Aiming at the floor comfort of the long-span corridor structure,the comprehensive finite element model of the corridor is established,and the modal analysis of the structure is carried out by Ritz vector method.The vibration characteristics of the long-span corridor structure are studied and the vibration reduction design is analyzed.According to different crowd densities and walking frequencies,the vertical vibrations of the floor under four kinds of crowd loading are studied,and the vertical accelerations of the corridor structure before and after TMD installation are compared.The results indicate that the natural vibration frequency of the corridor is close to the walking frequency.Under the excitation of random pedestrian loads,the corridor exhibits resonance,leading to significant vibrations that can cause discomfort to occupants.Hence,it is necessary to implement measures to control and mitigate vibrations.By setting TMD in a reasonable position of the corridor,the overall vibration reduction rate is as high as 67.4%.The vibration of the floor can meet the human comfort requirements,which indicates that TMD plays an effective role in vibration regulation.
关键词
大跨度连廊/调频质量阻尼器/振动控制/人致振动/人体舒适度
Key words
large-span corridor/tuned mass damper/vibration control/human-induced vibration/human comfort
维普
万方数据