CN104713691B - Device for exerting axis-compression ratio and fixing test specimen for structural seismic performance test and testing method for device - Google Patents
Device for exerting axis-compression ratio and fixing test specimen for structural seismic performance test and testing method for device Download PDFInfo
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- CN104713691B CN104713691B CN201510170717.5A CN201510170717A CN104713691B CN 104713691 B CN104713691 B CN 104713691B CN 201510170717 A CN201510170717 A CN 201510170717A CN 104713691 B CN104713691 B CN 104713691B
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000007906 compression Methods 0.000 title claims abstract description 31
- 238000011056 performance test Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 66
- 239000010959 steel Substances 0.000 claims abstract description 66
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000005452 bending Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- 241000233855 Orchidaceae Species 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000007405 data analysis Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000011017 operating method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention relates to a device for exerting an axis-compression ratio and fixing a test specimen for a structural seismic performance test and a testing method for the device, and belongs to the domain of structural test research. The device is composed of three parts, namely an axis-compression ratio exerting system, a test specimen earth anchor fixing system and an axial compression eccentric adjustment system, wherein the axis-compression ratio exerting system is composed of a first channel-section steel plate, a second channel-section steel plate, an opposite-pull screw rod, positioning nuts for channel-section steel plates, fixing nuts and an anti-bending steel base plate; and the test specimen earth anchor fixing system is composed of an anchor channel-section steel plate, an earth anchor rock bolt, an earth anchor nut and a steel base plate in the test specimen earth anchor fixing system. By virtue of the device and the method provided by the invention, the test specimen is convenient to dismantle and fix; hoisting equipment does not need to be arranged during equipment installation; the positioning accuracy is high; the load exerting position is small in error; and the device and the method are suitable for experiment performance research on members such as columns, walls, and frame, on which vertical and horizontal loads simultaneously act.
Description
Technical field
The present invention relates to a kind of axial compression ratio of structural seismic performance test applies and test piece fixing device and its test method,
It is mainly used in the Experimental Study on Seismic Behavior of various concrete columns, body of wall, framework, dress is fixed in the loading for belonging to a kind of indoor model test
Put.
Background technology
China is an earthquake-prone countries, and the research of scholar and research institution to structural seismic performance is more and more, this
Wherein need to carry out substantial amounts of experimental study, including the anti-seismic performance research such as post, wall, framework.In Experimental Study on Seismic Behavior, frequently with
Low-cycle Test, pseudo, these tests are all that simultaneously effect has vertical load and horizontal loading.
Test specimen is fixed with following methods in experiment：
（1）The preformed hole in the middle of the fixed beam of bottom, earth anchor screw rod is passed through from preformed hole, and top is entered using cushion block and nut
Row anchoring, the method is in addition to preformed hole increases test specimen manufacture difficulty, and bottom fixed beam size is larger, must be by two ends ground during positioning
Anchor screw rod is accurately penetrated in preformed hole, installs inconvenient.When needing to adjust test specimen position, affected by earth anchor screw rod, operated
Also it is more difficult.
（2）Anchored using press beam method, the larger girder steel of test specimen two ends two rigidity of need, prepared screw-bolt hole on girder steel,
It is fixed by four ground anchor bolts.The method press beam needs to be mounted and dismounted by crane gear from great, constructs
Inconvenience.
Axial compression ratio applies conventional method in experiment is：Coaster is installed under experiment steelframe upper beam, as jack
The reaction support of applying, jack bottom and test specimen top contact, to be further applied load.During test, when test specimen top occurred level
During displacement, coaster slides on steelframe, to ensure that it is additional reversely eccentric that axle pressure is not produced.The method coaster high cost, test
The coefficient of friction of middle coaster affects larger to test.Particularly when test specimen occurs bending and deformation, test specimen top surface produces small turn
Angle, causes jack discontinuity, is easily caused jack and force snesor is damaged.
Affected by test specimen machining accuracy, ground and upper beam horizontal gradient error, it is larger that axial force applies possible generation
Bias, conventional method is difficult to be adjusted.
