CN110629925A - Prestressed special-shaped groove plate - Google Patents
Prestressed special-shaped groove plate Download PDFInfo
- Publication number
- CN110629925A CN110629925A CN201910652686.5A CN201910652686A CN110629925A CN 110629925 A CN110629925 A CN 110629925A CN 201910652686 A CN201910652686 A CN 201910652686A CN 110629925 A CN110629925 A CN 110629925A
- Authority
- CN
- China
- Prior art keywords
- prestressed
- special
- rib
- profiled
- rib beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000004567 concrete Substances 0.000 claims abstract description 25
- 230000002787 reinforcement Effects 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 206010066054 Dysmorphism Diseases 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 238000009415 formwork Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The prestressed special-shaped groove plate is characterized by comprising a panel and a rib beam, wherein the panel and the rib beam are integrally cast into a whole, the bottom of the rib beam is provided with an expanded section flange, and two sides of the panel are provided with notches which are longitudinally arranged. The bottom of the rib beam is provided with the prestressed special-shaped groove plate with the enlarged section flange, so that the bending resistance of the member is greatly increased, the bearing capacity is improved under the condition that the height of the groove plate is certain, the height of the groove plate is reduced under the condition that the live load is the same, and meanwhile, the inverted arch cracking of the member is effectively controlled under the combined action of the special-shaped concrete plate body and the prestressed steel strand.
Description
Technical Field
The invention relates to a building prefabricated component, in particular to a reinforced concrete prefabricated slab prestressed by a pretensioning method for buildings.
Background
The prestressed double-T plate has the characteristics of large span, good bearing capacity and the like, but has the problems of difficult plate seam treatment and cracking caused by reverse arching of the concrete trough plate under the action of negative bending moment in the releasing and tensioning process, and is difficult to popularize in engineering application. The prestressed double-T plate in the prior art can not be manufactured by a long-line method, so that the manufacturing efficiency of components is reduced, the universality of a mould is poor, the manufacturing cost is improved, the bottom of a rib beam is not provided with a special-shaped rib for expanding a section flange, the height of the rib cannot be reduced under the same bending moment, the concrete panel is cracked due to the action of a negative bending moment when the prestressed double-T plate is placed in tension, the structural performance of a prefabricated component is influenced, and meanwhile, the pouring integrity is influenced because the placing gaps are not arranged on the two sides of the panel. The pretensioned prestressing deformed channel plate with expanded bottom section of rib beam has no report.
Disclosure of Invention
The present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a prestressed deformed slot plate with an enlarged flange at the bottom of a rib beam, which is convenient to manufacture.
The prestress special-shaped groove plate comprises a special-shaped concrete plate body and prestress steel strands buried in the special-shaped concrete plate body and used as main reinforcements, the special-shaped concrete plate body comprises a panel and a rib beam, the panel and the rib beam are integrally cast into a whole, the bottom of the rib beam is provided with a flange with an enlarged section, and two sides of the panel are provided with notches arranged along the longitudinal direction.
The prestressed special-shaped groove plate provided by the invention also has the following auxiliary technical characteristics:
the rib beam with the bottom provided with the flange with the enlarged section is L-shaped.
The upper part of the panel is transversely embedded with a steel bar truss at a certain distance, the steel bar truss is partially embedded in the panel concrete, and the upper part of the panel is exposed out of the surface of the panel at a certain height.
The end part of the rib beam of the special-shaped concrete plate body is provided with a placing cantilever head, and a notch is arranged below the cantilever head.
And prestressed steel strand balance bars are arranged at the upper parts of the groove plates.
At least part of the prestressed steel strands serving as the main reinforcements are sleeved with a sleeve with a certain length at the end part.
And a certain inclination is arranged on the inner side of the rib beam and the outer side of the flange of the enlarged section.
The special-shaped concrete plate is embedded with a steel bar net piece, and the steel bar net piece is arranged along the longitudinal direction.
The end part of the special-shaped concrete slab is transversely provided with an upward turning rib, the upper part and the lower part in the upward turning rib are longitudinally embedded with reinforcing steel bars, and two ends of each reinforcing steel bar are bent and extend into the rib beam for a certain length.
Compared with the prior art, the prestress special-shaped groove plate provided by the invention has the following advantages:
1. the area of the pressure-bearing area during tension releasing is enlarged by the enlarged section area at the lower part of the channel plate rib, so that steel strands can be arranged as much as possible, the bending rigidity is increased, and the height of the rib is reduced under the same bending moment. Under the condition of the same rib height, the bearing capacity of the rib is improved, and the method is suitable for buildings with large live load.
