CN117365015A - Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam - Google Patents
Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam Download PDFInfo
- Publication number
- CN117365015A CN117365015A CN202311162212.5A CN202311162212A CN117365015A CN 117365015 A CN117365015 A CN 117365015A CN 202311162212 A CN202311162212 A CN 202311162212A CN 117365015 A CN117365015 A CN 117365015A
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- Prior art keywords
- stirrup
- rear longitudinal
- downwarping
- stirrups
- diameter
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- 238000005452 bending Methods 0.000 claims abstract description 25
- 239000011241 protective layer Substances 0.000 claims abstract description 5
- 230000002787 reinforcement Effects 0.000 claims abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to the field of connection of general building structures, in particular to a connection structure of rear longitudinal ribs and downwarping stirrups at the upper part of a prefabricated superposed beam. The utility model provides a connection structure of post-arranged longitudinal reinforcement in precast superimposed beam upper portion and downwarping stirrup, includes lower warping stirrup (3) and upper portion post-arranged longitudinal reinforcement (4) of precast superimposed beam (1) that the upper portion exists down warping recess, characterized by: the two ends of the flexible stirrup (3) are bent at 90 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the lower flexible stirrup (3), and the lower flexible depth is larger than or equal to the sum of the diameters of the rear longitudinal ribs (4) and the lower flexible stirrup (3); the two ends of the upper rear longitudinal rib (4) are bent at 180 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the upper rear longitudinal rib (4), and the length of the straight section after bending is determined according to the diameter of the rear longitudinal rib (4); the distance between the outer edge of the upper rear longitudinal rib (4) and the concrete surface meets the requirement of the minimum protective layer thickness. The invention has the advantages of convenient operation and high construction efficiency.
Description
Technical Field
The invention relates to the field of connection of general building structures, in particular to a connection structure of rear longitudinal ribs and downwarping stirrups at the upper part of a prefabricated superposed beam.
Background
The traditional prefabricated laminated beam generally adopts a form of a closed stirrup for ensuring the mechanical property of the component, and the longitudinal ribs on the upper part of the prefabricated laminated beam need to pass through the closed stirrup for ensuring the thickness of the protective layer during installation, so that the problems of high construction difficulty coefficient, low efficiency and the like of the longitudinal ribs are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a connecting structure of a building structure, which is convenient to operate and high in construction efficiency, and discloses a connecting structure of rear longitudinal ribs and downwarping stirrups at the upper part of a prefabricated superposed beam.
The invention achieves the aim through the following technical scheme:
the connecting structure mainly comprises a stirrup with the upper part bent downwards and a stirrup with the upper part bent downwards, wherein the lower bending depth is larger than or equal to the sum of diameters of the rear longitudinal stirrup and the stirrup, the height of the rear longitudinal stirrup is kept consistent with that of the upper longitudinal stirrup of the traditional precast laminated beam, two ends of the stirrup at the lower bending section adopt a 90-degree bending mode, and the bending diameter is not smaller than 2.5 times of the diameter of the stirrup; the two ends of the upper part of the stirrup are bent at 180 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the stirrup, and the length of the straight section after bending is determined according to the diameter of the rear longitudinal bar; the longitudinal bars are placed in the grooves of the stirrups for downwarping, the height of the upper surface of each longitudinal bar is smaller than that of the lower surface of the 180-degree bending part of each stirrup, the surfaces at the lower ends of the longitudinal bars are clung to the upper surface of the downwarping section of each stirrup, and the surfaces at the outer sides of the longitudinal bars at the two sides are clung to the stirrups; the down-bending stirrup and the rear longitudinal bars are arranged in a multi-row longitudinal bar arrangement mode on the upper portion of the beam by changing the depth of the grooves and the parallel bar connection mode. The connecting structure of the rear longitudinal ribs and the down-warping stirrups at the upper part of the prefabricated laminated beam can be used after being adjusted according to stirrups with different diameters and the longitudinal ribs, so that on one hand, the distance between the outer edge of the rear longitudinal ribs and the surface of concrete can be ensured to meet the requirement of minimum protective layer thickness, and the overall mechanical property of the laminated beam is not influenced; on the other hand, the rear longitudinal bars are arranged outside the grooves of the stirrups in the downward bending mode of the precast beam through the downward bending mode of the stirrups, so that the rear longitudinal bars are prevented from penetrating through the closed stirrups of the precast beam, the construction difficulty is greatly reduced, and the construction efficiency is improved.
The connecting structure of the rear longitudinal ribs and the downwarping stirrups at the upper part of the prefabricated laminated beam provided by the invention avoids the problems of high construction difficulty, low construction efficiency and the like caused by the fact that the rear longitudinal ribs pass through the lower parts of the stirrups when the closed stirrups are adopted by the prefabricated laminated beam.
The invention has the following beneficial effects:
1. the invention has strong practicability, simple and understandable principle and easy popularization. The downwarping stirrup (3) used by the connecting structure is manufactured by bending the stirrup in a factory according to design files and specification requirements, and an additional device is not needed.
