Vertical connection node structure of partially coated steel-concrete combination column

Abstract

The utility model relates to a vertical connection node structure of a partially coated steel-concrete combination column, which is characterized in that a horizontal partition plate is preset at the bottom of an upper column, the horizontal partition plate is welded with the column in a factory, an upper column web plate can be reserved or cut off in a connection area, and a longitudinal steel bar and a vertical stiffening plate are welded on two sides of the horizontal partition plate of the upper column; it is guaranteed that the centers of the vertical stiffening plates and the centers of the longitudinal steel bars are aligned or deviated within a controllable range; when the upper column and the lower column are spliced on the construction site, only the flanges of the upper column and the lower column need to be welded in a butt joint mode, and the vertical stiffening plate of the upper column and the top partition plate of the lower column are welded. The thickness of the horizontal partition plate and the thickness of the vertical stiffening plate are designed and calculated, the reliability of force transmission of the horizontal partition plate and the thickness of the vertical stiffening plate are verified, and two connecting structures of a grouting-free joint and a grouting formwork-free joint can be achieved. Compared with the prior art, on-site construction procedures can be reduced, and construction efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of assembled buildings, and in particular to a vertical connection node structure of a partially covered steel-concrete composite column. Background Art

[0002] Partially encapsulated steel-concrete composite columns are composite components formed by arranging longitudinal steel bars, tie bars and stirrups inside the main steel frame (usually H-shaped steel), and then filling concrete on both sides of the web. Partially encapsulated steel-concrete composite columns have small cross-sectional dimensions, high bearing capacity, and reduce the fire and corrosion protection area of ​​the main steel frame, with good economic benefits. They are currently widely used in residential buildings.

[0003] When partially encapsulated steel-concrete composite columns are vertically connected, the encapsulated concrete participates in the vertical force of the structure. Therefore, when partially encapsulated steel-concrete composite columns are prefabricated, a space for the steel frame splicing at the node is reserved without pouring concrete. When splicing the nodes at the construction site, the flanges of the upper and lower columns are usually butt-welded, the webs are butt-welded or the external cover plates are bolted, the longitudinal steel bars are overlap-welded, and then the formwork is supported in the node area. After pouring concrete, the formwork is removed to form the structure. This connection structure and method has complex procedures, involves many types of work, is difficult to manage on site, and the quality of post-grouting compaction is difficult to control, and the nodes are prone to safety hazards.

[0004] The utility model patent with announcement number CN210530135U discloses "a vertical joint structure of partially covered steel-concrete columns". When prefabricating PEC columns, this patent reserves a section at the joint without pouring concrete, and welds partitions on both sides of the web to separate the area; when connecting at the construction site, the webs of the upper and lower PEC columns are first fixed with bolts through the web splicing plates, and then the joints of the upper and lower columns are welded and sealed with post-welded steel plates, and no concrete is poured in the joint area. This patent replaces the splicing area with poured concrete with post-welded steel plates to bear the force, ensuring the strength and rigidity of the node area in the vertical and horizontal directions, and realizing the construction site without formwork. However, in this patent, since the webs of the upper and lower columns at the splicing nodes need to be connected on site, the post-weld steel plates need to be welded after the webs are connected, and the construction site operation steps are slightly complicated; moreover, the post-weld steel plates need to be welded to the flanges of the columns and the upper and lower partitions on four sides respectively on site, and there are many welds on site, making the welding operation difficult. Therefore, there is still room for optimization to further simplify the process. Utility Model Content

[0005] The utility model discloses a vertical connection node structure of a partially covered steel-concrete composite column, which can realize formwork-free construction site and reduce construction procedures.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A partially covered steel-concrete composite column vertical connection node structure, comprising:

