CN111877546A - A prefabricated frame beam-column wet joint with buckling restraint support and construction method - Google Patents

Abstract

The invention belongs to the technical field of fabricated buildings, and particularly relates to a fabricated frame beam-column wet joint with buckling restrained braces and a construction method. An assembly type frame beam-column wet joint with buckling restrained braces comprises a prefabricated lower column, a prefabricated upper column, a superposed beam and a BRB mounting embedded part; the prefabricated lower column and the superposed beam are connected through a cast-in-place concrete connector, and a column bottom seam of the prefabricated upper column is arranged at the elevation of the floor; the superposed beam comprises a precast beam and a concrete cast-in-place layer at the top of the precast beam, and the beam end of the precast beam is provided with a precast groove; the BRB installation embedded part comprises a column bottom embedded part, a beam end embedded part and an ear plate, wherein the column bottom embedded part is embedded at the column bottom of the prefabricated upper column, the beam end embedded part is embedded at the beam end of the superposed beam, and the ear plate is connected with the column bottom embedded part and the beam end embedded part. The related processes of member prefabrication, construction installation and the like are relatively simple, so that the construction quality of beam column joints and the installation quality of BRB installation embedded parts can be ensured, and the popularization and the application of the technology are facilitated.

Description

A prefabricated frame beam-column wet joint with buckling restraint support and construction method

technical field

The invention belongs to the technical field of prefabricated buildings, and in particular relates to a prefabricated frame beam-column wet joint with buckling constraint support and a construction method.

Background technique

Prefabricated construction technology can improve the construction efficiency and engineering quality of buildings. It is an environmentally friendly construction technology and an important research direction in the field of construction in my country. Prefabricated concrete frame structure is a structure formed by assembling and connecting prefabricated beams and columns. It is well known that the connection of prefabricated beam-column joints is divided into two methods: dry connection and wet connection. The wet connection method is to use cast-in-place concrete at the beam-column joint. Sexual characteristics. The frame structure using the wet connection method is called an assembled integral frame structure. The assembled integral frame structure generally adopts a laminated beam, and the laminated beam is composed of a prefabricated beam and a post-cast concrete laminated layer. For the prefabricated concrete frame structure, the column-column longitudinal reinforcement is generally connected by a grouting sleeve, so the grouting quality of the grouting sleeve is the basis for ensuring the quality of the column-column connection, while the grouting and grouting channels The length of the grouting sleeve has a significant effect on the grouting quality of the grouting sleeve.

The advantage of the frame structure is that it can form a flexible and larger building space, and the scope of application is very wide. For higher concrete frame structures in high seismic intensity areas, the requirements for seismic lateral displacement limits are often not met. In order to improve the seismic capacity of the concrete frame structure, shock-absorbing supports can be installed on the frame structure. According to different shock absorption principles and application scenarios, there are many types of shock absorption supports. At present, buckling restraint support (BRB) is a type of shock absorption support that is widely used. When installing the BRB at the beam-column node of the cast-in-place concrete frame structure, the embedded parts are generally embedded at the beam end and the column end, and the embedded parts are connected with the BRB by bolts or welding.

With the large-scale construction of prefabricated concrete structures, there will be more and more prefabricated concrete frame structures installed with BRBs. The difficulties of installing BRB on the prefabricated concrete frame structure are: First, when the composite beam is used, if the beam end embedded parts are embedded in the prefabrication stage of the prefabricated beam, the embedded steel plate overhead on the top of the beam will not only affect the prefabricated beam The transportation and installation of the beam will have an impact, and it is not conducive to the pouring of the concrete cast-in-place layer at the beam end of the superimposed beam; grouting channel, thus affecting the grouting quality of the grouting sleeve. In view of the above reasons, in some practical projects, the beam-column joints of the fabricated concrete frame structure are changed from rigid connection to hinged connection to facilitate the installation of BRB. For beam-column joints of concrete frame structures, rigid joints have better bearing capacity than hinged joints.

In summary, a beam-column wet joint structure suitable for prefabricated concrete frame structures with BRB installation embedded parts at beam ends and column ends has a large number of practical engineering needs.

