CN111644727B - Manufacturing method of combined steel column of transition section of tower crown of super high-rise building - Google Patents
Manufacturing method of combined steel column of transition section of tower crown of super high-rise building Download PDFInfo
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- CN111644727B CN111644727B CN202010614111.7A CN202010614111A CN111644727B CN 111644727 B CN111644727 B CN 111644727B CN 202010614111 A CN202010614111 A CN 202010614111A CN 111644727 B CN111644727 B CN 111644727B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
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Abstract
The invention discloses a manufacturing method of a combined steel column of a transition section of a tower crown of a super high-rise building, wherein the combined steel column comprises a vertically arranged steel column, an upper bracket and a lower bracket which are arranged on the steel column at intervals, and the steel column consists of an orthogonal H-shaped steel column section, a connection H-shaped steel column section, an oblique H-shaped steel column section and a rhombic steel column section from bottom to top in sequence; the center lines of the web plates of the orthogonal H-shaped steel column section, the connecting H-shaped steel column section and the oblique H-shaped steel column section are positioned on the same straight line; the lower bracket is arranged on the connecting H-shaped steel column section; and a left flange plate and a right flange plate are respectively arranged between the upper flange plate and the lower flange plate at the upper end of the oblique H-shaped steel column section, the two sides of the left flange plate and the right flange plate are respectively fixedly connected with the edge of the lower flange plate and the edge of the corresponding upper flange plate so as to respectively seal the left side and the right side of the upper flange plate and the lower flange plate, and the inclination angle of the rhombic steel column section corresponds to the inclination angle of the tower crown. The manufactured combined steel column can effectively realize the transition from the main structure of the tower to the crown structure of the tower.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a manufacturing method of a combined steel column of a transition section of a tower crown of a super high-rise building.
Background
With the further development of super high-rise buildings, more and more super high-rise buildings need to meet the structural design requirements through lateral force resisting structural systems such as outer frame columns, core barrels and reinforcing layer outrigger trusses. The main stressed structure system of the outer frame column is usually a large-section combined steel column, so that the whole tower can be ensured to exert the advantages of pressure resistance, torsion resistance, earthquake resistance and the like under the action of gravity or external force. The outer frame column is provided with the bracket connected with each layer of steel beam, and the bracket plays a role in the stability of connection between the components to a great extent. Considering the effect of building appearance, especially the appearance and effect of super high-rise tower crown, the corresponding change of the member section, such as the change of the section size and the section form, of partial members along with the increase of the main building height, so as to achieve the integral shape of the building and create good construction precondition for the subsequent process.
A project is positioned in the center of Yinchuan city, the total height of the building is 301 meters, and 66 floors of the ground are adopted, so that the sky city complex integrates high-end shopping, leisure catering, entertainment salons, business office and hotel reception. Above 57 layers of the building tower is a tower crown structure, and in order to ensure the curved surface modeling of the tower crown, structural steel columns are in a rhombic section form and are not wrapped with concrete. Therefore, when the tower main body is transited to the tower crown, the outer frame steel column needs to be converted from the original H-shaped section of the steel reinforced column into the rhombic section structure, but the section conversion is not used in the previous engineering and has no reference, so how to realize the conversion of the section form and the section size becomes a key difficulty in manufacturing the steel column at the transition section from the tower main body structure to the tower crown structure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for manufacturing a combined steel column of a transition section of a tower crown of a super high-rise building. The transition section combined steel column structure can effectively realize the transition from the tower main body structure to the tower crown structure, and creates good conditions for the final shape of the tower crown.
