Plane steel bar truss prestressed concrete composite slab

Abstract

The utility model discloses a plane steel bar truss prestressed concrete composite board relates to building technical field, including plane steel bar truss and bottom plate, plane steel bar truss includes upper chord steel bar, lower chord steel bar and web steel bar, lower chord steel bar sets up the just below of upper chord steel bar, web steel bar is connected between upper chord steel bar and lower chord steel bar alternately, and the part of web steel bar bottom that projects is bent outwards and forms horizontal anchoring section, and horizontal anchoring section alternately is formed plane two sides of upper chord steel bar and lower chord steel bar towards, and bottom plate is provided with prestressed muscle in along its length direction in, and lower chord steel bar and horizontal anchoring section are embedded to bottom plate in, the utility model discloses a traditional triangle space steel bar truss is improved as plane steel bar truss, has simplified the processing procedure of steel bar truss and has saved the steel consumption, through adding prestressed muscle in the concrete bottom plate, has promoted the tensile property and the carrying capacity of bottom plate, and then has promoted the free support span capacity of concrete composite board.

Description

Technical Field

[0001] This utility model relates to the field of building technology, and more specifically to a planar steel truss prestressed concrete composite slab. Background Technology

[0002] Currently, traditional reinforced concrete composite slabs generally use triangular spatial steel trusses. Triangular spatial steel trusses require a large amount of steel, increasing costs. At the same time, the existing reinforced concrete composite slabs have low tensile strength and load-bearing capacity. The span for support-free construction is generally no more than 4.5m. For slab spans of more than 4.5m, supports are still required, which cannot meet the requirements for support-free construction of large spans.

[0003] Therefore, how to provide a concrete composite slab that can improve the steel consumption of triangular spatial steel trusses while enhancing tensile strength and load-bearing capacity is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a planar steel truss prestressed concrete composite slab, which improves the steel consumption of triangular spatial steel trusses, while also enhancing the tensile strength and load-bearing capacity of the base slab, thereby improving the span capacity of the concrete composite slab without support.

[0005] This utility model provides a planar steel truss prestressed concrete composite slab, comprising: a planar steel truss and a base slab; The planar steel truss includes top chord reinforcement, bottom chord reinforcement, and web reinforcement; The lower chord reinforcement is located directly below the upper chord reinforcement and is parallel to the upper chord reinforcement; The web reinforcement bars are alternately connected between the upper chord reinforcement bars and the lower chord reinforcement bars, and one end of the web reinforcement bar connected to the lower chord reinforcement bar extends beyond the bottom of the lower chord reinforcement bar. The portion of the web reinforcement bar extending beyond the bottom of the lower chord reinforcement bar is bent away from the plane formed by the upper chord reinforcement bar and the lower chord reinforcement bar to form a transverse anchorage section. The transverse anchorage section along the length of the lower chord reinforcement bar alternately faces both sides of the plane formed by the upper chord reinforcement bar and the lower chord reinforcement bar. The base plate has prestressed tendons arranged along its length, and the lower chord reinforcement and the transverse anchorage section are embedded in the base plate.

[0006] According to the planar steel truss prestressed concrete composite slab provided by this utility model, the web reinforcement is connected to one side of the plane formed by the upper chord reinforcement and the lower chord reinforcement.

[0007] According to the planar steel truss prestressed concrete composite slab provided by this utility model, the transverse anchoring section is an arc-shaped bend or a right-angle bend.

[0008] According to the planar steel truss prestressed concrete composite slab provided by this utility model, the diameter of the upper chord steel bar is larger than the diameter of the lower chord steel bar.

[0009] According to the planar steel truss prestressed concrete composite slab provided by this utility model, at least two planar steel trusses are provided on one of the base plates, each of the planar steel trusses is provided along the length direction of the base plate, and the two planar steel trusses are provided at intervals.

[0010] According to the planar steel truss prestressed concrete composite slab provided by this utility model, the plane where the transverse anchorage section is located is perpendicular to the plane formed by the upper chord steel bar and the lower chord steel bar.

[0011] According to the planar steel truss prestressed concrete composite slab provided by this utility model, transverse steel bars are also provided in the bottom slab, and the transverse steel bars are arranged perpendicularly to the prestressing tendons.

[0012] According to the planar steel truss prestressed concrete composite slab provided by this utility model, the transverse anchorage sections located on both sides of the lower chord steel bar extend out of the lower chord steel bar by equal lengths.

[0013] According to the planar steel truss prestressed concrete composite slab provided by this utility model, it further includes an upper transverse bar, which spans all the planar steel trusses and is connected to the upper chord bar in each of the planar steel trusses.