The content of the invention
The purpose of the present invention is to overcome drawbacks described above, designs a kind of test specimen handling and is fixed conveniently, and structure is novel to be added
Loaded securement device.
To solve above-mentioned technical problem, the technical scheme is that：
A kind of axial compression ratio of structural seismic performance test applies and test piece fixing device, and device includes：
Axial compression ratio for carrying out axial compressive force test to test specimen applies system；Including the first troughing plate, the second flute profile
Steel plate, Screw arbor with nut at both-ends, location nut, fixing nut, band arc groove steel plate, force snesor, jack and bending resistance billet；Its
In, the both wings of first troughing plate and the second troughing plate are respectively provided with horizontal segment, screw are reserved on horizontal segment, by drawing
Screw rod, location nut and fixing nut will be relatively fixed between first troughing plate and the second troughing plate, the second flute profile
Steel plate to be sequentially placed between first troughing plate test specimen, billet, jack, force snesor and band arc groove steel
Plate；
For the earth anchorage system being fixed on the bottom of test specimen on grade beam；The system includes being symmetricly set on test specimen bottom
Two groups of fixation kits of portion both sides, per group includes earth anchor grooved steel plate, earth anchor anchor pole, earth anchor nut and bending resistance billet；Wherein,
The grade beam is provided with the vertical channel passed through for the earth anchor anchor pole, is reserved on the earth anchor grooved steel plate both wings horizontal segment
The screwed hole that earth anchor anchor pole is passed through；The test specimen is by earth anchor grooved steel plate, earth anchor anchor pole and earth anchor nut and the grade beam phase
To fixation；
Also include axle pressure bias adjustment system, for applying system to the axial compression ratio eccentric adjustment is carried out；It is described
Symmetrically arranged two suspension ring are welded with first grooved steel plate, on two earth anchor grooved steel plates a steel is respectively equipped with
Ring, two China's orchid bolts connect respectively suspension ring and steel loop.
Further, the test piece lower part is reserved for the groove that second troughing plate is passed through.
Further, the both wings horizontal segment of first troughing plate, the both wings horizontal segment of the second troughing plate and earth anchor
The diameter that bending resistance billet, the Screw arbor with nut at both-ends and earth anchor anchor pole are respectively arranged with the both wings horizontal segment of grooved steel plate is not less than
25mm。
A kind of axial compression ratio tested using the structural seismic performance is applied and test piece fixing device carries out loading fixation
Method, including following step：
The first step：First earth anchor anchor pole is placed under grade beam, then earth anchor grooved steel plate is placed on the base of test specimen, make earth anchor
Preformed hole of the anchor pole through horizontal segment on troughing plate both wings；
Second step：Successively bending resistance billet and earth anchor nut are put in earth anchor troughing plate both wings horizontal segment, by tightening
Nut is fixed；Earth anchor grooved steel plate bottom both wings horizontal segment is 2～3cm with ground initial distance, with ground after deformation
Identity distance is from not less than 3mm；
3rd step：It is respectively welded steel loop, suspension ring on earth anchor grooved steel plate, the first troughing plate in advance；
4th step：It is interim that China's orchid bolt is installed, the first flute profile in axial compression ratio applying system is realized by adjustment China orchid screw
The eccentric adjustment of steel plate；
Further, the small horizontal displacement to test piece base in process of the test is tested using dial gauge, data
Introduce the horizontal displacement small to test specimen of displacement coefficient method during analysis to be modified.
Advantages of the present invention and effect：
A kind of new axial compression ratio of the present invention applies system, test specimen earth anchorage system and axle pressure bias adjustment system, its
Rational in infrastructure, simple structure is easy to use；Compared with traditional experimental method, the present invention uses bolt connection, easy to loading and unloading, saves
Material, low cost, effect is significant.
In addition, present configuration is solved install under big rigidity girder steel roller support applying axial compression ratio and using the side such as press beam
Method fixes some shortcomings that test piece base is present, and has larger application prospect in terms of the test of research structure anti-seismic performance.
