Steel pipe stand column inline joint and installation method

Abstract

A steel pipe column inline joint and a mounting method relate to the technical field of steel pipe column construction and are used for connection between cuboid modules, each cuboid module comprises steel pipe columns located at four corners, four cuboid modules are in butt joint, the four steel pipe columns at the butt joint are combined to form a middle column, the four steel pipe columns form the middle column, and the four steel pipe columns are arranged in a central symmetry mode. And inner hexagon bolts are used for penetrating connection. The steel pipe stand column is a rectangular pipe, and the four walls of the steel pipe stand column are the first pipe wall, the second pipe wall, the third pipe wall and the fourth pipe wall in the anticlockwise direction. Wherein a rectangular hole is formed in the center of the first pipe wall. And four D57mm third butt joint holes are uniformly formed in the center of the third pipe wall along the longitudinal axis at intervals. The problems that in the prior art, the occupied space of a middle column is large, the rigidity of a stand column is insufficient, and structural seismic resistance is not facilitated are solved, and the problems that in the installation process, on-site installation modules cover one another, local structures are unreasonable in construction, the on-site construction workload is large, and on-site decoration construction is inconvenient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe column construction, and specifically to an internal connection node and installation method of a steel pipe column. Background Art

[0002] Modular building is the highest form of prefabricated building. Ordinary prefabricated buildings often involve factory prefabrication of certain building and structural components, and then corresponding professional connections are made on site (such as welding, screwing, self-tapping screw connection, etc.); while modular buildings emphasize disassembling the building into several components fabricated in the factory, which integrate all specialties of "architecture, structure, plumbing, electricity, decoration, and intelligentization", and key and efficient connections are made on site; in modular buildings, from the degree of factory prefabrication, it can be divided into plate modules (integrating wall panels, floor slabs, ceilings, and roofs), and three-dimensional box modules with in-factory space integration, which is the form with the highest degree of prefabrication; modular buildings have been widely used at home and abroad, from general temporary residences, offices, and medical shelters to permanent schools, white-collar apartments, and homestay hotels; with its highest prefabrication and assembly rate, modular buildings can effectively utilize factory equipment and environment to achieve high-quality, low-cost, and short-cycle product manufacturing, while minimizing on-site construction workload at the same time. It is a future building scenario that adapts to the national policy of high-quality development of the construction industry.

[0003] However, modular buildings also have a series of problems, including problems in terms of system, technology, and cost. Taking the modular corner column problem involved in the present invention as an example, the existing problems include:

[0004] 1. Occupying space: According to the requirements of the seismic structure code, for steel structure houses with a height less than or equal to 50m in the 8-degree seismic zone, the seismic grade is grade three; in most areas of our country, the seismic intensity grade is not higher than 8 degrees, and the number of floors of modular buildings is generally not more than 14 floors (3.5m per floor), so the highest seismic fortification measures of grade three can be selected, that is, the slenderness ratio is not greater than and the wall thickness-to-width ratio is not greater than 32; in modular buildings, square tube columns have the best mechanical properties, and Q355B steel is selected, so the smallest square tube obtained is 150, and the thickness is not less than 5; for higher seismic and wind resistance grades, or higher floors, larger columns are often required; in modular buildings, a cuboid module contains 4 corner columns, and in a completed modular building, a middle column is composed of 4 columns; considering the minimum installation gap of 5mm between columns, the fireproof layer thickness of 7mm, the finishing keel of 30mm, and the finishing panel of 9mm, the width of the completed surface of a middle column is (9 + 30 + 7 + 150 + 5 + 150 + 7 + 30 + 9) = 397mm, and the width of a general module is not greater than 3600mm, so the minimum space occupied by the middle column is 11% of the module bay width, which is significantly larger.

[0005] 2. Column stiffness: In modular buildings, two columns work independently, with low lateral stiffness and large inter-story displacements under seismic actions. The beam cross-section in the long side direction of the module is generally not less than 250 in height. Therefore, the stiffness and strength are often greater than those of the columns, which is likely to result in "strong beams and weak columns", being unfavorable for structural earthquake resistance.

