Dynamic Characteristics Analysis of Vibration Damping Wall in Subway Station
In order to reduce the vibration energy generated by subway train operation transforming to the ground through the main structure of the subway station,a vibration isolation wall of the station is designed.Taking Jinrongdao station of the express line from Xiong'an to Beijing Daxing International Airport as the research background,a damping layer composed of viscoelastic materials is set inside the station wall to form a vibration isolation wall.The vibration reduction effect of vibration isolation wall under the train load is analyzed.The results show that:under the action of train load,in view from the time history results,the vibration isolation wall of the station can reduce the average vibration acceleration amplitude of the soil around the station by 28.6%and the peak vibration acceleration by 31.9%;in view from the spectrum analysis,the peak value of soil vibration acceleration around the station decreases by 66.1%at the maximum,with an average decrease of 45.1%;in view from 1/3 octave spectrum,the maximum vibration acceleration level in soil can be reduced by 5.5 dB,with a drop of 8.4%.It is concluded that setting the damping layer of viscoelastic materials into the main structure wall of the station can effectively reduce the propagation of train vibration energy in the main structure of the station.
vibration and wavestructural vibration reductionnumerical calculationsubway station
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