Research On Vibration And Noise Of Chengdu Commercial Over-track Buildings On The Subway

With the rapid construction of the subway and put it into use,in order to make full use of the vertical space of the land and improve the urban land utilization efficiently,setting up over-track buildings on the subway has gradually become the trend of development.But on put the foundation of over-track buildings directly above the source of vibration,it makes the vibration and secondary structural noise of the buildings,which affects people’s daily life and work seriously.Therefore,it is very necessary to solve the problem of vibration and noise pollution while carrying out the development of over-track buildings,to ensure that it meets the requirements of environment.Thus providing reference to the vibration and noise.pollution control of the built over-track buildings on the subway,and providing basis for the pre-planning of over-track buildings under construction or planning.The main contents are as follows:(1)According to the relevant standards of vibration and noise in China,the criteria for evaluating the vibration and secondary structural noise of over-track buildings on the subway are determined.(2)Building a prediction model of vibration source for over-track buildings on the subway based on wheel/rail interaction,constructing a three-dimensional FE model of railway stations-buildings,and the method of vibration and noise analysis of building structure under train load is given.(3)Taking over-track buildings of a metro station in Chengdu as an example,calculating the vibration acceleration and secondary structural noise in the room of buildings,the vibration comfort and the secondary structural noise level were also evaluated.(4)Suggesting the reasonable and feasible measures of reducing vibration according to the engineering practice,the optimization of different vibration reduction measures are carried out through the calculation of vibration and noise of buildings under different vibration reduction conditions,and determine feasible control measures.