A wave - generating and grading energy - dissipating beam - column joint connection device and connection method

Abstract

The present invention discloses a wave - rising and grading energy - dissipating beam - column joint connection device and a connection method. The device is connected between a reinforced concrete precast column and a reinforced concrete precast beam. The reinforced concrete precast column is provided with a first shear - resistant steel plate and a number of precast column reserved steel bars, and the reinforced concrete precast beam is provided with a second shear - resistant steel plate and a number of precast beam reserved steel bars. The first shear - resistant steel plate and the second shear - resistant steel plate are arranged opposite to each other. The wave - rising and grading energy - dissipating beam - column joint connection device includes a connection steel plate, a first wave - rising longitudinal steel bar, a second wave - rising longitudinal steel bar, a first low - strength steel bar, a second low - strength steel bar and stirrups. The two connection steel plates are respectively arranged on both sides of the first shear - resistant steel plate and the second shear - resistant steel plate, and the connection steel plates are fixedly connected to the first shear - resistant steel plate and the second shear - resistant steel plate through pin bolts. The present invention has high construction efficiency, can achieve the "strong column - weak beam" yield mechanism, can dissipate energy in stages, has excellent anti - progressive collapse performance, and can be repaired after an earthquake.

Description

Technical Field

[0001] The present invention relates to a wave - generating and grading energy - dissipating beam - column joint connection device and a connection method, belonging to the technical field of building structures. Background Art

[0002] In building structures, the frame structure, as one of the basic structural forms, is widely used due to its flexible layout. Under seismic action, in a reinforced concrete frame structure, a "strong - beam - weak - column" yielding mechanism may occur, that is, plastic hinges first appear at the column ends and column feet, leading to the collapse of the structure, causing huge economic losses and casualties. Artificial plastic hinges are one type of method to solve the "strong - beam - weak - column" problem of the frame structure.

[0003] The wave - generating steel bar is a plastic hinge transfer method proposed in recent years. This method weakens the cross - section bearing capacity through the wave - generating of the longitudinal bars at the beam end to achieve the purpose of plastic hinge transfer. However, the application of wave - generating steel bars also has deficiencies. Its bearing capacity in the initial stage is low and it is difficult to meet the requirements of "no damage in minor earthquakes" in structural earthquake resistance and the requirements for crack width in the normal service limit state; shear failure is likely to occur at the cross - section - weakened part of the beam member; the current research results on wave - generating steel bars do not meet the requirement of "repairable in moderate earthquakes" in the seismic fortification requirements, and the energy - dissipating characteristics of wave - generating steel bars under different earthquake intensities are not effectively utilized.

[0004] Prefabricated assembly is a construction method with advantages such as green environmental protection, high efficiency, and automatic mechanization. This is also one of the reasons why the country vigorously promotes the application of prefabricated buildings. Currently, the prefabricated assembly method is often used in frame structures to realize the connection of beam - column joints. However, compared with traditional cast - in - place structures, the seismic performance of prefabricated structures is poor, and it is difficult to concentrate damage on non - critical prefabricated components for post - earthquake repair.

[0005] In the case of disasters such as strong earthquakes, explosions, and fires, the structure may be severely damaged due to local components, and the damage of related components may be rapidly caused in a short time, leading to the progressive collapse of the structure. Once the structure collapses, it will have an extremely adverse impact on the economy, society, and life safety. Therefore, how to improve the anti - progressive collapse performance of the structure is crucial.

[0006] Therefore, it has become an urgent problem to develop a node connection device with high construction efficiency, capable of realizing the "strong - column - weak - beam" yielding mechanism, energy - dissipating in stages, excellent anti - progressive collapse performance, and post - earthquake reparability. Summary of the Invention

[0007] To solve the above problems, the present invention provides a node connection device and a connection method with high construction efficiency, capable of realizing the "strong - column - weak - beam" yielding mechanism, energy - dissipating in stages, excellent anti - progressive collapse performance, and post - earthquake reparability to achieve the node connection between precast reinforced concrete beams and columns.