A manufacturing method of a combined steel column of a transition section of a tower crown of a super high-rise building comprises the steel column, an upper bracket and a lower bracket which are arranged on the steel column, wherein the upper bracket and the lower bracket are respectively provided with three brackets and are used for being fixedly connected with three corresponding steel beams in a one-to-one correspondence mode, the steel column is a combined steel column which consists of H-shaped steel made of an upper flange plate, a lower flange plate and a web plate which are long in the whole length and a rhombic steel column with a rhombic section, and the combined steel column sequentially comprises an orthogonal H-shaped steel column section, a connected H-shaped steel column section, an oblique H-shaped steel column section and a rhombic steel column section arranged above the oblique H-shaped steel column section from bottom to top; the central lines of the web plates of the orthogonal H-shaped steel column section, the connection H-shaped steel column section and the oblique H-shaped steel column section are positioned on the same straight line, the widths of the upper flange plate and the lower flange plate of the oblique H-shaped steel column section and the web plate of the oblique H-shaped steel column section are respectively greater than the widths of the upper flange plate and the lower flange plate of the orthogonal H-shaped steel column section and the web plate of the oblique H-shaped steel column section, and the widths of the upper flange plate and the lower flange plate of the connection H-shaped steel column section and the web plate of the oblique H-shaped steel column section are gradually increased from bottom to top; the lower layer bracket is arranged on the connecting H-shaped steel column section; a left flange plate and a right flange plate are respectively arranged between an upper flange plate and a lower flange plate at the upper end of the cross H-shaped steel column section, so that the rhombic steel column section with the rhombic section is formed at the upper end of the cross H-shaped steel column section, and the inclination angle of the rhombic steel column section corresponds to the inclination angle of the tower crown; the upper bracket layer is arranged on the diamond-shaped steel column section corresponding to the upper steel beam, and an inner partition plate is horizontally arranged in the diamond-shaped steel column section column corresponding to the upper flange and the lower flange of the upper bracket layer; the manufacturing method comprises the following steps:
(1) according to the design requirement of the transition section combined steel column, lofting and blanking an upper flange plate, a lower flange plate and a web plate which are all long, bending the upper flange plate and the lower flange plate into a certain angle according to the inclination angle of the tower crown transition section, then assembling, strictly controlling the included angle between the upper flange plate and the lower flange plate and the web plate during assembling, fixing the upper flange plate and the lower flange plate and the web plate by spot welding after being adjusted in place, checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling welding of the upper flange plate and the lower flange plate and the web plate by adopting automatic submerged arc welding;
(2) assembling a left flange plate or a right flange plate between an upper flange plate and a lower flange plate, strictly controlling the inclination angle during assembling, fixing the left flange plate or the right flange plate and the upper flange plate by spot welding during assembling, then checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling welding of the left flange plate or the right flange plate by adopting automatic submerged arc welding;
(3) assembling the inner partition plate, adopting single-side crevasse liner welding during welding, enabling the groove to face outwards, and adopting GMAW (gas metal arc welding) in a welding method; assembling and welding the inner partition plate, then assembling the right flange plate or the left flange plate, strictly controlling the inclination angle during assembling, fixing the left flange plate or the right flange plate with the upper flange plate and the lower flange plate during assembling, then checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling and welding of the right flange plate or the left flange plate by adopting automatic submerged arc welding;
(4) and assembling the brackets of the lower bracket and the upper bracket according to the position and the direction of each bracket which are designed in advance, thereby finishing the manufacture of the combined steel column.
Further, before assembling the left flange plate and the right flange plate, the rib adding ribs are welded firstly, the rib adding ribs are arranged on two side faces of the web plate corresponding to the lower end of the upper bracket, and the rib adding ribs are vertically arranged and the top ends of the rib adding ribs are welded and fixed with the just opposite inner partition plate.
Further, in the step (4), one of the lower-layer corbels is arranged on the web, the other two corbels are symmetrically arranged on the upper flange plate and the lower flange plate, two lateral surfaces of the web corresponding to the corbel flanges are respectively provided with a stiffening plate, the stiffening plates are horizontally arranged, and three lateral edges of the stiffening plates are respectively welded and fixed with the upper flange plate, the lower flange plate and the web correspondingly.
Furthermore, an installation lug plate is welded on the combined steel column, and the installation lug plate is welded at the lower end of the orthogonal H-shaped steel column section and is used for being fixedly connected with an installation lug plate of a lower section steel column, so that the orthogonal H-shaped steel column section and the lower section steel column are conveniently welded and fixed; two mounting ear plates are respectively fixed on the upper flange plate and the lower flange plate; during welding, spot welding is firstly carried out, GMAW welding is adopted, and the groove is a single-side 35-degree groove.
