Node structure connected between concrete structure and steel structure and building

Abstract

The utility model discloses a node structure connected between a concrete structure and a steel structure and a building, the node structure is arranged in a column body of the concrete structure at the lower part, and a finished steel support connected with the steel structure at the upper part is arranged at the top of the node structure; the joint structure comprises profile steel, end sealing plates and longitudinal bar connecting plates. A node structure composed of profile steel, an end sealing plate and a longitudinal bar connecting plate is arranged in a lower concrete structure, an upper steel structure transmits horizontal force and vertical force into the profile steel through a finished product support and the end sealing plate, and then the horizontal force and the vertical force are transmitted into an upper section of a column body through the profile steel. Due to the fact that the whole profile steel and the upper section of the column body are poured together, horizontal force is firstly transmitted to the finished steel support, the end socket plate and the profile steel from the upper steel structure and then transmitted to the column body from the profile steel, and on the premise that stress and deformation of the finished steel support meet design requirements, the load of the upper steel frame structure can be effectively transmitted to the built-in profile steel of the lower reinforced concrete structure. And the force transmission path is direct, and the structure is safe and reliable. The shear capacity of the connecting node is improved, and the capacity of transmitting large horizontal load of the node structure is improved; in addition, the node structure is simple, convenient to construct and reliable in force transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a node structure connected between a concrete structure and a steel structure and a building. Background Art

[0002] Large public buildings often utilize long-span steel roof / floor structures to achieve the effect of a large, column-free space. Their lower supporting structures are often concrete. The common connection between the lower concrete structure and the upper steel structure is through prefabricated steel supports. During structural design, embedded components are typically placed within the lower concrete vertical support structure. The bottom of the prefabricated steel supports are connected to the embedded components, and the top is connected to the lower chord of the steel roof / floor. However, when the horizontal forces transmitted from the upper steel structure to the lower concrete structure are large, especially when the upper steel structure is a heavy-duty floor / roof, the design of embedded components is difficult due to the limited number of anchor bars that can effectively transmit the force. Utility Model Content

[0003] In response to the above-mentioned defects in the existing technology, a node structure and building connected between a concrete structure and a steel structure are provided. By improving the shear resistance of the node structure, the ability of the connection node to bear and transmit horizontal loads is improved, thereby effectively transferring the load of the upper heavy steel structure to the built-in steel section of the lower reinforced concrete column, and then to the foundation. The force transmission path is direct and the structure is safe and reliable.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A node structure connected between a concrete structure and a steel structure, characterized in that: the node structure is arranged in the column of the lower concrete structure, and a finished steel support connected to the upper steel structure is provided at the top of the node structure;

[0006] The node structure includes steel sections, head plates, and longitudinal reinforcement connecting plates; the column is divided into a lower section and an upper section, the lower section is cast in advance, and a column foot for installing the steel sections is provided at the top of the lower section; the steel sections and the upper section of the column are the same length, the bottom end of the steel sections is installed on the column foot, and the head plate is horizontally fixed to the top end of the steel sections; the longitudinal reinforcements of the upper section of the column are arranged circumferentially at intervals around the steel sections, and the longitudinal reinforcement connecting plates are combined to form a cylindrical structure, the longitudinal reinforcement connecting plates are sleeved on the outside of the steel sections and the top end is fixed on the head plate, the shape of the longitudinal reinforcement connecting plates is determined according to the arrangement position of the longitudinal reinforcements, and the top end of the longitudinal reinforcements is fixed on the longitudinal reinforcement connecting plates; the node structure is cast in the upper section of the column, and the head plate is located at the top end of the upper end of the column; the finished steel support is fixed on the head plate.

[0007] According to the above technical solution, there are one or more welding connection points on the inner wall side of the longitudinal reinforcement connection plate and the side of the steel section.

[0008] According to the above technical solution, the thickness between the surface of the steel section and the outer wall of the upper section of the column shall not be less than 150mm; the total length of the steel section shall not be less than the floor height of the top floor.

[0009] According to the above technical solution, the width of the longitudinal reinforcement connecting plate shall not be less than 5 times the diameter of the longitudinal reinforcement, and the thickness of the longitudinal reinforcement connecting plate shall not be less than 0.7 times the diameter of the longitudinal reinforcement; the plane size of the head plate shall match the cross-sectional size of the column; the double-sided welding length of the longitudinal reinforcement on the longitudinal reinforcement connecting plate shall not be less than 5 times the diameter of the longitudinal reinforcement.

