Dog bone type beam-corner column anti-collapse joint for fabricated steel structure

Abstract

The application discloses a dog-bone type beam-corner column anti-collapse node for a fabricated steel structure, the end of a first dog-bone beam and the end of a second dog-bone beam are respectively in contact with two adjacent side faces of a square steel pipe column, the web of a first channel steel is in contact with one side of the web of the first dog-bone beam, the web of a third channel steel is in contact with the other side of the web of the first dog-bone beam, the web of a second channel steel is in contact with one side of the web of the second dog-bone beam, and the web of a fourth channel steel is in contact with the other side of the web of the second dog-bone beam, wherein the first channel steel and the second channel steel are connected through an L-shaped connecting plate, the L-shaped connecting plate is in contact with the outer wall of the square steel pipe column, the third channel steel and the fourth channel steel are connected through a C-shaped steel, and the C-shaped steel is in contact with the outer wall of the square steel pipe column, so that the node can avoid the safety hidden trouble caused by field welding.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of structural engineering and relates to a dog-bone type beam-corner column anti-collapse joint for fabricated steel structures. BACKGROUND

[0002] The progressive collapse of a building structure refers to a large-scale collapse that is out of proportion to the initial damage after the structure is subjected to accidental loads, thereby causing serious consequences. For example, in June 2021, a collapse occurred in an apartment building in Miami, USA, resulting in 98 deaths. Although the probability of progressive collapse of a building structure is very small, the consequences are disastrous, so how to improve the anti-progressive collapse performance of the structure has become a hot issue in the current engineering field. The dog-bone type joint originated from the exploration of researchers for a new type of joint after the 1995 Kobe earthquake in Japan. It is a further application of the "strong joint and weak member" principle. The principle is that the plastic hinge will move to the weakened section after the beam flange is weakened, thereby avoiding premature fracture at the beam end of the joint, so that the joint has better ductility and seismic performance. Existing research shows that the dog-bone type joint not only improves the seismic performance of the structure, but also greatly improves the anti-collapse performance of the structure. Fabricated building structures are widely promoted and applied due to their short construction period, easy installation, green environmental protection and many other advantages. In fabricated building structures, the existing square steel pipe column 1 and I-beam are usually connected by welding on site. At this time, the quality of the weld is an important guarantee for the force of the joint. However, the quality of the welds welded on site is uneven, and it is impossible to control the quality of all joint welds. In addition, a large amount of residual stress caused by welding will also have a great impact on the stress of the structure. Secondly, welding on the construction site will produce an open flame, which has certain safety hazards. Therefore, for fabricated buildings, on-site work should be avoided as much as possible. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art and provide a dog-bone type beam-corner column anti-collapse joint for fabricated steel structures, which can avoid the safety hazards caused by on-site welding.

[0004] To achieve the above purpose, the dog-bone type beam-corner column anti-collapse joint for fabricated steel structures comprises a first dog-bone beam, a second dog-bone beam, a square steel pipe column, a first slot-shaped flange reinforcement connecting piece and a second slot-shaped flange reinforcement connecting piece.

[0005] The end of the first dog bone beam and the end of the second dog bone beam are in contact with two adjacent sides of the square steel pipe column respectively, the first channel-shaped flange reinforcing connecting piece comprises a first channel steel and a second channel steel, the second channel-shaped flange reinforcing connecting piece comprises a third channel steel and a fourth channel steel, wherein the web of the first channel steel is in contact with one side of the web of the first dog bone beam, the web of the third channel steel is in contact with the other side of the web of the first dog bone beam, the web of the second channel steel is in contact with one side of the web of the second dog bone beam, and the web of the fourth channel steel is in contact with the other side of the web of the second dog bone beam, wherein the first channel steel and the second channel steel are connected by an L-shaped connecting plate, the L-shaped connecting plate is in contact with the outer wall of the square steel pipe column, the third channel steel and the fourth channel steel are connected by a C-shaped steel, and the C-shaped steel is in contact with the outer wall of the square steel pipe column.

[0006] The first L-shaped connecting piece, the second L-shaped connecting piece, the third L-shaped connecting piece and the fourth L-shaped connecting piece are further included.

