CN109781512A - Welded steel fabric and muscle solder joint shearing resistance experimental rig and its method - Google Patents
Welded steel fabric and muscle solder joint shearing resistance experimental rig and its method Download PDFInfo
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- CN109781512A CN109781512A CN201910235251.0A CN201910235251A CN109781512A CN 109781512 A CN109781512 A CN 109781512A CN 201910235251 A CN201910235251 A CN 201910235251A CN 109781512 A CN109781512 A CN 109781512A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 158
- 239000010959 steel Substances 0.000 title claims abstract description 158
- 238000010008 shearing Methods 0.000 title claims abstract description 127
- 210000003205 muscle Anatomy 0.000 title claims abstract description 76
- 229910000679 solder Inorganic materials 0.000 title claims abstract description 57
- 239000004744 fabric Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 94
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 26
- 238000003032 molecular docking Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a kind of welded steel fabric and muscle solder joint shearing resistance experimental rig and its methods, steel hook including the transverse steel for shelving shearing resistance sample, the upper grip of the shearing resistance force tester for clamping the top that steel is linked up with and the lower collet of two vertical reinforcement bottom ends arranged side by side for clamping shearing resistance sample, there is the first level of accommodating vertical reinforcement to U-shaped notch at the coupler body of steel hook accommodating transverse steel, the clamping part and body part of steel hook are hinged；Hook is shelved at the coupler body of transverse steel as recessed arcwall face, the arc shaped slider to match with arcwall face is sliding combined on arcwall face, the top surface of arc shaped slider is the arc groove for shelving transverse steel, there is the second horizontal direction U-shaped notch of accommodating and muscle on arc shaped slider.Welded steel fabric and the test of muscle solder joint shearing resistance are carried out using the device, neither damage solder joint again can be to vertical applied force reinforcing bar and muscle detects, the accuracy height of testing result.
Description
Technical field
The present invention relates to reinforcing bar solder joint shearing resistance experimental technique fields in welded steel fabric processing, are especially a kind of reinforcing bar
Welded mesh and muscle solder joint shearing resistance experimental rig and its method.
Background technique
In architectural engineering steel bar meter technology, by with identical or different diameter vertical reinforcement or longitudinal reinforcement and
Length and the spacing vertical arrangement to be pre-designed, whole crosspoints are set with the processing of special reinforced welded mesh transverse steel respectively
The plane reticular reinforcing bar that resistance spot welding in standby welds together, referred to as welded steel fabric.In general, transverse steel be it is non-by
Power reinforcing bar, generally one is i.e. single, and vertical reinforcement be steel bar stress, it is traditional be it is single, in recent years occur two side by side
Vertical reinforcement, referred to as and muscle.
According to standard GB/T/T1499.3 " concrete reinforcement steel " third portion and professional standard JGJ114-2014
" welded steel fabric concrete structure technique regulation " regulation, welded steel fabric finished product have to pass through the shearing resistance examination for intersecting solder joint
It tests, meets the requirements, could normally come into operation.
The welded steel fabric solder joint shearing resistance test of the prior art is usually to cut out cross from finished product welded steel fabric
Transverse steel in cross shearing resistance sample is shelved on welded steel fabric solder joint shearing resistance experimental rig by shape shearing resistance sample
On, i.e., the transverse steel in cross shearing resistance sample is shelved on the steel hook of the experimental rig, which links up with hook
Firmly there is the horizontal direction U-shaped notch of an accommodating vertical reinforcement at the coupler body of transverse steel, the upper end that steel links up with straight-bar is used for quilt
It is clamped in the upper grip of shearing resistance force tester of the prior art, the lower end of the vertical reinforcement in cross shearing resistance sample is used for
It is clamped in the lower collet of the shearing resistance force tester of the prior art.Start testing machine, the downward straight line fortune of the lower collet of testing machine
It is dynamic to pull, by the blocking of transverse steel, make at solder joint by shearing action.When shearing is greater than or equal to 0.3 times of tension
When yield force as defined in vertical reinforcement can be regarded as shearing resistance force value, so that it may determine that the cross shearing resistance sample is qualified, it is described
Yield force as defined in the tension vertical reinforcement is yield strength as defined in reinforcing bar and its sectional area product.
