Research on Application of Viscous Dampers in Continuous Steel Truss Gieder with Flexible Arch

Abstract

The seismic response of a continuous steel truss girder with flexible arch is studied in this paper by using the nonlinear time history analysis method, which including the shear force, the bending moment at the bottom of piers, and the axial force of the arch, the relative displacement between superstructure and piers. Combined with the structural characteristics, the damping effect is studied after setting viscous dampers. The parametric sensitivity of damping coefficient <italic>C</italic> and speed index <italic>z</italic> are analyzed and the reasonable value of <italic>C</italic> and <italic>z</italic> are discussed. The analysis results show that the ideal damping effect is obtained after the viscous dampers are installed. The reduction of the relative displacement between superstructure and piers are above 65.0%. The maximal value of bending moment at the bottom of the pier and the axial force of the arch can decrease respectively by 25.82% and 28.78%.