CN114753489A - Prefabricated beam column node and novel assembled reinforced concrete building thereof - Google Patents

Prefabricated beam column node and novel assembled reinforced concrete building thereof Download PDF

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Publication number
CN114753489A
CN114753489A CN202210668740.7A CN202210668740A CN114753489A CN 114753489 A CN114753489 A CN 114753489A CN 202210668740 A CN202210668740 A CN 202210668740A CN 114753489 A CN114753489 A CN 114753489A
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column
precast
connecting part
prefabricated
steel bar
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CN114753489B (en
Inventor
梁梓豪
梁伟桥
龚超
张素梅
姚志东
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Central Research Institute of Building and Construction Co Ltd MCC Group
China Jingye Engineering Corp Ltd
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Central Research Institute of Building and Construction Co Ltd MCC Group
China Jingye Engineering Corp Ltd
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Publication of CN114753489A publication Critical patent/CN114753489A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • E04B1/215Connections specially adapted therefor comprising metallic plates or parts

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention provides a prefabricated beam-column joint and a novel assembly type reinforced concrete building thereof, and relates to the technical field of constructional engineering, wherein the prefabricated beam-column joint comprises a column connecting part used for being connected with a prefabricated column and a beam connecting part used for being connected with a prefabricated beam; the column connecting part and the beam connecting part are arranged vertically; a connecting steel plate is embedded in the column connecting part, an outward extending section of the connecting steel plate extends out of the end face of the column connecting part, and a connecting end plate is arranged at the end part of the outward extending section; the beam connecting part is internally embedded with beam steel bars, the outer side section of each beam steel bar extends out of the end face of the beam connecting part, and the end part of the outer side section is provided with a beam anchoring plate. The invention has the advantages of simple structure, convenient use, high component prefabricating degree, simple structure of the connecting node, high site construction efficiency, less site wet operation and low construction cost.

Description

Prefabricated beam column node and novel assembled reinforced concrete building thereof
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a prefabricated beam column joint and a novel assembly type reinforced concrete building thereof.
Background
At present, the construction industry is one of the pillars of national economic industry of China, and makes great contribution to the economy of China, however, the construction industry of China also faces severe practical problems at present, and the problems mainly comprise low production efficiency, serious resource waste, prominent construction waste and the like. Therefore, the country reforms the construction industry and promotes the development of the building industrialization of China, and the building industrialization is closely related to the fabricated building.
Compared with the traditional cast-in-place building, the fabricated building has the advantages of high production efficiency, less construction waste, good component quality and the like. As the residential building has great domestic demand, the development of the prefabricated house conforms to the demand of social development. From the structural form, the prefabricated residential buildings can be divided into a prefabricated frame structure, a prefabricated shear wall structure, a prefabricated frame-shear wall structure and the like. The assembly type frame structure consists of beams, column members and connecting nodes thereof, and the beams and the column members have regularity in geometry, so that the assembly type frame structure is suitable for batch production in a prefabricated factory. Meanwhile, the frame structure has the advantages of flexible space separation, light dead weight, material saving, capability of being matched with the plane arrangement of the building more flexibly and the like, so the assembled frame structure has great application potential in the field of residential buildings in China.
The assembled reinforced concrete frame structure is provided with column-column connecting nodes, beam-beam connecting nodes and beam-column connecting nodes, and the connecting nodes form all prefabricated parts into a whole, so that the connecting performance of the nodes often determines the bearing capacity, the structural rigidity, the seismic performance and the like of the whole structure. For the connection of column-column joints and beam-beam joints, the forms of grouting sleeves or constraint slurry anchors and the like are mostly adopted in the engineering of China to connect the reinforcing steel bars among the components. However, since the sleeve grouting belongs to concealed engineering, the grouting quality is difficult to be effectively monitored, and therefore, the connection performance of the node cannot be guaranteed.
In addition, grout sleeve or restraint thick liquid anchor connection technology require highly to prefabricated component machining precision, require extremely high to the site operation precision, often appear in the engineering because the reinforcing bar leads to it can't penetrate the telescopic condition to the counterpoint deviation. The connection of beam-column joints can be divided into wet connection and dry connection of post-cast joints. For wet type connection of node post-pouring, bottom rib anchoring type connection is adopted in Chinese engineering, namely, a pre-buried longitudinal rib at the bottom of a precast beam extends to a node core area to be anchored, a longitudinal rib at the top of the beam is constructed on site, and the beam-column connection node is formed after concrete is poured on site in the node area. The connection form easily causes the blockage of the reinforcing steel bars in the core area of the node, and influences the connection quality of the node. As for the dry type connection form of the node, there are a prestressed crimping connection, a prestressed hybrid connection, and a dry type connection node composed of a pin, a bolt, a steel plate welding, a mechanical connection, and the like. These dry-type connection techniques require tensioning of the tendon, or field welding, etc., which increases the field construction process, complicates the construction process, and is not conducive to the improvement of the construction efficiency and the reduction of the construction cost.
