Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Field Application Analysis of Cable Tension Measuring Device on Cable-Stayed Bridges

사장교 케이블장력 계측장치의 현장적용성 분석

  • 이현철 (주식회사 구주엔지니어링)
  • Received : 2021.01.04
  • Accepted : 2021.04.02
  • Published : 2021.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, an experiment was carried out on the field applicability of tension measuring devices of the cables in cable-stayed bridges. The vibration method was used to estimate the tension of cables of cable-stayed bridge, and the mode characteristics of the cable were analyzed using a cable tension measuring device. GTDL360, NI Module, and 9 Axes Motion Sensorwere applied to estimate the cable tension of five target bridges. Numerical analysis of the five target bridges was conducted to analyze the natural frequency of the cable and cable tension. The estimated tension of the cable based on field measurements and estimated tension of cable by numerical analysis were compared with the estimated tension of the cable based on field measurements. The analysis showed that the measured tension of the cable based on field measurements was within the margin of error. Therefore, it is safe to apply these measuring devices to the site. As a result of comparing and analyzing the values of the acceleration-based cable estimation tension and numerical analysis of the field demonstration bridge, the acceleration-based cable estimation of tension is deemed appropriate within the allowable range. On-site applicability analysis revealed limitations of the measuring devices, such as the installation location of sensors and weather conditions, so continuous follow-up research on smart cable tension measuring systems is expected.

본 연구에서는 사장교 케이블에 대한 장력계측장치의 현장적용성에 대한 실험을 수행하였다. 사장교 케이블의 장력을 추정하기 위해서 진동법을 이용하였으며 대상교량에 대해서 케이블의 가진을 통해서 모드특성을 분석하였고 케이블의 장력을 추정하기 위한 계측장치로는 GTDL360, NI Module, 9 Axes Motion Sensor등을 적용하였고 5개의 대상교량에 대해서 상기 계측장치들을 이용하여 케이블의 모드특성을 분석하여 케이블장력측정실험의 적정성을 평가하고 케이블의 장력을 추정하였다. 또한 5개의 대상교량에 대해서 수치해석을 실시하여 케이블의 고유진동수 및 케이블장력을 해석하였다. 현장 계측결과에 의한 케이블의 추정장력과 수치해석에 의한 케이블의 추정장력을 비교하여 현장계측방법의 적정성을 판단하였으며 분석결과 현장 계측에 의한 케이블의 계측장력과 해석에 의한 추정장력은 오차범위내에 있어서 상기 계측장치들을 현장에 적용하여도 무방할 것으로 판단된다. 현장실증교량의 가속도 기반의 케이블 추정장력과 수치해석에 의한 해석장력과의 값을 비교분석한 결과 값이 허용범위 내로 가속도 기반의 케이블 추정장력값은 적정한 것으로 판단된다. 또한, 현장적용성 분석결과 센서의 설치위치 및 기상조건의 제한 등 계측장치의 한계점이 존재하므로 추후 케이블 스마트 장력계측시스템에 관한 지속적인 후속연구가 필요할 것으로 판단된다.

Keywords

References

  1. Korea Expressway Corporation, Final research report of general program for super long span bridge R&D Project, 2016. https://scienceon.kisti.re.kr/srch/selectPORSrchReport.do?cn=TRKO201700000193
  2. Korea Expressway Corporation, Technical Report for Special Bridges(Seo Hae, Young Jong and Bang Hwa Grand Bridges), 1998.
  3. Chlko, T. J., Haritos, N. and Gershkovich, V., "Non-linear curve fitting for modal analysis", Environmental Software, Vol.11, pp.9-18, 1996. DOI: https://doi.org/10.1016/S0266-9838(96)00016-0
  4. Cornwell, P., Farrar, C. R., Doebling, S. W. and Sohn H., "Environmental Variability of Modal Properties", Experimental Techniques, Vol.23, pp.45-48, 1999. DOI: http://dx.doi.org/10.1111/j.1747-1567.1999.tb01320.x
  5. Elliott, A. S. and Richardson, M. H., "Virtual Experimental Modal Analysis(VEMA)", Proceeding of 16th IMAC, 1998.
  6. Shwarz, B. and Richardson, M., "Modal Parameter estimation from ambient response data", Proceeding of 19th IMAC, 2001. https://www.semanticscholar.org/paper/MODAL-PARAMETER-ESTIMATION-FROM-AMBIENT-RESPONSE-Schwarz-Richardson/56d13c4e127087b272a946a2750b89f33c76ea59#paper-header
  7. Ja Geul Yun, Jin Son, Seung-Pi Jang, "A Study on Tension Measurement for Cable-Supported Bridge", Proc. of the KSCE Conf., KSCE, pp.117-120, 1999.
  8. T. Shimada, A Study on the Maintenance and Management of the Tension Measurment for the Cable of Bridge, Ph Dissertation, Kobe University, 1995.
  9. H. Zui, T. Shinke and Y. Namita, "Practical Formulas for Estimation of Cable Tension by Vibration Method", ASCE Journal of SE, Vol.122, No.6, pp.651-656, 1996. DOI: http://dx.doi.org/10.1061/(ASCE)0733-9445(1996)122:6(651)
  10. Nam-Sik Kim, Woon Jeong, "Evaluation of Tension Force of Stay Cables Using Vibration Method", Journal of the KSNVE, KSNVE, Vol.12, No.12, pp.956-963, 2002. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200211922274860 https://doi.org/10.5050/KSNVN.2002.12.12.956
  11. Lee, H.J., "Study on the Efficient Application of Vision-Based Displacement Measurements for the Cable Tension Estimation of Cable-Stayed Bridges", Journal of the Korea Academia-Industrial cooperation Society, Vol.17, No.9, pp.709-717,2016. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO201631261655438 https://doi.org/10.5762/KAIS.2016.17.9.709
  12. Korea Expressway Corporation, Development of Monitoring-Based Maintenance System for Cable-Supported Bridges, 2011.
  13. Park, Y.S., Choi, S.M., Lee, B.G., Kim, N.J., "Estimation of Stay Cable Tension Using String Vibration Theory", Journal of the Korea Society of Hazard Mitigation, Vol.9, No.2, pp.17-22, 2009. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200916762902305
  14. Lee, H.C., Kwon, K.M., Moon, C.Y., Jo, Y.H., "Measurement Equipment Development of Stability Evaluation for Joint Slope using Unmaned Aerial Vehicle", TUNNEL & UNDERGROUND SPACE, Vol.28, No.3, pp.193-208, 2018. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO201820540192141 https://doi.org/10.7474/TUS.2018.28.3.193
  15. ABSignal, ModalVIEW - Operating Tutorial Version R2, pp.1-199, 2012. https://www.absignal.com
  16. Jenny Lau, Jeroen Lanslots, Bart Peeters, Herman Van derAuweraer., Automatic modal analysis: reality or myths, 2007. http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.150.236
  17. Jeong-In Shin., Damage Detection In Braced Steel Frame using Modal Analysis, 2017. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=DIKO0014383551
  18. Kim, B.H., Park, M.S., Lee, I.K., "Modal Parameter Extraction of Seohae Cable-stayed Bridge : I. Mode Shape", KSCE Journal of Civil and Environmental Engineering Research, Vol.28, No.5A, pp.631-639, 2008. https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200830265652213
  19. Seoul City, Han River Bridge Online Safety Maintenance System Report, 2012. http://hbsafety25.eseoul.go.kr/open_content/system/introduce.html