CN113638487B - Staggered connection structure of local superposed beam and prefabricated column node steel bar and construction method thereof - Google Patents
Staggered connection structure of local superposed beam and prefabricated column node steel bar and construction method thereof Download PDFInfo
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- CN113638487B CN113638487B CN202110507728.3A CN202110507728A CN113638487B CN 113638487 B CN113638487 B CN 113638487B CN 202110507728 A CN202110507728 A CN 202110507728A CN 113638487 B CN113638487 B CN 113638487B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 151
- 239000010959 steel Substances 0.000 title claims abstract description 151
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 21
- 239000004574 high-performance concrete Substances 0.000 claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 111
- 238000011065 in-situ storage Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 19
- 238000009417 prefabrication Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 108010068370 Glutens Proteins 0.000 description 2
- 235000021312 gluten Nutrition 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
- E04G21/123—Wire twisting tools
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a staggered connection structure of a local superposed beam and a prefabricated column node reinforcing steel bar and a construction method, comprising a prefabricated lower column, a first-direction local superposed beam and a second-direction local superposed beam which are respectively prefabricated by reinforced concrete, wherein the prefabricated lower column comprises a lower column main body and a lower column longitudinal reinforcing steel bar, a beam column node core area is arranged right above the lower column main body, one end of the lower column longitudinal reinforcing steel bar is positioned in the lower column main body, and the other end of the lower column longitudinal reinforcing steel bar extends into the beam column node core area. According to the invention, the beam end is locally arranged as the superposed beam, the connecting longitudinal ribs are additionally connected, and the beam end is respectively bound and lapped with the local superposed beam Liang Mianjin, so that the on-site steel bar operation and the concrete pouring quantity are reduced by adopting the connecting mode; meanwhile, high-performance concrete is post-poured in the beam column node connection area, so that the anti-seismic performance of the node is enhanced.
Description
Technical Field
The invention belongs to the technical field of assembly buildings, and particularly relates to a staggered connection structure of a local superposed beam and a prefabricated column node steel bar and a construction method thereof.
Background
In the current fabricated building project, the scheme adopted for the connection of the fabricated structural beam column is as follows: and (3) selecting a prefabricated lower column to be connected with the superposed beam in a post-pouring way, adding a superposed Liang Mianjin on a construction site after the prefabricated lower column and the superposed beam are lifted, and finally pouring common concrete in a beam column node core area and a superposed beam cast-in-situ layer.
The disadvantage of this connection scheme is that: the on-site working procedures are complex, the on-site concrete pouring amount and the steel bar operation are more, the on-site construction efficiency is restricted, the construction quality of the precast beam column node area is difficult to ensure, and the integral earthquake resistance of the fabricated building is influenced.
Disclosure of Invention
First, the technical problem to be solved
Based on the structure, the invention provides a staggered connection structure of a local superposed beam and a prefabricated column node steel bar and a construction method thereof, and aims to solve the technical problems of low construction efficiency and poor anti-seismic performance of an assembled structure beam column connection scheme in the prior art.
(II) technical scheme
In order to solve the technical problems, the invention provides a staggered connection structure of a local superposed beam and a precast column node steel bar, which comprises a precast lower column, a first-direction local superposed beam and a second-direction local superposed beam which are respectively precast by reinforced concrete, wherein the precast lower column comprises a lower column main body and a lower column longitudinal steel bar, a beam column node core area is arranged right above the lower column main body, one end of the lower column longitudinal steel bar is positioned in the lower column main body, and the other end of the lower column longitudinal steel bar extends into the beam column node core area;
The local composite beam of first direction includes first coincide main part, first coincide main part includes first full precast beam section and locates first full precast beam Duan Kaojin first local composite beam section of beam column node core area one end, the upper portion of first local composite beam section is the cast-in-place district of first local composite beam, first local composite beam of direction still includes: the first partial laminated beam bottom longitudinal steel bars and the first partial laminated Liang Mianbu longitudinal steel bars, wherein one end of each first partial laminated beam bottom longitudinal steel bar is arranged in the first laminated body, the other end of each first partial laminated beam bottom longitudinal steel bar extends into the beam column node core area, one end of each first partial laminated Liang Mianbu longitudinal steel bar is arranged in the first full precast beam section, and the other end of each first partial laminated Liang Mianbu longitudinal steel bar extends into the first partial laminated beam cast-in-situ area;
The local composite beam of second direction includes the second composite body, the second composite body includes the full precast beam section of second and locates the full precast beam Duan Kaojin of second the local composite beam section of beam column node core area one end, the upper portion of second local composite beam section is the cast-in-place district of second local composite beam, the local composite beam of second direction still includes: the second partially overlapped beam bottom longitudinal steel bars and the second partially overlapped Liang Mianbu longitudinal steel bars, wherein one end of each second partially overlapped beam bottom longitudinal steel bar is arranged in the second overlapped main body, the other end of each second partially overlapped beam bottom longitudinal steel bar extends into the beam column node core area, one end of each second partially overlapped Liang Mianbu longitudinal steel bar is arranged in the second full precast beam section, and the other end of each second partially overlapped Liang Mianbu longitudinal steel bar extends into the second partially overlapped beam cast-in-situ area;
and the beam-column node core area, the first local superposed beam cast-in-situ area and the second local superposed beam cast-in-situ area jointly form a beam-column node connecting area.