SUMMARY OF THE INVENTION

The invention aims to solve the problem that when the BRB is installed on the beam-column wet node of the prefabricated frame, the overhead of the embedded steel plate at the beam end will affect the transportation and installation of the prefabricated beam and the pouring of the superimposed layer concrete at the bottom of the steel plate; the embedded steel plate near the bottom of the column The grouting and grouting channels of the grouting sleeve are lengthened, which is not conducive to ensuring the grouting quality of the grouting sleeve.

In order to solve the proposed technical problem, the technical solution of the present invention is: a prefabricated frame beam-column wet joint with buckling restraint support, including prefabricated lower columns, prefabricated upper columns, superimposed beams, and BRB installation embedded parts. The prefabricated lower column and the superimposed beam are connected by a cast-in-place concrete connector; the column bottom joint of the prefabricated upper column is set at the floor elevation, and the column bottom joint is filled with grouting material; the column top of the prefabricated lower column is The elevation is the same as that of the beam bottom of the superimposed beam; the superimposed beam includes a prefabricated beam and a concrete cast-in-place layer on the top of the prefabricated beam, and the beam end of the prefabricated beam has a prefabricated groove; the concrete connecting body includes a beam-column joint. Cast-in-place concrete and cast-in-place concrete at the grooves of prefabricated beams; the BRB installation embedded parts include column bottom embedded parts, beam end embedded parts and lugs, and the column bottom embedded parts are pre-buried at the column bottom of the prefabricated upper column , the beam end embedded parts are pre-buried at the beam ends of the superimposed beam, and the lugs are connected with the column bottom embedded parts and the beam end embedded parts.

Further, a grouting sleeve is pre-buried at the bottom of the prefabricated upper column, and the upper end of the grouting sleeve is mechanically connected with the longitudinal bars of the prefabricated upper column; There are screw holes on the steel plate, and nuts are screwed on the screw holes, and the screw holes correspond to the positions of the grouting port and the grout outlet of the grouting sleeve;

The column top of the prefabricated lower column extends out of the longitudinal reinforcement of the node column, and the outer side of the longitudinal reinforcement of the node column is provided with a node column stirrup; the longitudinal reinforcement of the node column is connected with the grouting sleeve by grouting;

The beam top of the prefabricated beam protrudes out of the closed stirrup, the inner side of the upper end of the closed stirrup binds the longitudinal reinforcement of the beam top, the longitudinal reinforcement of the beam top penetrates the beam-column joint, and the beam end of the prefabricated beam extends out of the longitudinal reinforcement of the beam bottom. Anchoring section; the top surfaces on both sides of the groove are pre-embedded with horse stool bars; the beam end embedded parts are welded by beam top steel plates and beam top anchor bars, and the beam top steel plates are placed on the horse stool bars, The beam top anchor bars protrude into the grooves of the prefabricated beams.

Further, the bottom surface of the prefabricated upper column is provided with a keyway and a rough surface, the concave-convex depth of the rough surface is greater than or equal to 6mm, and the area of the rough surface is greater than or equal to 80% of the area of the bottom surface of the prefabricated upper column; the depth of the keyway is greater than or equal to 30mm, the width is greater than or equal to 3 times the depth and less than 10 times the depth; the distance from the notch of the keyway to the edge of the section of the prefabricated upper column is greater than or equal to 50mm; the spacing between the keyways is equal to the width of the keyway; The inclination angle of the inclined surface at the end of the keyway is less than or equal to 30°.

Further, the column top surface of the prefabricated lower column is provided with a rough surface, the area of the rough surface is greater than or equal to 80% of the area of the column top surface, and the uneven depth of the rough surface is greater than or equal to 6mm.

Further, the wall thicknesses on both sides of the groove are the same, and the wall thickness on one side is greater than or equal to 1/6 of the width of the prefabricated beam; the sum of the groove depth of the groove and the thickness of the cast-in-place concrete layer is greater than the beam top anchor bar The sum of the vertical projected length of the beam and the thickness of the steel plate on the top of the beam; the concrete thickness from the bottom of the groove groove to the bottom of the precast beam meets the thickness requirement of the concrete protective layer required by the longitudinal reinforcement at the bottom of the beam, and is greater than or equal to the height of the precast beam section 1/4; two horse stool bars are pre-buried on the top surfaces of both sides of the groove.

Further, connecting reinforcing ribs are pre-embedded on both sides of the groove, and the connecting reinforcing ribs are in the shape of "┌┒"; The inner side and bottom of the groove are provided with rough surfaces, and the area of the rough surfaces is greater than or equal to 80% of the total area of the surfaces where the rough surfaces are located; flush.

