CN111980151A - Cast-in-place square column precast square beam concrete frame node - Google Patents

Cast-in-place square column precast square beam concrete frame node Download PDF

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Publication number
CN111980151A
CN111980151A CN202010901949.4A CN202010901949A CN111980151A CN 111980151 A CN111980151 A CN 111980151A CN 202010901949 A CN202010901949 A CN 202010901949A CN 111980151 A CN111980151 A CN 111980151A
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CN
China
Prior art keywords
square
cast
concrete square
precast concrete
unbonded
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Pending
Application number
CN202010901949.4A
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Chinese (zh)
Inventor
黄远
陶宇轩
邓露
周云
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Hunan University
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Hunan University
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Priority to CN202010901949.4A priority Critical patent/CN111980151A/en
Publication of CN111980151A publication Critical patent/CN111980151A/en
Pending legal-status Critical Current

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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
    • E04B1/19Three-dimensional framework structures
    • 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
    • E04B1/19Three-dimensional framework structures
    • E04B1/1903Connecting nodes specially adapted therefor
    • 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
    • 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
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The invention discloses a cast-in-place square column precast square beam concrete frame node which comprises a cast-in-place concrete square column, a plurality of precast concrete square beams, a plurality of beam bottom longitudinal ribs, a plurality of unbonded buckling-preventing sleeves, a plurality of beam top longitudinal ribs and an upper cast-in-place area of a plurality of overlapped square beams. Cast in situ concrete square column and two precast concrete square girders are connected through concreting, the cast in situ region in upper portion of coincide square girder is connected through concreting with the precast concrete square girder, and a plurality of roof beam bottoms are indulged the muscle and are passed the unbonded buckling prevention sleeve, and a plurality of unbonded buckling prevention sleeves are located precast concrete square girder bottom, and a plurality of roof beam tops are indulged the muscle and are located the cast in situ region in upper portion and the cast in situ concrete square column of coincide square girder. The free extension distance of the steel bar is lengthened by the unbonded buckling-restrained sleeve at the end of the prefabricated overlapped square beam, so that the length of the plastic hinge is increased, the rotation ductility of the square beam end is improved, and the problem that the steel bar is buckled in the sleeve when the structure is subjected to reciprocating load is solved.

