CN218757991U - Connecting structure of precast beam and precast column - Google Patents

Abstract

The utility model discloses a connecting structure of a precast beam and a precast column, wherein the end part of the precast beam is provided with a beam end connecting piece, the precast column is provided with a column connecting plate, the beam end connecting piece is provided with an end plate and a web plate, the end plate is connected with the precast column by adopting a first bolt component, and the column connecting plate is connected with the web plate by adopting a second bolt component; grouting material is poured into the beam end grouting area, the joint of the prefabricated column and the prefabricated beam is corresponding, and rough surfaces combined with the grouting material are arranged on the end face of the prefabricated beam and the side surface of the prefabricated column. The utility model discloses need not to set up interim support when site operation, do not have the wet operation of concrete, can avoid taking traditional construction measures, reduce the operating expenses for construction cycle.

Description

Connecting structure of precast beam and precast column

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the assembled structure.

[ background of the invention ]

At present, for an assembly type concrete frame structure, a common frame column adopts a single-layer prefabricated column, a frame beam adopts a superposed beam, and the frame beam and the frame column realize rigid connection through a post-cast node. The integral frame structure for assembling of post-cast of the node area is equivalent to a cast-in-place structure in terms of stress performance, and is good in anti-seismic performance, but in field construction, wet operation is more, more temporary supports need to be arranged below beams and plates, so that the assembling degree and the industrialization level are still not high, the adverse effect on the environment is large, and the advantages of the assembled structure cannot be fully exerted.

For the low multi-layer concrete frame structure, because the floor standardization degree is lower, the traditional assembled integral frame structure can generate the problems of low construction efficiency, high cost, complex construction measures and the like which are more prominent. For a low multi-layer fabricated concrete structure, in addition to a traditional node post-cast fabricated integral frame structure, the standard 'fabricated multi-layer concrete structure technical specification' T/CECS 604-2019 of the standardization institute of engineering construction of China gives basic design requirements of a dry-type connected fabricated structure mainly based on bolt connection and welding, and gives a typical bolt connection frame structure form provided with brackets. However, the bolt connection in the standard has the following problems:

1) The bracket is arranged to provide a supporting condition for the precast beam end, so that the precast column protrudes outwards, and particularly when the bracket is required to be arranged on three sides or four sides of the precast column, the production process of the precast column is complex and the precast column is inconvenient to transport;

2) The vertical shearing force of the beam end is resisted by the bracket extending outwards from the prefabricated column, but the bracket can only bear the vertical downward shearing force and cannot bear the vertical upward shearing force, and a reliable shearing mechanism is not provided for a structure with the vertical upward shearing force at the beam end under the action of earthquake or wind load;

3) A connector for tie-beam indulges muscle and precast column, it all sets up to need every muscle of indulging, to indulging the more roof beam of muscle quantity, the connector of adoption is more, causes to arrange and install the difficulty, and the cost is also on the high side.

[ Utility model ] content

The technical problem to be solved in the utility model is to provide a bolted connection structure of precast beam and precast post, the construction process that can solve traditional wet-type joint construction existence is complicated, need to establish interim support and template, the big problem of wet work volume.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a connection structure of a precast beam and a precast column is characterized in that a beam end connecting piece is arranged at the end part of the precast beam, a column connecting plate is arranged at the connection part of the precast column and the precast beam, the beam end connecting piece is provided with an end plate and a web plate, the end plate is connected with the precast column through a first bolt assembly, and the column connecting plate is connected with the web plate through a second bolt assembly; the area between the end face of the precast beam and the side face of the precast column is a beam end grouting area, grouting material for coating the beam end connecting piece, the column connecting piece, the first bolt assembly and the second bolt assembly is poured into the beam end grouting area, rough surfaces combined with the grouting material are arranged on the end face of the precast beam and the side surface of the precast column corresponding to the joint of the precast column and the precast beam; the column connecting plate is connected with the prefabricated column through the embedded part.

Preferably, the beam-ends connecting piece still includes upper flange plate, lower flange plate and the web of parallel and the level setting from top to bottom, the web is connected perpendicularly between upper flange plate and lower flange plate, and first end plate is connected perpendicularly to the upper flange plate, and the second end plate is connected perpendicularly to the lower flange plate, is connected with the floor perpendicularly between upper flange plate and the first end plate, is connected with the floor perpendicularly between lower flange plate and the second end plate.