But practice in, the welded steel fabric solder joint shearing resistance experimental rig of the above prior art be only applicable to it is single vertically by
Power reinforcing bar, and welded steel fabric two vertical reinforcements arranged side by side i.e. simultaneously muscle solder joint shearing resistance test can not be applied to.It is existing main
Problem is: 1, it according to above national standard and professional standard is provided, it is vertical side by side by two when to simultaneously muscle progress shearing resistance test
One in reinforcing bar is truncated at solder joint, but will be not damage solder joint as condition, but in practical operation, and conditions above is difficult full
Another vertical reinforcement will be truncated in foot at solder joint, what means no matter used, damage solder joint is all unavoidable, and is wanted
Accomplish not damage solder joint, with a certain distance from off-position will have from solder joint, i.e. the residual muscle of root truncation interferes transverse steel
Two fulcrums draw close the vertical reinforcement that need to be detected, but this violates the spacing Ying Jinke in the above standard about transverse steel fulcrum again
The small regulation of energy, that is, it is pulled through in journey in single vertical reinforcement, transverse steel may generate big bending deformation and shake,
Directly affect the accuracy of shearing resistance test.2, by the regulation of the above professional standard, test result will meet shearing resistance V≤0.3
Force value is surrendered as defined in times tension reinforcement, as soon as but whens above prior art actual tests there was only a vertical reinforcement, yield force
An only area of section is multiplied by regulation yield strength, it is clear that is not the shearing resistance force data of simultaneously muscle, even if it may be speculated that practical weldering
The area of the shearing resistance undertaken at point will also include area of another vertical reinforcement being truncated at solder joint, that is, two simultaneously
The spot area of column vertical reinforcement should be greater than the spot area of a vertical reinforcement, but speculate it is not test itself, examination after all
The accuracy for testing result is undoubtedly under suspicion.3, the lower collet of existing testing machine can only clamp single vertical applied force reinforcing bar, and nothing
Method clamps and muscle, and it is even more impossible to exert a force to simultaneously muscle.4, the welded steel fabric solder joint shearing resistance experimental rig of the prior art stretches single
Vertical reinforcement can make the axis of upper and lower collet on same plumb line substantially, if but stretch simultaneously muscle, it not can guarantee upper grip
Axis with and muscle middle line on same plumb line, to influence the accuracy of shearing resistance test result.5, the steel of the prior art
Muscle welded mesh solder joint shearing resistance experimental rig easily generates the accuracy for interfering and influencing shearing resistance test result to simultaneously muscle.
Summary of the invention
The invention solves a technical problem be to provide a kind of solder joint for neither damaging shearing resistance sample again can be to simultaneously
The welded steel fabric and muscle solder joint shearing resistance experimental rig that column vertical reinforcement is detected.
A technical solution of the invention is to provide a kind of welded steel fabric and muscle solder joint shearing resistance experimental rig,
The shearing resistance test of steel hook including the transverse steel for shelving shearing resistance sample, the top for clamping steel hook
The lower collet of the upper grip of machine and the vertical reinforcement bottom end for clamping shearing resistance sample, the hook of steel hook accommodating transverse steel
There is the first level of accommodating vertical reinforcement to U-shaped notch at body, the steel hook is divided into clamping part and body part, clamps
Portion is hinged with body part；Lower collet is the collet that can clamp two vertical reinforcements arranged side by side of shearing resistance sample.
After using the above structure, simultaneously muscle solder joint shearing resistance experimental rig has the advantage that down welded steel fabric of the present invention
Collet can clamp two vertical reinforcements arranged side by side, and experimental provision can effectively exert a force to simultaneously muscle, and clamping part is hinged with body part
Both be adjustable relative position to guarantee the axis of clamping part with and muscle middle line on same plumb line, shearing resistance sample
Vertical reinforcement is two vertical reinforcements arranged side by side, the process for eliminating difficult truncation and a vertical applied force reinforcing bar in muscle, examination
Sample more meets welded steel fabric actual working state and working condition, and the experimental rig is highly reliable to simultaneously muscle sample experiment,
The accuracy that welded steel fabric and muscle solder joint shearing resistance are tested increases substantially, i.e. the accuracy of measurement result increases substantially.
Further, width of the first level to the width of U-shaped notch greater than two vertical reinforcements arranged side by side, preferably first
The width dimensions of horizontal direction U-shaped gap width size vertical reinforcement more arranged side by side than two accommodated are 0.2~0.6mm big.Using
After the above structure, steel hook is avoided to generate interference, welded steel fabric and the examination of muscle solder joint shearing resistance to two vertical reinforcements arranged side by side
The accuracy tested further increases, i.e. the accuracy of measurement result further increases.
Further, two of shearing resistance sample vertical reinforcements arranged side by side are located at first level to the inside of U-shaped notch, resist
The transverse steel of shearing sample is located at the outside of two vertical reinforcements arranged side by side.After using the above structure, guaranteeing steel hook
For the middle line of the axis on top and two vertical reinforcements arranged side by side under the precondition on same vertical line, steel links up with the power at coupler body
Performance is more preferable, and the reliability of work is stronger, and the accuracy of experimental result is higher.