[0008] Upper column; the main steel frame inside the upper column is an upper H-shaped steel, upper ear plates are arranged on the flanges on both sides of the upper H-shaped steel, upper longitudinal steel bars are arranged on both sides of the web of the upper H-shaped steel, the bottom surface of the web of the upper H-shaped steel is higher than the bottom surfaces of the flanges on both sides of the upper H-shaped steel, an upper horizontal partition is arranged below the bottom surface of the web of the upper H-shaped steel, the upper horizontal partition is respectively welded and connected with the flange, web and upper longitudinal steel bars of the upper H-shaped steel, the bottom surface of the upper horizontal partition is parallel to the web and respectively provided with vertical stiffening plates, the center of the vertical stiffening plate is aligned with the center of the upper longitudinal steel bar up and down, the top of the vertical stiffening plate is pre-welded to the bottom surface of the upper horizontal partition, the two sides of the vertical stiffening plate are pre-welded to the flanges of the upper H-shaped steel, and the two sides of the web of the upper part of the upper horizontal partition are pre-cast with concrete;

[0009] Lower column; the main steel frame inside the lower column is a lower H-shaped steel, lower ear plates are arranged on the flanges on both sides of the lower H-shaped steel, lower longitudinal steel bars are arranged on both sides of the web of the lower H-shaped steel, a lower horizontal diaphragm is welded to the top of the lower H-shaped steel, the lower horizontal diaphragm is respectively welded to the flange, web and lower longitudinal steel bars of the lower H-shaped steel, and concrete is pre-cast on both sides of the web at the lower part of the lower horizontal diaphragm;

[0010] The upper column and the lower column are vertically spliced, the upper ear plate and the lower ear plate are connected on site by bolts through a connecting plate, the upper column flange and the lower column flange are welded on site, the bottom of the vertical stiffening plate and the top of the lower horizontal partition are welded on site, and the center of the vertical stiffening plate is also aligned up and down with the center of the lower longitudinal steel bar.

[0011] Furthermore, a grouting channel and an air outlet channel are pre-embedded in the concrete on the upper horizontal partition of the upper column, the bottom of the grouting channel and the bottom of the air outlet channel are both connected to the space below the upper horizontal partition, the pre-embedded grouting holes of the grouting channel are exposed, and the pre-embedded air outlet holes of the air outlet channel are exposed, and grouting concrete is formed on-site by grouting between the upper and lower horizontal partitions along the pre-embedded grouting holes.

[0012] The utility model also discloses another partially coated steel-concrete composite column vertical connection node structure, comprising:

[0013] Upper column; the main steel frame inside the upper column is an upper H-shaped steel, upper ear plates are arranged on the flanges on both sides of the upper H-shaped steel, upper longitudinal steel bars are arranged on both sides of the web of the upper H-shaped steel, the bottom surface of the flange of the upper H-shaped steel is flush with the bottom surface of the web, upper horizontal partitions are welded on both sides of the web, the bottom surface of the upper horizontal partition is higher than the bottom surface of the web of the upper H-shaped steel, the upper horizontal partition is welded to the flange, web and upper longitudinal steel bars of the upper H-shaped steel respectively, the bottom surfaces of the upper horizontal partitions on both sides of the web are respectively parallel to the web and welded with vertical stiffening plates, the center of each side of the vertical stiffening plate is aligned with the center of the corresponding side upper longitudinal steel bar, the top of each side of the vertical stiffening plate is pre-welded to the bottom surface of the upper horizontal partition on the corresponding side, the two sides of the vertical stiffening plate are respectively welded to the flange, and the upper part of the upper horizontal partition on each side is pre-cast with concrete;

[0014] Lower column; the main steel frame inside the lower column is a lower H-shaped steel, lower ear plates are arranged on the flanges on both sides of the lower H-shaped steel, lower longitudinal steel bars are arranged on both sides of the web of the lower H-shaped steel, a lower horizontal diaphragm is welded to the top of the lower H-shaped steel, and the lower horizontal diaphragm is respectively welded to the flange, web and lower longitudinal steel bar of the lower H-shaped steel, and concrete is pre-cast at the lower part of each side of the lower horizontal diaphragm;

[0015] The upper column and the lower column are vertically spliced, the upper ear plate and the lower ear plate are connected on site by bolts through a connecting plate, the upper column flange and the lower column flange are welded on site, the bottom of the web of the upper column is in contact with the top of the lower horizontal partition of the lower column but does not need to be connected, the bottom of the vertical stiffening plate on each side is welded on site to the top of the lower horizontal partition on the corresponding side, and the center of the vertical stiffening plate on each side is also aligned up and down with the center of the lower longitudinal steel bar on the corresponding side.

