CN107558615A - Friction-type shaped steel shear connector and its construction method - Google Patents
Friction-type shaped steel shear connector and its construction method Download PDFInfo
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- CN107558615A CN107558615A CN201710797526.0A CN201710797526A CN107558615A CN 107558615 A CN107558615 A CN 107558615A CN 201710797526 A CN201710797526 A CN 201710797526A CN 107558615 A CN107558615 A CN 107558615A
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Abstract
The invention discloses a kind of friction-type shaped steel shear connector and its construction method, the shear connector is channel-section steel including shear connector main body described in shear connector main body and high-strength bolt component, one of edge of a wing side is provided with several bolts hole coordinated with the high-strength bolt component, and the connector main body is connected by high-strength bolt component with the girder.Present invention improves the power transmission pattern of traditional shear connector, rationally utilize the interface friction force between shear connector and plate, and high-strength bolt is rationally designed, the shearing force of bolt can be monitored and controlled in real time, and prefabrication degree is high, scene carries out bolt splicing, saves labour cost.
Description
Technical field
The present invention relates to shear connector and its construction method, more particularly to a kind of friction-type shaped steel shear connector and
Its construction method.
Background technology
Shear connector has peg shear connector and shaped steel shearing in steel construction or steel performance
The major class of connector two, mainly there are two aspects to act on：(1) shearing resistance：Undertake the longitudinal direction between two kinds of material interfaces of steel and concrete cut should
Longitudinal direction between both power, limitation interfaces slidably so as to ensure that the cooperative transformation of combining structure, cooperation, improves
The rigidity and bearing capacity of combining structure.(2) resistance to plucking：Shear connector typically sets pier nose or volume in the side for going deep into concrete
Side, it is snapped tight against with concrete, resistance concrete because generally longitudinally bending or partial lateral bending caused by two kinds of materials
Disengaging, enhance globality, be allowed to cooperation.
Traditional shear connector shears larger typically based on peg shear connector in styletable, beam or bottom plate etc.
Opening position is welded, and is passed as shown in figure 1, carrying out the shearing between steel and concrete to the squeezing action of connector by concrete
Pass, connector pier nose or shaped steel build-in make both form an overall cooperation in concrete.It is strong for steel pull resistance, mix
The characteristics of native compressive property is good is coagulated, girder steel is generally placed on tension section, concreting is connected in compression section with shearing
Fitting connects to form combining structure, has given full play to both respective excellent properties.But need to weld shearing larger opening position
The shear connector connect is intensive, and steel using amount is significantly increased, and as shown in Figure 1, this significantly improves engineering cost, and difficulty of construction adds
Greatly；Three-level weld seam is generally between steel and peg shear connector, welding quality is not easy to ensure, welding process makes steel by very high temperature
Stress is spent, bends so as to produce welding residual stress and local drum and waits adverse effect.For the holder segments of multi-span continuous bridge, tiltedly
The drag-line and bridge floor contact area section of suspension bridge are drawn, greatly across the hogging moment areas such as the transition zone of load-bearing combining structure and shrinkage and creep
With temperature effect caused by concrete stress area, because the effect of restraint of traditional shear connector makes the stress of concrete can not
Release, cause concrete cracking, wedge action weakens, or even loses the performance of combining structure.Connected by traditional shear connector
The steel of system and the combining structure of concrete easily produce fatigue crack, caused under the reciprocal high strain-rate load action such as earthquake
Connector failure by shear, the consequence such as cause anti-seismic performance bad.
Traditional shear connector failure mode is generally failure by shear, tensile failure or concrete punching failure, with
The resistivity of material is as major design index, and using " anti-" as major design theory, this mode makes interface friction force not
It can be monitored in real time, shear-carrying capacity and rigidity are uncontrolled, and concrete internal force can not effectively be discharged.Search to the bottom, this
It is as caused by the imperfection of the unreasonable of power transmission pattern and design.
The content of the invention
Goal of the invention：To solve the deficiencies in the prior art, there is provided a kind of rationally to utilize the boundary between shear connector and plate
Face frictional force, while shear stiffness and the controllable novel friction type shaped steel shear connector of shear-carrying capacity and its construction method.
Technical scheme：A kind of friction-type shaped steel shear connector, including shear connector main body and high-strength bolt component,
The shear connector main body is channel-section steel, and some bolts hole are provided with the edge of a wing of channel-section steel；High-strength bolt component is included at least
The spiro rod section of one section of threaded portion is provided with, the first nut and the second nut being spirally connected with the spiro rod section, is set on spiro rod section
And the semiconductor spring between the first nut and the second nut, the sleeve of semiconductor spring periphery is socketed in, is arranged on
One nut or the second nut side and the both positive and negative polarity sheet metal that can be connected with ohmmeter, and electrical connection both positive and negative polarity sheet metal and half
The wire of conductor both ends of the spring；
The side of first nut or the second nut be provided with for the neck with semiconductor spring end clamping or with for
When the relative distance of the caulking groove connected with sleeve one end, the first nut and the second nut changes, semiconductor spring is stretched or pressed
Contracting.
Rubber ring is socketed with the outside of sleeve and/or the semiconductor spring.
The screw rod end is longitudinally divided into multiple regions along it, and the color of different zones is different.