[0014] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a planar steel truss prestressed concrete composite slab. By improving the traditional triangular spatial steel truss into a planar steel truss, the processing procedure of the steel truss is simplified and the amount of steel used is saved. By adding prestressing tendons to the concrete base slab, the tensile performance and bearing capacity of the base slab are improved, thereby improving the span capacity of the concrete composite slab without support. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 A perspective view of the planar steel truss provided for this utility model; Figure 2 This is a front view of the planar steel truss provided by this utility model; Figure 3 Left view of the planar steel truss provided by this utility model; Figure 4 A top view of the planar steel truss prestressed concrete composite slab provided by this utility model; Figure 5 A front view of the planar steel truss prestressed concrete composite slab provided by this utility model; Figure 6 Provided by this utility model Figure 5 A magnified view of part C; Figure 7 Right view of the planar steel truss prestressed concrete composite slab provided by this utility model; Figure 8 A structural diagram showing the top horizontal reinforcement bars of the planar steel truss prestressed concrete composite slab provided by this utility model.

[0017] Wherein: 100 is the planar steel truss; 101 is the top chord reinforcement; 102 is the bottom chord reinforcement; 103 is the web reinforcement; 200 is the bottom slab; 1 is the transverse anchorage section; 2 is the prestressed tendon; 3 is the transverse reinforcement; and 4 is the top transverse reinforcement. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1-8 This utility model discloses a planar steel truss prestressed concrete composite slab, including: a planar steel truss 100 and a base plate 200, wherein the base plate 200 is preferably a concrete base plate, but the base plate 200 can also be made of other materials. Here, no specific limitation is made on the material of the base plate 200.

[0020] The planar steel truss 100 includes an upper chord steel bar 101, a lower chord steel bar 102, and web steel bars 103.

[0021] The lower chord reinforcement 102 is located directly below the upper chord reinforcement 101 and is parallel to the upper chord reinforcement 101.

[0022] The web reinforcement 103 is alternately connected between the upper chord reinforcement 101 and the lower chord reinforcement 102, and one end of the web reinforcement 103 connected to the lower chord reinforcement 102 extends out of the bottom of the lower chord reinforcement 102. The portion of the web reinforcement 103 extending out of the bottom of the lower chord reinforcement 102 is bent away from the plane formed by the upper chord reinforcement 101 and the lower chord reinforcement 102 to form a transverse anchorage section 1. The transverse anchorage section 1 along the length of the lower chord reinforcement 102 alternately faces both sides of the plane formed by the upper chord reinforcement 101 and the lower chord reinforcement 102.

[0023] Prestressed tendons 2 are provided along the length of the base plate 200, and the bottom chord reinforcement 102 and the transverse anchorage section 1 are pre-embedded in the base plate 200.

[0024] This utility model, through the above-mentioned technical solution, improves the traditional triangular spatial steel truss into a planar steel truss 100, simplifying the processing steps of the triangular spatial steel truss and saving steel consumption. Specifically, the planar steel truss 100 has a simpler manufacturing process than the triangular spatial steel truss. Compared with the triangular spatial steel truss, the planar steel truss 100 reduces the amount of one side web steel bar 103 and reduces one bottom chord steel bar 102, thereby saving steel consumption to a certain extent. By adding prestressed tendons 2 to the concrete base slab, the tensile performance and bearing capacity of the base slab 200 are improved, thereby improving the span capacity of the concrete composite slab without support.

[0025] In a further embodiment, the web reinforcement 103 is connected to one side of the plane formed by the upper chord reinforcement 101 and the lower chord reinforcement 102. That is, in a planar steel truss 100, only one web reinforcement 103 is connected to the upper chord reinforcement 101 and the lower chord reinforcement 102, which reduces the number of web reinforcement 103 compared to the two web reinforcement 103 used in the triangular spatial steel truss in the prior art.

[0026] In a further embodiment, the transverse anchoring section 1 is an arc-shaped bend or a right-angle bend. Preferably, the transverse anchoring section 1 is a right-angle bend; in other embodiments, the transverse anchoring section 1 may also be configured with other structures.

[0027] In a further embodiment, the diameter of the upper chord steel bar 101 is larger than the diameter of the lower chord steel bar 102.

[0028] In a further embodiment, at least two planar steel trusses 100 are provided on a base plate 200, each planar steel truss 100 being arranged along the length of the base plate 200, and the two planar steel trusses 100 being spaced apart. In this embodiment, preferably, the center-to-center distance of the planar steel trusses 100 on the base plate 200 is 500mm, the edge distance of the planar steel trusses 100 on the base plate 200 is 250mm, the thickness of the base plate 200 is 40mm, which is included not only as a template but also in the plate thickness. The lower chord steel bar 102 and the transverse anchorage section 1 are both located inside the base plate 200. The diameter of the lower chord steel bar 102 is 8-10mm, and the diameter of the upper chord steel bar 101 is 12-16mm. Compared with the existing triangular spatial steel trusses, the upper chord steel bar... The diameters of the upper chord steel bar 101 and the lower chord steel bar 102 are both 8-10mm, while the diameter of the upper chord steel bar 101 is adjusted to 12-16mm to further enhance the strength of the floor slab formed after the composite slab concrete is poured. In other embodiments, the center-to-side spacing of the planar steel truss 100 can be 400mm, and the edge-to-side spacing of the planar steel truss 100 can be 200mm. In specific use, the center-to-side spacing and edge-to-side spacing of the planar steel truss 100 on the base plate 200 can also be adjusted according to the actual width of the base plate 200.