[0016] Furthermore, grouting channels and air outlet channels are pre-embedded in the concrete on the upper part of the upper horizontal partition on each side of the upper column, the bottom of the grouting channel and the bottom of the air outlet channel on each side are connected with the space below the upper horizontal partition on the corresponding side, the pre-embedded grouting holes of the grouting channel are exposed, and the pre-embedded air outlet holes of the air outlet channel are exposed, and grouting concrete is formed on-site by grouting between the upper and lower horizontal partitions on the corresponding side along the pre-embedded grouting holes on each side.

[0017] The utility model transmits the load of the web, the concrete between the flanges and the longitudinal steel bars in the partially covered steel-concrete composite column by reasonably designing the size of the horizontal partition and the vertical stiffening plate, and whether to choose to grout at the splicing node, so as to meet the specification requirements. The horizontal partition and the vertical stiffening plate are pre-welded with the column in the factory. The webs of the upper and lower columns do not need to be connected at the construction site. It is only necessary to weld the vertical stiffening plate pre-welded on the upper column with the horizontal partition of the lower column. Compared with the existing technology, the entire construction process is greatly reduced, the construction efficiency is improved, the number of on-site construction work types is reduced, and it is easier to manage on-site. By reasonably designing the size of the horizontal partition and the vertical stiffening plate, the node grouting can be cancelled to achieve a "grouting-free node" when safety is guaranteed by design verification, which helps to reduce on-site wet operations; even if the "grouting node" form is selected, there is no need to support the formwork on site, the designed grouting structure does not have leakage, the gravity pressure grouting is easier to be dense, and the node quality is easier to ensure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the vertical connection node structure of the composite column in Example 1;

[0019] Figure 2 for Figure 1 Middle AA section view;

[0020] Figure 3 for Figure 1 Middle BB section view;

[0021] Figure 4 This is a schematic diagram of the vertical connection node structure of the composite column in Example 2;

[0022] Figure 5 for Figure 2 Middle CC section view;

[0023] Figure 6 for Figure 2 Middle DD section view;

[0024] Figure 7 This is a schematic diagram of the structure of the upper column welded with the upper horizontal partition in Example 1;

[0025] Figure 8 This is a schematic diagram of the structure of the upper column welded with the upper horizontal partition in Example 3;

[0026] Fig. 9 It is a structural schematic diagram of the lower column welding the lower horizontal partition in each embodiment;

[0027] Fig.10 This is a schematic diagram of the structure after the upper column is welded with a vertical stiffening plate in Example 1;

[0028] Fig.11This is a schematic diagram of the structure after the upper column in Example 3 is welded with a vertical stiffening plate.

[0029] Description of Figure Numbers:

[0030] 1. Ear plate; 2. Longitudinal reinforcement; 3. Horizontal partition; 31. Upper horizontal partition; 32. Lower horizontal partition; 4. Vertical stiffening plate; 5. Bolts; 6. Connecting plate; 7. Pre-buried grouting hole; 8. Pre-buried air outlet; 9. Grouting concrete. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Embodiment 1: A partially covered steel-concrete composite column vertical connection node structure, such as Figures 1 to 3 As shown, it mainly includes an upper column, a lower column, ear plates 1 arranged on the flanges of the upper and lower columns, longitudinal steel bars 2 arranged on the sides of the webs of the upper and lower columns, horizontal partitions 3 respectively arranged on the upper and lower columns, and vertical stiffening plates 4 arranged between the horizontal partitions 3 of the upper and lower columns. The upper column and the lower column are both partially covered steel-concrete columns (i.e., PEC columns), and the structures of the two are similar. The main steel frames inside are all H-shaped steels, and ear plates 1 are respectively arranged on the flanges on both sides of the H-shaped steel. Threaded holes are opened on the ear plates 1, and longitudinal steel bars 2 are respectively arranged on both sides of the web of the H-shaped steel. Concrete is pre-cast on both sides of the web of the H-shaped steel. In order to more clearly illustrate the structural differences between the upper column and the lower column during prefabrication, the structures of the upper and lower columns are introduced below.

