CN112196101A - UHPC-based assembled frame beam column connecting node - Google Patents
UHPC-based assembled frame beam column connecting node Download PDFInfo
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- CN112196101A CN112196101A CN202011205902.0A CN202011205902A CN112196101A CN 112196101 A CN112196101 A CN 112196101A CN 202011205902 A CN202011205902 A CN 202011205902A CN 112196101 A CN112196101 A CN 112196101A
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- uhpc
- precast concrete
- concrete square
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 58
- 239000011178 precast concrete Substances 0.000 claims abstract description 55
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract 2
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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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
- E04B1/21—Connections specially adapted therefor
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, 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
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, 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
- E04H9/025—Structures with concrete columns
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses an assembled frame beam-column connection node based on UHPC (ultra high performance concrete), which comprises a precast concrete square column, a plurality of reserved channels, a plurality of precast concrete square beams, a plurality of lap-joint reinforcing steel bars, a plurality of beam longitudinal reinforcing steel bars and a plurality of UHPC post-pouring areas, wherein the precast concrete square column is vertically placed on the ground, the precast concrete square beams are placed on two sides of the precast concrete square column, the precast concrete square column and the precast concrete square beam are connected through the UHPC post-pouring areas, the lap-joint reinforcing steel bars penetrate through the reserved channels and the UHPC post-pouring areas in the precast concrete square column, the beam longitudinal reinforcing steel bars penetrate through the precast concrete square beam and the UHPC post-pouring areas, and the beam longitudinal reinforcing steel bars and the lap-joint reinforcing steel bars are in lap-pouring of the UHPC areas. According to the invention, the UHPC is used at the beam end to enable the beam end plastic hinge to move outwards, so that the shearing force borne by the node core area can be reduced, the rotation capacity and the shearing resistance of the node test piece in the plastic hinge area are enhanced, and the ductility and the energy consumption capacity of the node are improved.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to an assembled frame beam-column connecting node based on UHPC.
Background
Multiple major earthquake experiences at home and abroad show that a plastic hinge area is generally generated at a beam end under the action of an earthquake, and the nonlinear deformation of the plastic hinge area at the beam end causes concrete cracking, structural deformability and bearing capacity reduction in a node core area, so that the overall structure is damaged.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an assembled frame beam-column connection node based on UHPC (ultra high performance concrete), which utilizes the excellent tensile, compressive and shear resistance of the UHPC to enable a beam end to be in plastic hinge away from a column, reduces the shear force borne by a node core area, and enhances the rotation capacity and the shear resistance of a node test piece in the plastic hinge area, thereby improving the ductility and the energy consumption capacity of the node.
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: the utility model provides an assembled frame beam column connected node based on UHPC which characterized in that: the prefabricated concrete post-cast structure comprises a prefabricated concrete square column 1, a plurality of reserved channels 11, a plurality of prefabricated concrete square beams 2, a plurality of beam longitudinal bars 21, a plurality of lap-joint reinforcing bars 3 and a plurality of UHPC post-cast areas 4;
the precast concrete square column 1 is provided with two reserved channels 11; the precast concrete square beam 2 is provided with a plurality of beam longitudinal ribs 21;
the precast concrete square column is characterized in that the precast concrete square column 1 is vertically placed on the ground, the precast concrete square beams 2 are placed on two sides of the precast concrete square column 1, the precast concrete square column 1 and the precast concrete square beams 2 are connected through a UHPC post-casting area 4, the lap-joint reinforcing steel bars 3 penetrate through a reserved channel 11 and the UHPC post-casting area 4 in the precast concrete square column 1, the beam longitudinal reinforcing steel bars 21 extend out of the precast concrete square beams 2, and the outer extension parts of the beam longitudinal reinforcing steel bars 21 and the lap-joint reinforcing steel bars 3 are in lap-joint connection in the post-casting UHPC area 4.
Preferably, the reserved channel 11 penetrates through the precast concrete square column 1, the width of the reserved channel 1 is consistent with that of the precast concrete square beam 2, and the thickness of the reserved channel is larger than the diameter of the beam longitudinal rib 21.
