CN205175824U - Apply test device that lasting axle drew damage load to a plurality of concrete samples - Google Patents
Apply test device that lasting axle drew damage load to a plurality of concrete samples Download PDFInfo
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- CN205175824U CN205175824U CN201520952931.1U CN201520952931U CN205175824U CN 205175824 U CN205175824 U CN 205175824U CN 201520952931 U CN201520952931 U CN 201520952931U CN 205175824 U CN205175824 U CN 205175824U
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Abstract
The utility model provides an apply test device that lasting axle drew damage load to a plurality of concrete samples, include: at least three reaction frame, an entablature, loading distribution roof beam, a plurality of connecting rod, two at least threaded connection poles, four limit buckle spares, a gear formula jack, pressure sensor of concatenating, the threaded connection pole is fixed through the nut after passing the entablature, the threaded connection pole hangs a plurality of concrete samples, forms a concrete sample cluster, and loading distribution roof beam transversely erects in the lower beam bar below of three reaction frame, and limit buckle spare welds in the both ends of loading distribution roof beam, sets up between the lower beam bar bottom of middle reaction frame and the loading distribution roof beam gear formula jack, pressure sensor sets up on gear formula jack. The utility model discloses can apply persistent axle to a plurality of concrete samples simultaneously and draw the load, reduce experimental work load, the built -in fitting location is accurate, can improve experimental precision, and can demolish fast, the turnover is used.
Description
Technical field
The utility model relates to technical field of buildings, particularly relate to a kind of to multiple early-age concrete test specimen apply lasting axle draw damage load test unit.
Background technology
Early stripping formwork system technology is a kind of novel " Fast-dismantle system ", is in engineering and promotes the use the stage.Should " Fast-dismantle system " be exactly when the concrete that certain one deck is built reaches some strength, under the prerequisite ensureing construction safety, except the vertical rod retained and tear open evening except supporting member, beam bottom mother plate be done sth. in advance dismounting, thus accelerating construction progress.In aluminum current alloy early stripping formwork system technology, the dismounting time of beam slab bed die is mainly with reference to external experience, reaches 36 hours namely remove beam slab bed die in the age of concrete.But whether only having the xoncrete structure in the 36 hour length of time to produce under the effect of construction loads, whether damage and damage thereof can have an impact to the performance of later stage xoncrete structure is one of engineering staff's problem of showing great attention to.For this reason, the elastic modulus, strain-stress relation, cleavage strength etc. of the damage mechanics performance of research early-age concrete after axial tension load action especially after tension damage calculate one of indispensable index such as early-age concrete structural strength, rigidity and stability.
At present, some researchers are research concrete axle center tensile modulus of elasticity, have also carried out some experimental studies.
Following list of references:
[1] Zhang Wenbo, Mao Mingjie, Yang Qiuning, Chen Wei. the uniaxial tension elastic modulus of flyash concrete. science and technology and journey, 2015,15 (9): 225-229.
[2] pacify bright, Yang Zhihui, remaining self-possessed, Zhai Yanfeng, Gao Kang. the research of RPC tensile property. railway society, 2010,32 (1): 54-58.
[3] Chen Meng, Bi Suping, Liu Lixin, Peng Shaomin. the experimental study of commerical ready-mixed concrete axial tensile strength and tension elastic modulus. Sichuan architecture science is studied, and 34 (2): 186-189.
[4] Mei Guodong, Xu Lihua, Lu Weimiao, Huang Le. fibers content is to the impact analysis of hybrid fiber concrete axle center tensile property. Wuhan University Journal (engineering version), 2013,46 (6): 752-758.
[5] Han Xuecai, Xu Jiawen. the tensile property experimental study of rubber regeneration concrete axle center. Institutes Of Technology Of Taiyuan's journal, 2014,45 (6): 799-802.