Preferably, two first ribbed slabs are arranged between the first end plate and the upper surface of the upper flange plate, two second ribbed slabs are arranged between the first end plate and the lower surface of the upper flange plate, two third ribbed slabs are arranged between the second end plate and the lower surface of the lower flange plate, and two fourth ribbed slabs are arranged between the second end plate and the upper surface of the lower flange plate.

Preferably, the area of the web plate far away from the end plate is embedded in the precast beam and is vertically provided with a welding nail.

Preferably, the upper flange plate and the lower flange plate are locally embedded in the precast beam and welded with the longitudinal ribs in the precast beam.

Preferably, a web bolt hole is formed in the area, close to the end plate, of the web, and the web bolt hole is a horizontal long round hole.

Preferably, the prefabricated column is provided with an embedded sleeve at a position corresponding to the first bolt assembly.

Preferably, for the side node, the embedded sleeve is anchored in the prefabricated column through an anchoring rod; for the middle joint, the embedded sleeves on two sides of the prefabricated column are connected through the opposite pull rods.

According to the technical scheme adopted by the utility model, in the construction stage, the precast beam is connected with the column connecting plate through the web plate of the beam end connecting piece and the bolt of the column connecting plate, so that reliable supporting is realized, and the beam end shearing force is borne by the column connecting plate; meanwhile, the end plate of the beam end connecting piece is connected with the prefabricated column through the first bolt assembly, so that the beam end connecting piece can bear tension and pressure simultaneously, and the prefabricated beam and the prefabricated column form a temporary rigid connection structure, namely can bear bending moment of a beam end. That is to say, when grouting is not performed in the beam end grouting area or the strength of grouting material does not meet the design requirement, the temporary rigid connection structure formed by the precast columns and the precast beams can support the precast beams, the beam end shearing force and the beam end bending moment are transmitted, the stress requirements of the structure under the action of gravity load and wind load in the construction stage can be met through design calculation, and the construction safety is ensured;

in the using stage, the strength of the grouting material in the beam end grouting area reaches the design requirement, the connection area of the precast beam and the precast column can be guaranteed to be larger in rigidity and higher in bearing capacity than the area outside the connection area through calculation during design, so that strong connection is guaranteed, the precast beam forms a plastic hinge outside the connection area under the earthquake action, the plastic hinge range is still a reinforced concrete section, the ductility and the energy consumption capacity of the precast beam are equal to those of a cast-in-place structure, and the whole structure is guaranteed to have good earthquake resistance.

Therefore, the utility model has the advantages of as follows:

(1) Temporary supports are not needed to be arranged during site construction, concrete wet operation is not needed, traditional construction measures can be avoided, construction cost is reduced, and construction period is shortened;

(2) The adopted beam-end connecting piece integrates the functions of supporting, connecting and shearing resistance, realizes 'one device and multiple functions', and avoids the problems of more quantity, difficult arrangement and higher cost of the traditional steel bar connector;

(3) The beam column is in temporary rigid connection in the construction stage, can completely resist the action of gravity load and wind load, and effectively ensures the construction safety.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with the following drawings:

fig. 1 is a three-dimensional schematic view of a connection structure of a precast beam and a precast column according to an embodiment of the present invention;

FIG. 2a is a three-dimensional schematic view of a beam-end connector;

FIG. 2b is a front view of a beam-end connector;

FIG. 3a is a front view of a connection structure of an edge node precast beam and a precast column;

FIG. 3b isbase:Sub>A detailed view of section A-A of FIG. 3base:Sub>A;

FIG. 3c is a detail view of section B-B of FIG. 3 a;

FIG. 4 is a front view of a connection structure of a middle-node precast beam and a precast column;

fig. 5 is a schematic view of a precast beam end grouting area.

Reference numerals: the prefabricated beam comprises a prefabricated beam 100, a beam longitudinal rib 101, a beam stirrup 102, a prefabricated column 200, an embedded sleeve 201, an anchor rod 202, an embedded part 203, a tie rod 204, a beam end connecting piece 1, an upper flange plate 11, a lower flange plate 12, a first end plate 13, a second end plate 14, an end plate bolt hole 131, a web 15, a web bolt hole 151, a welding nail 152, a first rib plate 16, a second rib plate 17, a third rib plate 18, a fourth rib plate 19, a column connecting plate 2, a first bolt assembly 3, a first nut 31, a second nut 32, a short screw rod 33, a second bolt assembly 4 and grouting material 300.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without making creative efforts, which all belong to the protection scope of the present invention.

