CN102966181B - Rigidity-heterosexual type combined shear connector - Google Patents
Rigidity-heterosexual type combined shear connector Download PDFInfo
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- CN102966181B CN102966181B CN201210514720.0A CN201210514720A CN102966181B CN 102966181 B CN102966181 B CN 102966181B CN 201210514720 A CN201210514720 A CN 201210514720A CN 102966181 B CN102966181 B CN 102966181B
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Abstract
The invention discloses a combined shear connector, which comprises welding studs, wherein at least one gap is formed at the root of each welding stud in a stud rod direction; and an elastic piece is filled in each gap. The invention further provides a combined structure formed by the combined shear connector, a steel member and a concrete member, wherein the combined shear connector is in welded connection with the steel member; the concrete member is poured on the steel member; and the gap width direction of the gap is consistent with a smaller shear rigidity direction of a combined surface of the steel member and the concrete member, and orthogonal with a larger shear rigidity direction of the combined surface of the steel member and the concrete member. The combined structure has the advantages that while reliable shear rigidity of the combined surface of the steel member and the concrete member is guaranteed, shear rigidity of the combined surface is reduced; concrete tensile stress caused by concrete shrinkage and temperature changes in the combined structure of the steel member and the concrete member is effectively reduced; and initial shear rigidity of a combined surface of a prestressed concrete bridge deck slab and a steel beam is reduced and a prestress application effect is effectively increased.
Description
Technical field
The invention belongs to Steel concrete combining structure field, especially a kind of shear connector of Steel concrete bonding surface.
Background technology
Combining structure is the third form of structure that is only second to steel work, concrete structure.Wherein, Steel concrete combining structure is by the strong strong concrete of steel, compressive property of tensile property, reasonably be used in respectively drawing zone and the compressional zone thereof of member, there is good mechanical property and higher economy, in bridge engineering and Structural Engineering, be widely applied.
In Steel concrete combining structure, the shear connector of Steel concrete bonding surface has played the effect that this bi-material is combined, and the stress performance of combining structure is had to larger impact.Weldering nail connector is connector form the most frequently used in combining structure.Refer to Fig. 1 a, Fig. 1 b, the weldering nail schematic diagram that it is prior art, the nail bar of weldering nail 4 consists of solid.In practical application, first weldering nail 4 connectors are welded on steel member, then concreting member, finally forms combining structure.
The shear behavior of weldering nail connector all directions is identical.Under the effects such as permanent mobile load, concrete shrinkage and temperature, when the weldering nail of very limited several specifications of stipulating on code requirement carries out layout design, usually there is bonding surface shear stiffness, shear-carrying capacity, concrete is stressed, and stressed mutual restriction and inharmonious is followed closely in weldering: adopt small size weldering nail, weldering nail is arranged overstocked, and bonding surface all directions shear stiffness is large, may cause tensile stress larger in concrete; Adopt large scale weldering nail, weldering nail was arranged rare, bonding surface shear strength a little less than, weldering nail is stressed larger, may cause weldering to be followed closely directly cutting off or fatigue failure occurs.Therefore,, in, the reliable situation of shear-carrying capacity deposit controlled in bonding surface shear stiffness, optimizing shear connector arrangement, improving structure tension performance is a very important problem.
Summary of the invention
Adverse effect during for above-mentioned technological deficiency and application, the object of this invention is to provide a kind of shear-carrying capacity deposit reliable, and difference is cut the controlled shear connector of direction shear stiffness in early stage.
Technical scheme of the present invention is as follows:
A combined shear connector, comprises weldering nail, and described weldering nail is provided with at least one gap at its root along nail bar direction, in described gap, is filled with elastic component.
Described weldering nail is provided with a gap, and described gap is in the diametrical position in described nail bar cross section.
Described weldering nail is provided with a gap, and described gap position departs from described nail bar diameter of section.
The ratio of the horizontal projection length L of the camber line height H in described gap and camber line is less than or equal to 1/10.
Described weldering nails on and is provided with two gaps, and described two gap symmetries are positioned at described nail bar diameter of section both sides.
Described weldering nail is provided with the gap of two quadratures.
Described gap width is more than or equal to 0.5mm, is less than or equal to 1.0mm, and described chinky altitude is less than or equal to 3/4 of described weldering staple height.
Further, described elastomeric material is any in sheet rubber that hardness is lower, rubber grain, plastic sheet, plastic grain.
