CN103615073B - Equal strength welding point beam stirrup - Google Patents
Equal strength welding point beam stirrup Download PDFInfo
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- CN103615073B CN103615073B CN201310697134.9A CN201310697134A CN103615073B CN 103615073 B CN103615073 B CN 103615073B CN 201310697134 A CN201310697134 A CN 201310697134A CN 103615073 B CN103615073 B CN 103615073B
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Abstract
The present invention is equal strength welding point beam stirrup openly, comprises the outer reinforcement of rectangular configuration, and outer reinforcement is an Integral Steel rib, after the orthogonal structure of Bending Processing, its two ends butt welding is connected; Being welded to connect a little of described outer reinforcement two ends butt welding, forms Butt Joint, and the two ends of stirrup limb bar are welded on respectively two opposite side of outer reinforcement, forms T font welding point; Butt Joint bidirectional stretch test pull-off force exceedes the reinforcing rod mother metal ultimate tension of outer reinforcement, and T font welding point bidirectional stretch test pull-off force exceedes reinforcing rod mother metal ultimate tension, and shear test pull-off force at least reaches 90% of mother metal ultimate tension. Beam stirrup of the present invention, the degree of depth that two reinforcing rods are pressed into mutually exceedes 50%, forms firmly syndeton; The average pull-off force of welding point reaches mother metal ultimate tension, even exceedes mother metal ultimate tension, and in the time that mother metal ruptures, welding point is still complete; There is excellent mechanical property, be not only applied to wall, the plate of building, more can be applied on beams of concrete as stirrup, meet the needs of building.
Description
Technical field
The present invention relates to the rectangular configuration stirrup that a kind of building field is used, especially equal strength welding point beam stirrup.
Background technology
Stirrup is one of material important in xoncrete structure, and its effect in xoncrete structure mainly contains following severalPoint: 1, shearing resistance effect, stirrup, except directly bearing shearing, has also limited carrying out of diagonal crack widths indirectly, has strengthened bellyConcrete aggregate interlocking force; 2, limit the effect of main muscle lateral deformation, fixing vertical muscle position; 3, improve concrete crushing strengthAnd ductility distortion; 4, retrain the effect of the structure transversely deforming causing because of creep, physical change etc., split to prevent or to reduce longitudinallySeam.
There is above-mentioned effect just because of stirrup, in concrete component, extensively adopted the stirrup of various structures, shape,To meet the requirement of building to xoncrete structure. At present at building engineering field, two of stirrup are in contact with one another or intersectBetween reinforcing bar usually by butt welding (termination, two ends of one or two reinforcing bar), cross weldering (in the reinforcing bar of two intersectionsPortion), the welding manner such as the T-shaped weldering termination of other (middle part of a reinforcing bar with) is connected, the welding procedure of employing is resistanceSpot welding, object is only reinforcing bar location and fixing, two mutual compression distances of the identical reinforcing bar of diameter are generally no more than 30%, stateThe final welding point forming of family's standard " xoncrete structure welded steel fabric sheet " regulation is through shear test, and pulling force only needs to reachTo 70% of parent material of reinforcement rebar ultimate tension. For two not identical reinforcing bars of diameter, it is straight that mutual compression distance is generally less reinforcing bar18%～25% of footpath. Adopt the stirrup of this kind of resistance electric welding joint, the welding point that its reinforcing bar crossover sites formsRelevant mechanical performance index, well below parent material of reinforcement rebar, its welding point position is a weak link, relevant mechanical property refers toMark lowlyer or very low, can not meet the needs of building.
Due to the relevant mechanical performance index of welding point of reinforcing bar crossover sites formation, well below parent material of reinforcement rebar. This kindWhen welded net reinforcing bar is applied to floor, because compression distance is less, therefore affect depth of compressive zone, to reinforced concrete memberUnfavorable; And this kind of welded net reinforcing bar is generally only applied to wall, the plate of building, can not be applied in concrete as stirrupOn post, can not bear larger pressure-acting, because its welding joint mechanical property is less demanding.
