CN108755945A - A kind of prefabricated assembled concrete bean column node and its construction method - Google Patents

Abstract

The invention discloses a kind of prefabricated assembled concrete bean column node and its construction methods, wherein, a kind of prefabricated assembled concrete bean column node, including upper prop, lower prop, upper connector, lower connector and connecting plate, upper connector part is fixedly attached to upper prop, upper connector another part is stretched out to lower prop direction, and the upper connector of extension is fixedly connected with connecting plate；Lower connector part is fixedly attached to lower prop, and lower connector another part is stretched out to upper prop direction, and the lower connector of extension is fixedly connected with connecting plate.The present invention has the advantages that excellent in mechanical performance, production, storage, transport and simple and practicable, effectively save cost of constructing shorten the construction period.

Description

A prefabricated assembled concrete beam-column joint and its construction method

technical field

The invention relates to the field of construction, in particular to a prefabricated assembled concrete beam-column joint and a construction method thereof.

Background technique

With the sustained and rapid development of my country's economy, the process of urbanization is accelerating. In order to realize the sustainable development of urban and rural construction, it is proposed to change the urban and rural construction mode, promote the transformation and upgrading of the construction industry, and vigorously promote the "construction industrialization" as one of the top tasks. The prefabricated concrete structure meets the requirements of "building industrialization, housing industrialization" and green buildings. This type of structure has the advantages of fast construction speed, guaranteed quality, energy saving, environmental protection and good durability, and has a very broad development prospect. The core technology of prefabricated concrete structures is the joint connection structure of precast concrete beams and precast concrete columns, and its quality directly affects the ultimate bearing capacity and seismic performance of such structures. However, how to construct a new type of beam-column joint connection structure with good mechanical performance, reasonable structural measures, and convenient construction has always been a technical difficulty for prefabricated concrete structures.

Existing prefabricated beam-column joints generally use sleeves to connect the column bars and beam bars. The extruder required for the sleeve connection is relatively heavy, and the construction process is labor-intensive. If the equipment is not well maintained, oil leakage will easily pollute the steel bars and affect the effectiveness. Play normally. In addition, this method also has problems such as slow connection speed and high cost. There are also methods in which the beam connection nodes are set outside the column, and the column is prefabricated as a whole, and the prefabricated steel member is used to protrude from the column edge to connect with the prefabricated beam. However, the protruding steel members in this connection method will cause the column surface to be uneven, which increases the difficulty of transportation and storage of prefabricated columns.

Contents of the invention

Aiming at the technical problems existing in the prior art, the object of the present invention is to provide a prefabricated assembled concrete beam-column joint and a construction method thereof.

The purpose of the present invention is achieved through the following technical solutions: a prefabricated assembled concrete beam-column node, including an upper column, a lower column, an upper connector, a lower connector and a connecting plate, the upper connector part is fixedly connected to the upper column, the upper The other part of the connector protrudes toward the downward column, and the upper connector of the protruding part is fixedly connected with the connecting plate; The connecting piece is fixedly connected with the connecting plate.

Preferably, the upper connecting piece is an upper angle steel, the lower connecting piece is a lower angle steel, the connecting plate is a plate or a pouring space coaming that encloses a pouring space, and the two side plates of the upper angle steel and the lower angle steel are respectively fixed by the plate connected; or, the upper angle steel and the lower angle steel are respectively arranged at the corners of the coaming plate of the pouring space, and the two side plates of the upper angle steel and the lower angle steel are respectively fixed to the coaming plate of the pouring space.

Preferably, the two side plates of the upper angle steel and the lower angle steel are respectively connected to the plate or the coaming plate of the pouring space by welding or bolting.

Preferably, the positions of the two side plates of the upper angle steel and the lower angle steel are staggered from the bolt connection positions.

Preferably, an upper longitudinal rib is buried in the upper column along the extending direction of the upper column, and one end of the upper longitudinal rib is fixedly connected with the upper connector, and a lower longitudinal rib is buried in the lower column along the extending direction of the upper column, and one end of the lower longitudinal rib is connected with the lower connector Fixed connection.

Preferably, the fixed connection part of the upper connector and the upper column is embedded in the upper column and fixedly connected with the upper longitudinal rib, and the fixed connection part of the lower connector and the lower column is embedded in the lower column and fixedly connected with the lower longitudinal rib.

