Research On Key Technology Of Large Bridge-Building Railway Station

Recent years, the construction of high speed railway develop fastly. According to announcement of the national development and reform commission, in the future five years, the investment of high-speed railway construction will maintain the present status, the annual investment 7,000 billion yuan.The ancillary facility is also large-scale construct, such as station building. The structure of bridge-building is widely used to the station building. The features of which is that larger interior space and good visual effect. its roof is designed to use long-span space frame roof structure and adopts steel to be the building materials. The characteristics of this kind of structure is that good holistic stiffness, light mass, large flexible and small damping. But it is sensitive to the dynamic loads. In the bridge-building structure, the railway beam which is carrying the high-speed railway is the foundation of the upper large-span structure. So the dynamic rasponse due to high-speed railway loads can influence on the upper structure. In this paper, the dynamic response of large-span structure due to high-speed railway is researched. the following research works are carried out:1. Coupled analysis of train-bridge system due to moving loads.The engineering background is Wuhan railway station. The coupled analysis model of train-bridge system is done due to high-speed train loads. The dynamic characteristic of train-bridge is analysised.2. the dynamic response analysis of large-span construct due to high-speed train loadsThe reaction at support is get from the model of train-bridge calculation, that is compared with the measurement results to ensure the accuracy. And based on it, the finite element model of large-span structure is eatablished. The dynamic response of large-span structure is analysis.3. Vibration comfort research of bridge-building structure due to high-speed train loads The vibration comfort of wuhan railway station is done by the method of the numerical simulation and in-situ measurement. Measure point is located in the platform, waiting room and office area of Wuhan railway station.4. The fatigue analysis of large-span structure due to high-speed train loadsThe finite element model of two types of cast steel joints(cast steel joint at column angle and cast steel joint at bottom chord) is established. Based on the linear accumulative damage theory, the fatigue charateristic is analysised.5. Vibration comfort research of bridge-building structure due to co- work of high-speed train loads and pedestrian loads.Now, the safety and vibration comfort probrlem due to pedestrian loads are more and more attention. In this text, the influence of pedestrian loads is considered. The virbation comfort of zhengzhou east railway station is analysis due to the pedestrian loads and high-speed train loads.The research of this paper is significant to ensure the safe use of bridge-buidling structure. For the domestic the similar projects in the future, the research of this paper can provide the reference to the dynamic analysis and structure design.