Summary of the invention
The problems referred to above that exist for prior art, the invention provides a kind of strength of welded joint and equate with parent material of reinforcement rebar,Or at least reach the equal strength welding point beam stirrup of strength of parent 90%.
To achieve these goals, the present invention adopts following technical scheme: a kind of equal strength welding point beam stirrup, comprisesThe outer reinforcement of rectangular configuration, outer reinforcement is an Integral Steel rib, after the orthogonal structure of Bending Processing, by its two endsButt welding and connecting; It is characterized in that: being welded to connect a little of described outer reinforcement two ends butt welding, forms docking weldingHead, in the outer reinforcement of rectangular configuration, is provided with some lateral tie limb bars and longitudinal stirrup limb bar, stirrup limb barTwo ends are welded on respectively two opposite side of outer reinforcement, form T font welding point; ;
Described Butt Joint, it is long that the degree of depth that two ends is pressed into is mutually greater than the overlap joint of 80%, two termination of diameter DDegree L is (0.5-1.5) D, and the height H of Butt Joint 2 is (1.0-1.2) D; Butt Joint bidirectional stretch test pull-off forceExceed the reinforcing rod mother metal ultimate tension of outer reinforcement;
Described T font welding point, the degree of depth P that one end of stirrup limb bar and outer reinforcement are pressed into is mutually greater than diameter d50%, the diameter of stirrup limb bar is d, outer reinforcement diameter D is more than or equal to the diameter d of stirrup limb bar, T font welding point 4Height H be 1.0D-(1.0D+0.5d); T font welding point bidirectional stretch test pull-off force exceedes the reinforcing rod mother metal limitPulling force, shear test pull-off force at least reaches 90% of mother metal ultimate tension.
Further feature is: the degree of depth that described Butt Joint is pressed into mutually equates with diameter D, the height of welding pointH equates with diameter D.
The two ends of stirrup limb bar are vertical with the limit of the outer reinforcement being connected.
Compared to existing technology, equal strength welding point beam stirrup of the present invention, tool has the following advantages:
1, the degree of depth that two reinforcing rods are pressed into mutually exceedes 50%, forms firmly syndeton;
2, through multi-drawing test, the average pull-off force of welding point reaches mother metal ultimate tension, even exceedes the mother metal limitPulling force, in the time that mother metal ruptures, welding point is still complete;
3,, through shearing test repeatedly, the maximum pull-off force of welding point reaches 90% of mother metal ultimate tension;
4, through bend test repeatedly, there is not crackle in welding point Bend diameter 3D;
Welding point equates to have excellent mechanical property substantially with the intensity of mother metal, be not only applied to building wall,Plate, more can be applied on beams of concrete as stirrup, meets the needs of building.
Brief description of the drawings
Fig. 1 is hooping structure schematic diagram of the present invention;
Fig. 2-1,2-2,2-3,2-4,2-5,2-6,2-7 are butt welded joint structural representations of the present invention;
Fig. 3-1,3-2,3-3,3-4,3-5,3-6 are T font welding point schematic diagrames of the present invention.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, knot belowClose concrete diagram, further set forth the present invention.
In Fig. 1, welded mesh sheet stirrup for concrete structure of the present invention, comprises the outer reinforcement 1 of rectangular configuration, skinReinforcing bar 1 is an Integral Steel rib, after the orthogonal structure of Bending Processing, its two ends butt welding is connected, and obtains itOuter field rectangular configuration; Being welded to connect a little of its two ends, forms Butt Joint 2. The docking solder joint of outer reinforcement 1, should putIn the middle part on the long limit of outer rectangular configuration.
In the outer reinforcement 1 of rectangular configuration, be provided with some lateral tie limb bars 3 and longitudinal stirrup limb bar 3, hoopThe two ends of muscle limb bar 3 are welded on respectively two opposite side of outer reinforcement 1, form T font welding point 4; Lateral tie limb bar 3 and verticalTo the crosspoint of stirrup limb bar 3, adopt the mode of welding to connect, form cross welding point 5; Described lateral tie limb bar3 and longitudinal stirrup limb bar 3 and outer reinforcement 1, form network structure, form welded net stirrup. Horizontal and vertical stirrupThe quantity of limb bar 3, arrangement mode, spacing each other etc., determine according to the concrete size of concrete component and technological requirement,Designing requirement according to beams of concrete, concrete column is determined; Stirrup limb bar 3 is generally transverse horizontal or is longitudinally arranged vertically, withThe limit that outer reinforcement 1 is connected is perpendicular, and angle is 90 degree.
