CN108104270A - A kind of clod wash multi-cavity steel tube concrete Special-Shaped Column and the rigid joint of H profile steel beam - Google Patents

Abstract

The invention provides a rigid node of cold-formed multi-cavity steel pipe concrete special-shaped columns and H-shaped steel beams. The processing technology adopts cold bending and welding to process thin-walled steel plates into core column steel pipes of special-shaped columns, and then takes it as the center. Use the side of the column as the connection surface of the column limb, weld the cold-formed U-shaped components in sequence, and then weld the flange connection plate and short steel beam on the column steel pipe at the end. After the above prefabricated components are completed, they will be transported to the site as a whole and completed. It is spliced and assembled with the frame beams, and then filled with concrete in the cavities of these pipes to obtain the rigidity of the I-shaped, L-shaped, T-shaped or cross-shaped cold-formed multi-cavity steel pipe concrete special-shaped columns and H-shaped steel beams. node. The invention starts from the two aspects of processing efficiency and improving economy, so that the joint has good mechanical properties, convenient construction and reasonable economy, and is a combined structural joint form with relatively good application prospects.

Description

Rigid joint between cold-formed multi-cavity concrete-filled steel tube special-shaped column and H-shaped steel beam

technical field

The invention belongs to the field of building structural components, in particular to a beam-column node of a steel-concrete composite structure.

Background technique

Special-shaped columns are currently widely used in buildings such as residences, apartments, and dormitories. The special-shaped columns are flush with adjacent walls, making the interior space of the building regular, which is conducive to furniture placement and improves the efficiency of indoor space utilization. However, the seismic design of special-shaped reinforced concrete columns commonly used at present is relatively strict, and the design indicators such as maximum service height and column axial compression ratio are far lower than ordinary rectangular reinforced concrete columns. The joints are often the weak link of the special-shaped column frame, which is an important factor to determine the mechanical performance of the special-shaped column frame structure system. The use of special-shaped steel tube concrete columns can significantly improve the seismic performance of the special-shaped column frame structure system.

However, the relatively high steel consumption of the traditional special-shaped concrete-filled steel tube column-H-shaped steel beam rigid joint makes its economic performance lower than that of the special-shaped reinforced concrete column frame structure. The traditional outer ring beam joints occupy a larger building space, while the inner ring joints affect the performance of concrete due to the occupation of the internal space of special-shaped columns. Therefore, in order to give full play to the advantages of concrete-filled steel tube special-shaped column-beam-column joints, it is necessary to start from three aspects: economy, occupied building area, and joint performance.

Contents of the invention

The purpose of the invention is to solve the adverse effects of local buckling of steel plates in special-shaped concrete-filled steel tube columns and frame joints, and reduce steel consumption to improve economic performance.

The technical scheme adopted for realizing the purpose of the present invention is such, a kind of rigid node of cold-formed multi-cavity concrete filled steel pipe special-shaped column and H-shaped steel beam, and its processing technology comprises the following steps:

1) Take a rectangular thin-walled steel plate and bend it into a hollow steel pipe with a rectangular cross-section by cold bending;

2) A butt weld is used at the overlapping portion of the side wall of the hollow steel pipe to close the side wall of the hollow steel pipe, thereby obtaining a core column steel pipe;

3) Cut out several rectangular thin-walled steel plates, and bend them into several U-shaped components by cold bending; each of the U-shaped components has two side plates and a bottom plate; the two side plates The plates are parallel to each other and perpendicular to the bottom plate; the distance between two side plates is equal to the width of one side of the core column steel pipe;

4) Splicing U-shaped members on one or more sides of the core column steel pipe, there are four splicing methods:

4.1) When splicing into a straight-shaped cold-formed multi-cavity steel pipe, a U-shaped member is spliced to one side of the core column steel pipe; the two side plates of the U-shaped member are respectively connected to the The two side edges of the spliced side are welded, so that the U-shaped member and the side are combined to form a rectangular steel pipe with a column limb;

4.2) When splicing into L-shaped cold-formed multi-cavity steel pipes, two adjacent sides of the core column steel pipes are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are respectively connected with the two side edges of the spliced side Connection, wherein the two side plates connected on the same side edge are welded with penetration welds, and the other side plates are welded with single-sided groove welds; so that each U-shaped member and the spliced side are combined into a column limb Rectangular steel pipe;

