Fabricated beam-column seismic joint and construction method thereof

Abstract

The application relates to the technical field of connecting nodes in general building construction, in particular to a fabricated beam-column damping node and a construction method thereof. The beam limiting column arranged at the front end of the prefabricated concrete beam is clamped with the beam limiting groove, the connection and fixation between the beam and the column are realized through the dead weight; meanwhile, the beam side wing plates arranged at the front end of the two adjacent prefabricated concrete beams are overlapped with each other, the mutual limiting between the two adjacent prefabricated concrete beams is realized through the dead weight; meanwhile, the setting of the multiple elastic damping and shock insulation structures facilitates the kinetic energy consumption of the prefabricated concrete beam under extreme conditions such as earthquakes, the integrity and the cooperation of the beam and the column are improved, the anti-seismic effect is better, the comprehensive strength is high, and the practicality is high.

Description

Technical Field

[0001] This invention relates to the field of connection node technology in general building construction, specifically to a prefabricated beam-column vibration damping node and its construction method. Background Technology

[0002] Prefabricated construction refers to the transfer of a large amount of on-site work from traditional construction methods to factories. Building components and accessories are prefabricated in factories, transported to the construction site, and assembled on-site using reliable connection methods. The beam-column connection structure is a crucial component of prefabricated construction. In prefabricated beam-column structures, beam-column joints connect prefabricated beams and columns into a unified whole. These joints play a vital role in load transfer and seismic energy dissipation, and the connection points of load-bearing components occupy a pivotal position in frame structures.

[0003] Currently, beam-column connections are typically made by drilling holes in the concrete beams and columns and fixing them with high-strength bolts. Too few holes and bolts result in low connection strength and poor stability; while too many holes and bolts can significantly reduce and damage the structural strength of the concrete beams and columns. Furthermore, seismic isolation and damping structures are generally not considered, leading to weak overall coordination and making the concrete beams and columns more susceptible to damage in extreme conditions such as earthquakes, posing a significant safety hazard.

[0004] Furthermore, Chinese patent document CN113006274A discloses a novel precast assembled frame structure beam-column dry connection node, including a precast concrete beam, a precast concrete lower column, a precast concrete upper column, a connection end, high-strength bolts, and corbels. The precast concrete beam has a connection end at its end, with a shear key on the side near the precast concrete upper column. A reserved vertical reinforcing bar is provided at the bottom of the connection end, and a reserved through hole is provided inside the connection end. A tongue-and-groove joint is provided at the bottom of the connection end. Corbels are provided on both sides of the reserved concrete lower column, with reserved holes inside the corbels and tongue-and-groove joints on the corbels. Second, the precast concrete lower column is equipped with a limiting block, and the interior of the precast concrete lower column has reserved holes for longitudinal reinforcement. The connecting end is connected to the corbel by inserting reserved vertical steel bars into the reserved holes of the corbel. The lower end of the precast concrete upper column is equipped with reserved longitudinal reinforcement, which is inserted into the reserved holes for longitudinal reinforcement in the precast concrete lower column. The precast concrete upper column is equipped with reserved steel sleeves and shear keys. The precast concrete upper column and the precast concrete lower column are connected by inserting precast longitudinal reinforcement into the reserved holes for longitudinal reinforcement. After the reserved through hole at the upper part of the connecting end is aligned with the reserved steel sleeve inside the column body, it is fixed with high-strength bolts. There is a gap between the shear keys, and high-strength concrete grout is injected into the gap. By reserving vertical reinforcing bars at the connection ends, during the downward movement of the beam, these bars align with and pass through the pre-drilled holes in the corbel, and high-strength concrete grout is injected to achieve primary fixation. A horizontal through-hole at the top of the connection end connects to the column body. After primary fixation, the horizontal through-hole automatically aligns, allowing high-strength bolts to be inserted and tightened without fully tightening. High-strength concrete grout is then injected into the gap to complete the fixation. The shear key between the beam end and the column surface assists the corbel in shear resistance, achieving the goals of easy construction and installation, good force transmission, and high joint strength. However, the above scheme still has the following drawbacks: it does not consider vibration damping and isolation structures; although the precast concrete column uses pre-drilled steel sleeves to connect the horizontal high-strength bolts, it essentially still involves pre-drilled holes in the precast concrete column, which may affect the structural strength of the precast concrete column to some extent; furthermore, the grouting process involves high-strength concrete grout, not fully achieving a dry connection, which also presents some construction inconvenience.

[0005] Chinese patent document CN115977243A discloses a prefabricated concrete frame structure beam-column joint, including precast concrete columns and concrete beams. The four sides of the precast concrete columns are provided with trapezoidal precast corbels, and beam installation holes are provided at the junctions of the four sides of the precast concrete columns and are interconnected. There are four concrete beams, each with a beam fixing component at its front end. The beam fixing components of the four concrete beams are respectively installed in the four beam installation holes, and the beam-one locking component, beam-two locking component, beam-three locking component, and beam-four locking component at the front end of the four beam fixing components are sequentially locked. The beam installation holes are provided with column through holes, and steel plate rubber shock-absorbing pads are provided in the column through holes and fixed to the concrete beams and trapezoidal precast corbels by high-strength bolts. Although the scheme considers steel plate rubber damping pads as a damping structure, it requires opening beam installation holes inside the precast concrete column, which will affect the structural strength of the precast concrete column to some extent. In addition, the shape of the beam installation holes and the shape of the beam clamps are relatively complex, making production and processing difficult. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a prefabricated beam-column vibration damping joint that can effectively improve the connection strength and vibration damping performance at the joint while facilitating prefabrication and on-site construction.

[0007] The technical solution adopted by this invention to solve its technical problem is: a prefabricated beam-column vibration damping joint, including precast concrete beams, precast concrete columns, and bolt assemblies. Four precast concrete beams are arranged in a cross shape around the precast concrete columns. Lower and upper corbels are provided on the outer wall of the precast concrete columns. The lower corbels are a ring-shaped integral structure, and the upper corbels are located above the lower corbels. There are four upper corbels, each corresponding to one of the precast concrete beams. Steel column sleeves are provided on the outer sides of the lower corbels, upper corbels, and precast concrete columns. The steel column sleeves, lower corbels, and upper corbels are connected to the precast concrete beams. The precast concrete columns are integral structures cast and fixed together. The steel column sleeve includes at least a first horizontal end plate located on the upper end face of the lower corbel, a second horizontal end plate located on the lower end face of the lower corbel, and a third horizontal end plate located on the lower end face of the upper corbel. The front ends of the precast concrete beams are all connected to the upper surface of the first horizontal end plate. Beam limiting posts are fixedly installed on the lower surface of the front end of each precast concrete beam. Beam limiting grooves are provided on the upper surface of the first horizontal end plate, and the beam limiting posts are respectively engaged in the beam limiting grooves. Beam side wing plates are provided on the left and right sides of the front end of each precast concrete beam. The side flanges of two precast concrete beams are stacked in a staggered arrangement, forming a beam side flange stack assembly. A flange limiting component is provided on the upper surface of the first horizontal end plate on the outer side of each beam side flange stack assembly. The flange limiting component includes a limiting base and an elastic partition. The elastic partition is fixedly installed on the lower inner side of the limiting base, and the elastic partitions are inserted into the space between the two adjacent beam side flanges in a tight fit. A leaf spring limiting groove is provided on the upper inner side of the limiting base. The upper surface of the precast concrete beam and the lower surface of the third horizontal end plate... A beam limiting leaf spring is installed between the surfaces. The beam limiting leaf spring is composed of several spring steel plates stacked one on top of the other, and its two ends are respectively engaged in the limiting groove of the leaf spring. An annular upper cover plate is installed above the upper bracket and surrounds the precast concrete column. The bolt assembly includes a fixing main bolt and a locking nut that are connected. The axis of the fixing main bolt is set vertically. The fixing main bolt passes through the annular upper cover plate, the limiting base, the first horizontal end plate, the lower bracket and the second horizontal end plate at the same time. Through the cooperation with the locking nut, the annular upper cover plate, the limiting base, the lower bracket and the steel column sleeve are fixed into a whole.

