Replaceable node connector with energy consumption device and concrete beam column structure using connector

Abstract

The invention discloses a replaceable node connector with an energy consumption device and a concrete beam column structure using the connector. According to the energy dissipation device, a multi-stage energy dissipation mechanism is adopted, so that the structure has high ductility, earthquake energy can be effectively dissipated, it is guaranteed that main stress components are not damaged, meanwhile, replacement operation is convenient, and the structure function can be rapidly recovered after an earthquake. And after problems occur, replacement can be conveniently completed, and the building safety is improved. After being prefabricated in a factory, the frame beams and the casing columns are spliced with the connectors through bolts on site, dry type connection is completely adopted, on-site secondary pouring or welding is avoided, the engineering quality can be strictly controlled, beam column connection construction is facilitated, and the construction period can be effectively shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and more specifically, to a replaceable node connector with an energy dissipation device and a concrete beam-column structure using the connector. Background Art

[0002] The beam-column joint is the key part of the concrete beam-column and concrete column-column connection in the high-rise reinforced concrete frame structure. The quality of its design is not only related to whether the excellent seismic performance of the reinforced concrete structure can be fully exerted, but also directly affects the cost of the structure. The existing beam-column joint connection device is generally composed of the following parts: precast reinforced concrete beams, precast reinforced concrete columns, prestressed steel bars, and metal connectors. Concrete beam grooves are set on both sides of the beam. A protrusion is set on the outside of the metal connector, and the protrusion is embedded in the concrete beam groove. One end of the metal connector is fixedly connected to the precast reinforced concrete column, and the other end is connected to the side of the concrete beam. The prestressed tendons run through the beam and column and are anchored on the outside of the column.

[0003] However, the existing prefabricated beam-column joints are prone to stress concentration at the upper and lower cross-section joints, which can cause local damage to the concrete, and may cause prestress loss during long-term use, reducing the integrity of the joint. In addition, prefabricated beam-column joints require prestressing during construction, which involves many processes.

[0004] Moreover, the beams and columns are not removable and replaceable. After a strong earthquake, when the beams and columns are severely damaged, the restorable functional structure has already failed. Only the connection between beams and columns is proposed, but the connection between the upper and lower columns is not solved. Summary of the invention

[0005] The present invention overcomes the deficiencies of the prior art prefabricated beam-column nodes in construction and replaceability, and provides a replaceable node connector with an energy dissipation device and a concrete beam-column structure using the connector, in the hope of solving the problems existing in the prior art.

[0006] In order to solve the above technical problems, one aspect of the present invention provides a replaceable node connector with an energy dissipation device:

[0007] A replaceable node connector with an energy dissipation device, comprising: a connecting end plate, a high-strength steel rod, and an energy dissipation device;

[0008] The connecting end plates are provided with connecting components, and high-strength steel bars and energy dissipation devices are provided between the connecting end plates;

[0009] The energy dissipation device comprises an energy dissipation connecting rod, both ends of which are connected to the connecting end plate, and the energy dissipation connecting rod is inclined to the connecting end plate.

[0010] In the event of vibrations such as earthquakes, relative displacements will occur between the beams and columns installed on the node connectors. At this time, the energy dissipation device is stressed, and the energy dissipation connecting rod dissipates energy through buckling energy dissipation. Moreover, this device can be pre-assembled as a whole and is relatively simple to install.

[0011] A further technical solution is that the energy dissipation device includes at least two energy dissipation connecting rods, which are rotatably connected between the energy dissipation connecting rods, and the contact surfaces between the energy dissipation connecting rods are friction surfaces.

[0012] When vibrations occur, relative movements will occur between the energy dissipation connecting rods, and sliding friction will occur on the contact surfaces between the connecting rods, dissipating the energy of earthquakes or vibrations through the sliding friction between them.

[0013] A further technical solution is that the energy dissipation device includes two energy dissipation connecting rods, and the two energy dissipation connecting rods are arranged in an X shape between the connecting end plates;

[0014] Both ends of the energy dissipation connecting rod are connected to both ends of the high-strength steel rod.

[0015] The two energy dissipation connecting rods arranged in an X shape can rotate and deform more conveniently during various deformations to generate friction.

[0016] A further technical solution is that the energy dissipation connecting rod includes a fixed connection part and a movable connecting rod;

[0017] The fixed connection part is fixed on the connecting end plate, and the movable connecting rod is hinged between the fixed connection parts.

[0018] The movable connecting rod fixed by hinge has a higher degree of freedom and is more likely to generate rotational deformation and friction.

