CN116892263A - Prestressed concrete haunched beam slab floor structure - Google Patents
Prestressed concrete haunched beam slab floor structure Download PDFInfo
- Publication number
- CN116892263A CN116892263A CN202310933285.3A CN202310933285A CN116892263A CN 116892263 A CN116892263 A CN 116892263A CN 202310933285 A CN202310933285 A CN 202310933285A CN 116892263 A CN116892263 A CN 116892263A
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- CN
- China
- Prior art keywords
- haunched
- frame
- floor
- slab
- prestressed
- 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.)
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Links
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 210000002435 tendon Anatomy 0.000 claims description 25
- 230000002787 reinforcement Effects 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- 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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a prestressed concrete haunched beam slab floor structure, which comprises a plurality of frame columns distributed in a rectangular column net, continuous frame beams longitudinally and transversely arranged along the rectangular column net and a floor slab arranged between the frame beams, wherein the end of each frame beam is provided with a vertical haunched, and a floor slab support is provided with a vertical haunched. The floor structure adopts a beam-slab structure system, and has good structural ductility and high reliability; only the frame beam has no secondary beam (except for the position with building function requirement), the structural force transfer path is direct and clear, the construction is convenient, the beam end adopts vertical haunching, the beam end bearing capacity of the continuous beam is fully utilized, the rigidity of the support is improved by increasing the thickness of the floor support, and the reinforcement at the support is reduced; the prestress technology solves the problems of cracks and deflection of beams and plates under the action of large span and large load, and the requirements of the cracks are met without adding reinforcing steel bars, so that the span middle beam is smaller in height and thinner in floor thickness, the building layer height is reduced while the floor clear height is ensured, foundation pit support, earth excavation, anti-floating reinforcement of a bottom plate and the like are also reduced for a basement, the investment is saved, and the comprehensive economic benefit is remarkable.
Description
Technical Field
Technical field of building engineering
Background
The reinforced concrete frame structure is used as a mature structure stress system, is widely applied to multi-story and high-rise houses in various places of the world, is a main and secondary beam structure, a cross beam structure, a unidirectional secondary beam structure and a haunched large plate structure, and is particularly applied to a basement with thicker covering soil or a logistics warehouse with larger load, the cross section and reinforcement of the beam plate designed by the common frame structure system are larger, and the economical efficiency of the building cover structure is poorer.
Disclosure of Invention
The invention aims to solve the technical problems that the prior art has the defects and provides the prestressed concrete haunched beam slab floor structure
The beam plate structure system is adopted, so that the structural ductility is good and the reliability is high; only the frame beam has no secondary beam (except for the position with building function requirement), the structural force transfer path is direct and clear, the construction is convenient, the beam end adopts vertical haunching, the beam end bearing capacity of the continuous beam is fully utilized, the rigidity of the support is improved by increasing the thickness of the floor support, and the reinforcement at the support is reduced; the prestress technology solves the problems of cracks and deflection of beams and plates under the action of large span and large load, and the requirements of the cracks are met without adding reinforcing steel bars, so that the span middle beam is smaller in height and thinner in floor thickness, the building layer height is reduced while the floor clear height is ensured, foundation pit support, earth excavation, anti-floating reinforcement of a bottom plate and the like are also reduced for a basement, the investment is saved, and the comprehensive economic benefit is remarkable.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a prestressed concrete haunched beam slab floor structure, includes a plurality of frame posts that are rectangular column net distribution, along rectangular column net longitudinal and transverse arrangement's continuous frame roof beam and arranges the floor between the frame roof beam, the frame roof beam end has vertical haunched, and floor support department has vertical haunched.
According to the technical scheme, the frame column is a rectangular column, a cylinder or other section columns, and a column cap can be arranged in a node area between the frame column and the frame beam according to requirements.
According to the technical scheme, the vertical haunching heights and lengths of the frame beams and the floor slabs are determined according to the column network span, the floor load and the calculation result.
According to the technical scheme, the vertical haunching of the frame beams and the floor slabs is an inclined haunching or a square haunching (a cross section view), and the vertical haunching can be adjusted according to building functions or on-site construction so as to meet the requirements of beautiful building or convenient construction.
