(中船第九设计研究院工程有限公司,上海200063)

 [摘要] 针对某商业中心大跨楼盖振动舒适度问题，在对国内外楼盖振动评价标准进行汇总分析的基础上，通过建立整体有限元模型，研究该类建筑中大跨楼盖的振动特性。以IABSE建议的单人步行激励为基础，对该大跨楼盖进行了人行荷载模拟，并通过多点输入和时程分析法对该楼盖进行振动舒适度分析，分析结果表明：采用TMD减振系统可以有效地控制大跨楼盖的竖向振动，各工况下的振动平均衰减率可达45%。通过对影响TMD减振效果的弹簧刚度、有效质量等参数进行分析，优化得到TMD布置的最佳参数。本文可为类似的大跨楼盖的振动舒适度的分析和控制系统设计提供参考和借鉴。

[关键词] 大跨楼盖；振动控制；调谐质量阻尼器；舒适度

中图分类号：TU375.5              文献标识码：A 

Design and analysis on vibration control of long-span floor structures based on simulation of crowd walking

   Wu Yibin，Zhu Weihua，Qu Ge

(China Shipbuilding NDRI Engineering Co., Ltd.，Shanghai 200063，China)

Abstract：The vibration serviceability of long-span floors in large business mansion is studied. Based on reviewing on the evaluation standard of floors vibrations in different reports, a finite element model is established to know the vibration properties of the long-span floors in this structure. The human induced loads are modeled by using single person walking forces of IABSE. Then the vibration serviceability of the floors is analyzed by a multi-support excitation and time history analysis method. The results show that the TMD systems can control the vertical vibration of the long-span floor effectively and the average attenuation rate can be up to about 45%. Finally, the main factors of TMD, stiffness, quality are analyzed to obtain the optimized parameters. The study described in this paper can provide a reference for the analysis of vibration serviceability and determination of control system for these structures.

Keywords: long-span floor; vibration control; tuned mass dampers; human comfort

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