[0019] A further technical solution is that the energy dissipation device further includes a friction hinge;

[0020] A connection hole is provided in the middle of the energy dissipation connecting rod, and the friction hinge passes through the connection hole to rotatably connect the energy dissipation connecting rods;

[0021] The contact surface between the friction hinge and the connection hole of the connecting rod is a friction surface.

[0022] A further technical solution is that two spring limit blocks are provided at the limit deformation positions of the friction hinge;

[0023] A limit hole is provided on the connection hole of the energy dissipation connecting rod.

[0024] By setting the spring limit block and the limit hole, it is possible to avoid large deformations at the node caused by the large rotation amplitude of the X-shaped buckling energy dissipation member; when the energy dissipation connecting rod rotates around the friction hinge to the limit position, the limit hole rotates to the limit block, and the limit block pops out and inserts into the limit hole. After the front and rear energy dissipation connecting rods both stop rotating relative to the friction hinge, the energy dissipation connecting rod no longer rotates, and the node connector dissipates energy in the second stage through its own strength, realizing multi-stage energy dissipation.

[0025] The present invention also provides a concrete beam-column structure;

[0026] A concrete beam-column structure, comprising the node connector, precast column, and precast beam as described above;

[0027] Connecting members matching the connecting components of the connecting end plate are provided on the precast column and the precast beam.

[0028] As a further technical solution, the connecting component of the connecting end plate is a connecting screw hole;

[0029] The connecting member on the precast column is a precast steel sleeve, and connecting screw holes are provided on the precast steel sleeve; the precast column further includes vertical steel bars inside the column;

[0030] The vertical steel bars inside the column are vertically arranged in the precast column, and the vertical steel bars inside the column are welded and fixed to the steel sleeve;

[0031] The connecting member on the precast beam is an embedded threaded sleeve, and the embedded threaded sleeve is arranged at the end face of the precast beam.

[0032] By connecting the precast column and the precast concrete beam with high-strength bolts, the connection between the beam and the column and the effective transfer of tension or pressure are realized. Moreover, when the movable connecting rod can be replaced, the post-earthquake function of the structure can be restored; at the same time, the precast steel sleeve strengthens the concrete at the column end, effectively preventing damage such as crushing and cracking.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects: The energy dissipation device in the present invention adopts a multi-stage energy dissipation mechanism, making the structure have high ductility, capable of effectively dissipating seismic energy, ensuring that the main load-bearing members are not damaged, and at the same time, the replacement operation is convenient, and the structure function can be quickly restored after an earthquake. It can also be replaced relatively conveniently after problems occur, improving the building safety. The frame beam and the column with sleeve of the present invention are prefabricated in the factory and assembled with the connector by bolts on site, completely adopting dry connection, avoiding on-site secondary pouring or welding, being able to strictly control the project quality, facilitating the connection construction of the beam and the column, and effectively shortening the construction period. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the structure of the node connector;

[0035] Figure 2 It is a schematic diagram of the structure of the movable connecting rod;

[0036] Figure 3 It is a schematic diagram of the structure of the friction hinge;

[0037] Figure 4 It is a partial schematic diagram of the installation structure of the movable connecting rod and the friction hinge;

[0038] Figure 5 It is a partial schematic diagram of the concrete beam-column structure;

[0039] Figure 6 It is a schematic diagram of the precast column structure;

[0040] Figure 7 It is a partial schematic diagram of the end face structure of the precast beam;

[0041] Figure 8 It is a partial schematic diagram of the structure of the precast steel casing and the vertical steel bars in the column.

[0042] In the figure, 1 - connecting end plate, 2 - high-strength steel bar, 3 - energy dissipation device, 31 - energy dissipation connecting rod, 32 - fixed connection part, 33 - movable connecting rod, 331 - limiting hole, 4 - friction hinge, 41 - spring limit block, 5 - precast column, 51 - precast steel casing, 52 - vertical steel bars in the column, 6 - precast beam, 61 - embedded threaded sleeve. Specific embodiments

[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further elaborates on the present invention in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Embodiment 1

[0045] A replaceable node connector with an energy dissipation device, see Figure 1 , including: a connecting end plate 1, a high-strength steel bar 2, and an energy dissipation device 3;

[0046] A connecting component is provided on the connecting end plate 1, and a high-strength steel bar 2 and an energy dissipation device 3 are provided between the connecting end plates 1;

[0047] The energy dissipation device 3 includes an energy dissipation connecting rod 31, and both ends of the energy dissipation connecting rod 31 are connected to the connecting end plate, and the energy dissipation connecting rod 31 is inclined to the connecting end plate.

