Staggered slab beam column joint reinforcing structure

Abstract

The utility model discloses a slab staggering beam column joint reinforcing structure, which relates to the technical field of constructional engineering transformation and comprises a column body, a first slab staggering beam and a second slab staggering beam, the height position of the first slab staggering beam is lower than that of the second slab staggering beam, and a first thickening layer and a second thickening layer are fixedly arranged on the lower end face of the first slab staggering beam and the lower end face of the second slab staggering beam respectively. Stirrup frames are installed on the outer sides of the column body, the first slab staggering beam, the second slab staggering beam, the first thickening layer and the second thickening layer, a filling layer is arranged on the inner side of each stirrup frame, and the bottom face, on the outer side of the first slab staggering beam, of each stirrup frame is lower than the bottom face, on the outer side of the second slab staggering beam, of each stirrup frame; the stress state of the staggered beams is changed by increasing the section thickness of the staggered beams and reinforcing the stirrups, so that the staggered beams of the underground garage are changed from staggered layers to continuous, the stress state of column tops is changed from eccentric stress to axial stress, and the unbalanced bending moment of short columns caused by staggered layers is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering reconstruction, and more specifically to a staggered beam-column node reinforcement structure. Background Art

[0002] When an extra-long underground space is built on a slope, it is often treated with a staggered structure, and the height difference of the basement roof is large. In order to make the force of the slope building structure more reasonable, an anti-seismic joint is set between the tower and the basement, which has achieved good results. However, the extra-long staggered beam structure located in a place with large temperature differences is often prone to temperature stress differences at the staggered position under the action of temperature, causing cracks or even fractures at the staggered position. Therefore, it is necessary to study a reinforcement structure for temperature cracks at the staggered position of the extra-long staggered beam structure. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and provide a staggered beam-column node reinforcement structure, which can eliminate the unbalanced bending moment of short columns caused by structural misalignment and improve the stability of the staggered beam-column node.

[0004] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a staggered beam-column node reinforcement structure, including a column, a first staggered beam and a second staggered beam, the height position of the first staggered beam is lower than that of the second staggered beam, the lower end surfaces of the first staggered beam and the second staggered beam are respectively fixed with a first thickening layer and a second thickening layer, the outer sides of the column, the first staggered beam, the second staggered beam, the first thickening layer and the second thickening layer are installed with a stirrup frame, the inner side of the stirrup frame is provided with a filling layer, and the bottom surface of the stirrup frame on the outer side of the first staggered beam is lower than the bottom surface of the stirrup frame on the outer side of the second staggered beam.

[0005] Preferably, the stirrup frame includes a plurality of first longitudinal bars, a plurality of second longitudinal bars, a plurality of third longitudinal bars, a plurality of stirrup negative bars and a plurality of anchoring layers.

[0006] Preferably, the plurality of first longitudinal bars are connected through the first staggered beam and the first thickened layer, the plurality of second longitudinal bars are connected through the second staggered beam and the second thickened layer, and the lower ends of the plurality of third longitudinal bars are plugged into the top of the column.

[0007] Preferably, a plurality of negative stirrups are fixedly connected between the plurality of first longitudinal bars, the plurality of second longitudinal bars, and the plurality of third longitudinal bars, and the negative stirrups located at the lower side of the second longitudinal bars are plugged into the column.

[0008] Preferably, the plurality of anchoring layers are respectively located between the plurality of longitudinal reinforcements and the through holes of the column, the first staggered beam and the second staggered beam.

[0009] Preferably, the anchoring layer is specifically an adhesive perfusion layer.

