CN104713691A - 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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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 238000007906 compression Methods 0.000 title claims abstract description 31
- 238000011056 performance test Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 5
- 239000011435 rock Substances 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 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 axial compression ratio that the present invention relates to the test of a kind of structural seismic performance applies and test piece fixing device and test method thereof, and be mainly used in the Experimental Study on Seismic Behavior of various concrete column, body of wall, framework, what belong to a kind of indoor model test adds loaded securement device.
Background technology
China is an earthquake-prone countries, and scholar and the research institution research to structural seismic performance gets more and more, and this wherein needs to carry out a large amount of experimental studies, comprises the anti-seismic performance researchs such as post, wall, framework.In Experimental Study on Seismic Behavior, often adopt Low-cycle Test, pseudo, these tests are all acted on vertical load and horizontal loading simultaneously.
In experiment, test specimen is fixed with following methods:
(1) preformed hole in the middle of the fixed beam of bottom, earth anchor screw rod passes from preformed hole, top adopts cushion block and nut to carry out anchoring, the method is except preformed hole increases test specimen manufacture difficulty, bottom fixed beam size is larger, two ends earth anchor screw rod accurately must be penetrated in preformed hole during location, install inconvenient.When needing adjustment test specimen position, be subject to the impact of earth anchor screw rod, operation is also comparatively difficult.
(2) adopt pressure beam method to carry out anchoring, test specimen two ends need the girder steel that two rigidity is larger, and prepared screw-bolt hole on girder steel, is fixed by four ground anchor bolts.The method pressure beam, from great, needs to mount and dismount by hoisting device, construction inconvenience.
The method that in experiment, axial compression ratio applies to commonly use is: under experiment steelframe upper beam, install coaster, as the reaction support that lifting jack applies, lifting jack bottom and test specimen top contact, with load application.During test, when the occurred level displacement of test specimen top, coaster slides on steelframe, additional oppositely eccentric to ensure that axial pressure does not produce.The method coaster cost is high, and in test, the friction factor of coaster is larger on test impact.Particularly when test specimen occurs bending and deformation, test specimen end face produces micro-corner, causes lifting jack discontinuity, easily causes lifting jack and force snesor to be damaged.
Be subject to test specimen machining precision, ground and the impact of upper beam horizontal gradient error, axial force applies to produce comparatively large eccentricity, and conventional method is difficult to be adjusted.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, design a kind of test specimen handling and convenient fixing, novel structure add loaded securement device.
For solving the problems of the technologies described above, technical scheme of the present invention is:
The axial compression ratio of structural seismic performance test applies and a test piece fixing device, and device comprises:
Axial compression ratio for carrying out axle pressure test to test specimen applies system; Comprise the first troughing plate, the second troughing plate, Screw arbor with nut at both-ends, setscrew nut, hold-down nut, band arc groove steel plate, force snesor, lifting jack and billet; Wherein, the both wings of described first troughing plate and the second troughing plate all have horizontal segment, reserved screw on horizontal segment, by Screw arbor with nut at both-ends, setscrew nut and hold-down nut by relatively fixing between described first troughing plate and the second troughing plate, between the second troughing plate to described first troughing plate, place test specimen, billet, lifting jack, force snesor and band arc groove steel plate successively;
For the bottom of test specimen being fixed on the earth anchorage system on grade beam; This system comprises the two groups of fixation kits being symmetricly set on test specimen two bottom sides, and often group comprises earth anchor grooved steel plate, earth anchor anchor pole, earth anchor nut and billet; Wherein, described grade beam is provided with the vertical channel passed for described earth anchor anchor pole, the reserved threaded hole passed for earth anchor anchor pole on described earth anchor grooved steel plate both wings horizontal segment; Described test specimen is relative with described grade beam fixing by earth anchor grooved steel plate, earth anchor anchor pole and earth anchor nut;
Also comprise the eccentric adjustment system of an axial pressure, carry out bias adjustment for applying system to described axial compression ratio; Described first grooved steel plate is welded with symmetrically arranged two suspension ring, and two described earth anchor grooved steel plates are respectively equipped with a steel loop, and two blue bolts of China connect suspension ring and steel loop respectively.
Further, described test piece lower part reserves the groove passed for described second troughing plate.
