CN209958210U - Variable-rigidity shear connecting piece and steel-concrete combined structure - Google Patents
Variable-rigidity shear connecting piece and steel-concrete combined structure Download PDFInfo
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- CN209958210U CN209958210U CN201920367339.3U CN201920367339U CN209958210U CN 209958210 U CN209958210 U CN 209958210U CN 201920367339 U CN201920367339 U CN 201920367339U CN 209958210 U CN209958210 U CN 209958210U
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- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 239000000806 elastomer Substances 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000002131 composite material Substances 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 238000010008 shearing Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000005291 magnetic effect Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a become rigidity shear force connecting piece and steel-concrete integrated configuration, become rigidity shear force connecting piece and include: a screw; the nut is arranged at one axial end of the screw rod, and the cross sectional area of the nut is larger than that of the screw rod; the magnetorheological elastomer pipe is sleeved on the screw rod. According to the utility model discloses become rigidity shear connector can carry out the effect release that shears that is aimed at according to actual result of use.
Description
Technical Field
The utility model belongs to the technical field of bridge structures technique and specifically relates to a become rigidity shear force connecting piece and have its steel-concrete integrated configuration.
Background
The steel-concrete composite structure has wide application in the field of bridges. The steel-concrete combined structure enables the steel beam and the concrete slab to form a combined action through the stud connecting piece, the steel beam is easy to destabilize under compression and has good tensile performance, the concrete is easy to crack under tension and has good compressive performance, the steel beam is placed in a tensile area as much as possible, the concrete is placed in a compressive area as much as possible, and the advantages of the steel-concrete combined structure are fully exerted.
In practice, however, the combined action between the steel beam and the concrete may place the composite beam in tension in the concrete, most commonly in the hogging moment region, local stress concentration region, and transition region. Furthermore, tensile stresses in the concrete slab may be generated due to shrinkage creep and temperature effects, etc., and the constraint of the peg attachment prevents these tensile stresses from being effectively relieved. Which has a very adverse effect on the performance, long-term performance and durability of the composite structure.
The traditional stud connector mainly has two functions of shearing resistance and pulling resistance in a combined structure. The anti-pulling mainly resists the vertical separation of the concrete slab and the steel beam, the anti-shearing mainly limits the free sliding between the steel beam and the concrete slab, ensures the cooperative deformation between the steel beam and the concrete slab, works together, and improves the section rigidity and the bearing capacity. Wherein the anti-pulling effect is of great significance to ensure the structural integrity and the interface durability, and the shearing resistance can cause the concrete slab in the hogging moment area of the combined structure to generate tensile stress. It is therefore necessary to control the shear transfer between the steel beam and the concrete slab to address the problem of cracking in the composite structural concrete due to tensile stress. The traditional stud connecting piece is resistant to pulling and shearing, and the utility model of Qinghua university Nie construction state and the like provides a connecting piece which is resistant to pulling and shearing and basically releases shear connection completely. In practical use, it is necessary to release the shear resistance according to practical use effect.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a become rigidity shear connector, become rigidity shear connector can carry out the shear effect release that aims at according to actual result of use.
The utility model also provides a steel-concrete integrated configuration who has above-mentioned variable rigidity shear force connecting piece.
According to the utility model discloses become rigidity shear connector of first aspect embodiment, include: a screw; the nut is arranged at one axial end of the screw rod, and the cross sectional area of the nut is larger than that of the screw rod; the magnetorheological elastomer pipe is sleeved on the screw rod.
According to the utility model discloses become rigidity shear force connecting piece through combining the become rigidity shear force connecting piece that proposes steerable shear force transmission with "resistance to plucking does not shear" peg, provides the effect of resistance to plucking through the combination of nut and screw rod, and the interface shear force transmission of the special point control steel of becoming rigidity through the magnetic current rheology elastomer pipe that the screw rod overlaps and concrete can carry out the shear effect release to according to actual result of use.
In addition, according to the utility model discloses variable rigidity shear force connecting piece can also have following additional technical characterstic:
according to the utility model discloses an embodiment, the screw rod with the nut can be dismantled and link to each other.
Optionally, an internal thread is arranged on the nut, and an external thread meshed with the internal thread is arranged on the screw rod.