Description of the drawings
Fig. 1-post test specimen axial compression ratio of the present invention applies, test piece base is anchored and vertical load off-center adjustment apparatus schematic diagram；
The uniform vertical force of Fig. 2-of the present invention body of wall applies and test piece base anchor schematic diagram；
Fig. 3-post test specimen axial compression ratio of the present invention applies generalized section；
Fig. 4-band arc groove steel plain and generalized section；
Fig. 5-test specimen earth anchorage system generalized section of the present invention；
Wherein troughing plates of 1- first, the troughing plates of 2- second, 3- Screw arbor with nut at both-ends, 4- location nuts, 5- fixing nuts, 6-
Bending resistance billet, 7- band groove steel plates, 8- force snesors, 9- jack, 10- test specimens, 11- billets, 12- test specimen grooves, 13-
Earth anchor grooved steel plate, 14- earth anchor anchor poles, 15- earth anchor nuts, 16- steel loops, 17- suspension ring, 18- China orchid bolt.
Specific embodiment
Below in conjunction with the accompanying drawings 1 the present invention is described further：
As shown in figure 1, a kind of axial compression ratio of structural seismic performance test applies and test piece fixing device, device includes axle pressure
Than applying system, test specimen earth anchorage system and axle pressure bias adjustment system；
Axial compression ratio applies system includes the first troughing plate 1, the second troughing plate 2, Screw arbor with nut at both-ends 3, location nut 4, solid
Determine nut 5, bending resistance billet 6, band arc groove steel plate 7, force snesor 8, jack 9 and test specimen 10；Wherein, the test specimen 10
Bottom is reserved for the groove 12 that second troughing plate 2 is passed through, and the two of the troughing plate 2 of first troughing plate 1 and second
The wing is respectively provided with horizontal segment, screw is reserved on horizontal segment, by Screw arbor with nut at both-ends 3, location nut 4 and fixing nut 5 by described first
The troughing plate 2 of troughing plate 1 and second is fixed, and is set gradually between the top of the test specimen 10 and first troughing plate 1
There are billet 11, jack 9, force snesor 8 and band arc groove steel plate 7；
Test specimen earth anchorage system is by 6 groups of earth anchor grooved steel plate 13, earth anchor anchor pole 14, earth anchor nut 15 and bending resistance billet
Into.
Axle pressure bias adjustment system by axle pressure apply system the first grooved steel plate 1 on weld suspension ring 17,
The steel loop 16 welded on anchor grooved steel plate 13 and the China's orchid bolt composition being hooked between steel loop 16 and suspension ring 17.
Wherein：Axial compression ratio applies the operating procedure of system：
The first step：First the second troughing plate 2 in axial compression ratio applying system is placed on into specified location, test specimen 10 is placed on into
Above two troughing plates 2, the second troughing plate 2 is set to snap in the reserved groove 12 of test specimen 10；
Second step：Location nut 4 is first screwed into the specified location of Screw arbor with nut at both-ends 3, makes before and after Screw arbor with nut at both-ends 3 be located at positioning spiral shell
Length between female 4 is identical, then Screw arbor with nut at both-ends 3 is penetrated in the reserved screw of the second troughing plate 2, is sequentially placed into bending resistance steel pad
Plate 6 and fixing nut 5, tighten fixing nut 5 and fix bottom；
3rd step：The first troughing plate 1 is put into, then is sequentially placed into bending resistance billet 6 and fixing nut 5, tightening nut 5 will
Top is fixed；
4th step：Billet 11 between jack 9 and test specimen 10, jack 9, force snesor 8 are successively placed on into test specimen
10 end, by jack 9 applying of axial compression ratio is realized.
The operating procedure of test specimen earth anchorage system is：
Step a：First earth anchor anchor pole 14 is placed under grade beam, then earth anchor grooved steel plate 13 is placed on the base of test specimen 10, made
Earth anchor anchor pole 14 is through the preformed hole on earth anchor grooved steel plate 13；
Step b：Successively bending resistance billet 6 and earth anchor nut 15 are put in the both wings horizontal segment of earth anchor grooved steel plate 13, are passed through
Tighten nut 15 to be fixed.
