Abstract
In earthquakes propagating seismic waves will arrive at adjacent supports at different time instants. Consequently, the ground motion will not excite all bridge components at the same time, but with a time delay. Since the soil development along the bridge is never uniform, the propagating waves will be altered by the different soil properties along the wave path. The bridge will therefore experience spatially non-uniform ground excitation with a coherency loss. The research focuses on the consequence of this non-uniform ground excitation for the response of a bridge structure. The abutment, bridge pier and adjacent abutment were excited by three separate large shake tables, respectively. The influence of the spatial variation of ground motions and the girder-abutment pounding on the seismic response is presented.
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Acknowledgements
The authors would like to thank the Ministry of Business, Innovation, and Employment for the support of this research through the Natural Hazards Research Platform under the Award 3708936. The authors also would like to extend their gratitude to China Scholarship Council for supporting the doctoral research of the first author at the University of Auckland.
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Yang, Z., Kun, C., Chouw, N. (2020). Impact of Spatial Variation of Ground Motions on the Seismic Performance of a Bridge Structure. In: Wang, C., Ho, J., Kitipornchai, S. (eds) ACMSM25. Lecture Notes in Civil Engineering, vol 37. Springer, Singapore. https://doi.org/10.1007/978-981-13-7603-0_95
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DOI: https://doi.org/10.1007/978-981-13-7603-0_95
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