4.3) When splicing into a T-shaped cold-formed multi-cavity steel pipe, the three sides of the core column steel pipe are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are respectively connected with the two side edges of the spliced side, Among them, the two side plates connected on the same side edge are welded with penetration welds, and the other side plates are welded with single-sided groove welds; so that each U-shaped member and the spliced side are combined into a column-leg rectangular steel pipe ;

4.4) When splicing into a cross-shaped cold-formed multi-cavity steel pipe, the four sides of the core column steel pipe are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are respectively connected with the two side edges of the spliced side, The two side plates on each side edge are welded with penetration welds, so that each U-shaped member and the spliced side are combined into a column-leg rectangular steel pipe;

5) A U-shaped member is spliced on the side of the rectangular steel pipe of the column limb facing away from the steel pipe of the core column; the edge of the opening of the U-shaped member is welded to the two edges of the spliced side by using a single-sided groove weld, So that the U-shaped member and the spliced side are combined into an end-column steel pipe;

6) cut out opening I and opening II along the horizontal direction on the three sides of the end column steel pipe, and their projections on the horizontal plane are U-shaped; the opening I is located above the opening II;

7) Insert an upper flange connecting plate and a lower flange connecting plate into opening I and opening II respectively; the upper flange connecting plate is U-shaped fork; the upper flange connecting plate is snapped into opening I The connecting plate of the lower flange and the connecting plate of the upper flange are the same flat plate; the connecting plate of the upper flange and the connecting plate of the lower flange are parallel to each other; the plate surface of the connecting plate of the upper flange is perpendicular to the steel pipe of the end column ;

Then weld around opening I and opening II on three sides of the end column steel pipe by double-sided fillet welds;

8) Weld the upper web connecting plate on the end face of the end column steel pipe; the web connecting plate is located between the upper flange connecting plate and the lower flange connecting plate; the web connecting plate is perpendicular to the upper flange connecting plate ;

9) Weld a short steel beam at one end of the upper flange connecting plate, the lower flange connecting plate and the web connecting plate facing away from the end column steel pipe; the short steel beam is an H-shaped steel beam; the upper part of the short steel beam The flange and the upper flange connection plate are connected by butt welds; the lower flange of the short steel beam and the lower flange connection plate are connected by butt welds; the web of the short steel beam and the web connection plate are welded The end part of the panel is bonded, and the side fillet weld is used to connect;

10) Weld the steel beam at the end of the short steel beam facing away from the steel pipe of the end column; the steel beam is an H-shaped steel beam, and its upper flange and the upper flange of the short steel beam are connected by a butt weld, and its lower wing The flange and the lower flange of the short steel beam are connected by butt welds; the web of the steel beam and the web of the short steel beam are connected by connecting plates and anchor bolts;

11) Concrete is poured into the cavities of the core column steel pipe, column limb rectangular steel pipe and end column steel pipe (to obtain a cold-formed multi-cavity concrete-filled steel pipe special-shaped column with H-shaped steel beam nodes).

Rigid connection nodes between one-shaped, L-shaped, T-shaped or cross-shaped cold-formed multi-cavity steel pipe concrete special-shaped columns and H-shaped steel beams can be produced through the above-mentioned processing technology.

It is worth noting that the exposed width of the upper and lower flange connecting plates on the side of the end column steel pipe is recommended to be S/3, and the width of the embedded opening I/II is recommended to be S/6; the upper and lower flange connecting plates on the end column steel pipe The overhang length of the front (end face) is recommended to be 3S/4, and the width of the embedded opening I/II is recommended to be S/4; where S is the flange width of the steel beam; the thickness of the upper and lower flange connecting plates is recommended to be the same as the thickness of the steel beam flange Equal; the distance from the side edge of the upper and lower flange connecting plates to the inner partition of the end column (that is, the common surface of the rectangular steel pipe of the column limb and the steel pipe of the end column) is recommended to be 15-20mm. (The specific size is determined according to the actual scale of the project)

Further, the distance from the bottom plate of the U-shaped member to the opening is designed according to the size of the cold-formed multi-cavity concrete-filled steel pipe special-shaped column, and the distance between their two side plates is equal to the width of the steel pipe side of the core column.