Furthermore, four lifting lug plates are welded on the combined steel column and welded at the upper end of the rhombic steel column section, and are respectively arranged on the upper flange plate, the lower flange plate, the left flange plate and the right flange plate; during welding, spot welding is firstly carried out, GMAW welding is adopted, and the groove is a single-side 35-degree groove.
Furthermore, a plurality of pegs are welded on the combined steel column and are uniformly distributed on upper and lower flange plates, left and right flange plates and web plates corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section, and the upper surface of each bracket flange; during manufacturing, the studs are welded in a planting mode according to the pre-designed arrangement and are perpendicularly welded to the upper flange plate, the lower flange plate, the left flange plate, the right flange plate and the web plate corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section, and the upper flanges of the brackets.
Compared with the prior art, the invention has the following beneficial effects:
1. the upper and lower flange plates and the web plate of the composite steel column manufactured by the method are made of the through-length steel plates, so that the butt joint of the composite steel column plates and the plates is effectively reduced, the welding seams are effectively reduced, the bearing capacity of the composite steel column in a super high-rise building is improved, and the transition from the main structure of the tower to the crown structure can be effectively realized.
2. The manufacturing method ensures the manufacturing precision and the appearance quality of the combined steel column from the aspects of the assembly and welding sequence, the welding method, the assembly process control and the like of the combined steel column, realizes the reasonable transition from the H-shaped section of the orthogonal H-shaped steel column section of the combined steel column to the rhombic section of the rhombic steel column section, and ensures the accuracy of the dimension of the rhombic section of the rhombic steel column section.
Drawings
Fig. 1-schematic structural view of the present invention.
Fig. 2-schematic diagram of the internal structure of the present invention.
Fig. 3-sectional conversion process diagram of the combined steel column.
Fig. 4-schematic view of upper flange plate structure.
Figure 5-schematic view of the lower flange plate structure.
Fig. 6-schematic view of the web structure.
FIG. 7-a flow chart of a method of making the present invention.
Wherein: 1-upper flange plate; 2-lower flange plate; 3-a web; 4-left flange plate; 5-right flange plate; 6-rib reinforcement; 7-lower corbel; 8-upper bracket; 9-lifting the lug plate; 10-mounting an ear plate; 11-a stud; 12-a stiffening plate; 13-inner partition plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, 2 and 3, a composite steel column structure for a transition section of a tower crown of a super high-rise building comprises a steel column, an upper bracket 8 and a lower bracket 7 which are arranged on the steel column, wherein the upper bracket 8 and the lower bracket 7 are respectively provided with three brackets and are used for being fixedly connected with three corresponding steel beams in a one-to-one correspondence manner, the steel column comprises a composite steel column which is composed of H-shaped steel made of an upper flange plate 1, a lower flange plate 2 and a web plate 3 which are long and a rhombic steel column with a rhombic cross section, and sequentially comprises an orthogonal H-shaped steel column section, a connecting H-shaped steel column section, an oblique H-shaped steel column section and a rhombic steel column section arranged above the oblique H-shaped steel column section from bottom to top; the central lines of the web plates of the orthogonal H-shaped steel column section, the connection H-shaped steel column section and the oblique H-shaped steel column section are positioned on the same straight line, the widths of the upper flange plate and the lower flange plate of the oblique H-shaped steel column section and the web plate of the oblique H-shaped steel column section are respectively greater than the widths of the upper flange plate and the lower flange plate of the orthogonal H-shaped steel column section and the web plate of the oblique H-shaped steel column section, and the widths of the upper flange plate and the lower flange plate of the connection H-shaped steel column section and the web plate of the oblique H-shaped steel column section are gradually increased from bottom to top; the lower-layer bracket 7 is arranged on the connected H-shaped steel column section; a left flange plate 4 and a right flange plate 5 are respectively arranged between an upper flange plate and a lower flange plate at the upper end of the diagonal H-shaped steel column section, so that the rhombic steel column section with the rhombic section is formed at the upper end of the diagonal H-shaped steel column section, and the inclination angle of the rhombic steel column section corresponds to the inclination angle of the tower crown; the web that the rhombus steel column section corresponds is in the corresponding upper and lower flange board length of reason, the upper bracket sets up on the rhombus steel column section that the upper girder steel corresponds to 8 upper and lower flanges of upper bracket are equipped with interior baffle 13 at the level in the rhombus steel column section post that corresponds.