Disclosure of Invention
The invention aims to provide a prefabricated beam-column joint and a novel assembly type reinforced concrete building thereof, so as to solve at least one technical problem in the prior art.
In order to solve the technical problem, the invention provides a precast beam column node which is used for being connected with a precast beam and a precast column simultaneously, wherein the precast beam column node comprises a column connecting part used for being connected with the precast column and a beam connecting part used for being connected with the precast beam;
the column connecting part and the beam connecting part are arranged vertically;
a connecting steel plate is embedded in the column connecting part, an outward extending section of the connecting steel plate extends out of the end face of the column connecting part, and a connecting end plate is arranged at the end part of the outward extending section;
the beam connecting part is internally embedded with beam steel bars, the outer side section of each beam steel bar extends out of the end face of the beam connecting part, and the end part of the outer side section is provided with a beam anchoring plate.
Wherein, the connecting steel plate on the column connecting part and the connecting end plate are in T-shaped vertical fixed connection. The area of the connecting end plate is about 1/3-1/4 of the section of the column connecting part.
Furthermore, the prefabricated beam column node is T-shaped, L-shaped or cross-shaped;
when the prefabricated beam-column joint is T-shaped, the prefabricated beam-column joint comprises one column connecting part and two beam connecting parts, or two column connecting parts and one beam connecting part;
when the prefabricated beam column node is L-shaped, the prefabricated beam column node comprises one column connecting part and one beam connecting part;
When the precast beam column node is in a cross shape, the precast beam column node comprises two column connecting parts and two beam connecting parts.
The prefabricated beam column node has flexible construction form, and can form T-shaped, L-shaped or cross-shaped node forms, thereby meeting different arrangement requirements in a frame structure system.
Furthermore, column reinforcing steel bars are buried in the column connecting parts, the outer sections of the column reinforcing steel bars extend out of the end faces of the column connecting parts, and column anchoring plates are arranged at the end portions of the outer sections.
Further, the length of the outside section of post reinforcing bar and the outside section of roof beam reinforcing bar is 150~250 mm.
Further, a bolt hole is formed in the connecting end plate.
Wherein, the area of the column anchoring plate is not less than 6 times of the sectional area of the column reinforcing steel bar; and similarly, the area of the beam anchoring plate is not less than 6 times of the sectional area of the beam reinforcing steel bar.
Further, stirrups are arranged on the peripheries of the column reinforcing steel bars and/or the beam reinforcing steel bars. The stirrup form can be rectangular stirrup, also can be spiral stirrup, and the stirrup plays the restraint effect to the overlap joint district concrete, can improve the anchoring performance of reinforcing bar in cast in situ concrete unit to improve steel bar connection joint biography power performance.
Furthermore, the beam anchoring plate and the column anchoring plate are respectively fixed on the beam reinforcing steel bars and the column reinforcing steel bars in a perforation plug welding or threaded connection mode.
Furthermore, a plurality of beam anchoring plates which are distributed at intervals along the axial direction are arranged on the outer side section of each beam steel bar;
and/or a plurality of column anchoring plates which are distributed at intervals along the axial direction are arranged on the outer section of each column reinforcing steel bar.
2-5 or more anchor plates are arranged along the axial direction of the steel bar, so that the anchoring performance of the steel bar can be further improved, and the force transmission performance of the indirect lap joint steel bar is further improved.
Further, the steel bar reinforced concrete beam also comprises beam spiral steel bars; one end of the beam spiral steel bar is embedded in the beam connecting part, and the other end of the beam spiral steel bar extends out of the end face of the beam connecting part and is sleeved outside the beam steel bar;
and/or, also includes column spiral reinforcing steel bar; post spiral reinforcement one end is pre-buried in the column connection portion, the post spiral reinforcement other end stretches out the terminal surface and the suit of column connection portion are in outside the post reinforcing bar.
Further, the device also comprises a beam outer sleeve; one end of the beam outer sleeve is embedded in the beam connecting part, and the other end of the beam outer sleeve extends out of the end face of the beam connecting part and is sleeved outside the beam reinforcing steel bar;
and/or, further comprising a column outer sleeve; the post outer tube one end is pre-buried in the post connecting portion, and the post outer tube other end stretches out the terminal surface and the suit of post connecting portion are in outside the post reinforcing bar.