Further, when two side plates on the same side edge are welded by penetration welds, a backing plate is pre-set on the inner walls of the two side plates; Plate fit; by welding a penetration weld to make the backing plate, side plate and side edge of the core column steel pipe welded together.

Further, the concrete is ordinary concrete, lightweight aggregate concrete or high performance concrete.

Further, the materials of the core column steel pipe, column limb rectangular steel pipe, end column steel pipe, upper flange connecting plate, lower flange connecting plate, web connecting plate, short steel beam and steel beam are carbon structural steel Q235 grade steel, low Alloy high-strength structural steel Q345, Q390, Q420 or Q460 steel.

The rigid joint between the cold-formed multi-cavity concrete filled steel pipe special-shaped column and the H-shaped steel beam proposed by the present invention has the following advantages:

1. The cold-formed multi-cavity concrete-filled steel tube special-shaped column in the present invention can be applied to low-rise or multi-story frame structures, frame-shear wall structures such as villas, houses, apartments, dormitories, and office buildings. Improve the defects of the exposed columns of ordinary square and rectangular columns, improve the indoor view, facilitate home placement, and improve the utilization efficiency of indoor space.

2. Multi-cavity concrete-filled steel tube special-shaped columns can improve the strict restrictions on the seismic design of concrete special-shaped columns commonly used at present, and expand the application range of special-shaped columns. The outsourcing steel pipe and the built-in vertical partition work together to give good restraint to the built-in concrete, which improves the bearing capacity and ductility of the special-shaped column, thereby improving the seismic performance of the special-shaped column, so that it can be used in areas with high seismic fortification intensity, or application In higher frame structures and frame-shear wall structures.

3. Since the cold-formed multi-cavity concrete-filled steel tube special-shaped column adopts a multi-cavity restraint method, thin steel pipes can also exert a good restraint effect. Compared with traditional concrete-filled steel tube special-shaped columns, multi-cavity concrete-filled steel tube special-shaped columns can have lower steel content and better economy under the premise of ensuring the performance of components.

4. Since the central core column steel tube and the peripheral U-shaped components are used to form a multi-cavity steel tube, there is no traditional internal angle between the concrete and the steel tube, which significantly improves the performance of the column. The multi-cavity structure allows the internal core column walls to directly replace the stiffeners and rationally arrange steel pipes. Most of the processing procedures can be prefabricated in the factory, reducing the workload of the on-site construction stage, which is very suitable for the needs of the current building industrialization.

5. Pre-buried U-shaped flange connecting plates are used in the joint area to transmit the bending moment of the short steel beam, and the web connecting plate is welded on the special-shaped column to transmit the shear force of the short steel beam. The above processes can all be prefabricated in the factory, and the connection between the site and the H-shaped steel beam adopts traditional bolt-welding hybrid connection. The frame joint form of the invention has clear force transmission, simple structure, fast and convenient construction, and economical and reasonable.

Description of drawings

Fig. 1 is the schematic diagram of the rigid node of cold-formed multi-cavity concrete filled steel pipe special-shaped column and H-shaped steel beam;

Fig. 2 is the top view of the L-shaped cold-formed multi-cavity concrete filled steel pipe special-shaped column;

Fig. 3 is the top view of the in-line cold-formed multi-cavity concrete filled steel pipe special-shaped column;

Fig. 4 is the top view of the T-shaped cold-formed multi-cavity concrete filled steel pipe special-shaped column;

Fig. 5 is the top view of the cross-shaped cold-formed multi-cavity concrete filled steel pipe special-shaped column;

Fig. 6 is the side view of the node position of Fig. 1;

FIG. 7 is a cross-sectional view at Q-Q in FIG. 6 .

In the figure: core column steel pipe 1, column limb rectangular steel pipe 2, end column steel pipe 3, butt weld 4, penetration weld 5, backing plate 6, single-sided groove weld 7, cold-formed multi-cavity steel pipe concrete special-shaped column 8. Upper flange connecting plate 9, lower flange connecting plate 90, web connecting plate 10, short steel beam 11, steel beam 12.

