地铁车辆段上盖物业车致振动分析

发布时间：2018-12-13 09:26

【摘要】：为研究地铁列车进出车辆段对上盖物业振动的影响,先结合两个实际工程,对武汉某车辆段和宁波某车辆段内运用库列车振动荷载进行现场实测,并对两车辆段内运用库列车振动荷载进行对比分析,探讨车辆段内运用库列车振动荷载特性。然后改善了基于弱振情况下结构精细化有限元模型构建方法和荷载输入方法,并基于实测数据验证了其合理性。最后建立了武汉某车辆段上盖物业精细化有限元模型,计算分析上盖物业的振动响应。计算结果表明:地铁列车进出车辆段引起上盖建筑物的振动高频成分较丰富,其主频率在40 Hz附近,列车振动荷载特性决定了建筑物内振动的频域分布;建筑内楼板跨中各方向振级沿高度方向的变化是不同的,铅垂向Z振级沿楼层的上升呈现先减小后增大的特点,而在水平方向振级总体上呈现随楼层增大而增大的特点。该研究成果可为精确预测、分析和评价地铁车辆段上盖物业振动舒适度提供基础。
[Abstract]:In order to study the effect of subway train entering and leaving depot on the vibration of superstructure property, the vibration load of train in Wuhan depot and Ningbo depot is measured on the spot by combining two practical projects. The vibration load characteristics of the train in the depot are discussed by comparing and analyzing the vibration load of the train in the two depots. Then the method of building fine finite element model and the method of load input under weak vibration are improved, and the rationality of the method is verified based on the measured data. Finally, the fine finite element model of the upper cover property of a car depot in Wuhan is established, and the vibration response of the upper cover property is calculated and analyzed. The results show that the high frequency components of the superstructure vibration caused by the train entering and leaving the depot are abundant, and the main frequency is about 40 Hz. The vibration load characteristics of the train determine the frequency distribution of the vibration in the building. The variation of the vibration level along the height direction is different in the middle of the floor span. The vertical Z vibration level decreases first and then increases along the floor, while in the horizontal direction the vibration level increases with the increase of the floor. The research results can provide a basis for accurate prediction, analysis and evaluation of vibration comfort of the upper cover of metro depot.
【作者单位】：武汉理工大学土木工程与建筑学院;武汉地铁集团有限公司;
【基金】：国家自然科学基金项目资助(51178365) 武汉理工大学研究生自主创新基金(2014-ZY-082)
【分类号】：U231;U211.3;TU311.3

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