Test On Vibration Caused By Subway And Response Research Of Structure And Pile-soil

With the acceleration of urbanization and the urban transportation network density increasing, Environmental vibration and noise problems caused by transport systems are becoming increasingly apparent. While emerging issues in urban transport systems are endlessly, Metro system can transport large amounts of traffic passenger flow and it is also punctual, fast, efficient, health characteristics. But the vibration problem caused by the metro is intensified and it is seriously affecting people’s daily lives and work. The development trend of China’s subway system showed that Subway construction is behind the house building. The subway operation hour starts from 6:00.am until about 11:00.pm or longer. As a result, the effect time of vibration and noise lasts for more than 17 hours. Study of environmental vibration propagation has become a hot research today and it attracted more and more people’s attention. For these reasons, this article is carried out from the following perspectives:In the first chapter, this paper would summarize the significance of the subway vibration research and the current domestic and international subway vibration on-site tests, the finite element simulation, dynamic interaction of Soil-structure research. On the basis, some problems and research direction that would be studied in the future are pointed out.In the second chapter, it is about that the vibration of Guangzhou Metro Line 1 was tested on-site. The test paths were divided into two and the points of different distances were measured. In the end, the propagation of vibration was analyzed from the time domain, frequency domain and 1/3 oct frequency.In the third chapter, Based on the actual engineering drawings, this article would use the finite element software MIDAS/GEN to build three-dimensional finite element model of the building. The propagation characteristics of vibration in layers floor, beams, columns would be studied. Finally, it would analyze if the vibration amplitude overrun and make suggestions on how to do seismic isolation on member level.Finally, Through the data of the actual project collection, this paper would use the software MIDAS/GTS/NX to establish three dimensional finite element model containing the track bed and Soil-structure. A appropriate subway vibration source model and parameters was selected to obtain input load. Meanwhile, Vibration response was analyzed under no pile foundation or the pile foundation in coordinating contact and nonlinear contact. In the end, this paper would provide a reference about dynamic soil structure interaction for future researchers.