Description

Cast-in-place square column precast square beam concrete frame node
Technical Field
The invention relates to the technical field of building structures, in particular to a cast-in-place square column precast square beam concrete frame node.
Background
When an earthquake occurs, concrete at the beam end of the concrete frame cracks under the action of tensile force, so that the strain of the steel bar at the concrete cracking position is increased sharply, and the PVC sleeve is adopted in engineering to wrap the steel bar in the concrete beam so as to lengthen the free extension distance of the steel bar, so that the plastic hinge length of the beam is increased, and the rotation ductility of the beam end is improved. But under the earthquake reciprocating load, the steel bars can be bent in the PVC sleeve when being subjected to pressure.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a cast-in-place square column precast square beam concrete frame node, which is characterized in that an unbonded buckling-restrained sleeve is wrapped outside a longitudinal bar at the bottom of a beam to lengthen the free extension distance of the bar, so that the plastic hinge length is increased, the rotation ductility of the square beam end is further improved, and the bar is prevented from buckling inside the sleeve.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a cast-in-place square column precast square beam concrete frame node comprises a cast-in-place concrete square column (1) and two precast concrete square beams (2), wherein a plurality of beam bottom longitudinal ribs (21) and unbonded buckling-restrained sleeves (22) are arranged at the bottom ends inside the precast concrete square beams (2), one ends of the unbonded buckling-restrained sleeves (22) are coplanar with and communicated with one surface of each precast concrete square beam (2), each beam bottom longitudinal rib (21) penetrates one unbonded buckling-restrained sleeve (22) to extend out of the surface of each precast concrete square beam (2), and the extending part of each beam bottom longitudinal rib (21) is bent;
the two precast concrete square beams (2) are opposite, the bending part of the beam bottom longitudinal rib (21) of each precast concrete square beam (2) is tightly attached to the opposite side of the other precast concrete square beam (2), a concrete square column (1) vertically connected with the two precast concrete square beams (2) is formed by pouring between the two precast concrete square beams (2), a plurality of beam top longitudinal ribs (3) are arranged at the external top ends of the two precast concrete square beams (2), each beam top longitudinal rib (3) is respectively connected with the two precast concrete square beams (2), and a concrete layer (4) is poured at the external top end of the concrete square beam (2); the two precast concrete square beams (2), the concrete layer (4) and the concrete square column (1) are integrally connected; one end of the cast-in-place concrete square column (1) is positioned above the two precast concrete square beams (2), and the other end of the cast-in-place concrete square column is positioned below the two precast concrete square beams (2); the bent part of the beam bottom longitudinal bar (21) is positioned inside the cast-in-place concrete square column (1).
The unbonded buckling-restrained sleeve (22) is a steel pipe, and a lubricating grease coating is coated on the inner side and the outer side of the steel pipe. The inner diameter of the steel pipe is 2-4mm larger than the diameter of the longitudinal bar (21) at the bottom of the beam, the thickness of the steel pipe is 3-5mm, and the length of the steel pipe is 20-30 times of the diameter of the longitudinal bar (21) at the bottom of the square beam.
And a lubricating grease coating is coated on the part of the square beam bottom longitudinal rib (21) penetrating through the unbonded buckling-restrained sleeve.
The precast concrete square beam (2), the unbonded buckling sleeve (22) and the longitudinal rib (21) at the bottom of the square beam are unbonded.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
the unbonded buckling-restrained sleeve is utilized to lengthen the free extension distance of the steel bar, so that the length of the plastic hinge is increased, the rotation ductility of the square beam end is improved, and the defect that the steel bar at the square beam end is buckled under the earthquake reciprocating load is overcome.
Drawings
FIG. 1 is a schematic view of a cast-in-place square column precast square beam concrete frame joint of the present invention;
FIG. 2 is a schematic view of a prefabricated overlapping square beam of the present invention;
in the figure: the concrete-reinforced concrete beam comprises 1-cast-in-place concrete square columns, 2-precast concrete square beams, 21-beam bottom longitudinal ribs, 22-unbonded buckling-restrained sleeves, 3-beam top longitudinal ribs and 4-concrete layers.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the invention provides a cast-in-place square column precast square beam concrete frame node which comprises a cast-in-place concrete square column (1) and two precast concrete square beams (2), wherein a plurality of beam bottom longitudinal ribs (21) and unbonded buckling-restrained sleeves (22) are arranged at the bottom ends inside the precast concrete square beams (2), one ends of the unbonded buckling-restrained sleeves (22) are coplanar with and communicated with one surface of each precast concrete square beam (2), each beam bottom longitudinal rib (21) penetrates through one unbonded buckling-restrained sleeve (22) to extend out of the surface of each precast concrete square beam (2), and the extending part of each beam bottom longitudinal rib (21) is bent;
