CN203732370U - Non-uninstalled reinforcement testing device for axial compression columns - Google Patents
Non-uninstalled reinforcement testing device for axial compression columns Download PDFInfo
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- CN203732370U CN203732370U CN201320659460.6U CN201320659460U CN203732370U CN 203732370 U CN203732370 U CN 203732370U CN 201320659460 U CN201320659460 U CN 201320659460U CN 203732370 U CN203732370 U CN 203732370U
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Abstract
The utility model discloses a non-uninstalled reinforcement testing device for axial compression columns. The non-uninstalled reinforcement testing device comprises a rigid reaction frame, a movable rigid crossbeam, a load applying device, two force sensors and a strain gage, wherein the movable rigid crossbeam can move upwards and downwards, the strain gage is connected with the two force sensors, the rigid reaction frame is composed of two rigid frame stand-columns and a fixed crossbeam, a testing column to be detected is arranged between the fixed crossbeam and the movable rigid crossbeam, and the movable rigid crossbeam is arranged between the two stand-columns; the load applying device comprises two screw jacks and a hydraulic jack, and the hydraulic jack is arranged between the two screw jacks; a flat plate hinge and a pressure distribution plate are arranged between the testing column and the fixed crossbeam arranged at the upper end of the testing column, and a pressure distribution plate and a spherical hinge are arranged between the testing column and a rigid crossbeam at the lower end of the testing column, and the pressure distribution plates are in contact with a column end. The testing device disclosed by the utility model is simple in structure, safe and reliable, and good in pressure stabilizing effect under high loads, and has no machine loss.
Description
Technical field
The utility model belongs to test unit, is specifically related to the non-unloading reinforcement experiment of a kind of Axial-compression Column device.
Background technology
The compression member coming into operation, if desired reinforce, should first unload and just can make the effect of back-up coat be not fully exerted, but in Practical Project, be difficult to accomplish this point, can only accomplish partial relief or not unloading, be that former member has born load action before reinforcing, be called first stage load-bearing, after reinforcing, only have when external load continuation increase, be called subordinate phase load-bearing, the distortion of member also continues to increase, back-up coat just can assist former member to bear the effect of newly-increased external load, and this makes the stress and strain of former member all be ahead of back-up coat.
At present, the test that the non-unloading of compression member is reinforced is normally carried out on hydraulic pressure long column testing machine, when post voltage stabilizing " first stage load-bearing " in the situation that on testing machine to column production back-up coat, maintenance or be bonded to the corresponding length of time, then complete " subordinate phase loading " until reinforced column destroys.The drawback that this mode exists is apparent, comprise while causing taking machine because back-up coat curing period is long too many, long-time overheated large to testing machine loss, under hydropress top load, voltage regulation result is poor and cause the stress level index β distortion that " first stage load-bearing " the is corresponding (definition β=N that diminishes
0/ N, N
0for " first stage load-bearing " the actual loading value after stable, N is the limit failing load of former post), or may make the Binder Materials in back-up coat disappear completely with the just cohesive action of foundation of former post concrete in order to maintain the repeatedly ftercompction operation that stress level index β does, in addition, on long column testing machine, carry out strengthening construction operation also very inconvenient.The importance of the test that the experimental study of Axial-compression Column of Reinforced Concrete stress performance is reinforced as the non-unloading of compression member, meets the experimental study that the non-unloading of vast scale Axial-compression Column of engineering actual conditions reinforces significant.
Utility model content
The purpose of this utility model overcomes that the voltage regulation result existing in prior art is poor, and machine loss is large, and awkward problem, the non-unloading reinforcement experiment of a kind of Axial-compression Column device is provided, and this device is not only simple in structure, safe and reliable, and under top load, voltage regulation result is good, without machine loss.
Find by the literature reading to a large amount of both at home and abroad and Field Research, because test unit and the test method problem of simulation full size reinforced column " two stage load-bearings " fail better to be solved, recent domestic is adopted in the experimental study of the whole bag of tricks reinforced steel concrete compression member, all that the load-bearing that does not meet engineering actual conditions carrying out is reinforced research, be the making that the former post of testing column completes back-up coat in the situation that there is no carrying, be then placed on pressure testing machine and carry out failure test.As for this engineering problem of solid ply strain and the former post hysteresis of stress ratio, the unified reduction coefficient that adopts is paid attention to, but its actual conditions tend to change because of the difference of difference, the reinforcing layer material kind etc. of the difference of the stress level index β under " first stage load-bearing ", post element type.Visible this reduction coefficient method, with very large rough property, has caused untrue property and the unreliability of Design of Reinforcement naturally.