2. The operation is convenient, and the efficiency of construction is high. When in field construction, the rear longitudinal ribs (4) are only required to be placed in the grooves of the downwarping sections of the stirrups, and then the connection between the rear longitudinal ribs (4) and the stirrups is realized by adopting binding wires, so that construction difficulties caused by the fact that the rear longitudinal ribs (4) penetrate through the closed stirrups are avoided, and the field construction efficiency is improved.
3. The applicability is stronger. The downwarping depth of the downwarping stirrup (3) can be adjusted according to stirrups with different diameters and longitudinal bars, and the downwarping depth can be suitable for prefabricated laminated beams (1) with different sizes and different application scenes.
4. The height of the longitudinal ribs is consistent with that of the traditional beam. The down-warping depth of the stirrup is larger than or equal to the sum of the diameters of the rear longitudinal ribs (4) and the stirrup, so that the height of the rear longitudinal ribs (4) is ensured to be consistent with the height of the upper longitudinal ribs of the traditional prefabricated superposed beam (1).
5. The upper rear longitudinal bar (4) is connected with the down-flexible stirrup (3) through the modes of single filament plum blossom, single filament full binding, double filament plum blossom and the like, so that the same stress state as the traditional connection mode is realized.
6. By changing the groove depth of the downwarping stirrup (3) and the parallel connection mode, the arrangement of the steel bars under the condition of multi-row longitudinal bars at the upper part of the beam is realized.
Drawings
Fig. 1 is a cross-sectional view of a prefabricated composite beam of the present invention after placement of the rear longitudinal ribs.
Fig. 2 is a top view of the prefabricated laminated beam of the present invention after the placement of the rear longitudinal ribs.
Fig. 3 is a side view of the prefabricated laminated beam of the present invention after placement of the rear longitudinal ribs.
Reference numerals: 1-prefabricating a superposed beam; 2-post-pouring concrete; 3-down-flexing stirrups; 4, rear longitudinal ribs are arranged at the upper part of the prefabricated superposed beam; 5-prefabricating and overlapping Liang Yao ribs; 6-lower longitudinal ribs.
Description of the embodiments
The invention is further illustrated by the following specific examples.
Examples
Referring to fig. 1-3, the technical scheme provided in this embodiment is a connection structure between a rear longitudinal rib 4 at the upper part of a prefabricated laminated beam 1 and a down-warping stirrup 3, and the connection structure comprises the rear longitudinal rib 4 at the upper part of the prefabricated laminated beam 1 and the upper down-warping stirrup 3 pre-buried in the laminated beam.
Step one, producing a downwarping stirrup 3 in a prefabricated member production factory according to design files and related specification requirements, wherein two ends of the downwarping stirrup are bent by 90 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the stirrup, and the downwarping depth is larger than or equal to the sum of the rear longitudinal stirrup 4 and the diameter of the stirrup, so that the height of the rear longitudinal stirrup 4 is ensured to be consistent with the height of the upper longitudinal stirrup of the traditional prefabricated laminated beam 1; the two ends of the upper part of the stirrup are bent at 180 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the stirrup, and the length of the straight section after bending is determined according to the diameter of the rear longitudinal bar 4; the distance between the outer edge of the stirrup and the concrete surface meets the requirement of the minimum protective layer thickness;
placing down-bending stirrups 3 and the rest longitudinal stirrups in the prefabricated laminated beam 1, and arranging the down-bending stirrups 3 according to the requirement of a frame beam stirrup encryption area, wherein the stirrups are kept upright in the arranging process;
step three, after the prefabricated laminated beam 1 is transported to a construction site for installation and fixation, placing an upper longitudinal rib in a groove of a stirrup downwarping section, wherein the height of an upper surface skin of the longitudinal rib is smaller than that of a lower surface skin of a 180-degree bending part of the stirrup, the surface skins at the lower end of the longitudinal rib are clung to the upper surface skin of the stirrup downwarping section, the surface skins at the outer sides of the longitudinal ribs at two sides are clung to the stirrup, and meanwhile, the net spacing of the longitudinal ribs in the horizontal direction is not smaller than 30mm and 1.5 times of the diameter of the longitudinal ribs;
fourthly, after the longitudinal bars are placed, connecting the upper longitudinal bars with the stirrups by using binding wires in the modes of single filament plum blossom, single filament full binding, double filament plum blossom and the like;
and fifthly, pouring the upper post-pouring concrete 2, and curing the concrete after the pouring is completed.
Claims (4)
1. The utility model provides a connection structure of post-arranged longitudinal reinforcement in precast superimposed beam upper portion and downwarping stirrup, includes downwarping stirrup (3) and precast superimposed beam (1) upper portion post-arranged longitudinal reinforcement (4) of upper portion existence downwarping recess, characterized by: the two ends of the flexible stirrup (3) are bent at 90 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the lower flexible stirrup (3), and the lower flexible depth is larger than or equal to the sum of the diameters of the rear longitudinal ribs (4) and the lower flexible stirrup (3); the two ends of the upper rear longitudinal rib (4) are bent at 180 degrees, the bending diameter is not smaller than 2.5 times of the diameter of the upper rear longitudinal rib (4), and the length of the straight section after bending is determined according to the diameter of the rear longitudinal rib (4); the distance between the outer edge of the upper rear longitudinal rib (4) and the concrete surface meets the requirement of the minimum protective layer thickness.