If Fig. 2-1 is to as shown in 2-7, the Butt Joint 2 of equal strength welding point beam stirrup of the present invention, outer reinforcement 1The lap of splice L that the degree of depth that two ends is pressed into is mutually greater than 80%, two termination of diameter D is (0.5-1.5) D, docking welding2 height H is (1.0-1.1) D; Butt Joint 2 bidirectional stretch test pull-off forces exceed the reinforcing rod mother of outer reinforcement 1Material ultimate tension, shear test pull-off force at least reaches 90% of reinforcing rod mother metal ultimate tension. Two reinforcing rods are pressed into mutuallyThe degree of depth, the concrete numerical value that can choose is: 0.55D, 0.6D, 0.65D, 0.7D, 0.75D, 0.8D, 0.85D, 0.9D, 0.95D, 1.0D, be generally greater than after 0.8D, and relevant mechanical performance index reaches or approaches equal strength, if WelderSkills etc. are chosen suitable, more than 0.5D, just substantially reach or approach equal strength. Welding point height H, that can choose is concreteNumerical value is: 1.0D, 1.01D, 1.02D, 1.03D, 1.04D, 1.05D, 1.06D, 1.07D, 1.08D, 1.09D,1.1D, and in the time of H=1.0D, be more conducive to arrange, have more use value.
As shown in Fig. 2-1,2-2,2-3,2-4, the two ends after a reinforcing rod bending, compression distance equates with diameter D,The height H of welding point equates with diameter D, and the termination of two reinforcing rods is all pressed into mutually, the lap of splice L=of two terminationsD, the weld seam 11 of welding point is straight line, is intersection.
Resistance crimping butt welding technology of the present invention, technical process is divided into four sections: preheating, energising, pressurization welding and tempering,Corresponding welding current, weld interval, pressure are different with material according to bar diameter, and respective change. The electricity that the present invention adoptsDamping connects butt welding, is not technical essential of the present invention, this area and technical staff can select relevant parameter with realize shouldTechnique, is not described in detail at this.
Resistance crimping butt operation process schematic representation of the present invention, by the two ends after the reinforcing rod bending of a diameter D(or termination of two reinforcing rods that be arranged in parallel, that diameter D is equal), is arranged between two electrodes, according to bar diameter,The parameters such as material and the degree of depth that is pressed into, choose suitable electrical current (voltage), conduction time, pre-forging force constant resistance dockingWelding parameter, first preheating, then energising make two reinforcing rods melt in a short period of time (softening), higher blocking pressure-actingOn two electrodes, two electrodes remake the two ends Australia boat (or on two reinforcing rods) that is used in reinforcing rod, promote two termination phasesDraw close mutually and be pressed into, the degree of depth that two terminations are pressed into be mutually greater than diameter D 80% and meet technological requirement after stop pressurization; SoRear tempering is modified, improves the mechanical property of welding point.
As shown in Fig. 2-5,2-6,2-7, Butt Joint 2 of the present invention is carried out to the performance examinations such as bending resistance, shearing, tensionTest, Welded Joints 90-degree bent, result ruptures in welding region (being a bit larger tham the region of the welding point lap of splice) nothing, cracking,Crack appears on reinforcing rod mother metal, does not occur in Butt Joint 2 regions; Result of the test is very satisfied, shows the present inventionThe mechanical performance index such as strength of welded joint approach, not even lower than the index of correlation of mother metal, realized equal strength welding, shapeBecome equal strength welding point.