For realizing the purpose of this utility model, the technical scheme of employing is as follows:
The non-unloading reinforcement experiment of Axial-compression Column device, comprise counter-force rigid frame, portable rigid beam moving up and down, load applying device, two power sensors and the strainmeter being connected with two power sensors, counter-force rigid frame is made up of two rigid frame columns and fixed cross beam, and testing column to be measured is installed between fixed cross beam and portable rigid beam, and its special character is: described portable rigid beam is arranged between two columns; Described load applying device comprises two screw jacks and a fluid pressure type lifting jack, and fluid pressure type lifting jack is arranged between two screw jacks; Dull and stereotyped hinge and pressure distribution plate are set between testing column and the fixed cross beam of its upper end, between the portable rigid beam of testing column and its lower end, pressure distribution plate and ball pivot are set, pressure distribution plate all contacts with styletable.
Further, described portable rigid beam is that steel construction box cuts section bar, and the length breadth ratio of portable rigid beam is 4, is provided with the intensity floor of putting more energy in portable rigid beam, and portable rigid beam two ends respectively arrange four steamboats; The medial surface setting of described rigid frame column can make the conduit of the free scroll-up/down of steamboat.
Further, described screw jack is that specified tonnage is 1000kN screw machine lifting jack.
Further, described fluid pressure type lifting jack is that specified tonnage is 5000kN fluid pressure type lifting jack, and fluid pressure type lifting jack is connected with the high-voltage electric oil pump that high-precision hydraulic table is housed.
Further, described test unit also comprises the safe steel cable for the protection of testing column.
The utility model is with respect to prior art, and tool has the following advantages and effect:
This test unit its execute lotus ability Ji Liang Measuring scope can meet the full scale test post consistent with engineering actual conditions reinforce after the test request of maximum bearing capacity.
The loading voltage regulation result of this test unit can meet during holding lotus, make newly to manufacture not directly pressurized and secure bond at former post surface back-up coat always in 0 stress state.
3. this test unit is in each moment and under each class of loading, and the energy actual load-bearing size of its member of Accurate Measurement and deformation values, meet measuring accuracy requirement.
4. this test unit meets security requirement.
5. this test unit controllability is good, simple in structure, easy and simple to handle.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Wherein, 1-fixed cross beam, the dull and stereotyped hinge of 2-, 3-pressure distribution plate, 4-testing column, 5-ball pivot, the portable rigid beam of 6-, 7-power sensor, 8-fluid pressure type lifting jack, 9-screw jack, 10-column, the safe steel cable of 11-.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the non-unloading reinforcement experiment of the Axial-compression Column apparatus structure that the utility model provides.For convenience of explanation, only show the part relevant to the utility model.
The non-unloading reinforcement experiment of Axial-compression Column of the present utility model device, comprising: counter-force rigid frame, portable rigid beam 6 moving up and down, load applying device, two power sensors 7 and the strainmeter being connected with two power sensors; Counter-force rigid frame is made up of two columns 10 and fixed cross beam 1, and testing column 4 to be measured is installed between fixed cross beam 1 and portable rigid beam 6, and portable rigid beam 6 is arranged between two columns 10; Load applying device comprises two screw jacks 9 and a fluid pressure type lifting jack 8, and fluid pressure type lifting jack 8 is arranged between two screw jacks 9; Dull and stereotyped hinge 2 and pressure distribution plate 3 are set between the fixed cross beam 1 of testing column 4 and its upper end, pressure distribution plate 3 and ball pivot 5 are set between the portable rigid beam 6 of testing column 4 and its lower end, pressure distribution plate 3 all contacts with styletable.
As a prioritization scheme of the utility model embodiment, portable rigid beam 6 cuts section bar for steel construction box, the length breadth ratio of portable rigid beam 6 is 4, is provided with the intensity floor of putting more energy in portable rigid beam 6, and portable rigid beam 6 two ends respectively arrange four steamboats; The medial surface setting of described rigid frame column 10 can make the conduit of the free scroll-up/down of steamboat.
As a prioritization scheme of the utility model embodiment, screw jack 9 for specified tonnage be 1000kN screw machine lifting jack.
As a prioritization scheme of the utility model embodiment, fluid pressure type lifting jack 8 for specified tonnage be 5000kN fluid pressure type lifting jack, fluid pressure type lifting jack 8 is connected with the high-voltage electric oil pump that high-precision hydraulic table is housed.
As a prioritization scheme of the utility model embodiment, test unit also comprises the safe steel cable 11 for the protection of testing column.
Below in conjunction with drawings and the specific embodiments, application principle of the present utility model is further described.