In another embodiment, a kind of friction-type shaped steel shear connector, including shear connector main body and high-strength bolt
Component, the shear connector main body are channel-section steel, and one of edge of a wing side is provided with several and the high-strength bolt component
The bolt hole of cooperation, the connector main body are connected by high-strength bolt component with girder.
The high-strength bolt component includes nut, thread segment, nut, outer sleeve and semiconductor spring, the nut
Top surface is provided with neck；Nut, outer sleeve and semiconductor spring are in turn connected to form one by predetermined manner during prefabrication
It is overall, and nut, outer sleeve and semiconductor spring three are coaxial；Nut is from one end precession of thread segment, semiconductor spring, overcoat
Cylinder and nut are inserted in from the other end of thread segment, and the neck of semiconductor spring and nut top surface is connected together, nut and thread segment
Between be spirally connected；
The thread segment is provided with different pretension partition identifications, starts to be sequentially provided with threaded area with one end of nut precession
Domain 0, threaded portion 1, threaded portion 2, threaded portion 3 and threaded portion 4；Using the upper surface of nut as index plane, when partly leading
Body spring is embedded in neck, and now semiconductor spring is in the raw；When nut upper end surface is in threaded portion 0 and threaded area
When the interface or threaded portion 0 in domain 1, do not clamped between shear connector and beam or plate now, the pretension of bolt is 0kN；
When the upper surface of nut is respectively at threaded portion 1 to threaded portion 4, corresponding bolt pretension scope is respectively 0-5kN,
5-10kN, 10-15kN and 15-20kN, rotating nuts change subregion of the nut upper surface in thread segment, to change pretension and boundary
Face frictional force, realize the preliminary control of shear-carrying capacity and rigidity.
The bottom surface of the nut is provided with cross bore, the first sheet metal and the second sheet metal, and neck one end of nut top surface is set
There is connector；When semiconductor spring is engaged on neck, it forms built-in circuit, and half with nut by neck and connector
One end of conductor spring is connected by connector with the first or second sheet metal, and the other end of semiconductor spring passes through wire and
Two or first sheet metal connection；Resistance between first sheet metal and the second sheet metal can be measured by ohmmeter, i.e., partly led
The resistance value of body spring, the pretension of the high-strength bolt component is further obtained, then change nut tightness adjusting according to resistance
Degree realizes the accurate control of shear-carrying capacity and rigidity.
The friction-type shear connector also includes the rubber ring being arranged between high-strength bolt component and girder screwed hole.
The bolt hole coordinated with the high-strength bolt component is stay bolt hole or circle bolt hole.
The connector main body is Q345 hot-rolled steel sections, and the thread segment is 8.8 grades of M20 type bolts, described to be used to install
The girder of the shear connector is H profile steel girder.
A kind of construction method of friction-type shaped steel shear connector, the friction-type shaped steel shear connector used in this method are
Above-mentioned friction-type shaped steel shear connector, the construction method comprise the following steps：
(1) prefabrication is carried out to the friction-type shaped steel shear connector
Size, shearing resistance effect according to needed for job site and the target to reach, process the friction-type shaped steel and cut
Power connector；
(2) the assembled friction-type shaped steel shear connector in job site sets the friction-type shaped steel shearing to connect with needing
The girder or plate of fitting；
(3) pretension of high-strength bolt is adjusted during use in real time according to the state of combined member；
The step (1) includes：
(11) component manufactures and designs
The relevant position that need to set the girder of shear connector is punched according to design requirement, the size according to needed for scene
The individual component of shaped steel shear connector is manufactured and processed with the requirement of shearing resistance effect design, is carried according to the shearing resistance reached in advance
Power, rigidity and performance are designed to the pretension of high-strength bolt component, then according to prefabrication flow chart to high intensity
Bolt assembly produces with connector main body sample；
(12) component preassembling
Preassembling should be carried out to component, nut, outer sleeve and semiconductor spring are sequentially coaxially set and led to before dispatching from the factory
Cross welding manner and form entirety, adjust bore size and deformation, the logical closed state of circuit where detection semiconductor spring, measurement half
Whether the resistance of conductor spring and the subregion where nut and pretension are corresponding；After preassembling is qualified, the quantization life of product is carried out
Production；
The step (2) includes：
(21) connector main body is alignd with the stay bolt hole of beam or plate, assembly, shaped steel is carried out with high-strength bolt component
The edge of a wing of shear connector can prevent starting for concrete, the boundary formed by high-strength bolt component the clamping force plate
Face frictional force shearing resistance；
(22) in installation process, the nut of high-strength bolt component is screwed with spanner, is screwed into nut by design requirement
Correspondingly sized pretension region, then with ohmmeter measure semiconductor spring resistance, pretension is adjusted until up to
Untill required shear-carrying capacity and rigidity；
The step (3) is specially：
In use, the top of beam or plate has all been poured in concrete, and only nut is exposed to outside, now passes through
The cross bore of nut changes the tightness of bolt, controls the pretension of bolt, thus discharges the bad internal force of concrete or changes
The kind consequence for causing shear behavior to reduce due to bolt looseness.
Beneficial effect：Compared with prior art, the invention has the advantages that：
(1) prefabrication degree is high, and scene carries out bolt splicing, saves labour cost.
