Analysis and monitoring of subway-induced vibration on a surrounding building
To study the vibration influence of urban rail transit on buildings along the line,a frame-shear wall structure near a subway was selected as the research object.Under the excitation of rail transit vehicles,vibration monitoring of typical buildings was carried out at the foundation,along the height direction and the horizontal direction of the building,and the evaluation criteria such as 1/3 octave plumb vibration acceleration level,peak acceleration,and plumb fourth power vibration dose value were used for the analysis.The research results indicate that when the structure is 55 meters away from the inner contour of the tunnel,significant subway-induced vibration can still be detected inside the structure,and the relevant evaluation values may exceed the regulatory limits.In addition,the existing regulations do not specify the selection criteria for subway vibration,and the evaluation quantities determined by different value methods may seriously underestimate the impact of subway-induced vibration.Along the height direction of the structure,the vertical vibration response of the measurement points from the first underground level to the third above ground level did not significantly decrease,and there may be amplification at the top.The vertical vibration at the center of the floor slab is significantly amplified compared to the edge of the floor slab.The plumb fourth power vibration dose value at the center of the slab can reach 345%of that at the corner of the slab,and the corresponding maximum vertical vibration acceleration level can increase by 12.9 dB.
万方数据
维普