[0008] The first object of the present invention is to provide a wave - generating and grading energy - dissipating beam - column joint connecting device, which is connected between a precast reinforced concrete column and a precast reinforced concrete beam. The precast reinforced concrete column is provided with a first shear - resistant steel plate and a number of pre - reserved steel bars of the precast column. The precast reinforced concrete beam is provided with a second shear - resistant steel plate and a number of pre - reserved steel bars of the precast beam. The first shear - resistant steel plate and the second shear - resistant steel plate are arranged opposite to each other. The wave - generating and grading energy - dissipating beam - column joint connecting device includes connecting steel plates, a first wave - generating longitudinal bar, a second wave - generating longitudinal bar, a first low - strength steel bar, a second low - strength steel bar and stirrups. The two connecting steel plates are respectively arranged on both sides of the first shear - resistant steel plate and the second shear - resistant steel plate, and the connecting steel plates are fixedly connected to the first shear - resistant steel plate and the second shear - resistant steel plate through pin bolts. The second wave - generating longitudinal bar and the first wave - generating longitudinal bar are respectively located on the upper and lower sides of the connecting steel plates. One ends of a number of the second wave - generating longitudinal bars and a number of the first wave - generating longitudinal bars are butt - jointed with a number of the pre - reserved steel bars of the precast column through first grouting sleeves one by one, and the other ends are butt - jointed with a number of the pre - reserved steel bars of the precast beam through second grouting sleeves one by one. The second low - strength steel bar and the first low - strength steel bar are respectively fixedly connected to the second wave - generating longitudinal bar and the first wave - generating longitudinal bar, and a number of the second low - strength steel bars and the first low - strength steel bars are fixedly connected through stirrups.

[0009] In an embodiment of the present invention, the first shear - resistant steel plate is provided with a reserved round hole, the second shear - resistant steel plate is provided with a reserved waist - shaped hole, the connecting steel plate is provided with a reserved round hole and a reserved waist - shaped hole. The reserved round hole of the connecting steel plate corresponds to the reserved round hole of the first shear - resistant steel plate and is penetrated by a first pin bolt. A first gasket is sleeved on the first pin bolt, and the two first gaskets are respectively abutted against the two connecting steel plates to fixedly connect the two connecting steel plates to the first shear - resistant steel plate. The reserved waist - shaped hole of the connecting steel plate corresponds to the reserved waist - shaped hole of the second shear - resistant steel plate and is penetrated by a second pin bolt. A second gasket is sleeved on the second pin bolt, and the two second gaskets are respectively abutted against the two connecting steel plates to fixedly connect the two connecting steel plates to the second shear - resistant steel plate.

[0010] In an embodiment of the present invention, a number of the pre - reserved steel bars of the precast column are located on the upper and lower sides of the first shear - resistant steel plate, and a number of the pre - reserved steel bars of the precast beam are located on the upper and lower sides of the second shear - resistant steel plate and correspond to a number of the pre - reserved steel bars of the precast column one by one.

[0011] In an embodiment of the present invention, both the first wave - generating longitudinal bar and the second wave - generating longitudinal bar are provided with wave - generating positions recessed towards the connecting steel plate. The two sides of the wave - generating position of the first wave - generating longitudinal bar are fixedly connected through a first low - strength steel bar, and the two sides of the wave - generating position of the second wave - generating longitudinal bar are fixedly connected through a second low - strength steel bar.

[0012] In an embodiment of the present invention, both the first grouting sleeve and the second grouting sleeve are provided with grouting holes, and grouting is carried out into the first grouting sleeve and the second grouting sleeve through the grouting holes, so as to fixedly connect the first corrugated longitudinal reinforcement, the second corrugated longitudinal reinforcement with the reserved reinforcement of the precast column and the reserved reinforcement of the precast beam.

[0013] In an embodiment of the present invention, the first dowel is located in the middle of the upper and lower ends of the corrugated position of the first corrugated longitudinal reinforcement near one end of the reinforced concrete precast column and the corrugated position of the second corrugated longitudinal reinforcement near one end of the reinforced concrete precast column; the second dowel is located in the middle of the upper and lower ends of the corrugated position of the first corrugated longitudinal reinforcement near one end of the reinforced concrete precast beam and the corrugated position of the second corrugated longitudinal reinforcement near one end of the reinforced concrete precast beam.

[0014] In an embodiment of the present invention, the distance between the second corrugated longitudinal reinforcement and the reinforced concrete precast column is less than the distance between the first corrugated longitudinal reinforcement and the reinforced concrete precast column.