If Fig. 3-1 is to as shown in 3-6, the T font welding point 4 of equal strength welding point stirrup of the present invention, adopts resistanceCrimping weldering welding, the diameter of stirrup limb bar is d, outer reinforcement diameter D is more than or equal to the diameter d of stirrup limb bar, stirrup limb bar 3The degree of depth P that is mutually pressed into of one end (link) and outer reinforcement 1 be greater than 80% of diameter d, the height H 2 of T font welding point 4Between 1.0D-(1.0D+0.2d); T font welding point 4 bidirectional stretch test pull-off forces reach the reinforcing rod mother metal limit and drawPower, shear test pull-off force at least reaches 90% of mother metal ultimate tension; Two degree of depth P that reinforcing rod is pressed into mutually, can chooseConcrete numerical value be: 0.55d, 0.6d, 0.65d, 0.7d, 0.75d, 0.8d, 0.85d, 0.9d, 0.95d, 1.0D, is generally being greater than after 0.8d, and relevant mechanical performance index reaches or approaches equal strength. Welding point height H 2, can chooseConcrete numerical value be: 1.0D, 1.05D, 1.06D, 1.08D, 1.10D, 1.12D, 1.15D, 1.18D, 1.20D, maximumFor 1.20D, and in the time of H=1.0D, stirrup limb bar 3 is all pressed in outer reinforcement 1, is more conducive to arrange, intensity is higher, has moreThere is use value.
In Fig. 3-2, compression distance P equates with diameter d, and the height H of welding point equates with diameter D, two reinforcing rod phasesAll be pressed into mutually.
The welding procedure of T font welding point 4 of the present invention, by two reinforcing rod (outer reinforcements of arranged crosswise in T shape1 and stirrup limb bar 3, be arranged between two electrodes, according to parameters such as bar diameter, material and the degree of depth that is pressed into, choose and closeSuitable electrical current (voltage), conduction time, pressure constant resistance crimping Welding parameter, at rear two reinforcing rods of energising very shortTime in melt (softening), on two electrodes of higher blocking pressure-acting, two electrodes act on two reinforcing rods again, push awayMoving two reinforcing rods are mutually drawn close and are pressed into. The welding procedure of itself and Butt Joint 2 is basic identical, is not technology of the present inventionMain points, are not described further at this.
As shown in Fig. 3-5,3-6, T font welding point 4 of the present invention is carried out to the performance tests such as bending resistance, tension, butt weldingJoint 90-degree bent, result is at welding region (being a bit larger tham the region of the welding point lap of splice) without fracture, cracking, and crack goes out, on the reinforcing rod mother metal of T font welding point 4, do not occur in T font welding point 4 regions now; Result of the test is very fullMeaning, show the mechanical performance indexs such as strength of welded joint of the present invention approach, not even lower than the index of correlation of mother metal, realizedEqual strength welding, has formed equal strength welding point.
Two kinds of welding points of stirrup of the present invention, Butt Joint 2, T font welding point 4, applicant has done thousands of timesContrast test, has obtained a large amount of experimental datas, and conclusion (of pressure testing) is: by regulating resistance crimping welding condition, make steelMuscle compression distance is in the time of 30% left and right, and it (is that mother metal is while being pulled off that the multipotency of the maximum pull-off force of shear test reaches mother metal ultimate tensionValue of thrust) 70%, average pull-off force only can reach 50% of mother metal ultimate tension; Reinforcing bar compression distance is in the time of 50% left and right, anti-The multipotency of the maximum pull-off force of scissor test reaches 90% of mother metal ultimate tension, and average pull-off force only can reach mother metal ultimate tension70%; Reinforcing bar compression distance is in the time of 80% left and right, the maximum pull-off force of shear test can exceed mother metal ultimate tension, i.e. two mother metalsReinforcing rod is pulled off, and welding point is not pulled off, and average pull-off force can reach 90% of mother metal ultimate tension. Welding pointBidirectional stretch test pull-off force exceedes reinforcing rod mother metal ultimate tension, and shear test pull-off force at least reaches mother metal ultimate tension90%。
The equal strength welding point of stirrup of the present invention, welding point equates (approaching) substantially with the intensity of mother metal, someIndex even exceedes mother metal, has excellent mechanical property, is not only applied to wall, the plate of building, more can apply as stirrupOn beams of concrete, post, meet the needs of building.
