Connecting structure of steel bar truss floor support plate and concrete beam

Abstract

The utility model relates to the technical field of concrete floor slab structures, in particular to a connecting structure of a steel bar truss floor support plate and a concrete beam, which comprises a stress bar erected above a concrete beam frame, the stress bar and the concrete beam frame are arranged in a cross shape, and two ends of the stress bar are fixedly connected with steel bar components on two sides of the concrete beam frame respectively. The two ends of the stress rib are in a vertically downward bending state; the supporting assembly is fixed to the lower portion of the concrete beam frame and comprises a scaffold fixed to the ground and a supporting mold detachably connected to the upper portion of the scaffold, the upper end of the supporting mold is fixed to a bottom plate of the floor bearing plate, and the supporting mold is in a groove shape and wraps the lower portion of the concrete beam frame; an upper reinforcing rib and a lower reinforcing rib are further fixed to the floor support plate, and the upper reinforcing rib, the lower reinforcing rib and the length direction of the floor support plate are arranged in a cross shape. The stability of the connecting part of the floor support plate and the concrete beam can be improved, the stress deformation of the structure is reduced, and the bearing capacity is improved.

Description

Technical Field

[0001] The technical field related to the present utility model is specifically a connection structure between a steel bar truss floor slab and a concrete beam. Background Technique

[0002] The steel bar truss floor slab is a composite building material widely used in the construction industry, mainly used for the structural support of floors and roofs, and has the functions of bearing and transferring loads.

[0003] Before pouring concrete, the steel bar truss floor slab needs to be connected to the steel bar structure of the concrete beam, so that all the floor slabs are fixed to the concrete beam. All the floor slabs are laid between all the concrete beams, providing a flat base surface as the pouring formwork for concrete. Then, concrete is poured onto the steel bar truss and the steel bars of the concrete. After the concrete solidifies, the floor slab and the concrete beam can form an integral floor slab.

[0004] In the construction of the steel bar truss floor slab and the concrete beam, to ensure the stability of the floor slab and the safety of the entire building structure, the connection point structure between the floor slab and the concrete beam is a key part in the building structure design. The prior art "Steel plate concrete composite beam with double-sided steel bar truss floor slab" (publication number: CN109339319B) discloses a connection point structure between a steel bar truss floor slab and a concrete beam. Two floor slabs are respectively located on both sides of the steel bars of the concrete beam, and a first distribution bar and a second distribution bar are welded between the two floor slabs for connection. The first distribution bar and the second distribution bar are arranged perpendicular to the concrete beam in a cross shape, so that the two end floor slabs are erected on the concrete beam to achieve connection and fixation. However, the prior art still has the following technical problems:

[0005] Since concrete needs to be poured on the steel bar truss floor slab and the concrete beam after they are installed, and the connection structure in the prior art only relies on the first distribution bar and the second distribution bar to weld and fix the floor slabs on both sides of the concrete beam. Then, when the pressure during concrete pouring is relatively large, the weight of the concrete and the internal stress during pouring are likely to bend and deform the floor slab and the steel bars of the concrete beam. When the concrete solidifies, the bending resistance of the deformed steel bars at this part becomes weaker, and over time, it is easy to cause cracks or even breakage risks in the floor slab and the concrete beam. Summary of the Utility Model

[0006] The present utility model provides a connection structure between a steel bar truss floor slab and a concrete beam, which can solve the problem that the connection structure between the floor slab and the concrete beam in the prior art has weak bending resistance and is prone to cause cracks or even breakage in the floor slab after pouring concrete.

[0007] The present application provides the following technical solution: a connection structure between a steel bar truss floor slab and a concrete beam, including a concrete beam frame and floor slabs fixed on both sides of the concrete beam frame; the floor slab includes a bottom plate and a steel bar assembly fixed on the bottom plate, and the steel bar assembly includes upper chord steel bars, lower chord steel bars and connecting bars fixed between the two.

