(1 沈阳建筑大学土木工程学院，沈阳 110168；2 内蒙古碧城房地产开发有限公司，呼和浩特 010010)

［摘要］以辽宁省某改扩建高中食堂三层框架结构为研究对象。首先，对二层楼盖进行了结构动力特性检测，并依据《建筑工程容许振动标准》（GB 50868—2013）的竖向振动计权加速度级限值要求，对该层楼盖的振动舒适度进行了评估；然后，以楼盖结构动力特性的现场实测数据为基础，在MIDAS/Gen上建立了反映结构实际动力特性的有限元模型；最后，依据二层楼盖人群荷载流动情况，设置了考虑荷载模型、步频、人群数、行走路径等因素的21种荷载工况，以楼盖竖向峰值加速度和均方根加速度为评价指标，并根据ISO2631-2(1989)及《高层建筑混凝土结构技术规程》(JGJ 3—2010)等相关规定，详细分析了各工况下楼盖振动干扰程度和影响范围。分析结果表明，与沿楼盖短轴方向相比，沿长轴方向行走引起的振动峰值加速度和均方根加速度更大，而人员跑动激励比行走激励更容易引发楼盖振动舒适度问题。 

［关键词］大跨度楼盖； 改扩建结构； 舒适度分析； 人行荷载； 振动； 检测 

中图分类号： TU375-4 文献标识码： A文章编号：1002-848X(2021)16-0102-08

Analysis on floor vibration comfort of a reconstructed and expanded high school dining hall 

JIN  Qiao1,  WU  Xiangyu1,  WANG  Chuanke2,  HU  Jiafei1,  DAI  Yuxuan1 

(1 School of Civil Engineering , Shenyang University of Architecture，Shenyang 110168， China；2 Inner Mongolia Bicheng Real Estate Development Co., Ltd.，Hohhot 010010， China) 

Abstract: The three-story frame structure of a high school dining hall in Liaoning Province was taken as the research object. Firstly, the structural dynamic characteristics of the second floor were tested, and the vibration comfort of the floor was evaluated according to the limit value of the weighted acceleration level of the vertical vibrometer in the Standard for allowable vibration of building engineering (GB 50868—2013). Then, based on the field measured data of dynamic characteristics of floor structures, a finite element model reflecting the actual dynamic characteristics of the structure was established by MIDAS/Gen software. Finally, according to the load flow of people on the second floor,21 load conditions were set up by changing the load model, step frequency, crowd number and walking path. Taking the vertical peak acceleration and root mean square acceleration of the floor as the evaluation indicators, and according to ISO2631-2 (1989)  and Technical regulations for concrete structures of high-rise buildings (JGJ 3—2010) and other relevant provisions, the vibration interference degree and influence range of floor under various working conditions were analyzed in detail. The analysis results show that the peak acceleration and root mean square acceleration of vibration caused by walking along the long axis are greater than those along the short axis of the floor, and the running excitation of people is more likely to cause the problem of floor vibration comfort than the walking excitation. 

Keywords:large-span floor； reconstruction and extension structure； comfort analysis； pedestrian load； vibration； inspection

*国家重点研发计划（2018YFC1504303）。

 作者简介：金峤，博士，副教授，硕士生导师，Email：goldenfss@163.com。