[0048] Further preferably, the energy dissipation device 3 includes 2 energy dissipation connecting rods 31 and a friction hinge 4, see Figure 2 , Figure 3, both ends of the energy-consuming connecting rod 31 are connected to the connecting end plate 1. The energy-consuming connecting rod 31 is inclined to the connecting end plate 1. The energy-consuming connecting rods 31 are rotatably connected to each other, and the contact surface between the energy-consuming connecting rod 31 and the friction hinge 4 is a friction surface.

[0049] It should be noted that the rotatable connection of the energy-consuming connecting rod 31 can adopt a connection method in which one or more connecting rods are provided with mounting holes, and the other cooperating connecting rod is provided with a cooperating inserting rod. It can also adopt a connection method in which two or more connecting rods are provided with mounting holes, and then the friction hinge 4 is used to rotatably connect the two or more connecting rods.

[0050] In this embodiment, 4 high-strength steel bars 2 are arranged in two groups between the connecting end plates 1. Among them, every 2 high-strength steel bars 2 are installed in cooperation with the energy-consuming device 3. Specifically, the energy-consuming device 3 includes 2 energy-consuming connecting rods 31, and the 2 energy-consuming connecting rods 31 are arranged in an X shape between the connecting end plates 1;

[0051] The energy-consuming connecting rod 31 includes a fixed connection part 32 and a movable connecting rod 33;

[0052] The fixed connection part 32 is fixedly welded to the connecting end plate 1. The fixed connection part 32 is welded to both ends of the high-strength steel bar 2, and the movable connecting rod 33 is hinged between the fixed connection parts 32.

[0053] A connection hole is provided in the middle of the energy-consuming connecting rod 31, and the friction hinge 4 passes through the connection hole to rotatably connect the energy-consuming connecting rod 31;

[0054] The contact surface between the friction hinge 4 and the connection hole of the connecting rod is a friction surface.

[0055] Two spring limit blocks 41 are provided at the limit deformation position of the friction hinge 4, and a limit hole 331 is provided in the connection hole of the energy-consuming connecting rod 31.

[0056] See Figure 4 , because in this embodiment, the energy-consuming device 3 is composed of two energy-consuming connecting rods 31 and a friction hinge 4. When there is movement, the movement will be converted into the relative rotation of the two energy-consuming connecting rods 31. Since the rotation direction of the energy-consuming connecting rod 31 cannot be predicted in advance, limit holes 331 are provided in both rotation directions of the energy-consuming connecting rod 31. No matter which direction the energy-consuming connecting rod 31 rotates, as long as it exceeds the limited angle, the spring limit block 41 will snap into the limit hole 331 to achieve limiting.

[0057] During use, under minor earthquakes, the beam and column at the joint will produce relative displacement under the action of seismic waves. At this time, the energy-dissipating connecting rod 31 will rotate around the middle friction hinge 4 under the action of force. The energy-dissipating connecting rod 31 rotates and slides against the friction plate on the surface of the friction hinge 4, dissipating seismic energy through the sliding friction between them. At the same time, the limit hole 331 on the energy-dissipating connecting rod 31 and the spring limit block 41 on the friction hinge 4 can limit and fix the rotation amplitude in the case of a large rotation amplitude, avoiding the situation of large deformation at the joint due to the large rotation amplitude of the energy-dissipating connecting rod 31.

[0058] When the relative rotation of the two energy-dissipating connecting rods 31 exceeds the limit angle, the limit hole 331 rotates to the position of the limit block, and the limit block pops out and inserts into the limit hole 331. When the two energy-dissipating connecting rods 31 are both fixed by the friction hinge 4, the relative rotation of the energy-dissipating connecting rods 31 stops.

[0059] The stop of rotation means that the vibration amplitude is large. Under the action of large earthquake seismic waves, large lateral displacement will occur at the joint, and the relative deformation at the beam-column joint is large. At this time, the energy-dissipating connecting rod 31 cannot continue to rotate and dissipate energy through friction at the friction hinge 4, resulting in plastic deformation and even yielding of the energy-dissipating device 3 itself under the action of a large force, and dissipating energy in the second stage through its own strength.

[0060] Embodiment 2

[0061] A concrete beam-column structure, see Figure 5 , including the node connector, precast column 5, and precast beam 6 as described above;

[0062] The precast column 5 and precast beam 6 are provided with connecting members that cooperate with the connecting members of the connecting end plate 1.