[0010] According to the above technical solution, the longitudinal reinforcement is double-sided welded on the longitudinal reinforcement connecting plate; circumferential welding is used between the finished steel support and the head plate; full penetration welding is used between the longitudinal reinforcement connecting plate and the head plate, between the longitudinal reinforcement connecting plate and the steel section, and between the head plate and the steel section.

[0011] According to the above technical solution, the steel section adopts an open or closed cross-section steel section; a plurality of studs are evenly spaced on the surface of the steel section.

[0012] According to the above technical solution, the longitudinal reinforcement connecting plate adopts a cylindrical structure; or the longitudinal reinforcement connecting plate adopts a square cylindrical structure.

[0013] According to the above technical solution, the side of the column is connected to the beam or wall, and multiple horizontal rib connecting plates and stiffening plates are provided on the steel section. The horizontal rib connecting plates and stiffening plates are located on the same horizontal plane, and the horizontal rib connecting plates are located on the outer side of the steel section close to the beam or wall, and the stiffening plates are located on the inner side of the steel section.

[0014] According to the above technical solution, casting holes are provided on both the stiffening plate and the head plate; wherein the grouting holes on the head plate are closed with steel plates of the same diameter, material and thickness as the grouting holes.

[0015] A building, characterized in that: a node structure as described above is adopted between a concrete structure and a steel structure; the upper steel structure adopts a spatial steel truss structure, a steel grid, or a steel lattice shell structure; and the lower concrete structure adopts a reinforced concrete shear wall structure or a reinforced concrete frame column structure.

[0016] The utility model has the following beneficial effects:

[0017] 1. By setting up a node structure composed of steel sections, head plates, and longitudinal reinforcement connection plates in the lower concrete structure, the upper steel structure transfers horizontal and vertical forces to the steel sections through the finished supports and head plates, and then the steel sections transfer them to the upper section of the column. Since the steel sections are cast together with the upper section of the column, the horizontal force is first transferred from the upper steel structure to the finished steel supports, head plates, and steel sections, and then from the steel sections to the column. Under the premise that the force and deformation of the finished steel supports meet the design requirements, the load of the upper steel frame structure can be effectively transferred to the built-in steel sections of the lower reinforced concrete structure, and then to the foundation. The force transmission path is direct and the structure is safe and reliable. The shear resistance of the connection node is improved, and the ability of the node structure to transmit large horizontal loads is improved. In addition, this node structure is simple in construction, easy to construct, and has reliable force transmission.

[0018] 2. The side welding of the longitudinal reinforcement connecting plate and the steel section improves the integrity of the node structure, thereby increasing the bearing capacity of the horizontal load of the node structure.

[0019] 3. Multiple studs are evenly spaced on the surface of the steel section to improve the connection strength between the steel section and the poured concrete.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (steel sections are omitted for ease of viewing);

[0023] Figure 2 This is a front view of the embodiment provided by the present invention before pouring;

[0024] Figure 3 This is a top cross-sectional view of an embodiment of the present invention before casting, excluding the head plate;

[0025] Figure 4 This is a schematic diagram of the steel section at the upper section of the column provided in an embodiment of the present utility model;

[0026] In the figure, 1. Steel section; 2. Head plate; 3. Longitudinal reinforcement connecting plate; 4. Upper section of column; 5. Longitudinal reinforcement; 6. Studs; 7. Wall; 8. Horizontal reinforcement connecting plate; 9. Stiffening plate; 10. Casting hole; 11. Horizontal reinforcement. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 The principles and features of the present invention are described, and the examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0028] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Reference Figures 1 to 4 As shown, the utility model provides a node structure connected between a concrete structure and a steel structure.

[0031] Example 1

[0032] The node structure is set in the column of the lower concrete structure, and a finished steel support connected to the upper steel structure is set on the top of the node structure;

[0033] The node structure includes a steel section 1, a head plate 2, and a longitudinal reinforcement connecting plate 3; the column is divided into a lower section of the column (the lower section of the column is not drawn in the figure) and an upper section of the column 4. The lower section is cast in advance, and a column foot for installing the steel section is provided at the top of the lower section (the column foot is not drawn in the figure); the steel section and the upper section of the column are the same length, the bottom end of the steel section is installed on the column foot, and the head plate is horizontally fixed to the top end of the steel section; the longitudinal reinforcement 5 of the upper section of the column is arranged at circumferential intervals on the circumferential side of the steel section, and the longitudinal reinforcement connecting plates are combined to form a cylindrical structure. The longitudinal reinforcement connecting plates are sleeved on the outside of the steel section and the top end is fixed on the head plate. The shape of the longitudinal reinforcement connecting plates is determined according to the arrangement position of the longitudinal reinforcement, and the top end of the longitudinal reinforcement is fixed on the longitudinal reinforcement connecting plates; the node structure is cast in the upper section of the column, and the head plate is located at the top end of the upper end of the column; the finished steel support is fixed on the head plate.