The inclined angle of the rhombic steel column section is consistent with the inclined angle of the tower crown, the included angle between the upper flange plate and the lower flange plate of the oblique H-shaped steel column section and the included angle between the web plate of the upper flange plate and the lower flange plate of the oblique H-shaped steel column section are consistent with the inclined H-shaped steel column section, and the width of the orthogonal H-shaped steel column section of the tower main structure, which is transited to the upper flange plate and the lower flange plate and the web plate through the connecting steel column section, is consistent with the width of the oblique H-shaped steel column section.
The upper flange plate, the lower flange plate and the web plate of the orthogonal H-shaped steel column section, the connection H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section are made of full-length steel plates, and the mechanical property of the combined steel column is effectively guaranteed. Here, the narrow flanges of the orthogonal H-section steel column sections are transformed into diamond-shaped steel column sections with inclined wide flanges of diamond-shaped cross-section. The method is characterized in that firstly, a full-length upper flange plate and a full-length lower flange plate of an inclined wide flange are required to be manufactured, the thickness of the full-length upper flange plate and the full-length lower flange plate is 35mm, the change of the flange width and the change of the torsion angle are realized at the position of a lower bracket, namely, an included angle between a web plate and the flange plate of an orthogonal H-shaped steel column section is twisted for 90 degrees into an oblique H-shaped steel column section with the left side angle between the upper flange plate and the web plate being 97 degrees and the right side angle being 83 degrees. Lofting of the special-shaped plates is carried out by utilizing the BIM technology before blanking, angle torsion is carried out at the bracket position of the lower-layer beam after blanking, and detailed lofting diagrams of the upper flange plate, the lower flange plate and the web are respectively shown in fig. 4, fig. 5 and fig. 6.
During specific implementation, one of the brackets of the lower bracket 7 is arranged on the web 3, the other two brackets are symmetrically arranged on the upper flange plate 1 and the lower flange plate 2, two lateral surfaces of the web 3 corresponding to the bracket flange are respectively provided with a stiffening plate 12 which is as thick as the bracket flange, and the stiffening plate 12 is horizontally arranged and three lateral edges of the stiffening plate 12 are respectively and fixedly connected with the upper flange plate 1, the lower flange plate 2 and the web 3.
Therefore, the mechanical properties of the combined steel column at the joints of the steel beam and the steel column are effectively ensured by the stiffening plates.
During specific implementation, the two side faces of the web plate 2 corresponding to the lower end of the upper bracket 8 are respectively provided with a rib 6, the rib 6 is vertically arranged, and the top end of the rib is fixedly connected with the inner baffle 13 which is opposite to the rib 6.
In this embodiment, the conversion process of the composite steel column from bottom to top is shown in fig. 3, after the 500mm × 400mm × 30mm × 35mm orthogonal H-shaped section of the orthogonal H-shaped steel column section (as shown in fig. 3 a) is gradually widened by connecting the H-shaped steel column sections, the oblique crossing H-shaped section (as shown in fig. 3 b) with the inclination angle equal to that of the final rhombic section upper and lower flange plate sections is obtained by twisting the inclination angles of the upper and lower flange plates and the web plate; the oblique crossing H-shaped section extends upwards to the position 700mm below the position of the upper layer bracket and then is transited into a rhombic section with reinforced ribs, the section is 700mm multiplied by 35mm (figure 3, figure c); at the position of the upper bracket, the ribbed rhombic section with 700mm multiplied by 35mm is not extended upwards any more, namely the transition from the ribbed rhombic section to the final rhombic section (figure d in figure 3) is completed.
