CN111042436A - Section steel concrete tongue-and-groove for precast concrete beam - Google Patents
Section steel concrete tongue-and-groove for precast concrete beam Download PDFInfo
- Publication number
- CN111042436A CN111042436A CN201911332340.3A CN201911332340A CN111042436A CN 111042436 A CN111042436 A CN 111042436A CN 201911332340 A CN201911332340 A CN 201911332340A CN 111042436 A CN111042436 A CN 111042436A
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- steel pipe
- steel
- section
- groove
- concrete
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 239000004567 concrete Substances 0.000 title claims abstract description 27
- 239000011178 precast concrete Substances 0.000 title claims abstract description 17
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 17
- 238000003466 welding Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 210000002435 tendon Anatomy 0.000 description 4
- 238000007778 shielded metal arc welding Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- 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
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a section steel concrete tongue-and-groove for a precast concrete beam, which comprises a steel pipe (1), a tie bar (2) and an anchor bar (3), wherein the steel pipe (1) is embedded in a secondary beam, concrete (11) is filled in the steel pipe (1), the tie bar (2) comprises a vertical section (22) and a horizontal section (23) which are connected through a bent arc section (21), the vertical section (22) is welded on two sides of the steel pipe (1), and the anchor bar (3) is horizontally welded on the lower parts of two sides of one end, far away from the tie bar (2), of the steel pipe (1) and is close to the bottom surface. Compared with the prior art, the invention has the advantages of high bearing capacity, simple processing and manufacturing, high component installation efficiency and the like.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a section steel concrete tongue-and-groove for a precast concrete beam.
Background
In the laminated floor system with the prefabricated concrete structure, the main beam and the secondary beam are hinged. The hinge connection mainly includes two types:
(1) the main beam and the secondary beam are provided with key grooves and are connected with the secondary beam through post-cast concrete;
(2) the main beam is provided with a cantilever lug, and the secondary beam is provided with a concrete rabbet for placing connection;
the first method has the characteristics of high construction difficulty due to the fact that concrete is poured later, and is not in line with the characteristics of simplicity and quickness of an assembled concrete structure; in the second method, the main beam is provided with the cantilever lugs to be used as the placing support of the secondary beam rabbet, so that the weight of the main beam is increased, and the hoisting construction is not easy.
Disclosure of Invention
The invention aims to provide a section steel concrete tongue-and-groove for a precast concrete beam to overcome the defects of high construction difficulty, difficulty in hoisting construction and the like in the prior art.
The purpose of the invention can be realized by the following technical scheme:
the steel reinforced concrete tongue-and-groove for the precast concrete beam comprises a steel pipe, a tie bar and an anchor bar, wherein the steel pipe is embedded in a secondary beam, concrete is filled in the steel pipe, the tie bar comprises a vertical section and a horizontal section which are connected through a bent arc section, the vertical section is welded on two sides of the steel pipe, and the anchor bar is horizontally welded on the position, close to the bottom surface, of the lower parts of two sides of one end, far away from the tie bar, of the steel pipe.
Preferably, the steel pipe is a cold-formed rectangular steel pipe.
The height of the cold-bending rectangular steel pipe is 100-200 mm, and the wall thickness is 4-16 mm.
Preferably, the tie bars and the anchor bars are hot-rolled ribbed steel bars.
The anchor bars have a diameter of 10-36 mm.
The diameter of the lacing wire is 10-36 mm.
Preferably, the bending angle of the bending arc section is 90 degrees, the diameter lengths of the vertical section and the horizontal section are the same, and the inner diameter length of the bending arc section is less than 10 times of the diameter lengths of the vertical section and the horizontal section.
Preferably, the anchor bars comprise U-shaped anchor bars, straight anchor bars, hook anchor bars or anchor plate anchor bars.
Preferably, the strength grade of the concrete is C30-C50.
Compared with the prior art, the invention has the following beneficial effects:
1. the construction process cancels the construction link of post-pouring concrete to the primary and secondary beam joints, and improves the construction efficiency.
2. The invention cancels the girder lifting lug and reduces the weight of the girder.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of a U-shaped tendon according to the present invention;
FIG. 4 is a schematic view of a straight tendon according to the present invention;
FIG. 5 is a schematic view of a hook anchor of the present invention;
FIG. 6 is a schematic view of the anchor bars of the anchor plate of the present invention;
FIG. 7 is a schematic diagram of a computational model of the present invention.
Reference numerals:
1-a steel pipe; 11-concrete; 2-stretching the ribs; 21-bending arc section; 22-a vertical section; 23-horizontal section; 3-anchor bars.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the section steel concrete tongue-and-groove for the precast concrete beam comprises a steel pipe 1, a tie bar 2 and an anchor bar 3, wherein the steel pipe 1 is buried in a secondary beam, the steel pipe 1 is filled with concrete 11, the strength grade of the concrete 11 is C30-C50, the tie bar 2 comprises a vertical section 22 and a horizontal section 23 which are connected through a bent arc section 21, as shown in fig. 2, the vertical section 22 is welded on two sides of the steel pipe 1, the steel pipe 1 is divided into a cantilever section and a buried section by the precast concrete beam end surface of the secondary beam, the welding process is shielded metal arc welding, and the anchor bar 3 is horizontally welded on the lower parts of two sides of one end, far away from the tie bar 2, of the steel pipe 1, close.
