An assembled self-recovery circular concrete-filled steel-tube composite joint, comprising a circular steel-tube column (1) and H-shaped steel beams (2), wherein steel bars (9) penetrate through the circular steel-tube column (1) which comprises an upper steel-tube column section (3), a central inserted-connection column section (4) and a lower steel-tube column section (5);
- the upper steel-tube column section (3) is connected with the central inserted-connection column section (4) through an upper sleeve connector (6), and the central inserted-connection column section (4) is connected with the lower steel-tube column section (5) through a lower sleeve connector (7);
- steel bar fixing plates (8) are fixed to an upper end of the upper steel-tube column section (3) and a lower end of the lower steel-tube column section (5), are centrally provided with through holes, and are provided with steel bar holes around the through holes, and the steel bars (9) sequentially penetrate through the steel bar fixing plate (8) at the upper end of the upper steel-tube column section (3), the circular steel-tube column section (1), and the steel bar fixing plate (8) at the lower end of the lower steel-tube column section (5);
- the upper sleeve connector (6) comprises a circular tube (10), a connecting ring plate (11) and an insertion plate (12), wherein a diameter of the circular tube (10) is smaller than that of the circular steel-tube column (1), the connecting ring plate (11) is arranged in a middle of the circular tube (10) and comprises at least two end plates (13), and the insertion plate (12) is fixed below the end plates (13) and is vertically connected with the circular tube (10) and the end plates (13);
- the lower sleeve connector (7) is symmetrical with the upper sleeve connector (6) in structure with an insertion plate (12) fixed above end plates (13);
- an upper end and a lower end of the central inserted-connection column section (4) are provided with slots (14) matched with the insertion plates (12);
- a middle of a web at an end, connected to the circular steel-tube column section (1), of each said H-shaped steel beam (2) is provided with a protrusive plate (15), wherein a distance between an upper edge of the protrusive plate (15) and an upper flange of the H-shaped steel beam (2) is not less than a height of the insertion plate (12) of the upper sleeve connector (6), and a distance between a lower edge of the protrusive plate (15) and a lower flange of the H-shaped steel beam (2) is not less than a height of the insertion plate (12) of the lower sleeve connector (7);
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- the circular tube (10) on an upper half of the upper sleeve connector (6) is inserted into the upper steel-tube column section (3), and the insertion plate (12) of the upper sleeve connector (6) is inserted into the slot (14) in the upper end of the central inserted-connection column section (4);
- a the circular tube (10) on a lower half of the lower sleeve connector (7) is inserted into the lower steel-tube column section (5), and the insertion plate (12) of the lower sleeve connector (7) is inserted into the slot (14) in the lower end of the central inserted-connection column section (4);
- the protrusive plates (15) of the H-shaped steel beams (2) are inserted between the insertion plate (12) of the upper sleeve connector (6) and the insertion plate (12) of the lower sleeve connector (7), the insertion plates (12) are connected with two sides of each said protrusive plate (15) in an overlapped manner through web connecting plates (16), the upper flanges of the H-shaped steel beams (2) are connected with the end plates (13) of the upper sleeve connector (6) in an overlapped manner through flange connecting plates (17), and the lower flanges of the H-shaped steel beams (2) are connected with the end plates (13) of the lower sleeve connector (7) in an overlapped manner through flange connecting plates (17).