Split-level floor slab node haunching structure

Abstract

The utility model discloses a split-level floor slab node haunching structure, which relates to the technical field of constructional engineering reconstruction, and comprises a column body, a lower split-level floor slab and an upper split-level floor slab, a plurality of first reinforcing steel bars are fixedly anchored between the column body and the lower split-level floor slab, and a plurality of second reinforcing steel bars are anchored on the outer sides of the first reinforcing steel bars. Filling layers are built on the outer sides of the first reinforcing steel bars and the second reinforcing steel bars; a simply supported floor at the staggered floor is changed into a continuous floor through a haunching structure, the unbalanced bending moment caused by a short column is solved, the stress state of the column top is changed into axis stress from eccentric stress, the floor at the staggered floor is haunched, the current stress state of a beam and a plate is changed, and therefore the ultra-long staggered floor structure is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering transformation, and more specifically to a haunch structure for a split-level floor node. Background Technique

[0002] When an ultra-long underground space is built on a sloping site, a split-level structure is often used for treatment, and the height difference of the split level of the basement roof is relatively large; in order to make the force of the sloping building structure more reasonable, a seismic joint is set between the tower and the basement, and good results have been obtained. However, for an ultra-long split-level floor structure with a large temperature difference, temperature stress differences are likely to form at the split level under the action of temperature, causing cracks or even fractures in the structure at the split level. Therefore, it is necessary to study a reinforcement structure for temperature cracks at the split level of an ultra-long split-level floor structure. Content of the Utility Model

[0003] The purpose of the utility model is: to solve the above technical problems, the utility model provides a haunch structure for a split-level floor node, which can eliminate the unbalanced moment of short columns caused by the split level of the structure and improve the stability of the split-level floor column node.

[0004] The utility model specifically adopts the following technical solutions to achieve the above purpose: a haunch structure for a split-level floor node, including a column, a lower split-level floor, and an upper split-level floor. A plurality of first steel bars are fixedly anchored between the column and the lower split-level floor. A plurality of second steel bars are anchored outside the plurality of first steel bars, and a filling layer is built outside the plurality of first steel bars and the plurality of second steel bars.

[0005] In order to improve the firmness of the connection between the column and the filling layer, as an optimization of the haunch structure for a split-level floor node of the utility model, a reinforcement layer is provided on the outer wall of the column.

[0006] In order to improve the stability of the connection between the first steel bar and the column, as an optimization of the haunch structure for a split-level floor node of the utility model, the upper end of the first steel bar is bent and anchored into the interior of the column, and the lower end of the first steel bar is anchored into the interior of the lower split-level floor.

[0007] In order to increase the strength of the filling layer, as an optimization of the haunch structure for a split-level floor node of the utility model, the material of the filling layer specifically adopts expansive concrete.

[0008] In order to further improve the firmness of the connection between the column and the filling layer, as an optimization of the haunch structure for a split-level floor node of the utility model, an interface agent layer is provided between the outer wall of the filling layer and the column and the lower split-level floor.

[0009] In order to improve the firmness of the connection between the first steel bar and the column and the lower stepped floor slab, preferably, as a stepped floor slab node haunch structure of the present utility model, an anchoring layer is provided on the outer side of the part where the first steel bar is anchored into the column and the lower stepped floor slab, and the material of the anchoring layer is specifically an adhesive.

[0010] The beneficial effects of the present utility model are as follows: By anchoring steel bars in the column and the lower stepped floor slab and providing a filling layer on the outer side of the steel bars, the simply supported floor slab at the stepped part is changed into a continuous floor slab by the haunch structure, the unbalanced moment caused by the "short column" is solved, the stress state at the top of the column is changed from eccentric compression to axial compression, and the stepped floor slab is haunched, changing the current stress state of the beam and the slab, so as to achieve an extra-long stepped floor slab structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0012] Figure 2 is Figure 1 schematic diagram at Location A of

[0013] Figure 3 is a schematic structural diagram of Embodiment 2 of the present utility model;

[0014] Figure 4 is Figure 3 schematic diagram at Location B of

[0015] Reference numerals: 1, column; 101, reinforcement layer; 2, lower stepped floor slab; 3, upper stepped floor slab; 4, first steel bar; 5, second steel bar; 6, filling layer; 7, interface agent layer; 8, anchoring layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments. Here, the schematic embodiments of the present utility model and the description are used to explain the present utility model, but are not intended to limit the present utility model.

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 construed as a limitation to the present utility model.

