【作者】 罗权；

【导师】 凌育洪； 晏平宇；

【作者基本信息】 华南理工大学 ， 工程硕士（专业学位）， 2018， 硕士

【摘要】 地铁以其节省地面空间、绿色环保、快速、安全等特点得到了大力发展,目前地铁正处于高速发展期,城市轨道交通网日渐密集,地铁运行引起的环境振动问题日益突出,环境振动对地铁沿线的居民和建筑物产生了严重影响,对地铁运行引起的上部结构振动响应进行研究已十分必要。本文以华南理工大学博学楼为研究对象,结合现场实测数据,研究地铁运行引起的振动在上部框架结构中的传播规律;然后以某剪力墙住宅为另一个研究对象,初步探究地铁运行引起的振动在上部剪力墙结构中的传播规律。本文主要进行以下几个方面的研究:(1)对华南理工大学博学楼进行现场实测,首先对实测数据进行加速度时程分析,研究振动加速度变化规律。其次利用傅里叶变换对实测数据进行频谱分析,研究振动的频率分布特性。最后对实测数据进行振级分析,研究振级的传播规律。(2)采用有限元分析软件ANSYS建立了华南理工大学博学楼三维有限元模型,建模过程考虑梁的剪切刚度并采用7个控制频率构造阻尼矩阵,有限元分析采用实测振动波作为振动激励。将模型计算的振动响应值与实测数据的振动响应值进行对比分析,验证有限元模型的可靠性,研究振动在框架结构中的传播规律。(3)设计了15个框架结构有限元模型进行参数化分析,研究柱截面、梁宽、梁高、板厚、层高、层数的改变对振动在框架结构中传播规律的影响,提供小框架结构振动响应的建议。(4)采用有限元分析软件ANSYS建立了某剪力墙住宅模型,剪力墙模型建模方法与华南理工大学博学楼模型建模方法一致,采用实测振动波作为激励进行时程分析,探究振动在剪力墙结构中的传播规律。(5)设计了15个剪力墙结构有限元模型,同时采用有限元分析软件ANSYS和SAP2000进行参数化分析,探究剪力墙墙厚、梁宽、梁高、板厚、层高、层数、剪力墙数的改变对振动在剪力墙结构中传播规律的影响,提供小剪力墙结构振动响应的建议,对比分析振动在框架结构和剪力墙结构中传播规律的差异。更多还原

【Abstract】 Metro has been greatly developed due to its features such as saving ground space,environmental protection,rapidity and safety.Nowadays,the metro is in a period of rapid development,urban rail transit networks are increasingly dense.The problem of environmental vibration caused by metro operation is becoming more and more serious,and environmental vibration has a serious impact on the residents and buildings along the metro.Therefor it is very necessary to study the vibration response of the superstructure caused by the subway operation.This paper takes the BoXue Building of South China University of Technology as the research object and combines the field measured to study the propagation of vibration caused by metro operation in the frame structure.This paper takes a shear wall residence as another research object,exploring the propagation of vibration caused by metro operation in the shear wall structure preliminarily.This paper mainly studies the following aspects:(1)The field measurement of the BoXue Building in South China University of Technology was carried out.Firstly,the measured data was analyzed to study the change rule of vibration acceleration.Secondly,Fourier transform was used to analyze the measured data in order to study the frequency distribution of vibration.Finally,the vibration level analysis was carried out to study the propagation law of the vibration level.(2)The finite element analysis software called ANSYS was been used to build the BoXue Building of South China University of Technology three-dimensional finite element model,the shear stiffness of the beam was considered and the seven control frequency damping matrix was used during the modeling process,the finite element analysis used the measured vibration wave as vibration excitation.The vibration response value of the model was compared with that of measured data in order to verify the reliability of the finite element model,then the propagation law of vibration in the frame structure was studied.(3)15 finite element models of frame structure were designed for parametric analysis.The influence of column cross-section,beam width,beam height,plate thickness,storey height and storey number on the propagation of vibration in frame structure were studied,and suggestions for reducing the vibration response of frame structure were provided.(4)Using the finite element analysis software ANSYS to build a shear wall residence model,the modeling method of shear wall model was consistent with that of the BoXue Building model of South China University of Technology.The measured vibration wave was used as vibration excitation to carry out the time history analysis,and the propagation law of vibration in shear wall structure was studied.(5)15 finite element models of shear wall structure were designed,and the parameter analysis was carried out by using the finite element analysis software ANSYS and SAP2000.The influence of wall thickness,beam width,beam height,plate thickness,storey height,storey number and shear wall number on the propagation of vibration in frame structure was studied and suggestions for reducing the vibration response of shear wall structure were provided.Finally,the differences in the propagation law of vibration in the frame structure and the shear wall structure were compared and discussed.更多还原