PROPAGATION RULE OF SUBWAY VIBRATION IN BUILDING AND VIBRATION-ISOLATING EFFECT OF SAND LAYER
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摘要: 结合位于上海地铁10号线正上方的某教学楼工程,建立土-结构相互作用的平面有限元模型,研究了砂垫层在地铁振动减振方面的效果以及振动在建筑中的传播规律,同时揭示了地铁振动和地震波的差异,指出地铁振动模拟时模型单元的划分应该考虑地铁振动优势频率的影响,得到了砂垫层地铁振动隔振效果不明显的结论。最后给出了工程实际采用的隔振措施及其他可以采用的隔振措施。Abstract: Based on a real building which is constructed over No.10 underground railway in Shanghai,the paper investigates the vibration isolating effect of sand layer and the propagation rule of vibration in structure by erecting soil-structure combining plan finite element method model.It shows that sand layer has little contribution to reducing the vibration.Meanwhile by discussing the difference between earthquake and subway vibration,it shows that element size should decided by the excellent frequency of vibration.In the end,farther isolating measures are suggested.
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Key words:
- sand layer /
- subway vibration /
- vibration propagation /
- element size
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[2] 黄菊花,何成宏.地基中振动波的有限元分析[J].振动与冲击,1999,27(3):38-43. 杨先健.弹性地基板与地面屏障并联隔振设计[J].建筑结构,1994,24(12):12-16. [3] 申跃奎.地铁激励下振动的传播规律及建筑物隔振减振研究[D].上海:同济大学,2007. [4] 张璞.列车振动荷载作用下上下近距离地铁区间交叠隧道的动力响应分析[D].上海:同济大学,2001.
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