Modular stiff lightweight concrete main and secondary beam joint

Abstract

This invention relates to a modular, rigid, lightweight concrete primary and secondary beam joint, belonging to the field of high-performance prefabricated building structure technology. The primary and secondary beam joint includes at least two mutually perpendicular limbs. Each limb comprises a rigid frame, lightweight concrete, and a cross-shaped box-type component. The rigid frame and lightweight concrete are cast together to form the cross-shaped box-type component. The cross-shaped box-type component is located at the ends of each lightweight concrete limb. The horizontal lightweight rigid chords in the rigid frame form a "well" shape, with reinforcement zones at their ends, and are connected to the upper and lower ends of lightweight rigid vertical members inside the reinforcement zones. The horizontal lightweight rigid chords are located on the edges along the beam axis at each end of the beam-column joint, and their ends are provided with connecting through holes. The primary and secondary beam joints are connected to the primary and secondary beams via connectors inserted into the connecting through holes.

Description

Technical Field

[0001] This invention relates to a modular, rigid, lightweight concrete primary and secondary beam joint, belonging to the field of high-performance prefabricated building structure technology. Background Technology

[0002] Prefabricated concrete structures are an important structural form that meets the upgrading needs of the construction industry. Current mainstream technical solutions mainly include: fully prefabricated monolithic reinforced concrete shear wall structures, fully prefabricated monolithic reinforced concrete frame structures, prefabricated steel-concrete composite structures, and prefabricated steel-reinforced concrete structures. All of these structures are assembled from prefabricated components in a factory, with connection methods primarily including bolted connections, rebar lap splices, and grouting sleeves.

[0003] However, existing prefabricated modular structures have extremely large individual components and complex connections between components. This necessitates the use of large-scale engineering machinery and numerous specialized construction personnel for construction and installation, which undoubtedly increases construction costs and reduces construction speed. (For example, CN214833408U discloses a connection node between a precast main beam and a cast-in-place secondary beam, including a precast main beam and a cast-in-place secondary beam connected to the assembly surface of the precast main beam. The assembly surface is marked with a cast-in-place secondary beam installation area that matches the cross-section of the cast-in-place secondary beam. Pre-embedded reinforcing bars and straight threaded sleeves connected to the pre-embedded reinforcing bars are pre-embedded within the installation area. The end face of the protruding end of the straight threaded sleeve is flush with the assembly surface. The interior of the cast-in-place secondary beam...) A cast-in-place secondary beam reinforcement cage is provided, with the extended ends of the bottom reinforcing bars of the cage connected to straight threaded sleeves. Shear keyways are provided within the installation area of ​​the cast-in-place secondary beam. For example, CN210164046U discloses a prefabricated main beam and secondary beam connection node structure, including a prefabricated main beam and a prefabricated secondary beam. Transverse U-shaped reinforcing bars are embedded within the prefabricated main beam. The connection surfaces of the main beam and secondary beam are roughened, while the secondary beam surface has keyways. The U-shaped reinforcing bars are welded to the protruding bars of the prefabricated secondary beam, with the center lines of the U-shaped reinforcing bars and the protruding bars aligned vertically or horizontally. Denser stirrups are provided at the lap joints. After the upper longitudinal reinforcement and stirrups of the prefabricated main beam and secondary beam are placed, concrete is poured to form a unified structure. Furthermore, existing prefabricated concrete structures are designed as permanent structures, without emphasizing the ease of demolition or the feasibility of reconstruction according to user needs. Therefore, for special scenarios, such as training facilities and temporary buildings, it cannot meet the requirements of flexible disassembly and reconstruction in multiple scenarios, convenient assembly, and rapid construction without the assistance of heavy machinery. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, and in order to improve efficiency, reduce construction procedures, and lower construction difficulty, while combining the advantages of metal and concrete, this invention proposes a modular, rigid, lightweight concrete primary and secondary beam joint to solve problems such as steel bar bending, lap splicing, and complex procedures at the joint.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A modular rigid lightweight concrete primary and secondary beam joint, the primary and secondary beam joint including at least two mutually perpendicular limbs, each limb of the primary and secondary beam joint including a rigid frame, lightweight concrete and a cross-shaped box member inside, the rigid frame and lightweight concrete being cast together to form a cross-shaped box member or a triaxial box member; the interior of the cross-shaped box member is through the interior of the lightweight concrete.

[0007] The horizontal lightweight stiffening chords in the stiffened frame form a "well" shape, with a reinforcement zone at the end, and are connected to the upper and lower ends of the lightweight stiffening vertical members inside the reinforcement zone; the horizontal lightweight stiffening chords are set on the edges along the beam axis at each end of the beam-column joint, and their ends are provided with connecting through holes.

[0008] The primary and secondary beam nodes are connected to the primary and secondary beams by connectors inserted into the connecting through holes.

[0009] Furthermore, multiple round holes are formed on the lightweight rigid vertical rod.

[0010] Furthermore, the cross-shaped box-type component has primary and secondary beam nodes running through its interior, and the interior of the cross-shaped box-type component is rectangular or other various shapes.