[0010] Preferably, the filling layer is a fine stone concrete layer.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. By increasing the cross-sectional thickness of the beams at the staggered level and reinforcing them with stirrups, the stress state of the staggered beams is changed, so that the beams at the staggered level of the underground garage are changed from "staggered" to continuous, and the stress state of the column top is changed from eccentric compression to axial compression, eliminating the unbalanced bending moment of the "short column" caused by staggered levels;

[0013] 2. It eliminates the unbalanced bending moment of short columns caused by misalignment, rather than directly increasing the bending capacity of the structure by increasing the cross-section method. Through static load tests on the new reinforced nodes, the test results show that the shear key steel bars planted before pouring new concrete in the upper tension area of ​​the reinforced node ensure the shear force transmission between the horizontal fiber layer sections. After reinforcement, the combined section of the new and old concrete still meets the flat section assumption, achieving the effectiveness of the consistent work of the new and old concrete, and can basically achieve the moment balance of the high and low spans in the node domain. The new composite node can increase the cracking load, stiffness, yield load and ultimate load of the node. The reinforced structure conforms to the construction concept of "strong node and weak component". BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of point A;

[0016] Figure 3 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0017] Figure 4 yes Figure 3 Schematic diagram of point B.

[0018] Figure numerals: 1. column; 2. first staggered beam; 3. second staggered beam; 4. first thickening layer; 5. second thickening layer; 6. stirrup frame; 601. first longitudinal reinforcement; 602. second longitudinal reinforcement; 603. third longitudinal reinforcement; 604. stirrup negative reinforcement; 605. anchoring layer; 7. filling layer. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] Example 1

[0022] See also Figure 1-2 , the utility model provides the following technical solutions:

[0023] Where the height difference between beam-column nodes and secondary beam (cross beam) nodes is not less than 300mm, a staggered beam-column node reinforcement structure is added, including a column 1, a first staggered beam 2 and a second staggered beam 3. The height position of the first staggered beam 2 is lower than that of the second staggered beam 3. The lower end surfaces of the first staggered beam 2 and the second staggered beam 3 are respectively fixed with a first thickening layer 4 and a second thickening layer 5. A stirrup frame 6 is installed on the outer side of the column 1, the first staggered beam 2, the second staggered beam 3, the first thickening layer 4 and the second thickening layer 5. A filling layer 7 is arranged on the inner side of the stirrup frame 6. The bottom surface of the stirrup frame 6 on the outer side of the first staggered beam 2 is lower than the bottom surface of the stirrup frame 6 on the outer side of the second staggered beam 3.

[0024] The stirrup frame 6 includes a plurality of first longitudinal reinforcements 601, a plurality of second longitudinal reinforcements 602, a plurality of third longitudinal reinforcements 603, a plurality of negative stirrup reinforcements 604 and a plurality of anchoring layers 605; a plurality of first longitudinal reinforcements 601 are connected through the first staggered beam 2 and the first thickening layer 4, a plurality of second longitudinal reinforcements 602 are connected through the second staggered beam 3 and the second thickening layer 5, and the lower ends of a plurality of third longitudinal reinforcements 603 are plugged into the top of the column 1; a plurality of negative stirrup reinforcements 604 are fixedly connected between a plurality of first longitudinal reinforcements 601, a plurality of second longitudinal reinforcements 602 and a plurality of third longitudinal reinforcements 603, and the negative stirrup reinforcements 604 located at the lower side of the second longitudinal reinforcements 602 are plugged into the column 1; a plurality of anchoring layers 605 are respectively located between the through holes of the plurality of longitudinal reinforcements and the column 1, the first staggered beam 2 and the second staggered beam 3.

[0025] The anchoring layer 605 is specifically an adhesive injection layer, and the anchoring layer 605 is used to fix a plurality of longitudinal reinforcements; the filling layer 7 is specifically a fine stone concrete layer.

[0026] In this embodiment: when the bottom height of the second thickened layer 5 is lower than the height of the first staggered beam 2, the stirrup negative reinforcement 604 connected to the upper ends of several first longitudinal reinforcements 601, several second longitudinal reinforcements 602, and several third longitudinal reinforcements 603 are all on the same horizontal line, and the top surface of the filling layer 7 is planar as a whole, that is, the mass of the filling layer 7 outside the first longitudinal reinforcement 601 is greater than the mass of the filling layer 7 outside the second longitudinal reinforcement 602, thereby changing the beams at the staggered locations of the underground garage from "staggered" to continuous, and changing the stress state of the column top from eccentric compression to axial compression, thereby eliminating the unbalanced bending moment of the "short column" caused by the staggered locations.