[0008] For ease of assembly, the preferred design is that both the beam limiting column and the beam limiting groove are inverted truncated pyramid structures.

[0009] To facilitate prefabrication and assembly, and to further improve the reliability at the nodes, the preferred embodiment is that the elastic partition includes a steel plate layer, an upper elastic layer fixed to the upper surface of the steel plate layer, and a lower elastic layer fixed to the lower surface of the steel plate layer; the steel plate layer of the elastic partition is welded and fixed to the limiting base, and an insertion guide structure is provided at the end of the elastic partition away from the limiting base.

[0010] To further improve the reliability and vibration reduction effect at the nodes, the preferred solution is to install a beam side wing plate at the middle of the left front end of each precast concrete beam, and a beam side wing plate at the upper and lower ends of the right front end.

[0011] To further improve the reliability and vibration reduction effect at the nodes, the preferred solution is that the inner side of the limiting base is a smooth arc-shaped structural surface with the axis set vertically, and the beam side wing plate of the precast concrete beam is a fan-shaped structure. The smooth arc-shaped structural surface of the limiting base fits into the outer arc surface of the beam side wing plate of the fan-shaped structure.

[0012] To further improve the reliability and vibration reduction effect at the nodes, the preferred solution is that the wing plate limiting component includes a beam side limiting device. Multiple beam side limiting devices are arranged at intervals in the vertical direction between the two sides of the limiting base and the corresponding precast concrete crossbeams. The rear end of the beam side limiting device is fixed on the side end face of the limiting base, and the front end makes sliding contact with the side end face of the precast concrete crossbeam. The rear end and the front end of the beam side limiting device are connected by an elastic expansion joint.

[0013] To further improve the reliability and vibration reduction effect at the joint, the preferred solution is that the wing plate limiting component includes a beam-side limiting device. Multiple beam-side limiting devices are arranged at intervals along the vertical direction between the two sides of the limiting base and the corresponding precast concrete crossbeams. Each beam-side limiting device includes a limiting base plate one, a limiting outer sleeve, a limiting inner tube, a disc spring, a limiting base plate two, a limiting inner sleeve, a limiting inner core rod, and universal ball bearings. The outer end face of the limiting base plate one is fixedly installed on the side end face of the limiting base. One end of the limiting outer sleeve is fixed to the inner end face of the limiting base plate one. The limiting inner tube is coaxially arranged in the inner cavity of the limiting outer sleeve and fixed to the limiting base plate one. The disc spring... The component consists of several disc-shaped spring pieces stacked and connected in series, and is fitted into the annular space between the inner limiting tube and the outer limiting sleeve. One end of the inner limiting sleeve is fixed to the inner end face of the second limiting base plate. The inner limiting core rod is coaxially arranged in the inner cavity of the inner limiting sleeve and fixed to the inner end face of the second limiting base plate. The end of the inner limiting core rod away from the second limiting base plate is coaxially inserted into the open end of the inner limiting tube. The end of the inner limiting sleeve away from the second limiting base plate is coaxially inserted into the annular space between the outer limiting sleeve and the inner limiting tube, and is pressed against the end face of the disc-shaped spring component. Universal ball bearings are installed on the outer end face of the second limiting base plate and are in contact with the side end face of the precast concrete beam.

[0014] To further improve the reliability and vibration reduction effect at the nodes, the preferred solution is that the leaf spring limiting groove is a right-angled groove, and one end of the limiting leaf springs of two adjacent beams are tightly connected together by mutual compression or mutual locking, and locked in the leaf spring limiting groove.

[0015] To further improve the reliability at the nodes, the preferred embodiment is that the bolt assembly also includes metal adjusting components, metal fasteners, and second connecting bolts. The main fixing bolts are high-strength bolts, and four main fixing bolts are arranged in a rectangular pattern. The metal fasteners are located in the area below the second horizontal end plate, and four metal fasteners are provided. Each metal fastener is fixed to the bottom of the main fixing bolt. The metal adjusting components and locking nuts are both located above the annular upper cover plate, and the metal adjusting components are located between the annular upper cover plate and the locking nuts. There are four metal adjusting components, and each metal adjusting component is slidably fitted onto the main fixing bolt. Adjacent metal fasteners and adjacent metal adjusting components are connected and fixed by the second connecting bolts in conjunction with the fixing nuts.

[0016] To facilitate processing and assembly, and to effectively ensure the structural reliability of the bolt assembly, the preferred embodiment is that the metal adjusting component and the metal fixing component have the same structure, both including a metal base plate, a metal sleeve, and two side wing plates fixed as a whole; the metal base plate has a fan-shaped structure and is vertically fixed to the outer wall of the metal sleeve, the two side wing plates are perpendicular to each other and are both fixed to the outer wall of the metal sleeve, and one end of each side wing plate is vertically fixed to the metal base plate; each side wing plate is provided with connecting bolt holes for cooperating with the second connecting bolt, the lower end of the main fixing bolt is set in the metal sleeve of the metal fixing component and welded and fixed, and the metal adjusting component is slidably sleeved on the main fixing bolt through its metal sleeve.

[0017] To facilitate prefabrication and further improve the reliability of the joints, the preferred solution is that the steel column sleeve completely covers the upper and lower corbels, and also includes an upper column sleeve located above the upper corbel, a lower column sleeve located below the lower corbel, and a middle column sleeve located between the upper and lower corbels. The middle column sleeve, upper column sleeve, and lower column sleeve are all fixedly fitted onto the outer periphery of the precast concrete column. The steel column sleeve is fixed as a whole with the upper corbel, lower corbel, and the steel reinforcement frame set inside the precast concrete column. The horizontal cross-section of the precast concrete column is rectangular.

[0018] To improve the connection between prefabricated beams and columns and facilitate the automatic correction of positional deviations of precast concrete beams, the preferred solution is to provide vertical grooves at the left and right corners of the front end of the main body of the precast concrete beam, with the vertical grooves intersecting the upper and lower end faces of the precast concrete beam in the vertical direction; limit steel columns are provided at the connection points of two adjacent upper brackets, with the upper end of the limit steel column penetrating the annular upper cover plate and the side wall of the upper column sleeve and fixed inside the precast concrete column, and the lower end of the limit steel column penetrating the first horizontal end plate of the steel column sleeve and fixed in the lower bracket; several collars and beam limiting springs are provided on the limit steel columns, with the collars sliding on the limit steel columns, and one axial end of the beam limiting spring connected to the collar and the other end connected to the beam connector embedded in the vertical groove of the precast concrete beam.

[0019] Based on the prefabricated beam-column damping joint described above, this invention also provides a construction method for the prefabricated beam-column damping joint, comprising the following steps:

[0020] Step S1, casting and hoisting of precast concrete columns:

[0021] According to the drawings, the steel bars inside the precast concrete columns, lower corbels, and upper corbels are tied. Then, the steel column sleeves are welded and assembled on the outside of the steel bars of the precast concrete columns, lower corbels, and upper corbels. Finally, the concrete formwork is installed and concrete is poured to form the overall structure of the precast concrete columns, lower corbels, upper corbels, and steel column sleeves. At the same time, the beam limiting grooves and bolt holes corresponding to the main fixing bolts are reserved. Then, the poured precast concrete columns are hoisted.

[0022] Step S2, pouring of precast concrete beams:

[0023] According to the drawings, the steel bars inside the four precast concrete beams are tied, then the concrete formwork is installed and the concrete is poured to produce four precast concrete beams with beam side wing plates.

[0024] Step S3, hoisting of the precast concrete beam:

[0025] All four precast concrete beams were hoisted to the cast precast concrete columns, so that the side flanges of two adjacent precast concrete beams overlapped each other; then the four precast concrete beams were lowered at the same time, and the beam limiting columns at their front ends were respectively engaged in the beam limiting grooves.