[0006] Defects of the existing installation method:

[0007] Making two columns work together is the most effective way to improve the overall stiffness of the columns. However, the cost of on-site connection is high and the connection strength is limited. For example, using the method of welding side plates on the side walls of the columns can effectively ensure the transfer of vertical shear force between adjacent columns. However, due to the problem of on-site installation modules covering each other, adjacent columns can only be eccentrically connected on one side wall, resulting in unreasonable local structural configurations. In addition, the reliability of on-site welding has a great impact on the completed thermal insulation and decoration layers, and it needs to be supplemented on-site, resulting in a large amount of on-site construction work, which goes against the original intention of prefabricated buildings. Moreover, the laterally welded steel plates further increase the width of the completed surface of the columns, making on-site decoration construction inconvenient. Summary of the Invention

[0008] The purpose of the present invention is to provide an internal connection node and installation method for steel pipe columns, which solve the problems existing in the prior art, such as large space occupied by middle columns, insufficient column stiffness and being unfavorable for structural earthquake resistance, and problems such as on-site installation modules covering each other, unreasonable local structural configurations, large amount of on-site construction work, and inconvenient on-site decoration construction during installation.

[0009] To achieve the above purpose, the present invention adopts the following technical solutions:

[0010] The internal connection node of the steel pipe column is used for the connection between cuboid modules. The cuboid modules include steel pipe columns at the four corners. Four cuboid modules are butt-jointed, and the four steel pipe columns at the butt-joint form a middle column. The four steel pipe columns forming the middle column are arranged in central symmetry and are connected by through hexagon socket head cap screws.

[0011] The steel pipe column is a rectangular pipe, and its four walls are respectively the first pipe wall, the second pipe wall, the third pipe wall, and the fourth pipe wall in the counterclockwise direction.

[0012] A rectangular hole is opened at the center of the first pipe wall.

[0013] Four D57mm third docking holes are evenly spaced along the longitudinal axis at the center of the third pipe wall.

[0014] Four D35mm fourth docking holes are evenly spaced along the longitudinal axis at the center of the fourth pipe wall.

[0015] Five pairs of D16mm plug welding holes are spaced on both sides of the centers of the second pipe wall, the third pipe wall, and the fourth pipe wall.

[0016] A shear resistance strengthening connecting piece is inserted and fitted inside the steel pipe column. The shear resistance strengthening connecting piece is inserted into the steel pipe column through a rectangular hole. The shear resistance strengthening connecting piece is a rectangular pipe with a thickness of 12 - 15 mm. Its four walls are respectively the first column wall, the second column wall, the third column wall, and the fourth column wall in the counterclockwise direction; among them, the third column wall faces inwards and the first column wall faces outwards.

[0017] Four D35 mm first round holes are evenly spaced along the longitudinal axis at the center of the first column wall.

[0018] Both sides of the third column wall are provided with through - length chamfers. Four D57 mm third round holes are evenly spaced along the longitudinal axis at the center of the third column wall. The third round holes are installation holes.

[0019] Four D35 mm fourth round holes are evenly spaced along the longitudinal axis at the center of the fourth column wall.

[0020] On the inner side surface of the fourth column wall, a washer and a nut of M30 mm that are aligned with the fourth round hole are welded.

[0021] The third docking hole is aligned with the third round hole and has the same size.

[0022] The fourth docking hole is aligned with the fourth round hole and has the same size.

[0023] A washer is spot - welded on the socket - head cap screw.

[0024] When connecting the steel pipe columns of two adjacent cuboid modules, the socket - head cap screw passes through the third docking hole and the third round hole of the first cuboid module, penetrates into the interior of the first cuboid module, then horizontally and forwardly passes through the rectangular hole and the first round hole of the first cuboid module and the fourth docking hole and the fourth round hole of the second cuboid module in sequence, and is inserted into the nut.

[0025] A further preferred technical solution: The diameter of the third round hole is larger than the outer diameter of the M30 mm washer, and the outer diameter of the washer is 56 mm.

[0026] A further preferred technical solution: The center distances of the first round hole, the third round hole, and the fourth round hole are all 105 mm, and the edge distances are all 70 mm.

[0027] The washer is arranged between the first column wall of the first cuboid module and the socket - head cap screw.

[0028] A further preferred technical solution: The shear resistance strengthening connecting piece is a cast steel piece.

[0029] A further preferred technical solution: Single - bevel grooves are opened on the upper and lower horizontal sides of the rectangular hole, and the angle is 45 degrees.

[0030] The installation method of the internal connection node of the steel pipe column is as follows:

[0031] Step 1: Arrange the first rectangular module, the second rectangular module, the third rectangular module, and the fourth rectangular module in sequence. The steel pipe columns of the four rectangular modules are arranged in central symmetry and combined to form a central column.

