CN114016605A - Unequal-strength beam column joint based on ring rib constraint concrete superposed short column - Google Patents
Unequal-strength beam column joint based on ring rib constraint concrete superposed short column Download PDFInfo
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- CN114016605A CN114016605A CN202111629902.8A CN202111629902A CN114016605A CN 114016605 A CN114016605 A CN 114016605A CN 202111629902 A CN202111629902 A CN 202111629902A CN 114016605 A CN114016605 A CN 114016605A
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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
- E04B1/21—Connections specially adapted therefor
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- 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
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
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Abstract
The invention discloses a beam column joint with unequal strength based on a ring rib constraint concrete superposed short column. The core area of the node adopts low concrete pouring which is the same as the beam slab, and is internally provided with a ring rib constraint concrete superposed short column which is provided with a ring rib and a short longitudinal rib. The core area of the node is poured by the low concrete which is the same as the beam slab, so that the construction difficulty of the unequal strength concrete beam column node can be reduced; the interior of the node is provided with the ring rib restraining concrete overlapping short column, so that the transverse deformation of the concrete in the node core area can be restrained, the bearing capacity, the ductility and the energy consumption capacity of the node core area are improved, the anti-seismic performance of the node is improved, and the influence on the structure caused by the reduction of the concrete strength in the node core area is eliminated so as to realize the reinforcement of the node core area.
Description
Technical Field
The invention relates to an unequal strength beam-column node, in particular to an unequal strength beam-column node based on a ring rib constraint concrete superposed short column.
Background
With the widespread use of high-strength concrete in recent years, in order to reduce the cross-sectional area and improve the space utilization rate, the high-strength concrete is generally adopted for the columns, and the beam slab is large in area, so that the high-strength concrete is easy to generate shrinkage cracks to influence the quality, and meanwhile, common concrete with relatively low strength grade is generally adopted to meet the bending resistance requirement.
In the prior art, in order to facilitate construction and reduce cost, the core area of the node of the concrete unequal-strength beam column adopts lower concrete with the same strength grade as that of a beam slab, and the method reduces the strength of the concrete in the core area of the node, but can bring certain influence on the structural performance of the unequal-strength beam column.
Disclosure of Invention
The invention aims to solve the problems and provide an unequal strength beam column node for restraining a concrete overlapping short column based on a ring rib. The invention improves the node core area from the mechanism, adopts a strengthening method of internally arranging the ring reinforcement to restrain the concrete superposed short column to improve the bearing capacity, the ductility and the energy consumption capability of the unequal-strength beam-column node, has reasonable construction measures and eliminates the influence of the strength reduction of the node concrete. The construction is simple and convenient, the economy is strong, and the method is suitable for wide popularization and application in engineering.
The invention realizes the purpose through the following technical scheme: unequal strength beam column node based on ring rib constraint concrete overlapping short column, comprises
The concrete column forms a main body structure of the beam-column joint and consists of first strength grade concrete formed by horizontal pouring and second strength grade concrete vertically poured on the upper side and the lower side of the first strength grade concrete respectively;
the column longitudinal reinforcements are vertically embedded in the concrete column of the beam-column joint, and are provided with a plurality of reinforcement cages which are bundled and fixed by column combined stirrups to form columns;
the ring reinforcement constraint concrete superposed short column is internally arranged in a reinforcement cage formed by the column longitudinal reinforcements and the column combined stirrups which are longitudinally arranged and consists of ring reinforcements and short longitudinal reinforcements;
the ring rib is in a single ring rib form and a double ring rib form which are bound by a round rib and a lacing wire; the ring ribs and the short longitudinal ribs are arranged in the first strength grade concrete at the node intersection position and axially distributed in the column to stretch into the second strength grade concrete of the upper column and the lower column, and at least two ring ribs are arranged in the second strength grade concrete of the upper column and the lower column to form a ring rib constraint concrete superposed short column.
As a still further scheme of the invention: the second strength grade concrete design strength is not less than two grades higher than the first strength grade concrete design strength.
As a still further scheme of the invention: the ring rib can be made of steel, high-strength fiber composite materials and the like.
As a still further scheme of the invention: the distance between two connected annular reinforced columns in the axial direction is not more than 80 mm.
