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Evaluation of floor vibration in an existing building

Semerdöken, Yavuz
Vibration serviceability is a major concern in the design of lighter floor systems of newer buildings. Floor vibrations due to walking and rhythmic movements of the occupants should not exceed threshold levels for the comfort of occupants and the protection of sensitive equipment in the buildings. The objective of this study is to evaluate the floor vibration problem reported in a six-story reinforced concrete with two basement floors office building. First, structural system dynamic properties of the building were identified using its available ambient vibration records. The finite element model of the building was developed and calibrated to match the identified natural vibration frequencies. Then, the vibration records of the floors at which the problem was reported were analyzed to examine if threshold levels stipulated in design codes had been exceed. Finally, finite element simulations and the in-situ floor vibration data for the floor response due to walking of the occupants were compared with the threshold levels recommended in the AISC Floor Vibrations Due to Human Activity.