the two precast concrete square beams (2) are opposite, the bending part of the beam bottom longitudinal rib (21) of each precast concrete square beam (2) is tightly attached to the opposite side of the other precast concrete square beam (2), a concrete square column (1) vertically connected with the two precast concrete square beams (2) is formed by pouring between the two precast concrete square beams (2), a plurality of beam top longitudinal ribs (3) are arranged at the external top ends of the two precast concrete square beams (2), each beam top longitudinal rib (3) is respectively connected with the two precast concrete square beams (2), and a concrete layer (4) is poured at the external top end of the concrete square beam (2); the two precast concrete square beams (2), the concrete layer (4) and the concrete square column (1) are integrally connected; one end of the cast-in-place concrete square column (1) is positioned above the two precast concrete square beams (2), and the other end of the cast-in-place concrete square column is positioned below the two precast concrete square beams (2); the bent part of the beam bottom longitudinal bar (21) is positioned inside the cast-in-place concrete square column (1).
Furthermore, the unbonded buckling-restrained sleeve (22) is a steel pipe, and the inner side and the outer side of the unbonded buckling-restrained sleeve are both provided with lubricating grease coatings.
Furthermore, the inner diameter of the unbonded buckling-restrained sleeve (22) is 2-4mm larger than the diameter of the beam bottom longitudinal rib (21), the thickness of the unbonded buckling-restrained sleeve (22) is 3-5mm, and the length of the unbonded buckling-restrained sleeve (22) is 20-30 times of the diameter of the beam bottom longitudinal rib (21).
Furthermore, a lubricating grease coating is coated on the part, penetrating through the unbonded anti-buckling sleeve, of the steel bar at the bottom of the square beam.
Furthermore, the precast concrete square beam (2), the unbonded buckling sleeve (22) and the beam bottom longitudinal rib (21) are not bonded.
Referring to fig. 1 to 2, the manufacturing method of the present invention includes the following steps:
the method comprises the following steps: firstly, the precast concrete square beam 1 is manufactured, the manufacturing steps are as follows, then, the lubricating grease coating is smeared on the region of the longitudinal rib 21 at the bottom of the beam inside the unbonded buckling-restrained sleeve 22, then, the lubricating grease coating is smeared on the inner side and the outer side of the unbonded buckling-restrained sleeve 22, then, the unbonded buckling-restrained sleeve 22 penetrates through the longitudinal rib 21 at the bottom of the beam to the position shown in the figure, the longitudinal rib 21 at the bottom of the bent beam is used for binding a reinforcement cage, and finally, concrete is poured to manufacture the precast concrete square beam.
Step two: and hoisting the precast concrete square beams 2 on the two sides, and binding the top longitudinal ribs 3 of the beams to the precast concrete square beams 2.
Step three: and binding a reinforcement cage of the cast-in-place concrete square column 1, and pouring the cast-in-place concrete square column 1 and stacking the concrete layer 4 to form integral connection.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. The utility model provides a cast-in-place square column precast square beam concrete frame node, this node includes cast in-place concrete square column (1) and two precast concrete square beams (2), its characterized in that: the bottom end in the precast concrete square beam (2) is provided with a plurality of beam bottom longitudinal ribs (21) and unbonded buckling-preventing sleeves (22), one end of each unbonded buckling-preventing sleeve (22) is in the same plane as one plane of the precast concrete square beam (2) and is communicated with the plane of the precast concrete square beam, each beam bottom longitudinal rib (21) penetrates through one unbonded buckling-preventing sleeve (22) to extend out of the plane of the precast concrete square beam (2), and the extending part of each beam bottom longitudinal rib (21) is bent;
the two precast concrete square beams (2) are opposite, the bending part of the beam bottom longitudinal rib (21) of each precast concrete square beam (2) is tightly attached to the opposite side of the other precast concrete square beam (2), a concrete square column (1) vertically connected with the two precast concrete square beams (2) is formed by pouring between the two precast concrete square beams (2), a plurality of beam top longitudinal ribs (3) are arranged at the external top ends of the two precast concrete square beams (2), each beam top longitudinal rib (3) is respectively connected with the two precast concrete square beams (2), and a concrete layer (4) is poured at the external top end of the concrete square beam (2); the two precast concrete square beams (2), the concrete layer (4) and the concrete square column (1) are integrally connected; one end of the cast-in-place concrete square column (1) is positioned above the two precast concrete square beams (2), and the other end of the cast-in-place concrete square column is positioned below the two precast concrete square beams (2); the bent part of the beam bottom longitudinal bar (21) is positioned inside the cast-in-place concrete square column (1); the unbonded buckling-restrained sleeve (22) is a steel pipe, and the inner side and the outer side of the unbonded buckling-restrained sleeve are both provided with lubricating grease coatings.
2. The cast-in-place square column precast square beam concrete frame joint as claimed in claim 1, wherein the steel bars at the bottom of the square beam are coated with grease through the part of the unbonded buckling restrained sleeve.
3. A cast-in-place square column precast square beam concrete frame node according to claim 1 or 2, characterized in that there is no bonding between the precast concrete square beam (2), unbonded buckling sleeve (22) and beam bottom longitudinal bar (21).
CN202010901949.4A 2020-09-01 2020-09-01 Cast-in-place square column precast square beam concrete frame node Pending CN111980151A (en)

