Ribbed prestressed composite slab

Abstract

The utility model discloses a ribbed prestressed composite board, including the composite board, be provided with a plurality of longitudinal prestressed reinforcement along its length direction extension in the composite board, and along the width direction interval distribution of one side board of composite board has a plurality of rib structure along the length direction extension of composite board, the rib structure is provided with a plurality of recessed structure and convex structure alternately on one side away from the composite board. The utility model discloses the special-shaped rib formed by recessed structure and convex structure, makes the rib structure surface form the structure of the staggered height, can satisfy rigidity need, and the area of new and old concrete contact surface has been increased, and the new and old concrete adhesion is increased, the interface roughness is increased, the interface shear capacity is strengthened, prevents new and old concrete and happens the stagger of interface. At the same time, recessed structure is convenient for the pipeline of wearing and setting, and convex structure can be used for supporting top reinforcement, reduces the cost, improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a ribbed prestressed composite slab. Background Technology

[0002] In the field of existing engineering technology, prestressed ribbed concrete composite slabs are a commonly used prefabricated floor slab technology. A prestressed ribbed concrete composite slab refers to a prefabricated prestressed concrete ribbed base slab manufactured in a factory using a pre-tensioning process, which is then laminated with a cast-in-place reinforced concrete layer to form a prefabricated monolithic floor slab. The prefabricated ribbed base slab can be single-ribbed or multi-ribbed, and the rib structure is typically rectangular, T-shaped, or wedge-shaped. Through the design of prestressed steel reinforcement and ribs in the base slab, the rigidity of the floor slab is increased. Compared to ordinary truss reinforced concrete composite slabs, it significantly increases the unsupported span, reduces on-site construction measures, and lowers construction costs. Therefore, it is widely used in large-span factories, steel structure buildings, schools, hospitals, and other scenarios, and is particularly suitable for projects with time-sensitive or large-span requirements.

[0003] However, in practical applications, the rib height limitation results in insufficient space for electromechanical pipelines to pass through. Pipelines cannot be installed perpendicular to the ribs on the slab, leading to a concentration of pipelines within the beam. This not only increases material and construction costs but also poses a safety hazard due to excessive openings in the beam. Furthermore, to achieve high-efficiency production, this structure is typically formed by extrusion, resulting in insufficient roughness along the rib direction. This limits the shear capacity at the interface between new and old concrete, necessitating additional shear-resistant measures in practical applications. Utility Model Content

[0004] To address the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a ribbed prestressed composite slab, which solves the problems of insufficient roughness along the rib direction, limited shear bearing capacity at the interface between new and old concrete, and inconvenience in pipeline installation of existing composite slabs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A ribbed prestressed composite slab includes a composite slab, wherein a plurality of longitudinal prestressed steel bars extending along its length are provided in the composite slab, and a plurality of rib structures extending along the length of the composite slab are distributed at intervals along its width on one side of the composite slab surface, wherein a plurality of recessed structures and protruding structures are alternately provided on the side of the rib structures away from the composite slab.

[0006] As an optimization, the longitudinal prestressed steel bars are made of steel strand or threaded steel.

[0007] As an optimization, the longitudinal cross-sectional shape of the recessed or raised structure along the length of the rib structure includes a rectangle, trapezoid, triangle or arc, so that the surface of the rib structure away from the composite plate forms a sawtooth or wave-shaped structure extending along the length of the rib structure.

[0008] As an optimization, multiple transverse reinforcing bars extending along the width of the composite slab are also provided.

[0009] Compared with the prior art, this application has the following advantages: This utility model, The irregularly shaped ribs formed by the concave and convex structures create a staggered surface, satisfying rigidity requirements while increasing the contact area between new and old concrete, thus enhancing adhesion, increasing interface roughness, and strengthening shear resistance, preventing displacement at the interface. Simultaneously, the concave structure facilitates pipeline installation, avoiding the safety hazards of excessive openings in the beam caused by pipelines running through it. Furthermore, the convex structure serves as support for the top reinforcement during on-site construction, reducing the need for additional supports—essentially acting as stirrups—reducing construction costs and improving efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model; In the diagram, 1 is a composite slab, 2 is a rib structure, 3 is a recessed structure, 4 is a raised structure, 5 is longitudinal prestressed steel bars, and 6 is transverse steel bars. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] For specific implementation: see [link / reference] Figures 1-2 , An embodiment of a ribbed prestressed composite slab includes a composite slab 1, wherein a plurality of longitudinal prestressed steel bars 5 extending along its length are provided in the composite slab 1. The longitudinal prestressed steel bars 5 are made of steel strand or threaded steel, which has better pull-out resistance. A plurality of rib structures 2 extending along the length of the composite slab 1 are distributed at intervals along its width direction on one side of the composite slab surface. A plurality of recessed structures 3 and protruding structures 4 are alternately provided on the side of the rib structures 2 away from the composite slab 1.

