Research On The Influence Of Subway Operation On The Vibration And Comfort Of High-rise Buildings

The operation of subway in the city has improved some traffic congestion problems,but also brought environmental vibration problems,thus affecting the comfort of surrounding buildings.At present,most of the research on the vibration caused by subway operation directly uses the numerical simulation method.The research method of direct numerical simulation lacks the support of measured data and cannot guarantee the correctness of the research.Based on the actual measurement data of a high-rise building and a subway under construction,through the analysis of the measured data and the finite element numerical simulation,this paper studies the influence of subway operation on the vibration and comfort of the building structure.The main research contents are as follow:(1)According to the measured data,through the analysis of acceleration time history curve of high-rise building vibration caused by subway operation,the vibration propagation law caused by subway operation is studied.The data are transformed into discrete Fourier transform,and the Fourier spectrum of vibration acceleration is obtained.The frequency distribution of high-rise building vibration caused by subway operation and the distribution of vibration in each frequency segment are analyzed.(2)The finite element modeling software is used to build a numerical model of a high-rise building.The correctness of the model is verified.Based on the finite element model,taking the measured data as the input of environmental vibration,the vibration response of high-rise buildings in different floors and positions under the action of subway operation load is analyzed.(3)Through the requirements of relevant standards and calculation methods,the comfort analysis and evaluation of the finite element model calculation data are carried out to understand the impact of subway operation on the comfort of high-rise buildings.The concept and calculation method of sensitivity are used to calculate and analyze the influence of sensitivity of high-rise buildings caused by subway operation,and the corresponding conclusions are given as a supplement to the comfort evaluation.