JOINT STRUCTURE BETWEEN SEISMIC ISOLATOR AND STEEL PIPE COLUMN

To provide a joint structure of a seismic isolator and a steel pipe column which can efficiently transmit stress and facilitates construction.SOLUTION: A joint structure of a seismic isolator 4A and a steel pipe column 51 includes a seismic isolator 4A having an upper flange plate 42 and a lamination rubber part 43 joined to the lower side of the upper flange plate 42, and a steel pipe column 51 that is provided on the upper side of the seismic isolator 4A and whose lower end is welded to a column base plate 54, wherein the column base plate 54 is formed of a steel material having a thickness T1 which is equal to or more than 1.5 times a thickness T2 of the upper flange plate 42 and is 40 mm or more, and a diameter D2 or a diagonal dimension of the lamination rubber part 43 is larger than an outside dimension D1 of the steel pipe column 51 by 200 mm or more, and the column base plate 54 and the upper flange plate 42 are bolt-joined to each other.SELECTED DRAWING: Figure 1 【課題】応力を効率的に伝達可能で、かつ施工が容易な免震装置と鋼管柱との接合構造を提供する。【解決手段】免震装置４Ａと鋼管柱５１との接合構造は、上部フランジプレート４２、及び上部フランジプレート４２の下に接合される積層ゴム部４３を有する免震装置４Ａと、免震装置４Ａの上方に設けられ、下端に柱ベースプレート５４が溶接された鋼管柱５１と、を備え、柱ベースプレート５４は、上部フランジプレート４２の厚さＴ２の１.５倍以上の厚さＴ１で、かつ厚さ４０ｍｍ以上の鋼材で形成され、積層ゴム部４３の直径Ｄ２または対角寸法は、鋼管柱５１の外形寸法Ｄ１より２００ｍｍ以上大きく、柱ベースプレート５４と上部フランジプレート４２がボルト接合されている。【選択図】図１