Abstract
In violent earthquakes, ground motion is considered to change dramatically in the process of spatial propagation. Strong spatially varying exists in ground motion near fault area, and it can cause the large-span and large stiffness structure to be damaged. In this paper, a typical long-span steel box arch bridge is selected as an engineering case. In order to simulate the spatial variation of near fault ground motion accurately, the records that sampled in former earthquake are used as ground motion input. The shaking table experiment and finite element analysis are used as analysis means. Through the analysis of the internal force and displacement response of the key position of the arch rib, it is found that the spatially varying in the near fault ground motion can bring severe seismic response. If the spatially varying is ignored, the damage of the bridge will be seriously underestimated.
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Acknowledgements
This work is supported by the National Natural Science Foundation Key Project of China (No. 51178080) and Doctoral Research Initiation Fund of Shandong Technology and Business University (No. BS201931). The author would like to thank the Pacific Earthquake Engineering Research (PEER) Center for the earthquake data.
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Liu, Z., Zhang, S. Influence of strong spatially varying near fault ground motion on steel box arch bridge. Bull Earthquake Eng 19, 5439–5469 (2021). https://doi.org/10.1007/s10518-021-01182-1
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DOI: https://doi.org/10.1007/s10518-021-01182-1