Detailed ways

The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

A rigid joint between a cold-formed multi-cavity steel pipe concrete special-shaped column and an H-shaped steel beam, and its processing technology includes the following steps:

1) Cut out a rectangular thin-walled steel plate, and bend it into a hollow steel pipe with a rectangular cross-section by cold bending. The selected cross-section is perpendicular to the length direction of the hollow steel pipe, and the preferred cross-section in this embodiment is a square.

2) Butt welds 4 are used at the lap joints of the side walls of the hollow steel tubes to close the side walls of the hollow steel tubes, so as to obtain the core column steel tubes 1 . Wherein the butt weld 4 is the central axis of the side where it is located, and its extension direction is the same as the length direction of the core column steel pipe 1 .

The core column steel tube 1 is a hollow column steel tube with both ends open, and its four sides can be used as connecting surfaces of column limbs. Let these four surfaces be respectively surface A, surface B, surface C and surface D, and the four side edges on them are edge a, edge b, edge c and edge d. The surface A, surface B, surface C or surface D and edge a, edge b, edge c or edge d described in this embodiment only represent any side or a certain side edge on the core column steel pipe 1, and are not Represents a certain surface or a certain edge at a fixed position, but surface A is opposite to surface C, and edge a is opposite to edge c.

3) Cut out several rectangular thin-walled steel plates, and bend them into several U-shaped components by cold bending. Each of the U-shaped members has two side panels and a bottom panel. The two side plates are parallel to each other and perpendicular to the bottom plate. The distance between the two side plates is equal to the width of the side of the steel pipe 1 of the core column. The distance from the bottom plate of the U-shaped member to the opening can be designed according to the actual needs of the project (the size of the cold-formed multi-cavity concrete-filled steel pipe special-shaped column 8), and the distance between their two side plates needs to be equal to the core The width of the column steel tube 1 side.

4) Splicing U-shaped members on one or more sides of the core column steel pipe 1, there are four splicing methods:

4.1) Referring to Figure 3, when splicing into a straight-shaped cold-formed multi-cavity steel pipe, a U-shaped member is spliced to the surface A of the core column steel pipe, and the two side edges on surface A are edge a and edge b; directly The two side plates of the U-shaped member are respectively welded to the edge a and the edge b of the surface A by using the single-side groove weld 7, so that the U-shaped member and the surface A are combined into a column-leg rectangular steel pipe 2.

4.2) Referring to Figure 2, when splicing into L-shaped cold-formed multi-cavity steel pipes, the two adjacent sides (surface A and surface B) of the core column steel pipe 1 are respectively spliced into a U-shaped member, and the two sides on surface A are The edges are edge a and edge b, and the two side edges on surface B are edge c and edge b; the two side plates of one U-shaped member are respectively connected with edge a and edge b of surface A, and the other U-shaped member’s The two side plates are respectively connected to edge b and edge c of surface B; among them, the two side plates connected to (common edge) edge b (two U-shaped members each provide a side plate) are welded by penetration weld 5 Welding, the other side plates (that is, the side plates connected to edge a and edge c) are welded with single-sided groove weld 7; so that the two U-shaped members are respectively combined with surface A and surface B to form two columns Limb rectangular steel pipe 2.

4.3) Referring to Figure 4, when splicing into a T-shaped cold-formed multi-cavity steel pipe, the surface A, surface B, and surface C of the core column steel pipe 1 are respectively spliced into a U-shaped member, and the two side edges on the surface A are edge a and edge b, the two side edges on face B are edge b and edge c, and the two side edges on face C are edge c and edge d;

The two side plates of one U-shaped member are respectively connected with rib a and rib b, the two side plates of one U-shaped member are respectively connected with rib b and rib c, and the two side plates of the other U-shaped member are respectively connected with rib c. Edge d connection; the two side plates connected on the same side edge are welded with penetration weld 5, and the other side plates are welded with single-sided groove weld 7; that is, the two side plates connected on edge b The plates (two adjacent U-shaped members each provide a side plate) are welded by penetration weld 5, and the two side plates connected to the edge c (each adjacent two U-shaped members provide a side plate) are also welded by The penetration weld 5 is welded; the side plate connected to the edge a and the edge c is welded with the single-sided groove weld 7; so that the three U-shaped members are respectively combined with the surface A, surface B, and surface C into three column limb rectangular steel pipes 2.

