Prefabricated column connecting structure in beam column joint

Abstract

The utility model provides a prefabricated column connecting structure in a beam-column joint, and belongs to the field of fabricated buildings, the structure comprises an upper prefabricated column, a lower prefabricated column and a prefabricated beam, an anti-shearing piece is embedded in the end, close to the beam-column joint, of the prefabricated beam, and the prefabricated beam is at least provided with an anti-bending bottom bar, an anti-bending surface bar and a stirrup which are separated from the anti-shearing piece in the beam length direction; the anti-bending bottom bar is embedded in the bottom of the precast beam, the anti-bending surface bar is located on a post-cast laminated surface layer of the precast beam, and the stirrup is connected to the anti-bending surface bar and the anti-bending bottom bar; the prefabricated beam is arranged at the top of the lower prefabricated column through the shear-resistant piece, and the anti-bending bottom rib is fixed to the side portion of the lower prefabricated column; the upper prefabricated column is supported on the lower prefabricated column through the in-column main reinforcements of the upper prefabricated column and / or the in-column main reinforcements of the lower prefabricated column. Connection of the upper prefabricated column and the lower prefabricated column is achieved through mutual supporting in the beam column joints, visual inspection can be achieved, and the problems that grouting sleeve prefabricated columns are not accurate in alignment, not full in grouting and difficult to detect are thoroughly solved.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated buildings, and in particular relates to a prefabricated column connection structure in beam-column joints. Background Technology

[0002] In prefabricated building beam-column joints, the connection technology of precast columns is a crucial link in ensuring project quality and safety. Traditionally, the grouting sleeve of the upper precast column is usually placed at the bottom, interlocked with the main reinforcement of the lower precast column, and then grouting is performed. However, this construction method has several problems: First, the alignment of the grouting sleeve of the upper precast column with the main reinforcement of the lower precast column is not precise enough, easily leading to deviations during concrete pouring; second, the interlocking gap between the grouting sleeve and the main reinforcement is insufficient, especially when the diameter of the lower precast column's main reinforcement is large (e.g., 25mm), making it difficult to achieve precise connection by bending or twisting the main reinforcement using traditional methods. This is not only inconvenient to construct but also easily affects the safety of the overall structure.

[0003] In view of the above, there is an urgent need to propose a prefabricated column connection scheme that is easy to plug in and visualized to overcome the shortcomings of the existing technology.

[0004] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to propose a prefabricated column connection structure that is easy to plug in and visually appealing.

[0006] To achieve this objective, this utility model first provides a precast column connection structure in a beam-column joint, including an upper precast column, a lower precast column, and a precast beam. A shear-resistant member is embedded at one end of the precast beam near the beam-column joint. The precast beam has at least one bending bottom reinforcement, a bending top reinforcement, and stirrups separated from the shear-resistant member along its length. The bending bottom reinforcement is embedded at the bottom of the precast beam, the bending top reinforcement is located in the post-cast composite surface layer of the precast beam, and the stirrups are connected to the bending top reinforcement and the bending bottom reinforcement. The precast beam is placed on top of the lower precast column via the shear-resistant member, and the bending bottom reinforcement is fixed to the side of the lower precast column. The upper precast column is supported by the main reinforcement within the upper precast column and / or the main reinforcement within the lower precast column.

[0007] Preferably, the shear-resistant member is located on the neutral axis of the precast beam.

[0008] Preferably, the main reinforcement bars inside the upper precast column and the main reinforcement bars inside the lower precast column are provided with anchors, and the anchors are located in the post-cast composite layer of the beam-column joint.

[0009] Preferably, a grouting sleeve is further included, and the column inner main reinforcement of the upper precast column and the column inner main reinforcement of the lower precast column are connected through the grouting sleeve.

[0010] Preferably, the grouting sleeve is located in the post-cast composite layer of the beam-column joint, and the column inner main reinforcement of the upper precast column and the column inner main reinforcement of the lower precast column are butt-joint supported through the grouting sleeve.