Further, described sheet rubber or rubber grain are that shore hardness is 45 rubber.
The invention allows for a kind of combining structure:
A kind of combining structure of using described combined shear connector and steel member, concrete component to form, described weldering nail is connected with steel Member Welding, described combined shear connector is connected with steel Member Welding, described concrete component is built on steel member, the seam cross direction in described gap is consistent with the less shear stiffness direction of concrete component bonding surface with steel member, the larger shear stiffness direction quadrature of the seam cross direction in described gap and steel member and concrete component bonding surface.
The present invention compared with prior art, has the following advantages and beneficial effect:
Adopt this connector, can be controlled in bonding surface shear stiffness, in the reliable situation of shear-carrying capacity deposit, improve the arrangement of shear connector, improve the stressed of shear connector, concrete component and steel member.Having guaranteed the reliable shear strength of Steel concrete bonding surface simultaneously, reduce the shear stiffness of bonding surface; Effectively reduce the concrete pulling stress being caused by concrete shrinkage, variations in temperature in Steel concrete combining structure; Reduce prestressed concrete bridge panel and girder steel bonding surface initial stage shear stiffness, effectively increase prestress application effect; Improve steel-concrete composite beam hogging moment area concrete slab stress performance; Solve the shearing skewness being caused by excessive bonding surface shear stiffness for steel-concrete member weldering nail connector group; Reduced the possibility that connector self fatigue failure is even directly cut off; Can obtain the diversified shear connector of rigidity, optimize connector arrangement.
The present invention is comparatively comprehensive to the research of connector, has the advantages that versatility is wide, accuracy is high, creates good economic benefit and scientific research and is worth.
Accompanying drawing explanation
Fig. 1 a is the overall schematic of existing weldering nail;
Fig. 1 b is the root section figure of existing weldering nail;
Fig. 2 a is the overall schematic of the weldering nail of the embodiment of the present invention one;
Fig. 2 b is the root section figure of the weldering nail of the embodiment of the present invention one;
Fig. 3 is the application schematic diagram of the embodiment of the present invention one in steel-mixed combining structure;
Fig. 4 a is the overall schematic of the weldering nail of the embodiment of the present invention two;
Fig. 4 b is the root section figure of the weldering nail of the embodiment of the present invention two;
Fig. 5 a is the overall schematic of the weldering nail of the embodiment of the present invention three;
Fig. 5 b is the root section figure of the weldering nail of the embodiment of the present invention three;
Fig. 6 a is the overall schematic of the weldering nail of the embodiment of the present invention four;
Fig. 6 b is the root section figure of the weldering nail of the embodiment of the present invention four;
Fig. 7 a is the overall schematic of the weldering nail of the embodiment of the present invention five;
Fig. 7 b is the root section figure of the weldering nail of the embodiment of the present invention five.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described.
Embodiment 1
Please refer to Fig. 2 a, 2b.Utilize joint cutter along nail bar 6 directions, to cut out a gap 7 at weldering nail 4 roots, and then obtain joint-cutting weldering nail 1.Gap 7 is positioned at nail bar 6 diametrical position.The diameter of weldering nail 4 and height are determined by the shear-carrying capacity designing requirement of Steel concrete bonding surface.Gap 7 width should be taken between 0.5mm-1.0mm, and height is determined by the shear stiffness designing requirement of Steel concrete bonding surface, but should not surpass 3/4 of selected nail bar 6 height.For avoiding the minimizing of connector shear-carrying capacity excessive, gap 7 width should not be too wide, and gap 7 width are while being greater than 0.2mm, just can play the effect that reduces largely shear stiffness.
Compare that to be cut performance identical with welding nail 4 all directions, the shear behavior that joint-cutting weldering nail 1 difference is cut direction will change, and have the feature of the rigidity opposite sex.When being cut along the wide direction of seam, due to the existence in gap 7, joint-cutting weldering nail 1 is in stressed early stage, and the part on 7 both sides, gap occurs bending and deformation respectively, and therefore early stage, shear stiffness was relatively little; Along with stressed increase, gap 7 will be closed gradually, and the part on 7 both sides, gap can form the stressed pattern of whole cooperation, so intermediary and later stages shear stiffness can get a promotion; It is very little that 4 minimizing degree are followed closely in the more conventional weldering of section area that participates in shearing resistance due to joint-cutting weldering nail 1, and therefore, this joint-cutting weldering nail 1 shear-carrying capacity is followed closely close with the conventional weldering of same specification.When being cut perpendicular to seam cross direction, joint-cutting weldering nail 1 early, middle, late stage shear stiffness and ultimate shear-carrying capacity are all close with conventional weldering nail.