[0034] Under the combined action of load control, the horizontal force transmitted from the upper steel frame structure to the lower concrete structure is relatively large. For example, in a certain engineering project, the maximum horizontal load transmitted from the upper steel structure to the lower concrete structure is more than 10,000 kN. The use of conventional embedded parts for connection is not only difficult in design but also unreliable in force transmission.

[0035] In this embodiment, by setting a node structure composed of steel sections, head plates, and longitudinal reinforcement connecting plates in the lower concrete structure, the upper steel structure transfers horizontal and vertical forces to the steel sections through the finished supports and head plates, and then transfers them to the upper section of the column by the steel sections. Since the steel sections are cast together with the upper section of the column, the horizontal force is first transferred from the upper steel structure to the finished steel supports, head plates, and steel sections, and then transferred from the steel sections to the column. Under the premise that the force and deformation of the finished steel supports meet the design requirements, the load of the upper steel frame structure can be effectively transferred to the built-in steel sections of the lower reinforced concrete structure, and then to the foundation. The force transmission path is direct and the structure is safe and reliable. The shear resistance of the connection node is improved, and the ability of the node structure to transmit large horizontal loads is improved. In addition, this node structure is simple in structure, easy to construct, and has reliable force transmission.

[0036] Example 2

[0037] The structure and principle of Example 2 are similar to those of Example 1, differing in that, to better transfer the horizontal load of the upper steel structure to the lower concrete structure, one or more welded connection points are located between the inner wall of the longitudinal reinforcement connection plate and the side of the steel section. As shown in the figure, the steel section is laid on both sides of the longitudinal reinforcement connection plate and welded to the steel section.

[0038] In Example 1-2, the thickness between the surface of the steel section and the outer wall of the upper section of the column is not less than 150 mm; the total length of the steel section is not less than the height of the top floor.

[0039] In Example 1-2, the width of the longitudinal reinforcement connecting plate is not less than 5 times the diameter of the longitudinal reinforcement, and the thickness of the longitudinal reinforcement connecting plate is not less than 0.7 times the diameter of the longitudinal reinforcement; the plane size of the head plate matches the cross-sectional size of the column; the double-sided welding length of the longitudinal reinforcement on the longitudinal reinforcement connecting plate is not less than 5 times the diameter of the longitudinal reinforcement; not only is the structure simple and the construction convenient, but the longitudinal reinforcement is effectively anchored at the same time.

[0040] Preferably, the longitudinal reinforcement is double-sided welded on the longitudinal reinforcement connecting plate; the finished steel support and the head plate are welded by circumferential welding, which is simple to connect, convenient to construct, and easy to control the construction quality; full penetration welding is used between the longitudinal reinforcement connecting plate and the head plate, between the longitudinal reinforcement connecting plate and the steel section, and between the head plate and the steel section.

[0041] In Examples 1-2, the preferred steel sections are open or closed cross-section steel sections, such as I-beams, H-beams, and square steel. To enhance the connection strength between the steel sections and the poured concrete, multiple studs 6 are evenly spaced on the surface of the steel sections. In the figures, studs are omitted from portions of the steel sections to facilitate identification of the longitudinal reinforcement within the column. This does not necessarily mean that studs are absent in these areas.

[0042] In embodiment 1-2, the longitudinal reinforcement connecting plate adopts a cylindrical structure; or the longitudinal reinforcement connecting plate adopts a square cylindrical structure, which is assembled from four plate structures or formed in one piece. Figure 3 As shown, the square cylindrical structure includes four flat plates, two of which are welded to the steel sections, and the other two are welded to the square steels.

[0043] Example 3

[0044] The structure and principle of Example 3 are similar to those of Examples 1-2, with the difference being that: the side of the column is connected to a beam or a wall, and for the area not blocked by the steel section, the horizontal reinforcement 11 of the beam or the wall is tied to the longitudinal reinforcement, but some horizontal reinforcements are blocked by the steel section and cannot be tied to the longitudinal reinforcement; in order to facilitate connection with some horizontal reinforcements of the beam or the wall 7 on the side of the column, a plurality of horizontal reinforcement connecting plates 8 and stiffening plates 9 are provided on the steel section, and the horizontal reinforcement connecting plates and the stiffening plates are located on the same horizontal plane, and the horizontal reinforcement connecting plates are located on the outer side of the steel section close to the beam or the wall, and the stiffening plates are located on the inner side of the steel section.