[0011] Furthermore, the lightweight concrete is foamed concrete or lightweight aggregate concrete.

[0012] Furthermore, the rigid frame is made of aluminum alloy, carbon fiber, or basalt fiber.

[0013] Furthermore, an end reinforcement is also connected to the outer end of the horizontal lightweight stiff chord, and the connecting through hole is provided on the end reinforcement.

[0014] Furthermore, the outer end of the horizontal lightweight stiff chord is thickened to form an end reinforcement zone; the connecting through hole is provided on the end reinforcement zone.

[0015] Furthermore, the connecting through hole is made of PVC pipe, steel pipe, aluminum alloy pipe or carbon fiber pipe.

[0016] Furthermore, the horizontal lightweight stiffened chord and the lightweight stiffened vertical member are welded or bolted together.

[0017] Furthermore, the length and thickness of the horizontal lightweight stiffened chords in adjacent limbs may be the same or different; the width and thickness of different groups of lightweight stiffened vertical bars in each limb may be the same or different.

[0018] The modular, stiff, lightweight concrete primary and secondary beam joint proposed in this invention has the following specific technical effects:

[0019] This invention proposes a modular, rigid, lightweight concrete frame structure system. This system adopts modular installation, with each component module being lightweight. The components are connected by a completely dry connection, which is simple and convenient for disassembly and assembly without the need for heavy machinery. This significantly improves the construction speed and reduces the complexity, thereby enhancing the versatility of prefabricated concrete structures.

[0020] 1. Adopting a modular and standardized design, the structure has fewer similar component sizes and models, advocating for the use of on-demand component combinations to achieve diverse and flexible building configurations. 2. Replacing steel in traditional prefabricated composite structures with lightweight, rigid materials (including organic and inorganic materials; organic materials include POM, carbon fiber, basalt fiber, etc.; inorganic materials include various lightweight metals such as aluminum alloys, aluminum-magnesium alloys, titanium alloys, etc.) and replacing ordinary concrete in traditional prefabricated composite structures with lightweight concrete. These measures significantly reduce component weight. 3. Addressing the complex connection issues between components in existing prefabricated composite structures: This structure optimizes component connection methods, reduces the number of connecting bolts, and innovatively adopts inter-column socket connections, greatly simplifying the complexity of component connections and making repeated disassembly and assembly possible. 4. The lightweight, rigid frame is exposed or shallowly embedded in the corners of the components, with no other reinforcing frame inside the lightweight concrete.

[0021] The primary and secondary beam joint components of this invention enable rapid and efficient connection of primary and secondary beam components while ensuring installation accuracy. Furthermore, the rigid frame primarily bears the loads against bending and torsional moments. Additionally, the lightweight concrete resists vertical loads, and the cross-shaped box-type components reduce the overall weight of the primary and secondary beam joint components, facilitating manual installation. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of a modular, rigid, lightweight concrete main and secondary beam joint according to the present invention;

[0023] Figure 2 This is a schematic diagram of a modular, rigid, lightweight concrete main and secondary beam joint rigid frame according to the present invention;

[0024] Figure 3 This is an overall schematic diagram of another modular, rigid, lightweight concrete main and secondary beam joint of the present invention;

[0025] Figure 4 This is a schematic diagram of another modular, rigid, lightweight concrete main and secondary beam joint rigid frame of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection between the main beam and the secondary beam in the modular rigid lightweight concrete main and secondary beam joint of the present invention.

[0027] Figure 6 This is a schematic diagram of the interior of the cross-shaped box-type component of the modular rigid lightweight concrete main and secondary beam nodes of the present invention. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0029] Example 1

[0030] like Figure 1-2 As shown in this embodiment, a modular rigid lightweight concrete primary and secondary beam joint includes at least two mutually perpendicular limbs. Each limb of the primary and secondary beam joint includes a rigid frame 2, lightweight concrete 1, and a cross-shaped box-shaped component interior 3. The rigid frame 2 and lightweight concrete 1 are cast together to form a cross-shaped box-shaped component. The cross-shaped box-shaped component interior 3 is located at the ends of each limb of the lightweight concrete 1.

[0031] like Figure 2 As shown, the horizontal lightweight rigid chord members 2-1 in the rigid frame 2 form a "well" shape, with reinforcement zones at their ends, and are connected to the upper and lower ends of the lightweight rigid vertical members 2-4 inside the reinforcement zones. The horizontal lightweight rigid chord members 2-1 and the lightweight rigid vertical members 2-4 are welded together, and multiple round holes are opened on the lightweight rigid vertical members 2-4. The horizontal lightweight rigid chord members 2-1 are set on the edges along the beam axis at each end of the beam-column joint, and their ends are provided with connecting through holes 2-3. The outer ends of the horizontal lightweight rigid chord members 2-1 are also connected to end reinforcement members 2-2, and the connecting through holes 2-3 are set on the end reinforcement members 2-2, which are made of PVC pipes.

[0032] like Figure 5 As shown, the main beam and secondary beam nodes are connected to the main beam and secondary beam by connectors inserted into the connecting through holes 2-3.

