Study Of Structural Designing Load Of Impact By Derailing Train

With the recent rapidly development of high-speed railway, high-speed rail in operating mileage, operating speed and scale of construction in China are to squeeze into the world. The number and the area of high-speed railway passenger station building in domestic cities also will be significantly improved, and the development is directed to large-scale integrated transport hub. Because the high population density and complexity of the layout of the building structure and other characteristics required station house was designed not only to satisfied merely general construction of the common requirements, but also to ensure its the structural robustness and operational sustainability during the incidents, such as impact or blasting. However, with the development of high-speed railway, the accidents of crash near structures by derailed train are also increasing. So researching the support members of domestic high-speed rail station should be as soon as possible.According to existing norms and foreign research results, to determine the structural crash loads related to train derailment gesture and computing model with an associated impact force of the train. Therefore, it was chose the domestic grouped into eight vehicles CRH2type EMU as the study object in this article, and were carried out numerical simulation respectively for train derailment gesture and computing model with an associated impact force of the train.By calculating the sum of the three major train derailment attitude factors (train and the contact surface of the friction coefficient, the initial derailment angle and the initial velocity) the speed of the train derailed, derailment displacement variation, draw the initial point of derailment of the train derailment angle the greatest impact, and found that in a certain derailment area, the velocity of the component with the train derailment lateral displacement increases linearly.The longitudinal stiffness of the train collision model directly affects the accuracy of the impact force value. Therefore, before the study of the change law of the train and the rigid wall impact force, this paper through the train and the rigid wall collision resulting positive impact force-displacement curve to determine the model longitudinal rigidity to ensure the effectiveness of the impact model. Subsequent research has been calculated multiple conditions and summed up the change of the train maximum impact force and impact velocity as a function.Finally, this paper calculated the dynamic amplification factor μ, inspired by the theory of random vibration and the target probability method, using common statistics with statistical characterization, and obtained the impact equivalent static loads Fequ of structures. Then the paper summed a variation of Fequ and impact height H with impact velocity. Their functions were gained using the variation. Combined with operating speed of the main line of domestic high-speed rail station, the ultimate value and scope of Fequ about close structural columns were determined.