[0032] Step 2: Install the first rectangular module and insert the shear strengthening connector into the steel pipe column.

[0033] Step 3: Install the second rectangular module and insert the shear strengthening connector into the steel pipe column. At the position of the steel pipe column adjacent to the first rectangular module and the second rectangular module, use an M30 hexagon socket head cap screw together with a washer with an outer diameter of 56 mm to pass through the No. 3 docking hole and the No. 3 round hole of the first rectangular module, penetrate into the inside of the first rectangular module, and then horizontally pass forward through the rectangular opening and the No. 1 round hole of the first rectangular module and the No. 4 docking hole and the No. 4 round hole of the second rectangular module in sequence, and insert them into the nut to complete the connection between the first rectangular module and the second rectangular module.

[0034] Step 4: Install the third rectangular module; repeat the above Step 2. At the position of the steel pipe column adjacent to the second rectangular module and the third rectangular module, use an M30 hexagon socket head cap screw together with a washer with an outer diameter of 56 mm to complete the connection between the second rectangular module and the third rectangular module.

[0035] Step 5: Install the fourth rectangular module; repeat the above Step 2. At the position of the steel pipe column adjacent to the third rectangular module and the fourth rectangular module, use an M30 hexagon socket head cap screw together with a washer with an outer diameter of 56 mm to complete the connection between the third rectangular module and the fourth rectangular module.

[0036] Step 6: Seal the construction opening of the steel pipe column on site.

[0037] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0038] 1. Increase in lateral stiffness: Through theoretical derivation, the proposed method of internal connection and local shear resistance can effectively increase the lateral stiffness of the composite column to If arranged at the inflection point of the column, the stiffness increases by 53%.

[0040] 2. No eccentricity and good local stress: The force at the connection point has no eccentricity and the stress of the column is good.

[0041] 3. No protrusion in the structure: There are no redundant protruding connectors on the surface of the column, and the decoration method is simple.

[0042] 4. Convenient to repair: It only needs to use standard prefabricated parts to seal the thermal insulation and decoration layer in the rectangular installation space of 150x373 exposed on the column, and the production is convenient.

[0043] 5. Central symmetry: The use of a centrally symmetric reinforcing connector and a square tube column allows for the use of standard parts and standard installation processes, with standard fabrication and convenient construction.

[0044] 6. Perforated connection: The reinforcing connector strengthens the entire connection section at the same time. Therefore, a perforated connection scheme can be adopted, and the weakened column wall can be strengthened by the reinforcing connector, without damaging the strength and stiffness of the structural column; moreover, the perforated connection method realizes the feature of no protrusion of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a perspective view of the column in the present invention;

[0046] Figure 2 is a plan view of the column in the present invention;

[0047] Figure 3 is a schematic view of the insertion connection of the steel pipe column and the shear-resistant reinforcing connector in the present invention;

[0048] Figure 4 is a schematic view of the shear-resistant reinforcing connector in the present invention;

[0049] Figure 5 is a schematic view of the steel pipe column in the present invention;

[0050] Figure 6 is a schematic view of the connection of four cuboid modules in the present invention;

[0051] Figure 7 is a schematic view of the connection of the steel pipe column and the shear-resistant reinforcing connector in the present invention;

[0052] Figure 8 is a schematic view of a single cuboid module in the present invention;

[0053] Figure 9 is a schematic view of the connection of two cuboid modules in the present invention;

[0054] Figure 10 is a perspective view of the connection of the steel pipe columns of two cuboid modules through internal hexagonal bolts in the present invention;

[0055] Figure 11 is a plan view of the connection of the steel pipe columns of two cuboid modules in the present invention;

[0056] Figure 12 is a schematic view of the connection of three cuboid modules in the present invention;

[0057] Figure 13 is a plan view of the connection of the steel pipe columns of three cuboid modules in the present invention;

[0058] Figure 14 is a schematic view of the connection of four cuboid modules in the present invention;

[0059] Figure 15 It is the connection plan view of the steel pipe columns of the four cuboid modules of the present invention;

[0060] Figure 16 It is the schematic diagram before the construction opening of the steel pipe column of the present invention is blocked;

[0061] Figure 17 It is the schematic diagram after the construction opening of the steel pipe column of the present invention is blocked;

