CN102692346A - Steel bar truss welding mechanical property test method - Google Patents
Steel bar truss welding mechanical property test method Download PDFInfo
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- CN102692346A CN102692346A CN2012101958080A CN201210195808A CN102692346A CN 102692346 A CN102692346 A CN 102692346A CN 2012101958080 A CN2012101958080 A CN 2012101958080A CN 201210195808 A CN201210195808 A CN 201210195808A CN 102692346 A CN102692346 A CN 102692346A
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- steel bar
- main hook
- muscle
- slide block
- locating shaft
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Abstract
The invention relates to a steel bar truss welding mechanical property test method and belongs to steel structural component performance tests, in particular to a steel bar truss welding point shearing resistance test method. A special test clamp formed by connecting a main hook, a positioning shaft, a slide block, a regulating screw bolt and a base is used, and the operation is carried out according to steps of test sample preparation, clamp installation, test sample clamp installation, main hook regulation, stretching and yield judgment. The steel bar truss welding mechanical property test method has the advantages that the conception is novel, the structure is simple, the use is convenient and reliable, one device has multiple purposes, and the test method can be used for mechanical tests of trusses in multiple specifications; and the normal-temperature test sample manufacture is adopted, the operation is simple and convenient, the time consumption is low, measuring data is real, accurate and reliable, the efficiency is high, and the energy source consumption is avoided.
Description
Technical field
The invention belongs to the steel construction piece mechanical property test, relate in particular to steel bar girder pad shearing resistance method.
Background technology
Steel bar girder product welding quality directly influences the usability of truss, must the shearing resistance of pad be detected after the truss welding, can come into operation after qualified.Because after the truss welding, the certain included angle that has between abdomen muscle and the string muscle, and along with the variation of truss depth, its angle also has nothing in common with each other, and this brings difficulty with regard to the mechanical test to the truss pad.Current is on the string muscle of the pad that is detected, to add earlier test reinforcing bar that becomes 180 degree with the abdomen muscle of weldering in the method that detects the pad shearing resistance; During detection, the termination of reinforcing bar sample is clipped in testing machine one end, and the test steel bar end that is connected with the string muscle is clipped in the other end of testing machine; Drawn makes the pad sealing-off of surveying, thereby records the shearing resistance data of pad.The defective that exists is: add weldering test reinforcing bar at the string muscle, secondary welding produces very big influence to the shear behavior of survey pad, can not accurately reflect the shearing resistance of the pad of surveying, and causes measurement data inaccurate; Each detection all will add weldering test reinforcing bar, and must guarantee to add the shearing resistance that the shearing resistance of welding the solder joint of testing reinforcing bar is greater than the pad of surveying; Need welding gear, consumes energy, the running time is long, and testing efficiency is low.
Summary of the invention
In order to overcome the defective that prior art exists; The purpose of this invention is to provide a kind of steel bar girder welding mechanics method for testing performance; Use special-purpose test fixture, what guarantee abdomen muscle chord muscle during test receives force direction on same straight line, and test figure is true, accurate, reliable; No energy consumption, fast detecting improves detection efficiency.
Steel bar girder welding mechanics method for testing performance uses special-purpose test fixture, carries out according to the following steps:
1, under the sample production normal temperature, adopts mechanical sampling, have the string muscle and the abdomen muscle of the pad of surveying in the intercepting steel bar girder;
2, the fixed head of sectional fixture base plate is fixed on an end of cupping machine;
3, the string muscle that clamps the sample truss places the gib head lower edge, is blocked by strip projected parts, and the abdomen muscle places the sample open slot, and the abdomen muscle is fixed on the cupping machine other end;
4, the adjustment main hook rotate to be regulated bolt, drives slide block, locating shaft and main hook and moves to left or move to right, and main hook is made self-adaptation and rotated, and the force direction that receives of abdomen muscle and string muscle is coexisted on the straight line, guarantees the sample stretched vertically;
5, stretching starts the cupping machine tension test, until abdomen muscle and string muscle sealing-off; Record mechanics data;
6, product quality judge disposal data and required standard contrast are passed judgment on.
