Steel latticed column-solid web multi-section combined type supporting structure and mounting method

Abstract

The invention aims at providing the four-limb steel latticed column-solid web multi-section combined type supporting structure which is suitable for scenes such as large-span venue special-shaped columns and the like and is light in structure weight, high in toughness and high in space integration and the mounting method. The system comprises a transfer joint, a plurality of steel latticed columns fixedly connected with the bottom of the transfer joint and used for bearing loads, and a multi-cavity steel column fixedly connected with the other end of the transfer joint and used for bearing loads. One face of the bottom plate is connected with the steel latticed columns, the reinforcing rib set is fixedly connected with the other face of the bottom plate, the top plate is fixedly connected with the upper portion of the reinforcing rib set and used for being connected with the multi-cavity steel column, arc-shaped plates beneficial to load transmission are formed at the four corners of a reinforcing rib plate, and each arc-shaped plate and the reinforcing rib set form a load transmission space. The method is applied to the technical field of building steel structure engineering, the multi-stage changing stair effect of the roof can be built, and the fifth vertical face of an urban landmark building is enriched.

Description

Technical Field

[0001] The present invention relates to the technical field of building steel structure engineering, and in particular to a steel lattice column-solid web multi-section combined support structure and an installation method thereof. Background Art

[0002] In the field of building steel structures, steel columns are the main load-bearing components, and their structural form and performance directly affect the overall stability and economy of the building.

[0003] In recent years, in order to adapt to complex load conditions, some projects have tried to adopt upper and lower special-shaped composite column structures, such as a segmented design with box columns on the upper part and lattice columns on the lower part. At present, the upper and lower special-shaped composite column structures still have significant defects: 1. The force transmission path of the upper and lower special-shaped column connection nodes is unclear, which is prone to stress concentration, resulting in a sudden change in stiffness in the node area, affecting the overall structural force performance; 2. The cavity-lattice transition section of the traditional hybrid column is complex in structure, the on-site welding workload is large, and precision control is difficult, resulting in extended construction period and increased cost; 3. The excessively large cross-section of the upper box column may encroach on the building's usable space, and the unreasonable arrangement of the lower lattice column tie bars may easily affect the passage of equipment pipelines, making it difficult to take into account both structural performance and building functional requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a steel lattice column-solid multi-segment combined support structure and installation method suitable for scenarios such as large-span venues with special-shaped columns, which has a lightweight structure, high toughness and high spatial integration.

[0005] The technical solution adopted by the present invention is as follows: the present invention comprises a conversion node, a plurality of steel lattice columns fixedly connected to the bottom of the conversion node for bearing loads, and a multi-cavity steel column fixedly connected to the other end of the conversion node for bearing loads;

[0006] The conversion node includes a bottom plate connected to several of the steel lattice columns on one side, a reinforcing rib group fixedly connected to the other side of the bottom plate, and a top plate fixedly connected to the upper part of the reinforcing rib group for connection to the multi-cavity steel column. The four corners of the reinforcing rib plate form arc-shaped plates that help transfer loads. Each of the arc-shaped plates forms a load transfer space with the reinforcing rib group. At least two of the load transfer spaces arranged along the diagonal line are provided with connecting ribs that can improve the bearing capacity and reduce stress concentration.

[0007] Further, the stiffening rib group includes a number of first gusset plates fixedly connected to the bottom plate along the X-axis direction, and a number of second gusset plates fixedly connected to the bottom plate along the Y-axis direction. A first stiffening rib is provided between two adjacent first gusset plates, and a second stiffening rib is provided between two adjacent second gusset plates. One end of each arc-shaped plate is fixedly connected to the corresponding first gusset plate, and the other end of each arc-shaped plate is fixedly connected to the corresponding second gusset plate.

[0008] Further, a first protruding rib for improving the bearing capacity and reducing stress concentration is provided in the middle of each first stiffening rib, and a second protruding rib for improving the bearing capacity and reducing stress concentration is provided in the middle of each second stiffening rib.

[0009] Further, the multi-chamber steel column includes a first chamber column, a second chamber column, and a third chamber column. The first chamber column is fixedly connected to the upper surface of the top plate, the second chamber column is fixedly connected to one side of the upper surface of the first chamber column, and the third chamber column is connected to the upper surface of the second chamber column.

