Abstract
Under pedestrian load, significant vibration and comfort problems are easy to arise for large-span low-frequency structures so that human-structure interaction should be considered in the design. However, different human motion states have different human modal parameters, which makes the design more difficult. The Spring-Mass-Damper (SMD) model is used to conduct numerical simulation experiments on 6 box beams with different fundamental frequencies in 4 different human motion states, based on which the dynamic characteristics of the structure under 30 working conditions are compared and analyzed. It is recommended to use the modal parameters of the standing human body in the vibration comfort design, and use the modal parameters of the human body at normal walking speed for the design of the low-frequency structure.
Highlights
Large-span, light and flexible structural systems are widely used in large public buildings such as theaters, stadiums, pedestrian bridges, and airports
Both the SMD model and the MMSD model take into account the effects of human modal quality, modal stiffness and modal damping, and reflect the human-structure interaction reasonably, and are suitable to be dynamic models of the human-structure coupling system
The dynamic characteristics of the human-structure coupling system are studied in order to explore the influence of the human motion state on the human
Summary
Large-span, light and flexible structural systems are widely used in large public buildings such as theaters, stadiums, pedestrian bridges, and airports. The MD model does not take into account the influence of human modal stiffness, so there are limitations in use Both the SMD model and the MMSD model take into account the effects of human modal quality, modal stiffness and modal damping, and reflect the human-structure interaction reasonably, and are suitable to be dynamic models of the human-structure coupling system. To predict the influence of the human motion state on the human-structure interaction, the motion equation of the coupled system needs to be established first
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