[0007] The first sleeve and the second sleeve are sleeved on the square steel pipe column, wherein the first sleeve is located below the first dog bone beam and the second dog bone beam, the second sleeve is located above the first dog bone beam and the second dog bone beam, the upper side of the first L-shaped connecting piece is located below the lower flange of the first dog bone beam, the lower side of the first L-shaped connecting piece is bent after passing through the space between the first sleeve and the square steel pipe column and extends to the outer wall of the first sleeve, the upper side of the second L-shaped connecting piece is located below the lower flange of the second dog bone beam, the lower side of the second L-shaped connecting piece is bent after passing through the space between the first sleeve and the square steel pipe column and extends to the outer wall of the first sleeve, the lower side of the third L-shaped connecting piece is located above the upper flange of the first dog bone beam, the upper side of the third L-shaped connecting piece is bent after passing through the space between the second sleeve and the square steel pipe column and extends to the outer wall of the second sleeve, and the lower side of the fourth L-shaped connecting piece is located above the upper flange of the second dog bone beam, the upper side of the fourth L-shaped connecting piece is located above the upper flange of the second dog bone beam, and the other side of the fourth L-shaped connecting piece is bent after passing through the space between the second sleeve and the square steel pipe column and extends to the outer wall of the second sleeve.

[0008] The first triangular stress plate, the second triangular stress plate, the third triangular stress plate and the fourth triangular stress plate are further included.

[0009] The first triangular stress plate is located at the bottom of the upper side of the first L-shaped connecting piece, the second triangular stress plate is located at the bottom of the upper side of the second L-shaped connecting piece, the third triangular stress plate is located above the lower side of the third L-shaped connecting piece, and the fourth triangular stress plate is located above the lower side of the fourth L-shaped connecting piece.

[0010] The lower side of the first L-shaped connecting piece is connected with the first sleeve and the square steel pipe column through a first screw rod and a first nut, the lower side of the second L-shaped connecting piece is connected with the first sleeve and the square steel pipe column through a second screw rod and a second nut, the upper side of the third L-shaped connecting piece is connected with the second sleeve and the square steel pipe column through a third screw rod and a third nut, and the upper side of the fourth L-shaped connecting piece is connected with the second sleeve and the square steel pipe column through a fourth screw rod and a fourth nut;

[0011] The lower flange of the first channel steel, the lower flange of the first dog bone beam, the upper side of the first L-shaped connecting piece and the first triangular stress plate are connected through a first bolt and a fifth nut; the lower flange of the second channel steel, the lower flange of the second dog bone beam, the upper side of the second L-shaped connecting piece and the second triangular stress plate are connected through a second bolt and a sixth nut; the upper flange of the first channel steel, the upper flange of the first dog bone beam, the lower side of the third L-shaped connecting piece and the third triangular stress plate are connected through a third bolt and a seventh nut, and the upper flange of the second channel steel, the upper flange of the second dog bone beam, the lower side of the fourth L-shaped connecting piece and the fourth triangular stress plate are connected through a fourth bolt and an eighth nut;

[0012] The fifth screw rod passes through the first triangular stress plate, the upper side of the first L-shaped connecting piece, the lower flange of the first dog bone beam, the lower flange of the first channel steel, the upper flange of the first channel steel, the upper flange of the first dog bone beam, the lower side of the third L-shaped connecting piece and the third triangular stress plate in sequence;

[0013] The sixth screw rod passes through the second triangular stress plate, the upper side of the second L-shaped connecting piece, the lower flange of the second dog bone beam, the lower flange of the second channel steel, the upper flange of the second channel steel, the upper flange of the second dog bone beam, the lower side of the fourth L-shaped connecting piece and the fourth triangular stress plate in sequence;

[0014] The seventh screw rod passes through the first triangular stress plate, the upper side of the first L-shaped connecting piece, the lower flange of the first dog bone beam, the lower flange of the third channel steel, the upper flange of the third channel steel, the upper flange of the first dog bone beam and the lower side of the third L-shaped connecting piece and the third triangular stress plate in sequence;

[0015] The eighth screw rod passes through the second triangular stress plate, the upper side of the second L-shaped connecting piece, the lower flange of the second dog bone beam, the upper flange of the fourth channel steel, the upper flange of the fourth channel steel, the upper flange of the second dog bone beam, the lower side of the fourth L-shaped connecting piece and the fourth triangular stress plate in sequence;

[0016] The fifth screw rod is sleeved with a first compression spring, and the first compression spring is located between the upper flange and the lower flange of the first channel steel;

[0017] The sixth screw rod is sleeved with a second compression spring, and the second compression spring is located between the upper flange and the lower flange of the second channel steel;

[0018] The seventh screw is sleeved with a third compression spring, and the third compression spring is located between the upper flange and the lower flange of the third channel steel.