[0011] Preferably, the grouting sleeve is embedded in the lower precast column, and the column inner main reinforcement of the upper precast column is reversely inserted and supported on the grouting sleeve.

[0012] Preferably, a fixing seat is embedded in the lower precast column, and the anti-bending bottom reinforcement is directly or indirectly fixed to the fixing seat.

[0013] Preferably, a support is arranged between the precast beam and the lower precast column, one end of the support is embedded in the precast beam, the other end is fixed to the fixing seat, and the anti-bending bottom reinforcement extends out of the end of the precast beam and is connected to the support.

[0014] Preferably, the anti-bending bottom reinforcement is implemented as two rows arranged in an up-down manner; the anti-bending bottom reinforcement of the lower row is connected to the support; and the anti-bending bottom reinforcement of the upper row is fixed to the fixing seat through an adjusting threaded sleeve.

[0015] Preferably, the anti-bending bottom reinforcement is implemented as two rows arranged in an up-down manner; the anti-bending bottom reinforcement of the two rows arranged in an up-down manner is connected to the top surface and the bottom surface of the support, respectively.

[0016] The technical effects of the above technical solution of the utility model are derived from the following one or more combinations:

[0017] The connection of the upper precast column and the lower precast column is realized by mutual support in the beam-column joint in the application, and compared with the prior art of arranging a grouting sleeve at the bottom of the upper precast column, there is no visual blind area, which can be directly observed, and the problems of misalignment, insufficient grouting, and difficult detection of the grouting sleeve precast column are completely solved.

[0018] The anti-bending bottom reinforcement of the precast beam is connected to the side of the precast column, which avoids the construction difficulty problem caused by the spatial interference between the anti-bending bottom reinforcement and the main reinforcement of the precast column, and the anti-bending reinforcement can be realized by on-site threading, which has a high fault tolerance rate and can avoid the problem of beam-column reinforcement interference, thereby facilitating the construction. Further, the beam-column main reinforcement reduces the reinforcement interference, facilitates the connection of the upper precast column and the lower precast column, avoids the beam-column reinforcement interference, and has a large installation space.

[0019] The grouting sleeve is embedded in the lower precast column or located in the post-cast composite layer, the grouting sleeve can be grouted first, and then the main reinforcement of the upper precast column is inserted into the grouting sleeve, so that each grouting sleeve can be fully grouted.

[0020] The column inner main reinforcement of the upper precast column and the column inner main reinforcement of the lower precast column are provided with anchoring members, and then the upper precast column and the lower precast column are partially overlapped through the support of the plurality of main reinforcements in the post-cast laminated layer part of the beam-column joint, which is simple in construction and safe and reliable in structure.

[0021] The shear-resistant piece is arranged at the neutral axis of the precast beam with the maximum shear, and the bending-resistant top reinforcement and the bending-resistant bottom reinforcement separated from the shear-resistant piece are arranged at the top and the bottom; the shear-resistant piece is arranged at the middle part of the beam with the maximum shear, and the shear-resistant effect is good; the bending-resistant bottom reinforcement and the bending-resistant top reinforcement are separated, and are not related to the shear-resistant piece; the bending-resistant and shear-resistant separation is realized, the structural safety is better, and the stiffness mutation problem of the shear-resistant piece is not caused; furthermore, the shear-resistant piece can be placed on the precast column, and the connection of the bending-resistant bottom reinforcement and the precast column realizes the support-free precast beam; furthermore, the inner main reinforcement of the post-cast laminated layer of the beam-column joint and the shear-resistant piece can be completely constrained and wrapped, and the effect of the cast-in-place is realized.

[0022] The support (steel plate) welding mode is adopted to avoid the construction difficulty problem caused by the interference between the bending-resistant bottom reinforcement of the precast beam and the main reinforcement of the precast column; the bending-resistant top reinforcement of the precast beam adopts the on-site reinforcement penetrating mode, the on-site reinforcement penetrating fault tolerance is high, and the beam-column reinforcement interference problem can be avoided.

