The self-anchored steel truss suspension bridge

with span of 408 m

floors of deck

has two main cables three-dimensionally distributed.Based on the particular dynamic characteristic of self-anchored suspension bridge

the viscous dampers are proposed to install between the deck and the anchor（auxiliary） piers to improve the transverse seismic response of the bridge structure.In the viscous damped energy-dissipated earthquake-reduction design scheme

the law how to choose damp exponent and how to choose optimal damp coefficient according to mechanical equation of the deck have been proposed.In addition

the results of analysis show that the initial stiffness of the structure can be enhanced and the transverse earthquake effect of the bridge can be reduced effectively by the simultaneous application of viscous damper and its shunt-wound spring

as can be used as reference for engineering practice.