CN209211619U - Prefabricated reinforced concrete beam-column joint structure - Google Patents

Abstract

The utility model discloses a prefabricated assembled reinforced concrete beam-column connection node structure. It includes a reinforced concrete column and at least one reinforced concrete beam, and the connecting parts are poured with ultra-high performance concrete. The outstanding features of the prefabricated reinforced concrete beam-column joint based on ultra-high performance concrete proposed by the utility model are that it can shorten the construction period to a great extent, simplify the construction operation of the joint, and improve the bearing capacity of the joint and the energy dissipation capacity of the overall frame. It can be used in various building systems and has broad application prospects.

Description

Prefabricated reinforced concrete beam-column joint structure

technical field

The utility model belongs to the technical field of building structures, in particular to a prefabricated assembled reinforced concrete beam-column connection node structure.

Background technique

Since the structural components of the prefabricated structure are processed by the workshop factory, compared with the cast-in-place concrete structure, the amount of cast-in-place work is greatly reduced; and the prefabricated structure can adopt the method of integrated design and construction of construction and decoration, which greatly shortens the construction period , reduces the cost, and contributes to the promotion of construction industrialization. Although the prefabricated monolithic frame structure has many advantages, there are many technical problems at the connection nodes in the actual construction process. For the prefabricated monolithic frame, the beam-column connection node is the key to the construction. At present, the prefabricated beam-column The connection of steel bars in column joints mostly adopts mechanical connection, sleeve grouting connection and welding connection. The mechanical connection of steel bars is to transfer the force in one steel bar to another steel bar through the mechanical bite of the steel bar and the connector, which is an effective connection form. However, this connection method cannot guarantee the quality of the connectors during on-site construction. The matching rate between the steel bars and the pre-processed connectors in the factory is extremely low, and it is difficult to ensure the stability of the internal force transmission in the steel bar connection. Sleeve grouting connection is to use a high-strength circular sleeve with concave and convex parts inside to insert the steel bar to be connected in two sections, and then inject micro-expansion composed of cement, fine aggregate, expansion agent and water reducing agent by the grouting machine. High-strength grouting material, when the grout hardens, the sleeve and steel bars are firmly combined into a whole. However, in the actual construction process, the number of sleeves and the closed appearance are not conducive to quality inspection, and the sleeve butt joint is complicated, and the amount of grouting cannot be controlled, which makes the construction process consume a lot of time and labor costs. Welding connection is to use electric welding equipment to lengthen the steel bars in the axial direction or cross-connect them. However, the internal stress of the welded steel bars will be uneven, resulting in greater brittleness and hardness of the steel bars. Special equipment and energy are required for on-site operations. It consumes a lot, easily pollutes the environment, and has high requirements for the construction environment.

The above-mentioned traditional connection node methods often have problems such as complex structure, unclear force transmission, and many construction procedures. This requires the development of new easy-to-connect prefabricated reinforced concrete frame connection nodes in order to give full play to the advantages of prefabricated structures.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a prefabricated assembled reinforced concrete beam-column connection node structure.

The technical scheme of the utility model is as follows:

Prefabricated reinforced concrete beam-column joint structure, including

A reinforced concrete column, whose cross section is rectangular, and at least one outer wall surface of its upper part is provided with a plurality of columns extending steel bars;

At least one reinforced concrete beam, at least one end of which is provided with a plurality of beam end overhanging reinforcement corresponding to the above-mentioned plurality of column overhanging reinforcement;

The diameters of the above-mentioned number of column overhanging steel bars and the above-mentioned number of beam end overhanging steel bars are the same, and they are overlapped with each other and wrapped around a number of stirrups to form a connection part. 8 times the diameter of the steel bar and the above-mentioned number of beam end extension steel bars, and the effective anchorage length of the above-mentioned number of column extension steel bars and the above-mentioned number of beam end extension steel bars is not less than the above-mentioned number of column extension steel bars and the above-mentioned number of beam ends 23 times the diameter of the overhanging steel bars; the above connection parts are poured with ultra-high performance concrete.