[0019] The eighth screw is sleeved with a fourth compression spring, and the fourth compression spring is located between the upper flange and the lower flange of the fourth channel steel.

[0020] The first compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the first dog bone beam, the second compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the second dog bone beam, the third compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the first dog bone beam, and the fourth compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the second dog bone beam.

[0021] The L-shaped connecting plate, the C-shaped steel and the square steel pipe column are connected through the ninth screw and the ninth nut.

[0022] The present application has the following beneficial effects:

[0023] The dog bone type beam-corner column anti-collapse node for the fabricated steel structure has the beneficial effects that the end of the first dog bone beam and the end of the second dog bone beam are in contact with two adjacent side faces of the square steel pipe column, the second dog bone beam, the first dog bone beam and the square steel pipe column are connected through the first channel flange reinforcing connector and the second channel flange reinforcing connector, the fabricated structure is adopted, and the safety hidden danger caused by field welding is avoided. Meanwhile, based on the concept of “weakening first and then reinforcing” of the dog bone type node, the anti-collapse performance of the node is further improved, and the node is suitable for the current fabricated building structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The present application has the following beneficial effects:

[0025] Figure 2 The present application has the following beneficial effects:

[0026] Figure 3 The present application has the following beneficial effects:

[0027] Figure 4 The present application has the following beneficial effects:

[0028] Figure 5 The present application has the following beneficial effects:

[0029] Figure 6 The present application has the following beneficial effects:

[0030] Wherein, 1 is square steel pipe column, 21 is first dog bone beam, 22 is second dog bone beam, 31 is first L-shaped connecting piece, 32 is second L-shaped connecting piece, 33 is third L-shaped connecting piece, 34 is fourth L-shaped connecting piece, 41 is first sleeve, 42 is second sleeve, 51 is first triangular stress plate, 52 is second triangular stress plate, 53 is third triangular stress plate, 54 is fourth triangular stress plate, 6 is first channel-shaped flange strengthening connecting piece, and 7 is second channel-shaped flange strengthening connecting piece. DETAILED DESCRIPTION

[0031] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0032] In the drawings, the structural schematic diagram according to the disclosed embodiments of the present application is shown. These drawings are not drawn to scale, in which some details are enlarged for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers and their relative size, position relationship shown in the drawings are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and the regions / layers with different shapes, sizes, relative positions can be additionally designed by those skilled in the art according to actual needs.

[0033] Reference Figures 1 to 6 The dog bone type beam-corner column anti-collapse node for fabricated steel structure described in the present application includes square steel pipe column 1, first dog bone beam 21, second dog bone beam 22, first L-shaped connecting piece 31, second L-shaped connecting piece 32, third L-shaped connecting piece 33, fourth L-shaped connecting piece 34, first sleeve 41, second sleeve 42, first triangular stress plate 51, second triangular stress plate 52, third triangular stress plate 53, fourth triangular stress plate 54, first channel-shaped flange strengthening connecting piece 6, and second channel-shaped flange strengthening connecting piece 7.

[0034] The end of the first dog bone beam 21 and the end of the second dog bone beam 22 are in contact with two adjacent sides of the square steel pipe column 1, the first channel-shaped flange reinforcing connector 6 comprises a first channel steel and a second channel steel, the second channel-shaped flange reinforcing connector 7 comprises a third channel steel and a fourth channel steel, wherein the web of the first channel steel is in contact with one side of the web of the first dog bone beam 21, the web of the third channel steel is in contact with the other side of the web of the first dog bone beam 21, the web of the second channel steel is in contact with one side of the web of the second dog bone beam 22, and the web of the fourth channel steel is in contact with the other side of the web of the second dog bone beam 22, wherein the first channel steel and the second channel steel are connected by an L-shaped connecting plate, wherein the L-shaped connecting plate is in contact with the outer wall of the square steel pipe column 1, the third channel steel and the fourth channel steel are connected by a C-shaped steel, and the C-shaped steel is in contact with the outer wall of the square steel pipe column 1;

