Fabricated frame beam-column joint with replaceable energy consumption connection

Abstract

The invention provides an assembly type frame beam-column joint with a replaceable energy dissipation connector, which comprises a frame column and a frame beam, a beam cantilever is transversely arranged on one side of the frame column in a protruding manner, and the beam cantilever is connected with one end of the frame beam through a web connecting plate and a high-strength bolt; and the energy dissipation connector is arranged between the beam cantilever and the frame beam and dissipates external energy through good axial hysteresis performance. Components are fully prefabricated, and rapid installation can be achieved on the construction site by means of the energy dissipation connectors and the web connecting plates through bolts. Damage after an earthquake can be rapidly replaced and repaired by replacing the energy consumption connectors, when the structure is disturbed or the earthquake occurs, the energy consumption connectors serve as the first energy consumption echelon to participate in energy consumption and enter the plastic yield stage firstly, and rapid repairing of the joint can be completed only by disassembling and replacing the dampers afterwards.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to an assembled frame beam-column node with replaceable energy-consuming connections. Background Art

[0002] The safety and reliability of building structures are important barriers to ensure personal safety and property safety. The beam-column connection nodes are an important part of the building structure, and their stress-bearing performance will directly affect the safety and reliability of the entire building structure.

[0003] While traditional bolted / welded steel frame beam-column joints are relatively mature, they are difficult or uneconomical to repair after disasters or damage. Welded beam-column joints have poor ductility, and the stress in the steel beam flange in the welded area exhibits a triaxial stress state, which is one of the causes of brittle fracture failure in welded joints. The proposed bolted-welded hybrid joint has better ductile rotational capacity than fully welded joints, but because the components involved in energy dissipation are beams or columns at the location of plastic hinges, they may be severely damaged when subjected to external disturbances or seismic input, making the building structure difficult or uneconomical to repair. This will have a serious adverse impact on social stability, normal production, and life.

[0004] Existing replaceable energy-absorbing connection beam-column nodes are relatively complex in structure and inconvenient to install, repair, and replace. Whether it is a steel frame beam-column node with a buckling restraint connector or a prefabricated concrete frame beam-column node with a REDC replaceable energy-absorbing connection, when it is assembled on site or damaged and needs to be repaired, disassembled, or replaced, the node area structure is relatively complex and difficult to install quickly, causing great inconvenience to construction efficiency. For steel frame beam-column nodes with buckling restraint connectors, the node core connector BRC requires a large number of bolts to be installed and connected, and it is relatively inconvenient to align the bolt holes and web connection plates before splicing. For prefabricated concrete frame beam-column nodes with REDC replaceable energy-absorbing connections, the node is a concrete beam-column connection connected by pre-embedded steel parts. The REDC energy-absorbing connection requires the end to be buried in the concrete. After the node is damaged, it is difficult to disassemble and install, and the feasibility of replacement is not high.

[0005] In view of this, the applicant filed this application after studying the existing technology. Summary of the Invention

[0006] The present invention provides an assembled frame beam-column node with replaceable energy-dissipating connections, aiming to improve at least one of the above-mentioned technical problems.

[0007] To address the aforementioned technical issues, the present invention provides a prefabricated frame beam-column node with replaceable energy-dissipating connections. The node comprises a frame column and a frame beam. A beam cantilever protrudes laterally from one side of the beam column and connects to one end of the frame beam. The node also includes multiple energy-dissipating connectors mounted between the beam cantilever and the frame beam. The connectors comprise a core energy-dissipating unit, a locking steel plate assembly, and a component sleeve, a restraining unit. The locking steel plate assembly is connected between the beam cantilever and the frame beam at both ends, and the component sleeve is mounted outside the locking steel plate assembly, ensuring that the core energy-dissipating unit yields and dissipates energy only in the direction of the locking steel plate connection. When the beam or column is disturbed and rotates relative to each other, the energy-dissipating connectors in the node region dissipate external energy through their excellent axial hysteresis properties.

[0008] As a further optimization, the frame beam ends are equipped with protruding beam end web connection plates; the beam cantilever ends are equipped with protruding cantilever end web connection plates. The beam end web connection plates and cantilever end web connection plates are connected by high-strength bolts. This strengthens the connection joint. This application is convenient for construction. The beam-column joint can be completed on-site by using two connecting parts and high-strength bolts.

