CN102374950B - Test device for service performance of reinforced column under load and environment coupled action - Google Patents
Test device for service performance of reinforced column under load and environment coupled action Download PDFInfo
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- CN102374950B CN102374950B CN201110364192.0A CN201110364192A CN102374950B CN 102374950 B CN102374950 B CN 102374950B CN 201110364192 A CN201110364192 A CN 201110364192A CN 102374950 B CN102374950 B CN 102374950B
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Abstract
The invention relates to a test device for service performance of a reinforced column, in particular to be suitable for occasions for researching mechanical property and residual bearing capacity of the reinforced column under a load and environment coupled action, belonging to the field of structure durability tests. The test device comprises the reinforced column, a prepared hole arranged on the reinforced column, a tensile rib, a fixing member, an anchoring member, a loading support, an environment simulation box and a test machine, wherein the tensile rib is penetrated and inserted into the prepared hole of the reinforced column, the fixing member is fixed at one end of the tensile rib, the anchoring member is fixed on the other end of the tensile rib, the middle of the loading support is provided with a through hole, the pore diameter of the through hole is more than the diameter of the fixing member and the anchoring member, and the fixing member and the anchoring member can be penetrated and inserted into the through hole of the loading support and are movably connected with the loading support relatively up and down.
Description
Technical field
The present invention relates to a kind of test unit of reinforced column life-cycle military service performance, be particularly useful for the occasion that reinforced column time-varying force under research environment and load coupling is learned performance and Residual Load Bearing Capacity, belong to structure durability test field.
Background technology
Xoncrete structure is all to work under certain load action, and stands the many factors couplings such as sclerosis, infiltration, freeze thawing, chemical erosion, a large amount of without the reasonable residing virtual condition of reflect structure of the concrete durability achievement under load action.Since half a century, xoncrete structure causes the accident of too early destruction, the lost of life to be on the increase because permanance is not enough, especially the Important Project such as dam, road, bridge, harbour and high-rise do not reach design period just the accident of destruction happen occasionally and cause huge economic loss and casualties.Therefore, system is carried out the permanance of xoncrete structure, member under dual or multiple damage factors effect and great science and technology and the theoretical difficult problem that military service performance study is current field of civil engineering.Study the permanance of xoncrete structure, member under complex environment effect and load coupling, must first propose a set of endurance test system that can consider that a plurality of factors act on simultaneously.But, also there is no such test method and the test unit that can carry out reinforced column life-cycle military service performance at present.The test of reinforced column mechanical property at present is normally carried out on long column testing machine or steel construction reaction frame testing table, and this is a kind of test unit of short-term mechanical property.
Therefore, prior art still has the following disadvantages: the one, do not consider the impact of working load effect, and actual components is load operation; The 2nd, can not consider the impact of structural elements Service Environment, because test unit is bulky, cannot put into existing simulated acceleration test equipment, as residing working environments of simulation practical structures such as freezing-thawing test machine, carbonization case, artificial environment simulation boxes, enable to put into existing acceleration environment simulated test facility, the anticorrosion and performance degradation of charger itself is also an insoluble technical matters; The 3rd, prior art cannot record the Residual Load Bearing Capacity of member under use state, and prior art mostly is in groups the member of combination by reaction frame load application, and the Residual Load Bearing Capacity that record member must shed to hold and carry a device and then carry out slow test.
And prior art is all the experimental techniques about beam, as the disclosed technology of patent CN 201681017 U.This shedding holds that to carry the slow test acquired results carrying out after device completely different from actual conditions, as: when earthquake or wind or other can cause load that structural elements lotus is destroyed to occur, we can not all lay down the working load acting on structural elements, and while just occurring as earthquake, we can not guarantee that all personnel can be from withdrawing buildings completely.The destruction of structural elements is structural elements working load and the coefficient result of accidental load often.For this reason, people pay close attention to more be structural elements under working load and environment acting in conjunction, under normal operating conditions along with the degeneration Decay Law of the passing member of active time with and the abilities that also have how many opposing accidental loads to destroy.
