考虑不同踏步高宽比的行人上下楼梯荷载试验研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (9) : 299-307.

论文

张尧1,2，宋志刚1

作者信息 +

Human induced load tests for pedestrian walking up and down stairs considering different rise and run ratios

ZHANG Yao1,2, SONG Zhigang1

Author information +

文章历史 +

摘要

为获得上下楼梯人致荷载模型，研究楼梯踏步高宽比对人行荷载的影响，在三种不同踏步高宽比（1:1.6，1:2.0和1:2.3）的楼梯上，利用无线惯性测量装置开展了人致荷载观测，获得了27名被测者在1.6~4.4Hz步频范围内上下楼梯的1500条荷载时程。通过快速傅里叶变换得到相应荷载频谱，统计分析动载因子(dynamic load factors，DLF)随步频的分布规律及特征，进一步计算了三种楼梯动载因子的相对偏差。结合上述分析，给出了上行和下行楼梯时人致荷载各阶动载因子的统计模型并重构荷载时程的相位角，发现楼梯踏步高宽比不同导致的动载因子偏差在30%范围内。

Abstract

To set up the pedestrian-induced load model on stairs and evaluate the influences of step geometry, the load measurements were executed on three kinds of stairs with different values of rise and run ratios (namely 1:1.6, 1:2.0 and 1:2.3). 27 volunteers were asked to ascend and descend on stairs under the step frequencies ranging from 1.6Hz to 4.4Hz. A total of 2046 series of load time histories were recorded by wireless inertial measurement units, and were divided into harmonics by the Fourier transform. The dynamic load factors (DLFs) were statistically summarized with respect to step frequencies. Further, the relative deviations of the average DLFs of each kind of stairs is introduced to evaluate the influence of rise and run ratios. Finally, the phase angle of each harmonics was proposed to reconstruct the load histories, which were compared with measured ones to verify the load model. Results shows that the rise and run ratios have limited influences on DLFs. The deviation induced by the geometrical feature is within 30%.

导出引用

张尧1,2，宋志刚1. 考虑不同踏步高宽比的行人上下楼梯荷载试验研究[J]. 振动与冲击, 2022, 41(9): 299-307

ZHANG Yao1,2, SONG Zhigang1. Human induced load tests for pedestrian walking up and down stairs considering different rise and run ratios[J]. Journal of Vibration and Shock, 2022, 41(9): 299-307

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