[0062] Reference numerals: 1 - steel pipe column, 2 - shear strengthening connecting piece, 3 - hexagon socket head bolt, 4 - washer,

[0063] 1.1 - No. 1 pipe wall, 1.2 - No. 2 pipe wall, 1.3 - No. 3 pipe wall, 1.4 - No. 4 pipe wall, 1.5 - rectangular opening, 1.6 - No. 3 docking hole, 1.7 - No. 4 docking hole, 1.8 - plug welding hole,

[0064] 2.1 - No. 1 column wall, 2.2 - No. 2 column wall, 2.3 - No. 3 column wall, 2.4 - No. 4 column wall, 2.5 - No. 1 round hole, 2.6 - chamfer, 2.7 - No. 3 round hole, 2.8 - No. 4 round hole, 2.9 - nut. Detailed implementation manners

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the protection scope of the present invention.

[0066] See Figures 1 to 17 As shown, for the internal connection node and installation method of the steel pipe column of the present invention, the internal connection node of the steel pipe column is used for the connection between cuboid modules. The cuboid modules include steel pipe columns 1 located at the four corners. The steel pipe columns 1 of the four cuboid modules are combined to form a middle column and are connected through hexagon socket head bolts 3;

[0067] The steel pipe column 1 is a rectangular pipe, and its four walls are respectively the No. 1 pipe wall 1.1, the No. 2 pipe wall 1.2, the No. 3 pipe wall 1.3 and the No. 4 pipe wall 1.4 in the counterclockwise direction;

[0068] Among them, a rectangular opening 1.5 is opened at the center of the No. 1 pipe wall 1.1;

[0069] Four No. 3 docking holes 1.6 with a diameter of D57mm are evenly spaced along the longitudinal axis at the center of the No. 3 pipe wall 1.3;

[0070] Four No. 4 docking holes 1.7 with a diameter of D35mm are evenly spaced along the longitudinal axis at the center of the No. 4 pipe wall 1.4;

[0071] On both sides of the centers of the second pipe wall 1.2, the third pipe wall 1.3 and the fourth pipe wall 1.4, five pairs of plug weld holes 1.8 with a diameter of D16mm are spaced apart;

[0072] A shear resistance strengthening connector 2 is fitted and inserted into the steel pipe column 1. The shear resistance strengthening connector 2 is inserted into the steel pipe column 1 through the rectangular hole 1.1. The shear resistance strengthening connector 2 is a rectangular pipe with a thickness of 12 - 15mm. Its four walls are respectively the first column wall 2.1, the second column wall 2.2, the third column wall 2.3 and the fourth column wall 2.4 in the counterclockwise direction; among them, the third column wall 2.3 faces inwards and the first column wall 2.1 faces outwards;

[0073] Four D35mm first round holes 2.5 are evenly spaced along the longitudinal axis at the center of the first column wall 2.1;

[0074] Both sides of the third column wall 2.3 are provided with a through - length chamfer 2.6. Four D57mm third round holes 2.7 are evenly spaced along the longitudinal axis at the center of the third column wall 2.3. The third round holes 2.7 are installation holes;

[0075] The diameter of the third round hole 2.7 is larger than the outer diameter of the M30mm washer. The outer diameter of the washer is 56mm;

[0076] Four D35mm fourth round holes 2.8 are evenly spaced along the longitudinal axis at the center of the fourth column wall 2.4; on the inner side of the fourth column wall, an M30mm washer and nut 2.9 that are aligned with the fourth round hole 2.8 are welded;

[0077] The center distances of the first round hole 2.5, the third round hole 2.7 and the fourth round hole 2.8 are all 105mm, and the edge distances are all 70mm;

[0078] The third docking hole 1.6 is aligned with the third round hole 2.7 and has the same size;

[0079] The fourth docking hole 1.7 is aligned with the fourth round hole 2.8 and has the same size;

[0080] A washer 4 is put on the internal hexagonal bolt 3;

[0081] When connecting the steel pipe columns 1 of two adjacent cuboid modules, the internal hexagonal bolt 3 passes through the third docking hole 1.6 and the third round hole 2.7 of the second cuboid module, then passes through the fourth docking hole 1.7 and the fourth round hole 2.8 of the first cuboid module, and is inserted into the nut 2.9;

