CN106760191A - One kind segmentation applies prestressed large-span concrete beam - Google Patents
One kind segmentation applies prestressed large-span concrete beam Download PDFInfo
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- CN106760191A CN106760191A CN201710035850.9A CN201710035850A CN106760191A CN 106760191 A CN106760191 A CN 106760191A CN 201710035850 A CN201710035850 A CN 201710035850A CN 106760191 A CN106760191 A CN 106760191A
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- steel plate
- concrete
- concrete beam
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- 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
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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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
- 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
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The present invention provides a kind of segmentation and applies prestressed large-span concrete beam, the concrete column of large-span concrete crossbeam and crossbeam both sides including middle part, the concrete beam upper and lower surface is equipped with fixation steel plate and pre-stressed steel plate, pre-stressed steel plate is located at the hogging moment area of concrete beam upper surface, pre-stressed steel plate is located at the sagging moment area of concrete beam lower surface, lay fixation steel plate in other positions of concrete beam upper and lower surface, fixation steel plate forms an entirety with pre-stressed steel plate by welding, making the restraining force of pre-stressed steel plate, to act on concrete beam complete in the range of.Beams of concrete is applied to long-span beams structure in the present invention, and beams of concrete surface mount pre-stressed steel plate not only increases the second moment of area of tranformed section of beam, while the inverted camber that prestressing force causes can also offset part deformation, that is, enhances the rigidity property of girder construction；Additionally, steel plate and binding agent can to a certain extent reduce the carbonization of concrete as the protective layer of concrete upper and lower surface.
Description
Technical field
Technical field of structural engineering in architectural engineering belonging to of the invention, more particularly to a kind of segmentation applies prestressed big
Span beams of concrete.
Background technology
With continuing to develop for Building technology, requirement more and more higher of the building to space, such as meeting room, auditorium etc. are built
Building thing needs inside has larger space, in order to meet the requirement in engineering to intensity and amount of deflection etc., increasing beam can be taken to cut
The method treatment of face and quantity of reinforcement, but the method not only reduces the use space of building, also add engineering cost.At present
Preferable method is, using prestressed concrete local method, prestressing force to be applied in the tensile region of reinforced beam, not only improves component
Tensile strength, moreover it is possible to reduce amount of deflection.Common prestressed concrete construction method is pre-tensioning system and post stretching, the tensioning of this method
End and anchored end construction are complicated, and construction requirement is high, difficulty is big, and can only apply prestressing force to whole section of beam, it is impossible to targetedly
Prestressing force is applied to moment of flexure area, causes to waste；Common external prestressing method is to concrete by stretching wire or steel pole
Beam partially or fully applies prestressing force, and this method is only connected in anchor point with beam, therefore the setting to anchored end and anchor points
Concrete requirement it is higher, slightly deviation will influence prestressing force inside concrete effective transmission, and muscle beam external part
It is easily damaged, or even in forced vibration because ductility deficiency occurs situation about breaking suddenly.In consideration of it, the present invention intends a kind of
New long-span beams structure solves the above problems.
The content of the invention
For the technical scheme that the problem that prior art is present, the present invention are used for solution problems of the prior art
It is as follows：
One kind segmentation applies prestressed large-span concrete beam, including middle part large-span concrete crossbeam 4 and crossbeam both sides
Concrete column, it is characterised in that：The described upper and lower surface of concrete beam 4 is equipped with fixation steel plate 1 and pre-stressed steel plate
2, described pre-stressed steel plate 2 is located at the hogging moment area of the upper surface of concrete beam 4, i.e. beam surface upper both ends, described
Pre-stressed steel plate 2 is located at the sagging moment area of the lower surface of concrete beam 4, the i.e. middle part of crossbeam lower surface, and concrete beam is about 4
Fixation steel plate 1 is laid at other positions of surface, and fixation steel plate 1 forms an entirety, makes prestressing force with pre-stressed steel plate 2 by welding
It is complete in the range of that the restraining force of steel plate 2 acts on concrete beam 4.