2. The connection structure of the rear longitudinal ribs and the downwarping stirrups at the upper part of the prefabricated laminated beam as set forth in claim 1, wherein: the down-warping stirrups (3) are arranged in an encrypted mode at the two ends of the prefabricated superposed beam (1);
the upper rear-mounted longitudinal ribs (4) are placed in grooves of the stirrup downwarping sections, the height of the upper surface of each longitudinal rib is smaller than that of the lower surface of the 180-degree bending part of the stirrup, the surfaces at the lower ends of the longitudinal ribs are clung to the surfaces at the upper parts of the stirrup downwarping sections, the surfaces at the outer sides of the longitudinal ribs at two sides are clung to the stirrups, and the net distance between the horizontal directions of the longitudinal ribs is not smaller than 30mm and 1.5 times of the diameter of the longitudinal ribs.
3. The connection structure of the rear longitudinal ribs and the downwarping stirrups at the upper part of the prefabricated laminated beam as set forth in claim 2, wherein: the upper rear longitudinal bar (4) is connected with the down-flexible stirrup (3) through binding wires in any mode of single filament plum blossom, single filament full binding and double filament plum blossom.
4. A structure for connecting rear longitudinal ribs and downwarping stirrups at the upper part of a prefabricated laminated beam as set forth in claim 3, wherein: the down-bending stirrup (3) and the rear longitudinal stirrup (4) realize the arrangement of the steel bars under the condition of multi-row longitudinal stirrups on the upper part of the beam by changing the depth of the grooves and the parallel connection mode, and the depth of the stirrup grooves is regulated by stirrups with different diameters and longitudinal stirrups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162212.5A CN117365015A (en) | 2023-09-11 | 2023-09-11 | Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162212.5A CN117365015A (en) | 2023-09-11 | 2023-09-11 | Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117365015A true CN117365015A (en) | 2024-01-09 |
Family
ID=89390012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311162212.5A Pending CN117365015A (en) | 2023-09-11 | 2023-09-11 | Connecting structure of rear longitudinal ribs and downwarping stirrups on upper part of prefabricated superposed beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117365015A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1499984A (en) * | 1923-01-29 | 1924-07-01 | Stephen L Heidrich | Support |
| GB595378A (en) * | 1945-05-07 | 1947-12-03 | Donovan Henry Lee | Improvements in reinforced concrete beams and columns |
| ES1052142U (en) * | 2002-06-13 | 2002-11-01 | Forjados Marfe S A | Improved armor forged. (Machine-translation by Google Translate, not legally binding) |
| US20070039276A1 (en) * | 2005-08-19 | 2007-02-22 | R2M2 Rebar And Stressing, Inc. | Concrete reinforcer and method |
| EP1760218A2 (en) * | 2005-08-29 | 2007-03-07 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| CN105839846A (en) * | 2016-03-22 | 2016-08-10 | 哈尔滨工业大学 | Prefabricated reinforced concrete composite beam |
| KR20190108740A (en) * | 2018-03-15 | 2019-09-25 | 은성산업 주식회사 | Structure of rebar cage for cast in place pile |
| CN213709859U (en) * | 2020-08-28 | 2021-07-16 | 广东省建科建筑设计院有限公司 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
| CN218541207U (en) * | 2022-11-02 | 2023-02-28 | 山东新厦建设有限公司 | Reinforced concrete beam double-rubber-band steel bar support structure |
-
2023
- 2023-09-11 CN CN202311162212.5A patent/CN117365015A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1499984A (en) * | 1923-01-29 | 1924-07-01 | Stephen L Heidrich | Support |
| GB595378A (en) * | 1945-05-07 | 1947-12-03 | Donovan Henry Lee | Improvements in reinforced concrete beams and columns |
| ES1052142U (en) * | 2002-06-13 | 2002-11-01 | Forjados Marfe S A | Improved armor forged. (Machine-translation by Google Translate, not legally binding) |
| US20070039276A1 (en) * | 2005-08-19 | 2007-02-22 | R2M2 Rebar And Stressing, Inc. | Concrete reinforcer and method |
| EP1760218A2 (en) * | 2005-08-29 | 2007-03-07 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| ES2307357A1 (en) * | 2005-08-29 | 2008-11-16 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| CN105839846A (en) * | 2016-03-22 | 2016-08-10 | 哈尔滨工业大学 | Prefabricated reinforced concrete composite beam |
| KR20190108740A (en) * | 2018-03-15 | 2019-09-25 | 은성산업 주식회사 | Structure of rebar cage for cast in place pile |
| CN213709859U (en) * | 2020-08-28 | 2021-07-16 | 广东省建科建筑设计院有限公司 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
| CN218541207U (en) * | 2022-11-02 | 2023-02-28 | 山东新厦建设有限公司 | Reinforced concrete beam double-rubber-band steel bar support structure |
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