[0010] Further, the centroids of the first chamber column, the second chamber column, and the third chamber column are located within the upper surface of the top plate.

[0011] Further, the first chamber column has an "L" - shaped structure, and the second chamber column has a "mu" - shaped or "day" - shaped structure.

[0012] Further, the heights of the first chamber column, the second chamber column, and the third chamber column decrease in sequence.

[0013] Further, the steel lattice column is a four - limb round steel column. The upper surface of each steel lattice column is fixedly welded to the corresponding bottom plate, and each arc - shaped plate transfers the load above to the corresponding steel lattice column through the bottom plate.

[0014] Further, a gusset plate is fixedly connected to the side surface of the conversion joint. The upper end of the gusset plate is fixedly connected to the top plate, and the lower end of the gusset plate is fixedly connected to the bottom plate.

[0015] Further, the installation method includes the following steps:

[0016] S1. Assemble the stiffening rib group. A number of the first gusset plates and a number of the second gusset plates form a "well" - shaped structure, and the joints are welded by full - penetration welding. A number of arc - shaped plates are respectively welded and fixed at the four corners to form a load - transfer space;

[0017] S2. Assembling the steel lattice columns, wherein the reinforcing rib group is fixed to one side of the base plate by full penetration welding, and each of the steel lattice columns is fixed to the other side of the base plate by welding;

[0018] S3. Assemble the conversion node, weld and fix each portion of the top plate to the upper edge of the reinforcing rib group, weld and fix the upper ends of several of the enclosure panels to the top plate, and weld and fix the lower ends of several of the enclosure panels to the bottom plate;

[0019] S4. Assemble the multi-cavity steel columns, wherein the first cavity column is welded and fixed to the upper surface of the top plate, and the second cavity column and the third cavity column are welded and fixed to the upper surface of the top plate in sequence.

[0020] The beneficial effects of the present invention are as follows: since the present invention adopts a composite structural design, the lower section of the steel lattice column is composed of a four-limb circular steel column section, and the four-limb circular steel columns are symmetrically distributed along the center of the section, which can better bear the load transmitted by the conversion node and have good overall bending resistance. The steel lattice column and the upper multi-cavity steel column need to realize the load transfer through a conversion node that can effectively transmit force. The conversion node is connected by a cross-type plate system to form a spatial lattice frame with balanced bidirectional lateral stiffness. The stress conditions are analyzed by three-dimensional modeling. The results show that the two diagonal load transfer spaces belong to the areas that bear the most loads. When bearing the load transmitted from above, by using an arc plate on the outer edge of the load transfer space, the size and spatial position of the arc plate are the same as those of the lower steel column. Therefore, when subjected to force from above, the conversion node can directly transfer the load to the circular lattice column through the arc plate. The mechanical transmission path is simple and direct. The additional setting of connecting ribs located in the load transfer space can further improve the load bearing capacity and reduce stress concentration.

[0021] The segmented design of multi-cavity columns can create a multi-level trapezoidal shape. Throughout the life cycle of the building, it can be used as a stepped roof shape or flexibly changed into a space for personnel activities, enriching the flexibility of the building's fifth facade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is an exploded view of the conversion node and steel lattice column of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the reinforcing rib group of the present invention;

[0025] Figure 4 It is an exploded view of the multi-cavity steel column of the present invention.

[0026] In the figure: 1. Transfer node; 11. Bottom plate; 12. Top plate; 13. Enclosure; 14. Connecting rib; 15. First gusset plate; 16. Second gusset plate; 17. Curved plate; 18. Second stiffening rib; 19. First stiffening rib; 2. Steel lattice column; 3. Multi-cavity steel column; 31. First cavity column; 32. Second cavity column; 33. Third cavity column; 4. First protruding rib; 5. Second protruding rib; 6. Load transfer space. DETAILED DESCRIPTION

[0027] like Figures 1 to 4 As shown, in this embodiment, the present invention includes a conversion node 1, a plurality of steel lattice columns 2 fixedly connected to the bottom of the conversion node 1 for bearing loads, and a multi-cavity steel column 3 fixedly connected to the other end of the conversion node 1 for bearing loads;