Summary of the invention
The object of the invention is to solve in current test unit and can not consider working load effect, bulkyly can not consider Service Environment impact, cannot in the situation that not unloading, record the Residual Load Bearing Capacity of member, cannot test environment and the shortcoming of load coupling lower prop life-cycle military service performance, provide a kind of simple in structure, easy to operate, volume is small and exquisite, do not account for test space and can consider the reinforced column life-cycle military service performance of environment and load coupling and the test unit that Residual Load Bearing Capacity changes simultaneously.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention is a kind of test loading device for life-cycle service property of reinforced concrete column, comprise reinforced column, be opened in the preformed hole on reinforced column, pulling force rib, fixture, anchoring piece, load bearing, environmental chamber and testing machine, pulling force rib is interspersed in the preformed hole of reinforced column, fixture is fixed on one end of pulling force rib, anchoring piece is fixed on the other end of pulling force rib, the centre that loads bearing offers through hole, aperture is greater than the diameter of fixture and anchoring piece, fixture and anchoring piece can be interspersed in the through hole that loads bearing and with load the relative up and down connection of bearing.
As a kind of improvement, the preformed hole on reinforced column of the present invention is offered along the length direction of post.
As a kind of improvement, the edge of a wing of outstanding post is left at the two ends of reinforced column of the present invention, and the edge of a wing is wide with post, and root height is not less than the height of post.
As a kind of improvement, preformed hole of the present invention is opened on the edge of a wing along column length direction.
As a kind of improvement, preformed hole of the present invention is opened on cylinder along column length direction.
As a kind of improvement, pulling force rib of the present invention is stainless steel steel strand wires or the antiseptic high-durability steel wire of process or steel strand wires or stainless steel precision bundle screw-thread steel or the antiseptic essence bundle of process screw-thread steel, and under environmental activity, permanance does not reduce.
As a kind of improvement, fixture of the present invention, anchoring piece are stainless steel or process preservative treatment, and under environmental activity, permanance does not reduce.
As a kind of improvement, the centre of loading bearing of the present invention offers through hole, aperture is greater than the diameter of fixture and anchoring piece, load bearing to fixture and anchoring piece without constraint, when secondary loads, fixture and anchoring piece can longitudinally move freely in the hole that loads bearing.
Cross section, the edge of a wing of the present invention can be square, can be also trapezoidal.When concrete use, first pulling force rib is penetrated to the preformed hole of post, by the fixing one end of pulling force rib of fixture, anchoring piece is the other end of pulling force rib fixedly, and the anchored end of stretch-draw pulling force rib reaches design load, fixed anchors, the post of load application is put into environmental chamber, after reaching design age, taking-up post is placed in coupled columns on testing machine reaction frame by two ends loading place of loading bearing alignment post and applies ultimate load, can obtain the Residual Load Bearing Capacity of post.
Beneficial effect of the present invention is mainly manifested in:
1, not corrosion of charger, intensity are high, can meet the loading needs of arbitrary dimension post, Arbitrary Load ratio;
2, test unit volume is little, take up space hardly, can make full use of existing durability test device as the simulation member real work states such as freezing-thawing test machine, carbonization case, artificial environment simulation box, research environment and the mechanical property of load coupling to reinforced column;
3, do not need unloading test, can directly to holding the concrete column (not laying down in the situation of working load) of the state of carrying, carry out the Mechanics Performance Testings such as continuous stress-strain, load-amount of deflection, Residual Load Bearing Capacity, and the charger of lasting load loads and there is no effect of contraction secondary, can truly reflect load and the impact of environment coupled action on reinforced column life-cycle military service performance and Residual Load Bearing Capacity, fully warranty test result discloses overall process failure mechanism and the damage failure procedure of reflection post under actual working state of post.
Accompanying drawing explanation
Fig. 1 is the structural representation of test loading device for life-cycle service property of reinforced concrete column;
Fig. 2 is the structural representation that test loading device for life-cycle service property of reinforced concrete column applies ultimate load state;
Fig. 3 is reinforced column A structural representation;
Fig. 4 is reinforced column B structural representation;
Fig. 5 is reinforced column C-structure schematic diagram;
Fig. 6 is the structural representation that the post of load application is put in load and environment coupled action in environmental chamber;
Fig. 7 is loading bearing diagrammatic cross-section with holes;
Fig. 8 is loading bearing schematic top plan view with holes.
In figure, 1 is reinforced column, and 2 is preformed hole, and 3 is pulling force rib, and 4 is fixture, and 5 is anchoring piece, and 6 for loading bearing, and 7 is environmental chamber, and 8 is testing machine, and 9 is cylinder, and 10 is the edge of a wing.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of reinforced column 1 test loading device for life-cycle service property, a kind of reinforced column 1 test loading device for life-cycle service property, comprise reinforced column 1, be opened in the preformed hole 2 on reinforced column 1, pulling force rib 3, fixture 4, anchoring piece 5, loading bearing 6 with holes and testing machine 8, pulling force rib 3 is interspersed in the preformed hole 2 of reinforced column 1, fixture 4 is fixed on one end of pulling force rib 3, anchoring piece 5 is fixed on the other end of pulling force rib 3, the centre that loads bearing offers through hole, aperture is greater than the diameter of fixture and anchoring piece, fixture 4 and anchoring piece 5 can be interspersed in the through hole that loads bearing 6 and with load the relative up and down connection of bearing 6, load 6 pairs of fixtures 4 of bearing and anchoring piece 5 without constraint, when secondary loads, fixture 4 and anchoring piece 5 can longitudinally move freely in the through hole that loads bearing 6.