Further, it is recessed arcwall face at the coupler body of transverse steel that the steel hook, which is shelved, is slided on arcwall face
It is combined with the arc shaped slider to match with arcwall face, the top surface of arc shaped slider is the arc groove for shelving transverse steel, arc shaped slider
On have accommodating two vertical reinforcements arranged side by side the second horizontal direction U-shaped notch.After using the above structure, both made transverse steel opposite
Steel link up with front-rear direction position it is adjustable, and can effectively avoid arc shaped slider to two vertical reinforcements arranged side by side i.e. simultaneously muscle interference,
The middle line of the axis and two vertical reinforcements arranged side by side that better ensure that steel hook upper end is further ensured that on same plumb line
And the accuracy of muscle solder joint shearing resistance test measurement result.
Further, the width of the second horizontal direction U-shaped notch is greater than width of the first level to U-shaped notch.Using
After the above structure, interference of the arc shaped slider to simultaneously muscle can be more effectively avoided.It further ensures and muscle solder joint shearing resistance is tested
The accuracy of measurement result.
Further, the top of the clamping part is cylinder, and lower part and the one in body part top of clamping part are flat
Block, there is the vertical U-shaped notch for flat piece of activity insertion in another one, on the flat piece of two sidewalls with vertical U-shaped notch
There is mutual corresponding hinge hole, the transverse steel of hinged shaft and shearing resistance sample in hinge hole is arranged in parallel.Using the above structure
Afterwards, it can be rotated before and after the hinge shaft axis at the coupler body of steel hook accommodating transverse steel, so that the axis of upper grip and two are simultaneously
The middle line of column vertical reinforcement remains on same plumb line, further improves two vertical reinforcements arranged side by side i.e. and muscle solder joint
The accuracy of shearing resistance test measurement result.
Further, the structure of the lower collet are as follows: respectively removable on two Gripper bodies of left and right to be connected with first left half
Fixture block and the first right half fixture block, the first left half fixture block respectively have shape vertical side by side with two with the place of docking of the first right half fixture block
Two semicircle orifices that the respective radius shape of reinforcing bar matches, the first left half fixture block and the first right side half fixture block holding two are vertical side by side
There are the first gaps at docking after reinforcing bar.After using the above structure, lower collet can be reliably clamped and muscle, and effectively to simultaneously
Muscle force, and multiple diameter difference such as 10mm, 12mm and muscle can be pressed from both sides with a collet.
Further, the structure of the upper grip are as follows: respectively removable on two Gripper bodies of left and right to be connected with second left half
Fixture block and the second right half fixture block, the second left half fixture block respectively have shape and cylindrical radius shape with the place of docking of the second right half fixture block
The semicircle orifice to match, there are the second gaps with the place of docking after the second right half fixture block holding cylinder for the second left half fixture block.It adopts
After the above structure, upper grip can be reliably clamped the upper end such as cylinder of steel hook, and can more preferably guarantee the axis of cylinder
Middle line with two vertical reinforcements arranged side by side is on same plumb line.
The invention solves another technical problem be to provide it is a kind of using described in one technical solution of any of the above
Device to welded steel fabric and muscle solder joint shearing resistance test method, neither damaged using this method solder joint not only can to but also can be to simultaneously
Column vertical reinforcement is detected.
Another technical solution of the invention is to provide a kind of using dress described in one technical solution of any of the above
Set the method to welded steel fabric and the test of muscle solder joint shearing resistance, comprising the following steps:
1., interception includes that the cross of a transverse steel and two vertical reinforcements arranged side by side resists from finished product welded steel fabric
Shear sample；
2., the transverse steel of shearing resistance sample is shelved on steel hook, two vertical reinforcement lower parts arranged side by side extend to
First level is to below U-shaped notch；
3., with the upper grip of shearing resistance force tester steel hook upper end is clamped, will with the lower collet of shearing resistance force tester
The vertical reinforcement bottom end arranged side by side of two of shearing resistance sample clamps；
4., starting testing machine, the downward pulled straight of lower collet of testing machine made shearing resistance by the blocking of transverse steel
Transverse steel in sample and at the solder joint of two vertical reinforcements arranged side by side by shearing action, and read the shear value of display；
5., be calculated using the following equation out the theoretical shear value of the sample: V >=2 × 0.3fykAs, wherein fyk is reinforcing bar
Yield strength standard value, As are the area of section of a reinforcing bar；Theoretical shear value and the testing machine institute of the sample will be calculated again
It reads shear value to compare, the read shear value of testing machine is greater than or equal to theoretical shear value, determines that the cross shearing resistance sample closes
Lattice, the read shear value of testing machine are less than theoretical shear value, determine that the cross shearing resistance sample is unqualified.