The steel pipe 1 is a cold-bending rectangular steel pipe, the height of the cold-bending rectangular steel pipe is 100-200 mm, and the wall thickness is 4-16 mm.
The length of the vertical section (excluding the welding part) of the lacing bar 2 is 0 to laThe length of the horizontal section is 0-1.6 la，laIs the length of the tendon anchor.
The tie bar 2 and the anchor bar 3 are both hot-rolled ribbed steel bars, and the corresponding welding processes are both welding rod arc welding and are connected with the steel pipe 1 through welding seams at two sides.
The tie bars 2 and the anchor bars 3 are both HRB400 or HRB500 series steel bars, and comprise HRB400, HRB400E, HRBF400E, HRB500E, HRBF500 and HRBF500E, and the diameter of each tie bar is 10-36 mm.
The bending angle of the bending arc section 21 is 90 degrees, the diameter lengths of the vertical section 22 and the horizontal section 23 are the same, and the inner diameter length of the bending arc section 21 is less than 10 times of the diameter lengths of the vertical section 22 and the horizontal section 23.
The anchor bars 3 comprise four forms of U-shaped anchor bars, straight anchor bars, hook anchor bars or anchor plate anchor bars.
As shown in FIG. 3, the length of the straight section (excluding the welded portion) of the U-shaped anchor bar was 0.6laThe bending angle is 180 degrees, and the inner diameter of the bending arc section of the anchor bar is half of the width of the steel pipe; as shown in fig. 4, the straight anchor bar (excluding the welded portion) has a length la(ii) a As shown in FIG. 5, the hook angle of the hook anchor is 135 °, the hook inner diameter is 2d, the length of the straight line section after bending is 5d, d is the diameter of the horizontal hook anchor, and the length of the hook anchor (excluding the welded portion) is 0.6la(ii) a As shown in FIG. 6, the anchor plate anchor bars (excluding the welded portions) had a length of 0.6la。
As shown in fig. 7, a is the length of the cantilever section of the steel pipe 1, b is the distance from the center of the tie bar 2 to the cantilever section, and l is the total length of the steel pipe 1; v is the design value of the shearing force of the cantilever section of the steel pipe 1, and the action point is positioned in the middle of the cantilever section; t is the design value of the tensile force of the cantilever section of the steel pipe 1; vsThe design value of the tension of the lacing wire 2 is obtained; t issThe design value of the tension of the anchor bar 3 is obtained; vcUniformly distributing a reaction design value for an embedded section of the steel pipe 1, wherein an action point is a symmetrical part of the action point of the shear design value of the cantilever section about the central axis of the steel pipe 1, and the design value of the tension of the lacing wire 2 is V after analysissV (l-a)/(l-3a/2-b), design tensile force of the tendon 3TsEqual distribution of counter force design value V at embedded section of steel pipe 1 as TcV (a/2+ b)/(l-3a/2-b), the sustainable reaction force of the support is specifically 0-600 kN.
Example one
The steel pipe 1 adopts a cold-bending rectangular steel pipe with the model number of Q235B-100 multiplied by 4(I/Z) -JG/T178-; the strength grade of the filled concrete is C40.
The lacing wire 2 adopts HRB400 steel bar with the diameter of 16mm, and adopts shielded metal arc welding to be connected with the steel pipe 1, the welding rod adopts E43 welding rod, the welding seam length is 90mm, the leg size is 4mm, the distance between the center of the lacing wire 2 and the cantilever section is 30mm, the length of the vertical section 22 (excluding the welding part) of the lacing wire 2 is 140mm, the length of the horizontal section 23 is 560mm, the bending angle is 90 degrees, and the bending inner diameter is 100 mm.
The anchor 3 adopts the U-shaped anchor, and the U-shaped anchor adopts the HRB400 reinforcing bar that the diameter is 16mm, adopts shielded metal arc welding to be connected with steel pipe 1, and the welding rod adopts E43 welding rod, and weld length is 90mm, and the leg size is 4mm, and 3 straight sections of anchor (not including the welding part) length are 300mm, and the angle of bending arc is 180, and the internal diameter is 50 mm.
In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. Minor or simple variations in the structure, features and principles of the present invention are included within the scope of the present invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.
Claims (9)
1. The steel reinforced concrete tongue-and-groove for the precast concrete beam is characterized by comprising a steel pipe (1), a tie bar (2) and an anchor bar (3), wherein the steel pipe (1) is buried in a secondary beam, concrete (11) is filled in the steel pipe (1), the tie bar (2) comprises a vertical section (22) and a horizontal section (23) which are connected through a bent arc section (21), the vertical section (22) is welded on two sides of the steel pipe (1), and the anchor bar (3) is horizontally welded on the lower portions of two sides of one end, far away from the tie bar (2), of the steel pipe (1) and close to the bottom surface.
