| 地铁列车振动荷载引起的隧道动力响应分析 |
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| 引用本文： | 黄庆祥.地铁列车振动荷载引起的隧道动力响应分析[J].路基工程,2018,0(4):161-165. |
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| 作者姓名： | 黄庆祥 |
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| 作者单位： | 山西省交通科学研究院, 太原 030006 |
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| 摘 要： | 已开通运营地铁工程长期承受地铁列车振动荷载的影响，会造成地表不均匀沉降，管片结构附加应力增大，地表振动频率过大易出现城市环境振动污染，影响居民正常生活。以某运营城际铁路为工程依托，采用人工数定激振力函数模拟地铁列车振动荷载，建立了地铁列车振动荷载下隧道动力响应分析模型，对隧道管片结构弯矩及上部地层竖向位移进行监测分析，将地表竖向位移振动加速度换算为等效声级，结合城市环境振动标准，可知列车行驶过程中，地表振动环境污染符合城市环境振动标准规定的限值。
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| 关 键 词： | 列车振动荷载 人工数定激振力 动力响应 城市环境振动污染 时程曲线 |
| 收稿时间： | 2019-11-09 |
The Dynamic Response Analysis of the Tunnel under Subway Train Vibration Load |
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| Abstract: | The metro engineering going into operation is bearing subway train vibration loads for a long term, causing differential settlement of ground surface and increased additional stress on segments. The excessive vibration frequency of the ground surface is easy to cause urban environmental pollution which influences the normal life of residents. Based on an operational interurban railway project, the train vibration load was simulated by artificially deterministic exciting force function. The numerical model for dynamic response analysis of the tunnel under subway train vibration load was established. During the calculation, the bending moment of the segment and vertical displacement of upper stratum were monitored and analyzed. By transforming the vibration acceleration of the vertical displacement to the equivalent sound level, we can know that environmental pollution by surface vibration accords with the limit requirement specified in vibration standard of urban environment. |
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