Rough surfaces are arranged on the inner and bottom surfaces of the grooves at the beam ends of the prefabricated beams, which can strengthen the bonding ability of the new and old concrete, and further improve the integrity of the end sections of the composite beams by pre-embedding the reinforcement bars in the grooves. So as to ensure the stability of the anchor bars of the beam end embedded parts. The purpose of limiting the size of the relevant section of the groove is to ensure the ability of the groove section of the beam end to bear the construction load during the construction stage. When the groove depth of the groove does not meet the straight anchor length of the anchor bar, the anchor bar of the beam end embedded part can be bent. In the form of anchors, the longitudinal depth of the anchorage is reduced.

After the pre-embedded steel plate of the column bottom embedded part of the prefabricated upper column has the screw hole, the phenomenon of stress concentration at the edge of the screw hole will occur. By installing the nut on the screw hole, not only the grouting and grouting channel of the grouting sleeve can be closed, In addition, the stress concentration phenomenon at the edge of the screw hole can be reduced, thereby improving the stress shape of the embedded steel plate embedded at the bottom of the column.

A construction method of the above-mentioned prefabricated frame beam-column wet joint with buckling restraint support, specifically comprising the following steps:

S1: According to the design requirements, prefabricated prefabricated lower columns, prefabricated upper columns and prefabricated beams in the factory;

S2: Position and install prefabricated lower columns and prefabricated beams at the construction site, and use temporary supports to fix the prefabricated lower columns and prefabricated beams; bind the column stirrups at the beam-column joints, and bind the longitudinal reinforcement on the top of the beam on the inner side of the horizontal section at the upper end of the closed stirrup;

S3: Support formwork, pour concrete connector, pour concrete cast-in-place layer, level concrete plane; locate and install beam end embedded parts, insert the beam top anchor bars of the beam end embedded parts into the beam end grooves, and the beam top of the beam end embedded parts The steel plate is placed on the bench bar at the beam end, and the embedded part of the beam end is adjusted until the side of the steel plate at the top of the beam is flush with the column side of the prefabricated upper column; the concrete connecting body and the cast-in-place concrete layer are maintained;

S4: Lay grouting material above the beam-column joint, lift the prefabricated upper column, insert the longitudinal bars of the node column into the grouting sleeve of the prefabricated upper column, grouting the grouting sleeve, and grouting the grouting sleeve at the pre-buried steel plate After the cylinder grouting is completed, screw the nuts into the screw holes on the embedded steel plate, and use temporary supports to fix the prefabricated upper column;

S5: Connect the lug plate to the embedded steel plate of the column bottom embedded part and the beam top steel plate of the beam end embedded part respectively, and connect the lug plate to the BRB by bolts or welding;

S6: Dismantle temporary support, dismantle formwork and other subsequent construction operations.

Compared with the prior art, the advantages of the present invention are:

The invention provides a prefabricated frame beam-column wet joint with buckling restraint support and a construction method. The frame structure forms a rigid frame system through the beam-column joint and the cast-in-place concrete at the beam end groove. Compared with hinged frames, rigid-connected frames have obvious advantages in static load-bearing performance, seismic capacity and construction cost. From the perspective of static load bearing, the calculated height of the frame column of the rigidly connected frame is small, the vertical bearing capacity is higher, and the stability is better; from the perspective of earthquake resistance, the rigidly connected frame can pass the plastic internal force of the frame beam. distribution to improve the energy dissipation capacity of the structure, and form multiple seismic fortification lines of the frame structure; from the perspective of construction cost, the beams and columns of the hinged frame are generally connected by steel connection components, and the steel connection components are responsible for larger beam-column joints The internal force, especially the frame with BRB, the steel connecting component also needs to bear the axial force from the BRB, which makes the stress distribution of the steel connecting component more complicated, and the required materials and installation costs are high. The construction cost at the beam-column joint is significantly reduced when the wet joint is constructed as described above.