According to the utility model discloses an embodiment, the screw rod with the nut is integrated into one piece.
According to an embodiment of the present invention, the screw cap is covered with a magnetorheological elastomer cap.
According to the utility model discloses steel-concrete integrated configuration of second aspect embodiment includes: the concrete slab comprises a steel beam and a concrete slab arranged on the steel beam; according to the utility model discloses the variable rigidity shear force connecting piece of above-mentioned first aspect embodiment, the axial other end of screw rod weld in on the girder steel, variable rigidity shear force connecting piece inlays to be located in the concrete slab.
According to the utility model discloses steel-concrete integrated configuration is through setting up the basis the utility model discloses the variable rigidity shear connector of above-mentioned first aspect embodiment for steel-concrete integrated configuration has the above-mentioned whole advantages that variable rigidity shear connector has, and it is no longer repeated here.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a perspective view of a variable stiffness shear connector according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the variable stiffness shear connection shown in FIG. 1 mated to a steel beam;
FIG. 3 is a schematic view of a threaded rod of the variable stiffness shear connection shown in FIG. 1;
FIG. 4 is a schematic view of the screw and magnetorheological elastomer tube mating of the variable stiffness shear connection shown in FIG. 1;
FIG. 5 is a schematic view of the screw and magnetorheological elastomer tube, nut mating of the variable stiffness shear connection shown in FIG. 1;
fig. 6 is a cross-sectional view of a steel-concrete composite structure according to an embodiment of the present invention.
Reference numerals:
a variable stiffness shear connection 100;
a screw 1; an external thread 11;
a nut 2;
a magnetorheological elastomer tube 3;
a magnetorheological elastomer cap 4;
a steel-concrete composite structure 200; a steel beam 201; a concrete slab 202.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
A variable stiffness shear connection 100 in accordance with an embodiment of a first aspect of the present invention is described below with reference to fig. 1-6.
Referring to fig. 1-6, a variable stiffness shear connector 100 according to an embodiment of the present invention includes: a screw rod 1, a screw cap 2 and a magneto-rheological elastomer tube 3.
The nut 2 is arranged at one axial end of the screw rod 1 (the upper end of the screw rod 1 shown in figures 1-2 and 6), the cross section area of the nut 2 is larger than that of the screw rod 1, and the magnetorheological elastomer pipe 3 is sleeved on the screw rod 1.
The variable stiffness shear connection 100 is used in a steel-concrete composite structure 200, the steel-concrete composite structure 200 comprises a steel beam 201 and a concrete slab 202 arranged on the steel beam 201, the variable stiffness shear connection 100 is used for connecting the steel beam 201 and the concrete slab 202, the other axial end (the lower end as shown in fig. 1-2 and 6) of the screw 1 is welded on the steel beam 201 (for example, welded on the upper flange of the steel beam 201), the variable stiffness shear connection 100 is embedded in the concrete slab 202, and the variable stiffness shear connection 100 is embedded in the concrete slab 202 by pouring, for example, so that the steel beam 201 and the concrete slab 202 are connected through the variable stiffness shear connection 100.
The magnetorheological elastomer tube 3 is made of a magnetorheological elastomer material. The magnetorheological elastomer is composed of high molecular polymers (such as rubber and the like) and ferromagnetic particles, the polymers mixed with the ferromagnetic particles are solidified under the action of an external magnetic field, and the particles form an ordered structure in a matrix by utilizing the magnetorheological effect (namely the ferromagnetic particles form a chain or columnar aggregation structure in the direction of the magnetic field). The magnetorheological elastomer has excellent mechanical property, electrical property and magnetic property. Under the action of an external magnetic field, different rigidities can be generated, and the vibration damping and isolating device has a plurality of applications in the field of civil engineering, particularly in the aspects of vibration damping and isolating.
The magnetorheological elastomer tube 3 is provided with a power supply, the intensity of an external magnetic field can be controlled by controlling the magnitude of current, so that the rigidity of the magnetorheological elastomer tube 3 is controlled, and when the current is small or the current is not electrified, the rigidity of the magnetorheological elastomer tube 3 is small, so that the shearing force between the concrete and the steel beam 201 of the combined structure cannot be effectively transferred; when the current is large, the rigidity of the magnetorheological elastomer pipe 3 is large, the shearing force between the combined structure concrete and the steel beam 201 can be effectively transmitted, and the cracking problem of the concrete in the combined structure can be effectively controlled.
