Research On Train-Induced Vibration Of High-Speed Railway Station

With the rapid development of high-speed railway, the functional requirement of railway station is also improving contiouously. In order to realize "zero-distance transfer or short-distance transfer" among railway, subway, light railway and bus,"building-bridge integration" structures are widely adopted in the newly constructed large-scale railway stations. With the track being a member of the station frame, this new structure system will lead to dynamic loadings on the structure directly from the train, which will have great dynamic effects on the station.Focusing on Tianjin West Railway Station, with vertical acceleration and vertical displacement being the indexs, considering the effects of types, velocities, running lines and double lane drive of the trains comprehensively, this dissertation systematically studies the dynamic characteristic and attenuation law of train-induced vibration in "building-bridge integration" railway station by the methods of field test and numerical analysis. Meanwhile, the peak acceleration limit of waiting hall is deduced. At last, the dynamic characteristics of train-induced vibrations bwtween "building-bridge integration" and "building-and-bridge separation" railway station are compared. The main research contents are as follows:(1) Based on the acceleration datas of Tianjin West Railway Station tested in construction stage and application stage respectively, the dynamic characteristic and attenuation law of train-induced vibration in "building-bridge integration" railway station are studied by the indexs of VAL and1/3octave spectrum. Considering the response characteristic of train-induced vibration and environmental features of waiting hall, the applicabilities of environmental vibration evaluation standards at home and abroad to "building-bridge integration" railway station are discussed by the indexs of peak acceleration value and VLz.(2) Based on Tianjin West Railway Station, train-induced vibration accelerations of "Building-bridge integration" railway station are calculated in which the train loads are simulated as a series of moving loads, the calculated peak acceleration values are compared with the tested results which improved the reliability of numerical analysis results. The effects of running lines, velocities and double lane drive of the trains on dynamic responses of the structure are analyzed comprehensively by the indexs of vertical acceleration and displacement. At last, the peak acceleration limit for waiting hall is calculated based on German DIN4150standard and vibration charcateristics of Tianjin West Railway Station, the vibration comfort of waiting hall of Tianjin West Railway Station in the case of double lane drive is evaluated.(3) Based on the tested acceleration datas of Tianjin South Railway Station, the similarities and differences of train-induced vibration’s dynamic characteristic and attenuation law bwtween "building-bridge integration" and "building-and-bridge separation" railway station are discussed by the indexs of VAL and1/3octave spectrum.