(1 贵州省交通规划勘察设计研究院股份有限公司， 贵阳 550081； 2 贵州大学空间结构研究中心， 贵阳 550003)

［摘要］钢-混凝土组合空腹夹层楼盖是一种典型的三维受力结构构件。通过贵州省博物馆新馆5D影厅楼盖进行现场模态实测及有限元计算的方法研究了此种楼盖的自振特性，并在此基础上对其跨高比及空腹率两个影响楼盖基频的主要参数进行回归分析，以寻求此类楼盖自振频率的简化计算方法。研究表明，钢-混凝土组合空腹夹层楼盖自振特性与实心平板楼盖类似，基频较低，自振频率比较密集，属于模态密集型结构。通过回归分析推导出楼盖基频与跨高比和空腹率的关系式。

［关键词］空腹夹层楼盖； 大跨结构； 贵州省博物馆； 自振特性； 跨高比

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2020)05-0104-05

Self-vibration characteristics analysis and research of steel-concrete composite open-web sandwich plates

Xu Xiangdong1, Ma Kejian2, Du Bin1, Tang Zhi1

(1 Guizhou Transportation Planning Survey and Design Academe Co., Ltd., Guiyang 550081, China; 2 Space Structure Research Center, Guizhou University, Guiyang 550003, China)

Abstract:Steel-concrete composite open-web sandwich plates are a typical three-dimensional force structures. The self-vibration characteristics of the plates which were applied to the 5D studio in Guizhou Museum were studied by the field mode test and the finite element method. Based on the self-vibration characteristics analysis, the regression analysis of the span-depth ratio and the fasting rate was carried out in order to find the simplified calculation method for the frequency of such plates. The research shows that the self-vibration characteristics of steel-concrete composite open-web sandwich plates are similar to solid plates. The fundamental frequency of steel-concrete composite open-web sandwich plates is lower, and its frequencies are quite dense. Therefore, it belongs to the mode-intensive structure. The relationship between the fundamental frequency, the span-depth ratio and the fasting ratio was derived through regression analysis.

Keywords:open-web sandwich plates; long-span structure; Guizhou Museum; self-vibration characteristics; span-depth ratio

*“十二五”国家科技支撑计划 (2011BAJ09B01)。

作者简介：徐向东，博士，工程师，Email: dallenxu@163.com。