Preferably, the lap-joint distance between the beam longitudinal bar 21 and the lap-joint reinforcing steel bar 3 in the post-cast UHPC area 4 is 10-15 times of the diameter of the beam longitudinal bar 21.
Preferably, the reserved channel 11 and the post-cast UHPC area 4 are cast with UHPC materials in situ.
Preferably, the cross section size of the post-cast UHPC area 4 is consistent with that of the precast concrete square beam 1, and the length of the post-cast UHPC area 4 is required to be larger than the lap joint distance between the beam longitudinal bar 21 and the lap joint reinforcing bar 3.
Preferably, the diameter of the overlap reinforcing bar 3 is consistent with that of the beam longitudinal bar 21.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
the UHPC is used at the beam end, and the excellent compression resistance, tensile resistance and shear resistance of the UHPC are utilized, so that the beam end plastic hinge moves outwards, the shear force borne by the node core area can be reduced, the rotation capacity and the shear resistance of the node test piece in the plastic hinge area are enhanced, and the ductility and the energy consumption capacity of the node are improved.
Drawings
FIG. 1 is a schematic plan view of an assembled frame beam-column connection node of the present invention;
FIG. 2 is a three-dimensional schematic view of an assembled frame beam-column connection node of the present invention;
fig. 3 is a three-dimensional schematic view of a precast concrete square column according to the present invention.
In the figure: 1-precast concrete square column, 11-reserved channel, 2-precast concrete square beam, 21-beam longitudinal bar, 3-lap joint reinforcing bar and 4-UHPC post-cast area.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the invention relates to an assembled frame beam-column connection node based on UHPC (ultra high performance concrete), which is characterized by comprising a precast concrete square column, a plurality of reserved channels, a plurality of precast concrete square beams, a plurality of lap-jointed reinforcing steel bars, a plurality of beam longitudinal reinforcing steel bars and a plurality of UHPC post-cast areas; the precast concrete square column is vertically placed on the ground, the precast concrete square beams are placed on two sides of the precast concrete square column, the precast concrete square column and the precast concrete square beams are connected through a UHPC post-pouring area, the lap-joint reinforcing steel bars penetrate through a reserved channel in the precast concrete square column and the UHPC post-pouring area, the lap-joint reinforcing steel bars and the precast concrete square column are fixedly connected through the reserved channel, the beam longitudinal reinforcing steel bars penetrate through the precast concrete square beams and the UHPC post-pouring area, and the beam longitudinal reinforcing steel bars and the lap-joint reinforcing steel bars are in lap-joint connection in the UHPC post-pouring area.
Furthermore, each precast concrete square column is provided with two reserved channels, the reserved channels penetrate through the precast concrete square columns, and the width of each reserved channel is consistent with that of each precast concrete square beam.
Furthermore, the lap joint distance between the beam longitudinal bar and the lap joint steel bar in the post-cast UHPC area is 10-15 times of the diameter of the beam longitudinal bar.
Furthermore, UHPC materials are cast in situ in the reserved channel and the post-cast UHPC area.
Furthermore, the cross section size of the UHPC post-cast area is consistent with that of the precast concrete square beam, and the length of the UHPC post-cast area needs to be larger than the lap joint distance of the beam longitudinal bars and the lap joint reinforcing bars.
Furthermore, the diameter of the lap steel bar is consistent with that of the beam longitudinal bar.
Referring to fig. 1 to 3, the construction method of the present invention includes the steps of:
the method comprises the following steps: the precast concrete square column 1 and the precast concrete square beam 2 are manufactured in a factory and transported to a site for hoisting;
step two: the overlap joint reinforcing steel bar 3 penetrates through the reserved channel 11 and is placed at the position shown in figure 1, and then the beam longitudinal bar 21 and the overlap joint reinforcing steel bar 3 are bound and connected;
step three: pouring a UHPC material in the reserved channel 11 to complete the connection of the lapped steel bars 3 and the precast concrete square column 1;
step four: and pouring a UHPC material in the post-pouring UHPC area 4 to complete the joint connection.
Step five: and repeating the first step to the fourth step to complete the manufacture of the integral frame.