The mechanical properties of welded steel truss test method uses a special test fixture, the fixture is characterized by the main hook, positioning axis and slider adjustment bolt and the base connected to form, said front end of the main hook set hook, hook set sample opening groove, steel truss chord reinforcement is placed below the hook, Stirrups placed? specimen opening slot; backend setting bit bushings, connected with the slider? positioning axis slide bushings mounted in the positioning, the positioning the main axis and rotate the hook to provide positioning, positioning the main hook around the rotation axis slide; slide slide mounted on the base set of rectangular chute, and located on the side wall of the rectangular chute adjustment bolt connection, turn the adjusting bolt, slide along the rectangular chute move around, positioning axes and main hook also moves through the slider moving and positioning axis rotation around the main hook, ensuring specimen capable of vertical stretch; consists of a fixed base plate and connected to a tensile testing machine .During detection, cupping machine one end clamping abdomen muscle, the other end is clamped the fixed head of base, and drawn makes the solder joint sealing-off of surveying, and records the shearing resistance data of pad.
The rectangle chute is established on described base top, and the slide block cunning is contained in the chute; Chute wall is established the adjusting bolt hole and is cooperated with the adjusting bolt, and the adjusting bolt that has handle places regulates bolt hole; Screw is established in the fixed head bottom that base is established, and plate washer is by being bolted on the fixed head, make be connected with cupping machine firm.
Described main hook is approximate obtuse triangle, and gib head is established in the front, elongated boss; Strip projected parts is established in the boss outer; The sample open slot is established in the gib head stage casing, its angle=35 ~ 73 °, and the steel bar girder sample that is suitable for angle between abdomen muscle and the string muscle and is 35 ~ 73 ° carries out tension test; Cylindrical location axle sleeve is established in the main hook rear end, and locating shaft is loaded in it.
Described slide block is a rectangular parallelepiped, and oppositely " T " connected in star is established in the upper end, and screw is established in the slide block outside, and bolt passes the slide block baffle plate of being wider than the chute width and is fixed on the slide block, and anti-limited slip block comes off; Step and locating shaft are established in the slide block inboard, and step width had both hindered a grade slide block and come off greater than the chute width, again main hook and base was separated; Locating shaft is located on the slide block step, and diameter matches with the location sleeve diameter that main hook is established, and the locating shaft cunning is contained in the axle sleeve of location, and by locating shaft plate washer and bolt, main hook rotates around locating shaft; Slide block is constrained in the rectangle chute by slide block plate washer and step, horizontally slips.
Described adjusting bolt cooperates with the adjusting bolt hole that base is established, and front end is established " T " shape connector, cooperates, links together with reverse " T " connected in star that slide block is established; Handle is established in the rear end, rotates and regulates bolt, drives slide block and moves.
Compared with prior art, advantage is: novel, simple in structure, easy to use, reliable, the many usefulness of a tool can be used for plurality of specifications truss mechanical test; Adopt normal temperature to make sample, easy and simple to handle, consuming time few, measurement data truly, accurately and reliably, efficient is high, goes back energy free consumption.
Description of drawings
The contrast accompanying drawing is described further the present invention below.
Fig. 1 is the special-purpose test fixture structural representation of steel bar girder welding mechanics method for testing performance.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is Fig. 1 view afterwards.
Embodiment
Can find out that by Fig. 1, Fig. 2 and Fig. 3 steel bar girder welding mechanics performance test unit clamp is connected and composed by main hook 1, locating shaft 2 and slide block 3, adjusting bolt 4 and base 5; The main hook front end is established rectangular shape gib head 6; Gib head is established sample open slot 7; Cylindrical location axle sleeve 8 is established in the rear end, and locating shaft is connected with slide block, and the locating shaft cunning is contained in the axle sleeve of location.The slide block cunning is contained in the rectangle chute 9 that base establishes, and is connected with adjusting bolt on being located at the rectangle chute wall.Base is divided into fixed head 10, is connected with cupping machine (not marking among the figure).
