地铁周边建筑物的竖向减振措施研究
发布时间：2018-08-05 19:58
【摘要】：为缓解全球大气变暖及交通拥堵的情况,地铁由于其环保、快捷、舒适、安全、高效的优势,在近年来得到迅速发展。但是因为地铁要不可避免的穿越城市中心,以及轨道密度、行车密度越来越高,其运行诱发的振动对建筑物内部的人们的生活产生重大影响。在结合国内外对地铁周边建筑物减振研究的基础上,采用碟形弹簧隔振装置对一框架结构进行减振,通过模态分析和时程分析,分析隔振前后的振动特性表以及对比隔振前后每层的竖向加速度及层间位移,以验证碟形弹簧隔振支座的隔振效果。论文主要成果如下:1)对已有研究成果进行总结,探讨列车运行引起的振动的机理、传播途经及规律、建筑物对振动的响应以及减振措施。了解碟形弹簧特性,并以此为基础结合本框架结构设计不同组合的隔振支座。2)以ADINA有限元软件为基础建立土体模型,分析了不同黏土层对振动特性的影响以及振动在土体中的传播规律,得出以下结论:黏土层的弹性模量越大,其峰值加速度越小,衰减也较快,并且高强度的振动持续时间相对较短,然而弹性模量较小的黏土层中,加速度幅值较大,振动衰减较慢。3)采用SAP2000有限元软件建立一框架结构模型,然后用整体输入的方式,分析了当黏土层弹性模量为20 MPa时,地铁运行引起的振动波对其的影响,得出以下结论:框架结构的底层和顶部振动较为强烈,中间楼层较弱,同时建筑结构对振动的响应主要以2~15 Hz的低频振动为主,并且楼层越高,低频振动的影响越明显。4)建立了有隔振支座和无隔振支座的两个框架模型,通过计算分析,得出以下结论:碟形弹簧隔振支座可使上部结构的周期变长,竖向加速度大幅减少,竖向隔振效率可达51.23%~93.81%,隔振后的楼层层间位移变化平缓,同时复合后的碟簧刚度越小,隔振效果越明显。
[Abstract]:In order to alleviate global warming and traffic congestion, the subway has developed rapidly in recent years because of its environmental, fast, comfortable, safe and efficient advantages. But because the subway must inevitably cross the center of the city, and the density of the track, the density of the driving is getting higher and higher. The vibration induced by the subway runs to the people in the building. On the basis of the study of vibration damping of the surrounding buildings around the subway, the disc spring vibration isolation device is used to reduce the vibration damping of a frame structure. Through modal analysis and time history analysis, the vibration characteristic table before and after vibration isolation and the vertical acceleration and interlayer displacement of each layer before and after isolation are compared to verify the disc shape. The main achievements of this paper are as follows: 1) the main achievements of the paper are as follows: the existing research results are summarized, the mechanism of vibration caused by the train operation, the propagation path and the law, the response of the building to vibration and the damping measures are discussed. The characteristics of the disc spring are understood, and the vibration isolation of different combinations based on this frame structure is designed on the basis of this frame structure. Base.2) based on the ADINA finite element software, the soil model was established. The influence of different clay layers on the vibration characteristics and the propagation law of vibration in the soil were analyzed. The following conclusion was drawn: the larger the modulus of the clay layer, the smaller the peak acceleration, the faster the attenuation, and the relatively short duration of the high intensity vibration. However, the elastic modulus of the high strength is relatively short. In the clay layer with small modulus, the acceleration amplitude is larger, the vibration attenuation is slow.3), a frame structure model is established by the SAP2000 finite element software. Then the influence of the vibration wave caused by the subway operation when the elastic modulus of the clay layer is 20 MPa is analyzed. The following conclusions are drawn: the bottom and the top of the frame structure. The vibration is strong and the middle floor is weak. At the same time, the response of the building structure to the vibration is mainly based on the low frequency vibration of 2~15 Hz, and the higher the floor is, the more obvious the influence of the low frequency vibration is.4). The two frame models of the vibration isolation bearing and the non isolating support are established. The following conclusion is drawn by the calculation and analysis: the disc spring isolation bearing can make the following conclusion The period of the superstructure becomes longer, the vertical acceleration is reduced greatly, the vertical vibration isolation efficiency can reach 51.23%~93.81%, and the interlayer displacement of the floor after vibration isolation is slow. At the same time, the smaller the disc spring stiffness is, the more obvious the vibration isolation effect is.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1
[Abstract]:In order to alleviate global warming and traffic congestion, the subway has developed rapidly in recent years because of its environmental, fast, comfortable, safe and efficient advantages. But because the subway must inevitably cross the center of the city, and the density of the track, the density of the driving is getting higher and higher. The vibration induced by the subway runs to the people in the building. On the basis of the study of vibration damping of the surrounding buildings around the subway, the disc spring vibration isolation device is used to reduce the vibration damping of a frame structure. Through modal analysis and time history analysis, the vibration characteristic table before and after vibration isolation and the vertical acceleration and interlayer displacement of each layer before and after isolation are compared to verify the disc shape. The main achievements of this paper are as follows: 1) the main achievements of the paper are as follows: the existing research results are summarized, the mechanism of vibration caused by the train operation, the propagation path and the law, the response of the building to vibration and the damping measures are discussed. The characteristics of the disc spring are understood, and the vibration isolation of different combinations based on this frame structure is designed on the basis of this frame structure. Base.2) based on the ADINA finite element software, the soil model was established. The influence of different clay layers on the vibration characteristics and the propagation law of vibration in the soil were analyzed. The following conclusion was drawn: the larger the modulus of the clay layer, the smaller the peak acceleration, the faster the attenuation, and the relatively short duration of the high intensity vibration. However, the elastic modulus of the high strength is relatively short. In the clay layer with small modulus, the acceleration amplitude is larger, the vibration attenuation is slow.3), a frame structure model is established by the SAP2000 finite element software. Then the influence of the vibration wave caused by the subway operation when the elastic modulus of the clay layer is 20 MPa is analyzed. The following conclusions are drawn: the bottom and the top of the frame structure. The vibration is strong and the middle floor is weak. At the same time, the response of the building structure to the vibration is mainly based on the low frequency vibration of 2~15 Hz, and the higher the floor is, the more obvious the influence of the low frequency vibration is.4). The two frame models of the vibration isolation bearing and the non isolating support are established. The following conclusion is drawn by the calculation and analysis: the disc spring isolation bearing can make the following conclusion The period of the superstructure becomes longer, the vertical acceleration is reduced greatly, the vertical vibration isolation efficiency can reach 51.23%~93.81%, and the interlayer displacement of the floor after vibration isolation is slow. At the same time, the smaller the disc spring stiffness is, the more obvious the vibration isolation effect is.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1
【参考文献】
相关期刊论文 前10条
1 楼梦麟;贾旭鹏;俞洁勤;;地铁运行引起的地面振动实测及传播规律分析[J];防灾减灾工程学报;2009年03期
2 宋晶;郝s，
本文编号：2166861
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2166861.html