[0026] Step S4, locking the prefabricated beams and columns:

[0027] The four beam limiting leaf springs are respectively engaged between the four precast concrete crossbeams and their corresponding third horizontal end plates above them; then the four wing plate limiting components are respectively installed in place; finally, the annular top cover plate and bolt assembly are installed.

[0028] In the preferred scheme of setting the limiting steel column, the corresponding construction method is as follows: In step S1, when pouring and hoisting the precast concrete column, the limiting steel column is preset. Several collars and beam limiting springs are set on the limiting steel column. The collars slide on the limiting steel column, and one axial end of the beam limiting spring is connected to the collar. In step S2, when pouring the precast concrete beam, the precast concrete beam has a reserved vertical groove. In step S3, when hoisting the precast concrete beam, when hoisting a precast concrete beam to the position above the lower bracket and close to the middle column sleeve, first connect the end of the beam limiting spring away from the collar to the corresponding beam connector, and then continue to move the precast concrete beam forward until it can no longer move. Then, the hoisting of the other three precast concrete beams is carried out in the same way, and the beam side plates of the two adjacent precast concrete beams are overlapped.

[0029] The beneficial effects of this invention are:

[0030] (1) The precast concrete columns, upper corbels, lower corbels and steel column sleeves are cast in one piece, which improves the overall structural strength of the precast concrete columns, upper corbels, lower corbels and steel column sleeves and provides a structural support foundation for the installation of the precast concrete beams in the later stage; at the same time, the steel column sleeves can protect the precast concrete columns, upper corbels and lower corbels, prevent damage to the precast concrete columns, upper corbels and lower corbels at the stress points, and improve the connection quality of the connection structure.

[0031] (2) The beam-column connection is fixed by the engagement of the beam-limiting column and the beam-limiting groove at the front end of the precast concrete beam, through its own weight; at the same time, the beam side flanges set on one side of the front end of two adjacent precast concrete beams overlap each other, and the mutual limiting between the two adjacent precast concrete beams is achieved by their own weight. In extreme cases such as earthquakes, this increases the difficulty of the precast concrete beam shifting in a certain direction, and also facilitates the automatic correction of the position shift.

[0032] (3) By setting a beam limiting leaf spring between the precast concrete beam and the upper corbel, the precast concrete beam is elastically limited; by setting wing plate limiting components on the outer side of the beam side wing plates of the two precast concrete beams overlapping each other, the beam limiting leaf spring and the beam side wing plates of the precast concrete beam are limited and fixed, and the side end faces of the two adjacent precast concrete beams are elastically limited; by installing multiple bolt assemblies in the annular upper cover plate and the steel column sleeve, the four wing plate limiting components are fixed, reducing the damage of a single bolt to the precast concrete column, upper corbel and lower corbel under extreme conditions such as earthquakes.

[0033] (4) By setting several collars on the limiting steel column and beam limiting spring, the elastic connection between the precast concrete beam and the precast concrete column is realized, which improves the connection correlation of the precast beam and column and facilitates the automatic correction of the positional deviation of the precast concrete beam.

[0034] (5) The present invention has a compact structure. It can achieve the connection and fixation of prefabricated beams and columns without drilling holes or setting bolts in the area where the prefabricated concrete columns (excluding the lower brackets and steel column sleeves) and prefabricated concrete beams are located. The beams and columns at the connection are not easily damaged, with high firmness and stability and high connection strength. At the same time, the setting of multiple elastic damping and isolation structures facilitates the kinetic energy dissipation of the prefabricated concrete beams under extreme conditions such as earthquakes, improves the integrity and cooperation of beams and columns, has a good seismic resistance effect, high comprehensive strength, and strong practicality.

[0035] (6) The precast concrete columns and precast concrete beams described in this invention have a relatively simple external structure and are easy and quick to prefabricate; the construction method described in this invention avoids secondary grouting of concrete on the construction site, and is simple, convenient, quick and safe to operate. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the prefabricated beam-column vibration damping node described in this invention;

[0037] Figure 2 for Figure 1 The elevation section view along the AA direction (i.e., the vertical section view passing through the center of the precast concrete column).

[0038] Figure 3 This is a schematic diagram of the overall structure of the precast concrete column, upper corbel, lower corbel, and steel column sleeve of the present invention.

[0039] Figure 4 This is a schematic diagram of the overall structure of the four precast concrete beams of the present invention after they are assembled together.

[0040] Figure 5 for Figure 4 A structural schematic diagram of the precast concrete beam in the right-hand area;

[0041] Figure 6 for Figure 4 A structural schematic diagram of the precast concrete beam in the front area of ​​the structure;

[0042] Figure 7 This is a schematic diagram of the structure of the wing plate limiting member of the present invention;

[0043] Figure 8 This is a schematic diagram of the beam-side limiting device of the wing plate limiting member of the present invention;

[0044] Figure 9 This is a schematic diagram of the bolt assembly of the present invention;

[0045] Figure 10 This is a structural schematic diagram of the metal adjusting member (or metal fastener) of the bolt assembly of the present invention.

[0046] The components in the diagram are labeled as follows: 1. Precast concrete beam, 11. Beam limiting column, 12. Beam side flange, 13. Vertical groove, 2. Precast concrete column, 3. Lower corbel, 4. Upper corbel, 5. Steel column sleeve, 51. Limiting steel bar column, 511. Collar, 512. Beam limiting spring, 52. Beam limiting groove, 53. Upper column sleeve, 54. Lower column sleeve, 55. Two fixing bolt holes, 56. Reinforcing rib plate, 6. Flange limiting component, 61. Limiting base, 62. Arc-shaped smooth structural surface, 63. Leaf spring limiting groove, 64. Elastic partition, 65. Beam side limiting device, 66. Limiting base plate. 651, Limiting outer sleeve 652, Limiting inner tube 653, Disc spring 654, Limiting base plate 655, Limiting inner sleeve 656, Limiting inner core rod 657, Universal ball bearing 658, Fixing bolt hole 3 66, Beam limiting leaf spring 7, Annular upper cover plate 8, Bolt assembly 9, Fixing main bolt 91, Metal adjusting part 92, Metal fixing part 93, Second connecting bolt 94, Locking nut 95, Metal base plate 921, Metal sleeve 922, Side wing plate 923, Connecting bolt hole 924, Sleeve center hole 925. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] like Figures 1 to 10 As shown, the prefabricated beam-column vibration damping node of the present invention includes a precast concrete beam 1, a precast concrete column 2, and a bolt assembly 9. Four precast concrete beams 1 are arranged in a cross shape around the precast concrete column 2, that is, each precast concrete beam 1 is orthogonal to the precast concrete column 2, and the included angle formed by the center lines of two adjacent precast concrete beams 1 is 90°. The four precast concrete beams are respectively called concrete beam one, concrete beam two, concrete beam three, and concrete beam four. Concrete beam one and concrete beam three are arranged coaxially (their center lines are set as the first center line), and concrete beam two and concrete beam four are arranged coaxially (their center lines are set as the second center line). The first center line and the second center line intersect perpendicularly.