The invention provides a beam-column wet joint structure of a prefabricated concrete frame with BRB installation embedded parts, through the techniques of opening screw holes on the embedded steel plates of the column bottom embedded parts and opening grooves at the beam ends of the prefabricated beams The construction method of beam-column joints with embedded parts at the bottom of the columns in the prefabrication stage and embedded parts at the ends of the beams in the construction stage is established. The construction quality of column joints and the installation quality of BRB installation embedded parts are beneficial to the popularization and application of technology.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic diagram of BRB installation embedded parts;

Fig. 3 is the schematic diagram of the column bottom of the prefabricated upper column;

4 is a schematic diagram of the top of a prefabricated lower column;

Figure 5 is a schematic diagram of the reinforcement of the prefabricated beam and the installation of the beam end embedded parts.

In the figure: 1-prefabricated lower column; 1-1-joint column longitudinal bars; 2-prefabricated upper column; 2-1-grouting sleeve; 2-2-keyway; 3-grouting material; 4-concrete connector; 5 -BRB; 6-BRB installation embeds; 7-prefabricated beams; 7-1-grooves; 7-2-enclosed stirrups; 7-3-horse stool bars; 7-4-anchoring segments; Connecting reinforcing bars; 8-Concrete cast-in-place layer; 9-Embedding parts at the bottom of columns; 9-1-Embedding steel plates; 9-1-1-Screw holes; 9-2-Anchor bars; 10-Embedding parts at beam ends; 10 -1- Beam top steel plate; 10-2- Beam top anchor bar; 11- Ear plate; 12- Node column stirrup; 13- Beam top longitudinal steel bar; 14- Nut.

Detailed ways

In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings. The content shown in each figure is only used to understand the technical content of the invention, and does not represent the actual scale and real shape of the product, wherein the same reference numerals indicate parts with the same structure or the same function but similar structures.

In this text, "parallel", "perpendicular" and the like are not limitations in strict mathematical and/or geometric senses, and may also include errors that can be understood by those skilled in the art and allowable when manufacturing or using the product. In addition, "perpendicular" includes not only the mutual perpendicularity when two objects are directly in contact with each other in space, but also the mutual perpendicularity when two objects are not in contact with each other in space.

As shown in Figure 1, a prefabricated frame beam-column wet joint with buckling restraint support includes a prefabricated lower column 1, a prefabricated upper column 2, a composite beam, a concrete connector 4, a BRB 5, and a BRB installation embedded part 6; The superimposed beam is composed of a prefabricated beam 7 and a concrete cast-in-place layer 8; the column bottom joint of the prefabricated upper column 2 is set at the floor elevation, and the column bottom joint is filled with grouting material 3; the column top elevation of the prefabricated lower column 1 The beam bottom elevation is the same as that of the composite beam; the prefabricated lower column and the composite beam are connected by a cast-in-place concrete connector 4, and the concrete connector 4 includes the cast-in-place concrete at the beam-column node and the prefabricated beam groove 7-1; BRB The installation embedded parts 6 include the column bottom embedded parts 9, the beam end embedded parts 10 and the lugs 11, the column bottom embedded parts 9 are pre-buried in the column bottom of the prefabricated upper column 2, and the beam end embedded parts 10 are pre-buried in the beam of the superimposed beam end.

As shown in 1. Figure 2, the embedded part 9 at the bottom of the column is welded by the embedded steel plate 9-1 and the anchor bar 9-2, and the embedded steel plate 9-1 of the embedded part at the bottom of the column is provided with a screw hole 9-1-1 , the screw hole 9-1-1 is screwed with a nut 14, and the screw hole 9-1-1 corresponds to the position of the grouting port and the grout outlet of the grouting sleeve 2-1; the embedded steel plate 9- The bottom of 1 is flush with the bottom of the prefabricated upper column 2, and the embedded steel plate 9-1 of the embedded part at the bottom of the column is flush with the outer surface of the prefabricated upper column 2; The bars 10-2 are welded; the anchor bars 9-2 and the beam top anchor bars 10-2 can be in the form of straight anchors or curved anchors.

As shown in Figures 1 and 3, the bottom of the prefabricated upper column 2 is pre-embedded with a grouting sleeve 2-1, and the upper end of the grouting sleeve 2-1 is threadedly connected to the longitudinal bars of the prefabricated upper column 2; the bottom surface of the prefabricated upper column 2 is provided with Keyway 2-2 and rough surface, the depth of the rough surface is greater than or equal to 6mm, the area of the rough surface is greater than or equal to 80% of the area of the bottom surface of the prefabricated upper column 2; the depth of the keyway 2-2 is greater than or equal to 30mm, the width is greater than or equal to 3 times the depth and less than 10 times the depth. The distance from the notch of the keyway 2-2 to the edge of the section of the prefabricated upper column 2 is greater than or equal to 50mm; the distance between the keyway 2-2 is equal to the width of the keyway 2-2; the inclination angle of the inclined plane at the end of the keyway 2-2 is less than or equal to 30° .