It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

To low multilayer assembled frame structure, be 2 ~ 3 layers as the form of a lesson based on the prefabricated post, provide a novel bolted connection structure and construction method of precast beam and prefabricated post, through the utility model discloses, not only solved the construction process that traditional wet-type joint structure and construction method exist complicated, need establish interim support and template, wet work volume big scheduling problem, also can solve the not convenient for component production, the atress mechanism of having had that dry-type joint structure and construction method exist, the more and higher scheduling problem of cost of connector quantity.

Referring to fig. 1, the utility model provides a bolted connection structure of precast beam 100 and precast column 200, precast beam 100 tip set up beam-ends connecting piece 1, and precast column 200 sets up column connection board 2 with precast beam connection position, and precast beam 100 realizes bolted connection through first bolt assembly 3 and second bolt assembly 4 with precast column 200.

Wherein beam-ends connecting piece is at the mill preparation, and when the precast beam of preparation, pre-buried in precast beam, promptly with precast beam formation whole. The column connector is typically connected to the prefabricated column after the prefabricated column is formed. In fig. 1, the precast beams are shown on only one side of the precast column, and when the precast column has beams on the other side, the beams and the precast column may be connected using the same connection structure as shown in fig. 1.

Referring to fig. 2a and 2b, the beam-end connector 1 is composed of an upper flange plate 11, a lower flange plate 12, a web 15, a first end plate 13, a second end plate 14, two first rib plates 16, two second rib plates 17, two third rib plates 18 and two fourth rib plates 19, has connecting, supporting and shearing resisting functions, and can be integrally welded and fixed into a whole. The thicknesses of the upper flange plate 11 and the lower flange plate 12 are calculated and determined according to the number of the longitudinal ribs at the end of the precast beam and the bending bearing capacity requirement of connection, and are not less than 12mm. The thickness of the web 15 is calculated and determined according to the requirements of the bending bearing capacity, the shearing bearing capacity and the like of the beam end connection, and is not less than 10mm; a web bolt hole 151 is formed in the area, close to the end plate, of the web 15, the web bolt hole 151 is a horizontal long round hole, and the size of the long round hole is comprehensively determined according to the size requirement and the installation deviation adjusting requirement of the second bolt assembly 4; the welding nails 152 are arranged on the area of the web 15 far away from the end plate, and the number and the size of the welding nails 152 are determined by calculation according to the anchoring stress requirement of the web 15 in the precast beam 100. The widths of the first end plate 13 and the second end plate 14 are respectively the same as those of the upper flange plate 11 and the lower flange plate 12, and the thicknesses of the first end plate and the second end plate are calculated and determined according to the stress requirements of the first bolt assembly 3; set up end plate bolt hole 131 on the end plate, the diameter of end plate bolt hole 131 should be 5mm bigger than the diameter of the short screw in first bolt assembly 3 at least to make things convenient for the screw rod installation and guarantee that the screw rod only bears pulling force, pressure, and does not bear the shear force. Two first ribbed plates 16 set up side by side and perpendicular welding between first end plate 13 and upper flange plate 11 upper surface, two second ribbed plates 17 set up side by side and perpendicular welding between first end plate 13 and upper flange plate 11 lower surface, two third ribbed plates 18 set up and perpendicular welding between second end plate 14 and lower flange plate 12 lower surface, two fourth ribbed plates 19 set up and perpendicular welding between second end plate 14 and lower flange plate 12 upper surface, the thickness of each ribbed plate should be calculated according to first bolt assembly 3's atress requirement and confirm, and be not less than 6mm.