2. The profiled steel concrete tongue-and-groove for a precast concrete beam according to claim 1, wherein the steel tube (1) is a cold-bent rectangular steel tube.
3. The section steel concrete tongue-and-groove for the precast concrete beam according to claim 2, wherein the height of the cold-formed rectangular steel pipe is 100-200 mm, and the wall thickness is 4-16 mm.
4. The profiled steel concrete tongue-and-groove for a precast concrete beam according to claim 1, wherein the tie bar (2) and the anchor bar (3) are both hot rolled ribbed steel bars.
5. The profiled steel concrete tongue-and-groove for the precast concrete beam as claimed in claim 1, wherein the diameter of the anchor bar (3) is 10-36 mm.
6. The profiled steel concrete tongue-and-groove for the precast concrete beam as claimed in claim 1, wherein the diameter of the tie bar (2) is 10-36 mm.
7. The steel reinforced concrete tongue-and-groove for the precast concrete beam according to claim 1, wherein the bent arc section (21) has a bent arc angle of 90 °, the vertical section (22) and the horizontal section (23) have the same diameter and length, and the bent arc section (21) has an inner diameter and length less than 10 times of the diameter and length of the vertical section (22) and the horizontal section (23).
8. The profiled bar concrete tongue-and-groove for a precast concrete beam according to claim 1, wherein the anchor bars (3) include U-shaped anchor bars, straight anchor bars, hook anchor bars or anchor plate anchor bars.
9. The steel reinforced concrete tongue-and-groove for a precast concrete beam according to claim 1, wherein the strength grade of the concrete (11) is C30-C50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911332340.3A CN111042436B (en) | 2019-12-22 | 2019-12-22 | Profile steel concrete tongue-and-groove for precast concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911332340.3A CN111042436B (en) | 2019-12-22 | 2019-12-22 | Profile steel concrete tongue-and-groove for precast concrete beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111042436A true CN111042436A (en) | 2020-04-21 |
| CN111042436B CN111042436B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911332340.3A Active CN111042436B (en) | 2019-12-22 | 2019-12-22 | Profile steel concrete tongue-and-groove for precast concrete beam |
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| Country | Link |
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| CN (1) | CN111042436B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962667A (en) * | 2020-08-27 | 2020-11-20 | 上海天华建筑设计有限公司 | Connecting device for precast concrete beam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203808261U (en) * | 2014-05-04 | 2014-09-03 | 长沙远大住宅工业有限公司 | Prefabricated superimposed main beam and auxiliary beam connecting member |
| CN204753843U (en) * | 2015-07-14 | 2015-11-11 | 江苏建筑职业技术学院 | PC primary and secondary roof beam bolted connection node |
| CN207878644U (en) * | 2018-01-24 | 2018-09-18 | 青岛腾远设计事务所有限公司 | A kind of double steel plate tongue and groove connecting node |
| CN208280325U (en) * | 2018-03-06 | 2018-12-25 | 广东省建筑设计研究院 | The prefabricated assembled primary and secondary beam connecting node of building structure |
| CN208650259U (en) * | 2018-07-04 | 2019-03-26 | 湖北工业大学 | Girder preformed groove secondary beam back insertion type connecting joint structure |
| CN211775089U (en) * | 2019-12-22 | 2020-10-27 | 同济大学 | Section steel concrete tongue-and-groove for precast concrete beam |
-
2019
- 2019-12-22 CN CN201911332340.3A patent/CN111042436B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203808261U (en) * | 2014-05-04 | 2014-09-03 | 长沙远大住宅工业有限公司 | Prefabricated superimposed main beam and auxiliary beam connecting member |
| CN204753843U (en) * | 2015-07-14 | 2015-11-11 | 江苏建筑职业技术学院 | PC primary and secondary roof beam bolted connection node |
| CN207878644U (en) * | 2018-01-24 | 2018-09-18 | 青岛腾远设计事务所有限公司 | A kind of double steel plate tongue and groove connecting node |
| CN208280325U (en) * | 2018-03-06 | 2018-12-25 | 广东省建筑设计研究院 | The prefabricated assembled primary and secondary beam connecting node of building structure |
| CN208650259U (en) * | 2018-07-04 | 2019-03-26 | 湖北工业大学 | Girder preformed groove secondary beam back insertion type connecting joint structure |
| CN211775089U (en) * | 2019-12-22 | 2020-10-27 | 同济大学 | Section steel concrete tongue-and-groove for precast concrete beam |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962667A (en) * | 2020-08-27 | 2020-11-20 | 上海天华建筑设计有限公司 | Connecting device for precast concrete beam |
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| Publication number | Publication date |
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| CN111042436B (en) | 2024-03-26 |
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