[0023] The lower row of bending-resistant bottom reinforcement is welded through the support, and one groove welding is used, which is more efficient and simpler in construction than the reinforcement welding by roots; the upper row of bending-resistant bottom reinforcement is adjusted through the adjusting threaded sleeve, the adjusting threaded sleeve and the pre-embedded steel plate (i.e. fixed seat) of the precast column are welded, the operation is simple, the fault tolerance is high, and the implementability is strong.

[0024] The bending-resistant bottom reinforcement of the precast beam is welded with the support, part of which is in the precast beam and part of which is in the cast-in-place section (i.e. post-cast laminated layer) of the beam-column joint, which is better in transmission transition effect than all in the precast beam and all in the cast-in-place section.

[0025] The support is sunk to the bottom surface of the precast beam to be flush, the effective calculation height of the precast beam is increased, the precast structure is superior to the cast-in-place structure, which is a unique method and advantage of the precast; the sinking of the support can also reserve more welding space for the adjusting threaded sleeve (straight threaded sleeve) of the upper row of bending-resistant bottom reinforcement, which is convenient for the welding of the adjusting threaded sleeve and the pre-embedded fixed seat (steel plate) of the precast column.

[0026] The stirrup in the post-cast laminated layer of the beam-column joint is made into an inverted U-shaped, the bottom is welded with the support, and a closed stirrup is formed to solve the stirrup anchoring problem of the bottom reinforcement of the precast beam in the cast-in-place section.

[0027] After the support is welded, a triangular anti-torsion force is formed with the shear-resistant piece as the vertex and the support as the bottom side, and the anti-torsion safety is good during the construction process. DETAILED DESCRIPTION

[0028] Figure 1The structure of the utility model is expressed.

[0029] Figure 2 The structure of the utility model is expressed.

[0030] Figure 3 The first prefabricated column connecting joint of the utility model is expressed.

[0031] Figure 4 The second prefabricated column connecting joint of the utility model is expressed.

[0032] Figure 5 The second prefabricated column connecting joint of the utility model is expressed.

[0033] Figure 6 The second prefabricated column connecting joint of the utility model is expressed.

[0034] Figure 7 The anti-bending bottom bar structure of the utility model is expressed.

[0035] Figure 8 The anti-bending bottom bar structure of the utility model is expressed. DETAILED DESCRIPTION

[0036] The following description is presented to enable any person skilled in the art to practice the present utility novel and to incorporate it into specific applications. Various modifications, and variations, as well as combinations of the described features, will be apparent to those skilled in the art and can be made without departing from the scope or spirit of the application. Thus, it is intended that the present utility novel not be limited to the particular embodiments disclosed herein, but that the claim and the specification be construed in accordance with the entire scope of the disclosure and the equivalents thereof.

[0037] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present utility novel. However, it will be apparent to one skilled in the art that the present utility novel can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present utility novel.

[0038] The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification, (including any accompanying claims, abstract, and drawings) can be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed in this specification is one example only of a generic series of equivalent or similar features.

[0039] It is noted that, where used, the terms left, right, front, back, top, bottom, over, under, clockwise and counterclockwise are used for convenience only and are not intended to imply any particular fixed direction. Indeed, they are used to reflect relative positions and / or orientations between various parts of the object. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0040] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] It is noted that, where used, further, preferably, further and more preferably are simple beginnings of another embodiment based on the foregoing embodiment, and the contents after the further, preferably, further or more preferably are combined with the foregoing embodiment as the complete structure of another embodiment. The further, preferably, further or more preferably after the same embodiment can be arbitrarily combined to constitute another embodiment.

[0042] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It is noted that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be understood as limiting the scope of protection of the present application.