[0009] As a further optimization, two web connecting plates are also included, and the two web connecting plates are symmetrically installed on both sides of the beam end web connecting plate and the cantilever end web connecting plate.

[0010] As a further optimization, a beam flange connection section is provided at the end of the frame beam; a cantilever flange connection section is provided at the end of the beam cantilever; and both ends of the lock-shaped steel plate group are respectively connected to the beam flange connection section and the cantilever flange connection section.

[0011] As a further optimization, there are two beam flange connection sections, which are symmetrically arranged on the upper and lower sides of the frame beam; there are two cantilever flange connection sections, which are symmetrically arranged on the upper and lower sides of the beam cantilever.

[0012] As a further optimization, the lock-shaped steel plate group is connected to the beam flange connecting section and the cantilever flange connecting section respectively through high-strength bolts.

[0013] As a further optimization, the lock-shaped steel plate group includes two lock-shaped steel plates symmetrically arranged in the component sleeve; energy dissipation rings are provided at adjacent ends of the two lock-shaped steel plates, and external energy is consumed by the yield deformation of the energy dissipation rings on the lock-shaped steel plates.

[0014] As a further optimization, the energy dissipation ring is arranged in a U shape.

[0015] As a further optimization, two limit blocks are protruding from the bottom end of the component sleeve, and the energy-dissipating ring is located in a limit groove formed between the two limit blocks.

[0016] As a further optimization, a gap is provided between the end of the limit block away from the energy dissipation ring and the lock-shaped steel plate.

[0017] By adopting the above technical solution, the present invention can achieve the following technical effects: The present application provides an assembled frame beam-column node with a replaceable energy-absorbing connection, including a frame column and a frame beam. A beam cantilever is provided on one side of the beam column, and the beam cantilever is connected to one end of the frame beam through a web connection plate and a high-strength bolt; and an energy-absorbing connector installed between the beam cantilever and the frame beam dissipates external energy through good axial hysteresis performance. The components in the present application are fully prefabricated and can be quickly installed at the construction site using bolts by relying on energy-absorbing connectors and web connection plates. Post-earthquake damage can be quickly replaced and repaired by replacing energy-absorbing connectors. When the structure is disturbed or subjected to an earthquake, the energy-absorbing connector participates in energy absorption as the first echelon of energy absorption and enters the plastic yield stage first. Afterwards, only the damper needs to be disassembled and replaced to complete the rapid repair of the node. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of an assembled frame beam-column node with replaceable energy-dissipating connections according to the present invention; Figure 2 It is an exploded schematic diagram of an assembled frame beam-column node with replaceable energy-dissipating connections according to the present invention; Figure 3 This is a schematic structural diagram of an energy dissipation connector according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of an energy dissipation connector according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the deformation of an energy dissipation ring when subjected to axial tension or compression according to one embodiment of the present invention; Figure 6 This is a schematic diagram of the force on the beam-column node of an assembled frame with replaceable energy-dissipating connections according to the present invention; Markings in the figure: 1. Frame column; 2. Frame beam; 3. Beam cantilever; 4. Beam flange connection section; 5. Cantilever flange connection section; 6. Energy dissipation connector; 7. Beam end web connection plate; 8. Cantilever end web connection plate; 9. Web connection plate; 10. Locking steel plate group; 11. Component sleeve plate; 12. Locking steel plate; 13. Energy dissipation ring; 14. Limit block; 15. Limit groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Depend on Figures 1 to 6 As shown, an embodiment of the present invention provides an assembled frame beam 2 column node with a replaceable energy-absorbing connection, comprising a prefabricated frame column 1 and a frame beam 2, a beam cantilever 3 protruding laterally on one side of the beam column, the frame beam 2 and the beam cantilever 3 are made of I-beam components, and two beam flange connection sections 4 and cantilever flange connection sections 5 are respectively provided on the upper and lower parts; wherein, preferably, it also includes a plurality of energy-absorbing connectors 6 installed and configured between the beam cantilever 3 and the frame beam 2, the input ends on both sides of the energy-absorbing connector 6 are respectively connected to the beam flange connection section 4 and the cantilever flange connection section 5 by high-strength bolts, and two energy-absorbing connectors 6 are symmetrically installed on the upper and lower sides, thereby connecting the frame column 1 and the frame beam 2 together as a connection node, which is convenient for installation and disassembly, so that after the building is subjected to vibration, it can be quickly inspected and the energy-absorbing connector 6 can be replaced to complete the repair of the node and put it back into use.