As shown in Figure 1, the non-unloading reinforcement experiment of the Axial-compression Column of the utility model embodiment device, comprising: counter-force rigid frame, portable rigid beam 6 moving up and down, load applying device, two power sensors 7 and the strainmeter being connected with two power sensors; Counter-force rigid frame is made up of two columns 10 and fixed cross beam 1, and testing column 4 to be measured is installed between fixed cross beam 1 and portable rigid beam 6, and portable rigid beam 6 is arranged between two columns 10; Portable rigid beam 6 cuts section bar for steel construction box, and the length breadth ratio of portable rigid beam 6 is 4, is provided with the intensity floor of putting more energy in portable rigid beam 6, and portable rigid beam 6 two ends respectively arrange four steamboats; The medial surface setting of column 10 can make the conduit of the free scroll-up/down of steamboat.Load applying device comprises two screw jacks 9 and a fluid pressure type lifting jack 8, fluid pressure type lifting jack 8 is arranged between two screw jacks 9, screw jack 9 for specified tonnage be 1000kN screw machine lifting jack, fluid pressure type lifting jack 8 for specified tonnage be 5000kN fluid pressure type lifting jack, fluid pressure type lifting jack 8 is connected with the high-voltage electric oil pump that high-precision hydraulic table is housed; Dull and stereotyped hinge 2 and pressure distribution plate 3 are set between the fixed cross beam 1 of testing column 4 and its upper end, pressure distribution plate 3 and ball pivot 5 are set between the rigid beam 6 of testing column 4 and its lower end, pressure distribution plate 3 all contacts with styletable.This test unit also comprises the safe steel cable 11 for the protection of testing column.
Test unit of the present utility model, in the time making, considers that large-tonnage long column testing machine has the high feature of loading and convenient test and precision comprehensively, but long-time voltage regulation result is poor, and machine abrasion itself are large, hold for a long time lotus pressurization and can lower service life of a machine; Oil pressure thousand nearly top loading ranges are large, do not need need to manually shake pressure as mechanic jacks, but long-time interior voltage regulation result are poor, has oil leak phenomenon; Separate unit mechanic jacks is due to mostly by manual operation, and maximum load tonnage is less than normal, can not meet the range requirement of full size post, but long-time interior voltage regulation result is fabulous.Considering after loading equipemtn relative merits separately, and consider after the convenience and controllability of safety factor and operation, develop the non-unloading reinforcement experiment of Axial-compression Column of the present utility model device as shown in Figure 1, this device each several part work coordination, is well positioned to meet the requirement of the each side such as range ability, voltage regulation result, measuring accuracy, security, controllability, ease for operation.By this device, scientific experimentation and the actual post component test of engineering that can complete the model post of axial compression detect, for research and analysis provide a large amount of preciousnesses reliable test data.
Test unit of the present utility model is in the time carrying out the non-unloading reinforcement experiment of Axial-compression Column, cut with scissors by the ball pivot of post lower end and the flat board of pressure distribution plate and post upper end the vertical Compression that imposes on post with pressure distribution plate, this vertical load along pressure distribution plate with area load formal distribution, be one along the equally distributed axial compression load of column section.
Test method: according to the relevant regulations of " Architectural Structure Experimentation code ", fluid pressure type lifting jack to this test unit on long column oil test machine accurately and support the use with it high-voltage electric oil pump and demarcate, be opposite to two power sensors on screw machine lifting jack and with it matching used strainmeter demarcate; Successively dull and stereotyped to 3 lifting jack, portable rigid beam, post upper end hinge, post lower end ball pivot, pressure distribution plate and testing column are pressed to Fig. 1 position in place, first-class safe steel cable, and carry out the geometry centerings of each several part.After the preliminary works such as, centering in place at each several part, calibration complete, should check that whether safe steel cable is in non-stress state.By observing the strain variation on the strainmeter being connected with two power sensors, command two operators to shake simultaneously and press two screw jacks, make its portable crossbeam of pushing tow symmetrically and evenly, thereby coupled columns applies xial feed, in the time that payload values reaches the design load value (corresponding stress level index is β) of " first stage load-bearing ", stop shaking pressure.At initial stage under first stage payload values effect, reinforced column makes the meeting of the actual compressive stress ratio of post progressively lower than β the distortion of generation elastic compression.Therefore should observe the 1st week planted agent the variation of strain on strainmeter, suitably do if desired ftercompction operation, when strain value no longer declines or only has the variation of several microstrains, explanation reaches voltage stabilizing level substantially.This process has been utilized the good feature of mechanic jacks voltage regulation result just.The payload values that " first stage load-bearing " is corresponding generally can not exceed reinforced column limit failing load 60%, although manually-operated mechanic jacks has the advantages that specified tonnage is relatively little, in device, use side by side two 1000kN screw machine lifting jack just can meet the demands.Be N to the stable size of bearing