4.4) Referring to Figure 5, when splicing into a cross-shaped cold-formed multi-cavity steel pipe, the surface A, surface B, surface C, and surface D of the core column steel pipe 1 are respectively spliced into a U-shaped member, and the two side edges on the surface A are are edge a and edge b, the two side edges on face B are edge b and edge c, the two side edges on face C are edge c and edge d, and the two side edges on face D are edge d and edge a; The two side plates of one U-shaped member are respectively connected with rib a and rib b, the two side plates of a U-shaped member are respectively connected with rib b and rib c, and the two side plates of a U-shaped member are respectively connected with Ridge c and rib d are connected, and the two side plates of another U-shaped member are respectively connected with rib d and rib a; the two side plates on each side edge (rib a, rib b, rib c, and rib d) (Two adjacent U-shaped members each provide a side plate) are welded with penetration weld 5, so that the four U-shaped members are respectively combined with the surface A, surface B, surface C, and surface D to form four columns Limb rectangular steel pipe 2.

It should be noted that the L-shaped, T-shaped and cross-shaped cold-formed multi-cavity steel pipes all have the situation that the core column steel pipe 1 has a column limb rectangular steel pipe 2 on both sides adjacent to each other, that is, in the above steps, the L-shaped cold-formed multi-cavity steel pipe Two side plates are welded at edge b of the steel pipe (one side plate is provided for each adjacent U-shaped member, the same below); two side plates are welded at edge b and edge c of T-shaped cold-formed multi-cavity steel pipe; ten Each side edge (edge a, edge b, edge c, edge d) of the zigzag cold-formed multi-cavity steel pipe is welded with two side plates.

In this embodiment, if two side plates are to be welded on one side edge of the core column steel pipe 1, a backing plate 6 needs to be attached to the inner walls of the two side plates in advance. The backing plate 6 is a strip-shaped metal plate, and its surface is attached to the side plate; the length direction of the backing plate 6 is the same as the length direction of the side plate it is attached to. Then a penetration weld 5 is welded to weld the two side plates and the backing plate 6 and the core column steel pipe 1 together. Wherein the backing plate 6 can ensure that the welding seam is smooth and smooth, and does not produce welding seam defects. If only one side plate is welded on one side edge of the core column steel pipe 1, the single-side groove weld 7 is directly used for welding.

5) A U-shaped component is also spliced on the bottom plate of the rectangular steel pipe 2 of the column limb. During splicing, the edge of the opening of the U-shaped component is welded to the bottom plate of the rectangular steel pipe 2 by using a single-sided groove weld 7, so that the U-shaped component and the bottom plate are combined into an end column steel tube 3.

6) Cut along the horizontal direction on the three sides of the end column steel pipe 3 (i.e. the outer surfaces of the two side plates of the U-shaped member itself and the outer surface of the bottom plate, the outer surface of the bottom plate in the following text is the end face of the end column steel pipe 3) Out of opening I and opening II, their projections on the horizontal plane are U-shaped; the cut opening is to completely cut off the bottom plate and partially cut off the two side plates. The opening I is located above the opening II;

7) Insert an upper flange connecting plate 9 and a lower flange connecting plate 90 into opening I and opening II respectively; the upper flange connecting plate 9 is U-shaped fork; the upper flange connecting plate 9 snaps In the opening I; that is, part of the plate surface of the upper flange connecting plate 9 has been inserted into the opening I, and there is also a part of the plate surface on the outside of the end column steel pipe 3;

The lower flange connecting plate 90 and the upper flange connecting plate 9 are the same flat plate; the upper flange connecting plate 9 and the lower flange connecting plate 90 are parallel to each other; the board surface of the upper flange connecting plate 9 is vertical At the end column steel pipe 3;

Then weld around the opening I and the opening II on the three sides of the end column steel pipe 3 through double-sided fillet welds;

Specifically, the width of the end of the upper flange connection plate 9 facing away from the end column steel pipe 3 (that is, the connection end with the short steel beam) is the narrowest, so that the connection between the upper flange connection plate 9 and the short steel beam 11 The width gradually transitions to be consistent, avoiding stress concentration;

8) Weld the upper web connecting plate 10 on the end surface of the end column steel pipe 3 (using double-sided fillet welds); the web connecting plate 10 is located between the upper flange connecting plate 9 and the lower flange connecting plate 90; The web connecting plate 10 is perpendicular to the upper flange connecting plate 9;