The operating procedure of axle pressure bias adjustment system is：
Step c：Weld steel loop 16 on earth anchor grooved steel plate 13 in advance, weld on the first troughing plate 1 steel loop 16；
Step d：It is interim that China's orchid bolt 18 is installed, the eccentric adjustment of the first troughing plate 1 is realized by adjustment China orchid screw.
The concrete preparation method of apparatus of the present invention is illustrated below in conjunction with the accompanying drawings：
Step（1）：The second troughing plate 2 is should be greater than when making test specimen in the reserved groove 12 in its underpart, the depth of groove
Thickness 2mm, width 5mm more than of the width more than the second troughing plate 2；
Step（2）：The first troughing plate 1, the second troughing plate 2 and earth anchorage body in making axial compression ratio applying system
Earth anchor grooved steel plate 13 in system, its thickness of above-mentioned troughing plate is not less than 25mm；When making above-mentioned troughing plate, first
Troughing plate 1, the both wings horizontal segment of the second troughing plate 2 reserve respectively the hole of Screw arbor with nut at both-ends 3, the two of earth anchor grooved steel plate 13
The hole of the reserved earth anchor anchor pole 14 of wing horizontal segment；
Step（3）：Band arc groove steel plate 7 is made, its thickness is not less than 25mm.Reserve in its underpart middle position recessed
Groove, slightly in the end diameter of force snesor 8, depth is not less than 5mm to groove internal diameter, as shown in Figure 4；
Step（4）：Bending resistance billet 6 is made, thickness is not less than 20mm, and width is not less than 15mm.The thickness of billet 11 is not
Less than 5mm；
Step（5）：In band arc groove steel plate 7 described in the lower weld of the first troughing plate 1；
Step（6）：Making the diameter of Screw arbor with nut at both-ends 3 and earth anchor anchor pole 14, Screw arbor with nut at both-ends 3 and earth anchor anchor pole 14 should be not less than
25mm, screw rod two ends and anchor pole end carry out cutting thread process；
Step（7）：Suspension ring 16 and steel loop 17 are respectively welded on the first troughing plate 1 and earth anchor grooved steel plate 13；
Step（8）：It is interim that China's orchid bolt 18 is installed.
Claims (5)
1. a kind of axial compression ratio of structural seismic performance test applies and test piece fixing device, it is characterised in that：Device includes：
For to test specimen（10）The axial compression ratio for carrying out axial compressive force test applies system；Including the first troughing plate（1）, the second groove
Shape steel plate（2）, Screw arbor with nut at both-ends（3）, location nut（4）, fixing nut（5）, bending resistance billet（6）, band arc groove steel plate
（7）, force snesor（8）, jack（9）And billet（11）；Wherein, first troughing plate（1）With the second troughing plate
（2）Both wings be respectively provided with horizontal segment, on horizontal segment reserve screw, by Screw arbor with nut at both-ends（3）, location nut（4）And fixing nut
（5）By first troughing plate（1）With the second troughing plate（2）Between be relatively fixed, the second troughing plate（2）To described the
One troughing plate（1）Between be sequentially placed test specimen（10）, billet（11）, jack（9）, force snesor（8）It is recessed with band circular arc
Channel-section steel plate（7）；
For by test specimen（10）Bottom be fixed on earth anchorage system on grade beam；The system includes being symmetricly set on test specimen
（10）Two groups of fixation kits of two bottom sides, per group includes earth anchor grooved steel plate（13）, earth anchor anchor pole（14）, bending resistance billet
（6）And earth anchor nut（15）；Wherein, the grade beam is provided with for the earth anchor anchor pole（14）The vertical channel for passing through, describedly
Anchor grooved steel plate（13）Earth anchor anchor pole is reserved on both wings horizontal segment（14）The screwed hole for passing through；The test specimen（10）By earth anchor
Grooved steel plate（13）, earth anchor anchor pole（14）And earth anchor nut（15）It is relatively fixed with the grade beam；
Also include axle pressure bias adjustment system, for applying system to the axial compression ratio eccentric adjustment is carried out；Described first
Grooved steel plate（1）Two suspension ring of upper welding（17）, the earth anchor grooved steel plate（13）It is provided with steel loop（16）, China's orchid bolt（18）
Connection suspension ring（17）And steel loop（16）.