[0008] It further includes a stress bar erected above the concrete beam frame, and the stress bar is arranged in a cross shape with the concrete beam frame. The two ends of the stress bar are respectively fixedly connected to the steel bar assemblies on both sides of the concrete beam frame, and the two ends of the stress bar are bent vertically downward.

[0009] It further includes a support assembly fixed below the concrete beam frame. The support assembly includes a scaffold fixed on the ground and a support formwork detachably connected above the scaffold. The upper end of the support formwork is fixedly connected to the bottom plate of the floor slab. The support formwork is in a groove shape and wraps the lower part of the concrete beam frame.

[0010] Above all upper chord steel bars of each floor slab, upper reinforcement bars are further fixed, and above all lower chord steel bars, lower reinforcement bars are further fixed. The upper reinforcement bars and the lower reinforcement bars are arranged in a cross shape with the length direction of the floor slab.

[0011] Beneficial effects:

[0012] 1. Improve the bearing capacity. The upper reinforcement bars and the lower reinforcement bars are arranged in a cross shape with the floor slab, and the stress bar is erected in a cross shape on the concrete beam frame and is respectively fixedly connected to the steel bar assemblies of the floor slab at both ends. On the one hand, the number of steel bars here is increased, enhancing the bearing capacity of the floor slab and the concrete beam frame. At the same time, the two ends of the stress bar are bent vertically downward. When a downward load is applied to the middle of the stress bar, the bent sections at both ends of the stress bar will expand and deform outward towards both ends, and the solidified concrete will have a reverse force on the bent sections to resist the expansion deformation of the bent sections, reducing the deformation of the middle of the stress bar, thereby enhancing the anti-bending moment capacity of the connection part between the concrete beam frame and the two side floor slabs and ensuring the strength and stability of the structure.

[0013] 2. Improve the pouring stability. The support assembly can provide temporary support below the concrete beam frame. The support formwork is designed in a groove shape and can wrap the lower part of the concrete beam frame, so that when pouring concrete, the concrete can fill the concrete beam frame and form the shape of a rectangular beam, ensuring that the floor slab and the concrete beam frame can maintain their shapes during concrete pouring and improving the stability during concrete pouring.

[0014] Further, the concrete beam frame includes a plurality of rectangular steel bars and a plurality of longitudinal steel bars fixed inside the circumference of the rectangular steel bars. The plurality of rectangular steel bars are evenly distributed at equal intervals along the axial length direction of the longitudinal steel bars.

[0015] Beneficial effects: The rectangular steel bars form a closed rectangular frame, which is fixed with the longitudinal steel bars to form the skeleton of the concrete beam, increasing the longitudinal and lateral stability. After the concrete is poured, it can enhance the bearing capacity of the concrete beam when subjected to load forces. The rectangular steel bars are evenly distributed at equal intervals along the axial length direction of the longitudinal steel bars, ensuring that the concrete beam frame has uniform structural strength and stiffness throughout the whole length, and improving the overall stability and consistency of the beam.

[0016] Further, the support formwork includes an inner formwork and an outer formwork; the inner formwork wraps the rectangular steel bars inside, and the outer formwork wraps the inner formwork inside.

[0017] Beneficial effects: The inner formwork wraps the rectangular steel bars inside, ensuring that the concrete forms the shape of a rectangular beam during concrete pouring, while the outer formwork prevents any deformation or displacement of the inner formwork before the concrete hardens, ensuring the stability of the concrete during the pouring process.

[0018] Further, the inner formwork includes a bottom formwork located below the rectangular steel bars and side formworks located on both sides of the rectangular steel bars.

[0019] Beneficial effects: The bottom formwork is located below the rectangular steel bars and is used to support the shape of the bottom of the concrete beam. The side formworks are located on both sides of the rectangular steel bars and can enclose the sides of the concrete beam to prevent the concrete from overflowing during pouring; thus, during concrete pouring, the structural shape and dimensional accuracy of the concrete beam are guaranteed.