The requirement of concrete pulling resistance in the steel-concrete combined structure 200 is met through the screw rods 1 and the screw caps 2, and the rigidity of the steel-concrete combined structure is controlled by controlling the current of the magnetorheological elastomer tube 3, so that the shear force transmission of the interface of the steel-concrete combined structure 200 is adjusted. Therefore, the cracking of the concrete slab 202 of the steel-concrete combined structure 200 can be effectively controlled, and the structure is simple and convenient to construct.
According to the utility model discloses become rigidity shear connector 100, through combining magnetorheological elastomers and "resistance to plucking does not shear" peg to propose the variable rigidity shear connector 100 of steerable shear force transmission, the combination through nut 2 and screw rod 1 provides the effect of resistance to plucking, shear force transmission between the interface of variable rigidity special point control steel and concrete through the magnetorheological elastomers body pipe 3 that screw rod 1 overlaps, can carry out the shear effect release that aims at according to the result of use of reality, can realize the control to shear force transmission between steel-concrete integrated configuration 200 bridge interface from this.
In an embodiment of the present invention, the screw rod 1 is detachably connected to the nut 2, so that the assembly of the magnetorheological elastomer tube 3 is facilitated, and the construction is convenient. For example, the lower end of the screw 1 can be welded on the flange of the steel beam 201 at first, so that the reliable connection between the screw 1 and the steel beam 201 is ensured; then sleeving the magnetorheological elastomer tube 3 on the screw rod 1; finally, the nut 2 is connected to the upper end of the screw 1. Alternatively, as shown in fig. 2 to 6, the nut 2 is provided with an internal thread, and the screw 1 is provided with an external thread 11 engaged with the internal thread. Namely, the nut 2 and the screw rod 1 are assembled together through threaded connection to form a connection similar to a stud, so that the anti-pulling effect is ensured.
In an embodiment of the present invention, the screw rod 1 and the nut 2 are integrally formed, that is, the screw rod 1 and the nut 2 are manufactured by integral processing, so that the connection strength between the screw rod 1 and the nut 2 can be improved. At this time, during assembly, the magnetorheological elastomer tube 3 needs to be sleeved on the screw rod 1, and then the lower end of the screw rod 1 is welded on the flange of the steel beam 201.
In one embodiment of the present invention, as shown in fig. 1-2 and 6, the screw cap 2 is covered with a magnetorheological elastomer cap 4, and the magnetorheological elastomer cap 4 is made of a magnetorheological elastomer material. Thereby further controlling the shear transfer between the steel and concrete interface.
In a particular embodiment of the present invention, as shown in fig. 1-6, the variable stiffness shear connection 100 includes a screw 1, a nut 2, a magnetorheological elastomer tube 3, and a magnetorheological elastomer cap 4. The screw cap 2 is arranged at the upper end of the screw rod 1, the cross section area of the screw cap 2 is larger than that of the screw rod 1, the magnetorheological elastomer tube 3 is sleeved on the screw rod 1, and the magnetorheological elastomer cap 4 is sleeved on the screw cap 2. The upper end of screw rod 1 is equipped with external screw thread 11, is equipped with the internal thread in the nut 2, and the internal thread cooperates with external screw thread 11, realizes being connected between screw rod 1 and the nut 2 from this. The variable stiffness shear connection member 100 is used in a steel-concrete composite structure 200, the steel-concrete composite structure 200 comprises a steel beam 201 and a concrete slab 202 arranged on the steel beam 201, the variable stiffness shear connection member 100 is used for connecting the steel beam 201 and the concrete slab 202, the lower end of a screw 1 is welded on the upper flange of the steel beam 201, the variable stiffness shear connection member 100 is embedded in the concrete slab 202 by pouring for example, and therefore the steel beam 201 and the concrete slab 202 are connected through the variable stiffness shear connection member 100.
