SHEAR DEFORMATION LIMITING DEVICE FOR ELASTO-PLASTIC DAMPER, ELASTO-PLASTIC DAMPER, AND ELASTO-PLASTIC DAMPER WITH SHEAR DEFORMATION LIMITING FUNCTION

PROBLEM TO BE SOLVED: To securely stop an elasto-plastic damper, which has shear deformation on receiving shear force in an in-plane direction when mutually separated structure members are relatively displaced, from plastically deforming exceeding a certain quantity.SOLUTION: Shear deformation limiting devices 4, 5 for an elasto-plastic damper include a plastic deformation part 31 capable of shear yielding with in-plane shear force in relative displacement between structural members 1, 2, and joint parts 32, 33 located on both sides of the plastic deformation part 31 in a direction perpendicular to a shear force acting direction and joined to the structural members 1, 2, and are each composed, between both the joint parts 32, 33, of one engagement member 41, 51 accommodated in a gap 34, 35 of an elasto-plastic damper 3 having a gap 34, 35 in the direction perpendicular to the shear force acting direction and joined to one structural member 1 and the other engagement member 42, 52 accommodated in the gap 34, 35 and joined to the other structural member 2. A distance in the shear force acting direction is normally secured between the one engagement member 41, 51 and the other engagement member 42, 52, and both the structural members 1, 2 are engaged with each other in relative displacement between both. 【課題】互いに分離した構造部材間の相対変位時に面内方向のせん断力を受けてせん断変形する弾塑性ダンパーの一定量を超える塑性変形を確実に阻止する。【解決手段】構造部材１、２間の相対変位時に面内せん断力によりせん断降伏し得る塑性変形部３１と、せん断力作用方向に垂直な方向の、塑性変形部３１の両側に位置し、各構造部材１、２に接合される接合部３２、３３を備え、両接合部３２、３３間に、せん断力作用方向に垂直な方向に空隙３４、３５を有する弾塑性ダンパー３の空隙３４、３５内に納まり、一方の構造部材１に接合される一方の係合部材４１、５１と、空隙３４、３５内に納まり、他方の構造部材２に接合される他方の係合部材４２、５２からせん断変形制限装置４、５を構成し、一方の係合部材４１、５１と他方の係合部材４２、５２間に平常時にせん断力作用方向に距離を確保し、両構造部材１、２間の相対変位時に両者を互いに係合させる。【選択図】図１