Modularized stiff lightweight concrete beam-column joint

Abstract

This invention relates to a modular, rigid, lightweight concrete beam-column joint, belonging to the field of high-performance prefabricated building structure technology. It includes lightweight concrete, a rigid frame, connecting holes, and a three-axis box-type component interior. The lightweight concrete and the rigid frame are cast together to form the three-axis box-type component. The horizontal cross-section of the beam-column joint is cross-shaped. The rigid frame consists of horizontal lightweight rigid chords and lightweight rigid vertical members in a "well" shape. Reinforcement zones are provided at the ends of the horizontal lightweight rigid chords, and the chords are connected to the upper and lower ends of the lightweight rigid vertical members inside the reinforcement zones. The horizontal lightweight rigid chords are located on the edges of each end of the beam-column joint along the beam axis. Connecting holes are vertically located at the internal corners of each leg of the beam-column joint for connecting to the upper and lower column members. Each leg is connected to the beam member through beam-to-beam connectors. This invention effectively solves the problem of steel bar collision during the construction of beam-column joints in prefabricated buildings.

Description

Technical Field

[0001] This invention relates to a beam-column joint, particularly a modular, rigid, lightweight concrete beam-column 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 construction machinery and a large number of specialized construction workers for construction and installation, which undoubtedly increases construction costs and slows down construction speed. Furthermore, existing prefabricated concrete structures are designed as permanent structures, without emphasizing the ease of demolition or the feasibility of reconfiguration to meet user needs. Therefore, for special scenarios such as training facilities and temporary buildings, they cannot meet the requirements for flexible disassembly and reconstruction, convenient assembly, and rapid construction without heavy machinery assistance.

[0004] Existing prefabricated building construction methods for beam-column joints all have various defects (for example, CN112922231A discloses a prefabricated concrete beam-column joint and its construction method, which includes: welding circumferential reinforcing plates to the inside of the stirrups, arranging longitudinal bars and tying stirrups to the longitudinal bars, and casting prefabricated upper and lower columns using formwork; hoisting the prefabricated upper column directly above the prefabricated lower column, and welding the stirrups connecting the upper and lower columns; welding cantilever plates to the outer sides of both the upper and lower columns; overlapping and connecting the cantilever plates to the longitudinal bars of the concrete beam; and casting concrete using formwork outside the cantilever plates). In existing prefabricated concrete structural systems, beam-column connections are often achieved through cast-in-place methods, i.e., rebars are pre-reserved at the column top and beam ends, installed on-site, formwork is erected, and then the connection is achieved by post-casting concrete. This approach still cannot avoid the drawback of the extremely complex reinforcement binding at beam-column joints in traditional cast-in-place structures. In addition, the beam-column joint components of prefabricated steel structures are heavy, requiring specialized equipment and professional workers to complete the installation and fastening. In prefabricated PC systems, pre-cast strips need to be reserved, and the reinforcement at beam-column joints is complex, making it easy for reinforcement collisions to occur during hoisting, which seriously affects the installation progress.

[0005] Therefore, it is necessary to invent a beam-column joint to achieve fast, convenient, and lightweight installation at the beam-column structural joints of prefabricated buildings. Summary of the Invention

[0006] To address the aforementioned deficiencies in the existing technology, this invention proposes a modular, rigid, lightweight concrete beam-column joint to solve the problem of steel bar collisions during the construction of beam-column joints in prefabricated buildings, which seriously affects the construction progress.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A modular, rigid, lightweight concrete beam-column joint mainly comprises lightweight concrete, a rigid frame, connecting holes, and a three-axis box-type component interior; the lightweight concrete and the rigid frame are cast together; the lightweight concrete is disposed at the end of the three-axis box-type component interior; the three-axis box-type component interior is disposed through the lightweight concrete, and is a cavity or lightweight filler; the beam-column joint is a three-axis box-type component with a cross-shaped horizontal cross section;

[0009] The horizontal lightweight stiffening chords in the stiffened frame are arranged in a "well" shape, with a reinforcement zone at each 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 multiple anchoring ends are provided on the horizontal lightweight stiffening chords.

[0010] The beam-column joint is connected to the beam member through a connecting through hole;

[0011] The connecting holes are vertically arranged at the inside corners of each limb of the beam-column joint and are used to connect with the column members set above and below; the upper and lower ends of the connecting holes are respectively fixed on the upper and lower sets of "well"-shaped horizontal lightweight stiff chords.

[0012] Furthermore, each set of horizontal lightweight stiffened chords consists of two horizontal lightweight stiffened chords of the same size.

[0013] Furthermore, the connecting hole is a pin connecting hole or a bolt connecting hole.

[0014] Furthermore, the lightweight concrete is foamed concrete or lightweight aggregate concrete.

[0015] Furthermore, the internal cross-section of the triaxial box-type component is rectangular or other shapes.