[0028] The conversion node 1 includes a bottom plate 11 connected to several of the steel lattice columns 2 on one side, a reinforcing rib group fixedly connected to the other side of the bottom plate 11, and a top plate 12 fixedly connected to the upper part of the reinforcing rib group for connecting to the multi-cavity steel column 3. The four corners of the reinforcing rib plate form arc-shaped plates 17 that help transfer loads. Each of the arc-shaped plates 17 forms a load transfer space 6 with the reinforcing rib group. At least two of the load transfer spaces arranged along the diagonal line are provided with connecting ribs 14 that can improve the bearing capacity and reduce stress concentration.

[0029] The composite structure design is adopted. The lower section of the steel lattice column 2 is composed of four circular steel column sections. The four circular steel columns are symmetrically distributed along the center of the section, which can better bear the load transmitted by the conversion node and has good overall bending resistance. The steel lattice column 2 and the upper multi-cavity steel column 3 need to transfer the load through the conversion node 1 that can effectively transmit force. The conversion node 1 is connected by a cross-type plate system to form a spatial lattice frame with balanced bidirectional lateral stiffness. The stress situation is analyzed through three-dimensional modeling. The results show that the two diagonal load transfer spaces 6 are the areas that bear the most load. When bearing the load transmitted from above, the load transfer spaces 6 located at the four corners of the load transfer space 6 transfer the load downward. The size and spatial position of the arc plate 17 correspond to the lower circular cross-section steel lattice column 2. Therefore, when subjected to force from above, the conversion node 1 can directly transfer the load to the circular lattice column 2 through the arc plate 17. The mechanical transmission path is simple and direct. The provision of connecting ribs 14 located in the load transfer space 6 can further improve the load bearing capacity and reduce stress concentration.

[0030] The three-segment design of the multi-cavity steel columns creates a multi-level trapezoidal shape. Throughout the building's life cycle, it can be used as a stepped roof or flexibly converted into a space for personnel activities, enriching the flexibility of the building's fifth facade.

[0031] The modular conversion node 1 replaces the traditional welding process and combines it with standardized cavity excision rules to solve the industry pain points of low processing precision and long construction period of special-shaped columns. The upper and lower sections are rigidly connected through the modular conversion node 1.

[0032] The top plate is divided into multiple different plates welded to the upper part of the reinforcing ribs to facilitate on-site construction and welding.

[0033] In this embodiment, the reinforcing rib group includes a plurality of first gusset plates 15 fixedly connected to the base plate 11 along the X-axis direction, and a plurality of second gusset plates 16 fixedly connected to the base plate 11 along the Y-axis direction. Two adjacent first gusset plates 15 are provided with first stiffening ribs 19, and two adjacent second gusset plates 16 are provided with second stiffening ribs 18. One end of each of the curved plates 17 is fixedly connected to the corresponding first gusset plate 15, and the other end of each of the curved plates 17 is fixedly connected to the corresponding second gusset plate 16.

[0034] The inclination angle of the cross-stitch plate and the spacing between the steel lattice columns 2 are designed according to the principle of shear stiffness matching to ensure that the ratio of the moment of inertia of the stitch plate system and the single-limb component meets the integral stability threshold, and the force transmission is more evenly distributed. When subjected to external unilateral force, the arc-shaped plate 17 located on the periphery transmits the force to the corresponding steel lattice column 2 below. The first stitch plate 15 and the second stitch plate 16 located on the inner side of the load transfer space 6 are subjected to greater force. At this time, the connecting rib 14 is used to strengthen the mechanical transmission path of the first stitch plate 15 and the second stitch plate 16, so that the received force is transmitted to the bottom plate 11, making the overall structure of the conversion node lightweight. The diameter of the arc-shaped plate 17 is equal to the diameter of the steel lattice column 2. When the conversion node 1 is subjected to force from above, the arc-shaped plate 17 can directly transmit the stress to the steel lattice column 2, thereby optimizing the mechanical transmission route.

[0035] In this embodiment, the middle part of each first stiffening rib 19 is provided with a first protruding rib 4 that can improve the bearing capacity and reduce stress concentration, and the middle part of each second stiffening rib 18 is provided with a second protruding rib 5 that can improve the bearing capacity and reduce stress concentration.

