地铁运行区域新建建筑全过程实测与数值模拟

发布时间：2018-07-17 15:18

【摘要】：以邻近地铁线路的某新建建筑为例,对从项目动工至建筑封顶过程中的主要节点进行全过程实测,得到地铁经过时自由场地及施工不同阶段建筑内部各楼层的振动数据。建立单体的有限元模型,采用不同的激励输入方式进行数值模拟,并将计算结果与实测结果进行对比验证,以获取既有地铁运行区域拟建建筑施工前振动预测的有效方法。在数值分析过程中,针对环境振动,提出了"原位激励"的概念。分析结果表明:一致激励输入仅适用于建筑平面尺寸较小时进行初步预测;原位激励与多点激励的输入方式计算结果准确可靠,可满足设计各个阶段的振动预测需求;根据不同的需求可分别选择采用原位激励或多点激励的输入方式进行振动预测;采用自由场地实测结果作为输入激励进行振动预测时,可将计算结果根据不同的建筑类型进行修正。该研究成果可对既有地铁运行区域拟建建筑施工前进行振动评价提供参考。
[Abstract]:Taking a newly built building adjacent to the subway line as an example, the whole process of measuring the main nodes in the process from the start of the project to the peak of the building is carried out, and the vibration data of each floor inside the building during the passage of the subway and in different stages of construction are obtained. The single finite element model was established and the numerical simulation was carried out by using different excitation input methods. The calculated results were compared with the measured results to obtain the effective method of vibration prediction before the construction of the planned building in the operating area of the existing subway. In the process of numerical analysis, the concept of "in situ excitation" is proposed for environmental vibration. The analysis results show that the uniform excitation input is only suitable for the initial prediction of small building plane size, and the calculation results of in-situ excitation and multi-point excitation are accurate and reliable, which can meet the needs of vibration prediction in all stages of design. According to different needs, the input mode of in-situ excitation or multi-point excitation can be used to predict the vibration, and when the measured results of the free site are used as the input excitation to predict the vibration, The calculation results can be modified according to different types of buildings. The research results can be used as a reference for vibration evaluation before construction of existing metro operating areas.
【作者单位】：同济大学建筑工程系;中国建筑设计院上海中森建筑与工程设计顾问有限公司;
【分类号】：TU974;U231

【相似文献】