Shaking table test of simply supported bridge considering ground liquefaction
In order to study the collapse mechanism of simply supported bridges under liquefiable site conditions,this paper combines the actual earthquake damage investigation and carries out a shaking table model test on the widely used simply supported bridge under simulated liquefaction ground.Continuously enhanced white noise and sine wave excitation were used as the input of the shaking table.The collapse mechanism of the simply supported bridge under liquefaction ground is studied.The results show that the liquefaction phenomenon can be reproduced well by the shaking table test.The maximum strain position and the natural frequency of the piles decrease with the increasing liquefaction,and the increasing relative displacement between adjacent piles will lead to the bridge collapse.The damage mode of the experimental results is close to that of the actual seismic phenomena.This paper can provide a significant reference for the study of soil-structural interaction under earthquakes and also accumulate the experimental data for the seismic safety evaluation of existing similar bridges.
seismic damage investigationsimply supported bridgeliquefactioncollapseshaking table test
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