[0082] The four steel pipe columns 1 in the central column are arranged in central symmetry; when connecting the steel pipe columns 1 of two adjacent cuboid modules, the hexagon socket head cap bolt 3 passes through the third docking hole 1.6 and the third round hole 2.7 of the first cuboid module, penetrates into the first cuboid module, then horizontally passes forward through the rectangular opening 1.5 and the first round hole 2.5 of the first cuboid module, as well as the fourth docking hole 1.7 and the fourth round hole 2.8 of the second cuboid module, and is inserted into the nut 2.9;

[0083] The washer 4 is arranged between the first pipe wall 1.1 of the first cuboid module and the hexagon socket head cap bolt 3;

[0084] Each component is processed and prefabricated in the factory, and the processing steps and quality requirements in the factory are as follows:

[0085] 1. The shear strengthening connector 2 is a cast steel part. After casting, it is drilled and polished. The outer contour tolerance is -0.5mm,

[0086] The hole position and hole diameter tolerance are ±0.1mm;

[0087] 2. Spot weld M30 nuts and washers inside the column wall of the shear strengthening connector 2, with no less than 3 weld points, and the tolerance is

[0088] ±0.2mm;

[0089] 3. The steel pipe column 1 is a finished square pipe with a wall thickness of 6 / 8 / 10mm, the thickness tolerance is ±0.1mm, and the appearance dimension tolerance is

[0090] ±0.2mm;

[0091] 4. Cut off one side of the column wall at the center of the steel pipe column 1 to form a rectangular opening 1.5, and the inner contour tolerance of the rectangular opening is +0.5mm;

[0092] 5. Open single bevels on the upper and lower horizontal sides of the rectangular opening 1.5, and the angle is 45 degrees;

[0093] 6. Insert the shear strengthening connector 2 into the rectangular opening 1.5 and position it;

[0094] 7. Plug weld the plug weld hole 1.8, weld the butt welds (grade I welds) of the column walls on the upper and lower sides of the rectangular opening 1.5, and the fillet welds on both sides (the weld leg height is the wall thickness, grade II welds);

[0095] 8. The hole position tolerance of the finished plug weld hole 1.8 is ±0.2mm;

[0096] 9. Weld the finished cuboid module skeleton. The opening directions of the steel pipe columns 1 at the four corners are as follows Figure 6, that is: the rectangular opening on the steel pipe column 1 in the lower left corner faces forward; the rectangular opening on the steel pipe column 1 in the lower right corner faces right; the rectangular opening on the steel pipe column 1 in the upper right corner faces backward; the rectangular opening on the steel pipe column 1 in the upper left corner

[0097] faces left;

[0098] 10. Installation rule: Rotate the cuboid module so that any steel pipe column 1 is in the lower left corner position, then the

[0099] rectangular opening must face forward;

[0100] 11. The positioning tolerance of the bolt hole is ±1.0 mm; (Which specific hole is the bolt hole)

[0101] 12. Install the interior decorative floor of the cuboid module and the exterior finish of the steel pipe column. On the side of the steel pipe column (the 3rd column wall) opposite to the rectangular opening on the steel pipe column, leave a construction opening;

[0102] The installation method of the internal connection node of the steel pipe column of the present invention comprises the following steps:

[0103] 1. Arrange the first cuboid module, the second cuboid module, the third cuboid module and the fourth cuboid module in sequence. The steel pipe columns 1 of the four cuboid modules are arranged in central symmetry and combined to form a middle column;

[0104] 2. Place the first cuboid module and insert the shear strengthening connector 2 into the steel pipe column 1;

[0105] 3. Place the second cuboid module and insert the shear strengthening connector 2 into the steel pipe column 1; At the position of the steel pipe column 1 adjacent to the first cuboid module and the second cuboid module, use the M30 hexagon socket head cap screw 3 together with the washer 4 with an outer diameter of 56 mm, pass through the third docking hole 1.6 and the third round hole 2.7 of the first cuboid module, penetrate into the interior of the first cuboid module, and then horizontally forward pass through the rectangular opening 1.5 and the first round hole 2.5 of the first cuboid module and the fourth docking hole 1.7 and the fourth round hole 2.8 of the second cuboid module, and insert into the nut 2.9 to complete the connection between the first cuboid module and the second cuboid module;

[0106] 4. Place the third cuboid module; Repeat the above step 2. At the position of the steel pipe column 1 adjacent to the second cuboid module and the third cuboid module, use the M30 hexagon socket head cap screw 3 together with the washer 4 with an outer diameter of 56 mm to complete the connection between the second cuboid module and the third cuboid module;

[0107] 5. Install the fourth cuboid module; repeat the above step 2. At the position of the steel pipe column 1 adjacent to the third and fourth cuboid modules, use the M30 hexagon socket head cap screw 3 together with the washer 4 with an outer diameter of 56 mm to complete the connection between the third and fourth cuboid modules.