During concreting member, the concrete that hardness is higher welds the gap in nail by filling joint-cutting, joint-cutting weldering nail 1 can not fully be deformed along stitching cross direction, and hinder the closure in gap 7.Therefore, filling elastic material in gap 7, can effectively avoid gap by Concrete Filled, makes joint-cutting weldering nail 1 give full play to the stress performance of the rigidity opposite sex.So gap 7 width can not be too small, otherwise cannot joint-cutting and filling elastic material.
The root weld of the combined shear connector that joint-cutting weldering nail 1 and elastomeric material are formed is on steel member, then by sheet rubber inserted into gap 7,2 concreting members 3 on steel member again, to be connected surrounding concrete reaches after design strength, and this shear connector can play the effect of transmitting internal force between steel member and concrete component.
The length in gap 7 and width have influence on the shear behavior of joint-cutting weldering nail 1.Gap 7 is longer, and early stage, rigidity was less; Gap 7 is wider, and what gap closure need to be larger is stressed, extends the stressed stage in early stage of joint-cutting weldering nail 1.Can design the length in gap 7 and width, reach instructions for use.
As shown in Figure 3, planning joint-cutting weldering nail 1 of the present invention is used in the combining structure of steel member 2 and concrete component 3 formation.Joint-cutting weldering nail 1 is welded on steel member 2, and the less shear stiffness direction that makes to stitch cross direction and Steel concrete bonding surface is consistent, and the larger shear stiffness direction of vertical lap seam cross direction and Steel concrete bonding surface is consistent.Before concrete component 3 is built, after 1 welding of joint-cutting weldering nail, in gap 7, insert elastomeric material, such as sheet rubber.Above-mentioned elastomeric material can be sheet rubber, can be also plastic sheet, can be also rubber grain and plastic grain.For convenient construction, the thickness of sheet rubber and plastic sheet is slightly less than gap width, and the material of sheet rubber should select the rubber that hardness is lower, and as the NR45 natural rubber that shore hardness is 45, plastic sheet also should be selected the plastics that hardness is lower.
In practice of construction process, joint-cutting weldering nail 1 and sheet rubber can be prefabricated in the factory, and also can configure at the construction field (site).After joint-cutting being welded to nail 1 and sheet rubber combination, concreting member 3, makes rigidity opposite sex combined shear connector play the effect that connects Steel concrete.
Embodiment 2
As shown in Fig. 4 a, 4b, on joint-cutting weldering nail 12, cut gap 13, and the position of diameter is departed from gap 13.So, the degree that reduces of the shear stiffness of joint-cutting weldering nail 12 slightly reduces compared to the joint-cutting weldering nail 1 in embodiment 1.
Embodiment 3
Fig. 5 a, 5b are the distortion of embodiment 2, and on joint-cutting weldering nail 10, the position of diameter is departed from gap 11, and has less radian with respect to nail bar, and the ratio of the horizontal projection length L of the camber line height H in gap 11 and camber line is less than or equal to 1/10.By the variation to gap 11,13 width, length, can obtain the joint-cutting weldering nail of different shear stiffnesses.Gap curve form is designed to weldering nail, and to be cut variant consistent, makes weldering nail more easily be cut distortion, and shear stiffness is less.
Embodiment 4
As shown in Fig. 6 a, 6b, on joint-cutting weldering nail 9, two gaps 8 have been cut.Article two, gap 8 symmetries are positioned at the nail bar 6 diameter left and right sides, and insert sheet rubber in every gap 8.The rigidity opposite sex shear connector 1 that the present embodiment obtains is less along seam cross direction rigidity.The height in gap 8 is determined by the shear stiffness designing requirement of Steel concrete bonding surface, but should not surpass 3/4 of selected weldering nail 4 height.Gap number is more, and rigidity reduces more.
By adjusting the direction in gap, can adjust along the shear stiffness of gap direction shearing resistance and vertical clearance gap direction, reach the requirement that meets different structure.
Embodiment 5
As shown in Fig. 7 a, 7b, the gap 15 of cutting two quadratures on joint-cutting weldering nail 14, so can be so that the shear stiffness of both direction reduces simultaneously.The shear-carrying capacity deposit of joint-cutting weldering nail 14 is reliable, but shear stiffness is whole, declines.