Preferably, the longitudinal bars at the bottom of the first partial laminated beam and the longitudinal bars at the bottom of the lower column are staggered, the longitudinal bars at the bottom of the second partial laminated beam and the longitudinal bars at the bottom of the lower column are staggered, and the longitudinal bars at the bottom of the first partial laminated beam and the longitudinal bars at the bottom of the second partial laminated beam, which extend into the core area of the beam column node, are staggered in the height direction of the prefabricated lower column.
Preferably, prefabricated lower column field stirrups are arranged in the beam column node core area.
Preferably, the first-direction partially overlapped beam further comprises a first overlapped beam Duan Gujin, and the first overlapped beam Duan Gujin is positioned in the first partially overlapped beam cast-in-situ area and is arranged around longitudinal steel bars at the bottom of the first partially overlapped beam; the second-direction local composite beam further comprises a second composite beam section stirrup, and the second composite beam section stirrup is positioned in the second local composite beam cast-in-place area and surrounds longitudinal steel bars at the bottom of the second local composite beam.
Preferably, the length direction of the first-direction partially overlapped beam is perpendicular to the length direction of the second-direction partially overlapped beam.
Preferably, the number of the first-direction local laminated beams is two, the two first-direction local laminated beams are arranged along the same straight line direction, the two first-direction local laminated beams are respectively arranged at two sides of the prefabricated lower column, the staggered connection structure of the local laminated beams and the prefabricated column node reinforcing steel bars further comprises first connection longitudinal ribs, one end of each first connection longitudinal rib is connected with the first local laminated Liang Mianbu longitudinal reinforcing steel bar in one first-direction local laminated beam, and the other end of each first connection longitudinal rib is connected with the first local laminated Liang Mianbu longitudinal reinforcing steel bar in the other first-direction local laminated beam; the number of the second-direction local laminated beams is two, the two second-direction local laminated beams are arranged along the same straight line direction, the two second-direction local laminated beams are respectively arranged on two sides of the prefabricated lower column, the dislocation connection structure of the local laminated beams and the prefabricated column node reinforcing steel bars further comprises second connection longitudinal ribs, one end of each second connection longitudinal rib is connected with one second local laminated Liang Mianbu longitudinal steel bar in the second-direction local laminated beam, and the other end of each second connection longitudinal rib is connected with the second local laminated Liang Mianbu longitudinal steel bar in the second-direction local laminated beam.
Preferably, the local superposed beam and prefabricated column node steel bar staggered connection structure further comprises a prefabricated upper column, and the prefabricated upper column comprises an upper column main body and an upper column connecting piece connected with the upper column main body.
Preferably, high-performance concrete is poured in the beam column node connection area in a cast-in-situ mode to form a beam column node connection part, wherein the high-performance concrete is one or a combination of a plurality of ultra-high-performance concrete, steel fiber concrete, active powder concrete and ECC.
The invention also provides a construction method of the local superposed beam and precast column node steel bar staggered connection structure, which comprises the following steps:
S1, manufacturing a prefabricated part: the prefabrication of the prefabrication lower column, the first-direction local superposed beam, the second-direction local superposed beam and the prefabrication upper column is completed according to design requirements;
s2, hoisting a prefabricated lower column: lifting the prefabricated lower column to a design position by utilizing a lifting appliance, and installing the prefabricated lower column;
s3, hoisting the local superposed beam in the first direction: measuring and paying off, placing a local superposed beam support, hoisting the local superposed beam in the first direction to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the first local superposed beam to extend into a beam column node core area and be staggered with the longitudinal steel bars of the lower column;
S4, hoisting the local superposed beam in the second direction: measuring and paying off, placing a local superposed beam support, hoisting the second-direction local superposed beam to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the second local superposed beam to extend into a beam column node core area and be staggered with the lower column longitudinal steel bars;
s5, site construction connection longitudinal ribs: respectively placing the first connecting longitudinal ribs and the second connecting longitudinal ribs which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal ribs and the first partial overlapping Liang Mianbu longitudinal steel bars, and binding and overlapping the second connecting longitudinal ribs and the second partial overlapping Liang Mianbu longitudinal steel bars;
S6, pouring in a beam column node connection area: installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing;
S7, mounting a prefabricated upper column: the position correction is carried out on the lower column longitudinal steel bars, the upper column connecting piece is a sleeve arranged at the bottom of the upper column main body, the sleeve is installed after the lower column longitudinal steel bars are aligned, the prefabricated upper column is installed, and the sleeve is connected in a grouting mode after column support is arranged.