[0108] 6. Plug the construction opening of the steel pipe column 1 on site.

[0109] The present invention adopts a central symmetry structure form of non-exposed reinforced internal connection nodes.

[0110] For the model components, taking actual calculation examples, the steel pipe column 1 has a specification of 150x8 mm, a center spacing of 0.155 m, and is covered with a 7-mm-thick intumescent fireproof coating; the steel pipe column is 3000 mm high, and shear connectors are set at the center point and are connected on site with 4 M30 bolts.

[0111] The steel pipe columns 1 at the four corner positions of the four cuboid modules are combined to form a middle column. The forms, opening sizes and positions of the four steel pipe columns, the corresponding standard node positions, and the connection methods are all the same. Therefore, a 4-steel pipe column central symmetry structure is formed, and there is no protrusion on the surface of the steel pipe column, which is convenient for manufacturing and connection, and is conducive to standardized manufacturing and construction.

[0112] Take one of the steel pipe columns. It can be seen that the column wall is cut off on one side of the steel pipe column to form a rectangular opening with a height-width of 457*136, and then a standard shear strengthening connector with a height-width-depth of 455*128*144 is inserted; the shear strengthening connector is a thickened (12-15 thick) rectangular pipe, and the column walls are marked as No. 1-4 respectively. Among them: there are 4 D35 round holes in the center of the No. 1 column wall; there are no holes in the No. 2 column wall; there are chamfers on both sides of the No. 3 column wall, and there are 4 D57 round holes in the center of the column wall, which are installation holes and are larger than the outer diameter of the M30 washer of 56 mm; there are 4 D35 round holes in the center of the No. 4 column wall, and M30 washers and nuts are welded on the inner wall of the corresponding holes; the center distance of the bolt holes is 105 mm, and the edge distance is 70 mm.

[0113] Correspondingly, at the position where the column wall of the steel pipe column is cut off, holes of the same size are opened at the round holes of the No. 3 and No. 4 column walls on the standard part, and 10 D16 plug weld holes are opened on each of the three column walls, with a vertical center distance of 105 mm and a horizontal center distance of 60 mm.

[0114] The present invention adopts an on-site bolt internal connection installation method to solve the technical problems existing in the prior art. The installation method of the present invention opens holes at the inflection point of the square pipe column. The inflection point is the midpoint. An internal strengthening connector is built in and welded and fixed to the square pipe column. Bolt holes and installation holes are left on the column wall and the strengthening connector. On site, hexagon socket head cap screws are used to pass through the installation holes to connect the inner walls of the opposite and adjacent columns to transfer shear force.