[0049] The outer wall of the precast concrete column 2 is provided with a lower bracket 3 and an upper bracket 4. The lower bracket 3 is a ring-shaped integral structure, and the upper bracket 4 is located above the lower bracket 3. There are four upper brackets 4, which correspond one-to-one with the precast concrete crossbeams 1. A steel column sleeve 5 is provided on the outer side of the lower bracket 3, the upper bracket 4, and the precast concrete column 2. The steel column sleeve 5, the lower bracket 3, the upper bracket 4, and the precast concrete column 2 are integral structures cast and fixed together. In a preferred embodiment, the steel column sleeve 5 adopts a welded and fixed integral component structure. The steel column sleeve 5 generally completely covers at least the upper bracket 4, the lower bracket 3, and the outer periphery of the precast concrete column 2 between them. Correspondingly, the steel column sleeve 5 includes at least a first horizontal end plate located on the upper end face of the lower bracket 3, a second horizontal end plate located on the lower end face of the lower bracket 3, and a third horizontal end plate located on the lower end face of the upper bracket 4. As can be seen from the literal meaning, the first horizontal end plate, the second horizontal end plate, and the third horizontal end plate are all arranged horizontally. To facilitate construction and the arrangement of the annular top cover plate 8, the upper surface of the upper corbel 4 is also horizontally arranged. Correspondingly, the steel column sleeve 5 also includes a fourth horizontal end plate located on the upper surface of the upper corbel 4. In a further preferred embodiment, the horizontal cross-section of the precast concrete column 2 is generally rectangular, and the upper corbel 4 can generally adopt a cuboid structure. This invention firstly improves the overall structural strength of the precast concrete column 2, lower corbel 3, upper corbel 4, and steel column sleeve 5 by integrally casting the precast concrete column 2, lower corbel 3, upper corbel 4, and steel column sleeve 5, providing a structural support foundation for the subsequent installation of the precast concrete beam 1; at the same time, the steel column sleeve 5 can protect the precast concrete column 2, lower corbel 3, and upper corbel 4, preventing damage to the precast concrete column 2, lower corbel 3, and upper corbel 4 at the stress points, and improving the connection quality of the connection structure.

[0050] The front ends of the precast concrete beams 1 are all connected to the upper surface of the first horizontal end plate. Beam limiting posts 11 are fixedly installed on the lower surface of the front ends of the precast concrete beams 1. Beam limiting grooves 52 are provided on the upper surface of the first horizontal end plate, and the beam limiting posts 11 are respectively engaged in the beam limiting grooves 52. The precast concrete beams 1 are engaged and fixed in the beam limiting grooves 52 by their own weight, thus achieving the initial connection and fixation between the beams and columns. Specifically, the beam limiting grooves 52 can adopt a blind hole structure or be formed using a sheet metal forming process.

[0051] Each precast concrete beam 1 has a beam side wing plate 12 on its left and right front sides. The beam side wing plates 12 of two adjacent precast concrete beams 1 are stacked in a vertically spaced manner (that is, there is an insertion gap between two adjacent beam side wing plates 12 that matches the elastic partition plate 64), forming a beam side wing plate stacking assembly. In other words, all the beam side wing plates 12 in the included angle area between two adjacent precast concrete beams 1 constitute a beam side wing plate stacking assembly. In the preferred embodiment shown in the figure, each precast concrete beam 1 has a beam side wing plate 12 in the middle of the left front side and a beam side wing plate 12 at the upper and lower ends of the right front side. That is, each beam side wing plate stacking assembly has three beam side wing plates 12 arranged vertically spaced. Two elastic partition plates 64 can be inserted between the three beam side wing plates 12. This combination method can effectively achieve mutual locking between the four precast concrete beams 1, and can achieve the connection and fixation of the "cross-shaped" assembled beam and column without drilling holes and connecting bolts. In some alternative embodiments, the beam side plates 12 in each beam side plate stack assembly may also be provided in other quantities.

[0052] The present invention uses beam side wing plates 12 set on one side of the front end of two adjacent precast concrete beams 1 to overlap each other, and achieves mutual restraint between the two adjacent precast concrete beams 1 by self-weight. In extreme cases such as earthquakes, it increases the difficulty of the position displacement of the precast concrete beams 1 in a certain direction, and also facilitates the automatic correction of position displacement.

[0053] The upper surface of the first horizontal end plate is provided with a wing plate limiting member 6 on the outer side of each beam side wing plate stacking assembly. The wing plate limiting member 6 includes a limiting base 61 and an elastic partition 64. The elastic partition 64 is fixedly installed on the lower part of the inner side of the limiting base 61. The elastic partition 64 is inserted into the space between two adjacent beam side wing plates 12 in a tight fit, which is equivalent to the elastic partition 64 being inserted into the insertion gap formed by the two beam side wing plates 12 being arranged at intervals. The thickness of the elastic partition 64 in its natural state is greater than the vertical width of the insertion gap.

[0054] A leaf spring limiting groove 63 is provided on the upper part of the inner side of the limiting base 61. A beam limiting leaf spring 7 is provided between the upper surface of the precast concrete beam 1 and the lower surface of the third horizontal end plate. The beam limiting leaf spring 7 is composed of several spring steel plates stacked on top of each other, and its two ends are respectively engaged in the leaf spring limiting groove 63. An annular upper cover plate 8 is provided above the upper bracket 4 and surrounds the precast concrete column 2. The bolt assembly 9 includes a fixing main bolt 91 and a locking nut 95 that are connected. The axes of the fixing main bolts 91 are all vertically set. The fixing main bolts 91 pass through the annular upper cover plate 8, the limiting base 61, the first horizontal end plate, the lower bracket 3 and the second horizontal end plate at the same time. Through the cooperation with the locking nut 95, the annular upper cover plate 8, the limiting base 61, the lower bracket 3 and the steel column sleeve are connected. 5. When fixed as a whole, it can be understood that each wing plate limiting component 6 is provided with at least one main fixing bolt 91. Each component is provided with bolt holes corresponding to the main fixing bolt 91. The specific settings of each bolt hole are as follows: the annular upper cover plate 8 is provided with a first fixing bolt hole; the first horizontal end plate, the lower bracket 3, and the second horizontal end plate are provided with a second fixing bolt hole 55 (preferably provided in the form of a pre-embedded sleeve); and the limiting base 61 is provided with a third fixing bolt hole 66. The main fixing bolt 91 should meet the design strength requirements. High-strength bolts are usually preferred. "High-strength bolt" is a common term in this field. Bolts made of high-strength steel or bolts that require a large preload can be called high-strength bolts. The performance grade of the bolt is usually above grade 8.8. The beam limiting leaf spring 7 is used to achieve elastic limiting of the precast concrete beam 1; the wing plate limiting component 6 is used to limit and fix the beam limiting leaf spring 7 and the beam side wing plate 12 of the precast concrete beam 1; the four wing plate limiting components 6 are fixed by multiple bolt assemblies 9 installed in the annular upper cover plate 8 and the steel column sleeve 5, reducing the damage of a single bolt to the precast concrete column 2 and the corbel under extreme conditions such as earthquakes.

[0055] The prefabricated beam-column vibration damping joint described in this invention has a compact structure. It allows for the connection and fixation of the prefabricated beam and column without the need for drilling holes or installing bolts in the area where the precast concrete column 2 (excluding the lower corbel 3 and steel column sleeve 5) and the precast concrete beam 1 are located. The connection between the beam and column is not easily damaged, exhibiting high robustness and stability, and high connection strength. Simultaneously, the arrangement of multiple elastic vibration damping and isolation structures facilitates the dissipation of kinetic energy in the precast concrete beam 1 under extreme conditions such as earthquakes, improving the overall integrity and coordination of the beam and column, resulting in good seismic resistance, high comprehensive strength, and strong practicality.

[0056] Based on the prefabricated beam-column damping joint implementation described above, the construction method of the prefabricated beam-column damping joint of the present invention includes the following steps:

[0057] Step S1, pouring and hoisting of precast concrete column 2:

[0058] According to the drawings, the steel bars inside the precast concrete column 2, lower corbel 3, and upper corbel 4 are tied. Then, the steel column sleeve 5 is welded and assembled on the outside of the steel bars of the precast concrete column 2, lower corbel 3, and upper corbel 4. Finally, the concrete formwork is installed and concrete is poured to form the overall structure of the precast concrete column 2, lower corbel 3, upper corbel 4, and steel column sleeve 5. At the same time, the beam limiting groove 52 and the bolt holes corresponding to the main fixing bolt 91 (i.e., fixing bolt hole 2 55) are reserved. Then, the poured precast concrete column 2 is hoisted.

[0059] Step S2, pouring of precast concrete beam 1:

[0060] According to the drawings, the steel bars inside the four precast concrete beams 1 are tied, then the concrete formwork is installed and the concrete is poured to produce four precast concrete beams 1 with beam side wing plates 12.