Finally explanation, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although referenceGood embodiment has been described in detail the present invention, and those of ordinary skill in the art should be appreciated that can be to skill of the present inventionArt scheme is modified or is equal to replacement, and does not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in thisIn the middle of the claim scope of invention.
Claims (2)
1. an equal strength welding point beam stirrup, comprise the outer reinforcement (1) of rectangular configuration, outer reinforcement (1) be one wholeBody formula reinforcing rod, after the orthogonal structure of Bending Processing, connects its two ends butt welding; It is characterized in that: described skinBeing welded to connect a little of reinforcing bar (1) two ends, forms Butt Joint (2), in the outer reinforcement (1) of rectangular configuration, is provided withSome horizontal or longitudinal stirrup limb bars (3), the two ends of stirrup limb bar (3) are welded on respectively two opposite side of outer reinforcement (1),Form T font welding point (4);
Described Butt Joint (2), adopts resistance crimping weldering welding, the degree of depth that described Butt Joint (2) is pressed into mutually withDiameter D is equal, and the height H of welding point (2) equates with diameter D; The lap of splice L of two terminations is (0.5-1.2) D, dockingThe horizontal tensile test pull-off force of plumb joint (2) exceedes the reinforcing rod mother metal ultimate tension of outer reinforcement (1);
Described T font welding point (4), adopts resistance crimping weldering welding, and the diameter of stirrup limb bar (3) is d, D be greater than or etc.In d, the degree of depth P that one end of stirrup limb bar (3) and outer reinforcement (1) are pressed into is mutually greater than 50% of diameter d, and T font connectsHead (4) bidirectional stretch test pull-off force exceedes reinforcing rod mother metal ultimate tension, and shear test pull-off force at least reaches the mother metal limit90% of pulling force.
2. equal strength welding point beam stirrup according to claim 1, is characterized in that: described stirrup limb bar (3) and phaseThe limit of the outer reinforcement (1) connecting is vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697134.9A CN103615073B (en) | 2013-12-19 | 2013-12-19 | Equal strength welding point beam stirrup |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697134.9A CN103615073B (en) | 2013-12-19 | 2013-12-19 | Equal strength welding point beam stirrup |
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| Publication Number | Publication Date |
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| CN103615073A CN103615073A (en) | 2014-03-05 |
| CN103615073B true CN103615073B (en) | 2016-05-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0871769A (en) * | 1994-09-09 | 1996-03-19 | Tokyu Constr Co Ltd | Method of fixing reinforcing bar for intersection |
| CN101684673A (en) * | 2009-08-26 | 2010-03-31 | 天津市建科机械制造有限公司 | Reinforcement bar truss mould plate and welding process |
| CN102251627A (en) * | 2011-04-27 | 2011-11-23 | 中冶建工集团有限公司 | Welded mesh sheet stirrup for concrete structure |
| KR20130070093A (en) * | 2011-12-19 | 2013-06-27 | 창원대학교 산학협력단 | Joint method and apparatus using resistance spot welding of steel reinforcement, and the steel reinforcement |
| CN203613721U (en) * | 2013-12-19 | 2014-05-28 | 中冶建工集团有限公司 | Constant-strength welding joint beam stirrup |
-
2013
- 2013-12-19 CN CN201310697134.9A patent/CN103615073B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0871769A (en) * | 1994-09-09 | 1996-03-19 | Tokyu Constr Co Ltd | Method of fixing reinforcing bar for intersection |
| CN101684673A (en) * | 2009-08-26 | 2010-03-31 | 天津市建科机械制造有限公司 | Reinforcement bar truss mould plate and welding process |
| CN102251627A (en) * | 2011-04-27 | 2011-11-23 | 中冶建工集团有限公司 | Welded mesh sheet stirrup for concrete structure |
| KR20130070093A (en) * | 2011-12-19 | 2013-06-27 | 창원대학교 산학협력단 | Joint method and apparatus using resistance spot welding of steel reinforcement, and the steel reinforcement |
| CN203613721U (en) * | 2013-12-19 | 2014-05-28 | 中冶建工集团有限公司 | Constant-strength welding joint beam stirrup |
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| CN103615073A (en) | 2014-03-05 |
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