Preferably, it also includes a beam, and the end surface of the lower column corresponding to the access position of the bottom bar of the beam is provided with a bottom bar positioning groove for the bottom bar to access;

When there are more than two beams, the protruding positions of the bottom bars of each beam are staggered;

The bottom reinforcement of the beam extends from the beam into the pouring space, and the bottom reinforcement in the pouring space has an extension section and a vertically arranged strengthening connection section;

The upper part of the beam has a cast-in-place concrete layer, and stirrups are evenly distributed in the cast-in-place concrete layer, and top bars are fixed on the stirrups, and the top bars pass through the two beams.

A construction method for prefabricated assembled concrete beam-column joints. When prefabricating the upper column and the lower column, the upper connector and the lower connector are respectively buried on the surface where the upper column and the lower column meet, and the upper connector part extends toward the lower column. Out of the upper column, the lower connector part protrudes from the lower column in the direction of the upper column;

During construction, the beam is erected on the lower column, the upper column is hoisted above the lower column, and the protruding parts of the upper connector and the lower connector are respectively fixed to each connecting plate to pour the pouring space.

Preferably, when the upper column and the lower column are prefabricated, the upper longitudinal reinforcement is buried in the upper column along the extension direction of the upper column, and one end of the upper longitudinal reinforcement is fixedly connected with the upper connector, and the lower longitudinal reinforcement is embedded in the lower column along the extension direction of the lower column. Rib, fixedly connect one end of the lower longitudinal rib with the lower connecting piece.

Preferably, when the lower column is prefabricated, a positioning groove for the bottom rib is provided on the end face of the lower column corresponding to the access position of the bottom rib of the beam;

When the beam is erected on the lower column, the bottom reinforcement of the beam is connected to the positioning groove of the bottom reinforcement. If there are multiple beams erected, the bottom reinforcement of each beam is staggered;

The upper part of the beam has a concrete cast-in-place layer space, and stirrups are evenly distributed in the space of the concrete cast-in-place layer. Top bars are tied on the stirrups. The space is filled with concrete to form a concrete cast-in-place layer;

When prefabricating the beam, the bottom reinforcement is buried along the extension direction of the beam, the bottom reinforcement part is protruded from the beam, and the end of the bottom reinforcement protruding from the beam part is vertically bent to form a reinforced connection section;

When there are more than two beams to be erected, the bottom bars of the protruding parts of each beam should be staggered.

Compared with the prior art, the present invention has the following advantages and effects:

1. The present invention has the advantages of excellent mechanical properties, and its production, storage, transportation and construction are all simple and easy, effectively saving costs and shortening the construction period.

2. The bottom reinforcement of the beam of the present invention is not connected, which saves the process of connecting the bottom reinforcement and improves the construction speed; the bottom reinforcement is inserted into the pouring space to a certain depth and then bent upwards to ensure the anchorage of the bottom reinforcement and improve the ductility of the joint; both sides of the pouring space The staggered arrangement of the bottom bars prevents the bottom bars at the same position between the beams from colliding together, ensuring smooth construction and increasing the construction speed.

3. The top bar of the present invention is bound at the construction site, and then poured to form a concrete cast-in-place layer, which simplifies the process of top bar connection, increases the integrity of the structure, and improves the deformation resistance of the joints.

4. In the present invention, a positioning groove for the bottom reinforcement is provided on the top of the lower column, and the bottom reinforcement is placed in the positioning groove for the bottom reinforcement during construction to realize rapid positioning of the beam and improve the construction speed.

5. The upper column and the lower column of the present invention are fixedly connected by bolts to the upper connector and the lower connector, and the upper connector and the lower connector can use equilateral angle steel. It can be seen that the present invention does not need to use large-scale mechanical construction, and the construction environment and The technical requirements of the operator are not high, and the quality of the connection between the upper connector and the lower connector is guaranteed, so that the construction speed can be improved and the cost can be saved. The upper connecting piece and the lower connecting piece are connected by bolts so that the upper column and the lower column are connected, which can reduce the amount of concrete poured on site, thereby increasing the construction speed.

6. The present invention can increase the construction speed and save labor costs, and the cost is lower than other connection methods, and has good economic benefits.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the prefabricated assembled concrete beam-column joint of the present invention;

Fig. 2 is the structural representation of upper column of the present invention;

Fig. 3 is the structural representation of lower column of the present invention;

Fig. 4 is the structural representation of another embodiment of the prefabricated concrete beam-column joint of the present invention;

Fig. 5 is a schematic structural view of another embodiment of the prefabricated concrete beam-column joint of the present invention;

Fig. 6 is a structural schematic diagram of the connection of two oppositely arranged beams of the present invention;

Fig. 7 is a schematic structural view of the beam of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Fig. 1 is the structural representation of an embodiment of the prefabricated assembled concrete beam-column joint of the present invention; A kind of prefabricated assembled concrete beam-column joint comprises upper column 1, lower column 2, upper connector 3, lower connector 4 and connection The upper connecting piece 3 is fixedly connected to the upper column 1, and the other part of the upper connecting piece 3 protrudes in the direction of the lower column 2, and the upper connecting piece 3 of the protruding part is fixedly connected to the connecting plate; the lower connecting piece 4 is fixedly connected to the The other part of the lower column 2 and the lower connector 4 protrude toward the upper column 1, and the lower connector 4 of the protruding part is fixedly connected with the connecting plate.