The invention also provides another construction method of the staggered connection structure of the local superposed beam and the prefabricated column node steel bar, which comprises the following steps:
S1, manufacturing a prefabricated part: the prefabrication of the prefabrication lower column, the first-direction local superposed beam, the second-direction local superposed beam and the prefabrication upper column is completed according to design requirements;
s2, hoisting a prefabricated lower column: lifting the prefabricated lower column to a design position by utilizing a lifting appliance, and installing the prefabricated lower column;
s3, hoisting the local superposed beam in the first direction: measuring and paying off, placing a local superposed beam support, hoisting the local superposed beam in the first direction to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the first local superposed beam to extend into a beam column node core area and be staggered with the longitudinal steel bars of the lower column;
S4, hoisting the local superposed beam in the second direction: measuring and paying off, placing a local superposed beam support, hoisting the second-direction local superposed beam to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the second local superposed beam to extend into a beam column node core area and be staggered with the lower column longitudinal steel bars;
s5, site construction connection longitudinal ribs: respectively placing the first connecting longitudinal ribs and the second connecting longitudinal ribs which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal ribs and the first partial overlapping Liang Mianbu longitudinal steel bars, and binding and overlapping the second connecting longitudinal ribs and the second partial overlapping Liang Mianbu longitudinal steel bars;
s6, installing a prefabricated upper column: the upper column connecting piece is an upper column longitudinal steel bar, one end of the upper column longitudinal steel bar is positioned in the upper column main body, the other end of the upper column connecting piece stretches into the beam column node core area, and after the upper column longitudinal steel bar and the lower column longitudinal steel bar are arranged in a staggered manner, the prefabricated upper column is installed and a column support is arranged;
S7, pouring in a beam column node connection area: and (3) installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing.
(III) beneficial effects
Compared with the prior art, the invention has the beneficial effects that the local superposed beam and precast column node steel bar staggered connection structure mainly comprises:
According to the invention, the beam end is locally arranged as the superposed beam, the connecting longitudinal ribs are additionally connected, and the beam end is respectively bound and lapped with the local superposed beam Liang Mianjin, so that the on-site steel bar operation and the concrete pouring quantity are reduced by adopting the connecting mode; meanwhile, high-performance concrete is post-poured in the beam column node connection area, so that the anti-seismic performance of the node is enhanced.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the invention in any way, in which:
fig. 1 is a schematic diagram of an overall structure of a staggered connection structure of a partially overlapped beam and a prefabricated column node steel bar according to an embodiment of the invention;
fig. 2 is a schematic diagram of installation of a prefabricated lower column, a first-direction partially overlapped beam and a second-direction partially overlapped beam in a construction method of a partially overlapped beam and prefabricated column node steel bar staggered connection structure according to an embodiment of the present invention;
fig. 3 is a second schematic installation diagram of the partial overlapping beam in the first direction and the partial overlapping beam in the second direction in the construction method of the joint steel bar staggered connection structure of the partial overlapping beam and the prefabricated lower column according to the embodiment of the invention;
FIG. 4 is an enlarged view of a portion of FIG. 3at A;
Fig. 5 is a schematic diagram of pouring of a prefabricated lower column, a first-direction partially overlapped beam and a second-direction partially overlapped beam in a construction method of a partially overlapped beam and prefabricated column node steel bar staggered connection structure according to an embodiment of the invention.
Reference numerals illustrate:
01. The beam column joint core area, 02, a first local composite beam cast-in-place area, 03, a second local composite beam cast-in-place area, 1, a first direction local composite beam, 2, a second direction local composite beam, 3, a prefabricated lower column field stirrup, 4, a first connecting longitudinal stirrup, 5, a second connecting longitudinal stirrup, 6, a prefabricated upper column, 7, a prefabricated lower column, 8, a beam column joint connection part, 11, a first full-prefabricated beam section, 12, a first local composite beam section, 13, a first local composite beam bottom longitudinal stirrup, 14, a first local composite Liang Mianbu longitudinal stirrup, 15, a first composite beam Duan Gujin, 21, a second full-prefabricated beam section, 22, a second local composite beam section, 23, a second local composite beam bottom longitudinal stirrup, 24, a second local composite Liang Mianbu longitudinal stirrup, 25, a second composite beam section stirrup, 61, an upper column body, 62, an upper column connection piece, 71, a lower column body, and 72.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, communication between two elements, or "transmission connection", i.e. power connection by various suitable means such as belt transmission, gear transmission or sprocket transmission. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The staggered connection structure and construction method of the local composite beam and the prefabricated column node steel bar are further described below with reference to figures 1-5.