[0015] In an embodiment of the present invention, the first corrugated longitudinal reinforcement and the second corrugated longitudinal reinforcement do not contact the connecting steel plate, and concrete is poured at the corrugated graded energy-dissipating beam-column joint connecting device; shear-resistant steel plates are embedded in both the reinforced concrete precast column and the reinforced concrete precast beam.

[0016] The second object of the present invention is to provide a corrugated graded energy-dissipating beam-column joint connection method, which applies the corrugated graded energy-dissipating beam-column joint connection device, and the method includes the following steps:

[0017] Step 1: Embed the first shear-resistant steel plate into the reinforced concrete precast column, and embed the second shear-resistant steel plate into the reinforced concrete precast beam;

[0018] Step 2: Connect the first corrugated longitudinal reinforcement and the second corrugated longitudinal reinforcement to the reserved reinforcement of the precast column through the first grouting sleeve; connect the first corrugated longitudinal reinforcement and the second corrugated longitudinal reinforcement to the reserved reinforcement of the precast beam through the second grouting sleeve;

[0019] Step 3: After the corrugated graded energy-dissipating beam-column joint connection device is respectively connected to the reinforced concrete precast column and the reinforced concrete precast beam, concrete is cast in place at the corrugated graded energy-dissipating beam-column joint connection device.

[0020] In an embodiment of the present invention, the concrete at the splicing position of the reinforced concrete precast column extends outside the side wall of the reinforced concrete precast column.

[0021] Beneficial effects

[0022] (1) Components of the wave - generating and energy - dissipating beam - column joint connection device of the present invention, reinforced concrete precast columns, and reinforced concrete precast beams can all be prefabricated in the factory and then transported to the site for splicing by construction workers. Therefore, when the present invention is applied to prefabricated assembled structures, it has the advantages of being green, environmentally friendly, efficient, automated, and mechanized.

[0023] (2) The present invention combines the wave - generating steel bar structure with welded low - strength steel bars and the pin - bolt hinged structure, thereby weakening the flexural bearing capacity at the beam end. Therefore, the plastic hinge can be transferred to the beam end displacement, and the yield mechanism of "strong columns and weak beams" can be achieved. At the same time, under small earthquake actions and normal service conditions, the welded low - strength steel bars make up for the flexural bearing capacity required in the initial stage; the shear - resistant steel plates and closely - spaced stirrups in the device fully solve the defect of insufficient shear - resistant bearing capacity at the wave - generating part.

[0024] (3) Under earthquake actions, the beam - column joint connection designed in the present invention can dissipate energy in stages. In the first stage, the low - strength welded steel bars at the upper and lower ends near the column end are disconnected, the wave - generating steel bars at the upper and lower ends near the column end start to deform and dissipate energy, and the pin - bolt connections near the column end start to rotate and dissipate energy in cooperation with them; in the second stage, the low - strength welded steel bars at the upper and lower ends far from the column end are disconnected, the wave - generating steel bars at the upper and lower ends far from the column end start to deform and dissipate energy, and the pin - bolt connections far from the column end start to rotate and dissipate energy in cooperation with them. This construction method can effectively utilize the energy - dissipating characteristics of wave - generating steel bars and pin - bolt connections under different earthquake intensities.

[0025] (4) In the case of disasters such as strong earthquakes, explosions, and fires, when the middle column of the frame structure suddenly fails, the wave - generating steel bars and pin - bolt connections in the device of the present invention can work together with large deformations, giving full play to the catenary mechanism and enhancing the anti - progressive collapse performance of the frame structure. The installation holes of the pin - bolt connections far from the column end in the energy - dissipating beam - column joint connection device are in the shape of long and flat waist - shaped holes, which will further enhance the plastic rotation ability of the beam and increase energy dissipation, thus meeting the basic seismic fortification requirement of "remaining standing during major earthquakes" and providing certain protection for human life safety under various sudden disasters.

[0026] (5) The present invention can meet the seismic fortification requirements of "being repairable during moderate earthquakes". Under strong earthquake actions, the wave - generating and energy - dissipating beam - column joint connection device generates damage deformation to dissipate energy, thereby protecting key structures such as reinforced concrete precast columns and joints. Therefore, after an earthquake, only the severely damaged energy - dissipating devices need to be replaced to achieve the repair of the structure, which provides certain reference for the post - earthquake repair research of prefabricated frame structures.

