| In order to tackle the inconvenience of the old station appeared during the process of running, such as the disturbance of the square traffic, the bad waiting room environment, inconvenient passenger transfer and the excessive walk line and so on, the high speed railway station mainly use the elevated station as its structural style. For the elevated station, because of an organic whole that viaduct connects with the main structure, combined with the fact that trains pass the station building with high speed, it is possible that the coupling vibration caused by the train running through the viaduct may make the entire building structure not be used normally or make users and visitors'uncomfortable, even more panic. Therefore, it is necessary to conduct in-depth study about the law and control technology of impacted vibration caused by high-speed trains running through the station on the elevated structure. In this paper, take the new ChangSha Train Station as an example, the vibration effect of the station is analyzed and the structural vibration control is investigated, which can promote and hasten the development of the structure vibration control research of high-speed railway station. The main contributions of the dissertation are as follow:1) The spatial vibration analysis model of the train/bridge/structure system is established. A new scheme is put forward that the train/bridge/structure system is divided into the train/bridge system and the bridge/structure system and the dynamic interaction analysis of the entire system is realized by analyzing the individual subsystems and combining them through the interaction forces between wheel and track. Furthermore, standard evaluation of the train/bridge vibration control and standard evaluation of the structure/circumstance vibration control are chosen to accomplish the analysis and obtain the solutions of two subsystems.2) According to the dynamic model of train/bridge system established in GSAP software, the analysis of track bridge coupling vibration on the separate bridge from the New ChangSha Station structure is implemented in this paper, and the conclusion is drawn that the quality of dynamic behavior of structure and the running performance of train body are quite well and the running safety of the main structure of station and the comfort degree of train both meet the requirement.3) The dynamic model of bridge/structure system is established in SAP2000 software. According to the excitant time history on bridge induced by the high-speed trains obtained from the analysis of the bridge/structure system, the vibration response of the waiting floor and canopy excited by train on typical conditions are calculated. According to the displacement,acceleration and distribution of the key points of the track and waiting hall floor slab, this paper arrives at the conclusion that, the vibration responses of the waiting floor and canopy excited by train are far less than the allowable value, which is far enough to ensure the safety of the station structure.4) The damping effect of the track and waiting hall floor slab are studied. Through selecting appropriate parameters for TMD, damping of the vertical displacement of the track and waiting hall floor slab is 10.3%-35.2%and 10.76%-18.63%, and damping of the vertical acceleration is 10.76%-18.63%and 10.70%-23.14%.The analysis results show that the damping effects are ideal.5) By comparing between theoretical and real value of the acceleration of waiting hall floor slab towards vibration reduction controlling, the result shows small difference between them. So this paper elicits the conclusion that theoretical model and the analysis method are practicable and the results are credible. So they can provide a referential value for future engineering. |
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