9) Weld a short steel beam 11 at one end of the upper flange connecting plate 9, the lower flange connecting plate 90 and the web connecting plate 10 facing away from the end column steel pipe 3; the short steel beam 11 is an H-shaped steel beam (also can be called I-beam); the width side of the upper flange of the short steel beam 11 is connected with the upper flange connecting plate 9 by a butt weld; the width side of the lower flange of the short steel beam 11 is connected with the lower flange The edge connecting plate 90 is connected by a butt weld; the web of the short steel beam 11 is bonded to the welding end part of the web connecting plate 10, and connected by a side fillet weld;

The above are prefabricated processing procedures in the factory;

10) Transport the prefabricated components to the construction site, and weld the steel beam 12 at the end of the short steel beam 11 facing away from the end-column steel pipe 3; the steel beam 12 and the short steel beam 11 are connected by bolt welding combination of traditional steel structure mode; the steel beam 12 is an H-shaped steel beam (also called an I-shaped steel beam), its upper flange and the upper flange of the short steel beam 11 are connected by butt welds, and its lower flange and the short steel beam The lower flange of the beam 11 is connected by a butt weld; the web of the steel beam 12 and the web of the short steel beam 11 are connected by a connecting plate and an anchor bolt;

11) Concrete is poured into the cavities of the core column steel pipe 1, the column rectangular steel pipe 2 and the end column steel pipe 3 to obtain a one-shaped, L-shaped, T-shaped or cross-shaped cold-formed multi-cavity concrete-filled steel pipe special-shaped column and H Rigid connection nodes of shaped steel beams.

In this embodiment, the concrete may be ordinary concrete, lightweight aggregate concrete or high performance concrete. The material of the core column steel pipe 1, the column limb rectangular steel pipe 2, the end column steel pipe 3, the upper flange connecting plate 9, the lower flange connecting plate 90, the web connecting plate 10, the short steel beam 11 and the steel beam 12 is carbon Plain structural steel Q235 steel, low-alloy high-strength structural steel Q345, Q390, Q420 or Q460 steel.

Claims (5)

