A Study on the Prediction of Floor Impact Vibration Induced by Foot Steps

• Main Authors: Lin ,Fang Ming, 林芳銘
• Other Authors: Chiang,Che Ming
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/37008846467057516771

博士 === 國立成功大學 === 建築學系 === 89 === Because of the interior vibration induced by working people and the machinery and the outdoor vibration caused by the traffic and the train, the quality of the building environment and the inhabitant''s health is affected by it. In some specific environment, like microelectronic factory buildings, it is important to control the micro-vibration in the floor to ensure the manufacture. In Taiwan, one of the researches based on impedance method to the field of the floor impact vibration is built many achievements in finding out the influence and reduction factors of the floor vibration. The other one, like using FEM to predict the impact floor vibration , also can be a good prediction method. The research depends on the former research achievements, creates the vibration source of foot steps, and uses the simulation to discuss the characteristics of the floor vibration and micro-vibration. It is also discussed the influences of the structures to floor vibration, including the single and compound constructive floors, the front is common style in Taiwan and the back is used to solve the problems to set up the complicated piping systems in the floor. To establish a more useful predict model, the research compares between simulation results and the measurements of actual structure, and the error-rate is in 10%. Besides, the comparison with the data from the points of measurement and simulation, the R2=0.84 in single constructive floor, and the R2=0.93 in compound constructive floor. They all can prove the research used to predict the floor vibration caused by foot steps is high practicable. After establishing the predict model, the research keeps discussing the influence and the reduction of different structures to floor vibration by the simulation of changing the structure system and the material. The following is the results: 1. After the simulation of changing the distance between beams and the thickness of floor, it can be found that to reduce the distance of beams and increase of floor thickness both improve the vibration values, and to reduce the distance of beams is more effective. 2. By the analysis of the comparison with changing the structure system of raised access floor, it shows the high relationship of the thickness and material of floor panel and the vibration sources, foot steps. With the research, designers can understand the predictions and estimations and use for reduction the floor vibration in planning and designing.