0xial feed effect and completed strengthening construction pre-service testing column carry out strengthening construction, and maintenance or be bonded to the corresponding length of time.Through the maintenance in the corresponding length of time or fixed, the intensity of back-up coat itself and reaching after designing requirement with the cohesive strength of former post faying face, the 5000kN hydraulic jack that starts to enable high-pressure oil pump and be positioned at portable rigid beam bottom, and by observing hydralic pressure gauge reading, its loading velocity and class of loading are manipulated, realize and complete " subordinate phase load-bearing " process of the test to reinforced column, until testing column destroys after reaching maximum load capacity.In " subordinate phase load-bearing " process, two mechanical jacks are deactivated gradually, and hydraulic jack progressively bears increasing and even whole Compression (therefore the axis of a cylinder power under loads at different levels should be the xial feed sum that three lifting jack apply).Reinforced column reaches after maximum load capacity, and oil pressure gauge pointer starts rollback, payload values return back to maximum load capacity 80% after, stop test, close hydraulically operated equipment (HOE) oil return, off-test.What mostly occur greatly due to reinforced column is the obvious ductile fracture of omen, so oil pressure gauge pointer rollback is slow, owing to also having the protection of safe steel cable, security has obtained good guarantee.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. the non-unloading reinforcement experiment of Axial-compression Column device, comprise counter-force rigid frame, portable rigid beam moving up and down (6), load applying device, two power sensors (7) and the strainmeter being connected with two power sensors, counter-force rigid frame is made up of two columns (10) and fixed cross beam (1), and testing column to be measured is installed between fixed cross beam (1) and portable rigid beam (6), it is characterized in that: described portable rigid beam (6) is arranged between two columns (10); Described load applying device comprises two screw jacks (9) and a fluid pressure type lifting jack (8), and fluid pressure type lifting jack (8) is arranged between two screw jacks (9); Dull and stereotyped hinge (2) and pressure distribution plate (3) are set between the fixed cross beam (1) of testing column (4) and its upper end, pressure distribution plate (3) and ball pivot (5) are set between the portable rigid beam (6) of testing column (4) and its lower end, and pressure distribution plate (3) all contacts with styletable.
2. the non-unloading reinforcement experiment of Axial-compression Column according to claim 1 device, it is characterized in that: described portable rigid beam (6) cuts section bar for steel construction box, the length breadth ratio of portable rigid beam (6) is 4, in portable rigid beam (6), be provided with the intensity floor of putting more energy into, portable rigid beam (6) two ends respectively arrange four steamboats; The medial surface setting of described column (10) can make the conduit of the free scroll-up/down of steamboat.
3. the non-unloading reinforcement experiment of Axial-compression Column according to claim 1 device, is characterized in that: described screw jack (9) for specified tonnage be 1000kN screw machine lifting jack.
4. the non-unloading reinforcement experiment of Axial-compression Column according to claim 1 device, it is characterized in that: described fluid pressure type lifting jack (8) for specified tonnage be 5000kN fluid pressure type lifting jack, fluid pressure type lifting jack (8) is connected with the high-voltage electric oil pump that high-precision hydraulic table is housed.
5. the non-unloading reinforcement experiment of Axial-compression Column according to claim 1 device, is characterized in that: described test unit also comprises the safe steel cable (11) for the protection of testing column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659460.6U CN203732370U (en) | 2013-10-24 | 2013-10-24 | Non-uninstalled reinforcement testing device for axial compression columns |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659460.6U CN203732370U (en) | 2013-10-24 | 2013-10-24 | Non-uninstalled reinforcement testing device for axial compression columns |
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| CN203732370U true CN203732370U (en) | 2014-07-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575597A (en) * | 2013-10-24 | 2014-02-12 | 湖南工业大学 | Axial compression column non-loading reinforcement test device |
| CN105259043A (en) * | 2015-10-20 | 2016-01-20 | 武汉大学 | Self-balancing loading device for batch concrete-filled steel tubes |
| WO2018072096A1 (en) * | 2016-10-18 | 2018-04-26 | 金宙科技有限公司 | Measurement system for calibrating automobile spring parameter |
-
2013
- 2013-10-24 CN CN201320659460.6U patent/CN203732370U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575597A (en) * | 2013-10-24 | 2014-02-12 | 湖南工业大学 | Axial compression column non-loading reinforcement test device |
| CN105259043A (en) * | 2015-10-20 | 2016-01-20 | 武汉大学 | Self-balancing loading device for batch concrete-filled steel tubes |
| CN105259043B (en) * | 2015-10-20 | 2017-08-25 | 武汉大学 | Batch concrete filled steel tube self-balanced loading device |
| WO2018072096A1 (en) * | 2016-10-18 | 2018-04-26 | 金宙科技有限公司 | Measurement system for calibrating automobile spring parameter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20141024 |
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| EXPY | Termination of patent right or utility model |