[0013] The irregularly shaped ribs formed by the recessed structure 3 and the raised structure 4 create a staggered structure on the surface of the rib structure 2. This satisfies the stiffness requirements while increasing the contact area between the old and new concrete, thus increasing the adhesion between them, improving the interface roughness, enhancing the interface shear resistance, and preventing displacement between the old and new concrete at the interface. Simultaneously, the recessed structure 3 facilitates the installation of pipelines, avoiding the safety hazards of excessive openings in the beam caused by pipelines running through it. Furthermore, the raised structure 4 of the rib structure 2 can serve as a support for the top reinforcement during on-site construction, reducing the need for additional supports, essentially acting as a stirrup, reducing construction costs, and improving construction efficiency.

[0014] Specifically, the recessed structure 3 penetrates both sides of the rib width direction of the rib structure 2, so it can be used to install pipelines, which facilitates the arrangement of pipelines in the floor slab, reduces material and construction costs, and also reduces the safety hazards caused by opening pipeline holes in the beam transition.

[0015] More specifically, the longitudinal cross-sectional shape of the recessed structure 3 or the raised structure 4 along the length of the rib structure 2 includes a rectangle, trapezoid, triangle or arc, so that the surface of the rib structure 2 away from the composite plate 1 forms a sawtooth structure or wave structure extending along the length of the rib structure 2.

[0016] In this embodiment, the recessed structure 3 and the raised structure 4 form a continuous wave structure, and the recessed structure 3 penetrates both sides of the rib structure 2 in the width direction to facilitate the installation of pipelines. The bottom elevation of the recessed structure 3 is higher than the corresponding side surface of the composite plate 1 to ensure the strength of the rib structure 2. More specifically, the specific shape of the wave structure can be formed by curves such as sine, cosine, or parabola, which is simple in structure and easy to produce.

[0017] For two-way composite slabs, multiple transverse reinforcing bars 6 extending along their width are provided in the composite slab 1. For one-way composite slabs, however, transverse reinforcing bars 6 are not required, and the strength requirements can be met by relying solely on longitudinal prestressed reinforcing bars 5.

[0018] In summary, this utility model 1. By setting irregular ribs, the shape of the rib structure is staggered, which can not only meet the rigidity requirements, but also facilitate the arrangement of pipelines at low positions. 2. The arc-shaped ribs increase the contact area between the old and new concrete, thereby enhancing the adhesion between them. Additionally, the arc shape reduces stress concentration, effectively preventing cracking.

[0019] 3. The staggered height of the ribs increases the surface roughness, enhances the shear resistance of the interface, and prevents the old and new concrete from shifting at the interface.

[0020] 4. The raised structure can be used to support the top steel bars, reducing the use of supporting components, lowering costs and improving construction efficiency.

[0021] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A ribbed prestressed composite slab, comprising a composite slab, wherein a plurality of longitudinal prestressed steel bars extending along its length are disposed therein, and a plurality of rib structures extending along the length of the composite slab are spaced apart along its width on one side of the composite slab surface, characterized in that, The rib structure has several recessed and raised structures alternately on the side away from the composite slab; the recessed structure runs through both sides of the rib structure in the rib width direction; and multiple transverse steel bars extending along the width direction are also provided in the composite slab.

2. The ribbed prestressed composite slab according to claim 1, characterized in that, The longitudinal prestressed steel bars are made of steel strand or threaded steel.

3. A ribbed prestressed composite slab according to claim 1, characterized in that, The longitudinal cross-sectional shape of the recessed or raised structure along the length of the rib structure includes rectangle, trapezoid, triangle or arc, so that the surface of the rib structure away from the composite plate forms a sawtooth or wave-shaped structure extending along the length of the rib structure.

Images