[0043] Please combine Figures 1-8The embodiment provides a prefabricated column connecting structure in a beam-column joint, which comprises an upper prefabricated column 1b, a lower prefabricated column 1a and a prefabricated beam 2, the prefabricated beam 2 is embedded with a shear member 24 at one end close to the beam-column joint, the prefabricated beam 2 is provided with at least a bending-resistant bottom bar 22, a bending-resistant surface bar 21 and a stirrup 23 which are separated from the shear member 24 along the beam length direction, the bending-resistant bottom bar 22 is embedded at the bottom of the prefabricated beam 2, the bending-resistant surface bar 21 is located at a post-cast composite surface layer 20 of the prefabricated beam 2, and the stirrup 23 is connected to the bending-resistant surface bar 21 and the bending-resistant bottom bar 22; the prefabricated beam 2 is placed on the top of the lower prefabricated column 1a through the shear member 24, and the bending-resistant bottom bar 22 is fixed to the side of the lower prefabricated column 1a; and the upper prefabricated column 1b is supported on the lower prefabricated column 1a through the column inner main reinforcement 10b of the upper prefabricated column 1b and / or the column inner main reinforcement 10a of the lower prefabricated column 1a. The connection of the upper prefabricated column 1b and the lower prefabricated column 1a is realized by mutual support in the beam-column joint, compared with the prior art, the visual blind area is not provided, the connection can be directly observed, and the problems of misalignment, insufficient grouting and difficult detection of the prefabricated column with a grouting sleeve are solved.

[0044] The above technical scheme constitutes the necessity of the embodiment, and the following will be described in detail with reference to the drawings:

[0045] For the scheme that the upper prefabricated column 1b is supported on the lower prefabricated column 1a through the column inner main reinforcement 10b of the upper prefabricated column 1b and / or the column inner main reinforcement 10a of the lower prefabricated column 1a, the embodiment provides the following three implementation manners:

[0046] I. Please refer to Figure 3 Anchoring pieces are arranged on the column inner main reinforcement 10b of the upper prefabricated column 1b and the column inner main reinforcement 10a of the lower prefabricated column 1a, and the anchoring pieces are located in the post-cast composite layer 3 of the beam-column joint. Preferably, the anchoring pieces are steel anchoring plates 4, and a plurality of steel anchoring plates 4 are connected to the column inner main reinforcement 10b of the upper prefabricated column 1b and the column inner main reinforcement 10a of the lower prefabricated column 1a respectively and are located at the end positions of the main reinforcements in the post-cast composite layer 3 of the beam-column joint. A plurality of main reinforcements can directly support the upper prefabricated column 1b, and the main reinforcements have large sizes (generally, the diameter is 25 mm) and large numbers, so that the main reinforcements can provide large support strength. Preferably, the column inner main reinforcement 10b of the upper prefabricated column 1b and the column inner main reinforcement 10a of the lower prefabricated column 1a can be designed to be misaligned at the reinforcement positions facing the post-cast composite layer 3 of the beam-column joint when the prefabricated column is prefabricated in a factory, so that the prefabricated column is better supported.

[0047] II. Please refer to Figure 4The column inner main reinforcement 10b of the upper precast column 1b and the column inner main reinforcement 10a of the lower precast column 1a are connected through the grouting sleeve 12, specifically, the grouting sleeve 12 is embedded in the post-cast composite layer 3 of the beam-column joint, the column inner main reinforcement 10b of the upper precast column 1b and the column inner main reinforcement 10a of the lower precast column 1a are butt-jointed and supported through the grouting sleeve 12, and the whole connection is completed by pouring the post-cast composite layer 3 of the beam-column joint.

[0048] III. Please combine Figure 5 and Figure 6 The column inner main reinforcement 10b of the upper precast column 1b and the column inner main reinforcement 10a of the lower precast column 1a are connected through the grouting sleeve 12, specifically, the grouting sleeve 12 is embedded in the lower precast column 1a, and the column inner main reinforcement 10b of the upper precast column 1b is inserted and supported in the grouting sleeve 12, and the whole connection is completed by pouring the post-cast composite layer 3 of the beam-column joint.