It can also be seen that by Fig. 1, Fig. 2 closed rectangle chute is established on base top, the slide block cunning is loaded in the chute, and rectangle chute right side wall is established and regulated bolt hole (not marking among the figure); Base is divided into fixed head, and screw (not marking among the figure) is established in the fixed head lower end, and plate washer 11 is by being bolted on the fixed head.
It can also be seen that by Fig. 1, Fig. 2 and Fig. 3 main hook is approximate obtuse triangle, gib head is established in the front, and elongated, strip projected parts (among the figure mark) is established in the boss outer, and dihedral sample open slot is established in the gib head stage casing, both sides angle=35 ~ 73 of groove °.Cylindrical location axle sleeve 8 is established in the main hook rear end, and locating shaft is loaded on wherein.
It can also be seen that by Fig. 1 Fig. 2 and Fig. 3 slide block 3 is a rectangular parallelepiped, oppositely " T " connected in star is established in the upper end, and screw (not marking among the figure) is established in the slide block outside, and the chute baffle plate 12 of being wider than the chute width is by being bolted on the slide block, and anti-limited slip block comes off.Step 13 and locating shaft are established in the slide block inboard, and step width is greater than the chute width, and resistance shelves slide block comes off, and again main hook and base is separated.Locating shaft is located on the step of slide block, and the location sleeve diameter of establishing on diameter and the main hook matches, and the locating shaft cunning is contained in the axle sleeve of location.Screw is established in the locating shaft outer end, and locating shaft plate washer 14 stops locating shaft to come off by being bolted on the axle head of location.Slide block is constrained in the rectangle chute by slide block baffle plate and step.
Can find out by Fig. 1 and Fig. 3, regulate bolt and cooperate, regulate the bolt front end and establish " T " shape connector, cooperate, link together with reverse " T " connected in star that slide block is established with the adjusting bolt hole that base is established; Regulate the bolt rear end and establish grip hole, handle 15 is packed in the grip hole (not marking among the figure).
Steel bar girder welding mechanics method for testing performance
With muscle diameter 10 mm that wind up, abdomen muscle diameter 6mm, lower edge muscle diameter 8mm, the shearing resistance value is that the steel bar girder CRB550 of 8490N is an example, carries out mechanical property test.
(1) the sample production height is the steel bar girder of 190mm, the abdomen muscle and muscle angle 62 degree that wind up, and by shearing resistance sample sampling rule tape welding point sample of intercepting on winding up, abdomen muscle length is no less than 100 mm, and the muscle that winds up is blocking apart from solder joint 150mm place.
(2) sectional fixture anchor clamps base plate is fixed on cupping machine one end.
(3) clamp sample string muscle and place the gib head lower edge, the abdomen muscle places the sample open slot, and the abdomen muscle is fixed on the cupping machine other end.
(4) the adjustment main hook rotate to be regulated bolt, locating shaft rotation center 19 mm that move right, and limit, oblique angle, anchor clamps inclination angle is 62 degree, guarantees that the abdomen muscle receives force direction and anchor clamps to receive force direction on same straight line.
(5) stretching starts the cupping machine tension test, until abdomen muscle and string muscle sealing-off; The test specimen related data is listed in the table 1, and the data of test are listed in the table 2.
Comparative Examples by above-mentioned each embodiment intercepting test specimen, adds weldering test reinforcing bar on the string muscle, carry out tension test by prior art, records the mechanics data and lists in the table 2.
Table 1 test specimen parameter and anchor clamps moving state table
Table 2 this method embodiment and Comparative Examples test mechanics tables of data
Can find out by last table: sampling under the same conditions, use prior art and record very instability of data, and it is far away to depart from actual value, causes erroneous judgement.And use data stabilization that anchor clamps of the present invention and test method record, accurately, reliable, can truly reflect the shearing resistance performance of steel bar girder pad.