Further, the both wings horizontal segment of the both wings horizontal segment of described first troughing plate, the both wings horizontal segment of the second troughing plate and earth anchor grooved steel plate is respectively arranged with bending resistance billet, and the diameter of described Screw arbor with nut at both-ends and earth anchor anchor pole is not less than 25mm.
The axial compression ratio utilizing described structural seismic performance to test applies and test piece fixing device carries out loading a fixing method, comprises following step:
The first step: under first earth anchor anchor pole being placed on grade beam, then earth anchor grooved steel plate is placed on the base of test specimen, make earth anchor anchor pole through the preformed hole of horizontal segment on troughing plate both wings;
Second step: put into ground anchoring billet and earth anchor nut at troughing plate both wings horizontal segment successively, be fixed by fastening nut; Described earth anchor grooved steel plate bottom both wings horizontal segment and ground initial distance are 2 ~ 3cm, distortion after and ground distance be not less than 3mm;
3rd step: weld steel loop, suspension ring respectively in advance on earth anchor grooved steel plate, the first troughing plate;
4th step: the magnificent blue bolt of interim installation, realizes the bias adjustment of the first troughing plate in axial compression ratio applying system by adjusting magnificent blue screw;
Further, in process of the test, adopt dial gauge to test to the small horizontal shift of test piece base, the horizontal shift of introducing displacement coefficient method small to test specimen during data analysis is revised.
Advantage of the present invention and effect:
A kind of Novel shaft pressure ratio of the present invention applies the eccentric adjustment system of system, test specimen earth anchorage system and axial pressure, and it is rational in infrastructure, simple structure, easy to use; Compare with traditional experimental method, the present invention uses bolt to connect, easy to loading and unloading, and save material, cost is low, Be very effective.
In addition, structure of the present invention installs the some shortcomings that roller support applies axial compression ratio and adopt the methods such as pressure beam to fix test piece base to exist under solving large rigidity girder steel, in the test of research structure anti-seismic performance, have larger application prospect.
Accompanying drawing explanation
Fig. 1-post test specimen axial compression ratio applying of the present invention, test piece base anchoring and vertical load off-center adjustment apparatus schematic diagram;
The uniform vertical force of Fig. 2-body of wall of the present invention applies and test piece base anchor schematic diagram;
Fig. 3-post test specimen axial compression ratio of the present invention applies diagrammatic cross-section;
Fig. 4-band arc groove steel plain and diagrammatic cross-section;
Fig. 5-test specimen earth anchorage system diagrammatic cross-section of the present invention;
Wherein 1-first troughing plate, 2-second troughing plate, 3-Screw arbor with nut at both-ends, 4-setscrew nut, 5-hold-down nut, 6-bending resistance billet, 7-is with groove steel plate, 8-force snesor, 9-lifting jack, 10-test specimen, 11-billet, 12-test specimen groove, 13-earth anchor grooved steel plate, 14-earth anchor anchor pole, 15-earth anchor nut, 16-steel loop, 17-suspension ring, the blue bolt of 18-China.
Embodiment
Below in conjunction with accompanying drawing 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, and device comprises axial compression ratio and applies the eccentric adjustment system of system, test specimen earth anchorage system and axial pressure;
Axial compression ratio applies system and comprises the first troughing plate 1, second troughing plate 2, Screw arbor with nut at both-ends 3, setscrew nut 4, hold-down nut 5, bending resistance billet 6, band arc groove steel plate 7, force snesor 8, lifting jack 9 and test specimen 10; Wherein, the groove 12 passed for described second troughing plate 2 is reserved in described test specimen 10 bottom, the both wings of described first troughing plate 1 and the second troughing plate 2 all have horizontal segment, reserved screw on horizontal segment, by Screw arbor with nut at both-ends 3, setscrew nut 4 and hold-down nut 5, described first troughing plate 1 and the second troughing plate 2 are fixed, be disposed with billet 11, lifting jack 9, force snesor 8 and be with arc groove steel plate 7 between the top of described test specimen 10 and described first troughing plate 1;
Test specimen earth anchorage system is made up of earth anchor grooved steel plate 13, earth anchor anchor pole 14, earth anchor nut 15 and bending resistance billet 6.