[0049] In the embodiment, the upper precast column 1b, the lower precast column 1a and the precast beam 2 can be precast in a factory and hoisted on site. The upper precast column 1b and the lower precast column 1a are provided with reinforcement at the end facing the beam-column joint and extend in the post-cast composite layer 3 of the beam-column joint. The reinforcement at the bottom of the upper precast column 1b is connected to the steel reinforcement anchoring plate 4 at the bottom of the column inner main reinforcement 10b of the upper precast column 1b, and the reinforcement at the top of the lower precast column 1a is connected to the steel reinforcement anchoring plate 4 at the top of the column inner main reinforcement 10a of the lower precast column 1a. Alternatively, the column inner main reinforcement 10b of the upper precast column 1b and the column inner main reinforcement 10a of the lower precast column 1a are butt-jointed through the grouting sleeve 12. In this way, the structural requirements of the precast column in the first and second embodiments are achieved.

[0050] When the third embodiment is implemented, the grouting sleeve 12 is embedded at the top of the lower precast column 1a, and the upper precast column 1b is provided with reinforcement at the end facing the beam-column joint and is inserted in the grouting sleeve 12 of the lower precast column 1a for butt-joint support.

[0051] Please refer to Figures 5-8 The embodiment further includes the precast beam 2, which is provided with a shear-resistant member 24 at one end close to the beam-column joint. The precast beam 2 has at least a bending-resistant bottom reinforcement 22, a bending-resistant surface reinforcement 21 and a stirrup 23 separated from the shear-resistant member 24 along the length direction of the beam. The bending-resistant bottom reinforcement 22 is embedded in the bottom of the precast beam 2, the bending-resistant surface reinforcement 21 is located in the post-cast composite surface layer 20 of the precast beam 2, and the stirrup 23 is connected to the bending-resistant surface reinforcement 21 and the bending-resistant bottom reinforcement 22. The precast beam 2 is placed on the top of the lower precast column 1a through the shear-resistant member 24, and the bending-resistant bottom reinforcement 22 is fixed to the side of the lower precast column 1a.

[0052] Further, please refer to Figure 6, the lower precast column 1a is embedded with a fixed seat 11, and the anti-bending bottom bar 22 is directly or indirectly fixed to the fixed seat 11. The fixed seat 11 comprises a pair of pull rods embedded in the lower precast column 1a and a fixed plate connected to the end of the pair of pull rods, which is preferably a fixed steel plate. On the one hand, the anti-bending bottom bar 22 can be directly welded to the fixed plate; on the other hand, a support 25 is arranged between the precast beam 2 and the lower precast column 1a, one end of the support 25 is embedded in the precast beam 2, and the other end is fixed to the fixed seat 11, and the anti-bending bottom bar 22 extends outside the end of the precast beam 2 and is connected to the support 25 so as to be indirectly fixed to the fixed seat 11.

[0053] Specifically, the anti-bending bottom bar 22 is implemented as two rows arranged in upper and lower positions, the anti-bending bottom bar 221 of the lower row is connected to the support 25; and the anti-bending bottom bar 222 of the upper row is fixed to the fixed seat 11 through the adjusting threaded sleeve 26. Alternatively, the anti-bending bottom bar 22 is implemented as two rows arranged in upper and lower positions; and the anti-bending bottom bars 221, 222 arranged in upper and lower positions are respectively welded to the top surface and the bottom surface of the support 25.

