Abstract:In order to study sesimis response of Y-shape bridge under the earthquake, based on a existing Y-shape bridge, a scale 1/20 model of Y-shaped curved bridge was constructed, the El-centro waves was using to make a shaking table test with different earthquake intensity and multi-dimensional excitation. Besides, the finite element analysis were also been conducted for this model bridge. And the Research results show that when the earthquake intensity enhancing, the fundamental frequency of model bridge decreased greatly and the damping ratio increased. The longitudinal acceleration response of pier’s top has no influence with the vertical earthquake excitation. The horizontal direction earthquake excitation can meet with calculating the strain response at the bottom of the pier. When the vertical acceleration response of mid span, expansion joint width between main beam and branch beam and pounding response of expansion joint are analysed, all of them have relationship with seismic wave input dimension. Therefore, Y-shaped bridges should be whether conducted multi-dimensional excition or not in seismic design according to different design purpose.
闫磊,李青宁,尹俊红,韩春,程麦理. 多维地震激励下人字形桥梁地震模拟振动台试验研究[J]. 振动与冲击, 2016, 35(7): 167-176.
Yan lei, Li Qing-ning, Yin Jun-hong, Han chun,Cheng Mai-li,. Shaking table test of Y-shaped bridge under multi-dimensional excitation. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(7): 167-176.
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