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。本文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2~3.5Hz的第一平台段、对应二阶主频范围4~7Hz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 up-down movement of human body with two feet remaining on the ground. Bounce is one of the most common rhythmic body movements. 175 bounce loading curves were collected by wireless in-sole technology. Each measured load curve was then used to calculate the acceleration response spectrum of single-degree-of-freedom system. Based on all the calculated curves, a design-oriented piece-wise spectrum was proposed in this paper. The suggested spectrum consists mainly three parts: the first resonant plateau ranging from 2.0-3.5 Hz, the second resonant plateau ranging from 4.0-7.0 Hz and the descending part going with frequencies from 7.0-15.0 Hz. The representative value of each plateau and the mathematical representation for the descending curve were determined statistically for different confidence levels. A detailed application procedure for the proposed spectrum approach is presented and has been applied to the model of long span floor to predict acceleration responses, and the results can verify the availability of the response spectrum method.
关键词
大跨楼盖 /
振动舒适度 /
加速度反应谱 /
bounce荷载
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Key words
long span floor /
vibration serviceability /
acceleration response spectrum /
bounce loads
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参考文献
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