(2) traditional shear connector is converted into by the squeezing action Transfer of Shear with concrete and passes through interface friction
The pattern of Transfer of Shear is acted on, dramatically enhances the shearing resistance effect of shear connector, is replaced with shaped steel shear connector
Peg shear connector, reduce shear connector steel using amount and set pier nose workload, saved work and material into
This simultaneously prevents starting for concrete.
(3) in installation process, the thread segment of novel friction type high-strength bolt has obvious partition identification, i.e. nut revolves
To different regions, it is possible to provide corresponding pretension, realize the preliminary control of pretension and interface friction force.Due to nut, set
Cylinder has been connected as a single entity with semiconductor spring, and the spring footpath heart and the ring heart in sleeve section are in same plane, when nut is rotated down
When, semiconductor spring is gradually compressed, and spring section increase, length reduces；When nut rotates up, semiconductor spring is gradual
It is elongated, spring section reduces, length increase.Elongation or compression semiconductor spring are inevitably resulted in anyway, change half
The area of section and length of conductor spring, the resistance of semiconductor spring is monitored according to resistance formula R=ρ * (L/S), it is real
The accurate control of existing pretension and interface friction force.
(4) after concreting finishes to form combining structure, due to the nut and spiral shell of novel friction type high-strength bolt
Female all rotatable tightness to change between bolt, nut and plate, during combining structure normal use, according to reality
Use state and increase in demand or the pretension for reducing bolt, shear-carrying capacity and the rigidity for reaching shear connector is controlled
Effect, concrete is effectively avoided ftracture and bolt was using because the reason such as shrink or creep causes interface shearing-resistance effect excessive
The situation that shearing resistance effect caused by being loosened in journey reduces.
(5) due to the squeezing action of shear connector is converted into rubbing action and Transfer of Shear, sheared different from tradition
Damage of the connector in the case where welding high temperature to the opening position or welding termination, novel friction type shaped steel shear connector is by rubbing
Power Transfer of Shear is wiped, and bolt hole is stay bolt hole, will not be to the master of the opening position of bolt, hole wall and setting shear connector
Beam, bottom plate cause to damage.The fatigue problem under Cyclic Loading and under high strain-rate load action is effectively prevent, is had good
Antidetonation and fatigue performance.
Brief description of the drawings
Fig. 1 a- Fig. 1 b are the peg shear connector schematic diagrames that prior art central sill or plate are set；
Fig. 2 a- Fig. 2 b are the structural representations of friction-type channel-section steel shear connector；
Fig. 3 is friction-type shaped steel shear connector agent structure schematic diagram；
Fig. 4 is the structural representation of friction-type angle steel shear connector；
Fig. 5 is high-strength bolt component structure diagram；
Fig. 6 a- Fig. 6 f are each modular construction schematic diagrames of high-strength bolt component；
Fig. 7 is the pre-splicing structural representation of high-strength bolt factory of component；
Fig. 8 a- Fig. 8 b are the effects factor schematic diagrames of metal surface coefficient of friction；
Fig. 9 is power transmission ideograph；
Figure 10 is the screw thread partition identification figure of high-strength bolt component；
Figure 11 is the built-in circuit figure formed by semiconductor spring；
Figure 12 is the high-strength bolt component structure diagram with rubber ring；
Figure 13 is rubber ring structural representation；
Figure 14 is peg shear connector structure schematic diagram；
Figure 15 a to Figure 15 f are each modular construction schematic diagrames of peg shear connector；
Figure 16 is peg shear connector mounting structure schematic diagram.
Embodiment
Technical scheme is described in detail below in conjunction with the accompanying drawings.
Fig. 1 a and Fig. 1 b are the peg shear connector schematic diagram that prior art central sill or plate are set.Understand that shearing connects in figure
Fitting needs to be welded on beam or plate, and labor intensity is big, and waste of materials.
It is friction-type channel-section steel shear connector, it includes connector main body 201 and high-strength bolt as shown in Fig. 2 a- Fig. 3
Component 202, wherein, connector main body is arranged on H profile steel girder 203 by high-strength bolt component, and bolt hole 204 is long spiral shell
Keyhole.The girder, which can be replaced between any shaped steel or plate etc., to be needed to set the position of shear connector.Institute is pressed on H profile steel girder
The shearing resistance requirement installation connecting element main body at a certain distance needed, the connector main body are channel-section steel, its installation direction with it is known
Shear direction is vertical, can strengthen shear-carrying capacity and rigidity.
Connector main body is Q345 hot-rolled steel sections, and its correspondence position sets the stay bolt coordinated with high-strength bolt component
Hole, the position of installation connecting element main body is needed on H profile steel girder to be provided with the stay bolt hole coordinated with high-strength bolt component, long spiral shell
Keyhole aperture is 50mm × 22mm.
In use, the edge of a wing side of the connector main body of the friction-type shaped steel shear connector is snapped in concrete, effectively
Avoid concrete to separate with starting for girder steel, reduce the workload that traditional peg shear connector sets pier nose.Due to type
The shearing resistance of steel shear connector, anti-bending bearing capacity and rigidity are all very big, and stay bolt hole is not directly contacted with bolt and hole wall, solution
Determine fatigue problem, avoided material damage.
