CN101806688A - Automatic data collection device for unidirectional tension test of mechanical connecting joint of round steel with super-large diameter - Google Patents
Automatic data collection device for unidirectional tension test of mechanical connecting joint of round steel with super-large diameter Download PDFInfo
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- CN101806688A CN101806688A CN 201010131023 CN201010131023A CN101806688A CN 101806688 A CN101806688 A CN 101806688A CN 201010131023 CN201010131023 CN 201010131023 CN 201010131023 A CN201010131023 A CN 201010131023A CN 101806688 A CN101806688 A CN 101806688A
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Abstract
The invention discloses an automatic data collection device for a unidirectional tension test of a mechanical connecting joint of round steel with super-large diameter. The stress application bracket of the device comprises four round steel rods and two steel plates with through holes; the two steel plates are at both ends and are connected with each other through the four round steel rods; a connecting joint test-piece is formed by connecting two sections of round steels with diameter greater no less than 75mm by the connecting joint. A jack is located on one side of the stress application bracket, and the connecting joint test-piece sequentially penetrates through the central hole of the jack and the through hole of the stress application bracket; both ends of the connecting joint test-piece are fastened by fixing nuts. A plurality of strain gages are adhered at the middle of the connecting joint and located at the middle of the two round steel sections of the connecting joint test-piece at both ends, and connected with a 3817 dynamic strain indicator, respectively. A dial indicator is fixedly mounted on the gripper with standard length. The gripper and the second extensometer are mounted symmetrically up and down on the round steel at both ends of the connecting joint. The device has the advantages of practicality, simplicity, convenience, reliable counting and automatic collection of multipoint data in real time.
Description
Technical field
The present invention relates to the test figure automatic acquisition device, particularly relate to a kind of mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test.
Background technology
In recent years, the city high-rise building is in the ascendant, and is also high thereupon to the wind resistance shockproof requirements of super high rise building.For structure special requirement is arranged, be to adopt shaped steel to replace the xoncrete structure of reinforcing bar in the past, though this steel reinforced concrete structure can satisfy technical requirement, but can cause cost cost height unavoidably, the deficiency of aspects such as difficulty of construction is big and long in time limit is so people just attempt a kind ofly replacing reinforcing bar and shaped steel with super large footpath round steel.In fact, adopt super large footpath round steel day by day to become gesture as concrete column stiffness structure muscle in modern construction engineering, it is also imperative that the consumption of super large footpath round steel is increased the research that is connected with its structure.Adopt the stiffness structure muscle of super large footpath round steel as xoncrete structure, its MACHINERY JOINT becomes the key factor of Architectural Structure Design, processing and construction technology, and the interconnection technique level directly has influence on construction quality, speed of application, economic benefit and working security etc.Whether the quality of this interconnection technique satisfies Structural Design Requirement, must be through using after the assay was approved.Because the check that the jointing one-way type of super large footpath round steel stretches needs with the large-tonnage puller system and to the spacing between chuck and clamping length, chuck certain specific (special) requirements is arranged all.At present, the apparatus circle footpath maximum that can finish mechanical connecting joint of round steel with super-large diameter unilateral stretching type seizure test only is Φ 60, is difficult to satisfy the directly requirement of the jointing unilateral stretching type seizure test of round steel of Φ 75.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing test, a kind of large-tonnage pulling force is provided, can adorns the afterburning test device of solid major diameter and long test specimen, higher accuracy of measurement can be satisfied, the automatic data collection device of mechanical connecting joint of round steel with super-large diameter one directional tensile test can be realized.