Further, the outer sleeve is a steel pipe, a metal corrugated pipe or an FRP pipe.
In addition, this application still discloses a novel assembled reinforced concrete building that adopts above-mentioned precast beam column node.
Furthermore, in the height direction, column connecting parts of two adjacent precast beam column nodes are directly or indirectly connected;
and in the horizontal direction, the beam connecting parts of two adjacent precast beam-column nodes are directly or indirectly connected.
Furthermore, the prefabricated column component comprises a prefabricated column component, a connecting steel plate is embedded in the connecting end part of the prefabricated column component, the extending section of the connecting steel plate extends out of the connecting end part of the prefabricated column component, and the end part of the extending section is provided with a connecting end plate.
Furthermore, column steel bars are embedded in the connecting end portions of the prefabricated column components, the outer sections of the column steel bars extend out of the connecting end portions of the prefabricated column components, and column anchoring plates are arranged at the end portions of the outer sections.
That is, the structure of the connecting end portion of the prefabricated column member is substantially the same as that of the column connecting portion, so that the connection of the prefabricated column member with the column connecting portion of the prefabricated beam column node can be achieved.
When the prefabricated column component and the column connecting part or two column connecting parts are connected, the connecting end plates on the two butted parts are fixedly connected in a bolt or welding mode, column reinforcing steel bars on the prefabricated column component and the column connecting part are arranged in a staggered mode to form indirect lap joint, and concrete is poured afterwards to form a cast-in-place concrete unit.
When the column connecting part is provided with the stirrup, the spiral steel bar or the outer sleeve, the column steel bar on the prefabricated column component is inserted into the stirrup, the spiral steel bar or the outer sleeve and forms indirect lap joint with the column steel bar of the column connecting part in the stirrup, the spiral steel bar or the outer sleeve.
Furthermore, the beam anchoring structure further comprises a precast beam component, wherein beam steel bars are embedded in the connecting end part of the precast beam component, the outer side section of each beam steel bar extends out of the connecting end part of the precast beam component, and a beam anchoring plate is arranged at the end part of the outer side section.
When the precast beam components and the beam connecting parts or the two beam connecting parts are connected, beam reinforcing steel bars on the precast beam components and the beam connecting parts are arranged in a staggered mode to form indirect lap joint, and concrete is poured afterwards to form a cast-in-place concrete unit.
When the beam connecting part is provided with the stirrup, the spiral steel bar or the outer sleeve, the beam steel bar on the prefabricated beam component is inserted into the stirrup, the spiral steel bar or the outer sleeve and forms indirect lap joint with the beam steel bar of the beam connecting part in the stirrup, the spiral steel bar or the outer sleeve.
The steel bar anchoring plate can obviously improve the anchoring capacity of the steel bars in the cast-in-place concrete unit, so that the indirect lap joint length of the steel bars is reduced.
Preferably, the embedded part of the connecting steel plate is provided with a through hole, or a stud is welded, so that the shear connection key is formed with the concrete of the column connecting part.
Preferably, the cast-in-place concrete section adopts C30 or above grade concrete, can strengthen the adhesive action between reinforcing bar and the concrete, and then improves the indirect overlap joint force transmission performance of reinforcing bar.
Preferably, the beam-column connection node concrete cast-in-place section is located in a middle beam span of a frame, namely at a frame beam recurve position under the action of seismic load.
Preferably, the beam connection part has a length of a beam span 1/5 in one frame; the height of the post connecting part is 1/2 of the height of a post in one frame.
Under the action of seismic load, the stress of a beam-column joint area is complex, and the maximum bending moment and the shear force of the beam are generated on the end face of the beam instead of the midspan section; arranging connecting nodes between the beam units and the column units at the midspan positions of the structure, and keeping away from the beam-column node areas; the beam-beam connection node is applied to beam components mainly subjected to vertically and uniformly distributed loads, and the beam-beam connection node is arranged at a beam span 1/5 (a recurvation point), so that the design principle of strong connection and weak components is met.
Preferably, the precast beam element and/or the beam connection part is provided with a recess at the top.
The height of the notch is more than or equal to 50mm, and the precast beam component and/or the reinforcing steel bars in the hogging moment area at the top of the beam connecting part are constructed on site and can form a superposed beam structure with the plate component or the secondary beam component.
