Acceleration Response Spectrum for Predicting Floor Vibration due to Single Human Bounce Load

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (5) : 14-19.

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.

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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.

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long span floor / vibration serviceability / acceleration response spectrum / bounce loads

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CHEN Jun 1,2 WANG Lei2 LOU Jia-yue2 XU Ruo-tian2 LI Guo2 . Acceleration Response Spectrum for Predicting Floor Vibration due to Single Human Bounce Load[J]. Journal of Vibration and Shock, 2015, 34(5): 14-19

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