Steel fiber composite reinforced concrete terrace

Abstract

The utility model discloses a steel fiber composite reinforced concrete terrace which comprises a plurality of ground piles which are vertically arranged, a first cushion layer is arranged above the ground piles, two-way steel bars are arranged on the upper surface of the first cushion layer, and a terrace layer with steel fibers is arranged on the two-way steel bars. According to the utility model, the steel fibers are doped in the soil body and the terrace layer, so that the crack resistance of the terrace is obviously improved, the generation of cracks is reduced, and due to the increase of the local concrete thickness, the reinforcement requirement at the maximum hogging moment is reduced, and the unnecessary use of steel bars is reduced, thereby saving materials and improving the economical efficiency of the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of flooring, in particular to a steel fiber composite reinforced concrete flooring. Background Art

[0002] Reinforced concrete floor is a building structure, usually composed of steel bars. Reinforced concrete floor itself is a brittle material with poor tensile properties. When subjected to tension, concrete is prone to cracks. Therefore, it is necessary to propose a steel fiber composite reinforced concrete floor to improve the crack resistance of reinforced concrete floor.

[0003] Furthermore, in traditional reinforced concrete structures, the upper surface through-long steel bars (also called top surface continuous steel bars or top surface main bars) usually refer to a series of continuous steel bars arranged on the upper surface of a concrete slab or beam. The use of through-long steel bars will increase material costs. Therefore, how to improve the economy of reinforced concrete floors is also a problem that needs to be solved urgently. Utility Model Content

[0004] In order to solve the above problem, the utility model provides a steel fiber composite reinforced concrete floor to solve the problem.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A steel fiber composite reinforced concrete floor comprises a plurality of vertically arranged ground piles, a first cushion layer is arranged above the ground piles, bidirectional steel bars are arranged on the upper surface of the first cushion layer, and a floor layer with steel fibers is arranged on the upper layer of the bidirectional steel bars.

[0007] It is further configured as follows: a second cushion layer is arranged at the top of each of the plurality of ground piles, and the second cushion layer is arranged in a concave shape, a concrete pile cap with steel fiber is arranged in the second cushion layer, and the first cushion layer is arranged on both sides of the second cushion layer.

[0008] It is further configured as follows: inner walls on both sides of the second cushion layer are inclined outward from bottom to top.

[0009] It is further configured as follows: the second cushion layer is integrally formed with the first cushion layer.

[0010] It is further configured that: the section thickness of the first cushion layer is consistent with that of the second cushion layer.

[0011] It is further configured as follows: the first cushion layer is a plain concrete first cushion layer, and the second cushion layer is a plain concrete second cushion layer.

[0012] It is further configured as follows: a plurality of top plate steel bars are arranged on the upper side of the bidirectional steel bars, and the plurality of top plate steel bars are respectively opposite to a plurality of the second cushion layers.

[0013] It is further configured as follows: the plurality of top plate steel bars are configured as n-shaped, and the thickness of the floor layer is consistent with the height of the top plate steel bars.

[0014] It is further configured as follows: the surface of the top of the top plate reinforcement is provided with additional reinforcements distributed front and back.

[0015] It is further configured that: the length of the top plate reinforcement is the center distance between two adjacent piles.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] 1. Improve crack resistance: By adding steel fibers into the concrete pile cap and floor layer, the crack resistance of the floor is significantly improved and the occurrence of cracks is reduced.

[0018] 2. Enhanced local bearing capacity: The design of the concave-shaped second cushion layer and the N-shaped top plate reinforcement enhances the bearing capacity of the structure in key areas, especially at the maximum negative bending moment at the top of the pile.

[0019] 3. Improve economy: Due to the increase in local concrete thickness, the reinforcement demand at the maximum negative bending moment is reduced, and the use of unnecessary steel bars is reduced, thereby saving materials and improving the economy of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure numerals: 1. ground piles; 2. second cushion layer; 3. first cushion layer; 4. concrete pile cap; 5. bidirectional steel bars; 6. top plate steel bars; 7. floor layer; 8. additional steel bars. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example

[0027] Reference Figure 1 , is a steel fiber composite reinforced concrete floor disclosed by the utility model, comprising a plurality of vertically arranged ground piles 1. In the present embodiment, two ground piles 1 are provided. The ground piles 1 can be prefabricated piles or cast-in-place piles or other pile types that can meet the vertical bearing capacity. A second cushion layer 2 is provided at the top of each of the two ground piles 1, and the second cushion layer 2 is provided in a concave shape. The inner walls on both sides of the second cushion layer 2 are inclined outward from bottom to top. A first cushion layer 3 is provided on both sides of the two second cushion layers 2. The second cushion layer 2 and the first cushion layer 3 can be integrally formed. In the present embodiment, the cross-sectional thickness of the first cushion layer 3 and the second cushion layer 2 is consistent and both are plain concrete layers;

[0028] Furthermore, a concrete pile cap 4 mixed with steel fibers is arranged in the groove of the second cushion layer 2 to increase the concrete thickness of the top of the local ground pile 1 and improve the local shear resistance. Steel fibers are mixed to improve the crack resistance of the floor. Specifically, due to its high tensile strength, steel fibers can effectively withstand the tensile stress generated inside the concrete, thereby improving the overall tensile resistance of the structure. When cracks occur, the steel fibers can play a bridging role, connecting the concrete on both sides of the cracks to inhibit further expansion of the cracks.

[0029] In this embodiment, the concave-shaped second cushion layer 2 partially thickens the concrete thickness, thereby increasing the calculated section height at the maximum negative bending moment at the top of the pile 1 and reducing the maximum negative bending moment reinforcement amount.