[0027] (6) In the construction site of the present invention, since shear - resistant steel plates are embedded in precast beam - column members, this is beneficial to the connection of energy - dissipating devices and the positioning of precast beam - column members, and has good operability. Description of the Drawings

[0028] Figure 1 Schematic three-dimensional structure diagram of the wave-generating and step-by-step energy-dissipating beam-column joint connecting device of the present invention;

[0029] Figure 2 Partial explosion diagram of the wave-generating and step-by-step energy-dissipating beam-column joint connecting device of the present invention;

[0030] Figure 3 Schematic structure diagram of the reinforced concrete precast column and the reinforced concrete precast beam of the present invention;

[0031] Figure 4 Schematic structure diagram of the connection between the wave-generating and step-by-step energy-dissipating beam-column joint connecting device of the present invention and the reinforced concrete precast column and the reinforced concrete precast beam;

[0032] Figure 5 is Figure 4 Schematic structure diagram after cast-in-place concrete of the wave-generating and step-by-step energy-dissipating beam-column joint connecting device in

[0033] Figure 6 is Figure 5 Schematic internal structure diagram of

[0034] In the figure: 1. Wave-generating and step-by-step energy-dissipating beam-column joint connecting device; 2. Reinforced concrete precast column; 3. Reinforced concrete precast beam; 4. First wave-shaped longitudinal reinforcement; 5. Second wave-shaped longitudinal reinforcement; 6. First low-strength steel bar; 7. Second low-strength steel bar; 8. First shear-resistant steel plate; 9. Second shear-resistant steel plate; 10. Connection steel plate; 11. First gasket; 12. Second gasket; 13. First bolt; 14. Second bolt; 15. Reserved round hole; 16. Reserved waist-shaped hole; 17. Stirrup; 18. First grouting sleeve; 19. Second grouting sleeve; 20. Grouting hole; 21. Reinforcement reserved in the precast column; 22. Reinforcement reserved in the precast beam. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly under and obliquely under the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0038] In the following embodiments, the strength of the concrete involved is all C40.

[0039] The detection methods involved in the following embodiments are as follows:

[0040] Detection method for the seismic performance of beam-column joints:

[0041] For the research on the seismic performance of beam-column joints, a low cyclic reversed loading test is adopted. This test includes a reaction wall, a corrugated energy-dissipating beam-column specimen, a support steel frame, an electro-hydraulic servo control loading system, and data measurement and collection instruments. The specimen is placed vertically, as Figure 6 shown, and the ground beam (precast column) of the specimen is anchored to the rigid ground by two ground anchors. A horizontal actuator connected to the reaction wall is used to apply a low cyclic reversed load to the beam end far from the column until the specimen fails. The loading adopts an equal amplitude hybrid load-displacement dual control loading system (the loading level is determined by monotonic loading), that is, load control loading is adopted before the joint yields, and displacement control loading is adopted after yielding: the load is 12 kN and 32 kN, and each level is cycled once; when the displacement angle is 17 / 20, 17 / 10, 51 / 20, 17 / 5, 17 / 4, 51 / 10, each level is cycled 3 times, and then one-way pushover loading is started until the load of the specimen drops to 85% of the peak load or the hysteresis loop shows unstable phenomena, and then the test is terminated.

[0042] One displacement meter is arranged at each of the loading point at the beam end of the specimen, the ground beam, and the positions of two bolts to measure the displacements at each position during the test; one strain gauge is arranged along the length direction at each of the corrugated positions, longitudinal bars, and stirrups in the energy dissipation device, one strain rosette is arranged along the longitudinal direction on the side surface of each shear-resistant steel plate, and one strain rosette is arranged along the diagonal direction on the surface of the joint to measure the stress and strain at each position.