As shown in figure 4, connector main body can also select angle steel, it includes connector main body 101 and high-strength bolt group
Part 102, wherein, connector main body is arranged on H profile steel girder 103 by high-strength bolt component, and bolt hole 104 is stay bolt
Hole.It is not provided with position of fixity, eliminates " resistance to plucking " effect and the wedge action of traditional shear connector, by end-face friction and
The ballast of concrete upper end is bonded both interfaces；Using the interface friction force between shear connector and shaped steel come Transfer of Shear
Reach the purpose of " shearing resistance ".In addition, the friction-type shaped steel shear connector changes traditional power transmission pattern, using frictional force this
Kind dissipative force consumption outside energy.The friction-type shear connector can realize the effect of " shearing resistance " not " resistance to plucking ", and it is in coagulation
Lack build-in and occlusion in soil, therefore shearing resistance effect is only provided, steel and concrete are quick suitable for assembled combined member
Installation and removal.
As shown in Figure 5-Figure 7, in a further embodiment, novel friction type high-strength bolt is by nut 301, outer sleeve
304th, semiconductor spring 305, thread segment 302 and nut 303 are formed.The bottom surface 5a of nut includes cross bore 306 and sheet metal
307, cross bore is used to screw bolt, changes its tightness, sheet metal is two terminations of built-in circuit；The top surface 5b of nut
Include neck 308 and connector, neck is used for build-in semiconductor spring, and connector is used in semiconductor spring and nut
Circuit is connected.When rotating nuts, pass through certain way shape when being prefabricated in the factory due to nut, outer sleeve and semiconductor spring
Integral, the ring heart in the spring footpath heart and sleeve section is in same plane, when nut is rotated down, the gradual quilt of semiconductor spring
Compression, the increase of spring section, length reduce；When nut rotates up, semiconductor spring is gradually elongated, and spring section subtracts
It is small, length increase.Elongation or compression semiconductor spring are inevitably resulted in anyway, change the area of section of semiconductor spring
And length, according to resistance formula R=ρ * L/S, i.e. resistance changes, and semiconductor spring by neck and is connected capitiform with nut
Into built-in circuit, and two sheet metals are drawn at nut, the resistance of semiconductor spring is measured by ohmmeter, obtains bolt
Pretension, so that observation interface frictional force in real time, realizes the accurate control of pretension and interface friction force.
Novel friction type shaped steel shear connector of the present invention is in installation process, novel friction type high-strength bolt
Thread segment have different pretension partition identifications.Because nut, outer sleeve and semiconductor spring cause to block to thread segment, because
This is used as index plane using the upper surface of nut.When semiconductor spring be embedded in neck in, now semiconductor spring in the raw,
Nut upper end surface does not clamp now when the interface or region 0 in region 1 and region 0 between shear connector and beam or plate,
The pretension of bolt is 0kN, when the upper surface of nut is respectively at threaded portion 1 to threaded portion 4, corresponding bolt prestretching
Power scope is 0-5kN, 5-10kN, 10-15kN and 15-20kN, and the side of thread segment different subregions is rotated to this control nut
Formula changes pretension and interface friction force, realizes the preliminary control of shear-carrying capacity and rigidity, then changes spiral shell according to resistance
Female tightness realizes the accurate control of shear-carrying capacity and rigidity.
During normal use, the nut of the controllable novel friction type high-strength bolt of pretension is rotatable to change plate
Tightness between part, similarly, it can also change the tightness between plate, i.e. rotary nut and spiral shell by the cross bore of nut
Female pretension for being all tensioned or discharging tightening latch.The nut of the bolt is still exposed to outer in use, can pass through the ten of nut
Word hole changes the pretension of bolt, so as to change structure shear-carrying capacity in use and rigidity, according to observation resistance
The tightness for changing bolt realizes the accurate control of shear-carrying capacity and rigidity.
Following phenomenon can occur for the combining structure that novel friction type shaped steel shear connector of the present invention links：1. spiral shell
Shearing weakens caused by bolt loosens；Creep 2. concrete is shunk, because the shearing of shear connector is larger, lead
Internal stress is caused not discharge, concrete ftractures.Novel friction type shaped steel shear connector rotatable spiral shell in use
Cap, change the pretension of bolt and the frictional force at interface, make shear-carrying capacity and rigidity controlled, reach the effect of " anti-to put combination "
Fruit, avoid the coup injury of structure.
The installation process of the present embodiment is：
Shaped steel shear connector and novel friction type high-strength bolt are imitated according to the required size in scene, required shearing resistance
Fruit and the target to reach carry out prefabrication.Nut, outer sleeve and semiconductor spring have been processed into entirety, spiral shell in factory
Cap need to set cross bore and neck in factory, and built-in circuit, sheet metal and connector are installed in relevant position.Shaped steel is sheared and connected
Fitting and girder or bottom plate etc. need to set the position of shear connector to set stay bolt hole.Preassembling is carried out, detection mounting hole is
No accurate, whether the circuit where semiconductor spring forms loop, and whether resistance is corresponding with pretension.After preassembling is qualified, enter
The quantization production of row product.
Live shaped steel shear connector is rubbed with the girder of shear connector or the stay bolt hole of plate need to be set to align with new
Wiping type high-strength bolt carries out assembled.
Friction type high strength bolt is screwed with special electric wrench, is screwed into nut by design requirement correspondingly sized pre-
Pulling force region, the resistance of semiconductor spring is then measured with ohmmeter, pretension is adjusted until reaching required shearing resistance
Untill bearing capacity and stiffness.
