Structural Engineering and Mechanics

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Simulation of vibrations of Ting Kau Bridge due to vehicular loading from measurements

  • Au, F.T.K. (Department of Civil Engineering, The University of Hong Kong) ;
  • Lou, P. (Department of Civil Engineering, The University of Hong Kong) ;
  • Li, J. (Department of Civil Engineering, The University of Hong Kong) ;
  • Jiang, R.J. (Department of Civil Engineering, The University of Hong Kong) ;
  • Zhang, J. (Department of Civil Engineering, The University of Hong Kong) ;
  • Leung, C.C.Y. (Department of Civil Engineering, The University of Hong Kong) ;
  • Lee, P.K.K. (Department of Civil Engineering, The University of Hong Kong) ;
  • Lee, J.H. (Department of Civil Engineering, The University of Hong Kong) ;
  • Wong, K.Y. (Bridges and Structures Division, Highways Department, The Government of the Hong Kong Special Administrative Region) ;
  • Chan, H.Y. (Bridges and Structures Division, Highways Department, The Government of the Hong Kong Special Administrative Region)
  • Received : 2010.12.15
  • Accepted : 2011.08.18
  • Published : 2011.11.25
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Abstract

The Ting Kau Bridge in Hong Kong is a cable-stayed bridge comprising two main spans and two side spans. The bridge deck is supported by three towers, an end pier and an abutment. Each of the three towers consists of a single reinforced concrete mast strengthened by transverse cables and struts. The bridge deck is supported by four inclined planes of cables emanating from anchorages at the tower tops. In view of the heavy traffic on the bridge, and threats from typhoons and earthquakes originated in areas nearby, the dynamic behaviour of long-span cable-supported bridges in the region is always an important consideration in their design. Baseline finite element models of various levels of sophistication have been built not only to match the bridge geometry and cable forces specified on the as-constructed drawings but also to be calibrated using the vibration measurement data captured by the Wind and Structural Health Monitoring System. This paper further describes the analysis of axle loading data, as well as the generation of random axle loads and simulation of vibrations of the bridge using the finite element models. Various factors affecting the vehicular loading on the bridge will also be examined.

Keywords

References

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