In a preferred embodiment of the present utility model, the effective anchorage lengths of the several column overhanging steel bars and the several beam end overhanging steel bars are not less than the number of column overhanging steel bars and the several beam end overhanging bars. 25 times the diameter of the bar.

Further preferably, the effective anchorage lengths of the plurality of column extension bars and the plurality of beam end extension bars are not less than 30 times the diameters of the number of column extension bars and the number of beam end extension bars.

In a preferred embodiment of the present utility model, the length of the mutual dislocation overlap is not less than 10 times the diameter of the plurality of column overhanging steel bars and the number of beam end overhanging steel bars

In a preferred embodiment of the present utility model, the four side walls of the upper part of the reinforced concrete column are all provided with the plurality of externally extending steel bars of the column.

The beneficial effects of the utility model are:

1. In terms of construction, the utility model avoids complex connection forms of nodes, and greatly speeds up the construction progress of beam-column connection nodes.

2. In terms of component quality, this utility model adopts ultra-high performance concrete to pour nodes, because its own compressive strength is greater than 150Mpa and tensile strength is greater than 15Mpa, so under the action of an earthquake, the plastic hinge first appears in the distance The ductility and energy dissipation capacity of the frame structure are improved on the regional beams of the joints.

3. The outstanding features of the prefabricated reinforced concrete beam-column joint based on ultra-high performance concrete proposed by the utility model are that it can shorten the construction period to a great extent, simplify the construction operation of the joint, and improve the bearing capacity of the joint and the energy consumption of the overall frame. It can be used in various building systems and has broad application prospects.

Description of drawings

Fig. 1 is a structural schematic diagram of uncast ultra-high performance concrete in the construction process of the utility model.

Fig. 2 is a partially exploded perspective view of the temporary support member in the present invention.

Detailed ways

The technical solutions of the present utility model will be further illustrated and described below through specific embodiments in conjunction with the accompanying drawings.

As shown in FIG. 1 , a prefabricated reinforced concrete beam-column joint structure includes a reinforced concrete column 1 and at least one reinforced concrete beam 2 .

A reinforced concrete column 1, the cross section of which is rectangular, and the four outer walls of its upper part are provided with a plurality of column extension steel bars 10;

Four reinforced concrete beams 2, at least one end of which is provided with a plurality of beam end overhanging reinforcement bars 20 corresponding to the above-mentioned plurality of column overhanging reinforcement bars 10;

The diameters of the above-mentioned several columns extending steel bars 10 and the above-mentioned several beam end extending steel bars 20 are the same, and they are overlapped with each other and wrapped around several stirrups 3 to form a connection part 4, and the length of the above-mentioned mutual displacement overlap is not less than the above-mentioned 10 times the diameter of several columns extending steel bars 10 and the above several beam ends extending steel bars 20, and the effective anchorage length of the above several column extending steel bars 10 and the above several beam end extending steel bars 20 is not less than the above several columns 25 times (non-seismic structure), preferably not less than 30 times (seismic structure) of the diameter of the stretched steel bars 10 and the externally extended steel bars 20 at the ends of the above-mentioned beams; It is greater than 150MPa, and the tensile strength is greater than 15MPa, so that when the beam and column in the frame structure are damaged, it can ensure that the damage at the node lags behind other components, so that the plastic hinge generated by the beam and column failure is far away from the node position, and the ductility of the frame structure is improved. and energy consumption.