Described fixation steel plate 1 and pre-stressed steel plate 2 are connected by crab-bolt 3 with concrete beam 4, and concrete is horizontal
The upper and lower surface of beam 4 offers some anchor holes 6, and some steel corresponding with anchor hole 6 are offered on fixation steel plate 1 and pre-stressed steel plate 2
The aperture of plate perforate 7, anchor hole 6 and steel plate perforate 7 matches with the model of crab-bolt 3, and described crab-bolt 3 passes through steel plate perforate 7 and anchor
The junction steel plate of hole 6 and concrete, the space between crab-bolt 3 and anchor hole 6 are filled up by adhesive glue 5, by steel plate and coagulation local soil type into
One entirety of common stress, has given full play to the advantage that tensile property is good, concrete anti-compression performance is good of steel, makes two kinds of knots
Overall service behaviour after structure combination of materials is substantially better than the simple superposition of both performances.
Described pre-stressed steel plate 2 is that have the steel plate of initial tension in the length direction of beam, and described pre-stressed steel plate 2 sets
It is placed at the hogging moment of the upper surface of concrete beam 4 and at the sagging moment of lower surface, using the elastic deformation characteristic of steel plate, constraint
Concrete deformation is so as to effectively improve the rigidity and crack resistance of component.
Weld seam 8 between described fixation steel plate 1 and pre-stressed steel plate 2 is the splicing of " Z " the font fissure of displacement, is subtracted during to weld
Small high temperature is on the prestressed influence of steel plate, while increased the length of weld seam 8 to ensure the power transmission reliability that is connected firmly.
The described upper and lower surface two side ends of concrete beam 4 are equipped with some bar plantings 9, bar planting 9 with concrete column intersection
Steel plate width direction on crossbeam is arranged symmetrically, and is welded on steel plate, and the afterbody of bar planting 9 enters mixed to concrete column extension and oblique cutting
In solidifying earth pillar.
Described fixation steel plate 1 is identical with the width of pre-stressed steel plate 2, thickness, and the width adds four more than beams of concrete width
Times crab-bolt diameter sum, the thickness is more than 10mm.
Described bar planting 9 is not less than five times of bar planting diameters with the length of steel plate welding portion,
The model and spacing size of described crab-bolt 3 according to specification, and should combine actual conditions calculating；The diameter sum of bar planting 9
Amount should flexibly be selected according to practical engineering calculation.
A kind of segmentation in the present invention applies prestressed large-span concrete beam and is applied to long-span beams structure, the structure
Feature is that prestressing force can offset a part of tension, so as to effectively suppress structural cracks produce；Beams of concrete surface mount is pre-
Stress steel plate not only directly increases the second moment of area of tranformed section of beam, while the inverted camber that prestressing force causes can also offset part
Deformation, that is, enhance the rigidity property of girder construction；Additionally, the protective layer of steel plate and binding agent as concrete upper and lower surface, can
To reduce the carbonization of concrete to a certain extent.
The invention has the advantages that：
1st, the ingenious characteristic for having used steel-concrete combined structure of the present invention, has given full play to the excellent of steel tension and concrete anti-compression
Point, allows steel plate to act as the effect of reinforcing bar, reduces beam section；
2nd, the present invention especially sets prestressing force, Ke Yicheng using pre-stressed steel plate at the moment of flexure of beam at the hogging moment of upper surface
Times bearing capacity and rigidity of the component in serviceability limit stage are improved, and the cracking resistance of component can be improved, make long-span beams
Performance significantly improve；
3rd, the present invention is to apply prestressing force to steel plate, and one end is fixed by bar planting and concrete column and ensures that power transmission is directly reliable,
Constructed compared to traditional deformed bar, effect of the present invention is more significantly, and reduces difficulty of construction.
Brief description of the drawings
Fig. 1 is facade effect schematic diagram of the invention.
Fig. 2 is one section of beam body section decomposing schematic representation in beams of concrete of the present invention.
Fig. 3 be beams of concrete of the present invention anchoring after interlude generalized section.
Fig. 4 is crab-bolt close-up schematic view of the invention.
Fig. 5 is pre-stressed steel plate tensioning direction schematic diagram of the present invention.
Fig. 6 is weld seam close-up schematic view of the present invention.
Fig. 7 is bar planting enlarged diagram at beam-to-column joint of the present invention.
Wherein：1- fixation steel plates, 2- pre-stressed steel plates, 3- crab-bolts, 4- concrete beams, 5- binding agents, 6- anchor holes, 7- steel
Plate perforate, 8- weld seams, 9- bar plantings.
