
地铁振动对既有砌体结构影响规律及因素数值分析
Numerical analysis of metro train-induced vibrations and their influences and affecting factors on existing masonry building
Based on one masonry structures in Shanghai adjacent to the subway,setted up a detailed numerical model. The measured vibration acceleration was carried out to be the input excitation and model parameters was calibrated by the measured vibration response. Through numerical analysis , Study on variation regularity of vibration with the floor, the same floor in different floor structure, different room size and other factors had an effect on the vibration response distribution. The results show that: when the subway passed, the vertical vibration at larger mid-span was 1~3dB higher than the corner of walls. The vertical vibration arrangement of precasted slab room was greater than the castplate room. The vertical vibration at the ash between the precasted slabs, had a certain amplification effect;the room depth parameters had a small effect on the vibration, can be neglected;the relationship with the room depth and the vibration intensity related with the size of the width and depth of the room. the width of room had a big effect on the vertical vibration, the bigger of the width of the room, the higher of the vibration. vibration intensity has great relationship with floor corner and the surrounding constraint conditions.
地铁振动 / 砌体结构 / 数值模拟 / 振动分布特性 / 板材特性 / 楼板角部及周边约束 {{custom_keyword}} /
subway-induced vibration / masonry building / numerical analysis / the vibration distribution characteristics / sheet properties / floor corner and constraint conditions of floor {{custom_keyword}} /
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