In specific implementation, the lower end of the orthogonal H-shaped steel column section is provided with the mounting lug plate 10 which is used for being fixedly connected with the mounting lug plate of the lower section steel column, so that the orthogonal H-shaped steel column section and the lower section steel column are conveniently welded and fixed; the number of the mounting ear plates 10 is two, and the two mounting ear plates are respectively fixed on the upper flange plate 1 and the lower flange plate 2.
During construction, bolts penetrate through the mounting lug plates of the orthogonal H-shaped steel column section and the lower steel column to fix the orthogonal H-shaped steel column section and the lower steel column, so that the combined steel column and the lower steel column are fixed, then welding is performed, the bolts are detached after welding is completed, and then the mounting lug plates are detached.
During specific implementation, the upper end of the rhombic steel column section is provided with four lifting lugs 9, and the four lifting lugs 9 are respectively arranged on the upper flange plate 1, the lower flange plate 2, the left flange plate 4 and the right flange plate 5.
The lifting lugs herein are used not only for lifting during lifting, but also as mounting lugs during assembly.
During specific implementation, a plurality of studs 11 are uniformly distributed on the upper surfaces of the flanges of the brackets and on the upper flange plates 1, the lower flange plates 2, the left flange plates 4, the right flange plates 5 and the web plates 3 corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section.
The arrangement of the stud is favorable for improving the bonding strength of the steel structure assembly and the concrete.
As shown in fig. 7, the manufacturing of the composite steel column for the transition section of the tower crown of the super high-rise building specifically includes the following steps:
(1) according to the design requirements of the transition section combined steel column, lofting and blanking an upper flange plate, a lower flange plate and a web plate which are all long, bending the upper flange plate and the lower flange plate into a certain angle according to the inclination angle of a tower crown, assembling, strictly controlling the included angle between the upper flange plate and the lower flange plate and the web plate during assembling, fixing the upper flange plate and the lower flange plate and the web plate by spot welding after adjusting the upper flange plate and the lower flange plate and the web plate in place, checking the assembling angle, performing backing welding by adopting GMAW (carbon dioxide gas arc welding) after the assembling angle is correct, and finally completing the assembling welding of the upper flange plate and the lower flange plate and the web plate by adopting automatic submerged arc welding, wherein the drawing (a) in figure 7 is shown;
when the H-shaped section steel column is assembled, the angles of the upper flange plate and the lower flange plate are firstly twisted, and then the assembly is carried out. In this embodiment, the left angle between the upper flange plate and the web of the cross-section H-beam column section is controlled to 97 ° and the right angle to 83 ° during assembly, and if there is deviation and adjustment in time, the control of the inclination angle directly relates to the accuracy of the final rhombus section inclination angle.
(2) Welding and fixing the reinforcing ribs on two side surfaces of the web plate, assembling the left flange plate or the right flange plate between the upper flange plate and the lower flange plate, strictly controlling the inclination angle during assembly, fixing the left flange plate or the right flange plate with the upper flange plate, the lower flange plate and the reinforcing ribs by spot welding during assembly, checking the assembly angle, performing backing welding by adopting GMAW (carbon dioxide gas shielded welding) after the assembly angle is correct, and finally completing the assembly welding of the left flange plate or the right flange plate by adopting automatic submerged arc welding (see figure (b) in figure 7);
(3) assembling the inner partition plate, adopting single-side break backing welding during welding, enabling the groove to face outwards, and adopting GMAW (carbon dioxide gas shielded welding) in a welding method, wherein the welding method is shown in a graph (c) in fig. 7;
(4) assembling and welding the inner partition plate, then assembling the right flange plate or the left flange plate, strictly controlling the inclination angle during assembling, fixing the left flange plate or the right flange plate, the upper flange plate, the lower flange plate and the reinforcing rib by spot welding during assembling, then checking the assembling angle, performing backing welding by adopting GMAW (carbon dioxide gas shielded welding) after the assembling angle is correct, and finally completing the assembling and welding of the right flange plate or the left flange plate by adopting automatic submerged arc welding (see figure (d) in figure 7);
(5) assembling the corbels of the lower layer corbel and the upper layer corbel and the stiffening plates corresponding to the lower layer corbel according to the position and the direction of each corbel of the deepened design, which is shown as a figure (e) in fig. 7;
(6) firstly, performing tack welding on a lifting lug plate and a mounting lug plate according to the positioning size on a deepening drawing, and then adopting GMAW (gas metal arc welding) welding, wherein the groove is a single-sided 35-degree groove; and (3) planting and welding the studs according to the arrangement of the deepening drawing, and vertically welding the studs on upper and lower flange plates, left and right flange plates and web plates corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section, and upper flanges of the brackets, thereby completing the manufacturing of the combined steel column, which is shown in a drawing (f) in fig. 7.