After above step, the method for the present invention establishes and the new method of discrimination of muscle shearing resistance, proposes new calculating
Formula, and can effectively be exerted a force to simultaneously muscle using experimental rig, the clamping part of steel hook and the hinged connection of body part
Mode be adjustable relative position to guarantee the axis of clamping part with and muscle middle line on same plumb line, shearing resistance sample
Vertical reinforcement is two side by side, and the process for eliminating difficult truncation and a vertical applied force reinforcing bar in muscle, sample more accords with
Welded steel fabric actual working state and working condition are closed, using the device to highly reliable, the steel bar welding of simultaneously muscle sample experiment
The accuracy for connecing net and the test of muscle solder joint shearing resistance increases substantially, i.e. the accuracy of measurement result increases substantially.
Further,
Step 2. in, the transverse steel of shearing resistance sample is shelved in the arc groove of arc shaped slider, two side by side
Vertical reinforcement is in inside, and on the outside, two vertical reinforcements arranged side by side are passed down through the second horizontal direction U-shaped notch and to transverse steel
One horizontal direction U-shaped notch and lower part extend to first level to below U-shaped notch；
Step 3. in, clamped with the cylinder that the upper grip of shearing resistance force tester links up with steel.
After above step, both due to the adjustment effect of hinged shaft and arc shaped slider, link up with transverse steel with respect to steel
Front-rear direction position is adjustable, and effectively avoids arc shaped slider that from capable of better ensuring that the axis of the cylinder of clamping part to the interference of simultaneously muscle
The middle line of line and two vertical reinforcements arranged side by side further ensures on same plumb line and the test measurement of muscle solder joint shearing resistance is tied
The accuracy of fruit.
Detailed description of the invention
Fig. 1 is the cross shearing resistance sample being detected in welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig
Structural schematic diagram.
Fig. 2 is the positive sectional structure signal of welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig part-structure
Figure.
Fig. 3 is the junction left view structural representation of the clamping part that steel is linked up in the present invention and body part.
Fig. 4 is the schematic cross-sectional view of bowing for the coupler body that steel is linked up in the present invention
Fig. 5 is that upper grip in welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig is bowed sectional structure signal
Figure.
Fig. 6 is that the lower collet in welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig faces upward sectional structure signal
Figure.
As shown in the figure 1, shearing resistance sample, 2, transverse steel, 3, two vertical reinforcements arranged side by side, 4 and muscle middle line, 5, on
Collet, 6, clamping part, 7, hinged shaft, 8, steel hook, 9, body part, 10, arc shaped slider, 11, lower collet, 12, vertical U-shaped lack
Mouthful, 13, cylinder, 14, flat piece, 15, first level to U-shaped notch, the 16, second horizontal direction U-shaped notch, 17, first is left
Half fixture block, the 18, first right half fixture block, 19, two semicircle orifices, the 20, first gap, the 21, second left half fixture block, 22, second right half
Fixture block, 23, semicircle orifices, the 24, second gap.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.Herein it is to be understood that, for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
Each embodiment of the invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
As shown in Figure 2, Figure 3, Figure 4
Welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig, including the transverse direction for shelving shearing resistance sample 1
Reinforcing bar 2 steel hook 8, for clamp steel hook 8 top shearing resistance force tester upper grip 5 and for clamping shearing resistance
The lower collet 11 of the vertical reinforcement bottom end of power sample 1, steel, which is linked up with, accommodating vertical reinforcement at the coupler body that 8 accommodate transverse steels
First level is to U-shaped notch 15.Certainly, simultaneously muscle solder joint shearing resistance experimental rig further includes driving lower collet 11 to welded steel fabric
Make the driving device such as cylinder that straight line pulls movement.The experimental rig is alternatively referred to as experimental provision or detection device.
The collet body of the upper grip 5 generally uses left and right two halves wedge structure, or is pyramidal structure, it is upper it is big under
It is small, it is generally used cooperatively with same up big and down small wedge-shaped sleeve or taper sheath, when drop-down the more draws the more tight.And fixture block generally with a left side
The left and right two halves fixture block that the collet body of right two halves wedge structure is flexibly connected.The flexible connection such as left and right two halves wedge structure
Collet body on the inside of have lateral dovetail groove, have the swallow-tail form with dovetail groove grafting on the outside of the two halves fixture block of left and right
Sliding block.
The collet body of the lower collet 11 generally also uses left and right two halves wedge structure, or is pyramidal structure, lower big
It is upper small, it is generally used cooperatively with same up big and down small wedge-shaped sleeve or taper sheath, when drop-down the more draws the more tight.And fixture block generally with
The left and right two halves fixture block that the collet body of left and right two halves wedge structure is flexibly connected.The flexible connection such as left and right two halves wedge shape knot
There is lateral dovetail groove on the inside of the collet body of structure, there is the dovetail with dovetail groove grafting on the outside of the two halves fixture block of left and right
Shape sliding block.