[0033] The main steel frame inside the upper column is the upper H-shaped steel, and upper ear plates are respectively arranged on the flanges on both sides of the upper H-shaped steel, and upper longitudinal steel bars are respectively arranged on both sides of the web of the upper H-shaped steel. Figure 7 As shown, the lower part of the web of the upper H-shaped steel can be cut off so that the bottom surface of the web is higher than the bottom surface of the flanges on both sides of the upper H-shaped steel after cutting. An upper horizontal partition 31 is arranged below the bottom surface of the web of the upper H-shaped steel, and the upper horizontal partition 31 is welded to the flanges on both sides of the upper H-shaped steel, the bottom surface of the web and the upper longitudinal steel bars on both sides. Fig.10 As shown, at both ends of the bottom surface of the upper horizontal partition 31, a vertical stiffening plate 4 is welded in parallel to the web direction, so that the longitudinal center of each vertical stiffening plate 4 is aligned with the longitudinal center of the upper longitudinal reinforcement on the corresponding side, ensuring continuous force transmission. The top of each vertical stiffening plate 4 is pre-welded to the bottom surface of the upper horizontal partition 31 on the corresponding side in the factory, and the two sides of each vertical stiffening plate 4 are pre-welded to the flange in the factory, so that the bottom of the vertical stiffening plate 4 is suspended, and concrete is pre-cast on both sides of the web of the upper part of the upper horizontal partition 31 in the factory.

[0034] The main steel frame inside the lower column is the lower H-shaped steel, and lower ear plates are respectively arranged on the flanges on both sides of the lower H-shaped steel, and lower longitudinal steel bars are respectively arranged on both sides of the web of the lower H-shaped steel. Fig. 9 As shown, a lower horizontal partition 32 is welded to the top of the lower H-shaped steel, and the lower horizontal partition 32 is respectively welded to the flange, web and lower longitudinal steel bars on both sides of the lower H-shaped steel, and concrete is pre-cast on both sides of the web at the lower part of the lower horizontal partition 32 in the factory. The main difference between the upper column and the lower column is that the bottom of the upper horizontal partition 31 of the upper column is pre-welded with a vertical stiffening plate 4 in the factory, and the three sides of the vertical stiffening plate 4 are welded in the factory. Only the bottom of the vertical stiffening plate 4 needs to be welded at the construction site; while there is no need to pre-weld the vertical stiffening plate 4 on the lower column. In addition, the welding positions of the upper horizontal partition 31 on the upper column and the lower horizontal partition 32 on the lower column are different.

[0035] When the upper column and the lower column of the above structure are vertically spliced ​​on site, the upper ear plate and the lower ear plate are first fixed together on site through the connecting plate 6 with bolts 5; then the flange of the upper column and the flange of the lower column are welded and fixed on site, and the bottom of the vertical stiffening plate 4 and the top of the lower horizontal partition 32 are welded and fixed on site. When connecting, pay attention to aligning the longitudinal center of the vertical stiffening plate 4 with the longitudinal center of the lower longitudinal steel bar as much as possible, and control the deviation within a controllable range. After the connection of the upper column and the lower column is completed, the ear plate 1 is cut off, and finally the node is treated with fireproof and anti-corrosion, and the entire node construction is completed.

[0036] This embodiment belongs to the "grouting-free node". There is no need to pour concrete at the construction site of the joint area between the upper column and the lower column. As long as the thickness of the horizontal partition 3 and the vertical stiffening plate 4 is designed and verified to ensure the reliability of force transmission and safety, it is possible to choose not to grout the joint. The "grouting-free node" can reduce wet work at the construction site, reduce on-site garbage generated by formwork, and help improve the construction environment.