As a still further scheme of the invention: the circular rib lap joint section of the ring rib adopts double-sided lap joint welding, the lap joint length is not less than 5 times of the diameter of the ring rib, and the whole circular rib is positioned in the same plane.
As a still further scheme of the invention: the ring ribs are bound on the short longitudinal ribs to form a whole.
A construction method of an unequal-strength beam column node based on a ring rib constraint concrete superposed short column comprises the following steps:
binding and molding column longitudinal bars, column combined stirrups, annular bars and short longitudinal bars according to a reinforcement distribution diagram to form a reinforcement cage of a lower column, wherein the first annular bar is bound on the column combined stirrups, and then the short bars are bound on the annular bars;
step two, binding and molding the plate reinforcement, the beam longitudinal reinforcement, the beam stirrups, the stirrups in the node core area, the ring reinforcement and the short longitudinal reinforcement according to a reinforcement distribution diagram to form a beam plate and a reinforcement cage in the node core area;
pouring concrete with a second strength grade of the lower column;
pouring concrete with a first strength grade in a node core area and a beam plate;
and step five, repeating the steps.
The invention has the beneficial effects that: 1) on the basis of the original beam-column joint with unequal strength, the core area of the joint is cast by low concrete with the same strength grade as a beam slab, and is internally provided with annular ribs and short longitudinal ribs to form an annular rib restrained concrete superposed short column; 2) the node area of the invention is poured by the low concrete which is the same as the beam slab, so that the construction difficulty of the unequal strength concrete beam column node can be reduced; the node ring rib restraint concrete coincide short column can restrain the horizontal deformation of node core district concrete, improves bearing capacity, ductility and the power consumption ability in node core district, improves the anti-seismic performance of node, eliminates the influence that the reduction of node core district concrete intensity brought the structure to realize the enhancement in node core district.
The invention reduces the construction difficulty of the unequal strength beam column node and ensures the anti-seismic performance of the unequal strength node.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the column of FIG. 1 with ring bars to restrain the concrete overlapping short columns;
FIG. 3 is a view of a ring rib in different forms;
FIG. 4 is a structural diagram of a joint of an original beam column with different strengths;
in the figure: 1. the column is indulged the muscle, 2, column combination stirrup, 3, first strength grade concrete, 4, strength concrete, 5, ring muscle, 501, circular muscle, 502, lacing wire, 6, short longitudinal muscle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, an unequal-strength beam-column joint based on a ring-reinforced concrete composite short column includes a column longitudinal reinforcement 1, a column composite hoop reinforcement 2, a first strength grade concrete 3, a second strength grade concrete 4, a ring reinforcement 5, and a short longitudinal reinforcement 6.
The high-strength concrete 4 has a design strength higher than that of the low-strength concrete 3 by more than two levels. It should be noted that: in the field of building construction, the second strength grade concrete 4 is a higher strength grade concrete, and the first strength grade concrete 3 is a lower strength grade concrete.
The ring rib 5 can be made of materials such as lower steel, high-performance composite materials and the like.
The circular rib 501 lap joint section of ring muscle 5 adopts two-sided overlap joint to weld, and lap joint length is not less than 5 times circular rib 501 diameter, and whole circular rib 501 is located the coplanar, is convenient for improve space utilization.
In the embodiment of the invention, the distance between two connected ring ribs 5 along the axis of the column is not more than 80mm, so that the bearing capacity of the beam-column node with unequal strength is improved conveniently.
Example two
Referring to fig. 1 to 4, an unequal strength beam-column joint based on ring rib constraint concrete overlapping short column includes
The concrete column forms a main body structure of the beam-column joint and consists of first strength grade concrete 3 formed by horizontal pouring and second strength grade concrete 4 respectively vertically poured on the upper side and the lower side of the first strength grade concrete 3;
the column longitudinal reinforcements 1 are vertically embedded in the concrete column of the beam-column joint, and are provided with a plurality of reinforcement cages which are bundled and fixed by the column combined stirrups 2 to form a column;
the ring reinforcement constraint concrete superposed short column is internally arranged in a reinforcement cage formed by the column longitudinal reinforcements 1 and the column combined stirrups 2 which are longitudinally arranged and consists of a ring reinforcement 5 and a short longitudinal reinforcement 6;
the ring rib 5 is in a single-ring rib form and a double-ring rib form which are bound by a round rib 501 and a tie rib 502; the ring ribs 5 and the short longitudinal ribs 6 are arranged in the first strength grade concrete 3 at the node intersection position and axially distributed in the column to stretch into the second strength grade concrete 4 of the upper column and the lower column, and at least two ring ribs 5 are arranged in the second strength grade concrete 4 of the upper column and the lower column to form a ring rib constraint concrete superposed short column.