[0036] In this embodiment, the multi-cavity steel column 3 includes a first cavity column 31, a second cavity column 32 and a third cavity column 33. The first cavity column 31 is fixedly connected to the upper surface of the top plate 12, the second cavity column 32 is fixedly connected to one side of the upper surface of the first cavity column 31, and the third cavity column 33 is connected to the upper surface of the second cavity column 32.

[0037] Based on the load gradient distribution law, the upper box-shaped column section is segmented and topologically optimized. By finite element analysis, the stress concentration coefficient and stiffness reduction rate after cavity excision are controlled. The outer contour of the first cavity column 31 is a regular polygon, and multiple independent chambers are divided inside by longitudinal partitions. The second cavity column 32 forms an asymmetric geometric contour by locally excising part of the cavity, and the continuous cavity walls of the key force transmission paths are retained. The third cavity column 33 further optimizes the cavity layout to form a compact cross-sectional shape, and a smooth transition is formed between the boundary of the excision area and the retained cavity wall.

[0038] In this embodiment, the centroids of the first cavity column 31, the second cavity column 32, and the third cavity column 33 are located within the upper surface of the top plate 12.

[0039] In this embodiment, the first cavity column 31 has an "L" shape structure, and the second cavity column 32 has a "mu" shape or "day" shape.

[0040] In this embodiment, the heights of the first cavity column 31, the second cavity column 32, and the third cavity column 33 decrease in sequence.

[0041] In this embodiment, the steel lattice column 2 is a four-leg round steel column. The upper surface of each steel lattice column 2 is fixedly welded to the corresponding bottom plate 11. Each arc-shaped plate 17 transfers the upper load to the corresponding steel lattice column 2 through the bottom plate 11. The four-leg round steel column is formed by equidistantly arranging four steel pipes with circular cross-sections. The four steel pipes form a square structure. The upper surface of each steel pipe is correspondingly arranged below the corresponding arc-shaped plate 17 to directly transfer the upper load to the steel pipe and optimize the mechanical transmission route.

[0042] In this embodiment, the side surfaces of the conversion node 1 are fixedly connected with enclosing plates 13. The upper ends of the enclosing plates 13 are fixedly connected to the top plate 12, and the lower ends of the enclosing plates 13 are fixedly connected to the bottom plate 11.

[0043] In this embodiment, the installation method includes the following steps:

[0044] S1. Assemble the reinforcing rib group. A number of the first gusset plates 15 and a number of the second gusset plates 16 are in a "well" shape structure, and the joints are welded by full penetration. A number of the arc-shaped plates 17 are respectively welded and fixed at the four corners to form a load transfer space 6;

[0045] S2. Assemble the steel lattice column 2. The reinforcing rib group is fixedly welded to one side of the bottom plate 11 by full penetration, and each steel lattice column 2 is fixedly welded to the other side of the bottom plate 11 by welding;

[0046] S3. Assemble the conversion node 1 by welding and fixing the parts of the top plate 12 to the upper edge of the reinforcing rib group, welding and fixing the upper ends of several of the enclosure panels 13 to the top plate 12, and welding and fixing the lower ends of several of the enclosure panels 13 to the bottom plate 11;

[0047] S4, assembling the multi-cavity steel column 3, the first cavity column 31 is welded and fixed to the upper surface of the top plate 12, and the second cavity column 32 and the third cavity column 33 are welded and fixed to the upper surface of the top plate 12 in sequence.

[0048] Although the embodiments of the present invention are described with practical solutions, they do not limit the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A steel lattice column-solid web multi-segment combined support structure, characterized by: It includes a conversion node (1), several steel lattice columns (2) fixedly connected to the bottom of the conversion node (1) for bearing loads, and a multi-chamber steel column (3) fixedly connected to the other end of the conversion node (1) for bearing loads; The conversion node (1) includes a bottom plate (11) connected to several of the steel lattice columns (2) on one side, a reinforcing rib group fixedly connected to the other side of the bottom plate (11), a top plate (12) fixedly connected to the upper part of the reinforcing rib group for connecting the multi-chamber steel column (3). Arc-shaped plates (17) that help transfer loads are formed at the four corners of the reinforcing rib plates. Each arc-shaped plate (17) and the reinforcing rib group form a load transfer space (6). Connecting ribs (14) that can improve the bearing capacity and reduce stress concentration are provided in at least two of the load transfer spaces arranged diagonally.