As shown in Figures 1 and 4, the column top of the prefabricated lower column 1 extends the node column longitudinal bar 1-1, and the node column longitudinal bar 1-1 is provided with a node column stirrup 12 on the outside; the node column longitudinal bar 1-1 It is connected with the grouting sleeve 2-1 by grouting; the top surface of the prefabricated lower column 1 is set with a rough surface, the area of the rough surface should not be less than 80% of the area of the top surface of the column, and the depth of the rough surface should not be less than 6mm.

As shown in Figures 1 and 5, the closed stirrup 7-2 extends from the top of the prefabricated beam 7, and the inner side of the upper end of the closed stirrup 7-2 binds the longitudinal steel bar 13 on the top of the beam, and the longitudinal steel bar 13 on the top of the beam penetrates the beam Column node; the beam end of the prefabricated beam 7 extends out of the anchoring section 7-4 of the longitudinal reinforcement at the bottom of the beam, and the anchoring section 7-4 of the longitudinal reinforcement at the bottom of the beam can be in the form of a curved anchor or a straight anchor as required; the beam of the prefabricated beam 7 The end prefabricated groove 7-1, the wall thickness on both sides of the groove 7-1 is the same, and the wall thickness on one side is greater than or equal to 1/6 of the width of the prefabricated beam 7; the groove depth of the groove 7-1 is the same as that of the cast-in-place concrete The sum of the thickness of the layer 8 is greater than the sum of the vertical projection length of the beam top anchor bar 10-2 and the thickness of the beam top steel plate 10-1; The thickness of the concrete protective layer required by the bottom longitudinal reinforcement is not less than 1/4 of the height of the section of the prefabricated beam 7; the top surfaces on both sides of the groove 7-1 are pre-buried with 2 horse stool bars 7-3; the groove 7 -1 Pre-embedded connection reinforcing ribs 7-5 on both sides, connecting reinforcing ribs 7-5 are "┌┒"; The inner side and bottom surface of the groove 7-1 are provided with rough surfaces, and the area of the rough surface is greater than or equal to 80% of the surface area where the rough surface is located; Then, insert the beam top anchor bar 10-2 into the beam end groove 7-1, the beam top steel plate 10-1 of the beam end embedded part rests on the beam end bench bar 7-4, the beam end embedded part beam top steel plate 7-4 The side edge of 10-1 is flush with the column edge of prefabricated upper column 2.

A construction method for a beam-column wet joint of a prefabricated frame with buckling restraint bracing, specifically comprising the following steps:

(1) According to the design requirements, the relevant components are prefabricated in the factory, including the prefabricated lower column 1, the prefabricated upper column 2, and the prefabricated beam 7. The longitudinal reinforcement of the prefabricated upper column 2 is screwed with the grouting sleeve 2-1, and the column bottom of the prefabricated upper column 2 is pre-buried with the column bottom embedded part 9; The beam end of the beam 7 is pre-fabricated into a groove section, the top surfaces on both sides of the groove 7-1 are pre-embedded with two horse stool bars 7-4, and the two sides of the groove 7-1 are pre-embedded to connect the reinforcing bars 7- 5. The beam top of the prefabricated beam 7 is extended with a closed stirrup 7-1, and the beam end of the prefabricated beam 7 is extended with a longitudinal reinforcement anchoring section 7-2.

(2) Position and install the prefabricated lower column 1 and prefabricated beam 7 at the construction site, and use temporary support to fix the prefabricated lower column 1 and prefabricated beam 7; The inner side of the upper horizontal section is bound to the longitudinal reinforcement bar 13 on the top of the beam;

(3) Support the formwork, pour the concrete connector 4, pour the concrete cast-in-place layer 8, level the concrete plane; locate and install the beam end embedded part 10, and insert the anchor bar 10-2 of the beam end embedded part 10 into the beam end groove 7-1 In the middle, the embedded steel plate 10-1 of the embedded part of the beam end is placed on the bench bar 7-4 of the beam end, and the side edge of the embedded steel plate 10-1 of the embedded part of the beam end is adjusted to be aligned with the column edge of the prefabricated upper column 2. flat; curing concrete connector 4 and cast-in-place concrete layer 8;

