A prefabricated frame toughness steel combined connection node

Abstract

The present invention discloses an assembled frame toughness steel composite connection node, comprising an upper steel anchor plate, a lower steel anchor plate, a steel joint, a prefabricated RC column, and a RC beam. A cross-shaped steel plate is fixed above the upper steel anchor plate. The longitudinal reinforcement of the RC prefabricated column above the core area of ​​the beam and column vertically penetrates the upper steel anchor plate and is locked with bolts. The upper steel anchor plate is located at the bottom end of the RC prefabricated column above the core area of ​​the beam and column. An anchor rod is fixed below the lower steel anchor plate, penetrating the core area of ​​the beam and column. The longitudinal reinforcement of the RC prefabricated column below the core area of ​​the beam and column vertically penetrates the core area of ​​the beam and column and the lower steel anchor plate and is locked with bolts. The upper and lower steel anchor plates are welded together via a steel joint, and the interior space between the upper and lower steel anchor plates and the steel joint is cast with concrete using formwork. The present invention not only staggers the connection of the column longitudinal reinforcement away from the core area of ​​the beam and column, but also ensures the continuous arrangement of the column longitudinal reinforcement in the core area of ​​the beam and column, resulting in convenient and efficient construction and reliable connection quality.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and in particular to a prefabricated frame toughness steel combined connection node. Background Art

[0002] With the development of economy and technology, the advantages of cast-in-place construction mode have gradually disappeared. Compared with the traditional cast-in-place construction mode, prefabricated buildings have the characteristics of high component quality, energy saving and environmental protection, shortened construction period, and manpower saving. Therefore, prefabricated buildings are gradually becoming the key development direction of my country's construction industry in the future.

[0003] The connection nodes of reinforced concrete frame structures are where the upper and lower RC columns, RC beams, and floor slabs intersect. During the structural design process, reinforcement is generally required, so the steel bars at the frame structure nodes are very densely crisscrossed. As an assembled concrete frame structure, RC precast columns, RC precast beams, precast floor slabs and other components are all equipped with reserved steel bars. How to gather these steel bars in one place without mutual collision and to ensure reasonable load-bearing is a major issue that must be considered. It is also the primary problem that needs to be solved during factory prefabrication and on-site lifting and assembly construction. Due to the dense steel bars in the node area, when the RC precast column longitudinal bars are connected one by one through sleeve grouting in the node, there are often problems such as small construction space, high connection difficulty, low construction efficiency, and difficulty in ensuring construction quality. Therefore, a prefabricated frame toughness steel composite connection node is provided. Summary of the Invention

[0004] The purpose of the present invention is to propose a prefabricated frame toughness steel combined connection node, which has reliable connection and seismic performance and is suitable for use in high-intensity areas. It plays an extremely important role and significance in the application and development of prefabricated buildings in high-intensity areas in my country.

[0005] The technical problem to be solved is: due to the dense steel bars in the node area, when the RC prefabricated column longitudinal bars are connected one by one through sleeve grouting in the node, there is often a small construction space, great connection difficulty, low construction efficiency, and difficulty in ensuring construction quality.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides an assembled frame toughness steel composite connection node, comprising an upper steel anchor plate, a lower steel anchor plate, a steel joint, a RC prefabricated column, and an RC beam. The cross-sectional shapes of the upper steel anchor plate and the lower steel anchor plate both match the cross-sectional shape of the RC prefabricated column.

[0008] A cross-shaped steel plate is fixed above the upper steel anchor plate, and the upper steel anchor plate is arranged at the bottom end of the RC prefabricated column above the core area of ​​the beam and column. The longitudinal reinforcement of the RC prefabricated column passes through the upper steel anchor plate and is locked by bolts, and the cross-shaped steel plate above the upper steel anchor plate is embedded in the RC prefabricated column;

[0009] The bottom end of the lower steel anchor plate is correspondingly arranged at the top of the beam-column core area, and an anchor rod is fixed below it. The longitudinal reinforcement of the RC prefabricated column below the beam-column core area vertically penetrates the beam-column core area and the lower steel anchor plate and is locked by bolts, and the anchor rod below the lower steel anchor plate is buried in the RC prefabricated column;

[0010] Diagonal bracing steel bars are fixedly arranged between the column longitudinal bars and the beam longitudinal bars in the core area of ​​the RC prefabricated columns and RC beams;

[0011] The upper steel anchor plate and the lower steel anchor plate are vertically aligned and spliced ​​together through steel joints and welded at the joints, and the internal spaces of the upper steel anchor plate and the lower steel anchor plate are concreted by supporting formwork.

[0012] The present invention provides an assembled frame toughness steel combined connection node. Furthermore, the cross-shaped steel plate is formed by splicing four identical rectangular steel plates in a welding and fixing manner, and is pre-embedded in the RC prefabricated column in the core area of ​​the beam and column, and the height of the cross-shaped steel plate is not less than the size of the long side of the RC prefabricated column cross section.

