FLOOR VIBRATION CONTROL BY CONSIDERING HUMAN-STRUCTURE INTERACTION
Fan Jiansheng, Li Quan, Li Quanwang, Nie Jianguo
Department of Civil Engineering, Key Laboratory Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing 100084, China
Abstract：This paper presents the application of multiple tuned mass dampers (MTMD) for the control of excessive vibration of long-span floor due to human motions, respectively considering the human-structure interaction or not. In the analysis model, each stationary human, as well as each TMD, is attached into the single degree of freedom (SDF) system representative of the controlled vibration mode of floor as an SDF system. The coupled motion equation of human-floor-MTMD system is presented and the acceleration response expressed by non-dimensional values is obtained by Fourier transform and static condensation method. The optimum values of MTMD design parameters (frequency ratios and damping ratios) are detected based on the minimization of the acceleration response of floor for various MTMD total mass ratios and floor damping ratios by genetic algorithm. And then the comparison of vibration control efficiency between the floors considering human-structure interaction and not is presented, putting forward the recommendation for the design of MTMD system adopted to the floor with human-structure interaction. Additionally, de-tuning effects of MTMD system due to variations of floor controlled modal mass, controlled modal frequency and MTMD damping ratios are studied. Finally, the design guide for MTMD system considering de-tuning effects is developed.
2010, Vol. 29 