The above structure is same as the prior art.The inventive point of welded steel fabric of the present invention and muscle solder joint shearing resistance experimental rig
It is:
As shown in Figure 1, detected shearing resistance sample 1 is cross by cutting, vertical reinforcement is two vertical steels arranged side by side
Muscle 3, wherein the length of the vertical reinforcement arranged side by side of two of 2 or more transverse steel can be shorter than the length of the transverse steel 2, wherein laterally
The length of reinforcing bar 2 below two vertical reinforcements arranged side by side can be longer than the length of the transverse steel 2, in favor of the clamping of lower collet 11.
The diameter of the vertical reinforcement 3 arranged side by side of described two is generally identical.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6
The steel links up with 8 points as the clamping part 6 and remaining body part 9 on top, and the top of the clamping part 6 is circle
Column 13.Clamping part 6 and body part 9 are hingedly articulated and connected.One is flat piece in 9 top of lower part and body part of clamping part 6,
There is the vertical U-shaped notch for flat piece of activity insertion in another one, has phase on the flat piece of two sidewalls with vertical U-shaped notch
Mutual corresponding hinge hole, hinged shaft 7 and the transverse steel 2 of shearing resistance sample 1 in hinge hole are arranged in parallel.Under clamping part 6
Portion is the downward vertical U-shaped notch 12 of notch, is flat piece 14 at the top of body part 9, the vertical U-shaped of flat piece 14 activity insertion
In v notch v 12, hinged shaft 7 on two walls of vertical U-shaped notch 12 hinge hole and flat piece of hinge hole is movable matches
It closes, external screw thread can be set on the both ends of the stretching hinge hole of hinged shaft 7, the both ends of hinged shaft 7 are locked by nut.Certainly, two can not also be set
The nut at end can be interference fitted between the hinge hole and hinged shaft 7 on two walls of the vertical U-shaped notch 12 of clamping part 6 i.e. opposite
It is fixed, and hinged shaft 7 and flat piece 14 of hinge hole can be activity cooperation.I.e. flat piece 14 can rotate relative to hinged shaft 7.Hingedly
Hinged shaft 7 and the transverse steel 2 of shearing resistance sample 1 in hole are arranged in parallel, that is, the hanger bulk 8 for being shelved with shearing resistance sample 1 can
It is rotated around hinged shaft 7 so that the middle line of two vertical reinforcements arranged side by side is that simultaneously the middle line 4 of muscle and the axis of cylinder 13 remain at together
On one perpendicular, to guarantee the accuracy of testing result.
Certainly, flat piece at the top of the vertical U-shaped notch with body part 9 of 6 lower part of clamping part is interchangeable.Such as body part top
Portion is the upward vertical U-shaped notch of notch, and the lower part of clamping part is flat piece, and vertical U-shaped notch is inserted into flat piece of activity
It is interior, external screw thread can be set on the both ends of hinged shaft stretching hinge hole, the both ends of hinged shaft are locked by nut.I.e. flat piece can be with respect to hinged shaft
Rotation.Certainly, the nut at both ends can not also be set, two hinge holes on two walls of the vertical U-shaped notch at the top of body part can
I.e. relatively fixed, hinge hole and flat piece of hinge on two walls of hinged shaft and vertical U-shaped notch are interference fitted between hinged shaft
Connect the movable cooperation in hole, and hinged shaft and flat piece of hinge hole can be activity cooperation, certainly, can also hinged shaft with flat piece
Hole interference fit is i.e. relatively fixed, and hinged shaft and two hinge hole activities cooperation on two walls of vertical U-shaped notch are i.e. opposite
Rotation.
The lower collet 11 is the collet that can clamp two vertical reinforcements 3 arranged side by side of shearing resistance sample 1.
The structure of the lower collet is preferred are as follows: respectively removable on two Gripper bodies of left and right to be connected with the first left half fixture block 17
With the first right half fixture block 18, the removable connection such as above-mentioned lateral dovetail slide block and dovetail groove activity grafting.First left half
Fixture block 17 respectively has shape and the respective radius shape of two vertical reinforcements 3 arranged side by side to match with the place of docking of the first right half fixture block 18
Two semicircle orifices 19, the first left half fixture block 17 docks place with after first two vertical reinforcements 3 arranged side by side of right half fixture block 18 holding
There are the first gaps 20.Two semicircle orifices 19 can be regarded as two tangent semi circular surfaces, if folder diameter is 10mm and two kinds of 12mm
Specification and muscle, the radius shape size of each semicircle and 12mm reinforcing bar can be made to match, in this way, the reinforcing bar for being 12mm for diameter
It is general for the reinforcing bar of 10mm with diameter, because first left side, half fixture block 17 and the first right half fixture block 17 hold two vertical steels arranged side by side tightly
There are the first gaps 20 at docking after muscle 3, can there are the gaps 6~10mm between the end face such as clamped two.