High-strength bolt component includes nut, thread segment, nut, outer sleeve and semiconductor spring, and the bottom surface of nut is provided with
Cross bore, the first sheet metal and the second sheet metal；The top surface of nut is provided with neck, and neck one end is provided with connector；Such as Fig. 7 institutes
Show, weld nut, outer sleeve and semiconductor spring successively to form an entirety during prefabrication, and nut, outer sleeve and half
Conductor spring three is coaxial；Nut is from one end precession of thread segment, and semiconductor spring, outer sleeve and nut are from the another of thread segment
End is inserted in, and semiconductor spring is embedded in the neck of nut top surface and is connected with connector, is spirally connected between nut and thread segment.
In addition, nut and nut all pass through special working process, the sticking effect and ditch dug with a plow effect of metal surface are enhanced,
The roughness of metal surface is the superposition of sticking effect and ditch dug with a plow effect, as shown in figs. 8 a and 8b, both enhances metal surface
Coefficient of friction, make to obtain bigger shear-carrying capacity under identical pretension.
In a further embodiment, there is provided a kind of friction type high strength bolt for monitoring and controlling pretension, including
At least provided with the spiro rod section 302 of one section of threaded portion, the first nut 301 and the second nut 303 being spirally connected with spiro rod section, it is set in
Semiconductor spring 305 (shown in Fig. 6 d) on spiro rod section and between the first nut and the second nut, is socketed in semiconductor bullet
The sleeve 304 of spring periphery, it is arranged on the first nut or the second nut side and the both positive and negative polarity sheet metal that can be connected with ohmmeter
307, and the wire of electrical connection both positive and negative polarity sheet metal and semiconductor both ends of the spring；The side of first nut or the second nut is set
Have for the neck 308 with semiconductor spring end clamping or with the caulking groove for being connected with sleeve one end, the first nut and
When the relative distance of two nuts changes, semiconductor spring is stretched or compressed.It is socketed with the outside of sleeve and/or semiconductor spring
Rubber ring 309 (shown in Figure 12).Screw rod end is longitudinally divided into multiple regions along it, and the color of different zones is different.Friction-type is high-strength
Degree bolt is arranged at round bolt hole, oval bolt hole or stay bolt hole.Cross recess is provided with first nut or the second nut
306, for rotating nuts, the relative distance between adjusting nut.Semiconductor spring has good pliability and elasticity, example
If its extended length is up to former 3.5-4 times of its length.And there are good cold resistance, anti-flammability, oil resistivity and wearability.Can root
Require to produce all kinds of coil type spring lines according to occasion is different.
The power transmission pattern sheared of being resisted using interface friction force described in the present embodiment is real by high-strength bolt component
Existing, Bolt sizes are 8.8 grades of M20 types.High-strength bolt component applies pretension by tightening nut, to thread segment (screw rod),
So that the nut of high-strength bolt component, connector main body and nut step up, shearing is set to be converted into interface friction resistance.It is passed
Force mode is as shown in figure 9, outside shearing is typically caused by the changing of the relative positions between the changing of the relative positions of concrete and shaped steel or plate, this interface shear stress transmission
Shaped steel shear connector is given, the then interface friction force of shaped steel shear connector and beam or plate resistance shearing, this interface friction force
It is to be provided by the controlled pretension of high-strength bolt component.
As shown in Figure 10, the thread segment of high-strength bolt component is provided with different pretension partition identifications, with nut precession
One end start to be sequentially provided with threaded portion 0, threaded portion 1, threaded portion 2, threaded portion 3 and threaded portion 4.Due to spiral shell
Female, outer sleeve and semiconductor spring cause to block to thread segment, therefore are used as index plane using the upper surface of nut.When semiconductor bullet
Spring is embedded in neck, and now semiconductor spring is in the raw；When nut upper end surface is in the interface in region 0 and region 1
Or during region 0, do not clamped between shear connector and beam or plate now, the pretension of bolt is 0kN；When the upper surface point of nut
When threaded portion 1-4, corresponding bolt pretension scope is respectively 0-5kN, 5-10kN, 10-15kN and 15-20kN in other places.
Change pretension and interface friction force in a manner of this control nut rotates to thread segment different subregions, realize shear-carrying capacity
With the preliminary control of rigidity.
As shown in figure 11, when on semiconductor spring build-in to neck, it is formed interior with nut by neck and connector
Circuits, and one end of semiconductor spring is connected by connector with the first or second sheet metal, the other end of semiconductor spring
It is connected by wire with the second or first sheet metal；When nut is rotated down, semiconductor spring is gradually compressed, spring section
Increase, length reduce；When nut rotates up, semiconductor spring is gradually elongated, and spring section reduces, length increase.Cause
This, inevitably results in elongation or compression semiconductor spring, changes the area of section and length of semiconductor spring, according to resistance formulaI.e. resistance changes, and semiconductor spring forms built-in circuit with nut by neck and connector, and passes through nut
The resistance that two sheet metal connection ohmmeters measure resistance, i.e. semiconductor spring between two sheet metals is drawn in bottom surface, obtains
The pretension of bolt, so that observation interface frictional force in real time, realizes the accurate control of pretension and interface friction force.