(4) Lay the grouting material 3 above the beam-column joint, lift the prefabricated upper column 2, insert the longitudinal bars 1-1 of the joint column into the grouting sleeve 2-1 of the prefabricated upper column 2, and align the grouting sleeve 2-1. Carry out the grouting operation. After the grouting sleeve 2-1 at the pre-embedded steel plate 9-1 is grouted, screw the nut 14 into the screw hole 9-1-1, and use the temporary support to fix the prefabricated upper column 2;

(5) The lugs 11 are respectively welded and connected with the embedded steel plate 9-1 of the column bottom embedded part and the embedded steel plate 10-1 of the beam end embedded parts, and the lug 11 and the BRB are connected by bolts or welding;

(6) Subsequent construction operations such as dismantling temporary supports and dismantling formwork.

It should be understood that although this specification is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims (7)

1. An assembled frame beam-column wet joint with buckling restraint support, characterized in that it comprises a prefabricated lower column (1), a prefabricated upper column (2), a superimposed beam, and a BRB installation embedded part (6). The prefabricated lower column (1) and the superimposed beam are connected by a cast-in-place concrete connecting body (4); the column bottom joint of the prefabricated upper column (2) is set at the floor elevation, and the column bottom joint is made of grouting material (3). ) filling; the column top elevation of the prefabricated lower column (1) is the same as the beam bottom elevation of the composite beam; the composite beam includes the prefabricated beam (7) and the concrete cast-in-place layer (8) on top of the prefabricated beam (7). ), the beam end of the prefabricated beam (7) has a prefabricated groove (7-1); the concrete connecting body (4) includes the cast-in-place concrete at the beam-column joint and the groove (7-1) of the prefabricated beam (7). ); the BRB installation embedded parts include column bottom embedded parts (9), beam end embedded parts (10) and lugs (11), and the column bottom embedded parts (9) are pre-buried on the prefabricated The column bottom of the column (2), the beam end embedded part (10) is pre-embedded at the beam end of the superimposed beam, the lug plate (11) is connected with the column bottom embedded part (9) and the beam end embedded part (10) connect. 2. The prefabricated frame beam-column wet joint with buckling restraint support according to claim 1, characterized in that: the column bottom of the prefabricated upper column (2) is pre-embedded with a grouting sleeve (2-1), The upper end of the grouting sleeve (2-1) is mechanically connected with the longitudinal reinforcement of the prefabricated upper column (2); the column bottom embedded part (9) is welded by the pre-embedded steel plate (9-1) and the anchor reinforcement (9-2). The pre-embedded steel plate (9-1) is provided with screw holes (9-1-1), the screw holes (9-1-1) are screwed with nuts (14), the screw holes (9-1-1) and grouting The position of the grouting port of the sleeve (2-1) corresponds to the position of the grout outlet; The column top of the prefabricated lower column (1) extends out of the node column longitudinal reinforcement (1-1), and the node column longitudinal reinforcement (1-1) is provided with a node column stirrup (12) on the outer side; the node column longitudinal reinforcement (1-1) is connected with the grouting sleeve (2-1) by grouting; Closed stirrups (7-2) protrude from the beam top of the prefabricated beam (7), and the inner side of the upper end of the closed stirrups (7-2) binds longitudinal reinforcement bars (13) at the top of the beam, and longitudinal reinforcement bars (13) at the top of the beam. ) runs through the beam-column joint, and the beam end of the prefabricated beam (7) protrudes from the anchoring section (7-4) of the longitudinal reinforcement at the bottom of the beam; Stool bars (7-3); the beam end embedded parts (10) are welded by beam top steel plates (10-1) and beam top anchor bars (10-2), and the beam top steel plates (10-1) are placed on On the horse stool bar (7-3), the beam top anchor bar (10-2) extends into the groove (7-1) of the prefabricated beam (7). 