The construction method of the above-mentioned prefabricated assembled reinforced concrete beam 2-column connection node structure comprises the following steps:

(1) As shown in Figures 1 and 2, two temporary support members 5 are set below the plurality of column extension steel bars 10 on the top of the reinforced concrete column 1 as the positioning and installation of the four reinforced concrete beams 2 Platform, each temporary support member 5 includes two supporting angles 50 and four connecting rods 51 connecting the two supporting angles 50, the cross section of the supporting angles 50 is a right triangle, corresponding to the two ends of the side walls of the right angles along the The length direction of the supporting angle steel 50 extends to form two outwardly extending flange plates 501, and each outwardly extending flange plate 501 has a threaded hole 5011, and the two ends of the above-mentioned connecting rod 51 have external holes that fit the above-mentioned threaded hole 5011. Screw threads 510; the side walls with the above-mentioned outstretched flange plates 501 of the above-mentioned two support angle steels 50 are respectively corresponding to the relative two outer walls of the reinforced concrete column 1, and are respectively connected with the external threads 510 at the two ends of the above-mentioned four connecting rods 51 The threaded holes 5011 of the outstretched flange plates 501 of the above-mentioned two supporting angle steels 50 are fastened by connecting bolts 52 adapted to the external threads 510, so that the two supporting angle steels 50 have The side walls are respectively in close contact with the two opposite outer walls of the reinforced concrete column 1;

(2) The four reinforced concrete beams 2 are hoisted and positioned, and the mutual dislocation laps of the plurality of column overhanging reinforcement bars 10 and the plurality of beam end overhanging reinforcement bars 20 are carried out and the plurality of stirrup bars 3 are wrapped around the plurality of stirrup bars 3 to forming said connection site 4;

(3) Wood formwork is installed at the connection part 4 to avoid grout leakage during pouring;

(5) Pour ultra-high-performance concrete at the connection part 4 and perform maintenance. After the strength requirement is reached, remove the wooden formwork and the temporary support member 5, and the process is completed.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited accordingly, that is, the equivalent changes and modifications made according to the patent scope of the utility model and the contents of the specification should still belong to Within the scope covered by the utility model.

Claims (5)

1. Prefabricated assembled reinforced concrete beam-column connection node structure, characterized in that: including A reinforced concrete column, whose cross section is rectangular, and at least one outer wall surface of its upper part is provided with a plurality of columns extending steel bars; At least one reinforced concrete beam, at least one end of which is provided with a plurality of beam end overhanging reinforcement corresponding to the above-mentioned plurality of column overhanging reinforcement; The diameters of the above-mentioned number of column overhanging steel bars and the above-mentioned number of beam end overhanging steel bars are the same, and they are overlapped with each other and wrapped around a number of stirrups to form a connection part. 8 times the diameter of the steel bar and the above-mentioned number of beam end extension steel bars, and the effective anchorage length of the above-mentioned number of column extension steel bars and the above-mentioned number of beam end extension steel bars is not less than the above-mentioned number of column extension steel bars and the above-mentioned number of beam ends 23 times the diameter of the overhanging steel bars; the above connection parts are poured with ultra-high performance concrete. 2. The prefabricated reinforced concrete beam-column joint structure according to claim 1, characterized in that: the effective anchorage lengths of the plurality of column extension steel bars and the number of beam end extension reinforcement bars are not less than the number of 25 times the diameter of the column overhanging steel bars and the number of beam end overhanging steel bars. 3. The prefabricated reinforced concrete beam-column joint structure as claimed in claim 2, characterized in that: the effective anchorage lengths of the plurality of column extension steel bars and the number of beam end extension reinforcement bars are not less than the number of 30 times the diameter of the column overhanging steel bars and the number of beam end overhanging steel bars. 4. The prefabricated reinforced concrete beam-column joint structure as claimed in claim 1, characterized in that: the length of the mutual dislocation overlap is not less than the number of column overhanging steel bars and the number of beam ends overhanging 10 times the diameter of the bar. 5. The prefabricated reinforced concrete beam-column connection structure according to any one of claims 1 to 4, characterized in that: the upper four side walls of the reinforced concrete column are provided with the plurality of outer columns Stretch steel bars.