The manufacturing method ensures the manufacturing precision and the appearance quality of the combined steel column from the aspects of the assembling and welding sequence, the welding method, the process control and the like of the combined steel column, so that the H-shaped section of the combined steel column is reasonably transited to the rhombic section, and the accuracy of the section size of the upper rhombic section is ensured.
Finally, it should be noted that the above-mentioned examples of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (6)
1. The manufacturing method of the combined steel column of the transition section of the tower crown of the super high-rise building is characterized by comprising a steel column, an upper bracket and a lower bracket, wherein the upper bracket and the lower bracket are arranged on the steel column, the upper bracket and the lower bracket are respectively provided with three brackets and are used for being fixedly connected with three corresponding steel beams in a one-to-one correspondence manner, the steel column is a combined steel column consisting of H-shaped steel made of an upper flange plate, a lower flange plate and a web plate which are long in the whole length direction and a rhombic steel column with a rhombic cross section, and the combined steel column sequentially comprises an orthogonal H-shaped steel column section, a connected H-shaped steel column section, an oblique H-shaped steel column section and a rhombic steel column section arranged above the oblique H-shaped steel column section from bottom to top; the central lines of the web plates of the orthogonal H-shaped steel column section, the connection H-shaped steel column section and the oblique H-shaped steel column section are positioned on the same straight line, the widths of the upper flange plate and the lower flange plate of the oblique H-shaped steel column section and the web plate of the oblique H-shaped steel column section are respectively greater than the widths of the upper flange plate and the lower flange plate of the orthogonal H-shaped steel column section and the web plate of the oblique H-shaped steel column section, and the widths of the upper flange plate and the lower flange plate of the connection H-shaped steel column section and the web plate of the oblique H-shaped steel column section are gradually increased from bottom to top; the lower layer bracket is arranged on the connecting H-shaped steel column section; a left flange plate and a right flange plate are respectively arranged between an upper flange plate and a lower flange plate at the upper end of the cross H-shaped steel column section, so that the rhombic steel column section with the rhombic section is formed at the upper end of the cross H-shaped steel column section, and the inclination angle of the rhombic steel column section corresponds to the inclination angle of the tower crown; the upper bracket layer is arranged on the diamond-shaped steel column section corresponding to the upper steel beam, and an inner partition plate is horizontally arranged in the diamond-shaped steel column section column corresponding to the upper flange and the lower flange of the upper bracket layer; the manufacturing method comprises the following steps:
(1) according to the design requirement of the transition section combined steel column, lofting and blanking an upper flange plate, a lower flange plate and a web plate which are all long, bending the upper flange plate and the lower flange plate into a certain angle according to the inclination angle of the tower crown transition section, then assembling, strictly controlling the included angle between the upper flange plate and the lower flange plate and the web plate during assembling, fixing the upper flange plate and the lower flange plate and the web plate by spot welding after being adjusted in place, checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling welding of the upper flange plate and the lower flange plate and the web plate by adopting automatic submerged arc welding;
(2) assembling a left flange plate or a right flange plate between an upper flange plate and a lower flange plate, strictly controlling the inclination angle during assembling, fixing the left flange plate or the right flange plate and the upper flange plate by spot welding during assembling, then checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling welding of the left flange plate or the right flange plate by adopting automatic submerged arc welding;
(3) assembling the inner partition plate, adopting single-groove backing welding during welding, wherein the groove faces outwards, and adopting GMAW (gas metal arc welding) in a welding method; assembling and welding the inner partition plate, then assembling the right flange plate or the left flange plate, strictly controlling the inclination angle during assembling, fixing the left flange plate or the right flange plate with the upper flange plate and the lower flange plate during assembling, then checking the assembling angle, performing backing welding by adopting GMAW after the assembling angle is correct, and finally completing the assembling and welding of the right flange plate or the left flange plate by adopting automatic submerged arc welding;
(4) and assembling the brackets of the lower bracket and the upper bracket according to the position and the direction of each bracket which are designed in advance, thereby finishing the manufacture of the combined steel column.