Specific embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail, such as Fig. 1-
Shown in 7, one kind segmentation applies prestressed large-span concrete beam, including middle part large-span concrete crossbeam 4 and crossbeam two
The concrete column of side, the upper and lower surface of concrete beam 4 is equipped with fixation steel plate 1 and pre-stressed steel plate 2, pre-stressed steel plate 2
In the hogging moment area of the upper surface of concrete beam 4, i.e. beam surface upper both ends, pre-stressed steel plate 2 is located under concrete beam 4
The sagging moment area on surface, the i.e. middle part of crossbeam lower surface, other positions of the upper and lower surface of concrete beam 4 laying fixation steel plate 1, Gu
Determine steel plate 1 and form an entirety by welding with pre-stressed steel plate 2, the restraining force of pre-stressed steel plate 2 is acted on concrete horizontal stroke
Beam 4 is complete in the range of.
Fixation steel plate 1 and pre-stressed steel plate 2 are connected by crab-bolt 3 with concrete beam 4, on concrete beam 4
Lower surface offers some anchor holes 6, and some steel plate perforates corresponding with anchor hole 6 are offered on fixation steel plate 1 and pre-stressed steel plate 2
7, the aperture of anchor hole 6 and steel plate perforate 7 matches with the model of crab-bolt 3, and described crab-bolt 3 is connected through steel plate perforate 7 and anchor hole 6
Steel plate and concrete, the space between crab-bolt 3 and anchor hole 6 are filled up by adhesive glue 5, and adhesive glue 5 can select structure glue, by steel plate
With coagulation local soil type an into entirety for common stress, the tensile property that has given full play to steel is good, concrete anti-compression performance is good
Advantage, makes the overall service behaviour after two kinds of structural material combinations be substantially better than the simple superposition of both performances.
Pre-stressed steel plate 2 is that have the steel plate of initial tension in the length direction of beam, and it is horizontal that pre-stressed steel plate 2 is arranged at concrete
At the hogging moment of the upper surface of beam 4 and at the sagging moment of lower surface, using the elastic deformation characteristic of steel plate, confined concrete deformation from
And effectively improve the rigidity and crack resistance of component.
Weld seam 8 between fixation steel plate 1 and pre-stressed steel plate 2 is the splicing of " Z " the font fissure of displacement, and high temperature is reduced during to weld
On the prestressed influence of steel plate, while increased the length of weld seam 8 to ensure the power transmission reliability that is connected firmly, in fixation steel plate 1 and in advance
In the prefabrication process of stress steel plate 2, by the way that junction to be processed into " Z " font fissure of displacement splicing construction being engaged, it is met
It is required that treat weld seam.
The upper and lower surface two side ends of concrete beam 4 are equipped with some bar plantings 9 with concrete column intersection, and bar planting 9 is in crossbeam
On steel plate width direction be arranged symmetrically, be welded on steel plate, the afterbody of bar planting 9 to concrete column extend and oblique cutting enter concrete column
In.
Fixation steel plate 1 is identical with the width of pre-stressed steel plate 2, thickness, and the width adds four times of crab-bolts more than beams of concrete width
Diameter sum, the thickness is more than 10mm.
Bar planting 9 is not less than five times of bar planting diameters with the length of steel plate welding portion, and the inclination water of concrete column is stretched into bar planting
Flat angle≤5 °, bar planting inclination angle is only to highlight heeling condition in Fig. 1, not as angle Selection foundation.
The model and spacing size of crab-bolt 3 according to specification, and should combine actual conditions calculating；The diameter and quantity of bar planting 9
Should flexibly be selected according to practical engineering calculation.
Protection scope of the present invention is not limited to the above embodiments, it is clear that those skilled in the art can be to this hair
It is bright to carry out various changes and deform without deviating from scope and spirit of the present invention.If these are changed and deformation belongs to power of the present invention
In the range of profit requirement and its equivalent technologies, then the intent of the present invention also comprising these changes and deforms.