Purpose of the present invention realizes by following proposal:
The mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test comprises afterburning frame, hold-doun nut, jointing test specimen, jointing, lifting jack, afterburning oil pump, oil pressure sensor, big displacement meter, first extensometer, second extensometer, anchor clamps, clock gauge, foil gauge, the one 2000 scale load measuring instrument, the 2 2000 scale load measuring instrument, the 3 2000 scale load measuring instrument, the 4 2000 scale load measuring instrument, 3817 dynamic strain indicators, first computing machine, second computing machine; Described afterburning frame comprises that four round steel are held in both hands and the steel plates of two band through holes; Two steel plates are positioned at two ends, hold in both hands by four round steel to connect; Described jointing test specimen is connected to form the round steel of two sections diameters more than or equal to 75mm by jointing; Described lifting jack is positioned at a side of afterburning frame, and the jointing test specimen passes the center pit of lifting jack and the through hole of afterburning frame successively, and its two ends are fastening by hold-doun nut; Lifting jack connects afterburning oil pump by oil pipe; Oil pressure sensor is installed in the You Zui position that lifting jack connects oil pipe, and is connected with the one 2000 scale load instrument; Two sections round steel section middle parts that a plurality of foil gauges stick on the middle part of jointing respectively and are positioned at the jointing test specimen at jointing two ends, a plurality of foil gauges connect 3817 dynamic strain indicators respectively, and 3817 dynamic strain indicators connect second computing machine; The body that the backguy end of big displacement meter is fixed on jack cylinder external part, big displacement meter is fixed on the afterburning frame, and big displacement meter is connected with the 2 2000 scale load instrument; Clock gauge peace is solid on the standard length anchor clamps, and the round steel that the anchor clamps and second extensometer are installed in the jointing two ends is symmetric position up and down, and second extensometer and the 4 2000 scale load instrument join; First extensometer is installed in jointing test specimen one side round steel middle part, and is connected with the 3 2000 scale load measuring instrument; The one 2000 scale load measuring instrument, the 2 2000 scale load measuring instrument, the 3 2000 scale load measuring instrument are connected with first computing machine respectively with the 4 2000 scale load measuring instrument.
For further realizing the object of the invention, described oil pressure sensor is selected CYY111 type oil pressure sensor for use.
Described lifting jack is a YCW-400 type lifting jack.
Described anchor clamps comprise opening annulus, short column and pole; Two with the fastening opening annulus top of screw be provided with the band small sircle hole short column, two short column center fixed have pole, clock gauge is fixed on an end of pole;
Described foil gauge is 6, stick on respectively two sections round steel middle parts of jointing test specimen along generatrix direction up and down symmetric position and jointing middle part along generatrix direction up and down on the symmetric position.
With respect to prior art, the present invention has following advantage and beneficial effect:
Advantages such as 1, apparatus of the present invention have simple structure, and spatial dimension is roomy, and load-bearing capacity is strong can satisfy the requirement of super large footpath round steel jointing unilateral stretching type seizure test;
2, afterburning frame of the present invention is horizontal horizontal type structure, and test specimen is in place, it is very convenient to adjust and change, can realize that test specimen is installed, debugging and dismounting victory just;
3, apparatus of the present invention are the test of multiple strain, displacement method and power value, can finish the function that real-time synchrodata is gathered and drawn automatically, realize that the single test multi-group data measures;
4, the instrument of apparatus of the present invention and method test each " physical quantity " and measuring system are for independent separately, and the accuracy of experimental test data is easy to improve, to satisfy the requirement of test.
Description of drawings
Fig. 1 is mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test and method synoptic diagram.
Fig. 2 is a foil gauge paste position synoptic diagram.
Fig. 3 is an afterburning shelf structure synoptic diagram among Fig. 1.
Fig. 4 is a clamp structure synoptic diagram among Fig. 1.
Illustrate among the figure: afterburning frame 1, hold-doun nut 2, jointing test specimen 3, jointing 4, lifting jack 5, afterburning oil pump 6, oil pressure sensor 7, big displacement meter 8, the first extensometer 9-1,9-2, anchor clamps 10, clock gauge 11, foil gauge 12, the one 2000 scale load measuring instrument 13-1, the 2 2000 scale load measuring instrument 13-2, the 3 2000 scale load measuring instrument 13-3, the 4 2000 scale load measuring instrument 13-4,3817 dynamic strain indicators 14, the first computing machine 15-1, the second computing machine 15-2.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples, but the scope of protection of present invention is not limited to the scope that embodiment represents.