[0035] The square steel pipe column 1 is sleeved with a first sleeve 41 and a second sleeve 42, wherein the first sleeve 41 is located below the first dog bone beam 21 and the second dog bone beam 22, the second sleeve 42 is located above the first dog bone beam 21 and the second dog bone beam 22, the upper side of the first L-shaped connector 31 is located below the lower flange of the first dog bone beam 21, the lower side of the first L-shaped connector 31 is bent after passing through the space between the first sleeve 41 and the square steel pipe column 1 and extends to the outer wall of the first sleeve 41, the upper side of the second L-shaped connector 32 is located below the lower flange of the second dog bone beam 22, the lower side of the second L-shaped connector 32 is bent after passing through the space between the first sleeve 41 and the square steel pipe column 1 and extends to the outer wall of the first sleeve 41, the lower side of the third L-shaped connector 33 is located above the upper flange of the first dog bone beam 21, the upper side of the third L-shaped connector 33 is bent after passing through the space between the second sleeve 42 and the square steel pipe column 1 and extends to the outer wall of the second sleeve 42, and the lower side of the fourth L-shaped connector 34 is located above the upper flange of the second dog bone beam 22, the upper side of the fourth L-shaped connector 34 is located above the upper flange of the second dog bone beam 22, and the other side of the fourth L-shaped connector 34 is bent after passing through the space between the second sleeve 42 and the square steel pipe column 1 and extends to the outer wall of the second sleeve 42;

[0036] The first triangular stress plate 51 is located at the bottom of the upper side of the first L-shaped connector 31, the second triangular stress plate 52 is located at the bottom of the upper side of the second L-shaped connector 32, the third triangular stress plate 53 is located above the lower side of the third L-shaped connector 33, and the fourth triangular stress plate 54 is located above the lower side of the fourth L-shaped connector 34;

[0037] The lower side of the first L-shaped connecting piece 31 is connected with the first sleeve 41 and the square steel pipe column 1 through a first screw rod and a first nut, the lower side of the second L-shaped connecting piece 32 is connected with the first sleeve 41 and the square steel pipe column 1 through a second screw rod and a second nut, the upper side of the third L-shaped connecting piece 33 is connected with the second sleeve 42 and the square steel pipe column 1 through a third screw rod and a third nut, and the upper side of the fourth L-shaped connecting piece 34 is connected with the second sleeve 42 and the square steel pipe column 1 through a fourth screw rod and a fourth nut;

[0038] The lower flange of the first channel steel, the lower flange of the first dog bone beam 21, the upper side of the first L-shaped connecting piece 31 and the first triangular stress plate 51 are connected through a first bolt and a fifth nut; the lower flange of the second channel steel, the lower flange of the second dog bone beam 22, the upper side of the second L-shaped connecting piece 32 and the second triangular stress plate 52 are connected through a second bolt and a sixth nut; the upper flange of the first channel steel, the upper flange of the first dog bone beam 21, the lower side of the third L-shaped connecting piece 33 and the third triangular stress plate 53 are connected through a third bolt and a seventh nut, and the upper flange of the second channel steel, the upper flange of the second dog bone beam 22, the lower side of the fourth L-shaped connecting piece 34 and the fourth triangular stress plate 54 are connected through a fourth bolt and an eighth nut;

[0039] The fifth screw rod passes through the first triangular stress plate 51, the upper side of the first L-shaped connecting piece 31, the lower flange of the first dog bone beam 21, the lower flange of the first channel steel, the upper flange of the first channel steel, the upper flange of the first dog bone beam 21, the lower side of the third L-shaped connecting piece 33 and the third triangular stress plate 53 in sequence;

[0040] The sixth screw rod passes through the second triangular stress plate 52, the upper side of the second L-shaped connecting piece 32, the lower flange of the second dog bone beam 22, the lower flange of the second channel steel, the upper flange of the second channel steel, the upper flange of the second dog bone beam 22, the lower side of the fourth L-shaped connecting piece 34 and the fourth triangular stress plate 54 in sequence;

[0041] The seventh screw rod passes through the first triangular stress plate 51, the upper side of the first L-shaped connecting piece 31, the lower flange of the first dog bone beam 21, the lower flange of the third channel steel, the upper flange of the third channel steel, the upper flange of the first dog bone beam 21, the lower side of the third L-shaped connecting piece 33 and the third triangular stress plate 53 in sequence;

[0042] The eighth screw rod passes through the second triangular stress plate 52, the upper side of the second L-shaped connecting piece 32, the lower flange of the second dog bone beam 22, the upper flange of the fourth channel steel, the upper flange of the fourth channel steel, the upper flange of the second dog bone beam 22, the lower side of the fourth L-shaped connecting piece 34 and the fourth triangular stress plate 54 in sequence;

[0043] The fifth screw rod is sleeved with a first compression spring, and the first compression spring is located between the upper flange and the lower flange of the first channel steel;

[0044] The sixth screw is sleeved with a second compression spring, and the second compression spring is located between the upper flange and the lower flange of the second channel steel.