1. a rigid joint of cold-formed multi-cavity concrete filled steel pipe special-shaped column and H-shaped steel beam, is characterized in that, its processing technology comprises the steps: 1) Take a rectangular thin-walled steel plate and bend it into a hollow steel pipe with a rectangular cross-section by cold bending; 2) A butt weld (4) is used at the overlap of the side walls of the hollow steel pipes to close the side walls of the hollow steel pipes, thereby obtaining the core column steel pipes (1); 3) Cut out several rectangular thin-walled steel plates, and bend them into several U-shaped components by cold bending; each of the U-shaped components has two side plates and a bottom plate; the two side plates The plates are parallel to each other and perpendicular to the bottom plate; the distance between the two side plates is equal to the width of one side of the core column steel pipe (1); 4) Splicing U-shaped members on one or more sides of the core column steel pipe (1), there are four splicing methods: 4.1) When splicing into a straight-shaped cold-formed multi-cavity steel pipe, a U-shaped member is spliced to one side of the core column steel pipe (1); the two sides of the U-shaped member are connected by a single-sided groove weld (7). A side plate is respectively welded to two side edges of the spliced side, so that the U-shaped member and the side are combined to form a rectangular steel pipe (2); 4.2) When splicing into L-shaped cold-formed multi-cavity steel pipes, two adjacent sides of the core column steel pipe (1) are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are respectively connected with the two sides of the spliced side The side edges are connected, wherein the two side plates connected on the same side edge are welded with penetration welds (5), and the other side plates are welded with single-side groove welds (7); thus, each U-shaped The component and the spliced side are combined to form a column-leg rectangular steel pipe (2); 4.3) When splicing into a T-shaped cold-formed multi-cavity steel pipe, the three sides of the core column steel pipe (1) are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are connected with the two side plates of the spliced side respectively. Ridge connection, where the two side plates connected to the same side rib are welded with penetration welds (5), and the other side plates are welded with single-sided groove welds (7); so that each U-shaped member and The spliced sides are combined to form a rectangular steel pipe (2); 4.4) When splicing into a cross-shaped cold-formed multi-cavity steel pipe, the four sides of the core column steel pipe (1) are respectively spliced with a U-shaped member; the two side plates of each U-shaped member are connected with the two side plates of the spliced side edge connection, wherein the two side plates on each side edge are welded with a penetration weld (5), so that each U-shaped member and the spliced side are combined into a rectangular steel pipe (2); 5) A U-shaped component is spliced on the side of the column limb rectangular steel pipe (2) facing away from the core column steel pipe (1); the edge of the opening of the U-shaped component is connected to the The two edges of the spliced side are welded, so that the U-shaped member and the spliced side are combined into an end column steel pipe (3); 6) cutting out opening I and opening II along the horizontal direction on the three sides of the end column steel pipe (3), and their projections on the horizontal plane are U-shaped; the opening I is located above the opening II; 7) Insert an upper flange connecting plate (9) and a lower flange connecting plate (90) in opening I and opening II respectively; the upper flange connecting plate (9) is U-shaped fork; the upper flange The edge connecting plate (9) is clamped in the opening I; the lower flange connecting plate (90) and the upper flange connecting plate (9) are the same flat plate; the upper flange connecting plate (9) and the lower wing The flange connecting plates (90) are parallel to each other; the plate surface of the upper flange connecting plate (9) is perpendicular to the end column steel pipe (3); Then weld around the opening I and the opening II on the three sides of the end column steel pipe (3) by double-sided fillet welds; 8) Weld the upper web connecting plate (10) on the end face of the end column steel pipe (3); the web connecting plate (10) is located between the upper flange connecting plate (9) and the lower flange connecting plate (90) between; the web connecting plate (10) is perpendicular to the upper flange connecting plate (9); 9) Weld a short steel beam (11) at the end of the upper flange connecting plate (9), the lower flange connecting plate (90) and the web connecting plate (10) facing away from the end column steel pipe (3); The beam (11) is an H-shaped steel beam; the upper flange of the short steel beam (11) is connected with the upper flange connecting plate (9) by a butt weld; the lower flange of the short steel beam (11) It is connected with the lower flange connecting plate (90) by a butt weld; the web of the short steel beam (11) is bonded to the welding end part of the web connecting plate (10), and connected by a side fillet weld; 10) weld the steel beam (12) at one end of the short steel beam (11) facing away from the end column steel pipe (3); the steel beam (12) is an H-shaped steel beam, and its upper flange and the short steel beam (11 ) is connected by a butt weld, its lower flange and the lower flange of the short steel beam (11) are connected by a butt weld; the web of the steel beam (12) is connected to the short steel beam (11) The webs are connected by connecting plates and anchor bolts; 11) Concrete is poured into the cavities of the core column steel pipe (1), the column limb rectangular steel pipe (2) and the end column steel pipe (3). 2. The rigid node of a cold-formed multi-chamber concrete-filled steel pipe special-shaped column and H-shaped steel beam according to claim 1, wherein the distance from the bottom plate of the U-shaped member to the opening is determined according to the cold-formed multi-chamber concrete-filled steel pipe The size of the special-shaped column is designed correspondingly, and the distance between their two side plates is equal to the width of the core column steel pipe (1) side. 3. The rigid joint of a cold-formed multi-cavity concrete-filled steel tube special-shaped column and an H-shaped steel beam according to claim 1, characterized in that: two side plates on the same side edge are welded by penetration welds (5) , the inner walls of these two side plates are pre-set with a backing plate (6); The seam (5) makes the backing plate (6), the side plate and the side edge of the core column steel pipe (1) welded together. 4. The rigid joint between a cold-formed multi-cavity concrete-filled steel tube special-shaped column and an H-shaped steel beam according to claim 1, wherein the concrete is ordinary concrete, lightweight aggregate concrete or high-performance concrete. 5. The rigid node of a cold-formed multi-cavity steel pipe concrete special-shaped column and H-shaped steel beam according to claim 1, characterized in that: the core column steel pipe (1), the column limb rectangular steel pipe (2), the end The column steel pipe (3), the upper flange connecting plate (9), the lower flange connecting plate (90), the web connecting plate (10), the short steel beam (11) and the steel beam (12) are made of carbon structure Steel Q235 grade steel, low alloy high strength structural steel Q345 grade, Q390 grade, Q420 grade or Q460 grade steel.