By adopting the technical scheme, the invention has the following beneficial effects:
the prefabricated beam column node and the novel assembly type reinforced concrete building thereof provided by the invention have the advantages of simple structure, convenience in use, high component prefabrication degree, simple structure of the connecting node, high site construction efficiency, less site wet operation and low construction cost.
Because the beam and column joints adopt the basic structural form of indirect lapping of the reinforcing steel bars and the construction method of casting concrete on site, no additional construction operation of grouting on site is needed, and grouting pore passages are not needed to be reserved in the prefabricated components, thereby not only saving the construction cost on site, but also reducing the processing cost of the prefabricated components.
The construction of the beam-column connecting joint of the novel assembly type reinforced concrete frame structure is carried out in the prefabricated processing factory, and the construction quality of a joint area can be guaranteed, so that the stress performance of the joint area is guaranteed, and the integral stress performance of the frame structure is facilitated.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the embodiments or prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a front view of a precast beam-column node provided in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the structure of the beam connection shown in FIG. 1;
FIG. 3 is a schematic view of the structure of the column connection part shown in FIG. 1;
FIG. 4 is a schematic structural view of the connection of two beam connecting portions in embodiment 1;
FIG. 5 is an exploded view of FIG. 4;
FIG. 6 is a schematic view showing a structure in which two column connecting parts are connected in example 1;
FIG. 7 is an exploded view of FIG. 6;
FIG. 8 is a block diagram of a first embodiment of a framework according to example 2 of the present invention;
FIG. 9 is a block diagram of a second embodiment of a framework according to example 2 of the present invention;
FIG. 10 is a schematic structural view of a beam connection node or a column connection node according to embodiment 3;
FIG. 11 is a schematic structural view of a beam connecting portion or a precast beam member in embodiment 4 of the present invention;
fig. 12 is a schematic structural view of a beam-column joint in embodiment 4 of the present invention;
fig. 13 is a perspective view of a reinforcing bar connecting structure in embodiment 5 of the present invention;
FIG. 14 is a schematic structural view of a first gusset plate according to embodiment 5 of the present invention;
fig. 15 is a perspective view of a reinforcing bar connecting structure in embodiment 6 of the present invention;
FIG. 16 is a schematic structural view of a first gusset of embodiment 6 of the invention;
fig. 17 is a perspective view of a second embodiment of a reinforcing bar connecting structure in example 6 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The present invention will be further explained with reference to specific embodiments.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a precast beam column node 100 for connecting a precast beam and a precast column at the same time, wherein the precast beam column node 100 includes a column connecting part 110 for connecting the precast column and a beam connecting part 120 for connecting the precast beam;
the column connection part 110 and the beam connection part 120 are arranged perpendicular to each other;
a connecting steel plate 111 is embedded in the column connecting part 110, an outward extending section of the connecting steel plate 111 extends out of the end face of the column connecting part 110, and a connecting end plate 112 is arranged at the end part of the outward extending section; the connecting end plate 112 is provided with bolt holes.
The beam connecting part 120 is embedded with beam reinforcements 121, the outer sections of the beam reinforcements 121 extend out of the end surface of the beam connecting part 120, and the end parts of the outer sections are provided with beam anchoring plates 122.
The connecting steel plate 111 and the connecting end plate 112 of the column connecting part 110 are vertically and fixedly connected in a T-shape. The area of the connecting end plate 112 is about 1/3-1/4 of the cross section of the post connecting portion 110.
The precast beam-column node 100 may be T-shaped, L-shaped, or cross-shaped; when the precast beam-column joint 100 is T-shaped, it includes one column connection part 110 and two beam connection parts 120, or two column connection parts 110 and one beam connection part 120; when the precast beam-column joint 100 is L-shaped, it includes one of the column connecting parts 110 and one of the beam connecting parts 120; when the precast beam column node 100 is in a cross shape, it includes two column connection parts 110 and two beam connection parts 120.
The prefabricated beam column node 100 is flexible in construction form, and can form T-shaped, L-shaped or cross-shaped node forms, so that different arrangement requirements in a frame structure system can be met.
More preferably, a column reinforcement 113 is embedded in the column connecting part 110, an outer section of the column reinforcement 113 extends out of an end surface of the column connecting part 110, and a column anchoring plate 114 is provided at an end of the outer section. The length of the outer section of the column reinforcing steel bars 113 and the outer section of the beam reinforcing steel bars 121 is 150-250 mm. Wherein, the area of the column anchoring plate 114 is not less than 6 times of the sectional area of the column reinforcing steel bar 113; similarly, the area of the beam anchoring plate 122 is not less than 6 times the sectional area of the beam reinforcement 121.