Example 1
Referring to fig. 2-4, a staggered connection structure of a local composite beam and a prefabricated column node steel bar comprises a prefabricated lower column 7, a first-direction local composite beam 1 and a second-direction local composite beam 2 which are respectively prefabricated by reinforced concrete, wherein the prefabricated lower column 7 comprises a lower column main body 71 and a lower column longitudinal steel bar 72, a beam column node core area 01 is arranged right above the lower column main body 71, one end of the lower column longitudinal steel bar 72 is positioned in the lower column main body 71, and the other end of the lower column longitudinal steel bar 72 extends into the beam column node core area 01; the first direction local composite beam 1 comprises a first composite body, the first composite body comprises a first full-precast beam section 11 and a first local composite beam section 12 arranged at one end of the first full-precast beam section 11 close to a beam column node core area 01, the upper part of the first local composite beam section 12 is a first local composite beam cast-in-situ area 02, and the first direction local composite beam 1 further comprises: the first partial laminated beam bottom longitudinal steel bar 13 and the first partial laminated Liang Mianbu longitudinal steel bar 14, one end of the first partial laminated beam bottom longitudinal steel bar 13 is arranged in the first laminated body, the other end of the first partial laminated beam bottom longitudinal steel bar 13 extends into the beam column node core area 01, one end of the first partial laminated Liang Mianbu longitudinal steel bar 14 is arranged in the first full precast beam section 11, and the other end of the first partial laminated Liang Mianbu longitudinal steel bar 14 extends into the first partial laminated beam cast-in-situ area 02; the second direction local composite beam 2 comprises a second composite body, the second composite body comprises a second full-precast beam section 21 and a second local composite beam section 22 arranged at one end of the second full-precast beam section 21 close to the beam column node core area 01, the upper part of the second local composite beam section 22 is a second local composite beam cast-in-situ area 03, and the second direction local composite beam 2 further comprises: the second partial laminated beam bottom longitudinal steel bar 23 and the second partial laminated Liang Mianbu longitudinal steel bar 24, one end of the second partial laminated beam bottom longitudinal steel bar 23 is arranged in the second laminated body, the other end of the second partial laminated beam bottom longitudinal steel bar 23 extends into the beam column node core area 01, one end of the second partial laminated Liang Mianbu longitudinal steel bar 24 is arranged in the second full precast beam section 21, and the other end of the second partial laminated Liang Mianbu longitudinal steel bar 24 extends into the second partial laminated beam cast-in-situ area 03; the beam-column node core area 01, the first local superposed beam cast-in-situ area 02 and the second local superposed beam cast-in-situ area 03 form a beam-column node connecting area together.
Referring to fig. 4, more specifically, the number of the first-direction partially overlapped beams 1 is two, the two first-direction partially overlapped beams 1 are arranged along the same straight line direction, the two first-direction partially overlapped beams 1 are respectively arranged at two sides of the prefabricated lower column 7, the staggered connection structure of the partially overlapped beams and the prefabricated column node reinforcing steel bars further comprises first connection longitudinal ribs 4, one ends of the first connection longitudinal ribs 4 are connected with first partially overlapped Liang Mianbu longitudinal reinforcing steel bars 14 in one first-direction partially overlapped beam 1, and the other ends of the first connection longitudinal ribs 4 are connected with first partially overlapped Liang Mianbu longitudinal reinforcing steel bars 14 in the other first-direction partially overlapped beam 1; the number of the second-direction local composite beams 2 is two, the two second-direction local composite beams 2 are arranged along the same straight line direction, the two second-direction local composite beams 2 are respectively arranged on two sides of the prefabricated lower column 7, the local composite beams and prefabricated column node reinforcing steel bar staggered connection structure further comprises second connection longitudinal ribs 5, one ends of the second connection longitudinal ribs 5 are connected with second local composite Liang Mianbu longitudinal reinforcing steel bars 24 in one second-direction local composite beam 2, and the other ends of the second connection longitudinal ribs 5 are connected with second local composite Liang Mianbu longitudinal reinforcing steel bars 24 in the other second-direction local composite beam 2.
In the staggered connection structure of the local composite beam and the precast column node steel bars, the local composite beam (comprising a first-direction local composite beam 1 and a second-direction local composite beam 2) is arranged at a beam end to be in a composite beam form, and the rest beam sections are all precast beams; the bottom ribs of the local composite beam (the longitudinal steel bars 13 at the bottom of the first local composite beam and the longitudinal steel bars 23 at the bottom of the second local composite beam) extend into the beam column node core area 01; the local overlapping Liang Mianjin (the first local overlapping Liang Mianbu longitudinal steel bar 14 and the second local overlapping Liang Mianbu longitudinal steel bar 24) extends to the beam end, and after the hoisting of the local overlapping beams at the two ends of the prefabricated lower column 7 is completed, the local overlapping beam connecting longitudinal bars (the first connecting longitudinal bars 4 and the second connecting longitudinal bars 5) are respectively bound and overlapped with the local overlapping Liang Mianjin at the two ends of the prefabricated lower column 7 on site. And finally, pouring high-performance concrete and other composite materials to realize high-strength connection of the local superposed beam and the prefabricated column.
