Research On Effects Of Vibration For Tall Building Caused By High-speed Train Considering Soil-pile Interaction

In order to solve the problem that the development of the city was hindered by traffic congestion, China has increased investment in high-speed railway and urban rail transit construction. Rail transit has become the preferred way to travel because of the advantages of convenience, security and speedy. In spite of its convenience for people’s travel, running trains also exert a strong vibration influence on the surrounding environment at the same time, which affect the comfort, durability and even safety of structures. This seriously interfere people’s work, life and learn and gradually attract people’s attention. Thus we should make a research on the vibration source, transmission and vibration structures to solve these problems. Based on the produce mechanism of the rail system vibration, the vibration transmission and characteristics of surrounding structure vibration response were researched in depth. The research can be used to solve the vibration influence along the railway tracks and also provide reference and basis for planning and appraisement of rail transit system.Through theoretical analysis of environmental vibration, the train – track – sleeper – earth – foundation- structure system was divided into train – track – sleeper- the earth system and the track – sleeper – earth – foundation- structure system based on the sub-structure method. Considering the nonlinear contact relationship of the interaction of piles and soil, the track- sleeper- earth- foundation- structure finite element analysis model was established by the finite element analysis software SNSYS. And the vibration response characteristics of structural systems under different conditions were simulated using this finite element model. Finally, according to the our 《Urban area environmental vibration standard》(GB10070-88), the comfort of high buildings affected by train loads was evaluated. This article main research content includes:(1)Based on the research of the train and track coupling dynamic analysis model and track irregularity excitation calculated reaction force track node caused by the pressure of the role of the train wheel track nodes. To analyze the transmission and attenuation law of vibration wave, established track-sleeper- earth finite element model.(2)Based on the soil-foundation-high buildings interaction analysis model, according to the basic analysis method of elastic-plastic theory, complete simulation of the nonlinear contact between pile and soil, thereby established the track- earth-foundation- structure system the finite element analysis model.(3)Based on the research of the vibration response of structural systems under different distances, different speeds and different floors, the vibration response characteristics of the foundation and high buildings were achieved. And vibration response of high buildings considering the effect of soil-pile interaction was comparatively analyzed. Comfort evaluation of structural systems was completed.In this paper, effects of vibration for high buildings caused by high-speed trains were researched considering the soil-pile interaction. Considering the different condition and the contact relationship of pile and soil, the vibration responses of high buildings were simulated. It can provide the basis for future planning and appraisal of similar structures and has obvious practical significance.