As shown in Figure 1, the mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test comprises afterburning frame 1, hold-doun nut 2, jointing test specimen 3, jointing 4, lifting jack 5, afterburning oil pump 6, oil pressure sensor 7, big displacement meter 8, the first extensometer 9-1, the second extensometer 9-2, anchor clamps 10, clock gauge 11, foil gauge 12, the one 2000 scale load measuring instrument 13-1, the 2 2000 scale load measuring instrument 13-2, the 3 2000 scale load measuring instrument 13-3, the 4 2000 scale load measuring instrument 13-4,3817 dynamic strain indicators 14, the first computing machine 15-1, the second computing machine 15-2.Lifting jack 5 is positioned at the steel plate left side of afterburning frame 1, and jointing test specimen 3 passes lifting jack 5 center pits and afterburning frame 1 steel plate through hole successively, and fastening with hold-doun nut 2; The lifting jack 5 oil inlet pipe oil places of chewing are installed on oil pressure sensor 7, and oil pressure sensor 7 connects the first computing machine 15-1 by the one 2000 scale load measuring instrument 13-1, and the oil pipe of afterburning oil pump 6 connects lifting jack 5.As shown in Figure 2, multi-disc (6) foil gauge 12 sticks on respectively on the jointing test specimen 3, wherein: two sections round steel middle part upper and lower sides (along the generatrix direction upper and lower side) symmetry is pasted 4 foil gauges, jointing 4 middle part upper and lower sides (along the generatrix direction upper and lower side) symmetry is pasted 2 foil gauges, and each foil gauge 12 terminals connects the second computing machine 15-2 by 3817 dynamic strain indicators 14; The backguy end peace of big displacement meter 8 is solid at lifting jack 5 oil cylinder external parts, and its body partial fixing is on afterburning frame 1, and big displacement meter 8 connects the first computing machine 15-1 by the 2 2000 scale load measuring instrument 13-2; The standard length anchor clamps 10 and the second extensometer 9-2 symmetry that clock gauge 11 is housed are installed on the round steel at jointing 4 two ends, and the second extensometer 9-2 is connected with the first computing machine 15-1 by the 4 2000 scale load measuring instrument 13-4; The first extensometer 9-1 is installed in round steel middle part, jointing test specimen 3 left side, and is connected with the first computing machine 15-1 by the 3 2000 scale load measuring instrument 13-3.
As shown in Figure 3, afterburning frame 1 is a test unit carrying main framing, is with the steel plate of through holes to weld the bogey that is combined into by four round steel handfuls with two; Two steel plates are positioned at two ends, hold in both hands by four round steel to connect.
Hold-doun nut 2 is to be used for jointing test specimen 3 is fastened on afterburning frame 1, can select external diameter 120mm, length 100mm for use, the nut of endoporus M75 thread.Jointing test specimen 3 is subjects, by jointing 4 two sections 45A steel (as d=75mm) is had M75 * the fastening of 100 screw threads and forms, and effective length is that 3350mm (requires test specimen effective length L behind the one-tenth test specimen
2〉=L+8d=190+875=790mm).Jointing 4 has been connection effects, two sections round steel is connected, for 45A steel, length L=190mm, outside diameter of cylinder D=120mm, endoporus are M75 thread line.
Afterburning oil pump 6 is oil in the fuel tank to be added compress into lifting jack 5 oil cylinders formation oil pressure generation pulling force, can select ZB4-500 type oil pump for use, is produced by Liuzhou Ouweimu Machinery Co., Ltd.
The first extensometer 9-1 is the electronic type extensometer that the little variable of length is measured, and its gauge length is long can select the AWY200-25 type for use for 200mm, is produced by Changchun Aowei Precision Testing Equipment Co., Ltd..