The eccentric adjustment system of axial pressure is made up of the steel loop 16 applying the first grooved steel plate 1 of system welds respectively at axial pressure, suspension ring 17 and the blue bolt of China be hooked between steel loop 16 and suspension ring 17.
Wherein: the operation steps that axial compression ratio applies system is:
The first step: first the second troughing plate 2 in axial compression ratio applying system is placed on assigned address, is placed on by test specimen 10 above second troughing plate 2, makes the second troughing plate 2 snap in the reserved groove 12 of test specimen 10;
Second step: the assigned address first setscrew nut 4 being screwed into Screw arbor with nut at both-ends 3, make the length of front and back Screw arbor with nut at both-ends 3 between setscrew nut 4 identical, again Screw arbor with nut at both-ends 3 is penetrated in the reserved screw of the second troughing plate 2, put into bending resistance billet 6 and hold-down nut 5 successively, tighten hold-down nut 5 and bottom is fixed;
3rd step: put into the first troughing plate 1, then put into bending resistance billet 6 and hold-down nut 5 successively, top is fixed by fastening nut 5;
4th step: the end billet 11 between lifting jack 9 and test specimen 10, lifting jack 9, force snesor 8 being successively placed on test specimen 10, realizes the applying of axial compression ratio by lifting jack 9.
The operation steps of test specimen earth anchorage system is:
Step a: under first earth anchor anchor pole 14 being placed on grade beam, then earth anchor grooved steel plate 13 is placed on test specimen 10 base, make earth anchor anchor pole 14 through the preformed hole on earth anchor grooved steel plate 13;
Step b: put into bending resistance billet 6 and earth anchor nut 15 at earth anchor grooved steel plate 13 both wings horizontal segment successively, be fixed by fastening nut 15.
The operation steps of the eccentric adjustment system of axial pressure is:
Step c: weld steel loop 16, suspension ring 17 respectively in advance on earth anchor grooved steel plate 13, first troughing plate 1;
Steps d: the magnificent blue bolt 18 of interim installation, realizes the bias adjustment of the first troughing plate 1 by adjusting magnificent blue screw.
The concrete method for making of apparatus of the present invention is described below in conjunction with accompanying drawing:
Step (1): reserve groove 12 in its underpart when making test specimen, the degree of depth of groove should be greater than the thickness 2mm of the second troughing plate 2, and width is greater than more than the width 5mm of the second troughing plate 2;
Step (2): make the first troughing plate 1, second troughing plate 2 in axial compression ratio applying system and the earth anchor grooved steel plate 13 in earth anchorage system, its thickness of above-mentioned troughing plate is not less than 25mm; When making above-mentioned troughing plate, reserve the hole of Screw arbor with nut at both-ends 3 at the both wings horizontal segment of the first troughing plate 1, second troughing plate 2 respectively, reserve the hole of earth anchor anchor pole 14 at the both wings horizontal segment of earth anchor grooved steel plate 13;
Step (3): make band arc groove steel plate 7, its thickness is not less than 25mm.Reserve groove in position, middle, its underpart, groove internal diameter is slightly in force snesor 8 end diameter, and the degree of depth is not less than 5mm, as shown in Figure 4;
Step (4): make bending resistance bending resistance billet 6, thickness is not less than 20mm, and width is not less than 15mm.Billet 11 thickness is not less than 5mm;
Step (5): be with arc groove steel plate 7 described in the first troughing plate 1 lower weld;
Step (6): make Screw arbor with nut at both-ends 3 and earth anchor anchor pole 14, the diameter of Screw arbor with nut at both-ends 3 and earth anchor anchor pole 14 should be not less than 25mm, and cutting thread process is carried out in screw rod two ends and anchor pole end;
Step (7): difference welding hanging ring 16 and steel loop 17 on the first troughing plate 1 and earth anchor grooved steel plate 13;
Step (8): the magnificent blue bolt 18 of interim installation.