In concrete use procedure, first pulling force rib 3 is penetrated to the preformed hole 2 of post, by the fixing one end of pulling force rib 3 of fixture 4, anchoring piece 5 is the other end of pulling force rib 3 fixedly, the anchored end of stretch-draw pulling force rib 3 reaches design load, fixed anchors 5, puts into environmental chamber 7 by the post of load application, and the post that Fig. 6 is load application is put in the structural representation of load and environment coupled action in environmental chamber 7; After reaching design age, taking-up post is placed in coupled columns on testing machine 8 by 6 alignment post two ends loadings place of loading bearing and applies ultimate load, and the testing machine 8 here can be also reaction frame, as Fig. 2.Fig. 7 is loading bearing 6 diagrammatic cross-sections with holes, and Fig. 8 is loading bearing 6 schematic top plan view with holes, loads the structure of bearing 6 as shown in Fig. 7 and 8.
The structure of reinforced column 1 has multiple, now exemplifies following three classical structures:
Fig. 3 is reinforced column 1A structural representation; Preformed hole 2 is offered along the length direction of reinforced column 1.
Fig. 4 is reinforced column 1B structural representation; Reinforced column 1 comprises cylinder 10 and the edge of a wing 9, and the cross section on the edge of a wing 9 is square, and preformed hole 2 is opened on cylinder 10 along the length direction of reinforced column 1.
Fig. 5 is reinforced column 1C structural representation; Reinforced column 1 comprises cylinder 10 and the edge of a wing 9, and the cross section on the edge of a wing 9 is trapezoidal, and preformed hole 2 is opened on the edge of a wing 9 along the length direction of reinforced column 1.
Below by a specific embodiment, technical scheme of the present invention is elaborated:
(1) as shown in Figure 1; first according to testing program, require to make reinforced column 1; the sectional dimension of post is 120 * 120mm; high 750mm, the main muscle of post is 4 φ 10, stirrup is φ 650-100; protective seam 15mm; the length of the edge of a wing 9 outstanding posts is 120mm, the reserved eccentric throw 100mm at 9 positions, the edge of a wing, post two ends, the symmetrical preformed hole 2 of diameter 32mm.By the reinforced column after moulding 1 form removal standard curing room maintenance 28 days two days later.
(2) according to the ultimate bearing capacity that calculates post, be 64kN, coupled columns applies 50% ultimate load, i.e. 32000kN.First the stainless fining twisted steel pulling force rib 3 that is 25mm by diameter penetrates the preformed hole 2 on the post edge of a wing 9, then stainless steel threaded fasteners 4 is screwed in to one end of screw-thread steel pulling force rib 3, stainless steel threaded anchoring piece 5 is screwed in to the other end of screw-thread steel, use again centre-hole jack from anchored end stretch-draw screw-thread steel pulling force rib 3, consider because post its Stiffness Deterioration under environment and load coupling causes stress relaxation, coupled columns carries out 5% super stretch-draw as calculated, the actual 35.2kN load that applies, when stretching force reaches rear 35.2kN, hold lotus 3 minutes, then fixed anchors 5.
(3) after the lasting load of member applies, member is put into artificial environment simulation box 7, the actual working state of model configuration, as shown in Figure 6.
(4) after reaching design age, from artificial environment simulation box 7, take out post, loading bearing 6 with holes is penetrated to fixture 4 and anchoring piece 5, then successively by power sensor, lifting jack is arranged on steel construction reaction frame testing table 8, finally to test specimen load application, until structural failure.The Residual Load Bearing Capacity that records post is 16kN, than the bearing capacity of not considering environment and load coupling post, reduces by 25%.