The second extensometer 9-2 is the electronic type extensometer that the little variable of length is measured, and its gauge length is long can select the AWY500-25 type for use for 500mm, is produced by Changchun Aowei Precision Testing Equipment Co., Ltd..During installation, available bungee draws the bar pin with it and is fixed tightly on the round steel.
As shown in Figure 4, anchor clamps 10 are fitted with clock gauge 11, are to measure the interior length quantitative changeization of certain standard length distance.The anchor clamps gauge length should be L
1=L+4d, L are jointing length, and d is the round steel diameter, as L=190mm, d=75mm, i.e. L
1=490mm.Anchor clamps 10 are provided with the short column of being with small sircle hole by two fastening opening annulus, annulus tops of available screw, and the circular hole on the short column is used for fixing pole, and clock gauge 11 is fixed on an end of pole; During use, press L with screw
1Length requirement two annulus are fastened on respectively on the round steel of jointing test specimen stage casing (mid-span joint); Small sircle hole on the annulus short column is fixedly path 8mm pole and clock gauge respectively, and makes indicator roof pressure path pole end face (the about 2mm of indicator roof pressure journey amount).Clock gauge 11 is tool amounts of surveying length amount variable quantity, and journey is that 0～3mm, resolution are 0.001mm, is produced by Chengdu Chengliang Tools Group Co.,Ltd.
As shown in Figure 2, foil gauge 12 is that the measurement strain sticks on the primary element on the measured object.Foil gauge 12 sticks on two sections round steel middle parts of jointing test specimen (180 °) symmetric position (counting 4) and jointing 4 middle parts about generatrix direction respectively and (count 2) on (180 °) symmetric position about generatrix direction.Can select model for use is B * 120-100AA, and resolution is the resistance strain plate of 0.001mm, and factory produces by the two upright engineering sensor of Huangyan, Zhejiang.
The one 2000 scale load instrument 13-1, the 2 2000 scale load instrument, the 3 2000 scale load measuring instrument and the 4 2000 scale load instrument are the high-precision instruments of realizing that the input electric weight amplifies, quantizes and show, available model is 2000A, and great development in science and technology center, basic source, Beijing produces.
3817 dynamic strain indicators 14 are the instruments that are used to measure strain, and can select model for use is DH3817, is produced by Jiangsu Donghua Test Technology Co., Ltd..
It is X40 that the first computing machine 15-1 and the second computing machine 15-2 can select model for use, and IBM Corporation produces.
During test, earlier the one 2000 scale load measuring instrument 13-1, the 2 2000 scale load measuring instrument 13-2, the 3 2000 scale load measuring instrument 13-3 and the 4 2000 scale load measuring instrument 13-4 are arranged " zero-bit ".Then, start afterburning oil pump 6, regulate the inlet valve of afterburning oil pump 6, send fuel tank hydraulic oil to lifting jack 5 oil cylinders, lifting jack 5 work produce pulling force to jointing test specimen 3 under afterburning frame 1 counter-force carrying effect.Loading force carries from zero and adds to jointing test specimen 3 material yield strength standard value f
Yk0.6 times after, be offloaded to f
Yk0.02 times; Reload to f
Yk0.6 times; Repeat 3 times, concrete loading force process is: 0 → 0.6f
Yk→ 0.02f
Yk→ 0.6f
Yk→ 0.02f
Yk→ 0.6f
YkAfter this, be loaded on the test maximum pull and (be not less than material for test normal intensity value f
Uk).The collection of test data is: oil pressure sensor 7 transfers oil pressure " physical quantity " in lifting jack 5 oil cylinders to voltage, amplify, quantize through the high-precision electric weight of the one 2000 scale load measuring instrument 13-1, gather pulling force data, indicating value and drawing by the first computing machine 15-1, can finish measuring the load value of thrust; Big displacement meter 8 transfers the 3 stressed back distortion " physical quantity " of jointing test specimen to voltage, amplify, quantize through the high-precision electric weight of the 2 2000 scale load measuring instrument 13-2, gather deformation data, indicating value and drawing by the first computing machine 15-1, can finish measuring test specimen total deformation value; The first extensometer 9-1 transfers jointing