CN205712734U - A kind of bionical combination beam/plate structure - Google Patents
A kind of bionical combination beam/plate structure Download PDFInfo
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- CN205712734U CN205712734U CN201620591661.0U CN201620591661U CN205712734U CN 205712734 U CN205712734 U CN 205712734U CN 201620591661 U CN201620591661 U CN 201620591661U CN 205712734 U CN205712734 U CN 205712734U
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- bionical
- concrete
- combination beam
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Abstract
The utility model discloses a kind of combination beam/plate structure, wherein combination beam/plate structure includes bionical honeycomb layer and reinforced concrete floor, described reinforced concrete structure layer is positioned at above described bionical honeycomb layer, described bionical honeycomb layer includes the honeycomb polygon grid of top panel, lower panel and centre, adjacent two grids have a common edge, in all grid intersections, it is provided with centered by the line that crosses and polygon grid is fixed on connection post integrally.Compared with prior art, this utility model as the lower floor of combinative structure, can effectively reduce deck-molding with biomimetic features layer, reduces the crack in tension phenomenon of concrete, the reinforcing bar of protection inside concrete, improves ductility and the anti-bending strength of component.
Description
Technical field
This utility model relates to a kind of combinative structure, especially relates to combined beam structure and combined board structure.
Background technology
The current armored concrete of one-piece casting form, the armored concrete of assembling form and steel reinforced concrete combination knot
Configuration Shi Shi China builds at present, version widely used in bridge.But for reinforced concrete member, especially for
Flexural member, owing to the tensile strength of concrete material own is far below its comprcssive strength and the comprcssive strength of reinforcing bar.Therefore exist
In flexural member, first tension concrete can produce crack, further affect the bending rigidity of whole component and lose right
The protective effect of internal reinforcing bar.Section steel beam is added to the combinative structure of concrete slab, owing to shaped steel lacks the protection of concrete, very
The problem that the aspects such as burn into fire-resistance easily occur.Along with the development various employing material of science and technology is for civil engineering structure
In, by combination, make full use of two kinds and principle that two or more material pluses and minuses mutually make up is combined so that various materials
The advantage of material is played, and the shortcoming making up other materials forms novel combinative structure form.Such as: utilize FRP material high
By force, the feature such as corrosion resistance, lightweight improves the overall performance of combination beam.FRP material is placed on the tension side of bent member, can
It is prevented effectively from concrete in tension cracking, it is ensured that integrally-built performance, the reinforcing bar of protection inside concrete.
This utility model provides a kind of new FRP-reinforced concrete composite structure form, ties compared to armored concrete
Structure, has good ductility and anti-bending strength.And can effectively reduce the crack in tension phenomenon of concrete, play overall structure
Protective effect.
Summary of the invention
Technical problem to be solved in the utility model is for the above-mentioned reinforced concrete structure beam caused easy to crack
(plate) Stiffness and the etching problem of internal reinforcing bar.By the honeycomb texture of some biologies exists pillar-its outer layer it is
Fiber, sandwich layer is the inspiration of protein, extracts bionical honeycomb texture model, and is verified with this by ABAQUS finite element analysis
Combinative structure beam (plate) based on biomimetic features has more preferable mechanical property.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
A kind of combination beam/plate structure, it is characterised in that: include bionical honeycomb layer and reinforced concrete floor, described
Reinforced concrete structure layer is positioned at above described bionical honeycomb layer, described bionical honeycomb layer include top panel, under
The honeycomb polygon grid of panel and centre, adjacent two grids have a common edge, in all grid intersections, are respectively provided with
Have centered by the line that crosses and polygon grid is fixed on connection post integrally.
Described connection post is hollow.
The cross section of described connection post is polygon or circle.
Described honeycomb polygonal gird is honeycomb hexagonal grid, honeycomb tetragon grid and honeycomb triangular lattice.
The material of described bionical honeycomb layer is FRP or steel.