Preferably, the embedded portion of the connection steel plate 111 is provided with a through hole, or welded with a stud, etc., to form a shear connection key with the concrete of the column connection part 110.
Referring to fig. 4 and 5, the beam reinforcement 121 is provided at the periphery thereof with stirrups 130. The stirrup 130 may be in the form of a rectangular stirrup or a helical stirrup. When two roof beam connecting portion 120 butt joint, perhaps, when a roof beam connecting portion 120 and other roof beam component connection, beam reinforcing bar 121 indirect overlap joint, stirrup 130 plays the restraint effect to the overlap joint district concrete, can improve the anchor performance of reinforcing bar in cast in situ concrete unit 140 to improve steel bar connection connects power transmission performance.
Referring to fig. 6 and 7, the column reinforcing bars 113 are provided at the periphery thereof with stirrups 130. The stirrup 130 can be a rectangular stirrup or a spiral stirrup, and when two column connecting parts 110 are butted, or when one column connecting part 110 is connected with other column members, two connecting end plates 112 are fixedly connected through bolts 115, column reinforcements 113 are indirectly lapped, and the stirrup 130 plays a role in restraining the concrete in the lap joint area, so that the anchoring performance of the steel bar in the cast-in-place concrete unit 140 can be improved, and the force transmission performance of the steel bar connecting joint can be improved.
The cast-in-place concrete unit 140 preferably uses concrete of grade C30 or above, which can enhance the bonding effect between the steel bars and the concrete, thereby improving the indirect lapping force transfer performance of the steel bars.
And the beam anchoring plate 122 and the column anchoring plate 114 are fixed to the beam reinforcing bars 121 and the column reinforcing bars 113, respectively, by means of through-hole plug welding or screwing. A plurality of beam anchoring plates 122 which are arranged at intervals along the axial direction are arranged on the outer side section of each beam reinforcing steel bar 121; a plurality of column anchoring plates 114 are provided on an outer section of each of the column reinforcing bars 113 and are arranged at intervals in the axial direction. 2-5 or more anchor plates are arranged along the axial direction of the steel bar, so that the anchoring performance of the steel bar can be further improved, and the force transmission performance of the indirect lap joint steel bar is further improved.
The precast beam column node 100 provided by the invention has the advantages of simple structure, convenience in use, high component prefabrication degree, simple structure of a connecting node, high field construction efficiency, less field wet operation and low construction cost.
Example 2
The embodiment discloses a novel assembly type reinforced concrete building adopting the prefabricated beam-column joint 100 in the embodiment 1.
Referring to fig. 8, four precast beam-column nodes 100 are spliced into a frame of a building, and column connection portions 110 of two adjacent precast beam-column nodes 100 are directly connected in a height direction; the column reinforcing bars 113 are indirectly overlapped at the connection nodes of the column connection part 110, and the stirrups 130 are provided at the periphery.
In the horizontal direction, the beam connecting parts 120 of two adjacent precast beam-column nodes 100 are directly connected with each other. The beam reinforcements 121 are indirectly lapped at the connection nodes of the beam connection part 120, and stirrups 130 are arranged on the periphery.
Referring to fig. 9, optionally, a precast beam member 200 may be further included, the connecting end portion of the precast beam member 200 having a structure similar to that of the beam connecting portion 120, and a beam reinforcing bar 121 is also embedded, an outer section of the beam reinforcing bar 121 extends out of the connecting end portion of the precast beam member 200, and an end portion of the outer section is provided with a beam anchoring plate 122.
When the precast beam member 200 is connected with the beam connecting part 120 or the two beam connecting parts 120 are connected, the beam reinforcing steel bars 121 on the two are arranged in a staggered mode to form indirect lap joint, and concrete is poured afterwards to form a cast-in-place concrete unit.
Similarly, the prefabricated column component can also comprise a prefabricated column component, a connecting steel plate 111 is embedded in the connecting end part of the prefabricated column component, the extending section of the connecting steel plate 111 extends out of the connecting end part of the prefabricated column component, and the end part of the extending section is provided with a connecting end plate 112. A column steel bar 113 is embedded in the connecting end part of the prefabricated column component, the outer section of the column steel bar 113 extends out of the connecting end part of the prefabricated column component, and a column anchoring plate 114 is arranged at the end part of the outer section. That is, the structure of the prefabricated pillar member-connecting end portion is substantially the same as that of the pillar connecting portion 110, so that the connection of the prefabricated pillar member to the pillar connecting portion 110 of the prefabricated beam-pillar node 100 can be accomplished.