Preferably, as shown in Figure 2 or Figure 3, the upper connecting piece 3 is an upper angle steel, the lower connecting piece 4 is a lower angle steel, and the connecting plate is a plate 18 or a pouring space coaming 6 that encloses a pouring space, and the upper angle steel and the two side plates of the lower angle steel are fixedly connected by plate 18; or, the upper angle steel and the lower angle steel are respectively arranged at the corners of the coaming plate 6 of the pouring space, and the two side plates of the upper angle steel and the lower angle steel are respectively fixed to On the pouring space coaming plate 6.

For example, Fig. 4 is a structural schematic diagram of another embodiment of the prefabricated concrete beam-column joint of the present invention; four upper angle steels are set at the four corners of the upper column 1, and four lower angle steels are set at the four corners of the lower column 2. Angle steel, and the upper angle steel and the lower angle steel are all set correspondingly, adopt 8 plates 18, one side plate of each upper angle steel and lower angle steel is fixedly connected to a plate 18 respectively, and the other side plate of each upper angle steel and lower angle steel One side plate is fixedly connected to the other plate 18 respectively, so as to stably connect the upper column 1 and the lower column 2 .

For example, Fig. 5 is a structural schematic diagram of another embodiment of the prefabricated concrete beam-column joint of the present invention; a rectangular pouring space is formed by four pouring space hoardings 6, and four upper angle steels are set on the upper column 1, 4 The four upper angle steels correspond to the four corners of the rectangular pouring space. Since the two side plates of the upper angle steel are arranged in an "L" shape, the two side plates of the upper angle steel can be attached to the two casting space coaming plates 6 at the corners. Then the upper angle steel and the pouring space coaming plate 6 are fixedly connected by bolts 17 . Similarly, 4 lower angle steels are set on the lower column 2, and the 4 lower angle steels correspond to the four corners of the rectangular pouring space. Since the two side plates of the lower angle steel are set in an "L" shape, the two side plates of the lower angle steel can be Attach to the two pouring space coaming plates 6 at the corner, and then fix the lower angle steel and the pouring space coaming plate 6 through bolts 17 . It should be noted that in special cases, the pouring space can be made into a pentagon or hexagon, etc., and the two side plates of the upper angle steel and the lower angle steel can be adjusted at corresponding angles to adapt to corners with different angles. It fits well on the two pouring space enclosures 6 at the corner, so as to be fixed, and will not be described one by one here.

Preferably, the two side plates of the upper angle steel and the lower angle steel are fixedly connected to the plate 18 or the pouring space coaming plate 6 by welding or bolts 17 respectively.

Preferably, the positions where the two side plates of the upper angle steel and the lower angle steel are connected with the bolts 17 are staggered.

Specifically, the two side plates of the upper angle steel and the lower angle steel are respectively provided with through holes 16 for bolts 17 to pass through. After the holes 16 are staggered, the bolts 17 are staggered in the height direction, so as to ensure the smooth connection of the bolts 17 .

Preferably, as shown in Fig. 2 or Fig. 3, an upper longitudinal rib 7 is embedded in the upper column 1 along the extension direction of the upper column 1, and one end of the upper longitudinal rib 7 is fixedly connected with the upper connector 3, and the lower column 2 is fixed along the upper column 1. A lower longitudinal rib 8 is buried in the extending direction, and one end of the lower longitudinal rib 8 is fixedly connected with the lower connecting piece 4 .

Preferably, as shown in Figure 2 or Figure 3, the fixed connection part between the upper connector 3 and the upper column 1 is buried in the upper column 1 and fixedly connected with the upper longitudinal rib 7, and the fixed connection part between the lower connector 4 and the lower column 2 is embedded into the lower column 2 and fixedly connected with the lower longitudinal rib 8. Specifically, the ends of the upper longitudinal rib 7 are overlapped with the upper connector 3, and the upper longitudinal rib 7 and the upper connector 3 are overlapped and partially fixedly connected by welding. Compared with the existing steel bar extrusion sleeve The advantage of the connection technology is that it can be connected without the use of large-scale mechanical construction, and it also greatly improves the construction speed and saves costs.