[0030] Furthermore, a bidirectional steel bar 5 for bearing the positive bending moment of the plate strip is arranged on the top surface of the first cushion layer 3. The arrangement of the bidirectional steel bar 5 can evenly bear the loads from the X and Y directions, avoiding uneven force caused by unidirectional reinforcement.

[0031] In this embodiment, two top plate steel bars 6 are arranged on the upper side of the bidirectional steel bars 5, and the top plate steel bars 6 are arranged to be n-shaped. Furthermore, the top plate steel bars 6 correspond one-to-one to the ground piles 1 and are respectively located directly above the ground piles 1. The arrangement of the n-shaped top plate steel bars 6 is used to enhance the local bending resistance of the floor slab in the second cushion layer 2 area and to withstand tensile force.

[0032] In this embodiment, a floor layer 7 is provided on the upper surface of the bidirectional steel bar 5, the thickness of the floor layer 7 is consistent with the height of the top plate steel bar 6, and further, steel fibers are mixed in the floor layer 7;

[0033] In this embodiment, the shear bearing capacity of the concrete pile cap 4 and the floor layer 7 satisfies:

[0034] F1≤(0.7β h f t +0.25σ pc,m )ηu m h0(Formula 1);

[0035] Among them, the coefficient η of formula 1 should be calculated according to the following formula, and the minimum value is taken:

[0036]

[0037]

[0038] Wherein, F1 represents the local load design value or the concentrated reaction force design value;

[0039] β h Indicates the cross-section height influence coefficient: when h is not greater than 800 mm, β h Take it as 1.0; when h is not less than 2000mm, β h Take it as 0.9, and use linear interpolation method in between; σ pc,m It represents the weighted average value of the effective precompression stress of concrete in two directions on the perimeter of the section according to the length; u m represents the perimeter of the section; h0 is the effective height of the section; η1 represents the influence coefficient of the shape of the area of ​​action of local load or concentrated reaction force; η2 represents the influence coefficient of the ratio of the perimeter of the section to the effective height of the plate section; β s It indicates the ratio of the long side to the short side when the area of ​​action of local load or concentrated reaction force is a rectangle; α s Represents the column position influence coefficient.

[0040] Additional reinforcement bars 8 are provided on the lower surface of the top of the top plate reinforcement bars 6 and are distributed front and back;

[0041] Furthermore, the length of the top plate reinforcement 6 is equal to the center distance between two adjacent piles 1.

[0042] The working principle and beneficial effects of the utility model are:

[0043] The utility model uses two prefabricated or cast-in-place piles 1 to ensure that the vertical bearing capacity requirements of the structure are met, and the shear bearing capacity of the concrete pile cap 4 and the floor layer 7 is calculated by formulas 1, 2 and 3 to ensure the safety of the structure. A concave-shaped second cushion layer 2 is arranged on the top of the pile 1 and is combined with a first cushion layer 3 integrally formed therewith to form a solid connection unit. A concrete pile cap 4 mixed with steel fibers is arranged in the groove of the second cushion layer 2, and bidirectional steel bars 5 are cast on the top surface of the first cushion layer 3 to evenly bear the loads in the X and Y directions to avoid uneven force. N-shaped top plate steel bars 6 with additional steel bars 8 are cast to enhance the local bending resistance of the second cushion layer 2 area, and finally a floor layer 7 mixed with steel fibers is arranged.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A steel fiber composite reinforced concrete floor, characterized in that: The invention comprises a plurality of vertically arranged ground piles (1), a first cushion layer (3) being arranged above the ground piles (1), bidirectional steel bars (5) being arranged on the upper surface of the first cushion layer (3), and a floor layer (7) with steel fibers being arranged on the upper layer of the bidirectional steel bars (5).

2. The steel fiber composite reinforced concrete floor according to claim 1, characterized in that: A second cushion layer (2) is arranged at the top of each of the plurality of ground piles (1), and the second cushion layer (2) is arranged in a concave shape, a concrete pile cap (4) with steel fibers is arranged in the second cushion layer (2), and the first cushion layer (3) is arranged on both sides of the second cushion layer (2).

3. The steel fiber composite reinforced concrete floor according to claim 2, characterized in that: The inner walls on both sides of the second cushion layer (2) are inclined outward from bottom to top.

4. The steel fiber composite reinforced concrete floor according to claim 2, characterized in that: The second cushion layer (2) and the first cushion layer (3) are integrally formed.

5. The steel fiber composite reinforced concrete floor according to claim 2, characterized in that: The first cushion layer (3) and the second cushion layer (2) have the same cross-sectional thickness.

6. The steel fiber composite reinforced concrete floor according to claim 2, characterized in that: The first cushion layer (3) is a plain concrete first cushion layer (3), and the second cushion layer (2) is a plain concrete second cushion layer (2).

7. The steel fiber composite reinforced concrete floor according to claim 2, characterized in that: A plurality of top plate steel bars (6) are arranged on the upper side of the bidirectional steel bars (5), and the plurality of top plate steel bars (6) are respectively opposite to the plurality of second cushion layers (2).

8. The steel fiber composite reinforced concrete floor according to claim 7, characterized in that: The plurality of top plate steel bars (6) are all arranged in an n-shape, and the thickness of the floor layer (7) is consistent with the height of the top plate steel bars (6).

9. The steel fiber composite reinforced concrete floor according to claim 7, characterized in that: The surface of the top of the top plate steel bar (6) is provided with additional steel bars (8) distributed front and back.

10. The steel fiber composite reinforced concrete floor according to claim 7, characterized in that: The length of the top plate steel bar (6) is equal to the center distance between two adjacent piles (1).

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