[0115] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0116] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The internal connection node of the steel pipe column is characterized in that: For the connection between cuboid modules, the cuboid modules include steel pipe columns (1) located at the four corners. Four cuboid modules are butted, and the four steel pipe columns (1) at the butting part are combined to form a middle column. The four steel pipe columns (1) forming the middle column are arranged in central symmetry and are connected through socket head cap screws (3). The steel pipe column (1) is a rectangular pipe, and its four walls are respectively a first pipe wall (1.1), a second pipe wall (1.2), a third pipe wall (1.3), and a fourth pipe wall (1.4) in the counterclockwise direction. A rectangular hole (1.5) is opened at the center of the first pipe wall (1.1). Four No. 3 docking holes (1.6) with a diameter of D57mm are evenly spaced along the longitudinal axis at the center of the third pipe wall (1.3). Four No. 4 docking holes (1.7) with a diameter of D35mm are evenly spaced along the longitudinal axis at the center of the fourth pipe wall (1.4). Five pairs of plug welding holes (1.8) with a diameter of D16mm are spaced on both sides of the centers of the second pipe wall (1.2), the third pipe wall (1.3), and the fourth pipe wall (1.4). A shear resistance strengthening connector (2) is fitted and inserted into the steel pipe column (1). The shear resistance strengthening connector (2) is inserted into the steel pipe column (1) through the rectangular hole (1.1). The shear resistance strengthening connector (2) is a rectangular pipe with a thickness of 12 - 15mm, and its four walls are respectively a first column wall (2.1), a second column wall (2.2), a third column wall (2.3), and a fourth column wall (2.4) in the counterclockwise direction; among them, the third column wall (2.3) faces inwards and the first column wall (2.1) faces outwards. Four No. 1 round holes (2.5) with a diameter of D35mm are evenly spaced along the longitudinal axis at the center of the first column wall (2.1). Two sides of the third column wall (2.3) are provided with through - length chamfers (2.6). Four No. 3 round holes (2.7) with a diameter of D57mm are evenly spaced along the longitudinal axis at the center of the third column wall. The No. 3 round holes (2.7) are mounting holes. Four No. 4 round holes (2.8) with a diameter of D35mm are evenly spaced along the longitudinal axis at the center of the fourth column wall (2.4); a washer and nut (2.9) with M30mm are welded to the inner side of the fourth column wall and are aligned with the No. 4 round hole (2.8). The No. 3 docking hole (1.6) is aligned with the No. 3 round hole (2.7) and has the same size. The No. 4 docking hole (1.7) is aligned with the No. 4 round hole (2.8) and has the same size. A washer (4) is spot - welded on the socket head cap screw (3). When connecting the steel pipe columns (1) of two adjacent cuboid modules, the socket head cap screw (3) passes through the No. 3 docking hole (1.6) and the No. 3 round hole (2.7) of the first cuboid module, penetrates into the first cuboid module, then horizontally passes forward through the rectangular hole (1.5) and the No. 1 round hole (2.5) of the first cuboid module and the No. 4 docking hole (1.7) and the No. 4 round hole (2.8) of the second cuboid module in sequence, and is inserted into the nut (2.9).

2. The inline joint within the steel pipe column according to claim 1, wherein: The diameter of the No. 3 round hole (2.7) is larger than the outer diameter of the M30mm washer, and the outer diameter of the washer is 56mm.

3. The inline joint of the steel pipe column according to claim 1, wherein: The center distances of the No. 1 round hole (2.5), the No. 3 round hole (2.7), and the No. 4 round hole (2.8) are all 105mm, and the edge distances are all 70mm. A washer (4) is arranged between the first pipe wall (1.1) of the first cuboid module and the socket head cap screw (3).

4. The inline joint inside the steel pipe column according to claim 1, characterized in that: The shear-resistant strengthening connector (2) is a cast steel part.

5. The inline joint inside the steel pipe column according to claim 1, wherein: Single bevels are opened on the upper and lower horizontal edges of the rectangular opening (1.5), and the angle is 45 degrees.

6. The installation method of the internal connection node of the steel pipe column according to claim 1, characterized in that, The steps are as follows: Step 1: Arrange the first cuboid module, the second cuboid module, the third cuboid module, and the fourth cuboid module in sequence. The steel pipe columns (1) of the four cuboid modules are arranged in central symmetry and combined to form a middle column. Step 2: Place the first cuboid module and insert the shear-resistant strengthening connector (2) into the steel pipe column (1). Step 3: Place the second cuboid module and insert the shear-resistant strengthening connector (2) into the steel pipe column (1). At the position of the steel pipe column (1) adjacent to the first cuboid module and the second cuboid module, use a socket head cap screw (3) of M30 together with a washer (4) with an outer diameter of 56 mm to pass through the third docking hole (1.6) and the third round hole (2.7) of the first cuboid module, penetrate into the interior of the first cuboid module, then horizontally pass forward through the rectangular opening (1.5) and the first round hole (2.5) of the first cuboid module, as well as the fourth docking hole (1.7) and the fourth round hole (2.8) of the second cuboid module, and insert them into the nut (2.9) to complete the connection between the first cuboid module and the second cuboid module. Step 4: Place the third cuboid module; repeat the above Step 2. At the position of the steel pipe column (1) adjacent to the second cuboid module and the third cuboid module, use a socket head cap screw (3) of M30 together with a washer (4) with an outer diameter of 56 mm to complete the connection between the second cuboid module and the third cuboid module. Step 5: Place the fourth cuboid module; repeat the above Step 2. At the position of the steel pipe column (1) adjacent to the third cuboid module and the fourth cuboid module, use a socket head cap screw (3) of M30 together with a washer (4) with an outer diameter of 56 mm to complete the connection between the third cuboid module and the fourth cuboid module. Step 6: Plug the construction opening of the steel pipe column (1) on site.

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