地铁振动对既有砌体结构影响规律及因素数值分析

发布时间：2018-05-29 03:19

本文选题：地铁振动 + 砌体结构　；参考：《振动与冲击》2014年06期

【摘要】：以上海某地铁线路邻近砌体结构为研究对象,建立详细数值模型。以楼外实测振动加速度为输入激励,实测室内振动响应校核模型参数。通过数值分析,研究振动随楼层变化规律及同楼层内不同楼板结构、不同房间大小等因素对振动响应分布规律影响。结果表明,列车经过时较大跨度的室内楼板中央竖向振级较楼板墙边振级大1~3 dB;预制板房间竖向振动强度大于现浇板房间,预制板间灰缝处对振动强度有一定放大作用;房间进深参量对振动强度影响较小可忽略不计,进深与振动强度大小关系与进深尺寸及开间尺寸大小有关;开间参数对竖向振动影响较大,开间越大,振动强度越大;振动强度与楼板角部及周边约束情况关系密切。
[Abstract]:Taking the adjacent masonry structure of a subway line in Shanghai as the research object, a detailed numerical model is established. The measured vibration acceleration outside the building is taken as input excitation, and the model parameters of indoor vibration response are measured. Through numerical analysis, the effects of different floor structure and different room size on vibration response distribution are studied. The results show that the central vertical vibration level of the indoor floor slab with a long span is 1 ~ 3 dB larger than that of the floor wall, and the vertical vibration intensity of the prefabricated board room is greater than that of the cast-in-place slab room, and the cement joint between the prefabricated boards can enlarge the vibration intensity to a certain extent. The influence of room depth parameters on vibration intensity is negligible, the relationship between depth and vibration intensity is related to the size of the depth and the size of the open space, the influence of the parameters of the room on the vertical vibration is greater, and the greater the opening, the greater the vibration intensity. The vibration intensity is closely related to the corner and peripheral restraint of floor.
【作者单位】：同济大学建筑工程系;
【基金】：十一五国家科技支撑计划项目资助(2006BAJ03A07-04)
【分类号】：U231;TU311.3;TU364

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