As shown in Figure 12 and Figure 13, also it can set and match somebody with somebody in the outer sleeve of high-strength bolt component and the outside of semiconductor spring
The rubber ring of set, the rubber ring primarily serve both sides and acted on：(1) friction-type shear connector is because the pretension of tightening latch can
Adjusted in a manner of by screwing installation nut and observation resistance, corresponding frictional force and shear-carrying capacity can also change therewith.
Therefore tightening latch can move between bolt hole, will necessarily extrude hole wall and cause coup injury to hole wall, for protection hole wall and unlimited
The minute movement of lever tumbler, set that rubber ring prevents tightening latch and hole wall when bolt produces small sliding it is direct contacting, avoid
The coup injury of bolt or hole wall.(2) semiconductor spring is protected, semiconductor spring is the core of this high-strength bolt component
Part, by the change of its resistance, realize the monitoring to the pretension and interface friction force of tightening latch, realize shear-carrying capacity and just
Degree can survey and controlled state.Therefore, it is protected to the effect for not only acting as insulation with rubber ring, shearing is also enhanced and connects
The durability of fitting.
Supporting bolt hole can be that circle bolt hole is alternatively stay bolt hole with high-strength bolt component, and it is depended primarily on
Whether the maximum direction of shearing determines.It is more favourable, and stay bolt using stay bolt hole when the maximum direction of known shearing
The direction in hole is identical with shearing maximum direction holding, because the bolt can be real according to actual conditions during structure use
When increase or discharge shearing, corresponding bolt can produce small slip in bolt hole；When the maximum direction of unknown shearing, adopt
It is more reasonably with circle bolt hole.Either bolt hole is still justified in stay bolt hole, is equipped with supporting rubber ring, the rubber ring
Function as described above.
As shown in Figure 14 and Figure 15, be friction-type peg shear connector, it include peg shear connector main body 401,
Nut 402, sleeve 403, fixing nut 404 and semiconductor spring 405 are installed, wherein, peg shear connector main body from it is lower toward
On include thread segment 4001, non-threaded extruded segment 4002 and resistance to plucking pier nose 4003 successively.The upper end surface of fixing nut is in screw thread
The top of section is simultaneously welded with peg shear connector main body, and the upper end of sleeve and the lower surface of fixing nut are welded,
The lower end of semiconductor spring and sleeve is welded, installs nut from the precession of thread segment bottom.
In use, rubber corresponding to first being installed in the relevant position bolt hole for needing to install friction-type peg shear connector
Rubber ring, peg shear connector is then passed through into rubber ring and fixation, installation nut is screwed from the other end, when installation nut driving
To after to a certain degree, by the free end of semiconductor spring be embedded in installation nut top surface neck 4004 in, and with connector phase
Even, ensure that the place circuit of semiconductor spring can form path.Then installation nut is tightened, and with ohmmeter with installing nut bottom
The sheet metal 4005 in face is connected, and shear-carrying capacity and the rigidity state monitored with control are realized by resistance value.
Cut in addition, the peg shear connector main body in friction-type peg shear connector can be the peg without " pier nose "
Power connector main body, it includes thread segment and non-threaded extruded segment.Other structures and annexation and the above-mentioned bolt for having pier nose
It is identical to follow closely shear connector main body.The friction-type peg shear connector can realize the effect of " shearing resistance " not " resistance to plucking ", its
Lack build-in and occlusion in concrete, therefore shearing resistance effect is only provided, steel and concrete are fast suitable for assembled combined member
The installation and removal of speed.
Peg shear connector and high-strength bolt component are combined by the friction-type peg shear connector, now, bolt
Nail shear connector is no longer rely on weld seam and is connected with plate, but makes nut, nut using the principle of friction type high strength bolt
With plate clamp caused by frictional force resistance shear.The power transmission pattern of traditional peg shear connector is which improved, rationally profit
With interface friction force, and high-strength bolt component is redesigned, make its pretension can monitored and control.
For supporting bolt hole using circle bolt hole, this is to make use of its shearing resistance effect each with friction-type peg shear connector
To it is identical the characteristics of, in particular for the shearing of unknown direction, circle bolt is most rational set-up mode.In circle bolt hole and cut
Between power connector, supporting rubber ring is also provided with, the effect of the rubber ring is same as previously described.
The construction method of friction-type shaped steel shear connector, comprises the following steps：
(1) prefabrication is carried out to the friction-type shaped steel shear connector
Size, shearing resistance effect according to needed for job site and the target to reach, process the friction-type shaped steel and cut
Power connector.
(11) component manufactures and designs
The relevant position that need to set the girder of shear connector is punched according to design requirement, the size according to needed for scene
The individual component of shaped steel shear connector is manufactured and processed with the requirement of shearing resistance effect design, is carried according to the shearing resistance reached in advance
Power, rigidity and performance are designed to the pretension of high-strength bolt component, then according to prefabrication flow chart to high intensity
Bolt assembly produces with connector main body sample；
(12) component preassembling
Preassembling should be carried out to component, nut, outer sleeve and semiconductor spring are sequentially coaxially set and led to before dispatching from the factory
Cross welding manner and form entirety, adjust bore size and deformation, the logical closed state of circuit where detection semiconductor spring, measurement half
Whether the resistance of conductor spring and the subregion where nut and pretension are corresponding；After preassembling is qualified, the quantization life of product is carried out
Production.
(2) the assembled friction-type shaped steel shear connector in job site sets the friction-type shaped steel shearing to connect with needing
The girder or plate of fitting.
