In recent years

the large station rooms were built all around the country

and most of the floors in these structures have the properties of long-span

light weight and low damping.Based on the consideration of human comfort

these floors are analyzed on its vibration serviceability.Firstly

a finite element model of a large station room is established

and the vibration properties of the long-span floors in this structure are studied.Secondly

the vibration serviceability of the floor structure caused by some disadvantageous cases is analyzed.Finally

a design method with multiple tuned mass dampers（MTMD） system is presented.The study results show that the MTMD system can control the vertical vibration of the long-span floor effectively

and the average attenuation rate under various working conditions is about 34%and the human comfort requirement under pedestrian excitation is satisfied.