In the embodiment of the invention, the ring ribs 5 are bound on the short longitudinal ribs 6 to form a whole, so that the binding efficiency is high.
EXAMPLE III
A construction method of an unequal-strength beam column node based on a ring rib constraint concrete superposed short column comprises the following steps:
step one, according to a reinforcement distribution diagram, binding and molding a column longitudinal rib 1, a column combined hoop 2, a ring rib 5 and a short longitudinal rib 6 to form a reinforcement cage of the column, wherein the first ring rib 5 is bound on the column combined hoop 2, and then the short longitudinal rib 6 is bound on the ring rib 5.
And step two, binding and molding the plate reinforcement, the beam longitudinal reinforcement, the beam stirrups, the stirrups in the node core area, the ring reinforcement 5 and the short longitudinal reinforcement 6 according to the reinforcement distribution diagram to form the beam plate and the node core area reinforcement cage.
And step three, pouring the lower column second strength grade concrete 4.
And step four, pouring the first strength grade concrete 3 of the node core area and the beam slab.
And step five, repeating the steps.
The working principle is as follows: when the beam-column joint with unequal strength based on the annular reinforcement constraint concrete superposed short column and the construction method thereof are used, the column longitudinal reinforcement 1, the column combined stirrup 2, the annular reinforcement 5 and the short longitudinal reinforcement 6 are bound and formed according to a reinforcement distribution diagram to form a reinforcement cage of a lower column, then the plate reinforcement, the beam longitudinal reinforcement, the beam stirrup, the stirrup of a core area of the joint, the annular reinforcement 5 and the short longitudinal reinforcement 6 are bound and formed according to the reinforcement distribution diagram to form a beam plate and a reinforcement cage of a core area of the joint, then the concrete of a second strength grade of the lower column is poured, the concrete of the core area of the joint and the concrete of the first strength grade of the beam plate is poured, and finally the steps are repeated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides an unequal strength beam column node based on ring muscle restraint concrete coincide short column which characterized in that: comprises that
The concrete column forms a main body structure of the beam-column joint and consists of first strength grade concrete (3) formed by horizontal pouring and second strength grade concrete (4) respectively vertically poured on the upper side and the lower side of the first strength grade concrete (3);
the column longitudinal reinforcements (1) are vertically embedded in the concrete column of the beam-column joint, and are provided with a plurality of reinforcement cages which are bundled and fixed by column combined stirrups (2) to form columns;
the ring reinforcement constraint concrete superposed short column is internally arranged in a reinforcement cage formed by the column longitudinal reinforcements (1) and the column combined stirrups (2) which are longitudinally arranged and consists of ring reinforcements (5) and short longitudinal reinforcements (6);
the ring rib (5) is in a single-ring rib form and a double-ring rib form which are bound by a round rib (501) and a tie rib (502); the ring ribs (5) and the short longitudinal ribs (6) are arranged in the first strength grade concrete (3) at the node intersection positions and are axially distributed in the upper and lower column second strength grade concrete (4), and at least two ring ribs (5) are arranged in the upper and lower column second strength grade concrete (4) to form a ring rib constraint concrete superposed short column.
2. The unequal-strength beam-column joint based on the ring-reinforced constraint concrete superposed short column as claimed in claim 1, wherein: the second strength grade concrete (4) has a design strength higher than that of the first strength grade concrete (3) by more than two grades.
3. The unequal-strength beam-column joint based on the ring-reinforced constraint concrete superposed short column as claimed in claim 1, wherein: the ring rib (5) is made of steel and high-strength fiber composite materials.
4. The unequal-strength beam-column joint based on the ring-reinforced constraint concrete superposed short column as claimed in claim 1, wherein: the circular rib (501) lap joint section of the ring rib (5) adopts double-sided lap joint welding, the lap joint length is more than 5 times of the diameter of the circular rib (501), and the whole circular rib (501) is positioned in the same plane.
