Effects of different human body parameters on the vertical dynamic characteristics of a pedestrian structure perception coupled system

Abstract

Abstract Different dynamic parameters of the human body will affect the vertical dynamic characteristics of the structure. If this parameter is ignored, it will affect the serviceability evaluation results. To consider the influence of different human dynamic parameters on the human-induced vibration of the floor, the pedestrian-structure-perception coupling equation is established in this paper, taking the lightweight CFS composite floor as an example. 60 sitting people of different ages and genders are selected as perceptions, the dynamic parameters of the human body are mass, stiffness, and damping. By calculating the frequency and damping ratio of the floor when pedestrians pass through the floor at an asynchronous frequency, as well as the dynamic response of the floor and the perceiver, The effects of human dynamic parameters on the dynamic characteristics of pedestrian-structure-perception coupling system are compared. The results show that with the change of pedestrian walking position, in the pedestrian-structure-perception coupling system, when the pedestrian walks near the mid-span of the structure, the frequency of the structure reaches the minimum and the damping ratio of the structure reaches the maximum. The influence of men’s dynamic parameters on the frequency and damping of the structure is greater than women and children, with values of 3.74% and 186.50%. Comparison of acceleration 1-s RMS, the perceiver is larger than the floor. When evaluating the serviceability of the floor, the interaction of the pedestrian-structure-perception coupling system should be considered.