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To investigate dynamic responses of the continuous girder bridge under strong seism, a 1:3 two span reduced-scale model of continuous girder bridge with different bearing types was designed and tested. The earthquake shaking table array tests were taken on the model bridge under different inputs of ground motions from Landers, Cerro Prieto, El Centro and Chi-Chi earthquake waves which represented four different sites. The results show that acceleration response of side pier is larger than that of middle pier under short period earthquake wave, and acceleration response of middle pier is larger than that of side pier under large period earthquake wave. Seismic responses under bi-direction excitations of the model are larger than those under single-direction excitations. Transverse seismic response of continuous girder bridge under multi-direction excitation should be paid more attentions. Bent seismic response raises noticeably as the intensity of the input wave raises. The relative displacement peak value between the main girder and bent is larger than their absolute displacement peak difference. High damping rubber bearings (HRB) have relatively significant damping effect on side piers after seismic isolation and reduce the risk of falling-off of the girder. The study could be served as the basis of dynamic response analysis of continuous bridges under strong earthquake, and also as a reference of the seismic design and collapse control design of the same type of reinforced concrete continuous bridges. © 2016, Editorial Department of China Journal of Highway and Transport. All right reserved.
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China Journal of Highway and Transport
ISSN: 1001-7372
CN: 61-1313/U
Year: 2016
Issue: 6
Volume: 29
Page: 232-242
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WoS CC Cited Count: 0
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 5
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