[0043] Example 1

[0044] As Figures 1-6As shown in the figure, this embodiment provides a wave - generating and graded energy - dissipating beam - column joint connecting device 1, which is connected between a reinforced concrete precast column 2 and a reinforced concrete precast beam 3. The reinforced concrete precast column 2 is provided with a first shear - resistant steel plate 8 and a number of precast column reserved steel bars 21. The reinforced concrete precast beam 3 is provided with a second shear - resistant steel plate 9 and a number of precast beam reserved steel bars 22. The first shear - resistant steel plate 8 and the second shear - resistant steel plate 9 are arranged opposite to each other. The wave - generating and graded energy - dissipating beam - column joint connecting device 1 includes a connecting steel plate 10, a first wave - generating longitudinal bar 4, a second wave - generating longitudinal bar 5, a first low - strength steel bar 6, a second low - strength steel bar 7, and stirrups 17. The two connecting steel plates 10 are respectively arranged on both sides of the first shear - resistant steel plate 8 and the second shear - resistant steel plate 9. The connecting steel plate 10 is fixedly connected to the first shear - resistant steel plate 8 and the second shear - resistant steel plate 9 through pin bolts. The second wave - generating longitudinal bar 5 and the first wave - generating longitudinal bar 4 are respectively located above and below the connecting steel plate 10. One end of a number of the second wave - generating longitudinal bars 5 and a number of the first wave - generating longitudinal bars 4 are butt - jointed with a number of precast column reserved steel bars 21 through a first grouting sleeve 18, and the other end is butt - jointed with a number of precast beam reserved steel bars 22 through a second grouting sleeve 19. The second low - strength steel bar 7 and the first low - strength steel bar 6 are respectively fixedly connected to the second wave - generating longitudinal bar 5 and the first wave - generating longitudinal bar 4, and a number of the second low - strength steel bars 7 and the first low - strength steel bars 6 are fixedly connected through stirrups 17.

[0045] Optionally, the first shear - resistant steel plate 8 is provided with a reserved round hole 15, the second shear - resistant steel plate 9 is provided with a reserved waist - shaped hole 16, the connecting steel plate 10 is provided with a reserved round hole 15 and a reserved waist - shaped hole 16. The reserved round hole 15 of the connecting steel plate 10 corresponds to the reserved round hole 15 of the first shear - resistant steel plate 8 and is penetrated by a first pin bolt 13. A first gasket 11 is sleeved on the first pin bolt 13, and the two first gaskets 11 are respectively abutted against the two connecting steel plates 10, so that the two connecting steel plates 10 are fixedly connected to the first shear - resistant steel plate 8. The reserved waist - shaped hole 16 of the connecting steel plate 10 corresponds to the reserved waist - shaped hole 16 of the second shear - resistant steel plate 9 and is penetrated by a second pin bolt 14. A second gasket 12 is sleeved on the second pin bolt 14, and the two second gaskets 12 are respectively abutted against the two connecting steel plates 10, so that the two connecting steel plates 10 are fixedly connected to the second shear - resistant steel plate 9.

[0046] Optionally, both ends of the first pin bolt 13 and the second pin bolt 14 are provided with protrusions. The first gasket 11 abuts against the protrusion of the first pin bolt 13, and the second gasket 12 abuts against the protrusion of the second pin bolt 14. The gasket is fixed on the pin bolt through the provided protrusions.

[0047] Optionally, a plurality of the reserved steel bars 21 of the precast columns are located on the upper and lower sides of the first shear-resistant steel plate 8, and a plurality of the reserved steel bars 22 of the precast beams are located on the upper and lower sides of the second shear-resistant steel plate 9 and correspond to the plurality of the reserved steel bars 21 of the precast columns one by one.

[0048] Optionally, both the first corrugated longitudinal bar 4 and the second corrugated longitudinal bar 5 are provided with corrugated positions recessed towards the connecting steel plate 10. The two sides of the corrugated position of the first corrugated longitudinal bar 4 are fixedly connected by the first low-strength steel bar 6, and the two sides of the corrugated position of the second corrugated longitudinal bar 5 are fixedly connected by the second low-strength steel bar 7. Optionally, the lengths of the first low-strength steel bar 6 and the second low-strength steel bar 7 are both greater than the length of the corrugated position. Preferably, the low-strength steel bar and the corrugated longitudinal bar are fixedly connected by welding.

[0049] Optionally, both the first grouting sleeve 18 and the second grouting sleeve 19 are provided with grouting holes 20, and grout is injected into the first grouting sleeve 18 and the second grouting sleeve 19 through the grouting holes 20 to fixedly connect the first corrugated longitudinal bar 4, the second corrugated longitudinal bar 5 with the reserved steel bars 21 of the precast columns and the reserved steel bars 22 of the precast beams.

[0050] Optionally, there is no contact between the first corrugated longitudinal bar 4 and the second corrugated longitudinal bar 5 and the connecting steel plate 10, and concrete is poured at the corrugated energy-dissipating beam-column joint connecting device 1.