According to the invention, the beam end is locally arranged as the superposed beam, and the additional connecting longitudinal ribs are respectively bound and lapped with the local superposed Liang Mianjin, so that the steel bar operation and the concrete pouring quantity of the construction site are greatly reduced, and the construction efficiency of the assembled building is improved; meanwhile, high-performance concrete is post-poured in the beam column node connection area, so that the anti-seismic performance of the beam column node is improved, and the node pouring quality is ensured.
According to the specific embodiment of the invention, the first partial laminated beam bottom longitudinal steel bars 13 and the lower column longitudinal steel bars 72 are staggered, the second partial laminated beam bottom longitudinal steel bars 23 and the lower column longitudinal steel bars 72 are staggered, and the first partial laminated beam bottom longitudinal steel bars 13 and the second partial laminated beam bottom longitudinal steel bars 23 which extend into the beam column node core area 01 are staggered with each other in the height direction of the prefabricated lower column 7. In this embodiment, the reinforcement is avoided by adopting the structure.
According to the specific embodiment of the invention, a prefabricated lower column field stirrup 3 is arranged in the beam column node core area 01. More specifically, the prefabricated lower column field stirrup 3 is a closed stirrup or an open stirrup or a combined U-shaped stirrup.
As shown in fig. 2 to 4, binding and overlapping of the connecting longitudinal bars (the first connecting longitudinal bar 4 and the second connecting longitudinal bar 5) are performed after the construction of the on-site stirrup of the prefabricated column is completed.
According to an embodiment of the present invention, the first direction partially overlapped beam 1 further comprises a first overlapped beam Duan Gujin, and the first overlapped beam Duan Gujin is located in the first partially overlapped beam cast-in-place area 02 and is arranged around the first partially overlapped beam bottom longitudinal steel bar 13; the second-direction local composite beam 2 further comprises a second composite beam section stirrup 25, and the second composite beam section stirrup 25 is positioned in the second local composite beam cast-in-situ area 03 and is arranged around the longitudinal reinforcing steel bar 23 at the bottom of the second local composite beam. More specifically, the first laminated beam Duan Gujin is a closed stirrup or an open stirrup; the second superimposed beam section stirrup 25 is a closed stirrup or an open stirrup. This structure is favorable to further improving joint strength.
According to an embodiment of the present invention, the longitudinal direction of the first direction partially folded beam 1 is perpendicular to the longitudinal direction of the second direction partially folded beam 2. The structure is used for forming a vertical beam structure and meets the building requirements.
Referring to fig. 1, according to the embodiment of the present invention, the structure for connecting the partially overlapped beam and the prefabricated column node steel bar in a staggered manner further includes a prefabricated upper column 6, and the prefabricated upper column 6 includes an upper column main body 61 and an upper column connecting piece 62 connected to the upper column main body 61. In this embodiment, the number of the pre-formed upper posts 6 is increased to meet the requirement of the design post height.
According to the specific embodiment of the invention, high-performance concrete is poured in the beam column node connecting area in a cast-in-situ mode to form the beam column node connecting part 8, wherein the high-performance concrete is one or a combination of a plurality of ultra-high-performance concrete, steel fiber concrete, reactive powder concrete and ECC. The adoption of the material is beneficial to improving the mechanical property of the beam column node connecting part 8.
In the above embodiment, the first-direction partially overlapped beam 1 and the first-direction partially overlapped beam 1 are partially overlapped beams, and longitudinal steel bars at the bottom of the partially overlapped beam extend out of the beam ends and into the beam column node core area 01, and the extending length is the anchoring length of the longitudinal bottom steel bars; the longitudinal reinforcing steel bars of the partial overlapping Liang Mianbu extend out of the full prefabricated section and extend into the overlapping beam section, and the extending length is the overlap length of the longitudinal gluten. The length of the superposed beam sections of the local superposed beam is larger than the overlap length of the longitudinal gluten of the local superposed beam. And stirrups of the superposed beam sections of the local superposed beams extend into the beam-column node connection areas.
Example 2
The invention also discloses a construction method of the local composite beam and precast column node steel bar staggered connection structure, wherein the local composite beam and precast column node steel bar staggered connection structure is the local composite beam and precast column node steel bar staggered connection structure pointed out in the embodiment 1, and the construction method comprises the following steps:
S1, manufacturing a prefabricated part: and the prefabrication of the prefabrication lower column 7, the first-direction partial overlapping beam 1, the second-direction partial overlapping beam 2 and the prefabrication upper column 6 is completed according to the design requirements.