2. The steel lattice column-solid web multi-segment combined support structure according to claim 1, characterized in that: The reinforcing rib group includes several first batten plates (15) fixedly connected to the bottom plate (11) along the X-axis direction, and several second batten plates (16) fixedly connected to the bottom plate (11) along the Y-axis direction. A first stiffening rib (19) is provided between two adjacent first batten plates (15), and a second stiffening rib (18) is provided between two adjacent second batten plates (16). One end of each arc-shaped plate (17) is fixedly connected to the corresponding first batten plate (15), and the other end of each arc-shaped plate (17) is fixedly connected to the corresponding second batten plate (16).

3. The steel lattice column-solid web multi-segment combined support structure according to claim 2, characterized in that: A first protruding rib (4) that can improve the bearing capacity and reduce stress concentration is provided in the middle of each first stiffening rib (19), and a second protruding rib (5) that can improve the bearing capacity and reduce stress concentration is provided in the middle of each second stiffening rib (18).

4. The steel lattice column-solid web multi-segment combined support structure according to claim 1, characterized in that: The multi-chamber steel column (3) includes a first chamber column (31), a second chamber column (32), and a third chamber column (33). The first chamber column (31) is fixedly connected to the upper surface of the top plate (12), the second chamber column (32) is fixedly connected to one side of the upper surface of the first chamber column (31), and the third chamber column (33) is connected to the upper surface of the second chamber column (32).

5. The steel lattice column-solid web multi-segment combined support structure according to claim 4, characterized in that: The centroids of the first chamber column (31), the second chamber column (32), and the third chamber column (33) are located within the upper surface of the top plate (12).

6. The steel lattice column-solid web multi-segment combined support structure according to claim 4, characterized in that: The first chamber column (31) has an "L" - shaped structure, and the second chamber column (32) has a "mu" - shaped or "day" - shaped structure.

7. The steel lattice column-solid web multi-segment combined support structure according to claim 4, characterized in that: The heights of the first chamber column (31), the second chamber column (32), and the third chamber column (33) decrease in sequence.

8. The steel lattice column-solid web multi-segment combined support structure according to claim 2, characterized in that: The steel lattice column (2) is a four - limb round steel column. The upper surface of each steel lattice column (2) is fixedly welded to the corresponding bottom plate (11). Each arc-shaped plate (17) transfers the load above to the corresponding steel lattice column (2) through the bottom plate (11).

9. The steel lattice column-solid web multi-segment combined support structure according to claim 1, characterized in that: The side surfaces of the conversion nodes (1) are fixedly connected to enclosures (13), the upper ends of the enclosures (13) are fixedly connected to the top plate (12), and the lower ends of the enclosures (13) are fixedly connected to the bottom plate (11).

10. A method for installing the steel lattice column-solid web multi-segment combined support structure according to any one of claims 1 to 9, characterized in that: The installation method comprises the following steps: S1, assembling the reinforcing rib group, a plurality of the first gusset plates (15) and a plurality of the second gusset plates (16) in a "well"-shaped structure, welding the joints by full penetration, and a plurality of the arc-shaped plates (17) are respectively welded and fixed at the four corners to form a load transfer space (6); S2, assembling the steel lattice columns (2), wherein the reinforcing rib group is fixed to one side of the base plate (11) by full penetration welding, and each of the steel lattice columns (2) is fixed to the other side of the base plate (11) by welding; S3, assembling the conversion node (1), welding and fixing each part of the top plate (12) to the upper edge of the reinforcing rib group, welding and fixing the upper ends of several of the enclosure plates (13) to the top plate (12), and welding and fixing the lower ends of several of the enclosure plates (13) to the bottom plate (11); S4. Assemble the multi-cavity steel column (3), wherein the first cavity column (31) is welded and fixed to the upper surface of the top plate (12), and the second cavity column (32) and the third cavity column (33) are welded and fixed to the upper surface of the top plate (12) in sequence.

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