2005 年 70 巻 597 号 p. 135-143
A new type of seismic beam-end splice is proposed which uses a hysteretic damper as the splice element at the bottom flange of the beam. The design intent of this beam-end splice is to concentrate plastic deformation of the beam to a replaceable damper-and-splice element while limiting damage to the concrete slab. Non-degrading hysteretic characteristics of the damper-and-splice element is achieved by adequate buckling restraints. Based on axial loading tests of the damper-and-splice element and simple mechanics, design equation for the buckling restraints were established. Beam-column subassemblages implementing the proposed beam-end splice exhibited excellent cyclic loading behavior. Concerns regarding web crippling of the beam directly below the top flange splice are addressed.