S2, hoisting a prefabricated lower column 7: and lifting the prefabricated lower column 7 to a design position by utilizing a lifting appliance, and installing the prefabricated lower column 7.
In the concrete implementation, before the prefabricated lower column 7 is lifted, the specific position of a component is measured and paid out, the position of the longitudinal steel bar 72 of the lower column is corrected, and the steel gasket is used for leveling. Before the prefabricated lower column 7 is installed, the steel bars are also required to be aligned.
S3, hoisting the first-direction local composite beam 1: and (3) measuring and paying off, placing a local laminated beam support, hoisting the first-direction local laminated beam 1 to a corresponding position and leveling, so that the longitudinal steel bars 13 at the bottom of the first local laminated beam extend into the beam column node core area 01 and are arranged in a staggered manner with the longitudinal steel bars 72 of the lower column.
S4, hoisting the local superposed beam 2 in the second direction: and (3) measuring and paying off, placing a local laminated beam support, hoisting the second-direction local laminated beam 2 to a corresponding position, and leveling to enable the longitudinal steel bars 23 at the bottom of the second local laminated beam to extend into the beam column node core area 01 and be arranged in a staggered manner with the longitudinal steel bars 72 of the lower column.
In particular, the second partially overlapped beam bottom longitudinal bar 23 is located above the first partially overlapped beam bottom longitudinal bar 13.
S5, site construction connection longitudinal ribs: and respectively placing the first connecting longitudinal bar 4 and the second connecting longitudinal bar 5 which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal bar 4 and the first partial overlapping Liang Mianbu longitudinal bar 14, and binding and overlapping the second connecting longitudinal bar 5 and the second partial overlapping Liang Mianbu longitudinal bar 24.
S6, pouring in a beam column node connection area: and (3) installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing.
S7, installing a prefabricated upper column 6: the lower column longitudinal steel bars 72 are subjected to position correction, the upper column connecting piece is a sleeve arranged at the bottom of the upper column main body 61, after the sleeve is aligned with the lower column longitudinal steel bars 72, the upper column 6 is installed and prefabricated, and after column supports are arranged, the sleeve is connected in a grouting mode. In this embodiment, the prefabricated upper column 6 and the prefabricated lower column 7 are connected by sleeve grouting.
Example 3
The invention also discloses a construction method of the local composite beam and precast column node steel bar staggered connection structure, wherein the local composite beam and precast column node steel bar staggered connection structure is the local composite beam and precast column node steel bar staggered connection structure pointed out in the embodiment 1, and the construction method comprises the following steps:
S1, manufacturing a prefabricated part: and the prefabrication of the prefabrication lower column 7, the first-direction partial overlapping beam 1, the second-direction partial overlapping beam 2 and the prefabrication upper column 6 is completed according to the design requirements.
S2, hoisting a prefabricated lower column 7: and lifting the prefabricated lower column 7 to a design position by utilizing a lifting appliance, and installing the prefabricated lower column 7.
S3, hoisting the first-direction local composite beam 1: and (3) measuring and paying off, placing a local laminated beam support, hoisting the first-direction local laminated beam 1 to a corresponding position and leveling, so that the longitudinal steel bars 13 at the bottom of the first local laminated beam extend into the beam column node core area 01 and are arranged in a staggered manner with the longitudinal steel bars 72 of the lower column.
S4, hoisting the local superposed beam 2 in the second direction: and (3) measuring and paying off, placing a local laminated beam support, hoisting the second-direction local laminated beam 2 to a corresponding position, and leveling to enable the longitudinal steel bars 23 at the bottom of the second local laminated beam to extend into the beam column node core area 01 and be arranged in a staggered manner with the longitudinal steel bars 72 of the lower column.
S5, site construction connection longitudinal ribs: and respectively placing the first connecting longitudinal bar 4 and the second connecting longitudinal bar 5 which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal bar 4 and the first partial overlapping Liang Mianbu longitudinal bar 14, and binding and overlapping the second connecting longitudinal bar 5 and the second partial overlapping Liang Mianbu longitudinal bar 24.
S6, installing a pre-formed upper column 6: the upper column connecting piece 62 is an upper column longitudinal steel bar, one end of the upper column longitudinal steel bar is located in the upper column main body 61, the other end of the upper column connecting piece 62 stretches into the beam column node core area 01, and after the upper column longitudinal steel bar and the lower column longitudinal steel bar 72 are arranged in a staggered mode, the upper column 6 is installed and prefabricated, and a column support is arranged.
S7, pouring in a beam column node connection area: and (3) installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing.