[0061] Step S3, hoisting of precast concrete beam 1:

[0062] All four precast concrete beams 1 are hoisted to the cast precast concrete column 2, so that the beam side flanges 12 of two adjacent precast concrete beams 1 overlap each other; then the four precast concrete beams 1 are lowered in height at the same time, and the beam limiting columns 11 at their front ends are respectively locked in the beam limiting grooves 52.

[0063] Step S4, locking the prefabricated beams and columns:

[0064] Four beam limiting leaf springs 7 are respectively engaged between the four precast concrete crossbeams 1 and their corresponding third horizontal end plates above them; then the four wing plate limiting parts 6 are respectively installed in place; finally, the annular upper cover plate 8 and bolt assembly 9 are installed. In a preferred embodiment, the locking nut 95 is located above the annular upper cover plate 8, and the bolt head of the fixing main bolt 91 is located below the second horizontal end plate. Specifically, the fixing main bolt 91 passes through the fixing bolt hole 2 55 in the area where the lower bracket 3 is located, the fixing bolt hole 3 66 on the limiting base 61, and the fixing bolt hole 1 on the annular upper cover plate 8 from bottom to top, and finally the locking nut 95 is tightened.

[0065] The construction method described in this invention avoids secondary grouting of concrete on the construction site, and is simple, convenient, quick, safe and reliable to operate.

[0066] It is understood that the solution of this invention is specifically designed for cross-shaped beam-column joints. For the rear ends of the four precast concrete beams 1, at the connections with other concrete columns, load-bearing walls, etc., a non-cross-shaped joint structure design should be adopted as much as possible, and conventional bolts should be used for fixing (conventional damping pads can also be considered). For example, bolt connection ends can be fixedly installed on the left and right sides of the rear end of the precast concrete beams 1 respectively. In step S3, the height of the four precast concrete beams 1 is lowered simultaneously, and the beam limiting columns 11 at their front ends are respectively engaged in the beam limiting grooves 52; at the same time, the bolt connection ends at the rear ends of the precast concrete beams 1 are also lowered into place, and finally, the bolt connection ends are fixedly connected to the corresponding connected objects (other concrete columns, load-bearing walls) by cooperating with the bolts.

[0067] For ease of assembly, in some preferred embodiments, both the beam limiting column 11 and the beam limiting groove 52 are inverted truncated pyramid structures. The interlocking of the inverted truncated pyramid structure beam limiting column 11 and beam limiting groove 52 facilitates the conversion of the kinetic energy of the precast concrete beam 1 into its potential energy during an earthquake, ultimately returning it to its original position, resulting in better seismic resistance.

[0068] To facilitate prefabrication and assembly, and to further improve the reliability at the joints, in some preferred embodiments, the elastic partition 64 includes a steel plate layer, an upper elastic layer fixed to the upper surface of the steel plate layer, and a lower elastic layer fixed to the lower surface of the steel plate layer. The steel plate layer of the elastic partition 64 is welded and fixed to the limiting base 61, and an insertion guide structure is provided at the end of the elastic partition 64 away from the limiting base 61. The upper and lower elastic layers can be made of various materials with a certain degree of elasticity, such as silicone or rubber. The upper and lower elastic layers are generally fixed by adhesive bonding. In some preferred embodiments, the upper and lower elastic layers can also be designed as an integral structure, with the two connected and transitioned at the end of the elastic partition 64 away from the limiting base 61 by a rounded corner structure, thereby forming the aforementioned insertion guide structure.

[0069] To further improve the reliability and vibration reduction effect at the nodes, in some other preferred embodiments, the inner side of the limiting base 61 is an arc-shaped smooth structural surface 62 with the axis set vertically, and the beam side wing plate 12 of the precast concrete beam 1 is a fan-shaped structure. The arc-shaped smooth structural surface 62 of the limiting base 61 fits against the outer arc surface of the fan-shaped beam side wing plate 12.

[0070] To further improve the reliability and vibration reduction effect at the joint, in some preferred embodiments, the wing plate limiting component 6 includes beam-side limiting devices 65. Multiple beam-side limiting devices 65 are arranged at intervals along the vertical direction between the two sides of the limiting base 61 and the corresponding precast concrete beam 1. The rear end of the beam-side limiting device 65 is fixed to the side end face of the limiting base 61, and the front end makes sliding contact with the side end face of the precast concrete beam 1. The rear end and front end of the beam-side limiting device 65 are connected by an elastic expansion joint. The elastic expansion joint can generally be any type of spring, as long as it ensures that the front end of the beam-side limiting device 65 maintains sliding contact with the side end face of the precast concrete beam 1. In some preferred embodiments, a sliding guide structure consistent with the expansion direction can also be added between the rear end and front end of the beam-side limiting device 65. For example, the following scheme, which includes a limiting base plate 651, a limiting outer sleeve 652, a limiting inner tube 653, a disc spring 654, a limiting base plate 655, a limiting inner sleeve 656, and a limiting inner core rod 657, can be implemented by simply removing the universal ball bearing 658 and adding a fixed spherical contact end to the outer end face of the limiting base plate 655.

[0071] In some other preferred embodiments, the wing plate limiting member 6 includes beam-side limiting devices 65. Multiple beam-side limiting devices 65 are arranged at intervals along the vertical direction between the two sides of the limiting base 61 and the corresponding precast concrete crossbeam 1. Each beam-side limiting device 65 includes a limiting base plate 1 651, a limiting outer sleeve 652, a limiting inner tube 653, a disc spring 654, a limiting base plate 2 655, a limiting inner sleeve 656, a limiting inner core rod 657, and a universal ball bearing 658. The outer end face of the limiting base plate 1 651 is fixedly mounted on the side end face of the limiting base 61. One end of the limiting outer sleeve 652 is fixed to the inner end face of the limiting base plate 1 651. The limiting inner tube 653 is coaxially disposed within the inner cavity of the limiting outer sleeve 652 and fixed to the limiting base plate 1 651. The disc spring 654 consists of several... A series of disc-shaped spring plates are stacked and connected together, and are fitted into the annular space between the inner limiting tube 653 and the outer limiting sleeve 652. One end of the inner limiting sleeve 656 is fixed to the inner end face of the second limiting base plate 655. The inner limiting core rod 657 is coaxially arranged in the inner cavity of the inner limiting sleeve 656 and fixed to the inner end face of the second limiting base plate 655. The end of the inner limiting core rod 657 away from the second limiting base plate 655 is coaxially inserted into the open end of the inner limiting tube 653. The end of the inner limiting sleeve 656 away from the second limiting base plate 655 is coaxially inserted into the annular space between the outer limiting sleeve 652 and the inner limiting tube 653 and is pressed against the end face of the disc-shaped spring member 654. The universal ball bearing 658 is installed on the outer end face of the second limiting base plate 655 and contacts the side end face of the precast concrete beam 1. This invention effectively achieves elastic compression and limiting of the side end face of the precast concrete beam 1 through the relative sliding between the limiting outer sleeve 652 and the limiting inner sleeve 656 and the deformation of the disc spring 654. In this structural design, the universal ball bearing 658 makes rolling contact with the side end face of the precast concrete beam 1. Compared with the sliding contact scheme described above, this reduces wear on the side end face of the precast concrete beam 1 and is more conducive to the vibration damping effect.

[0072] To further improve the reliability and vibration reduction effect at the nodes, in some preferred embodiments, the leaf spring limiting groove 63 is a right-angled groove, and one end of two adjacent beam limiting leaf springs 7 are tightly connected together by mutual compression or mutual locking, and locked in the leaf spring limiting groove 63.