2. The method for manufacturing the composite steel column for the transition section of the tower crown of the super high-rise building according to claim 1, wherein before the left flange plate and the right flange plate are assembled, the reinforcing ribs are welded, the reinforcing ribs are arranged on two side surfaces of the web plate corresponding to the lower end of the bracket on the upper layer, the reinforcing ribs are vertically arranged, and the top ends of the reinforcing ribs are welded and fixed with the inner partition plate which is opposite to the reinforcing ribs.
3. The method for manufacturing the composite steel column for the transition section of the tower crown of the super high-rise building according to claim 1, wherein in the step (4), one of the lower-layer corbels is arranged on the web, the other two corbels are symmetrically arranged on the upper flange plate and the lower flange plate, two side faces of the web corresponding to the corbel flanges are respectively provided with a stiffening plate, the stiffening plates are horizontally arranged, and three side edges of each stiffening plate are respectively welded and fixed with the upper flange plate, the lower flange plate and the web.
4. The method for manufacturing the composite steel column for the transition section of the tower crown of the super high-rise building according to claim 1, wherein a mounting lug plate is welded to the composite steel column, and the mounting lug plate is welded to the lower end of the orthogonal H-shaped steel column section and is used for being fixedly connected with the mounting lug plate of the lower steel column, so that the orthogonal H-shaped steel column section and the lower steel column are conveniently welded and fixed; two mounting ear plates are respectively fixed on the upper flange plate and the lower flange plate; during welding, spot welding is firstly carried out, GMAW welding is adopted, and the groove is a single-side 35-degree groove.
5. The method for manufacturing the composite steel column for the transition section of the tower crown of the super high-rise building according to claim 1, wherein four lifting lugs are welded on the composite steel column and are welded at the upper end of the diamond-shaped steel column section, and are respectively arranged on the upper flange plate, the lower flange plate and the left flange plate; during welding, spot welding is firstly carried out, GMAW welding is adopted, and the groove is a single-side 35-degree groove.
6. The method for manufacturing the composite steel column for the transition section of the tower crown of the super high-rise building according to claim 1, wherein a plurality of pegs are welded on the composite steel column, and are uniformly distributed on upper and lower flange plates, left and right flange plates and webs corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the diamond-shaped steel column section, and the upper surfaces of the flanges of the brackets; during manufacturing, the studs are welded in a planting mode according to the pre-designed arrangement and are perpendicularly welded to the upper flange plate, the lower flange plate, the left flange plate, the right flange plate and the web plate corresponding to the outer surfaces of the orthogonal H-shaped steel column section, the oblique H-shaped steel column section and the rhombic steel column section, and the upper flanges of the brackets.
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| CN115889937B (en) * | 2023-03-09 | 2023-05-02 | 云南建投钢结构股份有限公司 | Welding construction method for steel structure beam, column and wall encircling combined node member |
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| CN102400518A (en) * | 2011-11-18 | 2012-04-04 | 江苏沪宁钢机股份有限公司 | Section-variable crossed circular tube switching steel column and manufacturing method thereof |
| CN104805961B (en) * | 2015-03-10 | 2017-03-08 | 中建钢构江苏有限公司 | Oblique bracket girders layer steel column of slab abnormity and preparation method thereof |
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