Acceleration response spectrum for predicting floor vibration due to occupants jumping
Acceleration response spectrum for predicting floor vibration due to occupants jumping
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DOI：
10.1016/j.engstruct.2016.01.013
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发表时间：
2016-04
影响因子：
5.5
通讯作者：
Jun Chen;Guo Li;V. Racic
中科院分区：
文献类型：
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作者：
Jun Chen;Guo Li;V. Racic
本文提出了一个加速度反应谱来预测楼层的反应，由于人员跳跃。对单个跳跃载荷进行实验，得到506个记录。每个记录被应用到一个单自由度系统，具有不同的频率和阻尼比，以获得相应的加速度反应谱。对结果进行统计分析，得出代表性光谱，并进一步用于推导分析设计光谱曲线。建议的设计频谱覆盖0.5-15 Hz的结构频率范围，并由三个主要部分组成：第一平台，第二平台和下降。光谱参数的设计值通过将每个部分的数学函数拟合到实际数据来确定。建议的频谱进行了验证，通过比较其预测与实测响应从实验地板模型和地板的现有结构引起的单个个人和人群跳跃。
This paper proposes an acceleration response spectrum to predict floors’ responses due to occupants jumping. Experiments were conducted on individual jumping loads resulting in 506 records. Each record was applied to a single-degree-of-freedom system with various frequencies and damping ratios to obtain a corresponding acceleration response spectrum. Statistical analysis of the results led to a representative spectrum, which is further used to derive an analytical design spectrum curve. The suggested design spectrum covers a structural frequency range of 0.5–15 Hz and consists of three main parts: the first plateau, the second plateau and the descent. Design values for spectrum parameters were determined by fitting each part’s mathematical function to actual data. The proposed spectrum was verified by comparing its predictions with measured responses from an experimental floor model and floors of existing structures induced by both single individuals and crowds jumping.