Shear connector, sand grains or wet connection is used between reinforced concrete structure layer and bionical honeycomb layer.A kind of
The construction method of combination beam/plate structure, it is characterised in that step is:
The first step: prefabricated bionical honeycomb layer also transports job site, fixing after being lifted into relevant position；
Second step: at the bionical honeycomb layer surface configuration tack coat fixed；
3rd step: configure and install reinforcement cage skeleton；
4th step: using bionical honeycomb layer as bottom template, casting concrete maintenance.
This utility model new composite structure beam (plate) is a kind of combinative structure with biomimetic features layer.Including bionical honeybee
Nest structure sheaf, reinforced concrete floor and be used for making the two cooperative tack coat.From the foregoing, make with biomimetic features layer
For the lower floor of combinative structure, deck-molding be can effectively reduce, the crack in tension phenomenon of concrete, the steel of protection inside concrete reduced
Muscle, improves ductility and the anti-bending strength of component, is a kind of lightweight, that intensity is high biomimetic features protective layer.Along with high-rise, super
High building structure and the use of Loads of Long-span Bridges, this utility model has the widest application prospect.
This utility model, based on biomimetic features layer, forms combinative structure with reinforced concrete structure, plays following three
Individual invigoration effect: 1, this new composite structure has and has good ductility and energy dissipation capacity under Moment；2, this is novel
Combinative structure can effectively reduce the crack in tension phenomenon of concrete；3, Novel bionic combinative structure has higher carrying energy
Power, when the upper load of beam (plate) is constant, it is possible to decrease beam (plate) highly, expands building and uses space, reduce structural weight per square meter.Applicant
Above-mentioned Novel bionic combinative structure being carried out Three-D limited element resolution obtain, under conditions of depth of beam is constant, Novel bionic combines
The elastic deformability of girder construction is armored concrete girder construction 2 times.
Accompanying drawing explanation
Fig. 1 is this utility model overall structure schematic diagram；
Fig. 2 is this utility model bionical honeycomb layer side view；
Fig. 3 is bionical honeycomb layer front view in this utility model；
Fig. 4 is bionical honeycomb texture sandwich layer schematic diagram in this utility model；
Fig. 5 is bionical honeycomb texture sandwich layer thin portion structural representation in this utility model；
Fig. 6 is that finite element analysis loads schematic diagram；
Fig. 7 is the load-deflection curves of Novel bionic combined beam structure and armored concrete girder construction；
Figure is numbered: 1 is reinforced concrete structure layer；2 is bionical honeycomb layer；3 is tack coat；4 prop up for simply supported beam
Seat；5 is biomimetic features layer top panel；7 is biomimetic features layer lower panel；6 is bionical honeycomb layer sandwich layer.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is elaborated:
Being fiber by there is pillar-its outer layer in the honeycomb texture of some biologies, sandwich layer is the inspiration of protein, refines
Go out bionical honeycomb texture model, and by ABAQUS finite element analysis checking combinative structure beam based on this biomimetic features
(plate) has more preferable mechanical property.
As it is shown in figure 1, this utility model combination beam/plate structure, including bionical honeycomb layer 2, reinforced concrete structure
Layer 1 and be used for making the two cooperative tack coat 3.Reinforced concrete structure layer 1 is upper strata, and bionical honeycomb layer 2 is
Lower floor.The reinforced concrete structure layer 1 on upper strata can use the concrete material of any strength grade, preferably use C40 grade and
Above concrete, is particularly suitable for using high-strength concrete.
The bionical honeycomb layer 2 of lower floor both can use FRP material, it is possible to use steel or other materials.