(21) connector main body is alignd with the stay bolt hole of beam or plate, assembly, shaped steel is carried out with high-strength bolt component
The edge of a wing of shear connector can prevent starting for concrete, the boundary formed by high-strength bolt component the clamping force plate
Face frictional force shearing resistance.
(22) in installation process, the nut of high-strength bolt component is screwed with spanner, is screwed into nut by design requirement
Correspondingly sized pretension region, then with ohmmeter measure semiconductor spring resistance, pretension is adjusted until up to
Untill required shear-carrying capacity and rigidity.
(3) pretension of high-strength bolt is adjusted during use in real time according to the state of combined member
In a word, in use, the top of beam or plate has all been poured in concrete, and only nut is exposed to outside, this
When can change the tightness of bolt by the cross bore of nut, control the pretension of bolt, thus discharge the bad of concrete
Internal force improves the consequence for causing shear behavior to reduce due to bolt looseness, realizes the theory of " anti-to put combination ".It is of the present invention
Shaped steel shear connector direction it is vertical with known shear direction, enhance shear-carrying capacity and rigidity, its edge of a wing side is stung
Being separated together in concrete, effectively prevent concrete with starting for girder steel, reducing traditional peg shear connector and pier is set
The workload of head.Because the shearing resistance of shaped steel shear connector, anti-bending bearing capacity and rigidity are all very big, and stay bolt hole 3 makes bolt
It is not directly contacted with hole wall, solves fatigue problem, avoids material damage.
Claims (10)
- A kind of 1. friction-type shaped steel shear connector, it is characterised in that：Including shear connector main body and high-strength bolt component, The shear connector main body is channel-section steel, and some bolts hole are provided with the edge of a wing of channel-section steel；High-strength bolt component is included at least The spiro rod section of one section of threaded portion is provided with, the first nut and the second nut being spirally connected with the spiro rod section, is set on spiro rod section And the semiconductor spring between the first nut and the second nut, the sleeve of semiconductor spring periphery is socketed in, is arranged on One nut or the second nut side and the both positive and negative polarity sheet metal that can be connected with ohmmeter, and electrical connection both positive and negative polarity sheet metal and half The wire of conductor both ends of the spring；The side of first nut or the second nut is provided with for the neck with semiconductor spring end clamping or with being used for and covering When the relative distance of the caulking groove of cylinder one end connection, the first nut and the second nut changes, semiconductor spring is stretched or compressed.
- 2. friction-type shaped steel shear connector as claimed in claim 1, it is characterised in that sleeve and/or the semiconductor bullet Rubber ring is socketed with the outside of spring.
- 3. friction-type shaped steel shear connector as claimed in claim 1, it is characterised in that the screw rod end is longitudinally divided into along it Multiple regions, the color of different zones are different.
- A kind of 4. friction-type shaped steel shear connector, it is characterised in that：Including shear connector main body and high-strength bolt component, The shear connector main body is channel-section steel, and one of edge of a wing side is provided with what several coordinated with the high-strength bolt component Bolt hole, the connector main body are connected by high-strength bolt component with girder.
- A kind of 5. friction-type shaped steel shear connector according to claim 4, it is characterised in that：The high-strength bolt group Part includes nut, thread segment, nut, outer sleeve and semiconductor spring, and the top surface of the nut is provided with neck；Will during prefabrication Nut, outer sleeve and semiconductor spring are in turn connected to form an entirety, and nut, outer sleeve and semiconductor by predetermined manner Spring three is coaxial；Nut is from one end precession of thread segment, the other end set of semiconductor spring, outer sleeve and nut from thread segment Enter, the neck of semiconductor spring and nut top surface is connected together, and is spirally connected between nut and thread segment；The thread segment is provided with different pretension partition identifications, with one end of nut precession start to be sequentially provided with threaded portion 0, Threaded portion 1, threaded portion 2, threaded portion 3 and threaded portion 4；Using the upper surface of nut as index plane, when semiconductor bullet Spring is embedded in neck, and now semiconductor spring is in the raw；When nut upper end surface is in threaded portion 0 and threaded portion 1 Interface or threaded portion 0 when, do not clamped between shear connector and beam or plate now, the pretension of bolt is 0kN；Work as spiral shell When female upper surface is respectively at threaded portion 1 to threaded portion 4, corresponding bolt pretension scope is respectively 0-5kN, 5- 10kN, 10-15kN and 15-20kN, rotating nuts change subregion of the nut upper surface in thread segment, to change pretension and interface Frictional force, realize the preliminary control of shear-carrying capacity and rigidity.
- A kind of 6. friction-type shaped steel shear connector according to claim 5, it is characterised in that：The bottom surface of the nut is set There are cross bore, the first sheet metal and the second sheet metal, neck one end of nut top surface is provided with connector；When semiconductor spring engages When on to neck, it forms built-in circuit with nut by neck and connector, and one end of semiconductor spring passes through connector It is connected with the first or second sheet metal, the other end of semiconductor spring is connected by wire with the second or first sheet metal；Pass through Ohmmeter can measure the resistance value of the resistance between the first sheet metal and the second sheet metal, i.e. semiconductor spring, further To the pretension of the high-strength bolt component, then change nut tightness adjusting degree according to resistance and realize shear-carrying capacity and rigidity Accurate control.