[0018] Embodiment 1

[0019] Please refer to Figure 1-2 , the present utility model provides the following technical solutions:

[0020] For the staggered floor slab joints with a staggered height less than 1000 mm, a solid web haunch structure is adopted. The upper end of the first steel bar 4 is bent and anchored into the interior of the column 1, and the lower end of the first steel bar 4 is anchored into the interior of the lower staggered floor slab 2. An adhesive is poured into the holes where the first steel bars 4 are anchored to form an anchoring layer 8. A plurality of second steel bars 5 are anchored outside the plurality of first steel bars 4. Before filling the haunch, a part of the surfaces of the column 1 and the lower staggered floor slab 2 are coated with an interface agent to form an interface agent layer 7, thereby completing the treatment of the connection between the column 1, the lower staggered floor slab 2 and the filling layer 6. The included angle a between the first steel bar 4 and the lower staggered floor slab 2 is 60°. Expansive concrete is poured between the first steel bar 4 and the lower staggered floor slab 2 as the filling layer 6. At this time, the cross-section of the filling layer 6 is triangular. Finally, a reinforcement layer 101 is fixedly connected to the outer wall of the column 1 uniformly.

[0021] In this embodiment: The simply supported floor slab at the staggered position is changed into a continuous floor slab through the haunch structure, the unbalanced moment caused by the "short column" is solved, the stress state at the top of the column is changed from eccentric compression to axial compression, and the floor slab at the staggered position is treated with a haunch, changing the current stress state of the beam and the slab, so as to achieve an extra-long staggered floor slab structure.

[0022] Embodiment 2

[0023] Please refer to Figure 3-4 , the present utility model provides the following technical solutions: For the staggered floor slab joints with a staggered height greater than 1000 mm, a hollow web haunch structure is adopted. The upper end of the first steel bar 4 is bent and anchored into the interior of the column 1, and the lower end of the first steel bar 4 is anchored into the interior of the lower staggered floor slab 2, and a plurality of anchored first steel bars 4 form a "sandwich" shape. An adhesive is poured into the holes where the first steel bars 4 are anchored to form an anchoring layer 8. A plurality of second steel bars 5 are anchored outside the plurality of first steel bars 4. Before filling the haunch, a part of the surfaces of the column 1 and the lower staggered floor slab 2 are coated with an interface agent to form an interface agent layer 7, thereby completing the treatment of the connection between the column 1, the lower staggered floor slab 2 and the filling layer 6. The included angle b between the first steel bar 4 and the lower staggered floor slab 2 is 45°. Expansive concrete is poured into the "sandwich" formed by the first steel bars 4 as the filling layer 6. The filling layer 6 is in a plate-like structure, and the width of the filling layer 6 is 200 mm. Finally, a reinforcement layer 101 is fixedly connected to the outer wall of the column 1 uniformly.

[0024] In this embodiment: The simply supported floor slab at the staggered position is changed into a continuous floor slab through the haunch structure, the unbalanced moment caused by the "short column" is solved, the stress state at the top of the column is changed from eccentric compression to axial compression, and the floor slab at the staggered position is treated with a haunch, changing the current stress state of the beam and the slab, so as to achieve an extra-long staggered floor slab structure.

[0025] The above has introduced in detail the technical solutions provided by the embodiments of the present utility model. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present utility model. The description of the above embodiments is only applicable to helping understand the principles of the embodiments of the present utility model. At the same time, for those of ordinary skill in the art, according to the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A haunched structure for a split-level floor joint, comprising a column body (1), a lower split-level floor (2), and an upper split-level floor (3), characterized in that: A plurality of first steel bars (4) are fixedly anchored between the column body (1) and the lower staggered floor slab (2). A plurality of second steel bars (5) are anchored outside the plurality of first steel bars (4). A filling layer (6) is built outside the plurality of first steel bars (4) and the plurality of second steel bars (5); A reinforcement layer (101) is provided on the outer wall of the column body (1); The upper end of the first steel bar (4) is bent and anchored into the interior of the column body (1), and the lower end of the first steel bar (4) is anchored into the interior of the lower staggered floor slab (2); An interface agent layer (7) is provided between the outer wall of the filling layer (6) and the column body (1) and the lower staggered floor slab (2); Anchoring layers (8) are provided on the outside of the parts of the first steel bars (4) anchored into the column body (1) and the lower staggered floor slab (2); 2. The haunch structure of the split-level floor slab node according to claim 1, characterized in that: The material of the filling layer (6) is specifically expanded concrete; 3. The haunch structure of a split-level floor slab node according to claim 1, characterized in that: The material of the anchoring layer (8) is specifically an adhesive.

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