When the prefabricated column components are connected with the column connecting parts 110 or the two column connecting parts 110 are connected, the connecting end plates 112 on the two butted parts are fixedly connected in a bolt or welding mode, column reinforcing steel bars 113 on the two parts are arranged in a staggered mode to form indirect lap joint, and then concrete is poured to form a cast-in-place concrete unit.
Preferably, the cast-in-place section of the beam-column connecting node concrete is located in the middle of a beam span of a frame, namely at the position of a frame beam recurvation point under the action of seismic load.
Preferably, the length of the beam connection part 120 is one frame middle beam span 1/5; the height of the post connecting part 110 is 1/2 of the height of a post in one frame.
Under the action of seismic load, the stress of a beam-column joint area is complex, and the maximum bending moment and the shear force of the beam are generated on the end face of the beam instead of the midspan section; arranging connecting nodes between the beam units and the column units at the midspan positions of the structure, and keeping away from the beam-column node areas; the beam-beam connection node is applied to beam components mainly subjected to vertically and uniformly distributed loads, and the beam-beam connection node is arranged at a beam span 1/5 (a recurvation point), so that the design principle of strong connection and weak components is met.
According to the beam and column joint, the basic construction form of indirect lapping of the steel bars and the construction method of casting concrete in situ are adopted, so that extra grouting construction operation in situ is not needed, and grouting channels do not need to be reserved for prefabricated parts, so that the site construction cost is saved, and the processing cost of the prefabricated parts is also reduced.
The construction of the beam-column connecting joint of the novel assembly type reinforced concrete frame structure is carried out in the prefabricated processing factory, and the construction quality of the joint area can be guaranteed, so that the stress performance of the joint area is guaranteed, and the integral stress performance of the frame structure is facilitated.
Example 3
This embodiment is substantially the same as embodiment 1 or 2, except that:
referring to fig. 10, when two beam coupling parts 120 are coupled, or when the beam coupling part 120 and the precast beam member 200 are coupled, a beam spiral reinforcement 150 is further provided; one end of the beam spiral steel bar 150 is embedded in the beam connecting part 120, and the other end of the beam spiral steel bar 150 extends out of the end face of the beam connecting part 120 and is sleeved outside the two indirectly lapped beam steel bars 121.
And as shown in fig. 10, when the two column connecting parts 110 are connected, a column reinforcing screw 151 is further included; post spiral reinforcement 151 one end is pre-buried in a post connecting portion 110, and the post spiral reinforcement 151 other end stretches out the terminal surface and the suit of post connecting portion 110 are outside two indirect lapped post reinforcing bars 113.
Wherein, reinforcing bar anchor plate can show the anchoring ability that improves the reinforcing bar in cast in situ concrete unit to reduce the indirect lapped length of reinforcing bar.
The spiral reinforcing steel bars play a role in restraining the concrete in the lap joint area, and can improve the anchoring performance of the reinforcing steel bars in the cast-in-place concrete unit 140, so that the force transmission performance of the reinforcing steel bar connecting joint is improved.
Example 4
This example is substantially the same as examples 1-3, except that:
referring to fig. 11, in the present embodiment, the precast girder elements 200 and/or the girder connecting parts 120 are provided with the recesses 160 at the top. More preferably, in which the height of the notch 160 is 50mm or more, the precast beam member 200 and/or the hogging moment region reinforcing bars at the top of the beam coupling part 120 are constructed in the field, and can be formed into a laminated beam structure with a plate member or a sub-beam member.
Referring to fig. 12, the beam-column joint of the present embodiment includes two column connecting parts 110 (or precast column members) butted up and down, and two beam connecting parts 120 (or precast beam members 200) butted left and right.
When the two column connecting parts 110 (or the prefabricated column components and the column connecting parts 110) are connected, the connecting end plates 112 on the two butt joint components are fixedly connected in a bolt or welding mode, and the column reinforcing steel bars 113 on the two butt joint components are arranged in a staggered mode to form indirect lap joint; spiral stirrups 131 are sleeved outside each pair of column steel bars 113 which are indirectly overlapped up and down; when the two beam connecting parts 120 (or the precast beam components 200 and the beam connecting parts 120) are connected, the beam reinforcements 121 on the two butt joint components are arranged in a staggered manner to form indirect lap joint; spiral stirrups 131 are sleeved outside each pair of beam reinforcements 121 indirectly overlapped left and right.