[0054] Preferably, the support 25 is a steel plate, which is welded to the fixed plate of the fixed seat 11 through a bevel welding. Further, the anti-bending bottom bar 222 of the upper row is fixed to the fixed plate through the adjusting threaded sleeve 26, which is a commonly used straight threaded sleeve, and a thread is formed at the end of the anti-bending bottom bar 222, and the straight threaded sleeve is adjusted until it abuts against the fixed steel plate, and then welding is performed. The bottom surface of the support 25 is flush with the bottom surface of the precast beam 2, and a protective layer is formed between the anti-bending bottom bar 221 of the lower row and the bottom surface of the precast beam 2, and the end of the anti-bending bottom bar 221 of the lower row extends obliquely downward outside the precast beam 2 and is connected to the support 25, so that the anti-bending bottom bar 221 of the lower row extends downward outside, and the effective beam height of the precast beam 2 of the embodiment is larger than that of the conventional precast beam 2. The anti-bending bottom bar 22 of the lower row is welded through the support 25, and one bevel welding is used instead of welding each steel bar, which is more efficient and simpler to construct. The anti-bending bottom bar 222 of the upper row is adjusted through the adjusting threaded sleeve 26 to adjust the installation gap, and the adjusting threaded sleeve 26 and the fixed steel plate of the precast column are welded, which is simple to operate, adjustable, has a high fault tolerance, and is strong in implementability. Further, the support 25 is sunken to be flush with the bottom surface of the precast beam 2, which increases the effective calculation height of the precast beam 2, and is a unique method and advantage of precast structure for matching the cast-in-place structure; the sinking of the support 25 also reserves a larger welding space for the adjusting threaded sleeve 26 (straight threaded sleeve) of the anti-bending bottom bar 222 of the upper row, which facilitates the welding of the adjusting threaded sleeve 26 and the fixed steel plate of the precast column.

[0055] Alternatively, please refer to Figure 8 , Figure 8The precast beam 2 on the middle side adopts the anti-bending bottom reinforcement 22 which is implemented as two rows arranged in upper and lower. Specifically, the support 25 is fixed in the precast beam 2 at one end and fixed to the fixed plate of the fixed base 11 at the other end, and the lower row of anti-bending bottom reinforcement 221 is connected to the support 25. Preferably, the support 25 is a steel plate which is welded with the fixed steel plate of the fixed base 11 by bevel welding. And the two rows of anti-bending bottom reinforcement 221, 222 arranged in upper and lower are respectively connected to the top surface and the bottom surface of the support 25, and are fixed by welding at one time, which is more efficient.

[0056] Please combine Figure 5 、 Figure 7 and Figure 8 , the stirrup 23 of the precast beam 2 in the embodiment is arranged as a plurality of along the beam length direction; for the above two implementation manners, part of the stirrup 23 is located between the precast beam 2 and the precast column, and the stirrup 23 located between the precast beam 2 and the precast column is fixed to the support 25, as known from the above, the support 25 is a steel plate, so the stirrup 23 located between the precast beam 2 and the precast column can be directly welded to the support 25. After the support 25 is welded, a triangular anti-torsion force is formed with the shear member 24 as the vertex and the support 25 as the bottom side, and the construction process is safe against torsion. Further, please combine Figure 6 and Figure 7 , the stirrup 23 located between the precast beam 2 and the precast column is implemented as an inverted U-shaped, welded at the bottom and the support 25 to form a closed stirrup 23, solving the anchoring problem of the bottom reinforcement of the precast beam 2 in the cast-in-place section (i.e. the post-cast composite layer 3 of the beam-column joint), and an integral body can be formed through the support 25.

[0057] As a preferred embodiment of the embodiment, the shear member 24 is arranged at the neutral axis 200 of the precast beam, and the shear member 24 of the precast beam 2 is preferably a shear steel, and is further implemented as an H-shaped steel. A section of the shear steel is embedded in the precast beam 2 but is separated from and not connected to the anti-bending reinforcement 21, the anti-bending bottom reinforcement 22 and the stirrup 23, and the other end extends outward and is placed on the precast column and leveled by leveling shims. The stud 241 can also be provided on the web of the shear steel to improve the bolting strength with the post-cast composite layer 3.