Claims (5)
1. the axial compression ratio of structural seismic performance test applies and a test piece fixing device, it is characterized in that: device comprises:
Axial compression ratio for carrying out axle pressure test to test specimen (10) applies system; Comprise the first troughing plate (1), the second troughing plate (2), Screw arbor with nut at both-ends (3), setscrew nut (4), hold-down nut (5), billet (6), band arc groove steel plate (7), force snesor (8), lifting jack (9) and billet (11); Wherein, described first troughing plate (1) all has horizontal segment with the both wings of the second troughing plate (2), reserved screw on horizontal segment, by Screw arbor with nut at both-ends (3), setscrew nut (4) and hold-down nut (5) by relatively fixing between described first troughing plate (1) and the second troughing plate (2), between the second troughing plate (2) to described first troughing plate (1), place test specimen (10), billet (11), lifting jack (9), force snesor (8) and band arc groove steel plate (7) successively;
For the bottom of test specimen (10) being fixed on the earth anchorage system on grade beam; This system comprises the two groups of fixation kits being symmetricly set on test specimen (10) two bottom sides, and often group comprises earth anchor grooved steel plate (13), earth anchor anchor pole (14), billet (6) and earth anchor nut (15); Wherein, described grade beam is provided with the vertical channel passed for described earth anchor anchor pole (14), the reserved threaded hole passed for earth anchor anchor pole (14) on described earth anchor grooved steel plate (13) both wings horizontal segment; Described test specimen (10) is relative with described grade beam fixing by earth anchor grooved steel plate (13), earth anchor anchor pole (14) and earth anchor nut (15);
Also comprise the eccentric adjustment system of an axial pressure, carry out bias adjustment for applying system to described axial compression ratio; Upper welding two suspension ring (17) of described first grooved steel plate (1), described earth anchor grooved steel plate (13) is provided with steel loop (16), and magnificent blue bolt (18) connects 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, it is characterized in that: the reserved groove (12) passed for described second troughing plate (2) in described test specimen (10) bottom.
3. the axial compression ratio of structural seismic performance test according to claim 1 applies and test piece fixing device, it is characterized in that: the both wings horizontal segment of the both wings horizontal segment of described first troughing plate (1), the both wings horizontal segment of the second troughing plate (2) and earth anchor grooved steel plate (13) is respectively arranged with bending resistance billet (6), and the diameter of described Screw arbor with nut at both-ends (3) and earth anchor anchor pole (14) is not less than 25mm.
4. utilize the axial compression ratio applying of any described structural seismic performance test in claim 1 ~ 3 and test piece fixing device to carry out loading a fixing method, it is characterized in that: comprise following step:
The first step: under first earth anchor anchor pole (14) being placed on grade beam, then be placed on the base of test specimen (10) by earth anchor grooved steel plate (13), makes earth anchor anchor pole (14) through the preformed hole of horizontal segment on troughing plate (13) both wings;
Second step: put into bending resistance billet (6) and earth anchor nut (15) at troughing plate (13) both wings horizontal segment successively, be fixed by fastening nut; Described earth anchor grooved steel plate (13) bottom both wings horizontal segment and ground initial distance are 2 ~ 3cm, distortion after and ground distance be not less than 3mm;
3rd step: weld steel loop (16), suspension ring (17) respectively in advance on earth anchor grooved steel plate (13), the first troughing plate (1);
4th step: the magnificent blue bolt (18) of interim installation, realizes the bias adjustment of the first troughing plate (1) in axial compression ratio applying system by adjusting magnificent blue screw.
5. the axial compression ratio that structural seismic performance according to claim 4 is tested applies and test piece fixing device carries out loading fixing method, it is characterized in that: in process of the test, adopt dial gauge to test to the small horizontal shift of test specimen (10) base, the horizontal shift of introducing displacement coefficient method small to test specimen during data analysis is revised.
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Cited By (6)
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| CN105865734A (en) * | 2016-04-28 | 2016-08-17 | 福州大学 | Loading device for testing anti-seismic property of reinforced concrete bridge pier and usage method |
| CN106092476A (en) * | 2016-06-14 | 2016-11-09 | 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 |
| CN111307584A (en) * | 2019-11-22 | 2020-06-19 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106092476A (en) * | 2016-06-14 | 2016-11-09 | 河海大学 | Civil engineering structure shock test device |
| 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 |
| CN111307584A (en) * | 2019-11-22 | 2020-06-19 | 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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| CN104713691B (en) | 2017-05-10 |
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