CN208121542U - A kind of steel-ultra-high performance concrete adapter section - Google Patents
A kind of steel-ultra-high performance concrete adapter section Download PDFInfo
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- CN208121542U CN208121542U CN201820594102.4U CN201820594102U CN208121542U CN 208121542 U CN208121542 U CN 208121542U CN 201820594102 U CN201820594102 U CN 201820594102U CN 208121542 U CN208121542 U CN 208121542U
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Abstract
The utility model discloses a kind of steel-ultra-high performance concrete adapter section, the steel-ultra-high performance concrete adapter section includes bondbeam, and one end of bondbeam is connect with girder steel, and the other end is connect with beams of concrete, and the interconnecting piece of bondbeam and girder steel is provided with bearing plate；The problems such as the utility model can solve existing steel-concrete joint segment construction complexity, stiffness transition irregularity, difficulty of construction is big, structure is simple, securely and reliably.
Description
Technical field
The utility model relates to technical field of civil engineering, and in particular to a kind of steel-ultra-high performance concrete adapter section.
Background technique
In steel and concrete composite structure bridge, in order to safely transmit huge lotus between girder steel and beams of concrete
It carries, needs that a large amount of load transfer device is arranged in steel-ultra-high performance concrete adapter section, leading to adapter section, difficulty of construction is big, knot
Structure reliability, simultaneously because sectional dimension mutation causes rigidity discontinuous, cause partial component stress to concentrate, road-ability
The disadvantages of poor.
Utility model content
The utility model is directed to the above-mentioned deficiency of the prior art, provides a kind of steel-convenient to carry out, stiffness transition is smooth
Ultra-high performance concrete adapter section.
In order to solve the above technical problems, the utility model uses following technical proposal：
The utility model provides a kind of steel-ultra-high performance concrete adapter section comprising bondbeam, one end of bondbeam
It is connect with girder steel, the other end is connect with beams of concrete, and bondbeam includes I-shaped steel plate, web two sides of I-shaped steel plate and upper
The inside package of lower wing plate is provided with ultra-high performance concrete layer, the cross-sectional shape and beams of concrete cross sectional dimensions of bondbeam
Different and structure is identical, and several circular holes are uniformly provided on the web of I-shaped steel plate, flank reinforcing bar is provided through in circular hole,
Flank reinforcing bar and the web of I-shaped steel plate are perpendicular；The inside uniform welding of the upper lower wing plate of I-shaped steel plate has peg；
Steel mesh is laid in bondbeam, the end of steel mesh is connected with the reinforcing bar in beams of concrete；The bondbeam
It is inside provided through presstressed reinforcing steel, one end of presstressed reinforcing steel is fixedly connected with bearing plate, and the other end is answered with pre- in beams of concrete
Power muscle is connected.
In above-mentioned technical proposal, it is preferred that the cross section of bearing plate is in T font, height and the girder steel height phase of bearing plate
Together, the web width of bearing plate and beams of concrete is of same size, and the anchor with presstressed reinforcing steel anchor connection is offered on bearing plate
Connect hole.
In above-mentioned technical proposal, it is preferred that the height and beams of concrete for the side that I-shaped steel plate connects with beams of concrete
Identical, the height for the side that I-shaped steel plate and girder steel connect is identical as girder steel.
In above-mentioned technical proposal, it is preferred that the most narrow spacing of bore edges and web edge on the web of I-shaped steel plate
From the half for being not less than Circularhole diameter, bore edges are not less than 1.5 times of Circularhole diameter at a distance from bore edges.
The main beneficial effect of above-mentioned steel-ultra-high performance concrete adapter section provided by the utility model is：
The utility model is common with engaging portion I-steel by pouring ultra-high performance concrete in steel-concrete engaging portion
Adapter section is constituted, realizes that the rigidity between girder steel and beams of concrete smoothly transits, since ultra-high performance concrete is with high
Toughness and compression strength are just able to satisfy the Structural strength calls of engaging portion using relatively simple structure, thus structure is simple, applies
Work is convenient, and construction efficiency can be greatly improved.Setting peg and flank reinforcing bar in adapter section are carried, I-shaped steel plate and superelevation are enhanced
Connection between performance concrete layer, while peg also acts as the effect of transmitting axial compressive force.