[0058] The beneficial effects of the embodiment are:

[0059] The connection of the upper precast column 1b and the lower precast column 1a is achieved by mutual support in the beam-column joint in the present application, which has no visual blind area compared to the prior art method of setting a grouting sleeve 12 at the bottom of the upper precast column 1b, and can be directly observed, completely solving the problems of misalignment, insufficient grouting and difficult detection of the grouting sleeve 12 of the precast column.

[0060] The bottom anti-bending bar 22 of the precast beam 2 is connected to the side of the precast column, avoiding the construction difficulty problem caused by the spatial interference between the bottom anti-bending bar 22 and the main reinforcement of the precast column, while the anti-bending bar 21 can be installed by on-site threading, which has a high fault tolerance rate and can avoid the problem of beam-column steel interference, and can better facilitate construction. Further, the main reinforcement of the beam-column is reduced, which facilitates the connection between the upper precast column 1b and the lower precast column 1a, and avoids the beam-column steel interference, and has a large installation space.

[0061] The grouting sleeve 12 is embedded in the lower precast column 1a or in the post-cast composite layer 3, and the grouting sleeve 12 can be grouted first, and then the main reinforcement of the upper precast column 1b is inserted into the grouting sleeve 12, so that each grouting sleeve 12 can be fully grouted.

[0062] The main reinforcement 10b of the upper precast column 1b and the main reinforcement 10a of the lower precast column 1a are provided with anchor pieces, and then supported by multiple main reinforcements, so that the upper precast column 1b and the lower precast column 1a are partially overlapped in the post-cast composite layer 3 of the beam-column joint, which is simple to construct and safe and reliable in structure.

[0063] The anti-shear piece 24 is arranged at the neutral axis 200 of the precast beam 2 with the maximum shear, and the anti-bending top bar 21 and the anti-bending bottom bar 22 are arranged at the top and the bottom and separated from the anti-shear piece 24, so that the anti-shear piece 24 is located at the middle of the beam with the maximum shear, and has good anti-shear effect; the anti-bending of the bottom bar and the anti-bending of the top bar are separated and have no relationship with the anti-shear piece 24; the anti-bending and anti-shear are separated, the structure is safer, and the stiffness of the anti-shear piece 24 is not suddenly changed; further, the anti-shear piece 24 can be placed on the precast column, and the connection between the anti-bending bottom bar 22 and the precast column can realize the precast beam 2 without support; further, the main reinforcement in the post-cast composite layer 3 of the beam-column joint and the anti-shear piece 24 can be completely constrained and wrapped, and the effect of equivalent cast-in-place is realized.

[0064] The support 25 (steel plate) is welded to avoid the construction difficulty problem caused by the interference between the anti-bending bottom bar 22 of the precast beam 2 and the main reinforcement of the precast column; the anti-bending top bar 21 of the precast beam 2 is installed by on-site threading, which has a high fault tolerance rate and can avoid the problem of beam-column steel interference.

[0065] The lower anti-bending bottom bar 22 is welded through the support 25, and one groove welding is higher in efficiency and simpler in construction than the welding of each steel bar; the upper anti-bending bottom bar 222 is adjusted by the adjusting threaded sleeve 26 to adjust the installation gap, and the adjusting threaded sleeve 26 and the embedded steel plate (i.e. fixed seat) of the precast column are welded, which is simple to operate, adjustable, has a high fault tolerance rate, and is strong in implementability.

[0066] The anti-bending bottom bar 22 of the precast beam 2 is welded with the support 25, part of which is in the precast beam 2 and part of which is in the cast-in-place section (i.e. post-cast composite layer 3) of the beam-column joint, which has a better transition effect than the case where all of the anti-bending bottom bar 22 is in the precast beam 2 or in the cast-in-place section.