[0037] Embodiment 2: This embodiment is a variation of the design scheme based on Embodiment 1. Embodiment 1 is a "grouting-free node", while this embodiment is a "grouting-free formwork node". Figures 4 to 6As shown, if it is necessary to ensure higher safety, it is also possible to choose to grout the cavity between the upper horizontal partition 31 and the lower horizontal partition 32 described in Example 1 to form grouting concrete 9 on the construction site. When the "grouting formwork-free node" solution is selected, when the upper column is prefabricated in the factory, it is necessary to pre-embed the grouting channel and the air outlet channel on the upper part of the upper horizontal partition 31, and open corresponding holes on the upper horizontal partition 31 so that the bottom of the grouting channel and the bottom of the air outlet channel extend into the space below the upper horizontal partition 31 along the openings, and then pour concrete on the upper part of the upper horizontal partition 31 to ensure that the pre-embedded grouting holes 7 of the grouting channel are exposed and the pre-embedded air outlet holes 8 of the air outlet channel are exposed. The remaining structural designs not specifically described in this embodiment can be set according to Example 1. After the connection of the upper column and the lower column is completed on the construction site as described in Example 1, grouting concrete 9 is finally formed on site between the upper and lower horizontal partitions along the pre-embedded grouting holes 7.

[0038] Embodiment 3: This embodiment is similar in structure to Embodiment 1, except that: in Embodiment 1, the web in the joint area below the upper horizontal partition 31 is not continuous, that is, there is no web of the upper H-shaped steel in the joint area between the upper horizontal partition 31 and the lower horizontal partition 32; while in this embodiment, Figure 8 As shown in FIG. 1 , the flange bottom surface of the upper H-shaped steel is flush with the bottom surface of the web. The upper horizontal partition plate 31 welded on the upper column is composed of two pieces, which are arranged on both sides of the web. The bottom surface of the upper horizontal partition plate 31 on each side is higher than the bottom surface of the web of the upper H-shaped steel. Fig.11 As shown. The rest of the parts not specifically described can be set with reference to the structure of Example 1. In the node splicing area given in this embodiment (i.e., between the upper horizontal partition 31 and the lower horizontal partition 32), the web of the upper column is retained. When splicing, the bottom of the web of the upper column contacts the top of the lower horizontal partition 32 of the lower column, but no additional connection is required. Force can be transmitted through the retained web of the upper column in contact with the lower horizontal partition 32 of the lower column.

[0039] Embodiment 4: This embodiment is a design variation based on Embodiment 3. Embodiment 3 is a "grouting-free node", while this embodiment is a "grouting-free formwork node". This embodiment is the same as the pre-buried grouting channel and air outlet channel scheme given in Embodiment 2, that is, the setting of the pre-buried grouting channel and air outlet channel specifically described in Embodiment 2 is combined with the content given in Embodiment 3, which is the scheme described in this embodiment. Therefore, this embodiment omits excessive introduction.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A partially covered steel-concrete composite column vertical connection node structure, comprising an upper column and a lower column, characterized in that: The main steel frame inside the upper column is an upper H-shaped steel, upper ear plates are arranged on the flanges on both sides of the upper H-shaped steel, upper longitudinal steel bars are arranged on both sides of the web of the upper H-shaped steel, the bottom surface of the web of the upper H-shaped steel is higher than the bottom surfaces of the flanges on both sides of the upper H-shaped steel, an upper horizontal partition is arranged below the bottom surface of the web of the upper H-shaped steel, the upper horizontal partition is respectively welded and connected with the flange, web and upper longitudinal steel bars of the upper H-shaped steel, the bottom surface of the upper horizontal partition is parallel to the web and respectively provided with vertical stiffening plates, the center of the vertical stiffening plates is aligned with the center of the upper longitudinal steel bars up and down, the top of the vertical stiffening plates is pre-welded to the bottom surface of the upper horizontal partition, the two sides of the vertical stiffening plates are pre-welded to the flanges of the upper H-shaped steel, and concrete is pre-cast on both sides of the web of the upper part of the upper horizontal partition; The main steel frame inside the lower column is a lower H-shaped steel, lower ear plates are arranged on the flanges on both sides of the lower H-shaped steel, lower longitudinal steel bars are arranged on both sides of the web of the lower H-shaped steel, a lower horizontal diaphragm is welded to the top of the lower H-shaped steel, the lower horizontal diaphragm is respectively welded to the flange, web and lower longitudinal steel bars of the lower H-shaped steel, and concrete is pre-cast on both sides of the web at the bottom of the lower horizontal diaphragm; The upper column and the lower column are vertically spliced, the upper ear plate and the lower ear plate are connected on site by bolts through a connecting plate, the upper column flange and the lower column flange are welded on site, the bottom of the vertical stiffening plate and the top of the lower horizontal partition are welded on site, and the center of the vertical stiffening plate is also aligned up and down with the center of the lower longitudinal steel bar.

