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A Study on the Development of a Seismic Response Monitoring System for Cable Bridges by Using Accelerometers

가속도계를 이용한 사장교의 지진거동 계측시스템 개발에 대한 연구

  • Jeong, Seong-Hoon (Department of Architectural Engineering, Inha University) ;
  • Jang, Won-Seok (Department of Architectural Engineering, Inha University) ;
  • Shin, Soobong (Department of Civil Engineering, Inha University)
  • 정성훈 (인하대학교 건축공학과) ;
  • 장원석 (인하대학교 건축공학과) ;
  • 신수봉 (인하대학교 사회기반시스템공학부)
  • Received : 2021.10.01
  • Accepted : 2021.10.23
  • Published : 2021.11.01

Abstract

In this study, a structural health monitoring system for cable-stayed bridges is developed. In the system, condition assessment of the structure is performed based on measured records from seismic accelerometers. Response indices are defined to monitor structural safety and serviceability and derived from the measured acceleration data. The derivation process of the indices is structured to follow the transformation from the raw data to the outcome. The process includes noise filtering, baseline correction, numerical integration, and calculation of relative differences. The system is packed as a condition assessment program, which consists of four major processes of the structural health evaluation: (i) format conversion of the raw data, (ii) noise filtering, (iii) generation of response indices, and (iv) condition evaluation. An example set of limit states is presented to evaluate the structural condition of the test-bed and cable-stayed bridge.

Keywords

Acknowledgement

이 논문은 국토교통부 건설기술연구사업의 연구비지원(21SCIP-B146946-04)에 의해 수행되었습니다.

References

  1. Center for Engineering Strong Motion Data[Internet]. U.S. Geological Survey & California Geological Survey; [Citied 2021 Oct]; Available from: https://www.strongmotioncenter.org/
  2. Science & Technology Policy Institute. Research of the mid-long termed optimization of national integrated seismic network and its operational institutionalization. Research Report, Korea Meteorological Administration. c2006.
  3. Ministry of the Interior and Safety. Guideline for Installation and Management of Seismic Acceleration Measurement System. Enforcement Rule[2010-30]. Republic of Korea. c2010.
  4. Kim KS, You DW. Introduction of Long Span Bridge Management Center, Journal of Disaster Prevention. 2016;18(1):63-75.
  5. Current Long Span Bridge Monitoring&Measurement System [Internet]. Korea Infrastructure Safety & Technology Corporation; 2021 [Citied 2021 Oct]; Available from: https://www.kalis.or.kr/wpge/m_458/business/busi1003.do
  6. Korea Infrastructure Safety & Technology Corporation. Disaster reponse manual for long span bridge management center. Operation Guideline, Republic of Korea. c2015.
  7. Kim SK, Ahn SS, Park MS, Kim TY, Park HG, Kim, DS. The Central Integration Development of Bridge Health Monitoring System. Research Report, Korea Expressway Corp. Highway Research Center. c1999.
  8. Celik OC, Ellingwood BR. Seismic risk assessment of gravity load designed reinforced concrete frames subjected to Mid-America ground motions. Journal of Structural Engineering, ASCE. 2009;135(4):414-424. https://doi.org/10.1061/(asce)0733-9445(2009)135:4(414)
  9. Katsuchi H. Yamada H. Kusuhara S. Structural Monitoring and Design Verification of Akashi Kaikyo Bridge Proceedings of the 11th International Conference on Engineering. Science, Construction, and Operations in Challenging Environments. 2008;1-8.
  10. Ministry of the Interior and Safety. Guideline for Installation and Management of Seismic Acceleration Measurement System. Enforcement Rule[2020-26]. Republic of Korea. c2020.
  11. Ministry of the Interior and Safety. Earthquake and Volcanic Disaster Countermeasures Act:Enforcement Rules. Enforcement Rule[Ordinance No. 183 of the KMIS]. Republic of Korea. c2021.
  12. Nakamura Y. A Method for Dynamic Characteristics Estimation of Subsurface using Microtremor on the Ground Surface. Quarterly Report of RTRI. 1989;30(1):25-33.
  13. National Disaster Management Institute. Development of the Public Buildings Emergency Integrity Assessment Technology using Seismic Acceleration Response Signal. Research Report, Republic of Korea. c2012.
  14. Shimada T. Estimating method of cable tension from natural frequency of high mode. Proceeding of Japan Society of Civil Engineers. 1994;501(1-29):163-171.
  15. Brigham EO. The Fast Fourier Transform and Its Application. Prentice Hall: Englewood Cliffs, NJ, USA. c1998.
  16. Ljung L. System Identification: Theory for the User. Prentice Hall: Englewood Cliffs, NJ, USA. c1997.