[0027] Example 2

[0028] See also Figure 3-4 , the utility model provides the following technical solutions:.

[0029] On the basis of Example 1, when the bottom height of the second thickening layer 5 is higher than the height of the first staggered beam 2, the stirrup negative reinforcement 604 connected to the upper ends of several first longitudinal reinforcements 601 is inclined, and the top surface of the filling layer 7 outside the first longitudinal reinforcement 601 is inclined, thereby adjusting the mass of the filling layer 7 on the upper side of the first thickening layer 3, so that the beam at the staggered location of the underground garage is changed from "staggered" to continuous, and the stress state of the column top is changed from eccentric compression to axial compression, thereby eliminating the unbalanced bending moment of the "short column" caused by the staggered level.

[0030] The working principle and use process of this utility model:

[0031] (1) Increase the cross-section of the two offset beams;

[0032] (2) holes are opened on the two staggered beams, the surface of the increased cross section and the top surface of the column, multiple longitudinal reinforcements are respectively passed through the multiple holes, and negative reinforcements are used to fix the multiple longitudinal reinforcements to form a stirrup frame, and adhesive is poured into the holes;

[0033] (3) Pour fine stone cement inside the stirrups to complete the construction of the staggered beam-column node reinforcement structure.

[0034] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A staggered beam-column node reinforcement structure, comprising a column (1), a first staggered beam (2) and a second staggered beam (3), wherein the height of the first staggered beam (2) is lower than that of the second staggered beam (3), and characterized in that: The lower end surfaces of the first staggered beam (2) and the second staggered beam (3) are respectively fixedly provided with a first thickening layer (4) and a second thickening layer (5); the outer sides of the column (1), the first staggered beam (2), the second staggered beam (3), the first thickening layer (4), and the second thickening layer (5) are provided with a stirrup frame (6); the inner side of the stirrup frame (6) is provided with a filling layer (7); the bottom surface of the stirrup frame (6) on the outer side of the first staggered beam (2) is lower than the bottom surface of the stirrup frame (6) on the outer side of the second staggered beam (3).

2. The staggered beam-column node reinforcement structure according to claim 1, characterized in that: The stirrup frame (6) comprises a plurality of first longitudinal bars (601), a plurality of second longitudinal bars (602), a plurality of third longitudinal bars (603), a plurality of stirrup negative bars (604) and a plurality of anchoring layers (605).

3. The staggered beam-column joint reinforcement structure according to claim 2 is characterized in that: The plurality of first longitudinal bars (601) are connected through the first staggered beam (2) and the first thickened layer (4), the plurality of second longitudinal bars (602) are connected through the second staggered beam (3) and the second thickened layer (5), and the lower ends of the plurality of third longitudinal bars (603) are plugged into the top of the column (1).

4. The staggered beam-column joint reinforcement structure according to claim 2 is characterized in that: A plurality of stirrup negative reinforcements (604) are fixedly connected between the plurality of first longitudinal reinforcements (601), the plurality of second longitudinal reinforcements (602), and the plurality of third longitudinal reinforcements (603), and the stirrup negative reinforcements (604) located at the lower side of the second longitudinal reinforcements (602) are plugged into the column (1).

5. The staggered beam-column joint reinforcement structure according to claim 2 is characterized in that: The plurality of anchoring layers (605) are respectively located between the plurality of longitudinal reinforcements and the through holes of the column (1), the first staggered beam (2), and the second staggered beam (3).

6. The staggered beam-column joint reinforcement structure according to claim 5, characterized in that: The anchoring layer (605) is specifically an adhesive injection layer.

7. The staggered beam-column joint reinforcement structure according to claim 1, characterized in that: The filling layer (7) is specifically a fine stone concrete layer.

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