[0020] Further, the outer formwork includes a bottom wooden board located above the scaffolding, a lower wooden block located above the bottom wooden board, a support wooden block located above the lower wooden block, and an upper wooden block located above the support wooden block. The lower wooden block, the support wooden block, and the upper wooden block are all located outside the side formworks, and the upper wooden block is fixed to the bottom plate of the floor slab with steel nails.

[0021] Beneficial effects: The entire outer formwork is used to provide stable support for the inner formwork, preventing the inner formwork from falling apart during concrete pouring. At the same time, the upper wooden block is fixed to the bottom plate with steel nails, which is convenient for demolition after the concrete pouring is completed, improving the demolition convenience.

[0022] Further, the inner formwork is also provided with screws. The screws are horizontally arranged on the longitudinal steel bars, and both ends of the screws extend outside the side formworks, and nuts for tightening the side formworks are provided at both ends of the screws.

[0023] Beneficial effects: The screws are horizontally arranged on the longitudinal steel bars to provide lateral restraint for the inner formwork, preventing expansion or deformation due to the lateral pressure of the concrete during the concrete pouring process, ensuring the stability of the inner formwork during concrete pouring, and guaranteeing the forming accuracy of the concrete beam.

[0024] Furthermore, transverse steel bars and vertical steel bars are also provided at both ends of the floor decking. The transverse steel bars are fixed below the lower chord steel bars, and the vertical steel bars are fixed between the upper chord steel bars and the bottom plate. The intersection of the transverse steel bars and the vertical steel bars is fixedly connected.

[0025] Beneficial effects: The setting of the transverse steel bars and vertical steel bars at both ends of the floor decking can enhance the stability and load-bearing capacity of the floor decking structure, ensure that the floor decking can withstand various loads during construction and use, and at the same time maintain the integrity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front view of the present utility model.

[0027] Figure 2 is Figure 1 the enlarged view of the floor decking in

[0028] Figure 3 is Figure 2 the top view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following is a more detailed description through specific embodiments:

[0030] The reference signs in the attached drawings of the specification include: upper tie bar 1, upper reinforcing bar 2, connecting bar 3, upper chord steel bar 4, stress bar 5, lower tie bar 6, lower reinforcing bar 7, lower chord steel bar 8, bottom plate 9, longitudinal steel bar 10, rectangular steel bar 11, transverse steel bar 12, vertical steel bar 13, bottom wooden board 14, longitudinal steel pipe 15, vertical steel pipe 16, upper wooden block 17, steel nail 18, supporting wooden block 19, side formwork 20, screw rod 21, nut 22, lower wooden block 23, bottom formwork 24.

[0031] Embodiment 1

[0032] As Figures 1 to 3 shown, the connection structure between the steel bar truss floor decking and the concrete beam includes a concrete beam frame, floor deckings fixed on both sides of the concrete beam frame, stress bars 5 erected above the concrete beam frame, and a support assembly fixed below the concrete beam frame.

[0033] As Figure 1 shown, Figure 1 is the cross-sectional view of the concrete beam frame. The concrete beam frame includes a plurality of rectangular steel bars 11 and a plurality of longitudinal steel bars 10 welded and fixed inside the circumferences of the rectangular steel bars 11. The plurality of rectangular steel bars 11 are evenly distributed at equal intervals along the axial length direction of the longitudinal steel bars 10, thereby forming the steel bar skeleton of the concrete beam.

