地铁运行引起典型砖混结构振动的现场测试与影响评价方法研究

发布时间：2018-04-20 07:53

本文选题：地铁振动 + 砖混结构　；参考：《建筑结构》2017年S2期

【摘要】：基于对地铁沿线小区砖混结构建筑内居民的问卷调查,发现地铁振动对砖混结构建筑有一定影响,以北京地铁某线路周边的砖混结构建筑物为例进行了以下几个方面的研究:首先测量了建筑场地内的振动,对实测结果进行了时域和频域分析,通过分析发现竖向振动响应要显著大于水平向振动响应,且地铁振动响应的主要频率集中在40~80Hz,随着离地铁中心线距离的增加低频振动逐渐显现。然后结合现场实际情况,建立了隧道-土层-建筑物的三维有限元模型,施加列车的运行荷载后研究其对周边临近砖混结构的影响,并将模型计算结果与实测结果进行了对比分析,通过分析发现两者吻合度较好。对不同近接距离下砖混结构建筑受地铁振动的影响进行模拟,利用《城市区域环境振动标准》(GB 10070—88)中有关居民、文教区内的房屋振动限制进行分区,得到符合建筑使用舒适度的安全距离。
[Abstract]:Based on the questionnaire survey of the residents of brick and concrete structure buildings along the subway, it is found that the vibration of the subway has a certain impact on the brick and concrete structure buildings. Taking the brick and concrete structure building around a Beijing subway line as an example, the following aspects are studied: firstly, the vibration in the building site is measured, and the measured results are analyzed in time and frequency domain. It is found that the vertical vibration response is significantly larger than the horizontal vibration response, and the main frequency of the subway vibration response is 40 ~ 80Hz, and the low-frequency vibration gradually appears with the increase of the distance from the center line of the subway. Then, the three-dimensional finite element model of tunnel, soil layer and building is established in combination with the actual situation in the field. After the train loads are applied, the influence of the model on the adjacent brick-concrete structure is studied. The model results are compared with the measured results, and the results show that the agreement between the two models is good. This paper simulates the effect of subway vibration on brick and concrete structure buildings at different close distances, and divides the buildings in the cultural and educational areas by using the vibration limit of buildings in the area of urban environmental vibration (GB 10070-88). Get a safe distance that conforms to the comfort of the building.
【作者单位】：北京科技大学土木与资源工程学院;强震区轨道交通工程抗震研究北京市国际科技合作基地;北京市住房和城乡建设科学技术研究所;
【基金】：国家自然科学基金资助项目(51178045) 教育部海外名师资助项目(MS2011BJKJ)
【分类号】：TU398.5

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