- A kind of 7. friction-type shaped steel shear connector according to claim 4, it is characterised in that：The friction-type shearing connects Fitting also includes the rubber ring being arranged between high-strength bolt component and girder screwed hole.
- A kind of 8. friction-type shaped steel shear connector according to claim 4, it is characterised in that：With the high-strength bolt The bolt hole that component coordinates is stay bolt hole or circle bolt hole.
- A kind of 9. friction-type shaped steel shear connector according to claim 4, it is characterised in that：The connector main body is Q345 hot-rolled steel sections, the thread segment are 8.8 grades of M20 type bolts, and the girder for being used to install the shear connector is H profile steel Girder.
- 10. a kind of construction method of friction-type shaped steel shear connector, it is characterised in that the friction-type shaped steel used in this method is cut Power connector is the friction-type shaped steel shear connector described in any one of claim 1 to 9, and the construction method includes following step Suddenly：(1) prefabrication is carried out to the friction-type shaped steel shear connectorSize, shearing resistance effect according to needed for job site and the target to reach, process the friction-type shaped steel shearing and connect Fitting；(2) the assembled friction-type shaped steel shear connector in job site is with needing to set the friction-type shaped steel shear connector Girder or plate；(3) pretension of high-strength bolt is adjusted during use in real time according to the state of combined member；The step (1) includes：(11) component manufactures and designsThe relevant position that need to set the girder of shear connector is punched according to design requirement, the size and anti-according to needed for scene Cut effect design requirement the individual component of shaped steel shear connector is manufactured and processed, according to the shear-carrying capacity reached in advance, Rigidity and performance are designed to the pretension of high-strength bolt component, then according to prefabrication flow chart to high-strength bolt Component produces with connector main body sample；(12) component preassemblingPreassembling should be carried out to component, nut, outer sleeve and semiconductor spring are sequentially coaxially set and pass through weldering before dispatching from the factory The mode of connecing forms entirety, adjusts bore size and deformation, the logical closed state of circuit, measures semiconductor where detection semiconductor spring Whether the resistance of spring and the subregion where nut and pretension are corresponding；After preassembling is qualified, the quantization production of product is carried out；The step (2) includes：(21) connector main body is alignd with the stay bolt hole of beam or plate, assembly, shaped steel shearing is carried out with high-strength bolt component The edge of a wing of connector can prevent starting for concrete, and the interface formed by high-strength bolt component the clamping force plate is rubbed Wiping, which is resisted strenuously, cuts；(22) in installation process, the nut of high-strength bolt component is screwed with spanner, is screwed into nut accordingly by design requirement The pretension region of size, the resistance of semiconductor spring is then measured with ohmmeter, pretension is adjusted until reaching Untill the shear-carrying capacity and rigidity that need；The step (3) is specially：In use, the top of beam or plate has all been poured in concrete, and only nut is exposed to outside, now passes through nut Cross bore change the tightness of bolt, control the pretension of bolt, thus discharge the bad internal force of concrete or improve by The consequence of shear behavior reduction is caused in bolt looseness.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331254A (en) * | 2018-03-04 | 2018-07-27 | 天津大学 | Using unilateral bolt double steel plate composite structure |
| CN109898908A (en) * | 2019-01-04 | 2019-06-18 | 西安理工大学 | A kind of quick assembling is bolted semi-rigid folded plate type shear connector entirely |
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| CN201649303U (en) * | 2010-02-01 | 2010-11-24 | 昆明理工大学 | Shear connector |
| CN103572839A (en) * | 2013-11-05 | 2014-02-12 | 南京工业大学 | Mixed shear connector |
| CN103866864A (en) * | 2014-03-12 | 2014-06-18 | 南京工业大学 | Bolt shear force connecting piece and method for enhancing shear strength by use of spring |
| KR20160131558A (en) * | 2015-05-08 | 2016-11-16 | 인천대학교 산학협력단 | Post-installed concrete anchor with shear reinforcement |
| CN106948488A (en) * | 2017-05-05 | 2017-07-14 | 长沙理工大学 | Preparation method, combination beam and the monitoring device of compound transfer structure for SRC beams |
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- 2017-09-06 CN CN201710797526.0A patent/CN107558615B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201649303U (en) * | 2010-02-01 | 2010-11-24 | 昆明理工大学 | Shear connector |
| CN103572839A (en) * | 2013-11-05 | 2014-02-12 | 南京工业大学 | Mixed shear connector |
| CN103866864A (en) * | 2014-03-12 | 2014-06-18 | 南京工业大学 | Bolt shear force connecting piece and method for enhancing shear strength by use of spring |
| KR20160131558A (en) * | 2015-05-08 | 2016-11-16 | 인천대학교 산학협력단 | Post-installed concrete anchor with shear reinforcement |
| CN106948488A (en) * | 2017-05-05 | 2017-07-14 | 长沙理工大学 | Preparation method, combination beam and the monitoring device of compound transfer structure for SRC beams |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331254A (en) * | 2018-03-04 | 2018-07-27 | 天津大学 | Using unilateral bolt double steel plate composite structure |
| CN109898908A (en) * | 2019-01-04 | 2019-06-18 | 西安理工大学 | A kind of quick assembling is bolted semi-rigid folded plate type shear connector entirely |
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| Publication number | Publication date |
|---|---|
| CN107558615B (en) | 2020-05-22 |
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