The bionical honeycomb layer 1 of lower floor is as it is shown on figure 3, include the bionical honeycomb of top panel 5, lower panel 7 and centre
Structure sheaf sandwich layer 6, bionical honeycomb layer sandwich layer 6 uses grid cell to be connected in sequence, the shape of grid cell such as six
Limit shape, tetragon and triangle.Adjacent two grill unit have a common edge, in all grid intersections, be provided with
Crossing centered by line and polygon grid is fixed on the connection post of one, it can be solid for connecting post, it is also possible to for hollow.Even
Connect post can be cross section be circular cylinder, it is also possible to be cross section be polygonal cylinder.And the length of side of grid and inscribed circle
Diameter all can change according to the demand of Practical Project.
The modes such as shear connector, sand grains, wet connection are used between reinforced concrete structure layer and bionical honeycomb layer
It is attached, it is ensured that the common effect of the two.
Described new composite structure both can use as simply supported beam, plate structure, can make as continuous beam, plate structure again
With.
This utility model Novel bionic combination beam (plate) construction method is as follows:
The first step: the bottom biomimetic features in Fig. 1 is prefabricated in the factory and transports job site, after being lifted into relevant position
Fixing；Second step: tack coat is set；3rd step: configure and install reinforcement cage skeleton；4th step: using this biomimetic features layer as
Bottom template, casting concrete.Owing to job site need not strutbeam (plate) bottom mould, and the biomimetic features layer assembled is permissible
As force structure, during for the mould of strutbeam (plate) surrounding, provide convenient.
Novel bionic combinative structure beam (plate) model schematic and detail structure such as Fig. 1, shown in 2,3,4,5.This specification
In drawn the load-amount of deflection of bionical combined beam structure and armored concrete girder construction by finite element software ABAQUS sunykatuib analysis
Curve illustrates the superiority of the former mechanical property.The details of this specification central sill are shown in Table 1.Wherein L is beam span, and b is
Deck-siding, H is beam total height, h1 position biomimetic features layer height, and h2 is armored concrete height, in Novel bionic combined beam structure
Bottom is basalt fiber composite material (BFRP), and concrete strength is C30, and reinforcing bar type is HPB235.
Table 1 beam details (unit mm)
Owing to existing reinforced beam (plate) structure exists easy to crack, from great, the shortcomings such as ductility is poor, use new
Type bionical combination beam (plate) structure then can be prevented effectively from the problems referred to above.Use the finite element analysis that nonlinear functions is the most powerful
Program-ABAQUS carries out the Analysis of Bearing Capacity of three-point bending to the two.By to two kinds of girder constructions span centre position apply vertical position
Move load, respectively obtain bionical combined beam structure and the case of bending of armored concrete girder construction and load-deflection curves.Logical
Cross comparative analysis load-deflection curves and illustrate that two kinds of structures, in the difference of the aspects such as bearing capacity, ductility, failure mode, are said with this
The superiority of bright Novel bionic combination beam (plate) structure.
Resolve (see Fig. 6 stress model) by ABAQUS, two kinds of girder construction span centres are applied vertical displacement load.About beam
Two ends use freely-supported bearing.Resolve amount of deflection-displacement curve as shown in Figure 7.
Can be obtained by Fig. 7, the load-deflection curves of two kinds of girder constructions can be divided into three phases: elastic deformation stage (bionical group
Conjunction beam: oa section；Reinforced beam: oa ' section), elastic-plastic deformation stage (bionical combination beam: ba section；Reinforced beam: a '
B ' section) and failure stage (bionical combination beam: bc section；Reinforced beam: b ' c ' section).δ in figureE, δE' it is respectively bionical group
Close the mid-span deflection of girder construction and the deformation of armored concrete girder construction maximum flexibility；δU, δUWhen ' respectively two kinds girder constructions are destroyed
Maximum mid-span deflection；NE, NE' it is respectively the span centre load that two kinds of girder construction maximum flexibilities deform；NU, NU' it is respectively two
Plant the maximum midspan load during destruction of girder construction.First compare mid-span deflection to understand: 1. δE=3.15mm, δE'=1.51mm, i.e.