Claims (2)
1. steel bar girder welding mechanics method for testing performance uses special-purpose test fixture, carries out according to the following steps:
1). under the normal temperature, adopt mechanical sampling, have the string muscle and the abdomen muscle of the pad of surveying in the intercepting steel bar girder;
2). the fixed head of sectional fixture base plate is fixed on an end of cupping machine;
3). the string muscle that clamps the sample truss places the gib head lower edge, is blocked by strip projected parts, and the abdomen muscle places the sample open slot, and the abdomen muscle is fixed on the cupping machine other end;
4). the adjustment main hook rotate to be regulated bolt, drives slide block, locating shaft and main hook and moves to left or move to right, and main hook is made self-adaptation and rotated, and the force direction that receives of abdomen muscle and string muscle is coexisted on the straight line, guarantees the sample stretched vertically;
5). stretching starts the cupping machine tension test, until abdomen muscle and string muscle sealing-off; Record mechanics data;
6). product quality passes judgment on disposal data and the required standard contrast is passed judgment on.
2. according to claim 1. the special-purpose test fixture that steel bar girder welding mechanics method for testing performance uses; It is characterized in that these anchor clamps are connected and composed by main hook (1), locating shaft (2) and slide block (3), adjusting bolt (4) and base (5); Described main hook front end is established gib head (6); Gib head is established sample open slot (7), and steel bar girder string muscle places the gib head below, and the abdomen muscle places the sample open slot; Position axle sleeve (8) is set in the rear end, and the locating shaft cunning that connects with slide block is contained in the axle sleeve of location, and main hook slides around locating shaft and rotates; The slide block cunning is contained in the rectangle chute (9) that base establishes, and is connected with adjusting bolt on being located at the rectangle chute wall, moves with main hook through slide block and rotates around locating shaft, guarantees the test specimen stretching of can hanging down; Base is divided into fixed head (10) and is connected with cupping machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101958080A CN102692346A (en) | 2012-06-14 | 2012-06-14 | Steel bar truss welding mechanical property test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101958080A CN102692346A (en) | 2012-06-14 | 2012-06-14 | Steel bar truss welding mechanical property test method |
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| CN102692346A true CN102692346A (en) | 2012-09-26 |
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| CN2012101958080A Pending CN102692346A (en) | 2012-06-14 | 2012-06-14 | Steel bar truss welding mechanical property test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277452A (en) * | 2014-06-25 | 2016-01-27 | 宝山钢铁股份有限公司 | Band steel inverse-bending detection device and detection method |
| CN110595919A (en) * | 2019-07-19 | 2019-12-20 | 江阴市建鑫金属有限公司 | Method for testing fatigue strength of steel bar welded mesh |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2669173Y (en) * | 2003-12-10 | 2005-01-05 | 同济大学 | Concrete-bar welding-net soldered-dot shearing-test clamp |
| CN201177587Y (en) * | 2007-12-28 | 2009-01-07 | 浙江昆仑建设集团股份有限公司 | Jigs for checking reinforcing steel bar-steel plate welding strength |
-
2012
- 2012-06-14 CN CN2012101958080A patent/CN102692346A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2669173Y (en) * | 2003-12-10 | 2005-01-05 | 同济大学 | Concrete-bar welding-net soldered-dot shearing-test clamp |
| CN201177587Y (en) * | 2007-12-28 | 2009-01-07 | 浙江昆仑建设集团股份有限公司 | Jigs for checking reinforcing steel bar-steel plate welding strength |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国工业和信息化部: "YB/T4262-2011钢筋混凝土用钢筋桁架", 《中华人民共和国黑色冶金行业标准》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277452A (en) * | 2014-06-25 | 2016-01-27 | 宝山钢铁股份有限公司 | Band steel inverse-bending detection device and detection method |
| CN105277452B (en) * | 2014-06-25 | 2017-10-31 | 宝山钢铁股份有限公司 | A kind of strip recurvation detection means and its detection method |
| CN110595919A (en) * | 2019-07-19 | 2019-12-20 | 江阴市建鑫金属有限公司 | Method for testing fatigue strength of steel bar welded mesh |
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Application publication date: 20120926 |