And then casting a concrete beam unit 141 in situ between the two column connectors 110 (or the prefabricated column members and the column connectors 110) on the top of the prefabricated beam member 200 or the beam connector 120 and the notches 160 thereof, and burying longitudinal steel bars 170 penetrating through the left and right in the cast-in-situ concrete beam unit 141.
The cast-in-place concrete beam unit 141 forms a composite beam structure, and the shear resistance and the seismic resistance are greatly enhanced.
Example 5
This example is substantially the same as examples 1-4, except that:
referring to fig. 13, the present embodiment further includes a first buckle plate 60 for connecting a pair of beam reinforcements 121 or column reinforcements 113 indirectly overlapped. Referring to fig. 14, the first gusset plate 60 includes a connecting hole 61 and a wedge-shaped connecting groove 62 (a connecting groove with a larger opening).
The following column reinforcement 113 is an example to explain the structure.
Referring to fig. 13, two column connecting portions 110 adjacent up and down include an upper column connecting portion 110a and a lower column connecting portion 110 b. The lower column reinforcing steel bar 113b on the lower column connecting part 110b is provided with a protruding tail part 114c on the outer side of the lower column anchoring plate 114b, when in connection, the connecting hole 61 is sleeved on the tail part 114c of the lower column reinforcing steel bar 113b, the upper column reinforcing steel bar 113a on the upper column connecting part 110a slides into the wedge-shaped connecting groove 62 by rotating the first buckle plate 60, the central line of the wedge-shaped connecting groove 62 is in an involute form gradually increasing by the central radius of the connecting hole 61, the opening of the wedge-shaped connecting groove 62 is large, the bottom of the groove is narrow, the upper column reinforcing steel bar 113a is gradually clamped or is abutted against one side wall of the wedge-shaped connecting groove 62 in the process of sliding into the wedge-shaped connecting groove 62, so that the upper column reinforcing steel bar 113a and the lower column reinforcing steel bar 113b are rigidly connected in the transverse direction, and the transmission capacity of the shearing force of the two is increased.
And, the side walls of the left and right sides of the wedge-shaped connecting groove 62 are provided with the clamping grooves 63 at intervals, and after the upper column steel bar 113a slides into the clamping grooves 63, the upper column steel bar 113a is further locked, so that the connecting strength of the two is increased.
Example 6
This example is substantially the same as example 5 except that:
referring to fig. 15, the present embodiment includes a second buckle plate 60a for connecting two adjacent upper column steel bars 113a and lower column steel bars 113 b. Both ends of the second clip 60a are respectively clamped between two upper column anchor plates 114a and two lower column anchor plates 114 b. Thereby realizing rigid or semi-rigid connection of the upper column steel bar 113a and the lower column steel bar 113b in the axial direction, and further increasing the connecting force of the upper concrete unit and the lower concrete unit.
Referring to fig. 16, the second buckle plate 60a includes two U-shaped long grooves 64 that are perpendicular to each other, and the two U-shaped long grooves 64 that are perpendicular to each other make the second buckle plate 60a of this embodiment have very large versatility, so that even if the distance between the upper column reinforcement 113a and the lower column reinforcement 113b varies greatly, the same second buckle plate 60a can be used to quickly connect two adjacent upper column reinforcements 113a and lower column reinforcements 113 b.
More preferably, referring to fig. 17, two adjacent upper column reinforcements 113a and lower column reinforcements 113b are directly connected through the first gusset plate 60 and the second gusset plate 60 a.
Two upper column anchoring plates 114a are arranged on the upper column steel bar 113a at intervals; the lower column reinforcing steel bars 113b are provided with lower column anchoring plates 114b arranged at intervals, the outer sides of the lower column anchoring plates 114b of the lower column reinforcing steel bars 113b are provided with tails 114c, one end of the first buckle plate 60 is sleeved on the tails 114c of the lower column reinforcing steel bars 113b through the connecting hole 61, and the other end of the first buckle plate 60 is connected with the upper column reinforcing steel bars 113a through the wedge-shaped connecting groove 62.
The second buckle plate 60a is connected to the upper column steel bar 113a and the lower column steel bar 113b through the U-shaped long slots 64 at both ends, and both ends of the second buckle plate 60a are clamped between the two upper column anchoring plates 114a and the two lower column anchoring plates 114b, respectively. Therefore, the device has the advantages of force transfer capability of direct lap joint, simplicity in indirect lap joint and high efficiency, greatly improves the shearing resistance and the tensile resistance between the two concrete units, is convenient to implement and popularize, and is simple to operate and high in efficiency.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A precast beam column node is characterized by being used for being connected with a precast beam and a precast column simultaneously, wherein the precast beam column node comprises a column connecting part used for being connected with the precast column and a beam connecting part used for being connected with the precast beam;
the column connecting part and the beam connecting part are arranged vertically;
connecting steel plates are embedded in the column connecting parts, the overhanging sections of the connecting steel plates extend out of the end faces of the column connecting parts, and connecting end plates are arranged at the end parts of the overhanging sections;
the beam connecting part is internally embedded with beam reinforcing steel bars, the outer side section of each beam reinforcing steel bar extends out of the end face of the beam connecting part, and the end part of the outer side section is provided with a beam anchoring plate.