Referring to fig. 3a, 3b and 3c, a beam longitudinal rib 101 and a beam stirrup 102 are arranged in a precast beam 100, an upper flange plate 11 and a lower flange plate 12 of a beam end connecting piece 1 extending into the precast beam 100 are respectively welded with the beam upper longitudinal rib and the beam lower longitudinal rib, when the beam longitudinal ribs are in two rows, the beam end connecting piece is respectively welded with the upper surface and the lower surface of the flange plate, the welding requirement is in accordance with the requirement of lap welding of a steel bar and a steel plate, when a double-sided welding seam is adopted, the lap length is not less than 5 times of the diameter of the steel bar, when a single-sided welding seam is adopted, the lap length is not less than 10 times of the diameter of the steel bar, and the length of the beam end connecting piece 1 extending into the precast beam 100 is in accordance with the stress requirement and is not less than 150mm; the welding nails 152 on the web 15 need to be located entirely within the precast beam 100. The end face of the precast beam 100 at the joint is provided with a rough surface, and the concave-convex depth of the rough surface is not less than 6mm.

Further, pre-embedded sleeves 201 are arranged on the prefabricated columns at positions corresponding to the first end plate 13, the second end plate 14 and the first bolt assembly 3 of the beam-end connecting piece, and the specifications of the pre-embedded sleeves 201 are matched with the specifications of the short screws 33 in the first bolt assembly 3; the embedded sleeve 201 is reliably anchored in the prefabricated column 200 through an anchoring rod 202, and the anchoring rod 202 can adopt a steel bar with an anchoring plate or a hook, and can also adopt a screw with an end head and the like; the side surface of the joint of the precast column 200 and the precast beam 100 is provided with a rough surface, and the concave-convex depth of the rough surface is not less than 6mm.

Further, a column connecting plate 2 is arranged on the precast column 200 at a position corresponding to the web 15 of the beam-end connecting piece, and the thickness of the column connecting plate 2 is calculated and determined according to the requirement of the shear bearing capacity of the beam end and is not less than 10mm; a bolt hole corresponding to the second bolt assembly 4 is formed in the column connecting plate 2, the bolt hole is a standard round hole, and the specification of the bolt hole is matched with that of the bolt of the second bolt assembly 4; the column connecting plate 2 is connected with the precast column 200 through an embedded part 203.

Further, the first bolt assembly 3 is composed of a short screw 33, a first nut 31 and a gasket, and a second nut 32 and a gasket, the specification of the short screw 33 should be determined by calculation according to the beam-end bending bearing capacity requirement, the short screw 33 passes through an end plate bolt hole 131 of the beam-end connecting piece, and is screwed into the embedded sleeve 201; gaps are reserved among the first end plate 13, the second end plate 14 and the embedded sleeve 201, and the width of the gaps is not less than 30mm; the first nut 31 and the gasket are arranged in the gap and are tightly contacted and fastened with the end plate; and a second nut 32 and a gasket are arranged at one end of the short screw 33 close to the precast beam and are tightly contacted and fastened with the end plate.

Furthermore, the second bolt assembly 4 consists of a common bolt, a matched nut and a gasket, and the number and specification of the bolts are calculated and determined according to the requirement of the shear bearing capacity of the beam end; the second bolt assemblies 4 are positioned and fastened in the web bolt holes 151 of the beam end connector web and the corresponding bolt holes on the column connection plates.

Referring to fig. 4, for the middle node, compared with the edge node, the precast beams 100 on both sides of the precast column 200 have the same structure, except that the pre-embedded sleeves 201 on both sides of the precast column 200 are connected by the counter-pull rods 204, that is, the counter-pull rods 204 are used instead of the anchor rods 202, the material of the counter-pull rods 204 is the same as that of the anchor rods, reinforcing steel bars or screw rods can be used, and threads are required for screwing both ends into the pre-embedded sleeves.

Referring to fig. 5, a region between an end surface of the precast beam 100 end and a side surface of the precast column 200 is a beam end grouting region, and the beam end connection member 1, the column connection plate 2, the first bolt assembly 3, and the second bolt assembly 4 are all exposed in this region when the precast beam 100 is installed. After the precast beam 100 is installed in place and the first bolt assembly 3 and the second bolt assembly 4 are installed and fastened, the beam end grouting area is densely filled with the high-strength grouting material 300.