2. the axial compression ratio of structural seismic performance test according to claim 1 applies and test piece fixing device, and its feature exists
In：The test specimen（10）Bottom is reserved for second troughing plate（2）The groove for passing through（12）.
3. the axial compression ratio of structural seismic performance test according to claim 1 applies and test piece fixing device, and its feature exists
In：First troughing plate（1）Both wings horizontal segment, the second troughing plate（2）Both wings horizontal segment and earth anchor grooved steel plate
（13）Both wings horizontal segment on be respectively arranged with bending resistance billet（6）, the Screw arbor with nut at both-ends（3）With earth anchor anchor pole（14）Diameter
Not less than 25mm.
4. the axial compression ratio of structural seismic performance test applies and test specimen is consolidated described in any one in a kind of utilization claim 1～3
Determining device carries out loading fixed method, it is characterised in that：Including following step：
The first step：First by earth anchor anchor pole（14）Under being placed on grade beam, then by earth anchor grooved steel plate（13）It is placed on test specimen（10）Base
On, make earth anchor anchor pole（14）Through earth anchor troughing plate（13）The preformed hole of horizontal segment on both wings；
Second step：Successively in earth anchor troughing plate（13）Both wings horizontal segment is put into bending resistance billet（6）With earth anchor nut（15）, lead to
Cross and tighten nut and be fixed；The earth anchor grooved steel plate（13）Bottom both wings horizontal segment is 2～3cm with ground initial distance,
It is not less than 3mm with ground distance after deformation；
3rd step：In advance in earth anchor grooved steel plate（13）, the first troughing plate（1）On be respectively welded steel loop（16）, suspension ring（17）；
4th step：It is interim that China's orchid bolt is installed（18）, the first flute profile in axial compression ratio applying system is realized by adjustment China orchid screw
Steel plate（1）Eccentric adjustment.
5. the axial compression ratio of structural seismic performance test according to claim 4 applies and test piece fixing device carries out loading admittedly
Fixed method, it is characterised in that：To test specimen in process of the test（10）The small horizontal displacement of base is surveyed using dial gauge
Examination, introduces the horizontal displacement small to test specimen of displacement coefficient method and is modified during data analysis.
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| CN201510170717.5A CN104713691B (en) | 2015-04-10 | 2015-04-10 | Device for exerting axis-compression ratio and fixing test specimen for structural seismic performance test and testing method for device |
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| CN201510170717.5A CN104713691B (en) | 2015-04-10 | 2015-04-10 | Device for exerting axis-compression ratio and fixing test specimen for structural seismic performance test and testing method for device |
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| CN105865734B (en) * | 2016-04-28 | 2018-07-20 | 福州大学 | Loading device for testing seismic performance of reinforced concrete bridge piers and application method |
| CN106092476B (en) * | 2016-06-14 | 2018-12-14 | 河海大学 | Civil engineering structure shock test device |
| CN109580265A (en) * | 2018-11-22 | 2019-04-05 | 北京建筑大学 | A kind of I-shaped wall pseudo-static experimental loading frame and its application method |
| CN111307584B (en) * | 2019-11-22 | 2021-09-24 | 浙江大学 | Auxiliary device for right-angle component mechanical loading test and test device |
| CN111413224A (en) * | 2020-05-18 | 2020-07-14 | 上海工程技术大学 | Explosion test reaction frame device capable of applying axial pressure to bridge pier stud |
| CN111751226A (en) * | 2020-07-06 | 2020-10-09 | 华侨大学 | Testing device for bending resistance, bearing capacity and deformation performance of rammed soil and wood beam node and using method thereof |
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