In this embodiment, the prefabricated upper column 6 and the prefabricated lower column 7 are connected by staggered and overlapping longitudinal steel bars, and by adopting this structure, the lengths of the lower column longitudinal steel bars 72 and the upper column longitudinal steel bars extending into the beam column node core area 01 need to meet the requirement of the lap joint length.
It should be noted that: example 2 is essentially the same as example 3, except that steps S6-S7 are different.
In example 2, the prefabricated upper column 6 and the prefabricated lower column 7 are connected by sleeve grouting. In example 3, the prefabricated upper column 6 and the prefabricated lower column 7 are connected by staggered and overlapped longitudinal steel bars.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a local superimposed beam and precast column node reinforcing bar dislocation connection structure, its characterized in that includes precast lower post, first direction local superimposed beam, the local superimposed beam of second direction that is precast respectively by reinforced concrete, precast lower post includes lower post main part and lower post longitudinal reinforcement, be the beam column node core area directly over the lower post main part, one end of lower post longitudinal reinforcement is located lower post main part, the other end of lower post longitudinal reinforcement stretches into beam column node core area;
The local composite beam of first direction includes first coincide main part, first coincide main part includes first full precast beam section and locates first full precast beam Duan Kaojin first local composite beam section of beam column node core area one end, the upper portion of first local composite beam section is the cast-in-place district of first local composite beam, first local composite beam of direction still includes: the first partial laminated beam bottom longitudinal steel bars and the first partial laminated Liang Mianbu longitudinal steel bars, wherein one end of each first partial laminated beam bottom longitudinal steel bar is arranged in the first laminated body, the other end of each first partial laminated beam bottom longitudinal steel bar extends into the beam column node core area, one end of each first partial laminated Liang Mianbu longitudinal steel bar is arranged in the first full precast beam section, and the other end of each first partial laminated Liang Mianbu longitudinal steel bar extends into the first partial laminated beam cast-in-situ area;
The local composite beam of second direction includes the second composite body, the second composite body includes the full precast beam section of second and locates the full precast beam Duan Kaojin of second the local composite beam section of beam column node core area one end, the upper portion of second local composite beam section is the cast-in-place district of second local composite beam, the local composite beam of second direction still includes: the second partially overlapped beam bottom longitudinal steel bars and the second partially overlapped Liang Mianbu longitudinal steel bars, wherein one end of each second partially overlapped beam bottom longitudinal steel bar is arranged in the second overlapped main body, the other end of each second partially overlapped beam bottom longitudinal steel bar extends into the beam column node core area, one end of each second partially overlapped Liang Mianbu longitudinal steel bar is arranged in the second full precast beam section, and the other end of each second partially overlapped Liang Mianbu longitudinal steel bar extends into the second partially overlapped beam cast-in-situ area;
The beam column node core area, the first local superposed beam cast-in-situ area and the second local superposed beam cast-in-situ area jointly form a beam column node connecting area;
And pouring high-performance concrete in the beam column node connection area in a cast-in-situ mode to form a beam column node connection part, wherein the high-performance concrete is one or a combination of a plurality of ultra-high-performance concrete, steel fiber concrete, active powder concrete and ECC.
2. The structure according to claim 1, wherein the first partial laminated beam bottom longitudinal bars and the lower column longitudinal bars are arranged in a staggered manner, the second partial laminated beam bottom longitudinal bars and the lower column longitudinal bars are arranged in a staggered manner, and the first partial laminated beam bottom longitudinal bars and the second partial laminated beam bottom longitudinal bars extending into the beam column node core area are arranged in a staggered manner in the height direction of the lower prefabricated column.
3. The locally-folded beam and precast column joint reinforcement dislocation connection structure of claim 2, wherein precast lower column field stirrups are arranged in a beam column joint core area.
4. The localized composite beam and precast column node rebar misplacement connection configuration of claim 3, wherein the first direction localized composite beam further comprises a first composite beam Duan Gujin, the first composite beam Duan Gujin is positioned in the first localized composite beam cast-in-place region and disposed around the first localized composite beam bottom longitudinal rebar; the second-direction local composite beam further comprises a second composite beam section stirrup, and the second composite beam section stirrup is positioned in the second local composite beam cast-in-place area and surrounds longitudinal steel bars at the bottom of the second local composite beam.
5. The structure according to claim 4, wherein the longitudinal direction of the first-direction partially stacked beam is perpendicular to the longitudinal direction of the second-direction partially stacked beam.
