CN211775090U - Profile steel tongue-and-groove for precast concrete beam - Google Patents
Profile steel tongue-and-groove for precast concrete beam Download PDFInfo
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- CN211775090U CN211775090U CN201922402092.7U CN201922402092U CN211775090U CN 211775090 U CN211775090 U CN 211775090U CN 201922402092 U CN201922402092 U CN 201922402092U CN 211775090 U CN211775090 U CN 211775090U
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Abstract
The utility model relates to a shaped steel tongue-and-groove for precast concrete beam, including steel pipe (1), lacing wire (2) and dowel (3), be equipped with stiffening steel sheet (12) in steel pipe (1) both ends, stiffening steel sheet (12) welding is in on the pipe wall of steel pipe (1), lacing wire (2) are including vertical section (22) and horizontal segment (23) connected through curved arc section (21), vertical section (22) welding is in steel pipe (1) both sides, dowel (3) horizontal welding is kept away from in steel pipe (1) the position that the both sides lower part of the one end of lacing wire (2) is close to the bottom surface. Compared with the prior art, the utility model has the advantages of alleviate girder and secondary beam bearing, alleviate steel pipe self weight, improve the efficiency of construction.
Description
Technical Field
The utility model belongs to the technical field of civil engineering technique and specifically relates to a shaped steel tongue-and-groove for precast concrete beam is related to.
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: firstly, a key groove is arranged on a primary beam and a secondary beam, and the primary beam and the secondary beam are connected through post-cast concrete; the second is that 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.
The application number 2019113323403 discloses a section steel concrete tongue-and-groove for precast concrete beam, which pours concrete into a steel tube in advance, cancels the construction link of pouring concrete at the position of a previous beam and a key groove, improves the construction efficiency, but the use of concrete causes the problem that the main beam and the secondary beam have larger bearing capacity.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a precast concrete is shaped steel tongue-and-groove for roof beam in order to overcome the construction degree of difficulty that above-mentioned prior art exists big, be difficult for hoist and mount construction, girder and the great defect of secondary beam bearing burden and provide.
The purpose of the utility model can be realized through the following technical scheme:
the steel pipe is embedded in a secondary beam, stiffening steel plates are arranged at two ends of the steel pipe and welded on the pipe wall of the steel pipe, each stiffening steel plate comprises a vertical section and a horizontal section which are connected through a bent arc section, the vertical sections are welded on two sides of the steel pipe, and the anchor bars are horizontally welded on the positions, close to the bottom surface, of the lower parts of two sides of one end, far away from the stiffening steel, of the steel pipe.
The steel pipe is divided into a cantilever section and an embedded section by the precast concrete beam end face of the secondary beam.
The welding positions of the stiffening steel plates on the cantilever sections are two trisection points of the cantilever sections, and the welding positions of the stiffening steel plates in the embedded sections are axisymmetric with the welding positions of the cantilever sections about the central axis of the steel pipe.
The thickness of the stiffening steel plate is 10-20 mm.
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 diameters of the tie bars and the anchor bars are both 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.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses an add the steel sheet of putting more energy into in the rectangular steel pipe of clod wash, improve steel pipe rigidity when preventing the steel pipe unstability, alleviateed the weight of rectangular steel pipe of clod wash simultaneously, improved the security and the life of rectangular steel pipe of clod wash.
2. The utility model discloses cancelled the construction link of pouring concrete to last roof beam and keyway department, improved the efficiency of construction.
3. The utility model discloses a both sides at the clod wash rectangle steel pipe set up the lacing wire, make the secondary beam can shelve on the girder, realize the articulated connection of primary and secondary beam, the design of lacing wire has replaced the girder and has chosen the ear, has alleviateed girder and secondary beam bearing.
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 the U-shaped anchor bar of the present invention;
FIG. 4 is a schematic view of the straight anchor bar of the present invention;
fig. 5 is a schematic view of the hook anchor bar 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 the calculation model of the present invention.
Reference numerals:
1-a steel pipe; 11-a cantilever section; 12-a stiffening steel plate; 13-a buried section; 2-stretching the ribs; 21-bending arc section; 22-a vertical section; 23-horizontal section; 3-anchor bars.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The 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, a section steel tongue-and-groove for a 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, stiffening steel plates 12 are arranged at two ends of the steel pipe 1, the stiffening steel plates 12 are welded with four walls of the steel pipe 1 through single-side welding lines after being chamfered, 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 at two sides of the steel pipe 1, and the anchor bar 3 is horizontally welded at a position, close to the bottom surface, of the lower parts of two sides of one end, far away from the tie bar 2.
The steel pipe 1 is divided into a cantilever section 11 and an embedded section 13 by the precast concrete beam end face of the secondary beam.
The welding positions of the stiffening steel plates 12 on the cantilever sections 11 are two trisection points of the cantilever sections 11, and the welding positions of the stiffening steel plates 12 in the embedded sections 13 are axisymmetric with the welding positions of the cantilever sections 11 about the central axis of the steel pipe 1.
The stiffening steel plate 12 is Q235 or Q345, and the thickness is 10-20 mm.
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 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 length of the vertical section (excluding the welding part) of the lacing bar 2 is 0-la, the length of the horizontal section is 0-1.6 la, and la is the anchoring length of the tensioned steel bar.