[0034] As Figures 1 to 3 shown, the floor decking is composed of multiple small pieces spliced together. A single floor decking is as Figure 2 and Figure 3As shown, it includes a bottom plate 9 and a steel bar assembly fixed on the bottom plate 9. The steel bar assembly includes an upper chord steel bar 4, a lower chord steel bar 8, and connecting bars 3 fixed between the two. Each floor slab includes one upper chord steel bar 4 and two lower chord steel bars 8, forming a triangular point layout. As Figure 3 shown, the connecting bar 3 is a corrugated steel bar. The top of the connecting bar 3 is welded to the upper chord steel bar 4, the lower end of the connecting bar 3 is welded to the lower chord steel bar 8, and the bottom of the connecting bar 3 is welded to the upper end of the bottom plate 9. Transverse steel bars 12 and vertical steel bars 13 are also provided at both ends of the floor slab. The transverse steel bars 12 are horizontally welded and fixed below the lower chord steel bar 8. The upper and lower ends of the vertical steel bars 13 are respectively welded to the upper chord steel bar 4 and the bottom plate 9, and the intersection of the transverse steel bars 12 and the vertical steel bars 13 is spot welded and fixed.

[0035] As Figure 1 shown, a plurality of upper reinforcing bars 2 are further fixed above all the upper chord steel bars 4 of each floor slab, and a plurality of lower reinforcing bars 7 are further fixed above all the lower chord steel bars 8. The upper reinforcing bars 2 and the lower reinforcing bars 7 are both arranged in a cross shape with the longitudinal steel bar 10. A plurality of upper tie bars 1 are horizontally arranged above the upper reinforcing bars 2, and a plurality of lower tie bars 6 are horizontally arranged above the lower reinforcing bars 7. The upper tie bars 1 and the lower tie bars 6 further improve the connection strength of all the steel bars.

[0036] As Figure 1 shown, the stress bar 5 is erected above the rectangular steel bar 11, and the arrangement direction is in a cross shape with the longitudinal steel bar 10. The two ends of the stress bar 5 are respectively welded and fixed to the steel bar assemblies on both sides of the rectangular steel bar 11, and the two ends of the stress bar 5 are in a state of being bent vertically downward.

[0037] As Figure 1 shown, the support assembly includes a scaffolding fixed on the ground and a support formwork detachably connected above the scaffolding. During actual construction, scaffolding is provided under both the floor slab and the support assembly. For the convenience of display in this application, only part of the schematic diagram is retained in Figure 1 which. The scaffolding includes longitudinal steel pipes 15 and vertical steel pipes 16, and the longitudinal steel pipes 15 and the vertical steel pipes 16 are both connected and fixed by screw fasteners.

[0038] The support formwork includes an inner formwork and an outer formwork; the inner formwork includes a bottom form 24 located below the rectangular steel bar 11 and side forms 20 located on both sides of the rectangular steel bar 11. The bottom form 24 and the side forms 20 form a groove shape to wrap the rectangular steel bar 11 inside. A screw rod 21 is also provided on the inner formwork. The screw rod 21 is horizontally erected on the longitudinal steel bar 10, and the intersection of the screw rod 21 and the longitudinal steel bar 10 is spot welded and fixed. The two ends of the screw rod 21 respectively extend to the outside of the side form 20, and nuts 22 for tightening the side form 20 are provided at both ends of the screw rod 21.

[0039] The outer mold includes a bottom wooden board 14 tied above the scaffolding with iron wire, a lower wooden block 23 above the bottom wooden board 14, a supporting wooden block 19 above the lower wooden block 23, and an upper wooden block 17 above the supporting wooden block 19. The lower wooden block 23, the supporting wooden block 19, and the upper wooden block 17 are all located outside the side mold 20, wrapping the entire inner mold inside. The upper wooden block 17 and the bottom plate 9 of the floor slab are fixed with steel nails 18.

