噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
1期
176-181
,共6页
振动与波%地铁运行%加速度振级%数值分析
振動與波%地鐵運行%加速度振級%數值分析
진동여파%지철운행%가속도진급%수치분석
vibration and wave%subway operation%vibration acceleration level%numerical analysis
福州地铁尚未建成时，需要对临近建筑物的振动响应进行预测。由此，建立车轨垂向耦合振动数值分析模型和隧道—土体—建筑物有限元模型，参考福州地铁振源参数及沿线典型II类场地土类型，对地铁运行后，临近建筑物的振动响应作出了理论预测。分析结果表明，地铁列车运行引发的环境振动主频以中高频振动为主，而建筑物各楼面峰值主频均为建筑物的自振频率。同时，在低层楼面存在激励振动的中高频反弹区。列车车速和单双线运行不影响建筑物的振动形态，但能显著影响楼面加速度振级。另外，当多层和小高层建筑至隧道中心水平距离小于10 m，高层建筑小于15 m及位于30 m左右处，车速超过40 km/h时，建筑物部分或全部楼层加速度振级可能超越相关规范规定的振动限值，需要考虑振动控制。
福州地鐵尚未建成時，需要對臨近建築物的振動響應進行預測。由此，建立車軌垂嚮耦閤振動數值分析模型和隧道—土體—建築物有限元模型，參攷福州地鐵振源參數及沿線典型II類場地土類型，對地鐵運行後，臨近建築物的振動響應作齣瞭理論預測。分析結果錶明，地鐵列車運行引髮的環境振動主頻以中高頻振動為主，而建築物各樓麵峰值主頻均為建築物的自振頻率。同時，在低層樓麵存在激勵振動的中高頻反彈區。列車車速和單雙線運行不影響建築物的振動形態，但能顯著影響樓麵加速度振級。另外，噹多層和小高層建築至隧道中心水平距離小于10 m，高層建築小于15 m及位于30 m左右處，車速超過40 km/h時，建築物部分或全部樓層加速度振級可能超越相關規範規定的振動限值，需要攷慮振動控製。
복주지철상미건성시，수요대림근건축물적진동향응진행예측。유차，건립차궤수향우합진동수치분석모형화수도—토체—건축물유한원모형，삼고복주지철진원삼수급연선전형II류장지토류형，대지철운행후，림근건축물적진동향응작출료이론예측。분석결과표명，지철열차운행인발적배경진동주빈이중고빈진동위주，이건축물각루면봉치주빈균위건축물적자진빈솔。동시，재저층루면존재격려진동적중고빈반탄구。열차차속화단쌍선운행불영향건축물적진동형태，단능현저영향루면가속도진급。령외，당다층화소고층건축지수도중심수평거리소우10 m，고층건축소우15 m급위우30 m좌우처，차속초과40 km/h시，건축물부분혹전부루층가속도진급가능초월상관규범규정적진동한치，수요고필진동공제。
Two models were established for analyzing the vibration responses of buildings adjacent to Fuzhou Metro. One of them was for numerical analysis of vehicle-track coupled vertical vibration, and the other was the tunnel-soil-build-ing coupled model of 3D FEM. In reference of the vibration source parameter of Fuzhou metro and typical in-situ soil distri-bution of kind II along the Metro line, vibration responses of buildings adjacent to the Metro induced by the subway opera-tion were predicted. The results show that the vibration responses of the adjacent buildings are mainly the medium and high frequency vibrations, and the dominant frequencies of the floors are the natural frequencies of the buildings. Meanwhile, in the lower floors there exist medium-and-high frequency rebound areas due to the excitation. Speed and single-or-double track traveling of trains have no influence on the vibration type of the buildings, but have significant effects on the vibration acceleration level of the floors. When the horizontal distance from the multistoried or middle-highrise building to the center-line of the subway are smaller than 10m, or the distance for highrise building is smaller than 15m, and the train speed ex-ceeds 40km/h, the vibration acceleration levels of the floors may exceed the standard vibration limit. In this case, measures for vibration control should be considered.