[0063] In this embodiment, the connecting member of the connecting end plate 1 is a connecting screw hole;

[0064] See Figure 6 , the connecting member on the precast column 5 is a precast steel sleeve 51, and the precast steel sleeve 51 is provided with a connecting screw hole;

[0065] See Figure 8 , the precast column 5 further includes vertical steel bars 52 inside the column;

[0066] The vertical steel bars 52 inside the column are vertically arranged in the precast column 5, and the vertical steel bars 52 inside the column are welded and fixed to the steel sleeve.

[0067] See Figure 7 , the connecting member on the precast beam 6 is an embedded threaded sleeve 61, and the embedded threaded sleeve 61 is arranged at the end face of the precast beam 6.

[0068] During fabrication, precast steel sleeves 51 are provided at both ends of the precast column 5. The precast steel sleeves 51 are welded to the vertical steel bars 52 inside the column. After welding, casting is carried out to obtain a precast concrete column with steel sleeves at the column ends.

[0069] During installation, the upper and lower columns-column, column-beam are directly connected through a node connector. Specifically, the connecting screw holes of the precast steel sleeve 51 and the connecting end plate 1 are fixed using bolts.

[0070] The connecting screw holes of the beam-end embedded threaded sleeve 61 on the precast beam 6 and the connecting end plate 1 are fixed using bolts.

[0071] If damage or wear has occurred after vibration, replacement is required. The bolts connecting the energy-dissipating connecting rod 31 and the fixed connecting part 32 in the energy-dissipating connecting device can be loosened to replace the energy-dissipating connecting rod 31, so as to achieve the purpose of quickly restoring the use function of the structure after an earthquake.

[0072] Although the present invention has been described herein with reference to illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of the disclosure of this application, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A replaceable node connector with an energy dissipation device, characterized in that: include: Connect end plates, high-strength steel bars, and energy dissipation devices; The connecting end plates are provided with connecting components, and high-strength steel bars and energy dissipation devices are provided between the connecting end plates; The energy dissipation device comprises an energy dissipation connecting rod, both ends of which are connected to the connecting end plate, and the energy dissipation connecting rod is inclined to the connecting end plate.

2. A replaceable node connector with an energy dissipation device as claimed in claim 1, characterized in that: The energy dissipation device comprises at least two energy dissipation connecting rods, which are rotatably connected to each other, and the contact surface between the energy dissipation connecting rods is a friction surface.

3. A replaceable node connector with an energy dissipation device as claimed in claim 1, characterized in that: The energy dissipation device comprises two energy dissipation connecting rods, which are arranged in an X shape between the connecting end plates; The two ends of the energy-absorbing connecting rod are connected to the two ends of the high-strength steel rod.

4. A replaceable node connector with an energy dissipation device as claimed in claim 1, characterized in that: The energy-dissipating connecting rod comprises a fixed connecting portion and a movable connecting rod; The fixed connection parts are fixed on the connection end plates, and the movable connection rods are hinged between the fixed connection parts.

5. A replaceable node connector with an energy dissipation device as claimed in claim 3 or 4, characterized in that: The energy dissipation device also includes a friction hinge; A connection hole is provided in the middle of the energy-absorbing connecting rod, and a friction hinge passes through the connection hole to rotatably connect the energy-absorbing connecting rod; The contact surface between the friction hinge and the connecting hole of the connecting rod is a friction surface.

6. A replaceable node connector with an energy dissipation device as claimed in claim 5, characterized in that: Two spring limit blocks are arranged at the limit deformation position of the friction hinge; A limiting hole is arranged on the connecting hole of the energy-absorbing connecting rod.

7. A concrete beam-column structure, characterized in that: It comprises the node connector, prefabricated column and prefabricated beam as described in any one of claims 1 to 6; The prefabricated columns and prefabricated beams are provided with connecting pieces that cooperate with the connecting parts connecting the end plates.

8. A concrete beam-column structure as claimed in claim 7, characterized in that: The connecting parts connecting the end plates are connecting screw holes; The connecting piece on the prefabricated column is a prefabricated steel sleeve, and the prefabricated steel sleeve is provided with a connecting screw hole; the prefabricated column also includes vertical steel bars in the column; The vertical steel bars in the column are vertically arranged in the prefabricated column, and the vertical steel bars in the column are welded and fixed to the steel casing; The connecting piece on the prefabricated beam is a pre-embedded threaded sleeve, and the pre-embedded threaded sleeve is arranged on the end face of the prefabricated beam.

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