δEIt is δE' 2.09 times.Illustrate that the elastic deformability of Novel bionic combined beam structure is 2.09 times of reinforced beam.This
Time bionical combined beam structure be in elastic deformation stage, there is not crack in the reinforced concrete for tension strain side on its upper strata, thus has
Effect protects the reinforcing bar of inside concrete；2.δU≈δU', mid-span deflection when i.e. two kinds girder constructions are destroyed is almost identical, illustrates two
The limiting damage state of person is all that concrete is crushed.Owing to the fragility of high-strength concrete makes at traditional reinforced beam
In structure, tension side concrete cracking problem is to affect wherein one of factor that high-strength concrete uses.Therefore in bionical combination
Structure uses high-strength concrete can be prevented effectively from the problem of Cracking of tension concrete, fully use the compression of high-strength concrete
Can, significantly improve the bearing capacity of beam.Compare span centre load and then to understand: 1.NE=150KN, NE'=78KN, i.e. NE
It is NE' 1.92 times, close with the multiple of mid-span deflection during Flexible change；2.NU′≈NE, i.e. when pressurized concrete is when bionical group
Close girder construction reach maximum flexibility deform midspan load is equal with the failing load of reinforced beam.Bionical combination beam is described
The elastic deformability of structure depends on the comprcssive strength of layer concrete, and normal reinforced concrete beam breaks when concrete compression
Declare time broken to destroy.It is hereby understood that bionical combined beam structure can give full play to the resistance to compression of concrete or high-strength concrete
Performance；3.NU=1.18NU', the ultimate bearing force rate reinforced beam of the most bionical combined beam structure improves 18%.When using height
During reinforced concrete, bearing capacity then can improve further；4. when two kinds of girder constructions respectively reach span centre destruction amount of deflection, bionical group
Closing girder construction and still can continue bearing load (Fig. 7 bc section), reinforced beam then can not continue bearing load (Fig. 7 b '
=c ' section).In sum, such Novel bionic combination beam (plate) structure has and delays the cracking initiation time, gives full play to coagulation
Soil or even the material property of high-strength concrete, raising multiple mechanical property such as structure ductility, bearing capacity.
Claims (6)
1. combination beam/plate structure, it is characterised in that: include bionical honeycomb layer and reinforced concrete structure layer, institute
State reinforced concrete structure layer and be positioned at above described bionical honeycomb layer, described bionical honeycomb layer include top panel,
The honeycomb polygon grid of lower panel and centre, adjacent two grids have a common edge, in all grid intersections, are all provided with
It is equipped with centered by the line that crosses and polygon grid is fixed on connection post integrally.
Combination beam/plate structure the most according to claim 1, it is characterised in that: described connection post is hollow.
Combination beam/plate structure the most according to claim 2, it is characterised in that: the cross section of described connection post be polygon or
Circular.
4. according to the combination beam/plate structure described in claim 1,2 or 3, it is characterised in that: described honeycomb polygonal gird is honeybee
Nest hexagonal grid, honeycomb tetragon grid and honeycomb triangular lattice.
Combination beam/plate structure the most according to claim 1, it is characterised in that: the material of described bionical honeycomb layer is
FRP or steel.
Combination beam/plate structure the most according to claim 1, it is characterised in that: reinforced concrete structure layer and bionical honeycomb
Shear connector, sand grains or wet connection is used between structure sheaf.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620591661.0U CN205712734U (en) | 2016-06-15 | 2016-06-15 | A kind of bionical combination beam/plate structure |
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| CN201620591661.0U CN205712734U (en) | 2016-06-15 | 2016-06-15 | A kind of bionical combination beam/plate structure |
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| CN205712734U true CN205712734U (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908898A (en) * | 2016-06-15 | 2016-08-31 | 东南大学 | Bionic composite beam/plate structure and construction method |
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2016
- 2016-06-15 CN CN201620591661.0U patent/CN205712734U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908898A (en) * | 2016-06-15 | 2016-08-31 | 东南大学 | Bionic composite beam/plate structure and construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20200615 |