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Pounding analysis of RC bridge considering spatial variability of ground motion
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  • Journal title : Earthquakes and Structures
  • Volume 9, Issue 5,  2015, pp.1029-1044
  • Publisher : Techno-Press
  • DOI : 10.12989/eas.2015.9.5.1029
 Title & Authors
Pounding analysis of RC bridge considering spatial variability of ground motion
Han, Qiang; Dong, Huihui; Du, Xiuli; Zhou, Yulong;
To investigate the seismic pounding response of long-span bridges with high-piers under strong ground motions, shaking table tests were performed on a 1/10-scaled bridge model consisting of three continuous spans with rigid frames and one simply-supported span. The seismic pounding responses of this bridge model under different earthquake excitations including the uniform excitation and the traveling wave excitations were experimentally studied. The influence of dampers to the seismic pounding effects at the expansion joints was analyzed through nonlinear dynamic analyses in this research. The seismic pounding effects obtained from numerical analyses of the bridge model are in favorable agreement with the experimental results. Seismic pounding effect of bridge superstructures is dependent on the structural dynamic properties of the adjacent spans and characteristics of ground motions. Moreover, supplemental damping can effectively mitigate pounding effects of the bridge superstructures, and reduce the base shear forces of the bridge piers.
seismic pounding;isolation device;traveling wave excitation;shaking table test;nonlinear analysis;
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