[0022] Preferably, a beam end web connection plate 7 is protruding from the end of the frame beam 2; a cantilever end web connection plate 8 is protruding from the end of the beam cantilever 3; the beam end web connection plate 7 and the cantilever end web connection plate 8 are connected by high-strength bolts. Furthermore, two web connection plates 9 are symmetrically arranged on both sides of the beam end web connection plate 7 and the cantilever end web connection plate 8, clamping the two in the middle. At this time, after being connected by high-strength bolts, the strength between the connection nodes will be higher, ensuring the stability of the connection nodes under normal conditions.

[0023] In one embodiment, the web connecting plate 9 is a dog-bone type.

[0024] Preferably, in the embodiment of the present application, the energy dissipation connector 6 is a metal damper, which can serve as a connection node and play the role of a connection support in normal state. Furthermore, the energy dissipation connector 6 includes a lock-shaped steel plate group 10 as a core energy dissipation unit and a component sleeve 11 as a constraint unit. The two sides of the lock-shaped steel plate group 10 are connected by high-strength bolts and arranged between the beam cantilever 3 and the frame beam 2, one side is connected to the beam flange connection section 4, and the other side is connected to the cantilever flange connection section 5; the component sleeve 11 is installed on the outside of the lock-shaped steel plate group 10 so that the core energy dissipation unit only yields and dissipates energy in the connection direction of the two ends of the lock-shaped steel plate 12. Preferably, in one embodiment, the lock-shaped steel plate group 10 includes two lock-shaped steel plates 12 symmetrically arranged in the component sleeve 11; energy dissipation rings 13 are provided at the adjacent ends of the two lock-shaped steel plates 12. The energy dissipation ring 13 is set in a U shape; the component sleeve 11 is formed by two upper and lower components fixed by high-strength bolts, wherein two limit blocks 14 are protruding from the bottom end of the component sleeve 11, and the energy dissipation ring 13 is located in the limit groove 15 formed between the two limit blocks 14. There is a gap between the end of the limit block 14 away from the energy dissipation ring 13 and the lock-shaped steel plate 12, so that if it is subjected to axial pressure, the two lock-shaped steel plates 12 squeeze the energy dissipation ring 13 inward and deform it until the two ends of the limit block 14 are offset, so that it will not continue to deform violently. Moreover, since the shock is a cycle of alternating stretching and extrusion, the huge deformation force will not destroy the structure at one time, so the energy dissipation ring 13 can stably consume energy in the back and forth deformation for many times, which is more durable. Figure 5 When the energy dissipation connector 6 is subjected to axial tension or compression, the ductility and plastic deformation of the two U-shaped energy dissipation rings 13 are used to dissipate external energy. The outer wall of the lock-shaped steel plate group 10 slides against the inner wall of the component sleeve 11, and the component sleeve 11 is used as a lateral support member to provide a constraint mechanism to constrain the internal energy dissipation unit to be compressed or stretched, resulting in overall buckling and constraining its local buckling. During axial compression, the two energy dissipation rings 13 squeeze each other and are subjected to greater pressure, causing them to yield and enter the plastic stage; since the middle end of the energy dissipation ring 13 is constrained and stuck by the limiting groove 15, when the energy dissipation ring 13 is subjected to axial tension, the limiting groove 15 can ensure that the energy dissipation ring 13 does not detach and can provide the energy dissipation ring 13 with a reaction force for deformation. Furthermore, since the top end of the arc of the energy dissipation ring 13 is clamped and restricted by the limit block 14 and the end of another energy dissipation ring 13, most of the force on the energy dissipation ring 13 during deformation is generated on two arc sections, so that the force-bearing ends on the arc are mostly transferred from the two ends close to the side walls of the component sleeve 11 to one end to the top end of the arc, shortening the force chord length without changing the curvature, so that the energy dissipation ring 13 requires a greater yield force when deforming, and consumes more energy when it is shocked.

[0025] As an embodiment, the energy dissipation ring 13 is in the shape of a 1 / 2 arc, so that the two ends of the arc are tangent to the inner wall of the component sleeve 11. In this way, when the energy dissipation ring 13 is deformed, part of the deformation force is not only generated at the connection end integrated with the lock-shaped steel plate 12, but also part of the force acts on the inner wall of the component sleeve 11, thereby avoiding the breakage of the connection end. The overall strength is higher and can withstand more external energy.

