지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.20 No.2
- 발행연도
- 2017.1
- 수록면
- 197 - 205 (9page)
이용수
초록· 키워드
오류제보하기
The dynamic performance of railway bridges under high-speed trains draws the attention of bridge engineers. The vibration issue for long-span bridges under high-speed trains is still not well understood due to lack of validations through structural health monitoring (SHM) data. This paper investigates the correlation between bridge acceleration and train speed based on structural dynamics theory and SHM system from three foci. Firstly, the calculated formula of acceleration response under a series of moving load is deduced for the situation that train length is near the length of the bridge span, the correlation between train speed and acceleration amplitude is analyzed. Secondly, the correlation scatterplots of the speed–acceleration is presented and discussed based on the transverse and vertical acceleration response data of Dashengguan Yangtze River Bridge SHM system. Thirdly, the warning indexes of the bridge performance for correlation scatterplots of speed–acceleration are established. The main conclusions are: (1) The resonance between trains and the bridge is unlikely to happen for long-span bridge, but a multimodal correlation curve between train speed and acceleration amplitude exists after the resonance speed; (2) Based on SHM data, multimodal correlation scatterplots of speed–acceleration exist and they have similar trends with the calculated formula; (3) An envelope line of polylines can be used as early warning indicators of the changes of bridge performance due to the changes of slope of envelope line and peak speed of amplitude. This work also gives several suggestions which lay a foundation for the better design, maintenance and long-term monitoring of a long-span high-speed bridge.
목차
등록된 정보가 없습니다.
참고문헌 (34)
참고문헌 신청
AREMA / 2007 / Manual for Railway Engineering / The American Railway Engineering and Maintenance of Way Association (AREMA)
Ashebo, D. B. / 2007 / Evaluation of dynamic loads on a skew box girder continuous bridge part I : Field test and modal analysis / Eng. Struct 29(6):1052~1063
Dehestani, M. / 2009 / Investigation of critical influential speed for moving mass problems on beams / Appl. Math. Model 33(10):3885~3895
Dinh, V. N. / 2009 / Dynamic analysis of three-dimensional bridge–high-speed train interactions using a wheel–rail contact model / Eng. Struct 31(12):3090~3106
Feng, D. M. / 2015 / Model updating of railway bridge using in situ dynamic displacement measurement under trainloads / J. Bridge Eng. -ASCE 20(12):04015019
Ashebo, D. B. / 2007 / Evaluation of dynamic loads on a skew box girder continuous bridge part I : Field test and modal analysis / Eng. Struct 29(6):1052~1063
Dehestani, M. / 2009 / Investigation of critical influential speed for moving mass problems on beams / Appl. Math. Model 33(10):3885~3895
Dinh, V. N. / 2009 / Dynamic analysis of three-dimensional bridge–high-speed train interactions using a wheel–rail contact model / Eng. Struct 31(12):3090~3106
Feng, D. M. / 2015 / Model updating of railway bridge using in situ dynamic displacement measurement under trainloads / J. Bridge Eng. -ASCE 20(12):04015019
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