[0045] In order to facilitate the pouring of concrete, pouring holes 10 are provided on both the stiffening plate and the head plate. The grouting holes on the head plate are sealed with steel plates of the same diameter, material and thickness as the grouting holes.

[0046] The utility model also provides a building, which adopts any node structure connected between the concrete structure and the steel structure; the upper steel structure adopts a spatial steel truss structure, a steel grid, or a steel grid shell structure; the lower concrete structure adopts a reinforced concrete shear wall structure or a reinforced concrete frame column structure.

[0047] In the building, since steel concealed columns are arranged within a certain height range at the top of the reinforced concrete shear wall structure or the frame column structure, the lower concrete structure of the reinforced concrete shear wall structure or the frame column structure has a large overall rigidity and small deformation, and can serve as a stable base for the upper steel structure, with little impact on the internal force of the upper steel structure, thereby facilitating full utilization of the high strength advantage of the steel structure.

[0048] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A node structure connecting a concrete structure and a steel structure, characterized by: The node structure is set in the column of the lower concrete structure, and a finished steel support connected to the upper steel structure is set on the top of the node structure; The node structure includes steel sections, head plates, and longitudinal reinforcement connecting plates; the column is divided into a lower section and an upper section, the lower section is cast in advance, and a column foot for installing the steel sections is provided at the top of the lower section; the steel sections and the upper section of the column are the same length, the bottom end of the steel sections is installed on the column foot, and the head plate is horizontally fixed to the top end of the steel sections; the longitudinal reinforcements of the upper section of the column are arranged circumferentially at intervals around the steel sections, and the longitudinal reinforcement connecting plates are combined to form a cylindrical structure, the longitudinal reinforcement connecting plates are sleeved on the outside of the steel sections and the top end is fixed on the head plate, the shape of the longitudinal reinforcement connecting plates is determined according to the arrangement position of the longitudinal reinforcements, and the top end of the longitudinal reinforcements is fixed on the longitudinal reinforcement connecting plates; the node structure is cast in the upper section of the column, and the head plate is located at the top end of the upper end of the column; the finished steel support is fixed on the head plate.

2. The node structure for connecting a concrete structure and a steel structure according to claim 1, characterized in that: There are one or more welding connection points between the inner wall side of the longitudinal reinforcement connection plate and the side of the steel section.

3. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: The thickness between the surface of the steel section and the outer wall of the upper section of the column shall not be less than 150mm; the total length of the steel section shall not be less than the floor height of the top floor.

4. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: The width of the longitudinal reinforcement connecting plate shall not be less than 5 times the diameter of the longitudinal reinforcement, and the thickness of the longitudinal reinforcement connecting plate shall not be less than 0.7 times the diameter of the longitudinal reinforcement; the plane size of the head plate shall match the cross-sectional size of the column; the double-sided welding length of the longitudinal reinforcement on the longitudinal reinforcement connecting plate shall not be less than 5 times the diameter of the longitudinal reinforcement.

5. The node structure for connecting a concrete structure and a steel structure according to claim 4, characterized in that: Double-sided welding is adopted for the longitudinal reinforcement on the longitudinal reinforcement connecting plate; circumferential welding is adopted between the finished steel support and the head plate; full penetration welding is adopted between the longitudinal reinforcement connecting plate and the head plate, between the longitudinal reinforcement connecting plate and the steel section, and between the head plate and the steel section.

6. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: The steel section adopts an open or closed cross-section steel section; a plurality of studs are evenly spaced on the surface of the steel section.

7. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: The longitudinal reinforcement connecting plate adopts a cylindrical structure; or the longitudinal reinforcement connecting plate adopts a square cylindrical structure.

8. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: The side of the column is connected to a beam or a wall, and multiple horizontal rib connecting plates and stiffening plates are provided on the steel section. The horizontal rib connecting plates and stiffening plates are located on the same horizontal plane, and the horizontal rib connecting plates are located on the outer side of the steel section close to the beam or the wall, and the stiffening plates are located on the inner side of the steel section.

9. The node structure for connecting a concrete structure and a steel structure according to claim 1 or 2, characterized in that: Casting holes are provided on both the stiffening plate and the head plate; the grouting holes on the head plate are sealed with steel plates of the same diameter, material and thickness as those of the grouting holes.

10. A building characterized by: A node structure connected between the concrete structure and the steel structure as described in any one of claims 1 to 7 is adopted; the upper steel structure adopts a spatial steel truss structure, a steel grid, or a steel lattice shell structure; the lower concrete structure adopts a reinforced concrete shear wall structure or a reinforced concrete frame column structure.

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