[0051] Optionally, the length of the cast-in-place section of the first shear-resistant steel plate 8 and the second shear-resistant steel plate 9 is equal to the length of the corrugated energy-dissipating beam-column joint connecting device 1.

[0052] Optionally, the second corrugated longitudinal bar 5 is closer to the reinforced concrete precast column 2 than the first corrugated longitudinal bar 4.

[0053] Optionally, the first pin bolt 13 is located in the middle of the upper and lower ends of the corrugated position at one end of the first corrugated longitudinal bar 4 close to the reinforced concrete precast column 2 and the corrugated position at one end of the second corrugated longitudinal bar 5 close to the reinforced concrete precast column 2; the second pin bolt 14 is located in the middle of the upper and lower ends of the corrugated position at one end of the first corrugated longitudinal bar 4 close to the reinforced concrete precast beam 3 and the corrugated position at one end of the second corrugated longitudinal bar 5 close to the reinforced concrete precast beam 3.

[0054] Optionally, the connecting steel plate 10, the first shear-resistant steel plate 8 and the second shear-resistant steel plate 9 have the same height.

[0055] Embodiment 2

[0056] This embodiment provides a corrugated energy-dissipating beam-column connection method, which applies a corrugated energy-dissipating beam-column joint connecting device provided in Embodiment 1, and includes the following steps:

[0057] Step 1: Embed the first shear-resistant steel plate 8 into the reinforced concrete precast column 2, and embed the second shear-resistant steel plate 9 into the reinforced concrete precast beam 3.

[0058] Step 2: Connect the first corrugated longitudinal bars 4 and the second corrugated longitudinal bars 5 to the reserved steel bars 21 of the precast column through the first grouting sleeve 18; connect the first corrugated longitudinal bars 4 and the second corrugated longitudinal bars 5 to the reserved steel bars 22 of the precast beam through the second grouting sleeve 19.

[0059] Step 3: After the corrugated graded energy-dissipating beam-column joint connecting device 1 is respectively connected to the reinforced concrete precast column 2 and the reinforced concrete precast beam 3, the corrugated graded energy-dissipating beam-column joint connecting device 1 is cast in place with concrete.

[0060] Optionally, the concrete at the splicing position of the reinforced concrete precast column 2 extends a certain distance, that is, the concrete at the splicing position of the reinforced concrete precast column 2 extends outside the side wall of the reinforced concrete precast column 2.

[0061] Embodiment 3

[0062] This embodiment provides a corrugated graded energy-dissipating beam-column structure. The construction method of the beam-column is shown in Embodiment 2, wherein:

[0063] Reinforced concrete precast column: The cross-sectional dimension of the column is 300mm×300mm; the longitudinal bars are symmetrically reinforced, and a total of 6 HRB400 steel bars with a diameter of 14mm are arranged; the stirrups are HPB300 steel bars with a diameter of 8mm, and the spacing is 100mm; the concrete at the connection between the precast column and the energy-dissipating device extends 350mm; the shear-resistant steel plate in the precast column is embedded 100mm and extends 325mm, and the cross-sectional dimension of the shear-resistant steel plate is 50mm×10mm; the longitudinal bars at the connection are HRB400 steel bars with a diameter of 12mm, anchored 600mm and extended 120mm.

[0064] Reinforced concrete precast beam: The cross-sectional dimension of the beam is 150mm×300mm; the longitudinal bars are symmetrically reinforced, and 4 HRB400 steel bars with a diameter of 12mm are respectively arranged; the stirrups are HPB300 steel bars with a diameter of 8mm, and the spacing is 150mm, and the stirrup spacing at the corrugated position is 100mm; the shear-resistant steel plate in the precast beam is embedded 100mm and extends 400mm, and the cross-sectional dimension of the shear-resistant steel plate is 50mm×10mm; the longitudinal bars in the beam extend 120mm.

[0065] Wave - generating and energy - dissipating beam - column connection device: 8 wave - generating longitudinal bars are made of HRB400 steel bars with a diameter of 12 mm. The wave - generating positions of the second wave - generating longitudinal bar 5 are 650 mm and 950 mm away from the precast column respectively, and the wave - generating positions of the first wave - generating longitudinal bar 4 are 725 mm and 1025 mm away from the precast column respectively; the wave - generating height is 30 mm, the wave - generating length is 120 mm, and Q235 steel bars with a size of 12×5 mm are welded at the wave - generating positions, and 50 mm is welded on each side; the size of the shear - resistant connection steel plate is 350 mm×50 mm×5 mm; the radius of the gasket is 25 mm and the thickness is 2 mm; the positions of the two bolts are 650 mm and 950 mm away from the precast column respectively, the radius of the bolts is 5 mm and the length is 40 mm; the radius of the reserved round hole is 5 mm, and the radius of the reserved waist - shaped hole is 5 mm and the length is 15 mm.