[0040] The principle of the present utility model is as follows:

[0041] Since the upper reinforcing rib 2 and the lower reinforcing rib 7 are arranged in a cross shape with the floor slab, and the stress bar 5 is cross-shaped and erected on the concrete beam frame, and at the same time, both ends of the stress bar 5 are respectively fixed to the steel bar assembly of the floor slab. On the one hand, the number of steel bars here is increased, enhancing the bearing capacity of the floor slab and the concrete beam frame. At the same time, both ends of the stress bar 5 are vertically bent downward. When a downward load is applied to the middle of the stress bar 5, the bent sections at both ends of the stress bar 5 will expand and deform outward towards both ends. The solidified concrete has a reverse acting force on the bent sections to resist the expansion deformation of the bent sections, reducing the deformation in the middle of the stress bar 5, thereby enhancing the anti-bending moment capacity of the connection part between the concrete beam frame and the two side floor slabs, ensuring the strength and stability of the structure. The support assembly can provide temporary support under the concrete beam frame. The support mold is designed as a groove type, which can wrap the lower part of the concrete beam frame inside, so that when pouring concrete, the concrete can fill the concrete beam frame and form the shape of a rectangular beam, ensuring that the floor slab and the concrete beam frame can maintain their shapes during concrete pouring, enhancing the stability during concrete pouring. The above are only the embodiments of the present utility model. The utility model is not limited to the fields involved in this embodiment case. Common knowledge such as the specific structures and characteristics known in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation methods described in the specification can be used to interpret the content of the claims.

Claims

1. A connection structure of a steel truss floor deck and a concrete beam, comprising a concrete beam frame and floor decks fixed on both sides of the concrete beam frame; the floor deck comprises a bottom plate and a steel bar assembly fixed on the bottom plate, the steel bar assembly comprises an upper chord steel bar, a lower chord steel bar and a connecting bar fixed therebetween, characterized in that: It also includes stress-bearing bars erected above the concrete beam frame, the stress-bearing bars and the concrete beam frame are arranged in a cross shape, the two ends of the stress-bearing bars are respectively fixedly connected to the steel bar assemblies on both sides of the concrete beam frame, and the two ends of the stress-bearing bars are in a state of being bent vertically downward; It also includes a support assembly fixed below the concrete beam frame, the support assembly includes a scaffold fixed on the ground and a support form detachably connected above the scaffold, the upper end of the support form is fixed to the bottom plate of the floor deck, the support form is in a groove shape, and wraps the lower part of the concrete beam frame inside; Upper reinforcing ribs are fixed above all the upper chord steel bars of each floor decking plate, and lower reinforcing ribs are fixed above all the lower chord steel bars. The upper reinforcing ribs and the lower reinforcing ribs are arranged in a cross shape in the length direction of the floor decking plate.

2. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 1 is characterized in that: The concrete beam frame comprises a plurality of rectangular steel bars and a plurality of longitudinal steel bars fixed on the inner circumference of the rectangular steel bars, and the plurality of rectangular steel bars are evenly and equidistantly distributed along the axial length direction of the longitudinal steel bars.

3. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 2 is characterized in that: The supporting mold comprises an inner mold and an outer mold; the inner mold wraps the rectangular steel bars inside, and the outer mold wraps the inner mold inside.

4. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 3 is characterized in that: The inner mold comprises a bottom mold located below the rectangular steel bar and side molds located on both sides of the rectangular steel bar.

5. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 4 is characterized in that: The outer formwork includes a bottom wooden board located above the scaffolding, a lower wooden block located above the bottom wooden board, a supporting wooden block located above the lower wooden block, and an upper wooden block located above the supporting wooden block. The lower wooden block, the supporting wooden block, and the upper wooden block are all located on the outside of the side formwork, and the upper wooden block is fixed to the bottom plate of the floor decking with steel nails.

6. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 5 is characterized in that: The inner mold is also provided with a screw rod, which is horizontally mounted on the longitudinal steel bars. The two ends of the screw rod extend outward from the side molds respectively, and the two ends of the screw rod are provided with nuts for tightening the side molds.

7. The connection structure of the steel bar truss floor deck and the concrete beam according to claim 6 is characterized in that: The two ends of the floor deck are also provided with transverse reinforcements and vertical reinforcements. The transverse reinforcements are fixed below the lower chord reinforcements, and the vertical reinforcements are fixed between the upper chord reinforcements and the bottom plate. The intersection of the transverse reinforcements and the vertical reinforcements is fixedly connected.

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