Due to the rapid development of urban mass rail transit

plenty of adjacent buildings and infrastructures are unavoidably threatened by the vibration induced by train running.The present paper establishes a completely 3 Dfinite element model of the train-track-viaduct-foundation-soil coupled system

based on a large-scale parallel computing cluster platform.The vibration behavior of the ground and the adjacent structures caused by trains running under different conditions are analyzed and the main conclusions can be drawn as follows:the floor vibration is not sensitive to the height of the building;with the increase of the train speed

the vibration level of each floor increases;with the increase of the distance from the building to the viaduct

the vibration level of each floor decreases;Generally

for low and moderate height multi-story buildings

especially for those of four stories or lower

there is a trend that the vibration level will increase with the floor elevation.Nevertheless

for high-rise buildings

the distribution of vibration versus the floors is different.The most significant vibration occurs on the floors at mid-span

depending on the height of the building.Furthermore

the maximum vibration velocity in the vertical direction is much higher than that in the horizontal direction.