By the way that I-shaped steel plate is arranged in engaging portion, it can be played by I-shaped steel plate and accept girder steel and beams of concrete simultaneously
Support the effect of ultra-high performance concrete layer；Effectively meet Structural Design Requirement, and structure is simple, improve traditional jointing due to
Construction is complicated and leads to stress concentration and structural fatigue, can be widely applied in bridge structure.
By the way that bearing plate is arranged, using bearing plate, the axial force that will act on girder steel general section is spread by bearing plate
Into ultra-high performance concrete, it is eventually transferred on beams of concrete.Axial compressive force is mainly born by peg, and passes through adapter section
Adhesion strength and frictional force share, therefore design when based on the effect of peg, be effectively ensured adapter section to axial compressive force accept
Reliability.
By the way that peg is arranged on the inside of lower flange on adapter section girder steel, the reliability of adapter section load ensure that；By
Increase circular hole and flank reinforcing bar on the web of I-shaped steel plate, more effectively has I-shaped steel plate and ultra-high performance concrete layer
Effect ground combines, and prevents the removing between steel plate and ultra-high performance concrete.
It is connected by the way that presstressed reinforcing steel is arranged in ultra-high performance concrete layer, and with bearing plate, makes girder steel and concrete
Beam is combined closely, and tensile stress caused by vertical bending moment is offset.By the way that steel mesh is arranged in ultra-high performance concrete layer, and and it is mixed
Reinforcing bar in solidifying soil beam is connected, and enhances the connectivity between beams of concrete and ultra-high performance concrete layer, makes the two effectively
Ground is connected as an entirety.
It is real by the way that the bondbeam that ultra-high performance concrete and girder steel collectively form is arranged in girder steel and beams of concrete adapter section
Rigidity between existing girder steel and beams of concrete smoothly transits, and guarantees the structural strength of adapter section, enhances durability, while structure letter
It is single, it is easy for construction, construction efficiency can be greatly improved.
Detailed description of the invention
Fig. 1 is steel-ultra-high performance concrete adapter section side view.
Fig. 2 is half sectional view of the adapter section adjacent to beams of concrete side.
Fig. 3 is structural schematic diagram of the adapter section adjacent to girder steel side.
Wherein, 1, girder steel, 2, bondbeam, 21, flank reinforcing bar, 22, peg, 23, steel mesh, 24, presstressed reinforcing steel, 25, work
Font steel plate, 26, ultra-high performance concrete layer, 3, beams of concrete, 4, bearing plate, 41, anchor hole.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing：
As shown in Figure 1, it is steel-ultra-high performance concrete adapter section side view.
It is as shown in Figure 1 that the utility model provides a kind of steel-ultra-high performance concrete adapter section comprising bondbeam 2, knot
The one end for closing beam 2 is connect with girder steel 1, and the other end is connect with beams of concrete 3, and the interconnecting piece of bondbeam 2 and girder steel 1 is provided with pressure-bearing
Plate 4；Bondbeam 2 includes I-shaped steel plate 25, and the web two sides of I-shaped steel plate 25 and the inside package of upper lower wing plate are provided with
The cross-sectional shape of ultra-high performance concrete layer 26, bondbeam 2 is different from 3 cross sectional dimensions of beams of concrete and structure is identical, work
Font steel plate 25 is identical as beams of concrete 3 as the height for the side that beams of concrete 3 connects, and I-shaped steel plate 25 connects with girder steel 1
Side height it is identical as girder steel 1.By this structure, it can guarantee that I-shaped steel plate 25 is effectively conducted from 1 He of girder steel
The axial stress of beams of concrete 3 prevents the tangential stress for be easy to causeing 3 deformation of girder steel 1 and beams of concrete.
Several circular holes are uniformly provided on I-shaped 25 web of steel plate, Circularhole diameter is fixed value；I-shaped 25 abdomen of steel plate
The minimum range of bore edges and web edge on plate is not less than the half of Circularhole diameter, bore edges and bore edges away from
From the Circularhole diameter for being not less than 1.5 times.
As shown in Fig. 2, being provided through flank reinforcing bar 21 in circular hole, flank reinforcing bar 21 and the web of bondbeam 2 are perpendicular；
The inside uniform welding of the upper lower wing plate of bondbeam 2 has peg 22；By setting flank reinforcing bar 21 and peg 22, pass through peg 22
The axial stress of girder steel 1 and beams of concrete 3 is accepted and transmitted with flank reinforcing bar 21, and in 26 high tensile of ultra-high performance concrete layer
Under intensity effect, the stress between girder steel 1 and beams of concrete 3 is effectively absorbed, to enhance I-shaped steel plate 25 and superelevation
Connection between energy concrete layer 26, while peg 22 also acts as the effect of transmitting axial compressive force.
