. 2020 Oct 28.
  10. Jeong SS, Cho HC. A study on the load distribution ratio and axial stiffness on existing and reinforcing-pile in vertical extension remodeling. Journal of the Korea Geotechnical Society. 2019 Jan;35(1):17-30. https://doi.org/10.7843/kgs.2019.35.1.17
  11. Kim SJ, Wang CC, Han JT. Analysis of load distribution behavior in vertical extension remodeling from stiffness of existing and reinforcing pile by load test. Journal of the Korea Geotechnical Society. 2020 Aug;36(8):61-72. https://doi.org/10.7843/kgs.2020.36.8.61