[0066] According to the above - mentioned seismic performance detection method, the peak bearing capacity of the loading point, the displacement angle corresponding to the peak bearing capacity, and the ductility coefficient are 34.447 kN, 2.509, and 5.105 respectively.

[0067] Comparative Example 1

[0068] Comparative Example 1 provides a common beam - column structure. Compared with Example 3, the wave - generating and energy - dissipating beam - column joint connection device 1 is removed, and the steel bar reinforcement of the beam - column members is exactly the same. The specimen is made by the cast - in - place method.

[0069] According to the above - mentioned seismic performance detection method, the peak bearing capacity of the loading point, the displacement angle corresponding to the peak bearing capacity, and the ductility coefficient are 33.875 kN, 0.836, and 2.579 respectively.

[0070] It can be seen from this that the displacement angle and the ductility coefficient corresponding to the peak bearing capacity of Comparative Example 1 after removing the wave - generating and energy - dissipating beam - column joint connection device 1 of the present invention are much lower than those of Example 3 without removing the wave - generating and energy - dissipating beam - column joint connection device 1 of the present invention. Therefore, the wave - generating and energy - dissipating beam - column joint connection device provided by the present invention has excellent seismic performance.

[0071] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A wave - generating and grading energy - dissipating beam - column joint connection device, characterized in that It is connected between a precast reinforced concrete column (2) and a precast reinforced concrete beam (3). The precast reinforced concrete column (2) is provided with a first shear-resistant steel plate (8) and a number of precast column reserved steel bars (21), and the precast reinforced concrete beam (3) is provided with a second shear-resistant steel plate (9) and a number of precast beam reserved steel bars (22). The first shear-resistant steel plate (8) and the second shear-resistant steel plate (9) are arranged opposite to each other. The wave-rising and energy-dissipating beam-column joint connecting device (1) includes a connecting steel plate (10), a first wave-rising longitudinal bar (4), a second wave-rising longitudinal bar (5), a first low-strength steel bar (6), a second low-strength steel bar (7) and stirrups (17). The two connecting steel plates (10) are respectively arranged on both sides of the first shear-resistant steel plate (8) and the second shear-resistant steel plate (9). The connecting steel plate (10) is fixedly connected to the first shear-resistant steel plate (8) and the second shear-resistant steel plate (9) through pin bolts. The second wave-rising longitudinal bar (5) and the first wave-rising longitudinal bar (4) are respectively located above and below the connecting steel plate (10). One end of a number of the second wave-rising longitudinal bars (5) and a number of the first wave-rising longitudinal bars (4) are butt-jointed with a number of the precast column reserved steel bars (21) through a first grouting sleeve (18), and the other end is butt-jointed with a number of the precast beam reserved steel bars (22) through a second grouting sleeve (19). The second low-strength steel bar (7) and the first low-strength steel bar (6) are respectively fixedly connected to the second wave-rising longitudinal bar (5) and the first wave-rising longitudinal bar (4). A number of the second low-strength steel bars (7) and the first low-strength steel bars (6) are fixedly connected through stirrups (17).

2. The wave - generating and grading energy - dissipating beam - column joint connection device according to claim 1, wherein, The first shear-resistant steel plate (8) is provided with a reserved round hole (15), the second shear-resistant steel plate (9) is provided with a reserved waist-shaped hole (16), the connecting steel plate (10) is provided with a reserved round hole (15) and a reserved waist-shaped hole (16). The reserved round hole (15) of the connecting steel plate (10) corresponds to the reserved round hole (15) of the first shear-resistant steel plate (8) and is penetrated by a first pin bolt (13). A first gasket (11) is sleeved on the first pin bolt (13). The two first gaskets (11) are respectively abutted against the two connecting steel plates (10) so that the two connecting steel plates (10) are fixedly connected to the first shear-resistant steel plate (8). The reserved waist-shaped hole (16) of the connecting steel plate (10) corresponds to the reserved waist-shaped hole (16) of the second shear-resistant steel plate (9) and is penetrated by a second pin bolt (14). A second gasket (12) is sleeved on the second pin bolt (14). The two second gaskets (12) are respectively abutted against the two connecting steel plates (10) so that the two connecting steel plates (10) are fixedly connected to the second shear-resistant steel plate (9).