Finally; it is also to be noted that; what more than enumerate is only a specific embodiment of the present invention; obviously; the invention is not restricted to above embodiment; can also have many distortion, all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (7)
1. a test loading device for life-cycle service property of reinforced concrete column, it is characterized in that, comprise reinforced column (1), be opened in the preformed hole (2) on reinforced column (1), pulling force rib (3), fixture (4), anchoring piece (5), loading bearing with holes (6), environmental chamber (7) and testing machine (8)/reaction frame, described pulling force rib (3) is interspersed in the preformed hole (2) of reinforced column (1), fixture (4) is fixed on one end of pulling force rib (3), anchoring piece (5) is fixed on the other end of pulling force rib (3), the centre of described loading bearing (6) offers through hole, aperture is greater than the diameter of fixture (4) and anchoring piece (5), described fixture (4) and anchoring piece (5) can be interspersed in the through hole that loads bearing (6) and with load the relative up and down connection of bearing (6), load bearing (6) to fixture (4) and the constraint of anchoring piece (5) nothing, when secondary loads, fixture (4) and anchoring piece (5) can longitudinally move freely in the through hole that loads bearing (6).
2. according to the charger described in claim 1, it is characterized in that, the preformed hole (2) on described reinforced column (1) is offered along the length direction of post.
3. according to the charger described in claim 1, it is characterized in that, the edge of a wing (9) of outstanding post is left at the two ends of described reinforced column (1), and the edge of a wing (9) are wide with post, and root height is not less than the height of post.
4. according to the charger described in claim 3, it is characterized in that, described preformed hole (2) is opened on the edge of a wing (9) along column length direction.
5. according to the charger described in claim 3, it is characterized in that, described preformed hole (2) is opened on cylinder (10) along column length direction.
6. according to the charger described in claim 2 or 4 or 5, it is characterized in that, described pulling force rib (3) is stainless steel steel strand wires or pricks screw-thread steel or prick screw-thread steel through antiseptic essence through antiseptic high-durability steel wire or through antiseptic steel strand wires or stainless steel precision.
7. according to the charger described in claim 6, it is characterized in that, described fixture (4), anchoring piece (5) are stainless steel or process preservative treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110364192.0A CN102374950B (en) | 2011-11-16 | 2011-11-16 | Test device for service performance of reinforced column under load and environment coupled action |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110364192.0A CN102374950B (en) | 2011-11-16 | 2011-11-16 | Test device for service performance of reinforced column under load and environment coupled action |
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| CN102374950A CN102374950A (en) | 2012-03-14 |
| CN102374950B true CN102374950B (en) | 2014-08-13 |
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| CN102706748B (en) * | 2012-06-18 | 2014-08-20 | 金陵科技学院 | Method and device capable of increasing effective working space of tensile testing machine |
| CN102914470B (en) * | 2012-11-15 | 2014-12-31 | 上海城建市政工程（集团）有限公司 | Device and method for testing concrete sample beam stiffness |
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| CN103743587A (en) * | 2014-01-03 | 2014-04-23 | 中交四航工程研究院有限公司 | Marine environment and dynamic load coupling test equipment system |
| CN103837416B (en) * | 2014-03-18 | 2015-12-23 | 中国人民解放军理工大学 | That simulates deep rock mass stress state adds unloading test device |
| CN104713797B (en) * | 2015-01-29 | 2017-02-22 | 同济大学 | Method for detecting residual carrying capacity of rusty steel wire in cable |
| CN111678767A (en) * | 2020-06-24 | 2020-09-18 | 扬州大学 | Load holding device for concrete eccentric compression member in erosion service environment and working process thereof |
| CN115753344A (en) * | 2022-11-30 | 2023-03-07 | 南京理工大学 | Loading device for axial load of column structure under action of explosive impact |
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| CN101979990A (en) * | 2010-10-15 | 2011-02-23 | 中国建筑材料科学研究总院 | Self-positioning detachable concrete durability test stress loading device |
| CN202330149U (en) * | 2011-11-16 | 2012-07-11 | 浙江建设职业技术学院 | Test loading device for life-cycle service property of reinforced concrete column |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535630C (en) * | 2007-07-10 | 2009-09-02 | 浙江大学 | Armoured concrete test teaching integrated loading device |
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Patent Citations (5)
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|---|---|---|---|---|
| CN101271103A (en) * | 2008-05-16 | 2008-09-24 | 东南大学 | Experimental device for concrete multifactor permanent stability under co-action of pulling stress and surroundings |
| CN201681017U (en) * | 2009-10-22 | 2010-12-22 | 北京航空航天大学 | Continual loading device for reinforced concrete beam freeze-thawing loading coupling durability test |
| CN101726439A (en) * | 2009-12-18 | 2010-06-09 | 东南大学 | Method for testing concrete performance under pressure stress-chemical coupling effect and device thereof |
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| CN202330149U (en) * | 2011-11-16 | 2012-07-11 | 浙江建设职业技术学院 | Test loading device for life-cycle service property of reinforced concrete column |
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