Equivalent Dynamic Load Factor of Different Non-Exceedance Probability for Crowd Jumping Loads
Equivalent Dynamic Load Factor of Different Non-Exceedance Probability for Crowd Jumping Loads
复制标题
人群跳跃载荷不同不超标概率的等效动载荷系数
DOI:
10.3390/buildings12040450
复制
发表时间:
2022-04
期刊:
影响因子:
3.8
通讯作者:
Ziye Pan
中科院分区:
文献类型:
--
作者:
Jiecheng Xiong;Shuqian Duan;Hui Qian;Ziye Pan
Existing dynamic load factors (DLF) for crowd jumping loads are modeled by identifying the peaks and energies from the corresponding Fourier amplitude spectrum, which may underestimate and overestimate structural responses, respectively. Based on the principle of equal structural responses, this study herein develops an equivalent DLF, using the frequency response function to weight and integrate the power spectral density (PSD) matrix of crowd jumping loads. Firstly, massive PSD matrices of different crowd sizes and different metronome frequencies are simulated using a random field model of crowd jumping loads. Thereafter, the equivalent DLF of different structural damping ratios, crowd sizes, metronome frequencies, and non-exceedance probabilities are investigated, and a model of the equivalent DLF is established accordingly. It is believed that this model could provide an efficient and accurate way to conduct reliability design for structures subjected to crowd jumping loads.
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