両端に座屈拘束型ダンパーを組込んだ長尺制震ブレースの設計法 : その1 座屈拘束条件式の導出

抄録

Authors have devised a seismic response control brace, which is available for structures having longer diagonal braces often appeared in supporting structures of industrial equipments. This brace is composed of an ordinary axial force member as intermediate member and two axial hysteresis dampers provided with buckling restraint tube at its both ends. In this paper, the buckling restraint conditions of the brace with the damper are formulated by developing the beam-column theory considering initial deflection of the brace and a small gap between the damper core and buckling restraint tube. At .the same time, stress analysis is carried out on the connection of the brace to the framing joints considering the deformation of connection members and rotational spring constants of the joints. And, effects of the various design parameters for the buckling restraint conditions are discussed.