High-speed Train Influence The Vibration Of The Building Structure

For the elevated station, because of an organic whole that viaduct connected with the main structure of station, it is possible that the vibration caused by the train through the viaduct may make the entire building structure not be used normal or make normal users and visitors' unease, even more panic. Therefore, it is necessary to conduct in-depth study about the law of impacted vibration caused by high-speed trains through the station on the elevated structure. In this paper, taking the New Guangzhou Station as example, the vibration of building structures induced by the high-speed train was discussed. The main research works are as follows:1) It is difficult to evaluate the vibration response of the "train-bridge-structure" integrated complex system. Aiming at this problem, this article discusses and puts forward a new scheme that the vibration response of "train-bridge" system and "bridge-structure" system are researched respectively. In this paper, based on comprehensive consideration of our country's actual circumstance and international practices, the suitable standards of vibration control are selected for the different systems.2) According to the theory of vibration analysis of train-bridge time-varying system, the analysis of vehicle-bridge coupling vibration on the separate continuous bridge from the New Guangzhou Station structure is implemented in this paper, and the conclusion is educed that the bridges which are the foundations of the New Guangzhou Station are safe and stabile enough.3) The dynamic interaction analysis of the "train-bridge- structure" system is realized by dividing entire model into two subsystems, the dynamic calculating models of "train- the equivalent bridge" system and the "bridge-structure" system. The analysis and solution of the two subsystems are accomplished respectively. And the bridge excitant time history induced by the high-speed trains will be calculated and used to integrate the two subsystems.4) The dynamic model of "train-bridge" system is established in GSAP software, thus the bridge excitant time history induced by the high-speed trains can be obtained. The "bridge-structure" system model of dynamic analysis is achieved in ANSYS. And the program is developed by APDL language which is used to solve the time-history analysis procedures, making a "bridge-structure" system dynamic analysis achievable.5)By analyzing the results of the dynamic analysis in two contrasted models, the overall model of "bridge-structure" system and the sub-model with canopy and roof removed from the overall model, the evaluation of vibration response for the waiting room can be implemented by the dynamic analysis of the sub-model instead of the overall model, so that the efficient of calculation is improved significantly.6) By analyzed the results of the analysis of dynamic in two contrasted models, which one is the overall model of "bridge - structure" system and the other is the sub-model of canopy and roof are removed from the overall model, the evaluation of vibration response for the waiting room can be implemented by the dynamic analysis of the sub-model to replace the overall model.7) By analyzing the value and distribution of the displacement and acceleration of the floor on typical conditions and checking the internal forces of the representative structure of the floor, combined with the corresponding evaluation criteria, this paper elicits the conclusion that the entire structure of New Guangzhou Station is safe and comfortable.