According to the technical scheme, the floor structure is most suitable for the top plate of the basement and the logistics warehouse floor slab, and can also be used for other floor positions;
in order to achieve better technical and economic indexes, a prestressing technology can be adopted on the basis:
according to the technical scheme, the frame beam is a multi-span continuous frame beam, continuous prestressed tendons are arranged in the frame beam, and the continuous prestressed tendons are continuously arranged or locally arranged in the multi-span continuous frame beam.
According to the technical scheme, the floor slab is a multi-span continuous plate, and the continuous prestressed tendons are arranged in the floor slab and are continuously or locally arranged in the multi-span continuous plate.
According to the technical scheme, the beam shape of the prestress rib in the span of the frame beam or the floor slab is curved, linear or broken line type.
According to the technical scheme, the type of the prestressed tendon is a post-tensioned bonded prestressed tendon or a post-tensioned unbonded prestressed tendon or a post-Zhang Huan bonded prestressed tendon, and the type of the prestressed tendon can be configured singly or jointly and adopts a bonded prestressed technology or an unbonded prestressed technology or a slow bonded prestressed technology.
Drawings
FIG. 1 is a standard cross-plane layout of a prestressed concrete haunched beam-slab floor structure
FIG. 2 is a cross-sectional view a-a of FIG. 1 of a prestressed concrete haunched beam-slab floor structure
FIG. 3 is a section view of the prestressed concrete haunched beam-slab floor structure of FIG. 1 in section b-b
FIG. 4 is a standard cross-floor plan view of a floor system of a comparative example of the prior art;
1 is a frame column, 2 is a frame beam, 3 is a frame beam end vertical haunched, 4 is a floor slab, 5 is a floor slab support vertical haunched, 6 is a floor slab internal prestress rib, and 7 is a frame beam internal prestress rib.
Description of the embodiments
The present invention will be described in detail with reference to the accompanying drawings.
Examples
As shown in fig. 1, the prestressed concrete haunched beam slab floor structure in an embodiment provided by the invention comprises a plurality of frame columns 1 distributed in a rectangular column net, continuous frame beams 2 arranged in two directions along the rectangular column net and a floor slab 4 arranged between the frame beams, wherein the vertical haunched 3 is arranged at the beam end of the frame beam 2, the floor slab 4 is formed by dividing a floor by the continuous frame beams 2, and the vertical haunched 5 is arranged at a support of the floor slab 4.
As shown in figure 1, the vertical haunching at the beam end is an oblique haunching, and the vertical haunching at the floor support is a square haunching.
As shown in fig. 1, the material of the floor system is reinforced concrete.
As shown in FIG. 1, the square column net has a size of 8.1mX8.1m, the frame beam 2 has a cross-sectional size of 500mm (width) X600mm (height), the beam end vertical haunch 3 has a size of 1200mm (length) X400mm (height), the floor slab 4 has a thickness of 250mm, and the floor slab support has a vertical haunch 5 size of 600 (length) X100mm (height)
As shown in fig. 2, a bidirectional continuous prestressed tendon 6 is arranged in the floor slab, and a beam shape in the span is a curve type by adopting an unbonded prestressed tendon.
As shown in fig. 3, a continuous prestressed tendon 7 is arranged in the frame beam, and a beam shape in the span is a curve type by adopting a slow-bonding prestressed tendon.
Comparative example
As shown in fig. 4, the comparative example provided by the invention is a floor structure in the prior art, and comprises a plurality of frame columns 1 and continuous frame beams 2 which are distributed in a rectangular column net, wherein the frame beams 2 are vertically and horizontally arranged along the rectangular column net to form a grid structure, a floor slab 3 is arranged between the frame beams 2, and a vertical haunching 4 is arranged at a support of the floor slab 3.
As shown in fig. 4, the vertical haunching of the floor support is an inclined haunching, and the material of the floor is reinforced concrete.