The structure of the lower collet can be with are as follows: left Gripper body and right Gripper body do not set half fixture block but on the body
Docking at be directly provided with two semicircle orifices for respectively thering is the respective radius shape of shape and two vertical reinforcements arranged side by side to match, a left side
There are gaps with the place of docking after right Gripper body two vertical reinforcements arranged side by side of holding for Gripper body.
Respective the two of above-mentioned first left side, half fixture block 17 and the first right half fixture block 18, left Gripper body and right Gripper body
Can set up defences sliding asperities in a semicircle orifice.
The structure of the lower collet can be with are as follows: first left side, half fixture block 17 and the first right half fixture block 18 or left Gripper body and
It can respectively be directly provided with anti-skidding asperities on interface at the docking of right Gripper body, i.e., do not set two semicircle orifices and direct
Two vertical reinforcements arranged side by side are embraced with anti-skidding asperities.Certainly the preferably above first embodiment for setting two semicircle orifices.
The structure of the upper grip is preferred are as follows: respectively removable on two Gripper bodies of left and right to be connected with the second left half fixture block 21
With the second right half fixture block 22, the second left half fixture block 21 respectively has shape and cylindrical radius shape with the place of docking of the second right half fixture block 22
The semicircle orifice 23 that shape matches, there are the with the place of docking after the second right half fixture block 22 holding cylinder 13 for the second left half fixture block 21
Two gaps 24.It can there are the gaps 6~10mm between the end face such as clamped two.
The structure of the upper grip can be with are as follows: left Gripper body and right Gripper body do not set half fixture block but on the body
Docking at be directly provided with a semicircle orifice for respectively thering is the respective radius shape of shape and two vertical reinforcements arranged side by side to match, a left side
There are gaps with the place of docking after right Gripper body two vertical reinforcements arranged side by side of holding for Gripper body.
Respective the one of above-mentioned second left side, half fixture block 21 and the second right half fixture block 22, left Gripper body and right Gripper body
Can set up defences sliding asperities in a semicircle orifice 23.
The structure of the upper grip can be with are as follows: the second left half fixture block and the second right half fixture block or left collet sheet and right collet
It can respectively be directly provided with anti-skidding asperities on interface at the docking of ontology, i.e., do not set a semicircle orifice and directly with anti-skidding
Asperities embrace cylinder.Certainly the preferably above first embodiment for setting a semicircle orifice.
First level is greater than the width that two vertical reinforcements 3 arranged side by side are simultaneously muscle, first level to the width of U-shaped notch 15
To U-shaped notch 15 two piece arranged side by side vertical reinforcement 3 of the width dimensions preferably than being accommodated width dimensions can it is big by 0.2~
0.6mm.Steel hook 8 is shelved at the coupler body of transverse steel 2 as recessed arcwall face, is sliding combined on arcwall face and arc
The arc shaped slider 10 that shape face matches, the top surface of arc shaped slider 10 is the arc groove for shelving transverse steel, is had on arc shaped slider 10
Two vertical reinforcements arranged side by side of accommodating are the second horizontal direction U-shaped notch 16 of simultaneously muscle, the width of the second horizontal direction U-shaped notch 16
Greater than first level to the width of U-shaped notch 15, such as width of the second horizontal direction U-shaped notch 16 is greater than first level to U
The width 2mm of font notch 15, effect be avoid to and muscle generate interference during stretching.Two of shearing resistance sample 1 are simultaneously
Column vertical reinforcement 3 is located at first level to the inside of U-shaped notch 15, and the transverse steel 2 of shearing resistance sample 1 is located at two side by side
The outside of vertical reinforcement 3.The vertical reinforcement arranged side by side of two of 2 or more the transverse steel of criss-cross shearing resistance sample 1 is i.e. and muscle is
Free end is not contacted with any part in experimental provision, is also not subject to shear in this experiment, and length can be 150mm or so.
Bearing length of the transverse steel 2 on the arc shaped slider of two sides is respectively preferably in 25mm or more.It can be appreciated that the arc is sliding
The sliding of block 10 and arcwall face is that displacement of the transverse steel 2 at coupler body refers to i.e. horizontal around the direction of the rotation of 7 axis of hinged shaft
Axial displacement to the radial or circumferentially displaced of reinforcing bar 2, without referring to transverse steel 2, that is, transverse steel is on arc shaped slider 10
Opposite coupler body can not generate axial displacement.So can set up defences only on transverse steel and arc shaped slider, on arc shaped slider and coupler body
The structure of axial displacement, such as axial limiting lines or arc strip, so that transverse steel energy opposing arcuate sliding block, arc shaped slider are opposite
The radial displacement of coupler body energy is circumferentially displaced without axial displacement.