[0029] In a further embodiment, the plane containing the transverse anchorage section 1 is perpendicular to the plane formed by the upper chord reinforcement 101 and the lower chord reinforcement 102. This ensures that the transverse anchorage section 1 can vertically support the planar steel truss 100.

[0030] In a further embodiment, transverse reinforcing bars 3 are also provided within the base slab 200, and the transverse reinforcing bars 3 are arranged perpendicularly to the prestressing tendons 2. When the planar steel truss prestressed concrete composite slab is a one-way slab, the transverse reinforcing bars 3 in the base slab 200 are arranged as structural reinforcements; when the planar steel truss prestressed concrete composite slab is a two-way slab, the transverse reinforcing bars 3 in the base slab 200 are arranged as transverse load-bearing reinforcements.

[0031] In a further embodiment, the transverse anchorage sections 1 on both sides of the lower chord reinforcement 102 extend out of the lower chord reinforcement 102 by equal lengths. Ensuring that the transverse anchorage sections 1 extend out of the lower chord reinforcement 102 by equal lengths on both sides ensures that when the planar steel truss 100 and the base slab 200 are used to form a concrete composite slab, the connection structure between the two sides of the planar steel truss 100 and the base slab 200 is identical, thereby ensuring the balance of forces on both sides of the planar steel truss 100.

[0032] In some embodiments, the planar steel truss prestressed concrete composite slab further includes upper transverse reinforcement 4, which spans all planar steel trusses 100 and is connected to the upper chord reinforcement 101 in each planar steel truss 100. At least two upper transverse reinforcement 4 are provided in a planar steel truss prestressed concrete composite slab, symmetrically arranged above the planar steel trusses 100 to ensure the balance during the hoisting process of the planar steel truss prestressed concrete composite slab. The arrangement of the upper transverse reinforcement 4 also ensures the connection strength between multiple planar steel trusses 100. Preferably, the upper transverse reinforcement 4 is located below the upper chord reinforcement 101.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A planar reinforced concrete composite slab with steel truss reinforcement, characterized in that, include: Planar steel truss and base slab; The planar steel truss includes top chord reinforcement, bottom chord reinforcement, and web reinforcement; The lower chord reinforcement is located directly below the upper chord reinforcement and is parallel to the upper chord reinforcement; The web reinforcement bars are alternately connected between the upper chord reinforcement bars and the lower chord reinforcement bars, and one end of the web reinforcement bar connected to the lower chord reinforcement bar extends beyond the bottom of the lower chord reinforcement bar. The portion of the web reinforcement bar extending beyond the bottom of the lower chord reinforcement bar is bent away from the plane formed by the upper chord reinforcement bar and the lower chord reinforcement bar to form a transverse anchorage section. The transverse anchorage section along the length of the lower chord reinforcement bar alternately faces both sides of the plane formed by the upper chord reinforcement bar and the lower chord reinforcement bar. The base plate has prestressed tendons arranged along its length, and the lower chord reinforcement and the transverse anchorage section are embedded in the base plate.

2. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The web reinforcement is connected to one side of the plane formed by the upper chord reinforcement and the lower chord reinforcement.

3. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The transverse anchoring section is an arc-shaped bend or a right-angle bend.

4. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The diameter of the upper chord reinforcement is larger than the diameter of the lower chord reinforcement.

5. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, At least two planar steel trusses are provided on one of the base plates, each of the planar steel trusses is provided along the length direction of the base plate, and the two planar steel trusses are provided at intervals.

6. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The plane containing the transverse anchorage section is perpendicular to the plane formed by the upper chord reinforcement and the lower chord reinforcement.

7. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The base plate is also provided with transverse steel bars, which are arranged perpendicularly to the prestressing tendons.

8. The planar reinforced concrete composite slab with steel truss structure according to claim 1, characterized in that, The transverse anchorage sections located on both sides of the lower chord reinforcement extend from the lower chord reinforcement by an equal length.

9. The planar reinforced concrete composite slab with steel truss structure according to claim 5, characterized in that, It also includes upper horizontal bars that span all of the planar steel trusses and are connected to the upper chord bars in each of the planar steel trusses.

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