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大跨度楼盖结构人员舒适度控制指标为竖向振动频率及竖向振动加速度。以黑龙江中医药大学文体中心B区的57 m×39 m+57 m×36 m双跨多层(地下1层、地上3层)工程为例,利用环境激励,采用频域法模态拟合方法对该结构进行了现场竖向振动模态测试,获得了该楼盖结构前4阶竖向自振频率、振型及竖向加速度,并采用有限元方法对结果进行了分析与评价。研究结果表明:楼盖竖向1阶振动频率的有限元分析和测试结果均满足现行规范要求;楼盖竖向峰值加速度实测结果满足小于0.005g的要求,不会引起人体的不舒适;有限元方法计算频率比实测结果偏高,是因约束条件不同所致,故设计中需要考虑楼盖与柱的刚性连接。
Long-span floor structure comfort control indicators for the vertical vibration frequency and vertical vibration acceleration. Taking the 57 m × 39 m + 57 m × 36 m double-span multi-storey project (B1 underground and 3 above ground) in Area B of Cultural and Sports Center of Chinese Medicine University of Heilongjiang University of TCM as an example, using environmental excitation, Methods The vertical vibration modes of the structure were tested and the vertical natural frequencies, mode shapes and vertical accelerations of the first four steps of the floor structure were obtained. The results were analyzed and evaluated by finite element method. The results show that the finite element analysis and test results of the first order vibration frequency of the floor cover all meet the requirements of current codes. The measured results of the vertical peak acceleration of the floor cover less than 0.005g, which will not cause the human body discomfort. The calculated frequency of the method is higher than the measured result due to the different constraint conditions, so the rigid connection between the floor and the column needs to be considered in the design.