Shaking table test of seismic performance of a simply-supported girder bridge with single column

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (16) : 49-55.

SHAO Changjiang1,2,QI Qiming1,WEI Wang1,HU Chenxu1,WANG Meng1, XIAO Laichuan1,XIAO Zhenghao1

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Abstract

Recently, lateral collapse and seismic disasters caught much attention.Many achievements on lateral stability sprung up in the last few years.However, the longitudinal seismic properties of a single-column bridge are still unsolved.Thus, a scaled model of a single-span reinforced concrete bridge was designed using the current code.El Centro earthquake wave was selected as longitudinal and vertical input ground motion.This model was tested by a single large shaking table.According to the experimental phenomenon, the acceleration, displacement, hysteretic performance and strain of concrete and steel were investigated.The damage status and dynamic response characteristics under different earthquake excitation were studied.The results show that: large longitudinal displace of pier is prone to leading to unseating or damage due to collision; the hysteretic curve of a fixed pier is more regular than that of a movable pier, the drift ratio of the fixed pier is much larger than that of a movable pier, and the earthquake force at the bottom is much large than that of a movable pier, which implies that much attention should be paid to the design of a fixed column.

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single -column girder bridge / shake table test / seismic design / experimental phenomenon / seismic response / hysteretic curve / strain distribution

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SHAO Changjiang1,2,QI Qiming1,WEI Wang1,HU Chenxu1,WANG Meng1, XIAO Laichuan1,XIAO Zhenghao1. Shaking table test of seismic performance of a simply-supported girder bridge with single column[J]. Journal of Vibration and Shock, 2019, 38(16): 49-55

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