6. The staggered connection structure of the local composite beams and the prefabricated column node reinforcing steel bars according to claim 5, wherein the number of the local composite beams in the first direction is two, the two local composite beams in the first direction are arranged along the same straight line direction, the two local composite beams in the first direction are respectively arranged at two sides of the prefabricated lower column, the staggered connection structure of the local composite beams and the prefabricated column node reinforcing steel bars further comprises a first connecting longitudinal rib, one end of the first connecting longitudinal rib is connected with the first local composite Liang Mianbu longitudinal reinforcing steel bar in one local composite beam in the first direction, and the other end of the first connecting longitudinal rib is connected with the first local composite Liang Mianbu longitudinal reinforcing steel bar in the other local composite beam in the first direction; the number of the second-direction local laminated beams is two, the two second-direction local laminated beams are arranged along the same straight line direction, the two second-direction local laminated beams are respectively arranged on two sides of the prefabricated lower column, the dislocation connection structure of the local laminated beams and the prefabricated column node reinforcing steel bars further comprises second connection longitudinal ribs, one end of each second connection longitudinal rib is connected with one second local laminated Liang Mianbu longitudinal steel bar in the second-direction local laminated beam, and the other end of each second connection longitudinal rib is connected with the second local laminated Liang Mianbu longitudinal steel bar in the second-direction local laminated beam.
7. The localized folded beam and precast column joint rebar misplacement connection structure of claim 6, further comprising a precast upper column comprising an upper column body and an upper column connector connected to the upper column body.
8. The construction method of the local composite beam and precast column joint steel bar staggered connection structure according to claim 7, comprising the following steps:
S1, manufacturing a prefabricated part: the prefabrication of the prefabrication lower column, the first-direction local superposed beam, the second-direction local superposed beam and the prefabrication upper column is completed according to design requirements;
s2, hoisting a prefabricated lower column: lifting the prefabricated lower column to a design position by utilizing a lifting appliance, and installing the prefabricated lower column;
s3, hoisting the local superposed beam in the first direction: measuring and paying off, placing a local superposed beam support, hoisting the local superposed beam in the first direction to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the first local superposed beam to extend into a beam column node core area and be staggered with the longitudinal steel bars of the lower column;
S4, hoisting the local superposed beam in the second direction: measuring and paying off, placing a local superposed beam support, hoisting the second-direction local superposed beam to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the second local superposed beam to extend into a beam column node core area and be staggered with the lower column longitudinal steel bars;
s5, site construction connection longitudinal ribs: respectively placing the first connecting longitudinal ribs and the second connecting longitudinal ribs which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal ribs and the first partial overlapping Liang Mianbu longitudinal steel bars, and binding and overlapping the second connecting longitudinal ribs and the second partial overlapping Liang Mianbu longitudinal steel bars;
S6, pouring in a beam column node connection area: installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing;
S7, mounting a prefabricated upper column: the position correction is carried out on the lower column longitudinal steel bars, the upper column connecting piece is a sleeve arranged at the bottom of the upper column main body, the sleeve is installed after the lower column longitudinal steel bars are aligned, the prefabricated upper column is installed, and the sleeve is connected in a grouting mode after column support is arranged.
9. The construction method of the local composite beam and precast column joint steel bar staggered connection structure according to claim 7, comprising the following steps:
S1, manufacturing a prefabricated part: the prefabrication of the prefabrication lower column, the first-direction local superposed beam, the second-direction local superposed beam and the prefabrication upper column is completed according to design requirements;
s2, hoisting a prefabricated lower column: lifting the prefabricated lower column to a design position by utilizing a lifting appliance, and installing the prefabricated lower column;
s3, hoisting the local superposed beam in the first direction: measuring and paying off, placing a local superposed beam support, hoisting the local superposed beam in the first direction to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the first local superposed beam to extend into a beam column node core area and be staggered with the longitudinal steel bars of the lower column;
S4, hoisting the local superposed beam in the second direction: measuring and paying off, placing a local superposed beam support, hoisting the second-direction local superposed beam to a corresponding position, and leveling to enable longitudinal steel bars at the bottom of the second local superposed beam to extend into a beam column node core area and be staggered with the lower column longitudinal steel bars;
s5, site construction connection longitudinal ribs: respectively placing the first connecting longitudinal ribs and the second connecting longitudinal ribs which are processed according to the design specification into the appointed position of the beam column node connecting area, binding and overlapping the first connecting longitudinal ribs and the first partial overlapping Liang Mianbu longitudinal steel bars, and binding and overlapping the second connecting longitudinal ribs and the second partial overlapping Liang Mianbu longitudinal steel bars;
s6, installing a prefabricated upper column: the upper column connecting piece is an upper column longitudinal steel bar, one end of the upper column longitudinal steel bar is positioned in the upper column main body, the other end of the upper column connecting piece stretches into the beam column node core area, and after the upper column longitudinal steel bar and the lower column longitudinal steel bar are arranged in a staggered manner, the prefabricated upper column is installed and a column support is arranged;
S7, pouring in a beam column node connection area: and (3) installing a precast post-pouring section template and a local overlapping Liang Fengbian template, pouring high-performance concrete after checking, and vibrating and curing.
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