[0033] like Figure 1 The interior of the cross-shaped box member has 3 through the main and secondary beam nodes, and the interior of the cross-shaped box member has 3 in a rectangular shape.

[0034] In this embodiment, the lightweight concrete 1 used is foamed concrete, the rigid frame 2 is made of aluminum alloy, and the horizontal lightweight rigid chords 2-1 in adjacent limbs have the same length and thickness. The widths of different groups of lightweight rigid vertical bars 2-4 in each limb are different, but the thicknesses are the same. For example, Figure 2 As shown, each limb has two sets of lightweight stiff vertical members 2-4. One set is welded to the horizontal lightweight stiff chord member 2-1, and the other set is bolted to the lightweight stiff vertical member 2-4 and the end reinforcement member 2-2. The anchoring end on the horizontal lightweight stiff chord member 2-1 is L-shaped.

[0035] Embodiment 2

[0036] As Figure 3-5 shown, for another modular rigid lightweight concrete primary and secondary beam joint in this embodiment, the thickness of the outer end of the horizontal lightweight rigid chord 2-1 is increased to form an end strengthening area. The connecting through holes 2-3 and the outermost group of lightweight rigid vertical rods 2-4 are arranged on the end strengthening area. The lengths and thicknesses of the horizontal lightweight rigid chords 2-1 within adjacent limbs are the same, and the widths and thicknesses of different groups of lightweight rigid vertical rods 2-4 of each limb are the same. The anchoring end 2-5 arranged thereon is in the shape of an I-beam.

[0037] As Figure 5 shown, the connectors for connecting the primary and secondary beam joint to the primary beam and the secondary beam include L-shaped or concave-shaped plates. A "day" - shaped support is arranged on the outer side of the L-shaped plate. The tie bolts pass through the connectors and the connecting through holes 2-3, thereby connecting the primary and secondary beam joint to the primary beam and the secondary beam. At the same time, the "day" - shaped support can play a role in supporting each floor slab. In addition, tapping holes are arranged at the upper end of the L-shaped plate for connecting to the wall panel.

[0038] Other structures and connection methods are the same as those in Embodiment 1 and will not be elaborated here.

[0039] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the structure of the present invention. The layout form and the quantity used of the present invention are not limited to this example either, and can be optimized according to the actual engineering situation. Any modification, equivalent change and decoration made to the above embodiments based on the technical principle of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A modularized stiffened lightweight concrete primary and secondary beam joint comprising at least two legs perpendicular to each other, characterized in that: Each limb of the main and secondary beam nodes includes a rigid frame (2), lightweight concrete (1), and a cross-shaped box-type component interior (3). The rigid frame (2) and lightweight concrete (1) are poured together to form a cross-shaped box-type component. The horizontal lightweight stiffening chords (2-1) in the stiffening frame (2) form a "well" shape, with a reinforcement zone at the end, and are connected to the upper and lower ends of the lightweight stiffening vertical members (2-4) inside the reinforcement zone; the horizontal lightweight stiffening chords (2-1) are set on the edges along the beam axis at each end of the beam-column node, and are provided with connecting through holes (2-3) at their ends. The main and secondary beam nodes are connected to the main beam and the secondary beam by connectors inserted into the connecting through holes (2-3); The interior (3) of the cross-shaped box member penetrates the main and secondary beam nodes, and the interior (3) of the cross-shaped box member is rectangular or other various shapes; the outer end of the horizontal lightweight stiff chord (2-1) is also connected to an end reinforcement (2-2), and the connecting through hole (2-3) is set on the end reinforcement (2-2); the outer end of the horizontal lightweight stiff chord (2-1) is thickened to form an end reinforcement area; the connecting through hole (2-3) is set on the end reinforcement area.

2. The modular, stiffened, lightweight concrete primary and secondary beam joint according to claim 1, characterized in that: Multiple round holes are provided on the lightweight and rigid vertical rod (2-4).

3. The modular, stiffened, lightweight concrete primary and secondary beam joint according to claim 1, characterized in that: The lightweight concrete (1) is foamed concrete or lightweight aggregate concrete.

4. The modular, stiff, lightweight concrete primary and secondary beam joint according to claim 1, characterized in that: The rigid frame (2) is made of aluminum alloy, carbon fiber or basalt fiber.

5. A modular, stiffened, lightweight concrete primary and secondary beam joint according to claim 1, characterized in that: The connecting through holes (2-3) are made of PVC pipe, steel pipe, aluminum alloy pipe or carbon fiber pipe.

6. A modular, stiffened, lightweight concrete primary and secondary beam joint according to any one of claims 1-5, characterized in that: The horizontal lightweight stiffened chord (2-1) and the lightweight stiffened vertical bar (2-4) are welded or bolted together.

7. A modular, stiffened, lightweight concrete primary and secondary beam joint according to any one of claims 1-5, characterized in that: The length and thickness of the horizontal lightweight stiffened chord (2-1) in adjacent limbs are the same or different; the width and thickness of the different groups of lightweight stiffened vertical bars (2-4) in each limb are the same or different.

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