单人Bounce荷载下楼盖结构加速度反应谱设计

发布时间：2018-01-13 17:22

本文关键词：单人Bounce荷载下楼盖结构加速度反应谱设计　出处：《振动与冲击》2015年05期 　论文类型：期刊论文

【摘要】：Bounce指双脚不离地的人体上下往复运动,是一种常见的有节奏人致激励。采用先进的无线测力鞋垫技术收集了175条bounce荷载曲线,计算每条荷载曲线的单自由系统加速度反应谱,在此基础上提出了设计反应谱分段表达式,主要分为三段:对应bounce一阶主频范围2~3.5 Hz的第一平台段、对应二阶主频范围4~7 Hz的第二平台段以及对应高阶频率的下降段,由试验数据分析给出了两个平台段的不同保证率下的代表值以及下降段参数。文中给出了设计反应谱的详细使用步骤,并通过大跨楼盖试验模型验证了方法的准确性。
[Abstract]:Bounce refers to the movement of the human body up and down, which is a kind of common rhythmic human-induced excitation. Using advanced wireless force-measuring insole technology, 175 bounce load curves are collected. The acceleration response spectrum of a single free system is calculated for each load curve, and a piecewise expression of the design response spectrum is presented. It is mainly divided into three segments: the first platform segment corresponding to the first order of bounce main frequency range of 2kHz, the second platform segment corresponding to the second order main frequency range of 410Hz and the descending segment corresponding to the high-order frequency. The representative values of the two platforms under different guarantee rates and the parameters of the descending section are given by the analysis of the test data. The detailed steps of the design response spectrum are given in this paper. The accuracy of the method is verified by the long span floor test model.
【作者单位】：同济大学土木工程防灾国家重点试验室;同济大学建筑工程系;
【基金】：国家自然科学基金项目资助(51178338,51478346) 教育部新世纪优秀人才支持计划(NCET-12-0416)
【分类号】：TU352.1
【正文快照】： 随着社会经济的不断发展,新型结构形式与高强轻质材料等在公共建筑中的广泛运用,楼盖结构跨度越来越大。另一方面,文化生活的日渐丰富使得参加流行音乐会和大型体育活动等逐步普及,这些活动都会伴有人群有节奏的运动。大跨楼盖基频低阻尼小,当人群有节奏运动的频率与楼盖自振

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