Ambient Vibration Testing of a Large Truss Bridge with Optimal Sensor Placement
This paper describes the modal identification of long span continuous truss bridge by per forming an ambient vibration test in successive setups.Triaxial wireless sensors are used for effi ciency, fast deployment and mobility without interference to traffic.Excitations are from ambient sources and the acquired data are treated using the reference-based, covariance-driven stochastic subspace system identification method.The results show a comprehensive modal set with a lot of identified modes, many of them being connected to the ones obtained from a finite element analysis.The original test design is then reviewed by applying an optimal sensor location algorithm.It shows that the test design based on intuition and experience is actually very close to the one obtained by optimal sensor placement scheme.Moreover, interesting features reveal, such as, to which extent the number of reference sensors can be reduced to speed up the test without compromising the num ber and the quality of the identified modes and to move roving sensors efficiently.
bridge engineering ambient vibration test operational modal analysis optimal sensor placement stochastic subspace identification wireless technology structural health monitoring
T.T.Bui E.Reynders G.Lombaert G.De Roeck
Department of Civil Engineering, KU Leuven, Belgium ; Section of Bridge and Tunnel Engineering, the Department of Civil Engineering, KU Leuven, Belgium
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
15-30
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）