KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Structural Performance Evaluation of Anchors for Power Equipment Electrical Cabinets Considering On-Site Installation Conditions

현장 설치 조건을 고려한 발전설비 전기 캐비닛 정착부 앵커의 구조성능 평가

  • 이상문 (강릉원주대학교 스마트 인프라 연구소) ;
  • 정우영 (강릉원주대학교 건설환경공학과)
  • Received : 2023.08.21
  • Accepted : 2023.09.11
  • Published : 2023.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In general, most of the electrical equipment responsible for control within power plants is housed in self-standing cabinets. These cabinets are typically fixed to a slab using post-installed anchors. Although the fixation method of using post-installed anchors provides stability, there is a risk of conductor failure due to external forces, including moments. However, the performance assessment of current anchors is only evaluated through uniaxial material tests. Therefore, the primary purpose of this study is to compare the static performance of post-installed anchors, considering on-site installation conditions, with their performance in material tests and to analyze the behavioral characteristics of the anchors. While conducting experiments using actual cabinets would be ideal, practical and spatial constraints make this approach difficult. As an alternative, experiments were conducted using a test specimen consisting of a steel column and a support. As a result, the pull-out performance of anchors reflecting on-site installation conditions was measured to be about 10% higher than that observed in material tests. The trends in load reduction and the point of maximum performance for the anchors also differed. To verify the reliability of the experimental study, a 3D FEM analysis was performed, which will provide predictive information on the loads transferred to the post-installed anchors for structural performance evaluations of electrical cabinets using shaking table test in the future.

일반적으로 발전소 내 제어를 담당하는 대부분의 전기 설비는 자립식 캐비닛으로, 후설치 앵커를 사용하여 슬래브에 고정하는 정착 방식이 주로 사용된다. 정착부 앵커의 경우 외력이 작용될 시 모멘트 하중 등에 의한 전도의 위험성에 노출되지만 현행 앵커에 대한 성능 검토는 1축 재료 시험으로만 평가되고 있다. 따라서 본 연구는 현장 설치 조건이 반영된 후설치 앵커의 정적 성능 실험을 통하여 재료 시험과의 성능을 비교하고 앵커의 거동 특성을 분석하는 것이 주목적이다. 실제 캐비닛을 이용하여 실험을 진행하는 것이 타당하지만 경제적, 공간적 제약으로 수행하기에 어려움이 있어 강재 기둥과 받침으로 구성된 실험체로 대체하여 수행하였다. 결과적으로 현장 설치 조건을 반영한 앵커의 인발 성능이 재료 시험 대비 약 10 % 높게 측정되었으며, 앵커의 하중 감소 경향 및 최대 성능이 발현되는 시점도 상이한 것으로 나타났다. 한편, 실험적 연구의 신뢰성을 검증하기 위하여 3D FEM 해석을 수행하였으며, 이를 통해 향후 진동대를 이용한 전기 캐비닛의 구조 성능 평가 시 후설치 앵커에 전달되는 예측 가능한 하중 정보를 제공하고자 한다.

Keywords

Acknowledgement

This present work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A1A03044326 and 2022R1A6A3A01086071).