test specimen 3 round steel sections distortion " physical quantity " to voltage, amplify, quantize through the high-precision electric weight of the 3 2000 scale load measuring instrument 13-3, gather round steel section deformation data, indicating value and drawing by the first computing machine 15-1, can finish measuring test specimen gauge length internal strain value; The second extensometer 9-2 transfers the distortion " physical quantity " in the jointing 4 gauge length sections to voltage, amplify, quantize through the high-precision electric weight of the 4 2000 scale load measuring instrument 13-4, gather jointing 4 gauge length section internal strain data, indicating value and drawing by the first computing machine 15-1, can finish the test specimen jointing gauge length section internal strain amount that measures; Multi-disc foil gauge 12 will be pasted position, place stressed back dependent variable " physical quantity " and transfer voltage to, measure this position strain value through 3817 dynamic strain indicators 14, by the second computing machine 15-2 gather the stressed strain data in the position of surveying, indicating value and drawing, can finish measuring the variate-value that jointing test specimen 3 is respectively pasted foil gauge 12 positions; Read the anchor clamps 10 elongation strain amount in the length of surveying by clock gauge 11, can measure set deformation volume in the jointing 4 gauge length sections.Each is measured image data and compiles (be multichannel " signal " defeated people's computing machine), finishes the single test synchrodata function of gathering and painting characteristic pattern (characteristic pattern of power and elongation, power and strain and power and total elongation) automatically in real time.
As mentioned above, just can realize the present invention preferably.
Claims (5)
1. the mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test is characterized in that: comprise afterburning frame, hold-doun nut, jointing test specimen, jointing, lifting jack, afterburning oil pump, oil pressure sensor, big displacement meter, first extensometer, second extensometer, anchor clamps, clock gauge, foil gauge, the one 2000 scale load measuring instrument, the 2 2000 scale load measuring instrument, the 3 2000 scale load measuring instrument, the 4 2000 scale load measuring instrument, 3817 dynamic strain indicators, first computing machine, second computing machine; Described afterburning frame comprises that four round steel are held in both hands and the steel plates of two band through holes; Two steel plates are positioned at two ends, hold in both hands by four round steel to connect; Described jointing test specimen is connected to form the round steel of two sections diameters more than or equal to 75mm by jointing; Described lifting jack is positioned at a side of afterburning frame, and the jointing test specimen passes the center pit of lifting jack and the through hole of afterburning frame successively, and its two ends are fastening by hold-doun nut; Lifting jack connects afterburning oil pump by oil pipe; Oil pressure sensor is installed in the You Zui position that lifting jack connects oil pipe, and is connected with the one 2000 scale load instrument; Two sections round steel section middle parts that a plurality of foil gauges stick on the middle part of jointing respectively and are positioned at the jointing test specimen at jointing two ends, a plurality of foil gauges connect 3817 dynamic strain indicators respectively, and 3817 dynamic strain indicators connect second computing machine; The body that the backguy end of big displacement meter is fixed on jack cylinder external part, big displacement meter is fixed on the afterburning frame, and big displacement meter is connected with the 2 2000 scale load instrument; Clock gauge peace is solid on the standard length anchor clamps, and the round steel that the anchor clamps and second extensometer are installed in the jointing two ends is symmetric position up and down, and second extensometer and the 4 2000 scale load instrument join; First extensometer is installed in jointing test specimen one side round steel middle part, and is connected with the 3 2000 scale load measuring instrument; The one 2000 scale load measuring instrument, the 2 2000 scale load measuring instrument, the 3 2000 scale load measuring instrument are connected with first computing machine respectively with the 4 2000 scale load measuring instrument.
2. mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test according to claim 1 is characterized in that: described oil pressure sensor is selected CYY111 type oil pressure sensor for use.
3. mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test according to claim 1 and method is characterized in that: described lifting jack is a YCW-400 type lifting jack.
4. mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test according to claim 1 is characterized in that: described anchor clamps comprise opening annulus, short column and pole; Two with the fastening opening annulus top of screw be provided with the band small sircle hole short column, two short column center fixed have pole, clock gauge is fixed on an end of pole;
5. mechanical connecting joint of round steel with super-large diameter automatic data collection device for unidirectional tension test according to claim 1, it is characterized in that: described foil gauge is 6, stick on respectively two sections round steel middle parts of jointing test specimen along generatrix direction up and down symmetric position and jointing middle part along generatrix direction up and down on the symmetric position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101310238A CN101806688B (en) | 2010-03-19 | 2010-03-19 | Unidirectional tension test device of super-large diameter round bar machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101310238A CN101806688B (en) | 2010-03-19 | 2010-03-19 | Unidirectional tension test device of super-large diameter round bar machine |
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| Publication Number | Publication Date |
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| CN101806688A true CN101806688A (en) | 2010-08-18 |
| CN101806688B CN101806688B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101310238A Expired - Fee Related CN101806688B (en) | 2010-03-19 | 2010-03-19 | Unidirectional tension test device of super-large diameter round bar machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149094A (en) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | Measuring method and device for tensile creep of early-age concrete |
| CN103308300A (en) * | 2013-06-06 | 2013-09-18 | 北京大学 | Buffer device for super-heavy-load tensile tester |
| CN106840885A (en) * | 2017-03-29 | 2017-06-13 | 湖北武大珞珈工程结构检测咨询有限公司 | A kind of large-tonnage horizontal tensile testing machine |
| CN110631910A (en) * | 2019-09-27 | 2019-12-31 | 福州大学 | Fire test testing device and method for prestressed steel strand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20010037550A (en) * | 1999-10-18 | 2001-05-15 | 정생규 | Relaxation tester for Prestressed Concrete steel wire and strand |
| CN2674430Y (en) * | 2003-03-25 | 2005-01-26 | 上海华龙测试仪器有限公司 | Microcomputer controlled electronic universal tester |
| CN2761735Y (en) * | 2004-10-18 | 2006-03-01 | 钱冠龙 | Joining structure of reinforced bar |
-
2010
- 2010-03-19 CN CN2010101310238A patent/CN101806688B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010037550A (en) * | 1999-10-18 | 2001-05-15 | 정생규 | Relaxation tester for Prestressed Concrete steel wire and strand |
| CN2674430Y (en) * | 2003-03-25 | 2005-01-26 | 上海华龙测试仪器有限公司 | Microcomputer controlled electronic universal tester |
| CN2761735Y (en) * | 2004-10-18 | 2006-03-01 | 钱冠龙 | Joining structure of reinforced bar |
Non-Patent Citations (1)
| Title |
|---|
| 《科学技术与工程》 20091130 王涛等 超大径圆钢机械连接接头试验研究 6571-6575 1-5 第9卷, 第21期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149094A (en) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | Measuring method and device for tensile creep of early-age concrete |
| CN103308300A (en) * | 2013-06-06 | 2013-09-18 | 北京大学 | Buffer device for super-heavy-load tensile tester |
| CN103308300B (en) * | 2013-06-06 | 2016-01-20 | 北京大学 | Buffer device for super-heavy-load tensile tester |
| CN106840885A (en) * | 2017-03-29 | 2017-06-13 | 湖北武大珞珈工程结构检测咨询有限公司 | A kind of large-tonnage horizontal tensile testing machine |
| CN110631910A (en) * | 2019-09-27 | 2019-12-31 | 福州大学 | Fire test testing device and method for prestressed steel strand |
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| CN101806688B (en) | 2011-06-22 |
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