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 (6)
1. An assembled frame beam column connection node based on UHPC is characterized by comprising a precast concrete square column, a plurality of reserved channels, a plurality of precast concrete square beams, a plurality of lap-jointed reinforcing steel bars, a plurality of beam longitudinal reinforcing steel bars and a plurality of UHPC post-cast areas; the precast concrete square column is vertically placed on the ground, the precast concrete square beams are placed on two sides of the precast concrete square column, the precast concrete square column and the precast concrete square beams are connected through a UHPC post-pouring area, the lap-joint reinforcing steel bars penetrate through a reserved channel in the precast concrete square column and the UHPC post-pouring area, the beam longitudinal reinforcing steel bars penetrate through the precast concrete square beam and the UHPC post-pouring area, and the beam longitudinal reinforcing steel bars and the lap-joint reinforcing steel bars are in lap-joint connection in the UHPC post-pouring area.
2. An UHPC-based assembled frame beam column connection node as claimed in claim 1 wherein the precast concrete square column is provided with two pre-channels running through the precast concrete square column, the pre-channels having a width corresponding to the width of the precast concrete square beam.
3. The UHPC-based assembled frame beam-column connection node of claim 1, wherein the lap distance between the beam longitudinal bars and the lap bars in the post-cast UHPC area is 10-15 times the diameter of the beam longitudinal bars.
4. The UHPC-based assembled frame beam and column connection node of claim 1, wherein the pre-channels and post-cast UHPC areas are cast-in-place with UHPC material.
5. The UHPC-based assembled frame beam-column connection node as claimed in claim 1 or 3, wherein the cross-sectional dimension of the UHPC post-cast area is consistent with that of the precast concrete square beam, and the length of the UHPC post-cast area is larger than the lap joint distance of the longitudinal beam ribs and the lap joint reinforcing steel bars.
6. A UHPC-based fabricated frame beam-column connection node in accordance with claim 1, wherein the lap-joint reinforcement diameter is identical to the beam longitudinal reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011205902.0A CN112196101A (en) | 2020-11-02 | 2020-11-02 | UHPC-based assembled frame beam column connecting node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011205902.0A CN112196101A (en) | 2020-11-02 | 2020-11-02 | UHPC-based assembled frame beam column connecting node |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112196101A true CN112196101A (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011205902.0A Pending CN112196101A (en) | 2020-11-02 | 2020-11-02 | UHPC-based assembled frame beam column connecting node |
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| Country | Link |
|---|---|
| CN (1) | CN112196101A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204850069U (en) * | 2015-08-12 | 2015-12-09 | 四川省建筑设计研究院 | Prefabricated beam column connected node among assembled concrete building |
| CN105863047A (en) * | 2016-05-10 | 2016-08-17 | 上海理工大学 | Prefabricated concrete beam column joint and construction method |
| CN109989478A (en) * | 2019-02-22 | 2019-07-09 | 同济大学 | A kind of precast prestressed concrete frame structure |
| AU2020100080A4 (en) * | 2020-01-16 | 2020-02-20 | Yangzhou University | Locally Strengthened Prefabricated Concrete Frame Beam-column Connection Joint |
| CN213773781U (en) * | 2020-11-02 | 2021-07-23 | 湖南大学 | UHPC-based assembled frame beam column connecting node |
-
2020
- 2020-11-02 CN CN202011205902.0A patent/CN112196101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204850069U (en) * | 2015-08-12 | 2015-12-09 | 四川省建筑设计研究院 | Prefabricated beam column connected node among assembled concrete building |
| CN105863047A (en) * | 2016-05-10 | 2016-08-17 | 上海理工大学 | Prefabricated concrete beam column joint and construction method |
| CN109989478A (en) * | 2019-02-22 | 2019-07-09 | 同济大学 | A kind of precast prestressed concrete frame structure |
| AU2020100080A4 (en) * | 2020-01-16 | 2020-02-20 | Yangzhou University | Locally Strengthened Prefabricated Concrete Frame Beam-column Connection Joint |
| CN213773781U (en) * | 2020-11-02 | 2021-07-23 | 湖南大学 | UHPC-based assembled frame beam column connecting node |
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