3. An assembled frame beam-column wet joint with buckling constraint support according to claim 2, characterized in that: the bottom surface of the prefabricated upper column (2) is provided with a keyway (2-2) and a rough surface. The concave-convex depth of the surface is greater than or equal to 6mm, and the area of the rough surface is greater than or equal to 80% of the bottom surface area of the prefabricated upper column (2); the depth of the keyway (2-2) is greater than or equal to 30mm, and the width is greater than or equal to 3 of the depth. times and less than 10 times the depth; the distance from the notch of the keyway (2-2) to the edge of the section of the prefabricated upper column (2) is greater than or equal to 50mm; the distance between the keyways (2-2) is equal to the keyway The width of (2-2); the inclination angle of the inclined plane at the end of the keyway (2-2) is less than or equal to 30°. The prefabricated frame beam-column wet joint with buckling restraint support according to claim 2, characterized in that: the column top surface of the prefabricated lower column (1) is provided with a rough surface, and the area of the rough surface is greater than or It is equal to 80% of the top surface area of the column, and the uneven depth of the rough surface is greater than or equal to 6mm. The prefabricated frame beam-column wet joint with buckling restraint support according to claim 2, characterized in that: the wall thicknesses on both sides of the groove (7-1) are the same, and the wall thickness on one side is the same. Greater than or equal to 1/6 of the width of the prefabricated beam (7); the sum of the groove depth of the groove (7-1) and the thickness of the concrete cast-in-place layer (8) is greater than the vertical projection of the beam top anchor bar (10-2) The sum of the length and the thickness of the steel plate (10-1) at the top of the beam; the thickness of the concrete from the bottom of the groove (7-1) to the bottom of the prefabricated beam (7) meets the thickness requirement of the concrete protective layer required by the longitudinal reinforcement at the bottom of the beam , and at the same time greater than or equal to 1/4 of the section height of the prefabricated beam (7); two horse stool bars (7-3) are pre-buried on the top surfaces of both sides of the groove (7-1). The prefabricated frame beam-column wet joint with buckling restraint support according to claim 2, characterized in that: connecting reinforcing ribs (7-5) are pre-embedded on both sides of the groove (7-1), The connecting reinforcing rib (7-5) is in the shape of "┌┒"; the joint surface between the prefabricated beam (7) and the concrete cast-in-place layer (8) is provided with a rough surface, and the end face of the prefabricated beam (7) and the The inner and bottom surfaces of the groove (7-1) are provided with rough surfaces, and the area of the rough surfaces is greater than or equal to 80% of the total area of the surfaces where the rough surfaces are located; The sides are flush with the column edges of the prefabricated upper column (2). 7. The construction method of the prefabricated frame beam-column wet joint with buckling restraint support as claimed in any one of claims 1-6, characterized in that, comprising the following steps: S1: According to the design requirements, the prefabricated lower column (1), the prefabricated upper column (2), and the prefabricated beam (7) are prefabricated in the factory; S2: Position and install the prefabricated lower column (1) and prefabricated beam (7) at the construction site, and use temporary support to fix the prefabricated lower column (1) and prefabricated beam (7); bind the column stirrups (12) at the The inner side of the horizontal section of the upper end of the closed stirrup (7-2) is bound to the longitudinal reinforcement bar (13) on the top of the beam; S3: Support formwork, pour concrete connector (4), pour concrete cast-in-place layer (8), level the concrete plane; locate and install beam end embedded parts (10), and anchor the beam top anchor bars (10) of the beam end embedded parts (10). 10-2) Insert into the groove (7-1) of the beam end, the beam top steel plate (10-1) of the embedded part of the beam end rests on the bench bar (7-3) of the beam end, and adjust the embedded part of the beam end to the top of the beam The side edge of the steel plate (10-1) is flush with the column edge of the prefabricated upper column (2); the curing concrete connecting body (4) and the cast-in-place concrete layer (8); S4: Lay the grouting material (3) above the beam-column joint, lift the prefabricated upper column (2), and insert the longitudinal reinforcement (9) of the joint column into the grouting sleeve (2-1) of the prefabricated upper column (2), The grouting sleeve (2-1) is grouted. After the grouting of the grouting sleeve (2-1) at the embedded steel plate (9-1) is completed, screw the nut (14) into the embedded steel plate (9-1). In the screw holes (9-1-1) on 9-1), use temporary support to fix the prefabricated upper column (2); S5: Weld and connect the lug plate (11) to the embedded steel plate (9-1) of the column bottom embedded part and the beam top steel plate (10-1) of the beam end embedded part. The lug plate (11) is connected to the BRB by bolts or Welding, etc. connection; S6: Dismantle temporary support, dismantle formwork and other subsequent construction operations.

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