[0026] As an embodiment, high-strength bolts can pass through the interior of the energy dissipation ring 13 after the assembly sleeve 11 is installed, thereby limiting the deformation of the energy dissipation ring 13, thereby maintaining the integrity of the structure, avoiding instantaneous damage, and withstanding higher frequency building earthquakes.

[0027] Preferably, the force of the beam-column joint provided by the present application solution is clear, such as Figure 6 , where l c is the height of frame column 1, l1 is the length of cantilever arm, l b is the length of frame beam 2, l j is the length of the connection node, i.e., the energy dissipation connector 6, under normal conditions. Δzn is the change in the energy dissipation connector 6 when it is under compression or tension. When the frame column 1 and the frame beam 2 are disturbed and produce relative changes, the metal energy dissipation damper in the node area dissipates external energy by relying on its good axial hysteresis performance. Within the material limitation range, the greater the change, the greater the energy consumption.

[0028] The present application provides an assembled frame beam 2-column node with a replaceable energy-absorbing connection. By providing an energy-absorbing connector 6 that is easy to disassemble and install at the beam-column node, the node yields first and consumes earthquake energy under the action of small and medium earthquakes, thereby ensuring that the main structure is in an elastic state. After the earthquake, the structural performance can be completely restored by replacing the energy-absorbing connector 6. This helps to enhance the repairability of the structure while ensuring that the structural space is not affected, and can reduce repair time and costs. The end of the frame beam 2 and the end of the beam cantilever 3 are connected by reinforced bolts using a dog-bone belly connecting plate and a replaceable energy-absorbing connector 6. The force transmission is simple, the force is clear, and the installation is convenient.

[0029] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An assembled frame beam-column node with replaceable energy-dissipating connections, characterized in that: It includes a frame column and a frame beam, wherein a beam cantilever is laterally protruded from one side of the beam column, and the beam cantilever is connected to one end of the frame beam; it also includes a plurality of energy-absorbing connectors installed between the beam cantilever and the frame beam, and the energy-absorbing connector includes a lock-shaped steel plate group as a core energy-absorbing unit and a component sleeve as a constraint unit, the two ends of the lock-shaped steel plate group are connected and arranged between the beam cantilever and the frame beam, and the component sleeve is installed on the outside of the lock-shaped steel plate group, so that the core energy-absorbing unit only yields and consumes energy in the connection direction of the two ends of the lock-shaped steel plate.

2. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 1 is characterized in that The frame beam end is provided with a beam end web connecting plate protruding from the end portion; the beam cantilever end is provided with a cantilever end web connecting plate protruding from the end portion; the beam end web connecting plate and the cantilever end web connecting plate are connected by high-strength bolts.

3. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 2 is characterized in that , and also includes two web connecting plates, which are symmetrically installed on both sides of the beam end web connecting plate and the cantilever end web connecting plate.

4. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 1 is characterized in that The frame beam end is provided with a beam flange connecting section; the beam cantilever end is provided with a cantilever flange connecting section; the two ends of the lock-shaped steel plate group are respectively connected to the beam flange connecting section and the cantilever flange connecting section.

5. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 4 is characterized in that There are two beam flange connecting sections, which are symmetrically arranged on the upper and lower sides of the frame beam; there are two cantilever flange connecting sections, which are symmetrically arranged on the upper and lower sides of the beam cantilever.

6. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 5 is characterized in that The lock-shaped steel plate group is connected to the beam flange connecting section and the cantilever flange connecting section respectively through high-strength bolts.

7. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 1 is characterized in that The lock-shaped steel plate group includes two lock-shaped steel plates symmetrically arranged in the component sleeve; energy-absorbing rings are arranged at the adjacent ends of the two lock-shaped steel plates.

8. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 7 is characterized in that , the energy dissipation ring is set in a U shape.

9. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 7 is characterized in that Two limit blocks are protruding from the bottom end of the component sleeve, and the energy dissipation ring is located in the limit groove formed between the two limit blocks.

10. The assembled frame beam-column node with replaceable energy-dissipating connection according to claim 9 is characterized in that There is a gap between the end of the limit block away from the energy dissipation ring and the lock-shaped steel plate.

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