5. The unequal-strength beam-column joint based on the ring-reinforced constraint concrete superposed short column as claimed in claim 1, wherein: the distance between two connected ring ribs (5) in the axial direction of the column is not more than 80 mm.
6. The unequal-strength beam-column joint based on the ring-reinforced constraint concrete superposed short column as claimed in claim 1, wherein: the ring ribs (5) are bound on the short longitudinal ribs (6) to form a whole.
7. The unequal-strength beam-column joint based on the ring-rib-restrained concrete superposed short column is characterized by comprising the following construction methods:
binding and molding a column longitudinal bar (1), a column combined hoop bar (2), a ring bar (5) and a short longitudinal bar (6) according to a bar distribution diagram to form a reinforcement cage of the column, wherein a first layer of ring bar (5) is bound on the column combined hoop bar (2), and then the short bar (6) is bound on the ring bar (5);
binding and molding the plate reinforcement, the beam longitudinal reinforcement, the beam stirrups, the stirrups in the node core area, the ring reinforcement (5) and the short longitudinal reinforcement (6) according to the reinforcement distribution diagram to form a beam plate and a reinforcement cage in the node core area;
step three, pouring second strength grade concrete (4) of the lower column;
pouring first strength grade concrete (3) of the node core area and the beam slab;
and step five, repeating the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111629902.8A CN114016605A (en) | 2021-12-29 | 2021-12-29 | Unequal-strength beam column joint based on ring rib constraint concrete superposed short column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111629902.8A CN114016605A (en) | 2021-12-29 | 2021-12-29 | Unequal-strength beam column joint based on ring rib constraint concrete superposed short column |
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| CN114016605A true CN114016605A (en) | 2022-02-08 |
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| CN202111629902.8A Pending CN114016605A (en) | 2021-12-29 | 2021-12-29 | Unequal-strength beam column joint based on ring rib constraint concrete superposed short column |
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Citations (6)
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| CN100999913A (en) * | 2007-01-05 | 2007-07-18 | 华南理工大学 | Node of steel tube concrete pole and steel reinforced concrete beam and processing method thereof |
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| CN106088479A (en) * | 2016-08-16 | 2016-11-09 | 重庆市晟庄建材有限责任公司 | A kind of processing method of prestressed high strength concrete steel reinforcement cage |
| CN107060211A (en) * | 2017-05-08 | 2017-08-18 | 姚攀峰 | A kind of reinforced concrete sandwich formula tubing string, superposed type core pipe post and its construction method |
| CN108775084A (en) * | 2018-07-09 | 2018-11-09 | 东南大学 | Steel-concrete combines precast beam and prefabricated post connection structure and construction method |
| US20200040564A1 (en) * | 2016-10-17 | 2020-02-06 | South China University Of Technology | Reinforced compound concrete beam-column joint containing demolished concrete lumps and a construction method |
-
2021
- 2021-12-29 CN CN202111629902.8A patent/CN114016605A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999913A (en) * | 2007-01-05 | 2007-07-18 | 华南理工大学 | Node of steel tube concrete pole and steel reinforced concrete beam and processing method thereof |
| CN102425238A (en) * | 2011-12-28 | 2012-04-25 | 中建一局集团第二建筑有限公司 | Node of steel pipe concrete superposed column and frame beam and construction method thereof |
| CN106088479A (en) * | 2016-08-16 | 2016-11-09 | 重庆市晟庄建材有限责任公司 | A kind of processing method of prestressed high strength concrete steel reinforcement cage |
| US20200040564A1 (en) * | 2016-10-17 | 2020-02-06 | South China University Of Technology | Reinforced compound concrete beam-column joint containing demolished concrete lumps and a construction method |
| CN107060211A (en) * | 2017-05-08 | 2017-08-18 | 姚攀峰 | A kind of reinforced concrete sandwich formula tubing string, superposed type core pipe post and its construction method |
| CN108775084A (en) * | 2018-07-09 | 2018-11-09 | 东南大学 | Steel-concrete combines precast beam and prefabricated post connection structure and construction method |
Non-Patent Citations (1)
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| 张加宾: "梁柱节点混凝土不等强施工技术", 《铁道建筑技术》 * |
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Application publication date: 20220208 |