In Steel concrete combining structure, adopt rigidity ahermatypic combined shear connector of the present invention, in, the reliable situation of shear-carrying capacity deposit controlled in bonding surface shear stiffness, make bonding surface there is different shear stiffnesses in the different directions of being cut, solve bonding surface shear stiffness and shear-carrying capacity, concrete is stressed, and stressed etc. inharmonious of weldering nail, thereby in the situation that not affecting Steel concrete bonding surface shear strength, improve structure tension performance.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and the improvement of making for the present invention and modification all should be within protection scope of the present invention.
Claims (10)
1. a combined shear connector, comprises weldering nail, it is characterized in that:
Described weldering nail is provided with at least one gap at its root along nail bar direction, in described gap, is filled with elastic component.
2. combined shear connector as claimed in claim 1, is characterized in that: described weldering nail is provided with a gap, and described gap is in the diametrical position in described nail bar cross section.
3. combined shear connector as claimed in claim 1, is characterized in that: described weldering nail is provided with a gap, and described gap position departs from described nail bar diameter of section.
4. combined shear connector as claimed in claim 3, is characterized in that: the ratio of the horizontal projection length L of the camber line height H in described gap and camber line is less than or equal to 1/10.
5. combined shear connector as claimed in claim 1, it is characterized in that: described weldering nails on and is provided with two gaps, and described two gap symmetries is positioned at described nail bar diameter of section both sides.
6. combined shear connector as claimed in claim 1, is characterized in that: described weldering nail is provided with the gap of two quadratures.
7. the combined shear connector as described in claim 1 to 6 any one, is characterized in that: described gap width is more than or equal to 0.5mm, is less than or equal to 1.0mm, and described chinky altitude is less than or equal to 3/4 of described nail bar height.
8. combined shear connector as claimed in claim 7, is characterized in that: described elastic component is any in sheet rubber that hardness is lower, rubber grain, plastic sheet, plastic grain.
9. combined shear connector as claimed in claim 8, is characterized in that: described sheet rubber or rubber grain are that shore hardness is 45 rubber.
10. the combining structure that the combined shear connector described in a right to use requirement 1 and steel member, concrete component form, it is characterized in that: described combined shear connector and steel member (2) are welded to connect, described concrete component (3) is built on steel member (2), the seam cross direction in described gap is consistent with the less shear stiffness direction of concrete component (3) bonding surface with steel member (2), the larger shear stiffness direction quadrature of the seam cross direction in described gap and steel member (2) and concrete component (3) bonding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514720.0A CN102966181B (en) | 2012-12-05 | 2012-12-05 | Rigidity-heterosexual type combined shear connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514720.0A CN102966181B (en) | 2012-12-05 | 2012-12-05 | Rigidity-heterosexual type combined shear connector |
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| Publication Number | Publication Date |
|---|---|
| CN102966181A CN102966181A (en) | 2013-03-13 |
| CN102966181B true CN102966181B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210514720.0A Expired - Fee Related CN102966181B (en) | 2012-12-05 | 2012-12-05 | Rigidity-heterosexual type combined shear connector |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437495B (en) * | 2013-07-18 | 2016-12-07 | 浙江中隧桥波形钢腹板有限公司 | Flexible rubber ring combinative structure connecting key |
| CN104097363B (en) * | 2014-07-31 | 2016-06-22 | 江苏爵格工业设备有限公司 | A kind of antiknock PLASTIC LAMINATED and preparation method thereof |
| CN105604193B (en) * | 2016-01-11 | 2017-11-03 | 北京城建设计发展集团股份有限公司 | The elastic sheet material of nonelastic loss and hard material point type composite connecting method |
| CN111502084A (en) * | 2020-04-29 | 2020-08-07 | 南宁学院 | Combined steel plate wall connecting structure |
| CN116305413A (en) * | 2023-01-19 | 2023-06-23 | 安徽省交通控股集团有限公司 | Wedge-shaped section combined shear design method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368139A (en) * | 1993-07-02 | 1994-11-29 | General Motors Corporation | Drum brake shoe hold down nail and spring retainer |
| CN101831869A (en) * | 2010-05-07 | 2010-09-15 | 同济大学 | Connecting structure of combined beam and concrete bearing cross beam |
| CN102493552A (en) * | 2011-11-29 | 2012-06-13 | 中铁二院工程集团有限责任公司 | Shear force connection member for flexible welding nails of combined structure of steel and concrete |
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