[0073] To further improve the reliability at the nodes, in some other preferred embodiments, the bolt assembly 9 further includes a metal adjusting member 92, a metal fixing member 93, and a second connecting bolt 94. Four main fixing bolts 91 are arranged in a rectangular pattern. The metal fixing members 93 are located in the area below the second horizontal end plate, and there are four metal fixing members 93. Each metal fixing member 93 is correspondingly fixed to the bottom of the main fixing bolt 91. In some embodiments, the metal fixing member 93 can also serve as the bolt head of the main fixing bolt 91. In other embodiments, the fixing member 93... The main bolt 91 may also have a bolt head, with the metal fastener 93 fixed relative to the bolt head. The metal adjusting member 92 and the locking nut 95 are both located above the annular upper cover plate 8, with the metal adjusting member 92 positioned between the annular upper cover plate 8 and the locking nut 95. Four metal adjusting members 92 are provided, each corresponding to and slidingly fitted onto the main bolt 91. Adjacent metal fasteners 93 and adjacent metal adjusting members 92 are connected and fixed via a second connecting bolt 94 in conjunction with a fixing nut. In the preferred embodiment described above, the main bolt 91 may further be a high-strength bolt.

[0074] To facilitate processing and assembly, and to effectively ensure the structural reliability of the bolt assembly, in some other preferred embodiments, the metal adjusting member 92 and the metal fixing member 93 have the same structure, both including a metal base plate 921 fixed as a whole, a metal sleeve 922, and two side wing plates 923 (preferably integrally formed by machining); the metal base plate 921 has a fan-shaped structure and is vertically fixed on the outer wall of the metal sleeve 922 (that is, the axis of the metal sleeve 922 is perpendicular to the two large surfaces of the metal base plate 921). Two side wing plates 923 are perpendicular to each other and fixed to the outer wall of the metal sleeve 922, with one end of each side wing plate 923 vertically fixed to the metal base plate 921. Each side wing plate 923 has a connecting bolt hole 924 for connecting the second connecting bolt 94. The lower end of the main fixing bolt 91 is located inside the metal sleeve 922 of the metal fixing member 93 (i.e., inserted into the central hole 925 of the sleeve) and welded in place. The metal adjusting member 92 slides on the main fixing bolt 91 through its metal sleeve 922. During assembly, the metal adjusting member 92 is locked in place using a locking nut 95. In specific implementation, in step S4, when fixing the connecting bolt assembly 9, the metal adjusting part 92 is first initially locked and fixed using the locking nut 95. At this time, the metal adjusting part 92, the metal fixing part 93, the annular upper cover plate 8, the limiting base 61, the lower bracket 3, and the steel column sleeve 5 are fixed as a whole. Then, the two adjacent metal fixing parts 93 and the two adjacent metal adjusting parts 92 are connected and fixed by the second connecting bolt 94 and the fixing nut, respectively. Finally, the locking nuts 95 on the four main fixing bolts 91 are finally adjusted, fixed, and locked.

[0075] To facilitate prefabrication and further improve the reliability of the joints, in some preferred embodiments, the steel column sleeve 5 completely encloses the upper bracket 4 and the lower bracket 3, and also includes an upper column sleeve 53 located above the upper bracket 4, a lower column sleeve 54 located below the lower bracket 3, and a middle column sleeve located between the upper bracket 4 and the lower bracket 3. The middle column sleeve, upper column sleeve 53, and lower column sleeve 54 are all fixedly fitted around the periphery of the precast concrete column 2. The steel column sleeve 5 is fixed as a whole with the upper bracket 4, the lower bracket 3, and the steel reinforcement frame set inside the precast concrete column 2. The horizontal cross-section of the precast concrete column 2 is rectangular. The upper bracket 4 can generally adopt four independent cuboid structures. The lower bracket 3 can be set as a ring-shaped integral structure according to the arrangement requirements of the limiting base 61. In the preferred embodiment shown in the figure, the main body of the lower bracket 3 is a columnar structure, and its cross-sectional outer contour is a rounded rectangular structure. Then, several reinforcing ribs 56 are added between the second horizontal end plate of the steel column sleeve 5 and the lower column sleeve 54. In some alternative embodiments, the lower bracket 3 may also adopt a truncated cone structure. For example, the outer peripheral surface of the lower bracket 3 may be designed as a conical prism with an upper side length greater than the lower side length, or the outer peripheral surface of the lower bracket 3 may be designed as a conical surface with an upper diameter greater than the lower diameter.

[0076] To improve the connection between prefabricated beams and columns and facilitate the automatic correction of positional deviations of precast concrete beams, in some preferred embodiments, vertical grooves 13 are respectively provided at the left and right corners of the front end of the main body of the precast concrete beam 1. The vertical grooves 13 intersect the upper and lower end faces of the precast concrete beam 1 in the vertical direction. Limiting steel bars 51 are provided at the connection of two adjacent upper brackets 4. The upper end of the limiting steel bar 51 passes through the side wall of the annular upper cover plate 8 and the upper column sleeve 53 and is fixed in the precast concrete column 2. The lower end of the limiting steel bar 51 passes through the first horizontal end plate of the steel column sleeve 5 and is fixed in the lower bracket 3. Several collars 511 and beam limiting springs 512 are provided on the limiting steel bar 51. The collars 511 slide on the limiting steel bar 51. One axial end of the beam limiting spring 512 is connected to the collar 511 and the other end is connected to the beam connector embedded in the vertical groove 13 of the precast concrete beam 1. This invention strengthens and fixes the limiting steel bar column 51 by using an annular upper cover plate 8 and a steel column sleeve 5, reducing the stress of the limiting steel bar column 51 on the precast concrete column 2 and the lower corbel 3, and preventing damage to the precast concrete column 2 and the lower corbel 3; by using several collars 511 and beam limiting springs 512 set on the limiting steel bar column 51, elastic connection is achieved between the precast concrete beam 1 and the precast concrete column 2 and the upper corbel 4, improving the connection correlation of the precast beam and column, and facilitating the automatic correction of the positional deviation of the precast concrete beam 1.

[0077] In the preferred embodiment of the above-mentioned setting of the limiting steel column 51, the corresponding construction method is as follows: In step S1, when pouring and hoisting the precast concrete column 2, the limiting steel column 51 is pre-set. Several collars 511 and beam limiting springs 512 are set on each limiting steel column 51. The collars 511 slide on the limiting steel column 51, and one axial end of the beam limiting spring 512 is connected to the collar 511. In step S2, when pouring the precast concrete beam 1, the precast concrete beam 1 is pre-set with... In step S3, when hoisting the precast concrete beam 1, when hoisting a precast concrete beam 1 above the lower bracket 3 and close to the middle column sleeve, first connect the end of the beam limiting spring 512 away from the collar 511 to the corresponding beam connector, and then continue to move the precast concrete beam 1 forward until it can no longer move; then hoist the other three precast concrete beams 1 in the same way, and make the beam side wing plates 12 of the two adjacent precast concrete beams 1 overlap each other.

[0078] In a preferred embodiment of the present invention, the overall construction method includes the following steps:

[0079] Step S1, pouring and hoisting of precast concrete column 2:

[0080] According to the drawings, the steel bars inside the precast concrete column 2, lower corbel 3, and upper corbel 4 are tied. Then, the steel column sleeve 5 is welded and assembled on the outside of the steel bars of the precast concrete column 2, lower corbel 3, and upper corbel 4. Finally, the concrete formwork is installed and concrete is poured to form the overall structure of the precast concrete column 2, lower corbel 3, upper corbel 4, and steel column sleeve 5. At the same time, the beam limiting groove 52 and the bolt holes corresponding to the main fixing bolt 91 (i.e., fixing bolt hole 2 55) are reserved. Then, the poured precast concrete column 2 is hoisted.

[0081] Step S2, pouring of precast concrete beam 1:

[0082] According to the drawings, the steel bars inside the four precast concrete beams 1 are tied, then the concrete formwork is installed and the concrete is poured to produce four precast concrete beams 1 with beam side wing plates 12.