2. The traditional double-T plate or the traditional lower convex transverse rib of the trough plate is cancelled, the traditional double-T plate or the traditional trough plate is changed into the traditional upper convex transverse rib, the trough plate can be manufactured by adopting a long-line method, the length of the plate can be randomly set, the work efficiency and the universality of the die are improved, and the cost of amortization of the die is greatly reduced.
3. The groove plates can be separated from the cast-in-place steel bar truss composite floor slab to form a multi-ribbed floor slab, so that the number of ribs and the number of prefabricated parts are reduced, the construction progress of the floor slab is greatly accelerated, and the manufacturing cost is reduced.
4. The groove plate and the cast-in-place surface layer are connected and combined into a laminated slab through a steel bar truss, and the integrity is good.
5. The upper part of the groove plate is provided with the prestress balance rib, so that the reverse arch of the groove plate can be effectively controlled, and the height difference of adjacent plates is reduced.
6. The transverse upward-turning ribs and the steel bar trusses are arranged on the trough plate, so that the bending resistance of the trough plate in the construction stage is effectively improved, and the cracking of the panel is avoided.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a partial perspective view of the tip of the present invention.
Fig. 3 is a cross-sectional view a-a of fig. 2 according to the present invention.
Fig. 4 is a cross-sectional view B-B of fig. 2 according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1 to 4, in an embodiment of the special-shaped trough plate provided by the invention, the special-shaped trough plate comprises a special-shaped concrete plate body 1 and prestressed steel strands 2 buried in the special-shaped concrete plate body as main reinforcements, wherein the special-shaped concrete plate body 1 comprises a rib beam 11 and a panel 12, the rib beam 11 and the panel 12 are integrally cast, the bottom of the rib beam 11 is provided with an enlarged-section flange 111, and two sides of the panel 12 are provided with longitudinal placing notches 121. The bottom of the rib beam is provided with the flange with the enlarged section, so that steel strands can be arranged as much as possible, and the bending rigidity is enhanced, so that the height of the rib is reduced and the steel bar is saved under the same bending moment.
Referring to fig. 4, in the embodiment of the special-shaped trough plate according to the present invention, the rib 11 having the flange 111 with an enlarged cross section at the bottom is L-shaped, the steel bar trusses 3 are embedded in the upper portion of the deck 12 at a certain distance in the transverse direction, the steel bar trusses 3 are partially embedded in the concrete of the deck, and the upper portion is exposed to the surface of the deck 12 at a certain height. And the upper part of the groove plate is provided with prestressed strand balance bars 21. The prestressed balance ribs reduce the inverted arch phenomenon of the prestressed special-shaped trough plate, the rib beams are L-shaped, support points are provided for locally erecting a formwork support frame in the construction stage, formwork support is facilitated, the bending resistance of the plate is improved by arranging the steel bar trusses, and the integrity is improved by combining with post-cast concrete.
Referring to fig. 1 and 2, in the embodiment of the profiled channel plate provided by the invention, the end of the rib beam 11 of the profiled concrete plate body 1 is provided with a placing pick 13, a gap 14 is arranged below the pick, and at least part of the steel strands 2 of the prestressed steel strands 2 serving as main reinforcements is sleeved with a sleeve 22 with a certain length at the end. The notch is arranged below the cantilever head, so that the height of the placing beam or the placing notch of the precast beam is effectively reduced, and the sleeve with a certain length is sleeved at the end part, so that the stress concentration and cracking phenomenon of the end part is avoided.
Referring to fig. 3 and 4, in an embodiment of the irregular channel plate according to the present invention, a slope is provided between the inner side of the rib beam 11 and the outer side of the flange 111 with an enlarged cross section, a steel mesh sheet 4 is embedded in the irregular concrete plate 1, the steel mesh sheet 4 is arranged along the longitudinal direction, an upward-turned rib 15 is transversely provided at the end of the irregular concrete plate 1, steel bars 151 are embedded in the upper and lower portions of the upward-turned rib 15, and both ends of the steel bar 151 are bent to extend into the rib beam 11 for a certain length. The upper turning rib is arranged, so that the panel cracking caused by insufficient bending rigidity of the prestressed trough plate in the construction process is effectively prevented, the shearing strength of the member is improved by the reinforcing mesh, a certain inclination is arranged on the inner side of the rib beam and the outer side of the flange of the enlarged section, and the demolding efficiency is greatly improved.