Certainly, the above are preferred, transverse steel can also be directly rested on the coupler body of steel hook.
The present invention using device described in any of the above one to the method for welded steel fabric and the test of muscle solder joint shearing resistance,
Using following steps:
1., from finished product welded steel fabric interception include a transverse steel 2 and two vertical reinforcements 3 arranged side by side cross
Shearing resistance sample 1.Because be by and muscle concordantly cut, interception use the prior art tool and method, such as adopt
With cutter shear or with oxyacetylene metal-cutting tool cutting etc., which does not have technical difficulty.
2., the transverse steel 2 of shearing resistance sample 1 is shelved on steel hook 8, such as by the lateral steel of shearing resistance sample 1
Muscle 2 is shelved in the arc groove of arc shaped slider 10, two vertical reinforcements 3 arranged side by side in inside, transverse steel 2 on the outside, two
Vertical reinforcement 3 arranged side by side is passed down through the second horizontal direction U-shaped notch 16 and first level is to U-shaped notch 15 and lower part extends to
First level is to 15 or less U-shaped notch.
3., with the upper grip 5 of shearing resistance force tester steel hook 8 upper ends such as cylinder 13 is clamped, with shearing resistance force tester
Lower collet 11 two of shearing resistance sample 13 bottom ends of vertical reinforcement arranged side by side are clamped.
4., starting testing machine, the downward pulled straight of lower collet 11 of testing machine made shearing resistance by the blocking of transverse steel 2
Transverse steel 2 in power sample 1 and at the solder joint of two vertical reinforcements 3 arranged side by side by shearing action, and read the shearing of display
Value.
Due to generating sliding effect using above-described hinged shaft structure and sliding block, that is, due to hinged shaft and arc shaped slider
Adjustment effect, transverse steel with respect to steel hook front-rear direction position it is adjustable, can better ensure that cylinder axis and two simultaneously
The middle line of column vertical reinforcement is on same vertical line.
5., be calculated using the following equation out the theoretical shear value of the sample: V >=2 × 0.3fykAs, wherein fyk is reinforcing bar
Yield strength standard value, As are the area of section of a reinforcing bar；Theoretical shear value and the testing machine institute of the sample will be calculated again
It reads shear value to compare, the read shear value of testing machine is greater than or equal to theoretical shear value, determines that the cross shearing resistance sample closes
Lattice, the read shear value of testing machine are less than theoretical shear value, determine that the cross shearing resistance sample is unqualified.
Step expansion is said: according to standard GB/T/T1499.3 " concrete reinforcement steel " and professional standard
JGJ114-2014, single reinforcement discrimination standard are yield forces as defined in the reinforcing bar of theoretical shear value V >=0.3 times one, i.e. V >=
0.3fykAs.And simultaneously muscle is two reinforcing bars simultaneously by pulling force effect, so, V >=2 × 0.3fykAs, i.e. V >=0.6fykAs.fyk
Stress N/mm2Mpa yield strength standard value.Such as: diameter 10mm, V >=2 × 0.3 × reinforcement yielding strength standard value is
400N/mm2=fyk.V≥2×0.3×400×π/4×102=18849.6N=18.85kN.Those skilled in the art know
Road, V are actual measurement sample shearing resistance force value, unit KN.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.It is all within spirit of that invention and principle, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of welded steel fabric and muscle solder joint shearing resistance experimental rig, including the lateral steel for shelving shearing resistance sample (1)
Muscle (2) steel hook (8), for clamp steel hook (8) top shearing resistance force tester upper grip (5) and for pressing from both sides
The lower collet (11) of the vertical reinforcement bottom end of shearing resistance sample (1) is held, steel is linked up at the coupler body of (8) accommodating transverse steel (2)
There is the first level of accommodating vertical reinforcement to U-shaped notch (15), it is characterised in that: the steel hook (8) is divided into clamping
Portion (6) and body part (9), clamping part (6) and body part (9) are hinged；Lower collet (11) is that can clamp the two of shearing resistance sample (1)
The collet of root vertical reinforcement arranged side by side (3).
2. welded steel fabric according to claim 1 and muscle solder joint shearing resistance experimental rig, it is characterised in that: first level
Width dimensions to U-shaped gap width size vertical reinforcement more arranged side by side than two accommodated are 0.2~0.6mm big.
3. welded steel fabric according to claim 1 or 2 and muscle solder joint shearing resistance experimental rig, it is characterised in that: shearing resistance
The vertical reinforcement (3) arranged side by side of two of power sample (1) is located inside of the first level to U-shaped notch (15), shearing resistance sample (1)
Transverse steel (2) be located at the outsides of two vertical reinforcements (3) arranged side by side.