Preferably, as shown in Figure 1 and Figure 3, it also includes a beam, and the end face of the lower column 2 corresponding to the access position of the bottom rib 9 of the beam 11 is provided with a bottom rib positioning groove 10 for the bottom rib 9 to access; the beam is erected to When the lower column 2 is put on, the bottom reinforcement 9 of the beam is put into the bottom reinforcement positioning groove 10, which can realize the rapid positioning and installation of the beam, reduces the difficulty of installation and greatly improves the work efficiency at the same time.

As shown in Figure 4 or Figure 5, when more than two beams are provided, the positions where the bottom ribs 9 of each beam protrude from the beams are staggered; The positions are staggered, and when the two beams are set at 90°, the position that the bottom rib 9 protrudes can also be staggered in the height direction. The present invention makes the bottom ribs 9 of each beam staggered, avoids the bottom ribs 9 at the same position between the beams from colliding together, and is convenient for actual construction.

Fig. 6 is a structural schematic diagram of the connection of two oppositely arranged beams according to the present invention. The bottom rib 9 of the beam passes through the beam and extends into the pouring space 5. The bottom rib 9 in the pouring space 5 has an extension section 12 and an erected strengthening connection section 13 (as shown in FIG. 7 ). After the middle is filled with concrete, the reinforced connecting section 13 can greatly strengthen the tensile performance of the beam, avoiding the need for welding connection or sleeve connection of the bottom reinforcement 9, and at the same time ensuring the anchorage of the bottom reinforcement 9 and improving the ductility of the joint;

The upper part of the beam has a concrete cast-in-place layer, and the stirrups 14 are evenly distributed in the concrete cast-in-place layer, and the top bars 15 are fixed on the stirrups 14, and the top bars 15 run through the two beams (the top bars 15 are not broken in the middle) . For example, when two beams are arranged oppositely, a part of the top rib 15 can be fixed (bound) on each stirrup 14 of one beam, and the other part is then fixed (bound) on each stirrup 14 of the opposite beam. After completion, cement is filled to form a concrete cast-in-place layer, which can increase the integrity of the structure and improve the deformation resistance of the joints.

This example is a construction method of prefabricated concrete beam-column joints. Specifically, when the upper column 1 and the lower column 2 are prefabricated, the upper connector 3 and the lower connector are respectively buried on the surfaces where the upper column 1 and the lower column 2 meet. Part 4, part of the upper connector 3 protrudes from the upper column 1 in the direction of the lower column 2, and part of the lower connector 4 protrudes from the lower column 2 in the direction of the upper column 1;

During construction, the beam is erected on the lower column 2, the upper column 1 is hoisted above the lower column 2, the extension parts of the upper connector 3 and the lower connector 4 are respectively fixed on each connecting plate, and the pouring space 5 is poured.

Preferably, when the upper column 1 and the lower column 2 are prefabricated, the upper longitudinal rib 7 is embedded in the upper column 1 along the extension direction of the upper column 1, and one end of the upper longitudinal rib 7 is fixedly connected with the upper connector 3, and in the lower column 2 Embed the lower longitudinal reinforcement 8 along the extending direction of the lower column 2, and connect one end of the lower longitudinal reinforcement 8 with the lower connecting piece 4 fixedly.

Preferably, when the lower column 2 is prefabricated, the bottom rib positioning groove 10 is provided on the end surface of the lower column 2 corresponding to the access position of the bottom rib 9 of the beam;

When the beam is erected on the lower column 2, the bottom rib 9 of the beam is connected to the bottom rib positioning groove 10. If there are multiple beams to be erected, the bottom rib 9 of each beam is staggered;

The upper part of the beam has a concrete cast-in-place layer space, and stirrups 14 are evenly distributed in the concrete cast-in-place layer space, and the top bars 15 are bound on the stirrups 14, and the top bars 15 penetrate the two beams. After the top bars 15 are bound, Filling concrete in the cast-in-place concrete layer space to form a cast-in-place concrete layer;

When the beam is prefabricated, the bottom reinforcement 9 is buried along the extension direction of the beam, the bottom reinforcement 9 is partially protruded from the beam, and the end of the bottom reinforcement 9 protruding from the beam part is vertically bent to form a reinforced connection section 13;

When there are more than two beams to be erected, the bottom ribs 9 of the protruding parts of each beam are staggered.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (10)