[0045] The seventh screw is sleeved with a third compression spring, and the third compression spring is located between the upper flange and the lower flange of the third channel steel.

[0046] The eighth screw is sleeved with a fourth compression spring, and the fourth compression spring is located between the upper flange and the lower flange of the fourth channel steel.

[0047] The first compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the first dog bone beam 21; the second compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the second dog bone beam 22; the third compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the first dog bone beam 21; and the fourth compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the second dog bone beam 22.

[0048] The L-shaped connecting plate, the C-shaped steel and the square steel pipe column 1 are connected through the ninth screw and the ninth nut.

[0049] The specific construction process of the present application is as follows:

[0050] The components are prefabricated in the factory, then transported to the construction site, and then connected through the first screw, the second screw, the third screw, the fourth screw, the fifth screw, the sixth screw, the seventh screw, the eighth screw, the ninth screw, the first nut, the second nut, the third nut, the fourth nut, the fifth nut, the sixth nut, the seventh nut, the eighth nut, the ninth nut, the first bolt, the second bolt, the third bolt and the fourth bolt.

[0051] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A dog-bone beam-to-column anti-collapse node for fabricated steel structures, characterized by, The first dog bone beam (21), the second dog bone beam (22), the square steel pipe column (1), the first slot-shaped flange reinforcing connecting piece (6) and the second slot-shaped flange reinforcing connecting piece (7) are included. The end of the first dog bone beam (21) and the end of the second dog bone beam (22) are in contact with two adjacent sides of the square steel pipe column (1), the first slot-shaped flange reinforcing connecting piece (6) includes a first channel steel and a second channel steel, the second slot-shaped flange reinforcing connecting piece (7) includes a third channel steel and a fourth channel steel, wherein the web of the first channel steel is in contact with one side of the web of the first dog bone beam (21), the web of the third channel steel is in contact with the other side of the web of the first dog bone beam (21), the web of the second channel steel is in contact with one side of the web of the second dog bone beam (22), and the web of the fourth channel steel is in contact with the other side of the web of the second dog bone beam (22), wherein the first channel steel and the second channel steel are connected by an L-shaped connecting plate, the L-shaped connecting plate is in contact with the outer wall of the square steel pipe column (1), the third channel steel and the fourth channel steel are connected by a C-shaped steel, and the C-shaped steel is in contact with the outer wall of the square steel pipe column (1). The first L-shaped connecting piece (31), the second L-shaped connecting piece (32), the third L-shaped connecting piece (33) and the fourth L-shaped connecting piece (34) are further included. The square steel pipe column (1) is sleeved with a first sleeve (41) and a second sleeve (42), wherein the first sleeve (41) is located below the first dog bone beam (21) and the second dog bone beam (22), the second sleeve (42) is located above the first dog bone beam (21) and the second dog bone beam (22), the upper side of the first L-shaped connecting piece (31) is located below the lower flange of the first dog bone beam (21), the lower side of the first L-shaped connecting piece (31) is bent after passing through the space between the first sleeve (41) and the square steel pipe column (1) and extends to the outer wall of the first sleeve (41), the upper side of the second L-shaped connecting piece (32) is located below the lower flange of the second dog bone beam (22), the lower side of the second L-shaped connecting piece (32) is bent after passing through the space between the first sleeve (41) and the square steel pipe column (1) and extends to the outer wall of the first sleeve (41), the lower side of the third L-shaped connecting piece (33) is located above the upper flange of the first dog bone beam (21), the upper side of the third L-shaped connecting piece (33) is bent after passing through the space between the second sleeve (42) and the square steel pipe column (1) and extends to the outer wall of the second sleeve (42), and the lower side of the fourth L-shaped connecting piece (34) is located above the upper flange of the second dog bone beam (22), the upper side of the fourth L-shaped connecting piece (34) is bent after passing through the space between the second sleeve (42) and the square steel pipe column (1) and extends to the outer wall of the second sleeve (42). The first triangular stress plate (51), the second triangular stress plate (52), the third triangular stress plate (53) and the fourth triangular stress plate (54) are further included. The first triangular stress plate (51) is located at the bottom of the upper side of the first L-shaped connecting piece (31), the second triangular stress plate (52) is located at the bottom of the upper side of the second L-shaped connecting piece (32), the third triangular stress plate (53) is located above the lower side of the third L-shaped connecting piece (33), and the fourth triangular stress plate (54) is located above the lower side of the fourth L-shaped connecting piece (34); The lower side of the first L-shaped connecting piece (31) is connected with the first sleeve (41) and the square steel pipe column (1) through the first screw rod and the first nut; The upper side of the third L-shaped connecting piece (33) is connected with the second sleeve (42) and the square steel pipe column (1) through the third screw rod and the third nut; The fifth screw rod passes through the first triangular stress plate (51), the upper side of the first L-shaped connecting piece (31), the lower flange of the first dog bone beam (21), the lower flange of the first channel steel, the upper flange of the first channel steel, the upper flange of the first dog bone beam (21), the lower side of the third L-shaped connecting piece (33) and the third triangular stress plate (53) in sequence; The seventh screw rod passes through the first triangular stress plate (51), the upper side of the first L-shaped connecting piece (31), the lower flange of the first dog bone beam (21), the lower flange of the third channel steel, the upper flange of the third channel steel, the upper flange of the first dog bone beam (21), the lower side of the third L-shaped connecting piece (33) and the third triangular stress plate (53) in sequence.