Claims (7)
1. a kind of large-span concrete crossbeam of the prestressed large-span concrete beam of segmentation applying, including middle part（4）And crossbeam
The concrete column of both sides, it is characterised in that：Described concrete beam（4）Upper and lower surface is equipped with fixation steel plate（1）With it is pre-
Stress steel plate（2）, described pre-stressed steel plate（2）Positioned at concrete beam（4）The hogging moment area of upper surface, described prestressing force
Steel plate（2）Positioned at concrete beam（4）The sagging moment area of lower surface, concrete beam（4）The laying of other positions of upper and lower surface is solid
Determine steel plate（1）, fixation steel plate（1）With pre-stressed steel plate（2）An entirety is formed by welding, makes pre-stressed steel plate（2）Pact
Beam force acts on concrete beam（4）Entirely in the range of.
2. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described consolidates
Determine steel plate（1）And pre-stressed steel plate（2）Pass through crab-bolt（3）With concrete beam（4）It is connected, concrete beam（4）On
Lower surface offers some anchor holes（6）, fixation steel plate（1）And pre-stressed steel plate（2）On offer and anchor hole（6）It is corresponding some
Steel plate perforate（7）, anchor hole（6）With steel plate perforate（7）Aperture and crab-bolt（3）Model matches, described crab-bolt（3）Through steel
Plate perforate（7）And anchor hole（6）Junction steel plate and concrete, crab-bolt（3）With anchor hole（6）Between space pass through adhesive glue（5）Fill out
It is full.
3. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described is pre-
Stress steel plate（2）It is that there is the steel plate of initial tension, described pre-stressed steel plate in the length direction of beam（2）It is arranged at concrete horizontal
Beam（4）At the hogging moment of upper surface and at the sagging moment of lower surface.
4. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described consolidates
Determine steel plate（1）With pre-stressed steel plate（2）Between weld seam（8）For " Z " the font fissure of displacement splices.
5. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described is mixed
Solidifying soil crossbeam（4）Upper and lower surface two side ends are equipped with some bar plantings with concrete column intersection（9）, bar planting（9）On crossbeam
Steel plate width direction is arranged symmetrically, and is welded in upper surface of steel plate, bar planting（9）Afterbody extends to concrete column and oblique cutting enters concrete
In post.
6. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described consolidates
Determine steel plate（1）With pre-stressed steel plate（2）Width, thickness are identical, the width more than beams of concrete width add four times of crab-bolt diameters it
With the thickness is more than 10mm.
7. a kind of segmentation as claimed in claim 1 applies prestressed large-span concrete beam, it is characterised in that：Described plant
Muscle（9）Length with steel plate welding portion is not less than five times of bar planting diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035850.9A CN106760191B (en) | 2017-01-17 | 2017-01-17 | A kind of prestressed large-span concrete beam of segmentation application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035850.9A CN106760191B (en) | 2017-01-17 | 2017-01-17 | A kind of prestressed large-span concrete beam of segmentation application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106760191A true CN106760191A (en) | 2017-05-31 |
| CN106760191B CN106760191B (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710035850.9A Expired - Fee Related CN106760191B (en) | 2017-01-17 | 2017-01-17 | A kind of prestressed large-span concrete beam of segmentation application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305927A (en) * | 2022-09-07 | 2022-11-08 | 中建八局第三建设有限公司 | Construction method for splicing concrete support and IPS support |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561214A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate and concrete composite structure reinforcing method for positive bending moment area |
| CN203807954U (en) * | 2014-02-28 | 2014-09-03 | 西安公路研究院 | Box girder strengthening structure based on steel plate-concrete and unbonded pre-stressing tendons |
-
2017
- 2017-01-17 CN CN201710035850.9A patent/CN106760191B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561214A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate and concrete composite structure reinforcing method for positive bending moment area |
| CN203807954U (en) * | 2014-02-28 | 2014-09-03 | 西安公路研究院 | Box girder strengthening structure based on steel plate-concrete and unbonded pre-stressing tendons |
Non-Patent Citations (2)
| Title |
|---|
| 聂建国等: ""钢板_混凝土组合在钢筋混凝土梁加固中的应用"", 《建筑结构学报》 * |
| 高剑平等: ""锚贴钢板加固钢筋混凝土梁抗弯性能研究"", 《工程抗震与加固改造》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305927A (en) * | 2022-09-07 | 2022-11-08 | 中建八局第三建设有限公司 | Construction method for splicing concrete support and IPS support |
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| CN106760191B (en) | 2019-01-04 |
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Granted publication date: 20190104 Termination date: 20200117 |