Study on seismic performance upgrading for steel bridge structures by introducing energy-dissipation members

抄録

The seismic performance upgrading effects for steel bridge structures by introducing energy-dissipation members are investigated in this paper. The energy-dissipation members concerned in the present study are shear panel dampers and buckling-restrained braces, which dissipate seismic energy through metallic yielding. This investigation is divided into two parts: (1) an introduction of design details and modeling for energy-dissipation members; (2) a parametric study on seismic responses of various frame-type bridge piers with energy-dissipation members. Three parameters, the strength ratio, stiffness ratio, and displacement ratio, are identified as design criteria to investigate the performance of bridge structures with the energy-dissipation members. Significant seismic performance upgrading effects have been found numerically. The results show that the parameters can be used as key parameters in unified design of such energy-dissipation members.