Cover plate type friction energy dissipation steel frame column base joint: Fid-Bau Portal

Cover plate type friction energy dissipation steel frame column base joint

HE DONGBING / LI CHENGYU

The invention discloses a cover plate type friction energy dissipation steel frame column base joint, and relates to the field of building structures, the cover plate type friction energy dissipation steel frame column base joint comprises an upper H-shaped steel column and a lower H-shaped steel column, the upper H-shaped steel column and the lower H-shaped steel column are spliced together by high-strength bolts through an outer cover plate, an inner cover plate and a front cover plate, a large round hole is formed in a web plate of the upper H-shaped steel column, and a small round hole is formed in a web plate of the lower H-shaped steel column. A long slotted hole is formed in the flange of the upper H-shaped steel column, round holes corresponding to the high-strength bolts are formed in the web and the flange of the lower H-shaped steel column, washers used by the high-strength bolts are butterfly-shaped washers, the loss of pretightening force of the bolts can be prevented, the lower H-shaped steel column is connected with the column bottom plate in a welded mode, and due to the fact that the long slotted hole is formed in the flange of the upper H-shaped steel column and the large round hole is formed in the web of the upper H-shaped steel column. Under the action of an earthquake, friction slippage occurs between the upper H-shaped steel column and the outer cover plate, the inner cover plate and the front cover plate.

本发明公开了一种盖板式摩擦耗能钢框架柱脚节点，涉及建筑结构领域，该盖板式摩擦耗能钢框架柱脚节点包括上H型钢柱和下H型钢柱，上H型钢柱和下H型钢柱通过外盖板、内盖板、前盖板用高强螺栓拼接在一起，上H型钢柱腹板处开有大圆孔，上H型钢柱翼缘处开有长槽孔，下H型钢柱腹板与翼缘处均开与高强螺栓对应的圆孔，高强螺栓使用的垫圈为蝶形垫圈，可以防止螺栓预紧力的损失，下H型钢柱与柱底板采用焊接的方式连接，因为上H型钢柱翼缘开有长槽孔和腹板处的大圆孔，在地震作用下上H型钢柱与外盖板、内盖板、前盖板之间就会发生摩擦滑移。

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