人行桥人致振动烦恼率模型的建立

Human-induced vibration annoyance rate model of pedestrian bridges

Stevens根据实验指出,外界刺激的物理量与心理量具有正比关系,比以往基于Fechner定律的烦恼率模型更符合实际情况.引入Stevens定律,根据统计学和心理物理学,得到离散和连续分布情形下的Stevens隶属度函数,并建立新的烦恼率模型.为验证改进的人行桥烦恼率求解的准确性和可靠性,对实际人行桥进行现场测试.研究结果表明:Stevens烦恼率模型能更准确地描述主观反应的不确定性;近似曲线的拟合值与实测值的变化规律具有较强的一致性. Stevens烦恼率模型能在如何评价人行桥步行振动舒适度方面带来新的凭据.

Based on experiments,Stevens showed that the physical quantity of external stimuli is directly proportional to the psychological quantity,which is more realistic than the previous annoyance rate model based on Fechner's law.Therefore,this paper introduces Stevens law,obtains Stevens membership function for discrete and continuous distribution based on statistics and psychophysics,and establishes a new annoyance rate model.In order to verify the accuracy and reliability of the improved pedestrian bridge annoyance rate solution,field tests were carried out on the actual pedestrian bridge.The results show that the Stevens annoyance rate model can describe the uncertainty of subjective response more accurately.The fitting value of the approximate curve is in good agreement with the measured value.The Stevens annoyance rate model can provide new evidence on how to evaluate the comfort of pedestrian vibration of footbridges.