Claims (9)
1. The utility model provides a prestressing force dysmorphism frid, includes special-shaped concrete plate body and buries underground in the prestressing force stranded wire as the main reinforcement in the special-shaped concrete plate body, characterized by: the special-shaped concrete slab comprises a panel and a rib beam, the panel and the rib beam are integrally cast, the bottom of the rib beam is provided with a flange with an enlarged section, and two sides of the panel are provided with notches which are arranged along the longitudinal direction.
2. The prestressed profiled sheeting defined in claim 1 wherein said rib having an enlarged cross-sectional flange at the bottom thereof is L-shaped.
3. The prestressed profiled sheeting of claim 1 wherein said upper portion of said deck is embedded with steel trusses laterally spaced apart, the steel trusses being partially embedded in the deck concrete, the upper portion being exposed above the deck surface by a predetermined height.
4. The prestressed special-shaped trough plate as claimed in claim 1, wherein the rib beam end of the special-shaped concrete plate body is provided with a placing cantilever, and a notch is arranged below the cantilever.
5. The prestressed profiled groove plate as claimed in claim 1, wherein the upper portion of the groove plate is provided with prestressed strand balance bars.
6. The prestressed profiled channel sheet as claimed in claim 1, wherein the prestressed steel strands as the main reinforcement are at least partially sheathed at the ends with a jacket of a certain length.
7. The prestressed profiled sheeting defined in claim 1 wherein the inner sides of said ribs and the outer sides of said flanges of enlarged cross-section have a draft.
8. The prestressed profiled trough plate as claimed in claim 1, wherein a reinforcing mesh is embedded in the profiled concrete slab, and the reinforcing mesh is arranged along the longitudinal direction.
9. The prestressed profiled groove board as claimed in claim 1, wherein the end of the profiled concrete slab is transversely provided with an upper turning rib, the upper and lower parts of the upper turning rib are longitudinally embedded with reinforcing steel bars, and both ends of the reinforcing steel bars are bent to extend into the rib beam for a certain length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652686.5A CN110629925A (en) | 2019-07-19 | 2019-07-19 | Prestressed special-shaped groove plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652686.5A CN110629925A (en) | 2019-07-19 | 2019-07-19 | Prestressed special-shaped groove plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110629925A true CN110629925A (en) | 2019-12-31 |
Family
ID=68968988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910652686.5A Pending CN110629925A (en) | 2019-07-19 | 2019-07-19 | Prestressed special-shaped groove plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110629925A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001146715A (en) * | 1999-11-19 | 2001-05-29 | Hitachi Zosen Corp | Half precast slab and its joint structure |
| CN102277921A (en) * | 2010-06-08 | 2011-12-14 | 湖南华廷筑邦建材有限公司 | Rib beam forming member for cast-in-situ concrete |
| CN202416650U (en) * | 2011-11-16 | 2012-09-05 | 宝钢建筑系统集成有限公司 | Self-supporting ribbed reinforced steel bar truss concrete composite slab |
| CN106703272A (en) * | 2017-02-03 | 2017-05-24 | 湖南诚友绿色建材科技有限公司 | Unidirectional dense-rib sandwich-type board of prestressed light-aggregate-concrete for making overlapped dense-rib floor slabs |
| CN210342417U (en) * | 2019-07-19 | 2020-04-17 | 宁波优造建筑科技有限公司 | Prestressed special-shaped groove plate |
-
2019
- 2019-07-19 CN CN201910652686.5A patent/CN110629925A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001146715A (en) * | 1999-11-19 | 2001-05-29 | Hitachi Zosen Corp | Half precast slab and its joint structure |
| CN102277921A (en) * | 2010-06-08 | 2011-12-14 | 湖南华廷筑邦建材有限公司 | Rib beam forming member for cast-in-situ concrete |
| CN202416650U (en) * | 2011-11-16 | 2012-09-05 | 宝钢建筑系统集成有限公司 | Self-supporting ribbed reinforced steel bar truss concrete composite slab |
| CN106703272A (en) * | 2017-02-03 | 2017-05-24 | 湖南诚友绿色建材科技有限公司 | Unidirectional dense-rib sandwich-type board of prestressed light-aggregate-concrete for making overlapped dense-rib floor slabs |
| CN210342417U (en) * | 2019-07-19 | 2020-04-17 | 宁波优造建筑科技有限公司 | Prestressed special-shaped groove plate |
Non-Patent Citations (2)
| Title |
|---|
| 张海东等: "《装配式混凝土结构设计》", 28 February 2018, 黄河水利出版社, pages: 146 * |
| 潘睿: "《房屋建筑学》", 30 June 2014, 华中科技大学出版社, pages: 176 * |
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