[0016] Furthermore, the beam-column joint is penetrated through the interior of the triaxial box-type component.

[0017] Furthermore, the rigid frame is made of aluminum alloy, carbon fiber, or basalt fiber.

[0018] Furthermore, the end reinforcement area on the horizontal lightweight stiff chord is formed by increasing the thickness of the outer end of the horizontal lightweight stiff chord, and the upper and lower ends of the lightweight stiff vertical bar are fixed together with the connecting through hole and the end reinforcement area; the connecting hole is a bolt connection hole, which is provided with a hand hole.

[0019] Furthermore, an end reinforcement is provided on the outer side of the horizontal lightweight stiff chord, and a connecting through hole penetrates the end reinforcement and the horizontal lightweight stiff chord; simultaneously, the upper and lower ends of the lightweight stiff vertical member are fixed to the end reinforcement and the horizontal lightweight stiff chord by bolts. The connecting through hole is located on the outer side of the lightweight stiff vertical member and is not connected to the lightweight stiff vertical member.

[0020] The modular, rigid, lightweight concrete beam-column joint proposed in this invention can achieve the following technical effects:

[0021] 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.

[0022] This invention adopts a modular and standardized design, with fewer similar component sizes and models in the structure. It advocates using a component-on-demand combination method to achieve diverse and flexible building configuration requirements. It uses lightweight and rigid materials to replace steel in traditional prefabricated composite structures and uses lightweight concrete to replace ordinary concrete in traditional prefabricated composite structures. These measures greatly reduce the weight of components. In addition, this invention optimizes the component connection method, reduces the number of connecting bolts between components, and innovatively adopts a socket connection for beam-column nodes, which greatly simplifies the complexity of the connection between component nodes and makes repeated disassembly and assembly of the structure possible.

[0023] The lightweight, rigid frame of this invention is exposed or shallowly embedded in the corners of the components. There are no other reinforcing frames inside the lightweight concrete, and the beam-column joints do not require complex rebar tying or on-site rebar tying, thus avoiding rebar collisions during the construction of existing prefabricated structures. Specific advantages include the following:

[0024] 1. Beam-column joints enable rapid connection of beams and columns while ensuring installation accuracy.

[0025] 2. The rigid frame mainly bears the load of resisting bending moment and torque.

[0026] 3. Lightweight concrete can resist vertical loads.

[0027] 4. The internal weight of the three-axis box-type component can be reduced compared to the overall weight of the beam-column joint component, making manual installation easier.

[0028] 5. Pin connection holes (or bolt connection holes) enable precise and efficient positioning and installation of beam-column joints and column components. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the first modular rigid lightweight concrete beam-column joint of the present invention;

[0030] Figure 2 This is a schematic diagram of the first modular rigid lightweight concrete beam-column joint rigid frame of the present invention;

[0031] Figure 3 This is the present invention. Figure 2 Schematic diagram of a medium-level lightweight stiffened chord;

[0032] Figure 4 This is a schematic diagram of the second type of modular rigid lightweight concrete beam-column joint of the present invention;

[0033] Figure 5 This is a schematic diagram of the second type of modular rigid lightweight concrete beam-column joint rigid frame of the present invention;

[0034] Figure 6 This is the present invention. Figure 5 Schematic diagram of a medium-level lightweight stiffened chord;

[0035] Figure 7 This is a schematic diagram of the second type of modular rigid lightweight concrete beam-column joint of the present invention, showing its connection to the column and the beam.

[0036] Figure 8 This is a schematic diagram of the interior of the second type of modular, rigid, lightweight concrete beam-column joint three-axis box-type component of the present invention. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 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.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment of a modular, rigid, lightweight concrete beam-column joint mainly includes lightweight concrete 1, a rigid frame 2, connecting holes 3, and a three-axis box-type component interior 4. The lightweight concrete 1 and the rigid frame 2 are cast together. A rectangular cross-section three-axis box-type component interior 4 is provided at the end of the lightweight concrete 1. The three-axis box-type component interior 4 is hollow and penetrates the lightweight concrete 1, passing through the beam-column joint. The beam-column joint is a three-axis box-type component with a cross-shaped horizontal cross-section. The beam-column joint is connected to the beam component through connecting holes 2-4.

[0040] like Figure 2-3As 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 2-6 inside the reinforcement zones. 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 multiple anchoring ends 2-7 are provided on the horizontal lightweight rigid chord members 2-1. In this embodiment, each group of horizontal lightweight rigid chord members 2-1 and lightweight rigid vertical members 2-6 is composed of two horizontal lightweight rigid chord members 2-1 and lightweight rigid vertical members 2-6 of the same size.

[0041] like Figure 1-2 As shown, connection holes 3 are vertically located at the internal corners of each member of the beam-column joint. These are bolt holes used to connect with the upper and lower column members. The upper and lower ends of connection holes 3 are fixed to the upper and lower sets of "well"-shaped horizontal lightweight stiffened chord members 2-1, respectively. Connection holes 3 are also fixed to the horizontal lightweight stiffened chord members 2-1 via connection plates 2-2.

