Abstract:A triple-tower suspension bridge, Tai Zhou Bridge, was taken as an example and three kinds of vibration-reduction measures were analyzed in detail, including links between the mid-tower and the girders, viscous dampers between the towers and the girders,and links plus viscous dampers. The links and viscous da mpers increase the stiffness and damping ratio to cut down the seis mic response of bridge. The results show that the links between mid-tower and girders and viscous dampers can decrease the longitudinal displacement of girders and the vibration of girders decreases quicklys. The measures of links plus visc ou s dampers have a marked effect on suppressing seismic displacement response of t he bridge than the others. Compared with the fully floating system, the above me asures increase the structural internal force of some members of the bridge and the measure of installing links between the mid-tower and gird ers leads to bigger structural internal force than others.