Extraction of Dynamical Features of Bridge Under Heavy Passing Vehicles

Authors

  • Wael Zatar College of IT and Engineering, Marshall University, Huntington, WV, USA.
  • Feng Xiao Department of Civil Engineering, Nanjing University of Science and Technology, Nanjing, China
  • Gang S. Chen College of IT and Engineering, Marshall University, Huntington, WV, USA.
  • J. Leroy Hulsey Department of Civil and Environmental Engr, University of Alaska Fairbanks, Fairbanks, AK, USA.

Keywords:

Bridge Dynamics, Bridge-Vehicle Interactions, Bridge Health Monitoring, Spectrum Analysis

Abstract

The dynamical system identification is critical to bridge model updating and structural health monitoring. The approach to detect bridge dynamical properties from the acceleration responses of bridge under moving vehicle has been widely recognized, but its implementations have many difficulties as the response of bridge under moving vehicle contains various components making it difficult to be used as reliable index. Based on field testing, this paper experimentally investigated vehicle bridge interaction problem with new strategy utilizing several heavy load vehicles. The dynamical properties of bridge are extracted from the response of bridge under moving vehicles. The results shown that the response spectrum is time-varying and has complicated patterns of mode coupling, which is quietly different from the theoretical estimation based on conventional vehicle-bridge interaction model and many published testing results. It offers certain insight to the understanding of dynamical spectrum signatures of vehicle bridge interactions and its applications to structure health monitoring.

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Published

2019-06-14