4. welded steel fabric according to claim 1 and muscle solder joint shearing resistance experimental rig, it is characterised in that: the steel
Hook (8) shelves at the coupler bodies of transverse steel (2) as recessed arcwall face, is sliding combined on arcwall face and arcwall face matches
Arc shaped slider (10), the top surface of arc shaped slider (10) are the arc groove for shelving transverse steel (2), and arc shaped slider has appearance on (10)
Set the second horizontal direction U-shaped notch (16) of two vertical reinforcements (3) arranged side by side.
5. welded steel fabric according to claim 4 and muscle solder joint shearing resistance experimental rig, it is characterised in that: second is horizontal
It is greater than width of the first level to U-shaped notch (15) to the width of U-shaped notch (16).
6. welded steel fabric according to claim 1 and muscle solder joint shearing resistance experimental rig, it is characterised in that: the clamping
The top in portion (6) is cylinder (13), and one is flat piece in the lower part of clamping part (6) and body part (9) top, is had in another one
For the vertical U-shaped notch of flat piece of activity insertion, there is mutual corresponding hinge on the flat piece of two sidewalls with vertical U-shaped notch
Hole is connect, the transverse steel (2) of the hinged shaft (7) in hinge hole and shearing resistance sample (1) is arranged in parallel.
7. welded steel fabric according to claim 1 and muscle solder joint shearing resistance experimental rig, it is characterised in that: the lower folder
The structure of head (3) are as follows: respectively removable on two Gripper bodies of left and right to be connected with the first left half fixture block (17) and the first right half fixture block
(18), the first left half fixture block (17) respectively has shape and two vertical reinforcements arranged side by side with the place of docking of the first right half fixture block (18)
(3) two semicircle orifices (19) that respective radius shape matches, the first left half fixture block (17) are held tightly with the first right half fixture block (18)
There are the first gap (20) at docking after two vertical reinforcements (3) arranged side by side.
8. welded steel fabric according to claim 1 or claim 7 and muscle solder joint shearing resistance experimental rig, it is characterised in that: described
The structure of upper grip (5) are as follows: respectively removable on two Gripper bodies of left and right to be connected with the second left half fixture block (21) and second right half
Fixture block (22), the second left half fixture block (21) respectively have shape and cylinder (13) radius shape with the place of docking of the second right half fixture block (22)
The semicircle orifice (23) that shape matches, the place of docking after the second left half fixture block (21) holds cylinder tightly with the second right half fixture block (22) is stayed
There are the second gap (24).
9. a kind of, using device described in any one of claim 1~8, to welded steel fabric, simultaneously muscle solder joint shearing resistance is tested
Method, it is characterised in that: the following steps are included:
1., from finished product welded steel fabric interception include a transverse steel (2) and two vertical reinforcements (3) arranged side by side cross
Shearing resistance sample (1)；
2., the transverse steel (2) of shearing resistance sample (1) is shelved on steel hook (8), under two vertical reinforcements (3) arranged side by side
Portion extends to first level to U-shaped notch (15) below；
3., with the upper grip (5) of shearing resistance force tester steel hook (8) upper end is clamped, with the lower collet of shearing resistance force tester
(11) two of shearing resistance sample (1) vertical reinforcement arranged side by side (3) bottom ends are clamped；
4., starting testing machine, lower collet (11) downward pulled straight of testing machine made shearing resistance by the blocking of transverse steel (2)
Transverse steel (2) in power sample (1) and at the solder joint of two vertical reinforcements (3) arranged side by side by shearing action, and read display
Shear value；
5., be calculated using the following equation out the theoretical shear value of the sample: V >=2 × 0.3fykAs, wherein fykIt is strong for reinforcement yielding
Spend standard value, AsFor the area of section of a reinforcing bar；Again the theoretical shear value for calculating the sample is read to shear with testing machine
Value compares, and the read shear value of testing machine is greater than or equal to theoretical shear value, determines that the cross shearing resistance sample is qualified, test
The read shear value of machine is less than theoretical shear value, determines that the cross shearing resistance sample is unqualified.
10. it is a kind of using device as claimed in claim 9 to welded steel fabric and muscle solder joint shearing resistance test method, feature
It is:
Step 2. in, the transverse steel (2) of shearing resistance sample (1) is shelved in the arc groove of arc shaped slider (10), two
Root vertical reinforcement arranged side by side (3) is in inside, and on the outside, two vertical reinforcements (2) arranged side by side are passed down through the second level to transverse steel (2)
To U-shaped notch (16) and first level to U-shaped notch (15) and lower part extend to first level to U-shaped notch (16) with
Under；
Step 3. in, the cylinder (13) of steel hook (8) is clamped with the upper grip (5) of shearing resistance force tester.
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