基于某城市地铁激励的邻近建筑振动响应预测
发布时间：2019-06-27 21:14
【摘要】：研究目的:某城市地铁正在建设,为取得较为可靠的地铁运行对邻近建筑振动影响的预测精度,有必要对地质条件较为特殊的该城市地铁沿线开展特定研究。本文针对该城市中软Ⅲ类场地土,建立地铁列车-轨道垂向耦合振动数值模型及隧道-土体-建筑有限元模型,参考该城市地铁参数,对邻近地铁的一般建筑在地铁运行时的振动响应作出理论预测。研究结论:(1)地铁邻近建筑的振动主频体现为结构的自振频率,且建筑低层存在地铁激励的中高频反弹区;(2)列车车速和单双线运行将显著干预邻近建筑的振动响应峰值,但对建筑的振动形态无明显影响;(3)多层建筑至隧道中心水平距离在5 m范围内,小高层与高层建筑在10 m范围内或30~40 m的振动放大区内,车速超过60 km/h时,邻近建筑全部或部分楼层振动响应可能超越相关振动限值,需进一步考虑减振控制;(4)该研究结论可为地质条件相似地区的地铁设计施工及未来的振动控制提供理论和技术支持。
[Abstract]:Research purpose: a city subway is under construction. In order to obtain more reliable prediction accuracy of the influence of subway operation on the vibration of adjacent buildings, it is necessary to carry out specific research along the subway line with special geological conditions. In this paper, aiming at the soft class III site soil in this city, the vertical coupling vibration numerical model of subway train and track and the finite element model of tunnel soil building are established. Referring to the parameters of the city subway, the vibration response of the general building adjacent to the subway during subway operation is predicted theoretically. The conclusions are as follows: (1) the main vibration frequency of the adjacent subway building is the natural vibration frequency of the structure, and there is a middle and high frequency rebound area excited by the subway in the lower floor of the building. (2) the train speed and single and double lane operation will significantly interfere with the peak value of the vibration response of the adjacent building, but have no obvious effect on the vibration form of the building. (3) the horizontal distance from the multi-storey building to the center of the tunnel is in the range of 5 m, and the vibration control of the small high-rise building and the high-rise building is in the range of 10 m or 30 鈮，
本文编号：2507151
[Abstract]:Research purpose: a city subway is under construction. In order to obtain more reliable prediction accuracy of the influence of subway operation on the vibration of adjacent buildings, it is necessary to carry out specific research along the subway line with special geological conditions. In this paper, aiming at the soft class III site soil in this city, the vertical coupling vibration numerical model of subway train and track and the finite element model of tunnel soil building are established. Referring to the parameters of the city subway, the vibration response of the general building adjacent to the subway during subway operation is predicted theoretically. The conclusions are as follows: (1) the main vibration frequency of the adjacent subway building is the natural vibration frequency of the structure, and there is a middle and high frequency rebound area excited by the subway in the lower floor of the building. (2) the train speed and single and double lane operation will significantly interfere with the peak value of the vibration response of the adjacent building, but have no obvious effect on the vibration form of the building. (3) the horizontal distance from the multi-storey building to the center of the tunnel is in the range of 5 m, and the vibration control of the small high-rise building and the high-rise building is in the range of 10 m or 30 鈮，
本文编号：2507151
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