2. A partially covered steel-concrete composite column vertical connection node structure according to claim 1, characterized in that: A grouting channel and an air outlet channel are pre-embedded in the concrete on the upper horizontal partition of the upper column, the bottom of the grouting channel and the bottom of the air outlet channel are both connected to the space below the upper horizontal partition, the pre-embedded grouting holes of the grouting channel are exposed, and the pre-embedded air outlet holes of the air outlet channel are exposed, and grouting concrete is formed on-site by grouting between the upper and lower horizontal partitions along the pre-embedded grouting holes.

3. A partially covered steel-concrete composite column vertical connection node structure, comprising an upper column and a lower column, characterized in that: The main steel frame inside the upper column is an upper H-shaped steel, upper ear plates are arranged on the flanges on both sides of the upper H-shaped steel, upper longitudinal steel bars are arranged on both sides of the web of the upper H-shaped steel, the bottom surface of the flange of the upper H-shaped steel is flush with the bottom surface of the web, upper horizontal partitions are welded on both sides of the web, the bottom surface of the upper horizontal partition is higher than the bottom surface of the web of the upper H-shaped steel, the upper horizontal partition is respectively welded to the flange, web and upper longitudinal steel bars of the upper H-shaped steel, the bottom surfaces of the upper horizontal partitions on both sides of the web are respectively parallel to the web and welded with vertical stiffening plates, the center of each side of the vertical stiffening plate is aligned with the center of the corresponding side upper longitudinal steel bar, the top of each side of the vertical stiffening plate is pre-welded to the bottom surface of the upper horizontal partition on the corresponding side, the two sides of each side of the vertical stiffening plate are respectively welded to the flange, and the upper part of the upper horizontal partition on each side is pre-cast with concrete; The main steel frame inside the lower column is a lower H-shaped steel, lower ear plates are arranged on the flanges on both sides of the lower H-shaped steel, lower longitudinal steel bars are arranged on both sides of the web of the lower H-shaped steel, and a lower horizontal diaphragm is welded to the top of the lower H-shaped steel. The lower horizontal diaphragm is respectively welded to the flange, web and lower longitudinal steel bar of the lower H-shaped steel, and concrete is pre-cast at the lower part of each side of the lower horizontal diaphragm; The upper column and the lower column are vertically spliced, the upper ear plate and the lower ear plate are connected on site by bolts through a connecting plate, the upper column flange and the lower column flange are welded on site, the bottom of the web of the upper column is in contact with the top of the lower horizontal partition of the lower column but does not need to be connected, the bottom of the vertical stiffening plate on each side is welded on site to the top of the lower horizontal partition on the corresponding side, and the center of the vertical stiffening plate on each side is also aligned up and down with the center of the lower longitudinal steel bar on the corresponding side.

4. A partially covered steel-concrete composite column vertical connection node structure according to claim 3, characterized in that: Grouting channels and air outlet channels are pre-buried in the concrete on the upper part of the upper horizontal partition on each side of the upper column. The bottom of the grouting channel and the bottom of the air outlet channel on each side are connected with the space below the upper horizontal partition on the corresponding side. The pre-buried grouting holes of the grouting channel are exposed, and the pre-buried air outlet holes of the air outlet channel are exposed. Grouting concrete is formed on-site along the pre-buried grouting holes on each side to the upper and lower horizontal partitions on the corresponding side.

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