3. The wave-generating and grading energy-dissipating beam-column joint connecting device according to claim 1, wherein, A number of the precast column reserved steel bars (21) are located above and below the first shear-resistant steel plate (8). A number of the precast beam reserved steel bars (22) are located above and below the second shear-resistant steel plate (9) and correspond to a number of the precast column reserved steel bars (21) one by one.

4. The wave - generating and grading energy - dissipating beam - column joint connection device according to claim 2, characterized in that, Both the first corrugated longitudinal bars (4) and the second corrugated longitudinal bars (5) are provided with corrugated positions recessed towards the connecting steel plate (10). Both sides of the corrugated position of the first corrugated longitudinal bars (4) are fixedly connected by first low-strength steel bars (6), and both sides of the corrugated position of the second corrugated longitudinal bars (5) are fixedly connected by second low-strength steel bars (7).

5. The wave-generating and step-by-step energy-dissipating beam-column joint connecting device according to claim 1, wherein Both the first grouting sleeve (18) and the second grouting sleeve (19) are provided with grouting holes (20). Grout is injected into the first grouting sleeve (18) and the second grouting sleeve (19) through the grouting holes (20) to fixedly connect the first corrugated longitudinal bars (4), the second corrugated longitudinal bars (5) with the reserved steel bars (21) of the precast column and the reserved steel bars (22) of the precast beam.

6. The wave - generating and grading energy - dissipating beam - column joint connection device according to claim 4, wherein, The first dowel bolt (13) is located in the middle of the upper and lower ends of the corrugated position at one end of the first corrugated longitudinal bars (4) close to the reinforced concrete precast column (2) and the corrugated position at one end of the second corrugated longitudinal bars (5) close to the reinforced concrete precast column (2); the second dowel bolt (14) is located in the middle of the upper and lower ends of the corrugated position at one end of the first corrugated longitudinal bars (4) close to the reinforced concrete precast beam (3) and the corrugated position at one end of the second corrugated longitudinal bars (5) close to the reinforced concrete precast beam (3).

7. The wave - generating and grading energy - dissipating beam - column joint connecting device according to claim 1, characterized in that, The distance between the second corrugated longitudinal bars (5) and the reinforced concrete precast column (2) is less than the distance between the first corrugated longitudinal bars (4) and the reinforced concrete precast column (2).

8. The wave - generating and grading energy - dissipating beam - column joint connection device according to claim 1, characterized in that, The first corrugated longitudinal bars (4) and the second corrugated longitudinal bars (5) do not contact the connecting steel plate (10). Concrete is cast at the corrugated graded energy-dissipating beam-column joint connecting device (1); shear-resistant steel plates are embedded in both the reinforced concrete precast column (2) and the reinforced concrete precast beam (3).

9. A wave - generating and grading energy - dissipating beam - column joint connection method, characterized in that, Applying a corrugated graded energy-dissipating beam-column joint connecting device according to any one of claims 1-8, the method comprises the following steps: Step 1, embed the first shear-resistant steel plate (8) in the reinforced concrete precast column (2), and embed the second shear-resistant steel plate (9) in the reinforced concrete precast beam (3); Step 2, connect the first corrugated longitudinal bars (4) and the second corrugated longitudinal bars (5) to the reserved steel bars (21) of the precast column through the first grouting sleeve (18); connect the first corrugated longitudinal bars (4) and the second corrugated longitudinal bars (5) to the reserved steel bars (22) of the precast beam through the second grouting sleeve (19); Step 3, after the corrugated graded energy-dissipating beam-column joint connecting device (1) is respectively connected to the reinforced concrete precast column (2) and the reinforced concrete precast beam (3), concrete is cast in situ at the corrugated graded energy-dissipating beam-column joint connecting device (1).

10. A wave - generating and grading energy - dissipating beam - column joint connection method according to claim 9, characterized in that, The concrete at the splicing position of the reinforced concrete precast column (2) extends outside the side wall of the reinforced concrete precast column (2).

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