[0013] The present invention provides an assembled frame toughness steel combined connection node. Furthermore, the anchor rod includes anchor bars and anchor plates. The anchor bars and anchor plates are pre-embedded and arranged in the RC prefabricated column in the core area of ​​the beam and column in a welding and fixing manner, and the length of the anchor rod is greater than 30 times the diameter of the steel bar.

[0014] The present invention provides an assembled frame toughness steel combined connection node. Further, the steel joint includes an I-shaped steel plate and a groove butt weld, and the I-shaped steel plate can also be a cylindrical or T-shaped steel plate.

[0015] The present invention provides an assembled frame toughness steel combined connection node. Further, the bolt includes a nut and a washer, and the nut and the washer are fixed to the lower steel anchor plate and the column longitudinal reinforcement by welding.

[0016] The present invention provides an assembled frame toughness steel combined connection node. Furthermore, the nuts and washers are replaced by circular or rectangular nuts and steel plates of the same material.

[0017] The present invention provides an assembled frame toughness steel combined connection node. Further, the anchor bars and anchor plates are arranged on the same central horizontal line of the lower steel bar anchor plate, and the anchor bars and anchor plates are respectively arranged one on each side of the center position of the lower steel bar anchor plate.

[0018] The present invention provides an assembled frame toughness steel combined connection node. Furthermore, the lower steel bar anchor plate is a circular or polygonal steel plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention realizes the effective connection of the upper and lower solid prefabricated column longitudinal reinforcements in the core area of ​​the beam and column by welding the upper and lower steel bar anchor plates connected to each other. It can not only stagger the connection of the column longitudinal reinforcements in the core area of ​​the beam and column, avoiding the one-by-one connection of the column longitudinal reinforcements in the core area of ​​the beam and column with a small construction space, but also ensure the through arrangement of the column longitudinal reinforcements in the core area of ​​the beam and column. The middle cavity of the upper and lower steel bar anchor plates and the core area of ​​the beam and column are integrally grouted by cast-in-place concrete. The construction is convenient and efficient, the connection quality and seismic performance are reliable, and it is suitable for use in high-intensity areas.

[0021] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural diagram of a prefabricated frame toughness steel combined connection node according to the present invention;

[0023] Figure 2 The present invention provides a schematic diagram of the three-dimensional structure of a prefabricated frame toughness steel combined connection node after removing part of the structure.

[0024] Reference numerals:

[0025] 1. RC precast column; 101. Column longitudinal reinforcement; 2. RC beam; 201. Beam main reinforcement; 3. Upper reinforcement anchor plate; 4. Cross-shaped steel plate; 5. Lower reinforcement anchor plate; 6. Anchor rod; 601. Anchor bar; 602. Anchor plate; 7. Steel joint; 701. I-shaped steel plate; 702. Groove butt weld; 8. Diagonal bracing steel; 9. Bolt; 901. Nut; 902. Washer. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments are only used to explain the present invention and are not used to limit the scope of the present invention. Figure 1-2 , the preferred embodiments of the present invention are further described in detail, wherein Figure 1-2 In order to more clearly show the internal structure of beams and columns, some beam and column reinforcements are not shown:

[0027] like Figure 1-2As shown, the present invention discloses an assembled frame toughness steel combined connection node, including an upper steel anchor plate 3, a lower steel anchor plate 5, a steel joint 7, an RC prefabricated column 1 and an RC beam 2. The cross-sectional shapes of the upper steel anchor plate 3 and the lower steel anchor plate 5 both match the cross-sectional shape of the RC prefabricated column 1.

[0028] A cross-shaped steel plate 4 is fixed above the upper steel anchor plate 3. The upper steel anchor plate 3 is arranged at the bottom end of the RC prefabricated column 1 above the core area of ​​the beam and column. The inner column longitudinal reinforcement 101 of the RC prefabricated column 1 passes through the upper steel anchor plate 3 and is locked by bolts 9. The cross-shaped steel plate 4 above the upper steel anchor plate 3 is buried in the RC prefabricated column 1.

[0029] The bottom end of the lower steel anchor plate 5 is correspondingly arranged at the top of the beam-column core area, and an anchor rod 6 is fixed below it. The inner column longitudinal reinforcement 101 of the RC prefabricated column 1 below the beam-column core area vertically penetrates the beam-column core area and the lower steel anchor plate 5 and is locked by bolts 9, and the anchor rod 6 below the lower steel anchor plate 5 is buried in the RC prefabricated column 1.

[0030] Diagonal bracing steel bars 8 are fixedly provided between the column longitudinal bars 101 and the beam longitudinal bars 201 in the core areas of the RC prefabricated columns 1 and the RC beams 2 .

[0031] The upper steel anchor plate 3 and the lower steel anchor plate 5 are vertically aligned and spliced ​​together through the steel joint 7 and welded at the joint, and the internal space of the upper steel anchor plate 3 and the lower steel anchor plate 5 is concreted by supporting formwork.