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CN202010901949.4A CN111980151A (en) 2020-09-01 2020-09-01 Cast-in-place square column precast square beam concrete frame node

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CN202010901949.4A CN111980151A (en) 2020-09-01 2020-09-01 Cast-in-place square column precast square beam concrete frame node

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112411744A (en) * 2020-11-26 2021-02-26 周乾宁 Reinforced concrete beam column cross connection node structure

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366412A1 (en) * 1976-09-30 1978-04-28 Baltrusaitis Jean Building elements forming hexagonal cells - consist of prefabricated beams and columns producing three dimensional framework
KR100855547B1 (en) * 2007-05-25 2008-09-01 동서 피, 씨, 씨 주식회사 Structure for jointing framework of clean room construction
CN103924736A (en) * 2014-04-11 2014-07-16 北京工业大学 Reinforced concrete column with non-adhesive ends and preparation method thereof
CN103924728A (en) * 2014-04-12 2014-07-16 北京工业大学 End unbonded reinforced concrete beam with non-equal strengths
CN204753836U (en) * 2015-04-29 2015-11-11 国核电力规划设计研究院 Connected node of precast reinforced concrete roof beam and coincide post
CN205348390U (en) * 2015-11-16 2016-06-29 上海欧本钢结构有限公司 Connection structure of precast concrete roof beam and cast -in -place post
CN208088503U (en) * 2018-03-30 2018-11-13 魏萍 A kind of overlapping precast beam part and cast-in-place column combination assembling structure
CN110017035A (en) * 2019-05-08 2019-07-16 福州大学 A kind of precast prestressed bean column node method and structure of mixed-fiber reinforced concrete reinforcing
CN110241915A (en) * 2019-05-07 2019-09-17 济南大学 A kind of assembly concrete beam column L-type muscle integrated connection node and application method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366412A1 (en) * 1976-09-30 1978-04-28 Baltrusaitis Jean Building elements forming hexagonal cells - consist of prefabricated beams and columns producing three dimensional framework
KR100855547B1 (en) * 2007-05-25 2008-09-01 동서 피, 씨, 씨 주식회사 Structure for jointing framework of clean room construction
CN103924736A (en) * 2014-04-11 2014-07-16 北京工业大学 Reinforced concrete column with non-adhesive ends and preparation method thereof
CN103924728A (en) * 2014-04-12 2014-07-16 北京工业大学 End unbonded reinforced concrete beam with non-equal strengths
CN204753836U (en) * 2015-04-29 2015-11-11 国核电力规划设计研究院 Connected node of precast reinforced concrete roof beam and coincide post
CN205348390U (en) * 2015-11-16 2016-06-29 上海欧本钢结构有限公司 Connection structure of precast concrete roof beam and cast -in -place post
CN208088503U (en) * 2018-03-30 2018-11-13 魏萍 A kind of overlapping precast beam part and cast-in-place column combination assembling structure
CN110241915A (en) * 2019-05-07 2019-09-17 济南大学 A kind of assembly concrete beam column L-type muscle integrated connection node and application method
CN110017035A (en) * 2019-05-08 2019-07-16 福州大学 A kind of precast prestressed bean column node method and structure of mixed-fiber reinforced concrete reinforcing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112411744A (en) * 2020-11-26 2021-02-26 周乾宁 Reinforced concrete beam column cross connection node structure
CN112411744B (en) * 2020-11-26 2021-12-10 吉林市第一建筑工程股份有限公司 Reinforced concrete beam column cross connection node structure

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Application publication date: 20201124