Steel mesh 23 is laid in bondbeam 2, the end of steel mesh 23 is connected with the reinforcing bar in beams of concrete 3；In conjunction with
The upper lower wing plate of beam 2 is provided through presstressed reinforcing steel 24 at web position, and one end of presstressed reinforcing steel 24 and bearing plate 4 are fixed
Connection, the other end are connected with the presstressed reinforcing steel 24 in beams of concrete 3.
As shown in figure 3, the cross section of bearing plate 4 is in T font, the height of bearing plate 4 is identical as 1 height of girder steel, bearing plate 4
Web width and beams of concrete 3 it is of same size, the anchor hole with 24 anchor connection of presstressed reinforcing steel is offered on bearing plate 4
41。
By the way that bearing plate 4 is arranged, by the stress transmitted on ultra-high performance concrete layer 26 and I-shaped steel plate 25 by holding
Pressing plate 4, which is concentrated, simultaneously to be redistributed, and is conducive to protect girder steel 1, is avoided by complex stress and deformation occurs.
Here is above-mentioned steel-ultra-high performance concrete adapter section production method comprising following steps：
S1, girder steel 1, the sectional dimension of beams of concrete 3 and length, the bearing plate 4 of bondbeam 2 are selected according to design requirement
Sectional dimension.
Wherein, the size of girder steel 1 and beams of concrete 3 is all to select existing size according to demand, and the ruler of bearing plate 4
Very little, using T font similar with beams of concrete 3, the height of bearing plate 4 is identical as 1 height of girder steel, the web width of bearing plate 4
It is of same size with beams of concrete 3.
Corresponding bearing plate 4 is selected according to demand, using bearing plate 4, by ultra-high performance concrete layer 26 and I-shaped steel plate
The stress transmitted on 25 is concentrated and is redistributed by bearing plate 4, is conducive to protect girder steel 1, is avoided being occurred by complex stress
Deformation.
Further, the calculation method of the length of bondbeam 2, includes the following steps：
S1, axial force is taken to be F, 22 numbers of peg of every row are n, and peg bearing capacity Fs, the spacing of every row's peg 22 is d,
The 22 number of rows N of peg then needed is：N=F/ (2n*Fs).
S2,2 end peg of bondbeam is taken to be respectively d1, d2 with a distance from 1 end section of 3 end section of beams of concrete and girder steel,
Then the length of bondbeam 2 is：L=(N-1) d+d1+d2.
By the number of rows of peg 22, the length of bondbeam 2 can be calculated；Axial compressive force mainly passes through peg 22 and holds
By, and shared by the adhesion strength and frictional force of bondbeam 2, therefore knot is effectively ensured based on the effect of peg 22 when design
Close the reliability that section accepts axial compressive force.
S2, the I-shaped steel plate 25 for making bearing plate 4 and bondbeam 2, and bearing plate 4 is welded in bondbeam 2 and girder steel 1
Interface on.
S3, circular hole is opened up on the web of I-shaped steel plate 25, and weld on the inside of the upper lower wing plate of I-shaped steel plate 25
Peg 22.
S4, the prestressed muscle 24 in I-shaped steel plate 25, presstressed reinforcing steel 24 and the anchor hole 41 on bearing plate 4 are passed through
Wear connection.
By the way that presstressed reinforcing steel 24 is arranged in ultra-high performance concrete layer 26, and it is connected with bearing plate 4, makes 1 He of girder steel
Beams of concrete 3 is combined closely, and tensile stress caused by vertical bending moment is offset.
S5, steel mesh 23, specification and the specification phase in beams of concrete 3 of steel mesh 23 are laid in I-shaped steel plate 25
Together, and by the end of steel mesh 23 it is connected respectively with the reinforcing bar in bearing plate 4 and beams of concrete 3.
By the way that steel mesh 23 is arranged in ultra-high performance concrete layer 26, and it is connected with the reinforcing bar in beams of concrete 3, increases
Strong connectivity between beams of concrete 3 and ultra-high performance concrete layer 26 both makes effectively to be connected as an entirety.