[0032] like Figure 2 As shown, the cross-shaped steel plate 4 is formed by splicing four identical rectangular steel plates by welding and fixing, and is pre-embedded in the RC prefabricated column 1 in the core area of ​​the beam and column, and the height of the cross-shaped steel plate is not less than the size of the long side of the cross section of the prefabricated column 1.

[0033] Anchor rods 6 consist of anchor bars 601 and anchor plates 602. Both are welded and embedded within the precast RC columns 1 in the core area of ​​the beams and columns. The length of the anchor bars 6 is generally greater than 30 times the diameter of the rebar. The anchor bars 601 and anchor plates 602 are positioned on the same horizontal line as the center of the lower rebar anchor plate 5. The lower rebar anchor plate 5 can be made of a circular or polygonal steel plate of the same material. The anchor bars 601 and anchor plates 602 are positioned one on each side of the center of the lower rebar anchor plate 5.

[0034] The steel joint 7 includes an I-shaped steel plate 701 and a groove butt weld 702, and the I-shaped steel plate 701 can be replaced by a cylindrical or T-shaped steel plate.

[0035] The bolt 9 includes a nut 901 and a washer 902, which are fixed to the lower steel anchor plate 5 and the column longitudinal reinforcement 101 by welding. The nut 901 and the washer 902 can be replaced by circular or rectangular nuts and steel plates of the same material.

[0036] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A prefabricated frame toughness steel combined connection node, characterized by: It comprises an upper steel bar anchor plate (3), a lower steel bar anchor plate (5), a steel joint (7), an RC prefabricated column (1) and an RC beam (2), wherein the cross-sectional shapes of the upper steel bar anchor plate (3) and the lower steel bar anchor plate (5) match the cross-sectional shape of the RC prefabricated column (1); A cross-shaped steel plate (4) is fixed above the upper steel anchor plate (3), and the upper steel anchor plate (3) is arranged at the bottom end of the RC prefabricated column (1) above the core area of ​​the beam column. The inner column longitudinal reinforcement (101) of the RC prefabricated column (1) passes through the upper steel anchor plate (3) and is locked by bolts (9), and the cross-shaped steel plate (4) above the upper steel anchor plate (3) is embedded in the RC prefabricated column (1); The bottom end of the lower steel anchor plate (5) is arranged correspondingly at the top of the beam-column core area, so that the connection of the column longitudinal reinforcement is staggered from the beam-column core area, and an anchor rod (6) is fixed below it. The column longitudinal reinforcement (101) in the RC prefabricated column (1) below the beam-column core area vertically penetrates the beam-column core area and the lower steel anchor plate (5) and is locked by bolts (9), so that the column longitudinal reinforcement in the beam-column core area is set through, and the anchor rod (6) below the lower steel anchor plate (5) is buried in the RC prefabricated column (1); Diagonal bracing steel bars (8) are fixedly provided between the column longitudinal bars (101) and the beam longitudinal bars (201) in the core areas of the RC prefabricated columns (1) and RC beams (2); The upper steel anchor plate (3) and the lower steel anchor plate (5) are vertically aligned and spliced ​​together through a steel joint (7) and welded together at the joint, and the internal space of the upper steel anchor plate (3) and the lower steel anchor plate (5) is concreted by formwork casting.

2. The assembled frame ductile steel joint according to claim 1, characterized in that: The cross-shaped steel plate (4) is formed by splicing four identical rectangular steel plates in a welding and fixing manner, and is pre-embedded in the RC prefabricated column (1) in the core area of ​​the beam and column, and the height of the cross-shaped steel plate is not less than the size of the long side of the cross section of the RC prefabricated column (1).

3. The assembled frame ductile steel joint according to claim 1, characterized in that: The anchor rod (6) comprises an anchor bar (601) and an anchor plate (602), and the anchor bar (601) and the anchor plate (602) are both pre-embedded and arranged in the RC prefabricated column (1) in the core area of ​​the beam and column in a welding fixed manner, and the length of the anchor rod (6) is greater than 30 times the diameter of the steel bar.

4. The assembled frame ductile steel joint according to claim 1, characterized in that: The steel joint (7) comprises an I-shaped steel plate (701) and a groove butt weld (702), and the I-shaped steel plate (701) can also be a cylindrical or field-shaped steel plate.

5. The assembled frame ductile steel joint according to claim 1, characterized in that: The bolt (9) comprises a nut (901) and a washer (902), and the nut (901) and the washer (902) are fixed to the lower steel bar anchor plate (5) and the column longitudinal reinforcement (101) by welding.

6. The assembled frame ductile steel joint according to claim 5, characterized in that: The nut (901) and the washer (902) are replaced by circular or rectangular nuts and steel plates of the same material.

7. The assembled frame ductile steel joint according to claim 3, characterized in that: The anchor bars (601) and the anchor plates (602) are arranged on the same central horizontal line of the lower steel bar anchor plate (5), and the anchor bars (601) and the anchor plates (602) are respectively arranged one on each side of the central position of the lower steel bar anchor plate (5).

8. The assembled frame ductile steel joint according to claim 1, characterized in that: The lower steel bar anchor plate (5) is a circular or polygonal steel plate.

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