COMPARISON OF METHODS FOR EXPANDING SINGLE FOOTFALL TRACE IN 3D DYNAMIC WALKING LOAD EXPERIMENT

摘要

Human-induced load refers to the forces imposed on the supporting structures or members due to occupant's activities like walking,running,jumping,dancing and so forth. Among them,walking load is of the greatest importance since walking is the basic activity of structure occupants. To understand dynamic properties of walking load is essential for predicting the vibration performance of structures. In walking load experiment that utilizing force plates,we can only obtain limited number of continuous single footfall trace owing to the limitation of force plate amount. In order to further analyze the dynamic properties of human-induced walking load,the method and criterion chosen to expand the single footfall trace to a continuous time history cast a significant influence on the dynamic property studies. However,few studies mention the expanding method for single footfall trace and research on the validity of the expanding method is even more limited. Accordingly,we carried on a series of walking load experiment by three-dimension motion analysis system and gathered a large amount of single footfall traces in this study. On the basis of experimental data,we systematically compare and analyze the current expanding method and its sensitiveness to computational parameters. Finally,we are able to provide some suggestions for selecting proper method under different experimental conditions.