Analysis on vibration response of structures under crowd jumping considering synergistic characteristics
To accurately predict the vibration response of large-span floor structures under the excitation of crowd jumping,the probability density characteristics of synergistic factor of crowd jumping load were stud-ied.Based on the single half-sine-square jumping load model,a crowd jumping load model considering the crowd synergistic characteristics was established.The variation rule of the dynamic parameters and acceleration response of the floor structure under the action of crowd jumping was calculated and analyzed based on the bio-mechanical model of the human body.The study results show that compared with the fully synchronized crowd jump excitation,the structural vibration acceleration response decreases significantly under the crowd jump ex-citation considering the time lag factor,with the peak acceleration reduction reaching as high as 77.33％.The effect of human-structure interaction on the peak acceleration response of the structure is more pronounced with the increase in the number of people,where the relative reduction in the peak acceleration response of the floor structure under the jumping excitation of 9 persons is 6.83％.The results provide reference for the analysis and evaluation of human-induced vibration response of large-span floor structures.
万方数据
维普