As shown in FIG. 4, the square column net has a size of 8.1mX8.1m, the frame beam 2 has a cross-sectional size of 450mm (width) X800mm (height), the floor slab 3 has a thickness of 250mm, and the vertical haunching 4 at the floor slab support has a size of 1100 (length) X250mm (height)
The amounts of ordinary steel bars, prestressed tendons and concrete used in the construction of the standard span (8.1 mx8.1 m) inner floor in the examples and comparative examples are shown in the following table; for convenience of comparison, HRB400 grade steel bars are uniformly adopted, C35 waterproof concrete is adopted, the earthquake and temperature effects are not considered, the constant load (self weight is automatically considered) is 27kN/m < 2 >, and the live load is 5kN/m < 2 >.
In order to facilitate the comparison of comprehensive economic benefits, the comprehensive construction cost of C35 waterproof concrete is 650 yuan/m < 3 >, the comprehensive construction cost of common steel bars is 5500 yuan/t, and the construction cost is reduced by 35 yuan/m < 2 > per reduction of 100mm excavation of the basement and foundation pit support.
Examples and comparative examples:
the concrete and the common steel bars are reduced by 145 yuan/m < 2 > altogether;
the cost of the plate unbonded tendons (comprising anchorage devices, auxiliary materials, manufacturing and installation) is about 58 yuan/m 2 according to the comprehensive cost of the unbonded prestressed tendons of 12 yuan/kg; liang Huan the cost of binding prestressed tendons (comprising anchorage devices, auxiliary materials, manufacturing and installing) is about 50 yuan/m 2 according to the comprehensive cost of the slow binding prestressed tendons of 18 yuan/kg;
the beam height is reduced, namely the basement excavation and foundation pit support are reduced by 200mm, and the manufacturing cost can be reduced by 70 yuan/m < 2 >;
the total cost is reduced by about 107 yuan/m < 2 >.
The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the claims and their equivalents.
Claims (7)
1. A prestressed concrete haunched beam-slab floor structure. The frame girder construction method is characterized by comprising a plurality of frame girders distributed in a rectangular column net, continuous frame girders arranged along the rectangular column net and floor slabs arranged between the frame girders, wherein each cross frame girder is continuous at girder-girder joint; the frame beam is characterized in that the beam ends of the frame beams are provided with vertical armholes, the armholes between the frame beams are provided with vertical armholes at the frame beam support, and the vertical armholes of the frame beams and the armholes are inclined armholes or square armholes.
2. The prestressed concrete haunched beam slab floor structure as recited in claim 1, characterized in that the frame beams are multi-span continuous frame beams, continuous prestressed tendons are arranged in the frame beams, and the continuous prestressed tendons are arranged continuously or locally in the multi-span continuous frame beams.
3. The prestressed concrete haunched beam-slab floor structure as claimed in claim 1, characterized in that the haunched floor is a multi-span continuous slab, and continuous prestressed tendons are arranged in the haunched floor and are arranged continuously or locally in the multi-span continuous slab.
4. A prestressed concrete haunched beam-slab floor structure as claimed in claim 2 or 3, characterized in that the tendons are in the form of beams in the frame beam or haunched floor span, in a curved, linear or zigzag form.
5. The prestressed concrete haunched beam-slab floor structure as recited in any one of claims 2 to 4, characterized in that the prestressed tendons are post-tensioned bonded tendons or post-tensioned unbonded tendons or post-Zhang Huan bonded tendons, and the bonded prestressed technologies or unbonded prestressed technologies or slow bonded prestressed technologies are adopted.
6. The prestressed concrete haunched beam-slab floor structure as recited in claim 1, characterized in that the vertical haunched heights and lengths of the frame beams and the haunched floor slab are not limited to a certain range of values according to the calculation and the column network span.
7. The prestressed concrete haunched beam-slab floor structure of claim 1, characterized in that the vertical haunched of the frame beams and the haunched floor are diagonal or square haunched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933285.3A CN116892263A (en) | 2023-07-27 | 2023-07-27 | Prestressed concrete haunched beam slab floor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933285.3A CN116892263A (en) | 2023-07-27 | 2023-07-27 | Prestressed concrete haunched beam slab floor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116892263A true CN116892263A (en) | 2023-10-17 |
Family
ID=88310628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310933285.3A Pending CN116892263A (en) | 2023-07-27 | 2023-07-27 | Prestressed concrete haunched beam slab floor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116892263A (en) |
-
2023
- 2023-07-27 CN CN202310933285.3A patent/CN116892263A/en active Pending
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