[0083] Step S3, hoisting of precast concrete beam 1:

[0084] When a precast concrete beam 1 is hoisted above the lower corbel 3 and close to the central column sleeve (its position around the precast concrete column 2 is consistent with the designed installation position), first connect the end of the beam limiting spring 512 away from the collar 511 to the corresponding beam connector, and then continue to move the precast concrete beam 1 forward until it can no longer move; then hoist the other three precast concrete beams 1 in the same way, and make the beam side wing plates 12 of the two adjacent precast concrete beams 1 overlap each other; then lower the height of the four precast concrete beams 1 simultaneously, and make the beam limiting columns 11 at their front ends respectively engage in the beam limiting grooves 52, thereby realizing the hoisting of the precast concrete beams 1;

[0085] Step S4, locking the prefabricated beams and columns:

[0086] Four beam limiting leaf springs 7, each consisting of several spring steel sheets stacked on top of each other, are respectively engaged between four precast concrete crossbeams 1 and the third horizontal end plate above them, and the ends of two adjacent beam limiting leaf springs 7 are tightly connected together by mutual compression or engagement.

[0087] Install the four wing plate limiting parts 6 into place, so that their elastic partitions 64 are inserted into the space between the two adjacent beam side wing plates 12 in a tight fit, so that the connecting ends of the two adjacent beam limiting leaf springs 7 are engaged in the leaf spring limiting grooves 63, so that all beam side limiting devices 65 are pressed and contacted with the side end face of the corresponding precast concrete beam 1, so that the arc-shaped smooth structural surface 62 of the limiting base 61 is in contact with the outer arc surface of the fan-shaped beam side wing plate 12;

[0088] After welding the metal fastener 93 of the bolt assembly 9 to the bottom end of the main fixing bolt 91, the main fixing bolt 91 is passed from bottom to top through the second fixing bolt hole 55 in the area where the lower bracket 3 is located, the third fixing bolt hole 66 on the limiting base 61, and the first fixing bolt hole on the annular upper cover plate 8. Then, the metal adjusting piece 92 is fitted onto the main fixing bolt 91 above the annular upper cover plate 8, and then initially locked by the locking nut 95. At this time, the metal adjusting piece 92, the metal fastener 93, the annular upper cover plate 8, the limiting base 61, the lower bracket 3, and the steel column sleeve 5 are fixed into a whole. Then, the two adjacent metal fasteners 93 and the two adjacent metal adjusting pieces 92 are connected and fixed by the second connecting bolt 94 and the fixing nut, respectively. Finally, the locking nuts 95 on the four main fixing bolts 91 are finally adjusted, fixed, and locked.

[0089] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A prefabricated beam-column vibration damping joint, comprising a precast concrete beam (1), a precast concrete column (2), and a bolt assembly (9), wherein four precast concrete beams (1) are arranged in a cross shape around the precast concrete column (2), characterized in that, The outer wall of the precast concrete column (2) is provided with a lower corbel (3) and an upper corbel (4). The lower corbel (3) is a ring-shaped integral structure. The upper corbel (4) is located above the lower corbel (3). There are four upper corbels (4), which correspond one-to-one with the precast concrete beams (1). The lower corbel (3), the upper corbel (4) and the precast concrete column (2) are provided with steel column sleeves (5). The steel column sleeves (5), the lower corbel (3), the upper corbel (4) and the precast concrete column (2) are integral structures cast and fixed together. The steel column sleeves (5) include at least a first horizontal end plate located on the upper end face of the lower corbel (3) and a second horizontal end plate located on the lower end face of the lower corbel (3). The front end of the precast concrete beam (1) is connected to the upper surface of the first horizontal end plate and the third horizontal end plate located on the lower end face of the upper corbel (4). The lower surface of the front end of the precast concrete beam (1) is fixedly provided with beam limiting columns (11). The upper surface of the first horizontal end plate is provided with beam limiting grooves (52). The beam limiting columns (11) are respectively engaged in the beam limiting grooves (52). The left and right sides of the front end of each precast concrete beam (1) are respectively provided with beam side wing plates (12). The beam side wing plates (12) of two adjacent precast concrete beams (1) are arranged in an overlapping manner with vertical spacing, and form a beam side wing plate overlapping assembly. The first horizontal end plate The upper surface of the plate is provided with a wing plate limiting member (6) on the outside of each beam side wing plate stacking assembly. The wing plate limiting member (6) includes a limiting base (61) and an elastic partition (64). The elastic partition (64) is fixedly set on the lower part of the inner side of the limiting base (61). The elastic partition (64) is inserted into the space between two adjacent beam side wing plates (12) in a tight fit. The upper part of the inner side of the limiting base (61) is provided with a leaf spring limiting groove (63). A beam limiting leaf spring (7) is provided between the upper surface of the precast concrete beam (1) and the lower surface of the third horizontal end plate. The beam limiting leaf spring (7) is composed of several spring steel plates stacked on top of each other. The upper bracket (4) is provided with an annular upper cover plate (8) surrounding the precast concrete column (2); the bolt assembly (9) includes a connecting main bolt (91) and a locking nut (95) that are connected together. The axes of the main bolt (91) are all vertical. The main bolt (91) passes through the annular upper cover plate (8), the limiting base (61), the first horizontal end plate, the lower bracket (3) and the second horizontal end plate. Through the cooperation with the locking nut (95), the annular upper cover plate (8), the limiting base (61), the lower bracket (3) and the steel column sleeve (5) are fixed into a whole.

2. The prefabricated beam-column vibration damping joint according to claim 1, characterized in that, The beam limiting column (11) and the beam limiting groove (52) are both inverted quadrangular frustum structures; the elastic partition (64) includes a steel plate layer, an upper elastic layer fixed to the upper surface of the steel plate layer and a lower elastic layer fixed to the lower surface of the steel plate layer; the steel plate layer of the elastic partition (64) is welded and fixed to the limiting base (61), and an insertion guide structure is provided at the end of the elastic partition (64) away from the limiting base (61); a beam side wing plate (12) is provided at the middle of the left front end of each precast concrete beam (1), and a beam side wing plate (12) is provided at the upper and lower ends of the right front end respectively.

3. The prefabricated beam-column vibration damping joint according to claim 1, characterized in that, The inner side of the limiting base (61) is an arc-shaped smooth structural surface (62) with the axis set vertically. The beam side wing plate (12) of the precast concrete beam (1) is a fan-shaped structure. The arc-shaped smooth structural surface (62) of the limiting base (61) is in contact with the outer arc surface of the fan-shaped beam side wing plate (12).

4. The prefabricated beam-column vibration damping joint according to claim 3, characterized in that, The wing plate limiting component (6) includes a beam side limiting device (65). Multiple beam side limiting devices (65) are arranged at intervals in the vertical direction between the two sides of the limiting base (61) and the corresponding precast concrete beam (1). The rear end of the beam side limiting device (65) is fixed on the side end face of the limiting base (61), and the front end makes sliding contact with the side end face of the precast concrete beam (1). The rear end and the front end of the beam side limiting device (65) are connected by an elastic expansion member.

5. The prefabricated beam-column vibration damping joint according to claim 3, characterized in that, The wing plate limiting component (6) includes a beam side limiting device (65). Multiple beam side limiting devices (65) are arranged at intervals in the vertical direction between the two sides of the limiting base (61) and the corresponding precast concrete crossbeam (1). Each beam side limiting device (65) includes a limiting base plate one (651), a limiting outer sleeve (652), a limiting inner tube (653), a disc spring (654), a limiting base plate two (655), and a limiting inner sleeve (655). 6) Limiting inner core rod (657) and universal ball bearing (658); the outer end face of limiting base plate one (651) is fixedly installed on the side end face of limiting base (61); one end of limiting outer sleeve (652) is fixed on the inner end face of limiting base plate one (651); limiting inner tube (653) is coaxially arranged in the inner cavity of limiting outer sleeve (652) and fixed on limiting base plate one (651); disc spring (654) consists of several discs The spring sheets are stacked and connected in series, and are sleeved in the annular space between the inner limiting tube (653) and the outer limiting sleeve (652); one end of the inner limiting sleeve (656) is fixed to the inner end face of the second limiting base plate (655), and the inner limiting core rod (657) is coaxially arranged in the inner cavity of the inner limiting sleeve (656) and fixed to the inner end face of the second limiting base plate (655); the inner limiting core rod (657) is away from the second limiting base plate (655). One end of the limiting inner tube (653) is coaxially inserted into the opening end of the limiting inner sleeve (656), and the other end of the limiting inner sleeve (656) away from the limiting base plate two (655) is coaxially inserted into the annular space between the limiting outer sleeve (652) and the limiting inner tube (653), and is pressed against the end face of the disc spring (654); the universal ball (658) is installed on the outer end face of the limiting base plate two (655) and contacts the side end face of the precast concrete beam (1).