1. A prefabricated assembled concrete beam-column node, characterized in that it includes an upper column, a lower column, an upper connector, a lower connector and a connecting plate, the upper connector part is fixedly connected to the upper column, and the other part of the upper connector is connected to the upper column. Protrude in the direction of the lower column, and the upper connector of the protruding part is fixedly connected with the connecting plate; part of the lower connector is fixedly connected to the lower column, and the other part of the lower connector protrudes in the direction of the upper column, and the lower connector of the protruding part is connected with the connecting plate Fixed connection. 2. The prefabricated concrete beam-column joint according to claim 1, wherein the upper connecting piece is an upper angle steel, the lower connecting piece is a lower angle steel, and the connecting plate is a plate or a pouring space enclosing a pouring space For the coaming, the two side plates of the upper angle steel and the lower angle steel are respectively fixed and connected by plates; or, the upper angle steel and the lower angle steel are respectively arranged at the corners of the coaming plate of the pouring space, and the two side plates of the upper angle steel and the lower angle steel They are respectively fixed to the pouring space coaming. 3. The prefabricated concrete beam-column joint according to claim 2, characterized in that the two side plates of the upper angle steel and the lower angle steel are respectively connected to the plate or the pouring space coaming by welding or bolting. 4. The prefabricated concrete beam-column joint according to claim 3, characterized in that the positions of the two side plates of the upper angle steel and the lower angle steel and the bolt connections are staggered. 5. The prefabricated concrete beam-column node according to any one of claims 1-4, characterized in that an upper longitudinal reinforcement is embedded in the upper column along the extension direction of the upper column, and one end of the upper longitudinal reinforcement is fixedly connected with the upper connector, A lower longitudinal rib is buried in the lower column along the extension direction of the upper column, and one end of the lower longitudinal rib is fixedly connected with the lower connecting piece. 6. The prefabricated concrete beam-column joint according to claim 5, characterized in that, the fixed connection part between the upper connector and the upper column is buried in the upper column and fixedly connected with the upper longitudinal reinforcement, and the lower connector is fixed with the lower column The connecting part is buried in the lower column and fixedly connected with the lower longitudinal reinforcement. 7. The prefabricated concrete beam-column node according to claim 1, characterized in that it also includes a beam, and the end face of the lower column corresponding to the access position of the bottom bar of the beam is provided with a bottom bar positioning groove for the bottom bar to access ; When there are more than two beams, the protruding positions of the bottom bars of each beam are staggered; The bottom reinforcement of the beam extends from the beam into the pouring space, and the bottom reinforcement in the pouring space has an extension section and a vertically arranged strengthening connection section; The upper part of the beam has a cast-in-place concrete layer, and stirrups are evenly distributed in the cast-in-place concrete layer, and top bars are fixed on the stirrups, and the top bars pass through the two beams. 8. A construction method for prefabricated assembled concrete beam-column joints, characterized in that, when the upper column and the lower column are prefabricated, an upper connector and a lower connector are respectively buried on the surface where the upper column and the lower column are connected, and the upper connector Part of it protrudes from the upper column in the direction of the lower column, and part of the lower connector protrudes from the lower column in the direction of the upper column; During construction, the beam is erected on the lower column, the upper column is hoisted above the lower column, and the protruding parts of the upper connector and the lower connector are respectively fixed to each connecting plate to pour the pouring space. 9. The construction method of prefabricated concrete beam-column joints according to claim 8, characterized in that, when the upper column and the lower column are prefabricated, the upper longitudinal reinforcement is buried in the upper column along the extension direction of the upper column, and the upper longitudinal reinforcement One end is fixedly connected with the upper connector, the lower longitudinal reinforcement is embedded in the lower column along the extension direction of the lower column, and one end of the lower longitudinal reinforcement is fixedly connected with the lower connector. 10. The construction method of prefabricated concrete beam-column joints according to claim 8, characterized in that, when the lower column is prefabricated, the bottom rib positioning groove is provided on the end face of the lower column corresponding to the bottom rib access position of the beam; When the beam is erected on the lower column, the bottom reinforcement of the beam is connected to the positioning groove of the bottom reinforcement. If there are multiple beams erected, the bottom reinforcement of each beam is staggered; The upper part of the beam has a concrete cast-in-place layer space, and stirrups are evenly distributed in the space of the concrete cast-in-place layer. Top bars are tied on the stirrups. The space is filled with concrete to form a concrete cast-in-place layer; When prefabricating the beam, the bottom reinforcement is buried along the extension direction of the beam, the bottom reinforcement part is protruded from the beam, and the end of the bottom reinforcement protruding from the beam part is vertically bent to form a reinforced connection section; When there are more than two beams to be erected, the bottom bars of the protruding parts of each beam should be staggered.