S6, run through installation flank reinforcing bar 21 in circular hole, and flank reinforcing bar 21 is connected with steel mesh 23.
By increasing circular hole and flank reinforcing bar 21 on the web of I-shaped steel plate 25, more effectively by I-shaped steel plate 25
The power being subject to passes to ultra-high performance concrete layer 26.
S7, with bearing plate 4 and beams of concrete 3 it is end, pours ultra-high performance concrete layer 26 in I-shaped steel plate 25,
Ultra-high performance concrete layer 26 is set to wrap up flank reinforcing bar 21 and peg 22.
S8, tensioning and anchoring prestress muscle 24.
Presstressed reinforcing steel 24 is anchored on the anchor hole 41 of bearing plate 4；By being arranged in ultra-high performance concrete layer 26
Presstressed reinforcing steel 24, and welded with 4 phase of bearing plate, girder steel 1 during the installation process is accepted using presstressed reinforcing steel 24 and beams of concrete 3 produces
Raw prestressing force guarantees installation effect.
By pouring ultra-high performance concrete layer 26 in bondbeam 2, peg 22 and flank reinforcing bar only are set in bondbeam 2
21 are just able to satisfy Structural Design Requirement, and structure is simple, easy for construction, construction efficiency is high, while improving traditional jointing due to structure
It makes complicated and leads to stress concentration and structural fatigue, can be widely applied in bridge structure.
Specific embodiment of the present utility model is described above, in order to facilitate understanding by those skilled in the art
The utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the utility model spirit and scope in,
These variations are it will be apparent that all utilize the innovation and creation of the utility model design in the column of protection.
Claims (4)
1. a kind of steel-ultra-high performance concrete adapter section, which is characterized in that including bondbeam (2), the one of the bondbeam (2)
End is connect with girder steel (1), and the other end is connect with beams of concrete (3), and the interconnecting piece of bondbeam (2) and girder steel (1) is provided with pressure-bearing
Plate (4)；Bondbeam (2) includes I-shaped steel plate (25), the web two sides of I-shaped steel plate (25) and the inside packet of upper lower wing plate
It wraps up in and is provided with ultra-high performance concrete layer (26), the cross-sectional shape of bondbeam (2) is different from beams of concrete (3) cross sectional dimensions
And structure is identical, is uniformly provided with several circular holes on the web of I-shaped steel plate (25), flank reinforcing bar is provided through in circular hole
(21), flank reinforcing bar (21) and the steel web of bondbeam (2) are perpendicular；The inside of the upper lower wing plate of I-shaped steel plate (25) is uniform
It is welded with peg (22)；
It is laid with steel mesh (23) in bondbeam (2), the end of the steel mesh (23) is connected with the reinforcing bar in beams of concrete (3)
It connects；It is provided through presstressed reinforcing steel (24) in the bondbeam (2), one end and bearing plate (4) of presstressed reinforcing steel (24) are fixed to be connected
It connects, the other end is connected with the presstressed reinforcing steel (24) in beams of concrete (3).
2. steel according to claim 1-ultra-high performance concrete adapter section, which is characterized in that the cross of the bearing plate (4)
Section is in T font, and the height of bearing plate (4) is identical as girder steel (1) height, the web width of bearing plate (4) and beams of concrete (3)
It is of same size, offered on bearing plate (4) with the anchor hole (41) of presstressed reinforcing steel (24) anchor connection.
3. steel according to claim 2-ultra-high performance concrete adapter section, which is characterized in that the I-shaped steel plate
(25) height of the side to connect with beams of concrete (3) is identical as beams of concrete (3), I-shaped steel plate (25) and girder steel (1) phase
The height of the side connect is identical as girder steel (1).
4. steel according to claim 3-ultra-high performance concrete adapter section, which is characterized in that the I-shaped steel plate
(25) minimum range of the bore edges on web and web edge is not less than the half of Circularhole diameter, bore edges and circular hole
The distance at edge is not less than 1.5 times of Circularhole diameter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374318A (en) * | 2018-04-24 | 2018-08-07 | 西南交通大学 | A kind of steel-ultra-high performance concrete adapter section and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374318A (en) * | 2018-04-24 | 2018-08-07 | 西南交通大学 | A kind of steel-ultra-high performance concrete adapter section and preparation method thereof |
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