[0042] In this embodiment, the lightweight concrete 1 is foamed concrete, and the rigid frame 12 is made of aluminum alloy.

[0043] like Figure 2-3 As shown, the end reinforcement area on the horizontal lightweight stiff chord 2-1 is formed by increasing the thickness of the outer end of the horizontal lightweight stiff chord 2-1. The upper and lower ends of the lightweight stiff vertical bar 2-6 are fixed together with the connecting through hole 2-4 and the end reinforcement area. The connecting hole 3 is a bolt connection hole, and a hand hole 5 is provided on it.

[0044] Example 2

[0045] like Figure 4-6 As shown, in the second type of modular rigid lightweight concrete beam-column joint of this embodiment, an end reinforcement 2-3 is also provided on the outside of the horizontal lightweight rigid chord 2-1, and a connecting through hole 2-4 penetrates the end reinforcement and the horizontal lightweight rigid chord 2-1. Meanwhile, the upper and lower ends of the lightweight rigid vertical member 2-6 are fixed to the end reinforcement 2-3 and the horizontal lightweight rigid chord 2-1 by bolts. The connecting through hole 2-4 is located on the outside of the lightweight rigid vertical member 2-6 and is not connected to the lightweight rigid vertical member 2-6. Furthermore, as... Figure 7 As shown, in this embodiment, connection hole 3 is a pin connection hole, used for pin connection with the upper and lower column components. Other components and connection methods are the same as in embodiment 1, and will not be described in detail here.

[0046] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the structure of the present invention. The arrangement and quantity of the present invention are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of the present invention, without departing from the scope of the present invention, are still within the scope of the present invention.

Claims

1. A modular, rigid, lightweight concrete beam-column joint, characterized in that: It mainly includes lightweight concrete (1), rigid frame (2), connecting holes (3), and the interior (4) of a three-axis box-type component; the lightweight concrete (1) and the rigid frame (2) are poured together; the interior (4) of the three-axis box-type component is provided at the end of the lightweight concrete (1); the interior (4) of the three-axis box-type component is provided through the lightweight concrete (1) and is a cavity or lightweight filler; the beam-column joint is a three-axis box-type component with a cross-shaped horizontal section; 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 (2-6) 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 multiple anchoring ends (2-7) are set on the horizontal lightweight stiffening chords (2-1). The beam-column joint is connected to the beam member through the connecting through hole (2-4); The connecting hole (3) is vertically set at the inside corner of each leg of the beam-column node, and is used to connect with the column members set above and below; the upper and lower ends of the connecting hole (3) are respectively fixed on the upper and lower sets of "well" shaped horizontal lightweight stiff chords (2-1); The end reinforcement area on the horizontal lightweight stiff chord (2-1) is formed by increasing the thickness of the outer end of the horizontal lightweight stiff chord (2-1). The upper and lower ends of the lightweight stiff vertical rod (2-6) are fixed together with the connecting through hole (2-4) and the end reinforcement area. The connecting hole (3) is a bolt connection hole with a hand hole. An end reinforcement is also provided on the outside of the horizontal lightweight stiff chord (2-1). The connecting through hole (2-4) passes through the end reinforcement and the horizontal lightweight stiff chord (2-1). At the same time, the upper and lower ends of the lightweight stiff vertical rod (2-6) are fixed to the end reinforcement and the horizontal lightweight stiff chord (2-1) by bolts. The connecting through hole (2-4) is located on the outside of the lightweight stiff vertical rod (2-6) and is not connected to the lightweight stiff vertical rod (2-6).

2. The modular, stiff, lightweight concrete beam-column joint according to claim 1, characterized in that: Each set of horizontal lightweight stiffened chords (2-1) and lightweight stiffened vertical members (2-6) consists of two horizontal lightweight stiffened chords (2-1) and lightweight stiffened vertical members (2-6) of the same size.

3. The modular, stiff, lightweight concrete beam-column joint according to claim 1, characterized in that: The connecting hole (3) is a pin connecting hole or a bolt connecting hole.

4. A modular, stiff, lightweight concrete beam-column joint according to claim 1, characterized in that: The lightweight concrete (1) is foamed concrete or lightweight aggregate concrete.

5. A modular, stiff, lightweight concrete beam-column joint according to claim 1, characterized in that: The cross-section inside the triaxial box-type component (4) is rectangular or other shapes.

6. A modular, stiff, lightweight concrete beam-column joint according to claim 5, characterized in that: The interior (4) of the three-axis box-type component penetrates the beam-column joint.

7. A modular, stiff, lightweight concrete beam-column joint according to claim 1, characterized in that: The rigid frame (2) is made of aluminum alloy, carbon fiber or basalt fiber.

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