The external thread 11 on the screw rod 1 is matched with the internal thread in the screw cap 2, and the inner diameter of the magnetorheological elastomer tube 3 is slightly larger than the outer diameter of the screw rod 1, so that the magnetorheological elastomer tube 3 is sleeved on the screw rod 1 more smoothly and conveniently. The magnetorheological elastomer cap 4 just firmly wraps the screw cap 2, so that falling off during concrete pouring can be prevented.
The embodiment of the utility model provides a concrete implementation step as follows:
1. the lower end of the screw 1 is welded on the steel beam 201 in a manner similar to that of a welding stud;
2. a magnetorheological elastomer tube 3 is sleeved on the screw rod 1;
3. screwing a nut 2 at the upper end of the screw rod 1;
4. the magnetorheological elastomer cap 4 is sleeved on the screw cap 2.
The utility model discloses variable rigidity shear connector 100 compares with prior art, has following effect of showing:
(1) the transfer control of the shear force between the steel and concrete interfaces is realized, the tensile stress generated by the concrete slab 202 is further controlled, and the long-term performance, the service performance and the durability of the steel-concrete combined structure 200 are effectively improved. (2) The construction is simple, convenient and fast, the construction quality is easy to guarantee, the connecting piece is convenient to obtain, the structure is simple, the economical efficiency is good, and the field construction amount is reduced. (3) The pullout resistance is maintained, and the structural integrity and the interface durability of the steel-concrete composite structure 200 are ensured.
A steel-concrete composite structure 200 according to an embodiment of the second aspect of the present invention is described below with reference to fig. 6.
As shown in fig. 6, a steel-concrete composite structure 200 according to an embodiment of the second aspect of the present invention includes: a steel beam 201 and a concrete plate 202 arranged on the steel beam 201; according to the utility model discloses the variable rigidity shear connector 100 of the above-mentioned first aspect embodiment, the axial other end of screw rod 1 welds on girder steel 201, and variable rigidity shear connector 100 inlays and locates in concrete slab 202.
According to the utility model discloses steel-concrete integrated configuration 200 is through setting up the basis the utility model discloses the variable rigidity shear connector 100 of above-mentioned first aspect embodiment for steel-concrete integrated configuration 200 has the above-mentioned whole advantages that variable rigidity shear connector 100 has, and it is no longer repeated here.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not being in direct contact, but rather being in contact with each other through additional features therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A variable stiffness shear connector, comprising:
a screw;
the nut is arranged at one axial end of the screw rod, and the cross sectional area of the nut is larger than that of the screw rod;
the magnetorheological elastomer pipe is sleeved on the screw rod.
2. A variable stiffness shear connector as claimed in claim 1 wherein the screw is releasably connected to the nut.
3. A variable stiffness shear connection according to claim 2, wherein the nut is provided with an internal thread and the screw is provided with an external thread which engages with the internal thread.
4. A variable stiffness shear connector as claimed in claim 1 wherein the screw and nut are an integral moulding.
5. A variable stiffness shear connector according to claim 1 wherein a magnetorheological elastomer cap is sheathed over the nut.
6. A steel-concrete composite structure, comprising:
the concrete slab comprises a steel beam and a concrete slab arranged on the steel beam;
a variable stiffness shear connection according to any one of claims 1 to 5, the other axial end of the screw being welded to the steel beam, the variable stiffness shear connection being embedded in the concrete slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367339.3U CN209958210U (en) | 2019-03-21 | 2019-03-21 | Variable-rigidity shear connecting piece and steel-concrete combined structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367339.3U CN209958210U (en) | 2019-03-21 | 2019-03-21 | Variable-rigidity shear connecting piece and steel-concrete combined structure |
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| CN209958210U true CN209958210U (en) | 2020-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826088A (en) * | 2019-03-21 | 2019-05-31 | 清华大学 | A kind of variation rigidity shear connector |
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2019
- 2019-03-21 CN CN201920367339.3U patent/CN209958210U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826088A (en) * | 2019-03-21 | 2019-05-31 | 清华大学 | A kind of variation rigidity shear connector |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210630 Address after: 100084 Tsinghua Yuan, Beijing, Haidian District Patentee after: TSINGHUA University Patentee after: China National Railway Group Co.,Ltd. Address before: 100084 Tsinghua Yuan, Beijing, Haidian District Patentee before: TSINGHUA University |
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| TR01 | Transfer of patent right |