The Influence Of Residential Building Vibration Caused By Metro Trains Operation On Human Annoyance

In recent years,with the rapid development of China’s urban rail transit,the problem of environmental vibration caused by subway train operation has become increasingly prominent.There are many vibration complaints in Beijing,Shanghai and other cities.With the rapid development of subway and the gradual improvement of people’s living requirements,the determination of vibration standard limits also need more scientific theory and data as the support.The vibrationlimit value should be based on the people’s requirements for vibration comfort in different areas,and taking into account the national economic development level and the cost of vibration control.In order to determine the above problems,it is necessary to make clear what proportion of people’s vibration comfort can be guaranteed by the vibration limits in the code,and this requires the basic research of exposure-response relationship between the environmental vibration and residents’comfort as an important scientific reference.Based on the above research background,this thesis was supported by the Beijing Natural Science Foundation Project"Study of the exposure-response relationships for resident annoyance caused by building vibration and secondary noise from metro trains".Focusing on the conversion of vibration index and exposure-response relationship,a systematic study was carried out using the combination methods of theoretical derivation,numerical simulation and field test.Moreover,the influence of vehicle and track state change on residents’annoyance in residential buildings was also investigated.The main research work includes:1.The mutual conversion relationship between VL_z,max and VDV was derived,and the undetermined coefficient in the conversion formula was fitted based on the field measured data.Finally the conversion relationship between the two indexes was obtained.According to the research results of the existing exposure-response relationship performed in the UK,the exposure-response curve between the vibration response of subway and the proportion of residents’annoyance based on China’s environmental impact assessment index VL_z,max was obtained.2.Two residential buildings in Beijing and Shijiazhuang,where the residents are seriously affected by subway vibrations,were tested.The vibration data at 16 measuring points were measured.Based on the test data,the undetermined coefficients in the derived index conversion relationship were fitted,and the 3D finite element model was verified.3.Taking a residential building with residents’complaints about vibrations along the subway line as the research object,the finite element model of tunnel-stratum-building was established by using the software MIDAS-GTS.The subway train loads were calculated using the multi-body dynamics software SIMPACK.The calculation results were calibrated using the field measurement data to ensure the model validity.4.The influences of rail surface short-wavelength irregularity,wheel out-of-roughness and train speed on residents’annoyance were analysed.The supporting forces under the fasteners were calculated using the vehicle-track coupling model,and then the influences of the above parameters on the indoor vibration response of residential buildings were considered.The exposure-response relationship calculated in this thesis was used to analyse the influence of the above different vehicle and track states on the residents’annoyance in residential buildings.