[0067] The support 25 is sunk to the bottom surface of the precast beam 2, the effective calculation height of the precast beam 2 is increased, the precast structure is superior to the cast-in-place structure, and it is a special method and advantage of the precast; the sinking of the support 25 can also reserve a larger welding space for the adjusting threaded sleeve 26 (straight threaded sleeve) of the upper row of anti-bending bottom bars 222, facilitating the welding of the adjusting threaded sleeve 26 and the pre-embedded fixing seat (steel plate) of the precast column.

[0068] The stirrup 23 in the post-cast composite layer 3 of the beam-column joint is made into an inverted U-shaped, the bottom and the support 25 are welded, a closed stirrup 23 is formed, and the anchoring problem of the bottom bar of the precast beam 2 in the stirrup 23 of the cast-in-place section is solved.

[0069] After the support 25 is welded, a triangular anti-torsion force is formed with the anti-shear member 24 as the top point and the support 25 as the bottom side, and the anti-torsion safety in the construction process is ensured.

[0070] Further, the above embodiment of the present application is described in detail in combination with the drawings, and those skilled in the art can make various changes to the present application according to the above description. Therefore, some details in the embodiments should not constitute a limitation on the present application, and the scope of protection of the present application is defined by the appended claims.

Claims

1. A precast column connection structure in a beam-column joint, characterized by, The precast beam is buried with a shear element at one end close to the beam-column joint, and has at least a bending-resistant bottom bar, a bending-resistant surface bar and a stirrup separated from the shear element along the beam length direction, the bending-resistant bottom bar is buried in the bottom of the precast beam, the bending-resistant surface bar is located in the post-cast composite surface layer of the precast beam, and the stirrup is connected to the bending-resistant surface bar and the bending-resistant bottom bar; the precast beam is placed on the top of the lower precast column through the shear element, and the bending-resistant bottom bar is fixed to the side of the lower precast column; the upper precast column is supported on the lower precast column through the column main reinforcement of the upper precast column and / or the column main reinforcement of the lower precast column.

2. The precast column connection in a beam column joint according to claim 1, wherein: The shear element is arranged on the neutral axis of the precast beam.

3. The precast column connection in a beam column joint according to claim 1, wherein: The column main reinforcement of the upper precast column and the column main reinforcement of the lower precast column are provided with anchor elements located in the post-cast composite layer of the beam-column joint.

4. The precast column connection in a beam column joint according to claim 1, wherein: The column main reinforcement of the upper precast column and the column main reinforcement of the lower precast column are connected through a grouting sleeve.

5. A precast column connection in a beam column joint as claimed in claim 4, wherein: The grouting sleeve is located in the post-cast composite layer of the beam-column joint, and the column main reinforcement of the upper precast column and the column main reinforcement of the lower precast column are butt-joint supported through the grouting sleeve.

6. The precast column connection in a beam column joint according to claim 4, wherein: The grouting sleeve is buried in the lower precast column, and the column main reinforcement of the upper precast column is inserted reversely and supported on the grouting sleeve.

7. The precast column connection in a beam column joint according to claim 1, wherein: The lower precast column is buried with a fixing seat, and the bending-resistant bottom bar is directly or indirectly fixed to the fixing seat.

8. A precast column connection in a beam column joint as claimed in claim 7, wherein: A support is arranged between the precast beam and the lower precast column, one end of the support is buried in the precast beam, the other end is fixed to the fixing seat, and the bending-resistant bottom bar extends out of the end of the precast beam and is connected to the support.

9. The precast column connection in a beam column joint according to claim 8, wherein: The bending-resistant bottom bar is implemented as two rows arranged in an up-down manner; the bending-resistant bottom bar of the lower row is connected to the support; and the bending-resistant bottom bar of the upper row is fixed to the fixing seat through an adjusting threaded sleeve.

10. The precast column connection in a beam column joint according to claim 8, wherein: The bending-resistant bottom bar is implemented as two rows arranged in an up-down manner; the bending-resistant bottom bar of the upper row and the bending-resistant bottom bar of the lower row are respectively connected to the top surface and the bottom surface of the support.

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