Abstract
This chapter addresses new considerations in the design of plated structural members; such as box girders, plate girders, and shear-type hysteretic dampers; constructed in regions of high seismic risk. The topics discussed include the stiffener design methodology and stability, and ductility design of plated members predominantly loaded in shear. The ultimate shear behavior is investigated through experiments of three one-quarter scale, steel box girders. Consequently, extensive numerical studies are carried on practical box and plate girders with key structural parameters varied over broad ranges. From the obtained results, reliable methods for estimating the shear and ductility capacities of plated members are presented. These methods can suitably be implemented in future seismic design specifications. Finally, based on the experimental and numerical investigations, suggestions for a seismic design of box girders, plate girders, and hysteretic dampers are made. The proposed empirical formula can also be used to evaluate the ductility capacity of existing plated members. In combined shear-bending loading cases, the strength prediction method developed for the pure shear case still forms the design basis.
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