References

  1. Architectural Institute of Korea (AIK) (2016). Korean building code - structural, Ministry of Land, Infrastructure, and Transport Notice No. 2016-317. 
  2. ASTM International (2003). Standard test methods for strength of anchors in concrete and masonry elements, ASTM E 488-96. 
  3. Bang, J. S., Youn, I., Kwon, Y. and Yim, H. J. (2020). "Nonlinear tensile behavior analysis of torque-controlled expansion anchors using finite element analysis." Journal of the Korea Institute for Structural Maintenance and Inspection, KSMI, Vol. 24, No. 4, pp. 91-99, http://doi.org/10.11112/jksmi.2020.24.4.91 (in Korean). 
  4. Barnett, R. L. (2020). "Overturning file cabinet." American Journal of Mechanical Engineering, SciEP, Vol. 8, No. 1, pp. 26-39, https://doi.org/10.12691/ajme-8-1-4. 
  5. Eem, S. H., Jeon, B. G., Jang, S. J. and Choi, I. K. (2019). "Evaluate the characteristics of vibration caused by rocking modes of electric cabinet under seismic loading." Transactions of the Korean Society for Noise and Vibration Engineering, KSNVE, Vol. 29, No. 6, pp. 735-744, https://doi.org/10.5050/KSNVE.2019.29.6.735 (in Korean). 
  6. Hur, J. (2012). Seismic performance evaluation of switchboard cabinets using nonlinear numerical mode, Ph.D. Dissertation, Georgia Institute of Technology, Atlanta, USA. 
  7. Kim, M. K. (2020). Dynamic performance evaluation of post-anchor installed in power plant, Msc. Thesis, Gangneung-Wonju National University (in Korean). 
  8. Lee, J. and Fenves, G. L. (1998). "Plastic-damage model for cyclic loading of concrete structures." Journal of Engineering Mechanics, ASCE, Vol. 124, No. 8, pp. 892-900, https://doi.org/10.1061/(ASCE)0733-9399(1998)124:8(892). 
  9. Lee, S. M. and Jung, W. Y. (2020). "Evaluation of anchorage performance of the switchboard cabinet under seismic loading condition." Advances in Mechanical Engineering, Vol. 12, No. 5, https://doi.org/10.1177/1687814020926309. 
  10. Lee, S. M. and Jung, W. Y. (2022). "A study on the load characteristics of the anchorage according to the natural frequency change of the electric cabinet in a power plant." Advances in Mechanical Engineering, Sage, Vol. 14, No. 9, pp. 1-11, https://doi.org/10.1177/16878132221123676. 
  11. Lee, N. H. and Park, K. R. (2005). "Qualification of post-installed mechanical anchors in concrete." Magazine of the Korea Concrete Institute, KCI, Vol. 17, No. 5, pp. 21-28 (in Korean). 
  12. Lim, J. E. and Lee, J. H. (2009). "Nonlinear analysis of cyclically loaded concrete-steel structures using an anchor bond-slip model." KSCE Journal of Civil and Environmental Engineering Research, KSCE, Vol. 29, No. 5A, pp. 495-501 (in Korean). 
  13. Lubliner, J., Oliver, J., Oller, S. and Onate, E. (1989). "A plastic-damage model for concrete." International Journal of Solids and Structures, Elsevier, Vol. 25, No. 3, pp. 299-326, https://doi.org/10.1016/0020-7683(89)90050-4. 
  14. Perry, C., Phipps, M. and Hortacsu, A. (2009). "Reducing the risks of nonstructural earthquake damage." Proceedings of ATC and SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures, ASCE, San Francisco, USA, pp. 674-685. https://doi.org/10.1061/41084(364)62. 
  15. Shaheen, M. A., Tsavdaridis, K. D. and Salem, E. (2017). "Effect of grout properties on shear strength of column base connections: FEA and analytical approach." Engineering Structures, Elsevier, Vol. 152, pp. 307-319, https://doi.org/10.1016/j.engstruct.2017.08.065. 
  16. Suth, R. and Yoo, S. W. (2014). "An experimental study on pullout characteristics of post-installed set anchor for concrete under edge distance, anchor interval and concrete strength." Journal of the Korea Academia-Industrial Cooperation Society, KAIS, Vol. 15, No. 4, pp. 2469-2475, http://dx.doi.org/10.5762/KAIS.2014.15.4.2469 (in Korean). 
  17. Yun, D. W., Jeon, B. G., Jung, W. Y., Chang, S. J. and Shin, Y. J. (2019). "Analysis of anchorage behavior characteristics of the electrical cabinet using shaking table tests." Transactions of the Korean Society for Noise and Vibration Engineering, KSNVE, Vol. 29, No. 1, pp. 43-50, https://doi.org/10.5050/KSNVE.2019.29.1.043 (in Korean).