6. The prefabricated beam-column vibration damping joint according to claim 1, characterized in that, The leaf spring limiting groove (63) is a right-angled groove. One end of two adjacent beam limiting leaf springs (7) are tightly connected together by mutual squeezing or mutual locking, and locked in the leaf spring limiting groove (63).

7. The prefabricated beam-column vibration damping joint according to claim 1, characterized in that, The bolt assembly (9) also includes a metal adjusting member (92), a metal fixing member (93), and a second connecting bolt (94). The main bolt (91) is a high-strength bolt. There are four main bolts (91) arranged in a rectangular shape. The metal fixing member (93) is located in the area below the second horizontal end plate. There are four metal fixing members (93). The metal fixing members (93) are fixed to the bottom of the main bolt (91) one by one. The metal adjusting member (92) and the locking nut (95) are both located above the annular upper cover plate (8). The metal adjusting member (92) is located between the annular upper cover plate (8) and the locking nut (95). There are four metal adjusting members (92). The metal adjusting members (92) are slidably sleeved on the main bolt (91) one by one. The two adjacent metal fixing members (93) and the two adjacent metal adjusting members (92) are connected and fixed by the second connecting bolt (94) and the fixing nut. The metal adjusting component (92) and the metal fixing component (93) have the same structure, both including a metal base plate (921) fixed as a whole, a metal sleeve (922) and two side wing plates (923); the metal base plate (921) is a fan-shaped structure and is vertically fixed on the outer wall of the metal sleeve (922), the two side wing plates (923) are perpendicular to each other and are both fixed on the outer wall of the metal sleeve (922), and one end of each side wing plate (923) is vertically fixed on the metal base plate (921); each side wing plate (923) is provided with a connecting bolt hole (924) for cooperating with the second connecting bolt (94), the lower end of the main fixing bolt (91) is set in the metal sleeve (922) of the metal fixing component (93) and is welded and fixed, and the metal adjusting component (92) is slidably sleeved on the main fixing bolt (91) through its metal sleeve (922).

8. The prefabricated beam-column damping joint according to any one of claims 1 to 7, characterized in that, The steel column sleeve (5) completely encloses the upper corbel (4) and the lower corbel (3), and also includes the upper column sleeve (53) located above the upper corbel (4), the lower column sleeve (54) located below the lower corbel (3), and the middle column sleeve located between the upper corbel (4) and the lower corbel (3). The middle column sleeve, the upper column sleeve (53), and the lower column sleeve (54) are all fixedly fitted around the periphery of the precast concrete column (2). The steel column sleeve (5) is fixed as a whole with the upper corbel (4), the lower corbel (3), and the steel reinforcement frame set inside the precast concrete column (2). The horizontal cross section of the precast concrete column (2) is rectangular. Vertical grooves (13) are respectively provided at the left and right corners of the front end of the main body of the precast concrete beam (1). The vertical grooves (13) are vertically connected to the precast concrete beam (1). The upper and lower ends of the concrete beam (1) intersect; a limiting steel column (51) is provided at the connection of two adjacent upper corbels (4). The upper end of the limiting steel column (51) passes through the side wall of the annular upper cover plate (8) and the upper column sleeve (53) and is fixed in the precast concrete column (2). The lower end of the limiting steel column (51) passes through the first horizontal end plate of the steel column sleeve (5) and is fixed in the lower corbel (3). Several collars (511) and beam limiting springs (512) are provided on the limiting steel column (51). The collars (511) slide on the limiting steel column (51). One axial end of the beam limiting spring (512) is connected to the collar (511) and the other end is connected to the beam connector embedded in the vertical groove (13) of the precast concrete beam (1).

9. A construction method for prefabricated beam-column vibration damping joints, characterized in that, The prefabricated beam-column damping joint according to any one of claims 1 to 7 is implemented, and includes the following steps: Step S1, casting and hoisting of precast concrete column (2): According to the drawings, the steel bars inside the precast concrete column (2), lower corbel (3) and upper corbel (4) are tied. Then, the steel column sleeve (5) is welded and assembled on the outside of the steel bars of the precast concrete column (2), lower corbel (3) and upper corbel (4). Finally, the concrete formwork is installed and the concrete is poured to form the overall structure of the precast concrete column (2), lower corbel (3), upper corbel (4) and steel column sleeve (5). At the same time, the beam limiting groove (52) and the bolt holes corresponding to the main fixing bolt (91) are reserved. Then, the precast concrete column (2) is hoisted. Step S2, pouring of precast concrete beam (1): According to the drawings, the steel bars inside the four precast concrete beams (1) are tied, and then the concrete formwork is installed and the concrete is poured to produce four precast concrete beams (1) with beam side wing plates (12). Step S3, hoisting of the precast concrete beam (1): All four precast concrete beams (1) are hoisted to the cast precast concrete column (2) so that the beam side wing plates (12) of two adjacent precast concrete beams (1) overlap each other; then the four precast concrete beams (1) are lowered in height at the same time, and the beam limiting column (11) at the front end of the beam is respectively locked in the beam limiting groove (52). Step S4, locking the prefabricated beams and columns: The four beam limiting leaf springs (7) are respectively engaged between the four precast concrete crossbeams (1) and the corresponding third horizontal end plate above them; then the four wing plate limiting parts (6) are respectively installed in place; finally, the annular top cover plate (8) and bolt assembly (9) are installed.

10. The construction method of the prefabricated beam-column vibration damping joint according to claim 9, characterized in that, In step S1, during the pouring and hoisting of the precast concrete column (2), its steel column sleeve (5) completely covers the upper corbel (4) and the lower corbel (3), and also includes the upper column sleeve (53) located above the upper corbel (4), the lower column sleeve (54) located below the lower corbel (3), and the middle column sleeve located between the upper corbel (4) and the lower corbel (3). The middle column sleeve, the upper column sleeve (53), and the lower column sleeve (54) are all fixedly fitted around the outer periphery of the precast concrete column (2); the steel column sleeve (5) is fixed as a whole with the upper corbel (4), the lower corbel (3), and the steel reinforcement frame set inside the precast concrete column (2); the precast concrete column (2) The horizontal cross section is rectangular; a limiting steel column (51) is provided at the connection of two adjacent upper corbels (4). The upper end of the limiting steel column (51) passes through the annular upper cover plate (8) and the side wall of the upper column sleeve (53) and is fixed in the precast concrete column (2). The lower end of the limiting steel column (51) passes through the first horizontal end plate of the steel column sleeve (5) and is fixed in the lower corbel (3). Several collars (511) and beam limiting springs (512) are provided on the limiting steel column (51). The collars (511) slide on the limiting steel column (51), and one axial end of the beam limiting spring (512) is connected to the collars (511). In step S2, when the precast concrete beam (1) is being poured, vertical grooves (13) are reserved at the left and right corners of the front end of the main body of the precast concrete beam (1). The vertical grooves (13) intersect with the upper and lower end faces of the precast concrete beam (1) in the vertical direction. The inner wall of the vertical grooves (13) is pre-set with beam connectors for connecting the beam limiting springs (512). In step S3, when hoisting the precast concrete beam (1), when hoisting a precast concrete beam (1) above the lower bracket (3) and close to the middle column sleeve, first connect the end of the beam limiting spring (512) away from the collar (511) to the corresponding beam connector, and then continue to move the precast concrete beam (1) forward until it can no longer move; then hoist the other three precast concrete beams (1) in the same way, and make the beam side plates (12) of the two adjacent precast concrete beams (1) overlap each other.

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