2. The dog-bone beam-to-column collapse-resistant node for fabricated steel structures according to claim 1, characterized in that, The lower side of the second L-shaped connecting piece (32) is connected with the first sleeve (41) and the square steel pipe column (1) through the second screw rod and the second nut, and the upper side of the fourth L-shaped connecting piece (34) is connected with the second sleeve (42) and the square steel pipe column (1) through the fourth screw rod and the fourth nut.

3. The dog-bone beam-to-column collapse-resistant node for fabricated steel structures of claim 1, wherein, The lower flange of the first channel steel, the lower flange of the first dog bone beam (21), the upper side of the first L-shaped connecting piece (31) and the first triangular stress plate (51) are connected through the first bolt and the fifth nut; the lower flange of the second channel steel, the lower flange of the second dog bone beam (22), the upper side of the second L-shaped connecting piece (32) and the second triangular stress plate (52) are connected through the second bolt and the sixth nut; the upper flange of the first channel steel, the upper flange of the first dog bone beam (21), the lower side of the third L-shaped connecting piece (33) and the third triangular stress plate (53) are connected through the third bolt and the seventh nut, and the upper flange of the second channel steel, the upper flange of the second dog bone beam (22), the lower side of the fourth L-shaped connecting piece (34) and the fourth triangular stress plate (54) are connected through the fourth bolt and the eighth nut.

4. The dog-bone shaped beam-to-column collapse resistant node for prefabricated steel structures according to claim 1, characterized in that, The sixth screw rod passes through the second triangular stress plate (52), the upper side of the second L-shaped connecting piece (32), the lower flange of the second dog bone beam (22), the lower flange of the second channel steel, the upper flange of the second channel steel, the upper flange of the second dog bone beam (22), the lower side of the fourth L-shaped connecting piece (34) and the fourth triangular stress plate (54); The eighth screw rod passes through the second triangular stress plate (52), the upper side of the second L-shaped connecting piece (32), the lower flange of the second dog bone beam (22), the lower flange of the fourth channel steel, the upper flange of the fourth channel steel, the upper flange of the second dog bone beam (22), the lower side of the fourth L-shaped connecting piece (34) and the fourth triangular stress plate (54) in sequence.

5. The dog-bone beam-to-column collapse-resistant node for fabricated steel structures according to claim 4, characterized in that, The fifth screw rod is sleeved with a first compression spring between the upper flange and the lower flange of the first channel steel; The sixth screw rod is sleeved with a second compression spring between the upper flange and the lower flange of the second channel steel; The seventh screw rod is sleeved with a third compression spring between the upper flange and the lower flange of the third channel steel; The eighth screw rod is sleeved with a fourth compression spring between the upper flange and the lower flange of the fourth channel steel.

6. The dog-bone beam-to-column collapse-resistant node for fabricated steel structures of claim 5, wherein, The first compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the first dog bone beam (21); the second compression spring is opposite to the notch on one side of the upper flange and the notch on one side of the lower flange of the second dog bone beam (22); the third compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the first dog bone beam (21); and the fourth compression spring is opposite to the notch on the other side of the upper flange and the notch on the other side of the lower flange of the second dog bone beam (22).

7. The dog-bone shaped beam-to-column collapse resistant node for prefabricated steel structures according to claim 1, characterized in that, The L-shaped connecting plate, the C-shaped steel and the square steel pipe column (1) are connected through the ninth screw rod and the ninth nut.

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