超大悬挑异形UHPC结构振动舒适度分析与控制  

Vibration Comfort Analysis and Control of Super-large Cantilever Special-shaped UHPC Structures

作　　者：刘天安 LIU Tian'an(Shanghai Construction No.4(Group)Co.,Ltd.,Shanghai 201103,China)

机构地区：[1]上海建工四建集团有限公司,上海201103

出　　处：《建筑施工》2024年第10期1561-1565,共5页Building Construction

基　　金：上海市科学技术委员会启明星项目扬帆专项(22YF1418400)。

摘　　要：以上海大歌剧院核心区的螺旋楼梯为背景,该楼梯为国内首次采用超高性能混凝土(UHPC)构造的超大悬挑异形结构。鉴于目前对于UHPC悬挑结构的振动舒适度控制研究尚缺乏成熟先例,研究采用有限单元法对结构的模态和加速度响应进行了深入分析,并结合实地检测,形成了一套振动舒适度分析技术。在此技术基础上,采用调谐质量阻尼器来控制结构的振动舒适度,并通过数值模拟确定调谐质量阻尼器TMD的布置方案。最终,在工程实践中,验证了这套针对超大悬挑异形UHPC结构的振动舒适度分析与控制技术,研究所得经验可为未来类似工程提供有价值的参考。The spiral staircase in the core area of the Shanghai Grand Opera House represents the first application of ultra-high performance concrete(UHPC)in constructing an super-large cantilever special-shaped structure in China.Given the current lack of established approaches for vibration comfort control in UHPC cantilever structures,the modal and acceleration responses of the structure are extensively analyzed using the finite element method.Combined with field testing,a vibration comfort analysis technique is developed.This technique is utilized to control the structure's vibration comfort using a tuned mass damper(TMD),with its arrangement determined through numerical simulation.The vibration comfort analysis and control technique for super-large cantilever special-shaped UHPC structures is ultimately validated in engineering practice.The research experience can provide valuable reference for future similar projects.

关 键 词：振动控制 UHPC结构 悬挑结构 动力学模拟 减震器 

分 类 号：TU745.2[建筑科学—建筑技术科学]