The construction method matched with the precast beam and precast column bolt connection structure specifically comprises the following steps:

firstly, hoisting the precast beam 100 to the height of the precast column 200, and then horizontally moving the precast beam 100 to enable the web plates 15 of the beam end connecting pieces 1 at the two ends of the precast beam to be in contact with the column connecting plates 2 of the connected precast columns, wherein the bolt holes on the web plates are in one-to-one correspondence;

then, installing a second bolt assembly 4, namely, penetrating bolts through corresponding bolt holes on the beam-end connecting piece web 15 and the column connecting plate 2, and fastening by adopting gaskets and nuts; in the installation process, because the web bolt holes 151 are horizontal long round holes, the manufacturing deviation of the precast beam 100 can be eliminated through small-amount movement, and the precast beam 100 is ensured to be installed in place;

then, installing the first bolt assembly 3, namely screwing the short screw 33 into the embedded sleeve 201, and installing the first nut 31 and the gasket at the same time; after the short screw 33 is screwed into place, the second nut 32 and the gasket are installed; simultaneously fastening the first nut 31 and the gasket, and fastening the second nut 32 and the gasket; for a plurality of groups of first bolt assemblies 3 at the connecting position, fastening is performed sequentially from top to bottom preferentially, and then compensation and screwing are performed respectively after one round of fastening is completed, so that the fastening reliability is ensured;

and finally, after all the bolt connecting parts are reliably connected, erecting a template around the exposed area of the beam end, pouring high-strength grouting material 300 into the area, standing for 24 hours, and removing the template to finish the connection construction of the precast beam and the precast column.

The utility model can realize that the precast beam and the precast column form a temporary rigid connection structure in the construction stage, and various loads in the construction stage can be borne without arranging a bracket and a temporary support, thereby realizing the support-free construction and effectively improving the construction efficiency; and meanwhile, grouting materials are poured into local areas of beam ends, so that strong connection is realized, and the structure is guaranteed to have good anti-seismic performance in the use stage, so that the precast beams and the precast columns are safely and efficiently connected, and the advantages of the assembled structure in the aspects of improving quality and benefits, saving energy and reducing emission are fully exerted.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims (8)

1. A connection structure of a precast beam and a precast column is characterized in that a beam end connecting piece is arranged at the end part of the precast beam, a column connecting plate is arranged at the connection part of the precast column and the precast beam, the beam end connecting piece is provided with an end plate and a web plate, the end plate is connected with the precast column through a first bolt assembly, and the column connecting plate is connected with the web plate through a second bolt assembly; the area between the end face of the precast beam and the side face of the precast column is a beam end grouting area, grouting material for coating the beam end connecting piece, the column connecting piece, the first bolt assembly and the second bolt assembly is poured into the beam end grouting area, rough surfaces combined with the grouting material are arranged on the end face of the precast beam and the side surface of the precast column corresponding to the joint of the precast column and the precast beam; the column connecting plate is connected with the prefabricated column through the embedded part.

2. The connecting structure of the precast beam and the precast column according to claim 1, wherein the beam end connecting member further comprises an upper flange plate, a lower flange plate and a web plate, which are arranged in parallel and horizontally up and down, the web plate is vertically connected between the upper flange plate and the lower flange plate, the upper flange plate is vertically connected with the first end plate, the lower flange plate is vertically connected with the second end plate, a rib plate is vertically connected between the upper flange plate and the first end plate, and a rib plate is vertically connected between the lower flange plate and the second end plate.

3. A connecting structure of a precast beam and a precast column according to claim 2, wherein two first ribs are provided between the first end plate and the upper surface of the upper flange plate, two second ribs are provided between the first end plate and the lower surface of the upper flange plate, two third ribs are provided between the second end plate and the lower surface of the lower flange plate, and two fourth ribs are provided between the second end plate and the upper surface of the lower flange plate.

4. A connecting structure of a precast beam and a precast column according to claim 3, wherein the area of the web plate far away from the end plate is embedded in the precast beam and is vertically provided with welding nails.

5. A connecting structure of a precast beam and a precast column according to claim 3, wherein the upper flange plate and the lower flange plate are partially embedded in the precast beam and welded to the longitudinal ribs in the precast beam.

6. A connecting structure of a precast beam and a precast column according to claim 1, wherein a web bolt hole is provided in a region of the web near the end plate, and the web bolt hole is a horizontally long circular hole.

7. The connection structure of the precast beam and the precast column according to claim 1, wherein a pre-embedded sleeve is provided at a position of the precast column corresponding to the first bolt assembly.

8. The connecting structure of the precast beam and the precast column according to claim 7, wherein for the edge node, the embedded sleeve is anchored in the precast column through an anchor rod; for the middle joint, the embedded sleeves on two sides of the prefabricated column are connected through the opposite pull rods.

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