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 segment 11, b is the distance from the center of the tie bar 2 to the cantilever segment 11, and l is the total length of the steel pipe 1; v is a shear design value of the cantilever section 11, and the action point is positioned in the middle of the cantilever section 11; t is a design value of the tensile force of the cantilever section 11; 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; vcThe design value of the uniform distribution counter force of the embedded section 13 is the design value of the shearing force of the cantilever section, the action point is the symmetrical part of the action point of the shearing force of the cantilever section about the central axis of the steel pipe 1, and the design value of the tensile force of the lacing wire 2 is V after analysissV (l-a)/(l-3a/2-b), design tension T of tendon 3sDesigned value of uniform reaction force V of embedded section 13 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 stiffening steel plate 12 is Q235B level steel, and the length of side is 90mm, and thickness is 10mm, and 5mm fillet size is made at the four corners, and four sides and the inner wall of steel pipe 1 adopt E43 welding rod full weld, and the leg size is 4 mm.
The lacing wire 2 adopts HRB400 steel bar with the diameter of 16mm, and is connected with the steel pipe 1 by adopting shielded metal arc welding, the shielded metal arc welding adopts E43 shielded metal, the welding seam length is 90mm, the leg size is 4mm, the distance from the center of the lacing wire 2 to the cantilever section 11 is 30mm, the length of the vertical section 22 (not including the welding part) of the lacing wire is 140mm, the length of the horizontal section 23 is 560mm, the bending angle is 90 degrees, and the inner diameter of the bending arc 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 shapes of the components, the names of the components, and the like of the specific embodiments described in the present specification may be different, and the above description is only an example of the structure of the present invention. All minor or simple changes made according to the structure, characteristics and principles of the present invention are included in the protection scope of the present invention. Various modifications or additions may be made to the described embodiments or similar methods may be adopted by those skilled in the art without departing from the scope of the invention as defined in the claims.
Claims (9)
1. The section steel rabbet for the precast concrete beam is characterized by comprising a steel pipe (1), a tie bar (2) and anchor bars (3), wherein the steel pipe (1) is buried in a secondary beam, stiffening steel plates (12) are arranged at two ends of the steel pipe (1), the stiffening steel plates (12) are welded on the pipe wall of 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 bars (3) are horizontally welded at positions, close to the bottom surface, of the lower parts of two sides of one end, far away from the tie bar (2), of the steel pipe (1).
2. A profiled bar rebate for precast concrete beams according to claim 1, wherein the steel duct (1) is divided into a cantilever section (11) and a buried section (13) by the precast concrete beam end face of the secondary beam.
3. The profiled bar tongue-and-groove for a precast concrete beam as claimed in claim 2, wherein the welding position of the stiffening steel plate (12) at the cantilever section (11) is two trisection points of the cantilever section (11), and the welding position of the stiffening steel plate (12) in the embedded section (13) is axisymmetrical to the welding position of the cantilever section (11) about the central axis of the steel pipe (1).
4. The profiled bar tongue-and-groove for a precast concrete beam as claimed in claim 1, wherein the thickness of the stiffening steel plate (12) is 10 to 20 mm.
5. The profiled bar tongue-and-groove for a precast concrete beam according to claim 1, wherein the steel pipe (1) is a cold-formed rectangular steel pipe.
6. The section steel tongue-and-groove for a precast concrete beam according to claim 5, wherein the height of the cold-formed rectangular steel pipe is 100 to 200 mm, and the wall thickness is 4 to 16 mm.
7. The profiled bar tongue-and-groove for the precast concrete beam as claimed in claim 1, wherein the diameter of the tie bar (2) and the anchor bar (3) is 10-36 mm.
8. The profiled bar tongue-and-groove for a precast concrete beam as claimed in 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 length, and the bent arc section (21) has an inner diameter length less than 10 times of the diameter length of the vertical section (22) and the horizontal section (23).
9. The profiled bar tongue-and-groove for a precast concrete beam according to claim 1, wherein the anchor bars (3) comprise U-shaped anchor bars, straight anchor bars, hook anchor bars or anchor plate anchor bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402092.7U CN211775090U (en) | 2019-12-27 | 2019-12-27 | Profile steel tongue-and-groove for precast concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402092.7U CN211775090U (en) | 2019-12-27 | 2019-12-27 | Profile steel tongue-and-groove for precast concrete beam |
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| CN211775090U true CN211775090U (en) | 2020-10-27 |
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| CN201922402092.7U Active CN211775090U (en) | 2019-12-27 | 2019-12-27 | Profile steel tongue-and-groove for precast concrete beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075110A (en) * | 2019-12-27 | 2020-04-28 | 同济大学 | Profile steel tongue-and-groove for precast concrete beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075110A (en) * | 2019-12-27 | 2020-04-28 | 同济大学 | Profile steel tongue-and-groove for precast concrete beam |
| CN111075110B (en) * | 2019-12-27 | 2024-02-27 | 同济大学 | Profile steel tongue-and-groove for precast concrete beam |
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Effective date of registration: 20230506 Address after: 5 / F, building 7, 3601 Dongfang Road, Pudong New Area, Shanghai Patentee after: TIANHUA ARCHITECTURE DESIGN Co.,Ltd. Address before: 200092 Siping Road 1239, Shanghai, Yangpu District Patentee before: TONGJI University |