2. The precast beam column node of claim 1 wherein the precast beam column node is T-shaped, L-shaped, or cross-shaped;
when the prefabricated beam-column joint is T-shaped, the prefabricated beam-column joint comprises one column connecting part and two beam connecting parts, or two column connecting parts and one beam connecting part;
when the prefabricated beam column node is L-shaped, the prefabricated beam column node comprises one column connecting part and one beam connecting part;
when the precast beam column node is in a cross shape, the precast beam column node comprises two column connecting parts and two beam connecting parts.
3. The precast beam column node according to claim 1, wherein column reinforcing bars are buried in the column connecting part, outer sections of the column reinforcing bars protrude out of an end surface of the column connecting part, and end portions of the outer sections are provided with column anchoring plates.
4. The precast beam column node according to claim 3, wherein the length of the outer section of the column reinforcing bar and the outer section of the beam reinforcing bar is 150-250 mm;
the area of the column anchoring plate is not less than 6 times of the sectional area of the column reinforcing steel bar; the area of the beam anchoring plate is not less than 6 times of the sectional area of the beam reinforcing steel bar.
5. The precast beam column node according to claim 3, wherein the column reinforcing bars and/or the beam reinforcing bars are provided with stirrups at the periphery.
6. The precast beam column node according to claim 3, wherein the beam anchoring plate and the column anchoring plate are fixed to the beam reinforcing bars and the column reinforcing bars, respectively, by means of perforated plug welding or screwing.
7. The precast beam column node according to claim 3, wherein a plurality of the beam anchoring plates are arranged on the outer side section of each beam reinforcement at intervals in the axial direction;
and/or a plurality of column anchoring plates which are distributed at intervals along the axial direction are arranged on the outer section of each column reinforcing steel bar.
8. The precast beam column node of claim 3, further comprising beam rebars; one end of the beam spiral steel bar is embedded in the beam connecting part, and the other end of the beam spiral steel bar extends out of the end face of the beam connecting part and is sleeved outside the beam steel bar;
And/or, also includes column spiral reinforcing steel bar; post spiral reinforcement one end is pre-buried in the column connection portion, the post spiral reinforcement other end stretches out the terminal surface and the suit of column connection portion are in outside the post reinforcing bar.
9. The precast beam column node of claim 3, further comprising a beam outer sleeve; one end of the beam outer sleeve is embedded in the beam connecting part, and the other end of the beam outer sleeve extends out of the end face of the beam connecting part and is sleeved outside the beam reinforcing steel bar;
and/or, further comprising a column outer sleeve; one end of the column outer sleeve is embedded in the column connecting portion, and the other end of the column outer sleeve extends out of the end face of the column connecting portion and is sleeved outside the column reinforcing steel bars.
10. A novel assembly type reinforced concrete building adopting the precast beam-column joint as claimed in any one of claims 3 to 9, which is characterized by further comprising precast column members, connecting steel plates are embedded in the connecting end parts of the precast column members, the overhanging sections of the connecting steel plates extend out of the connecting end parts of the precast column members, and the end parts of the overhanging sections are provided with connecting end plates;
column steel bars are embedded into the connecting end parts of the prefabricated column components, the outer sections of the column steel bars extend out of the connecting end parts of the prefabricated column components, and column anchoring plates are arranged at the end parts of the outer sections;
The beam steel bar embedded type beam anchoring structure is characterized by further comprising a precast beam component, wherein a beam steel bar is embedded in the connecting end part of the precast beam component, the outer side section of the beam steel bar extends out of the connecting end part of the precast beam component, and a beam anchoring plate is arranged at the end part of the outer side section.
CN202210668740.7A 2022-06-14 2022-06-14 Prefabricated beam column node and novel assembled reinforced concrete building thereof Active CN114753489B (en)

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CN215166497U (en) * 2021-04-30 2021-12-14 中国建筑第五工程局有限公司 Support-free precast concrete beam and precast concrete column head connecting structure
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