Zhang Wenbo (2015) [1] adopts at the pre-buried deformed bar in prism center, reinforcing bar and concrete adhesive property is utilized to apply axle center pulling force to concrete, thus measure concrete uniaxial tension elastic modulus, as shown in Figure 1, the pre-buried deformed bar tension in cylinder center test unit.Number in the figure annotates: screw cutting-1, coheres end-2, reinforcing bar foil gauge-3, concrete strain sheet-4, test specimen central authorities-5, double-sided belt rib reinforcement-6.
Pacify bright (2010) [2] to adopt and be positioned on chuck carry out axial tension test by falling the concrete sample of 8 fonts, as shown in Figure 2, chuck carries out axial tension test unit.Number in the figure annotates: cruciform bracing-1, grip nut-2, framework pull bar-3, chuck-4, vertical rod-5.
Chen Meng (2008) [3] test specimen adopts pre-buried rod-pulling type, and test specimen two ends respectively set a 230mm length, diameter as the HRB335 reinforcing bar of 12mm is as pull bar, and pulling force is delivered in concrete sample by embedded bar.As shown in Figure 3, pre-buried rod-pulling type axis pulling experiment installation drawing.Number in the figure annotates: 1-HRB335 reinforcing bar.
Mei Guodong (2013) [4] adopt at test piece end built-in type dumb-bell shape test specimen, and adopt fine thread screw mandrel to connect, and are connected with ball pivot by cage with the chuck of universal testing machine, apply axle center pulling force.As shown in Figure 4, test piece end built-in type dumb-bell shape test specimen.Number in the figure annotates: universal test machine grip holder-1, ball pivot-2, steel plate-3, spherical nut-4, dynamometry steel pole-5, data acquisition system (DAS)-6, foil gauge-7, extensometer-8.
After the end of the dumbbell shape concrete sample that Han Xuecai (2014) [5] large centre, two is little adopts adhesive glue and steel plate (band pull bar) to bond, carry out axle center tensile test being clamped in testing machine.As shown in Figure 5, be clamped in testing machine and carry out axle center tensile test.Number in the figure annotates: upper connecting rod-1, upper arm-tie-2, dumbbell shape test specimen-3, lower pulling plate-4, lower link-5.
The shortcoming that existing concrete prism axial tension exists is:
1. the method for variable cross section, test specimen makes and comparatively bothers, and needs to make corresponding template, causes test specimen error in physical dimension comparatively large, and then causes eccentric force.
2. installation of embedded parts, time-consumingly to take a lot of work.Embedded bar requires accurately to bury underground, is that the coupling bolt before preliminary work, making test specimen or test is all cumbersome; Bonding rule requires that the adhesive surface of test specimen will process meticulously, and the sclerosis of cementing agent also needs the regular hour, then inapplicable for the test playing mould after the damage of early-age concrete test specimen and damage.
3. can only test single concrete sample, experiment work amount is heavy.And due to concrete discreteness comparatively large, one group of test specimen often needs to carry out test of many times, if one by one lasting damage load is applied to concrete sample, then the workload tested is very huge.And adopt multiple test specimen to test simultaneously, tricks and the workload of test unit can be reduced.
4. lasting axial load can not be applied to concrete sample.Current test concrete sample being applied to axial tension is disposable failure test mostly.
Summary of the invention
The technical problems to be solved in the utility model, is that providing a kind of applies to multiple concrete sample the test unit that lasting axle draws damage load, reduces the workload of test; And can remove by fast dismantling, turnover uses.
The utility model is achieved in that and a kind ofly applies to multiple concrete sample the test unit that lasting axle draws damage load, and described test unit comprises: at least three reaction frames, entablatures, one load distribution beam, multiple serial connection connecting link, at least two whorl brace rods, four spacing fasteners, a gear type jack, a pressure transducer and pressure sensor readings instrument; Described three reaction frame side by side parallel are arranged, and described entablature is erected at the top of three reaction frames; Described whorl brace rod is fixed by nut through after entablature, and whorl brace rod is positioned at the centre of adjacent two reaction frames; Described whorl brace rod hangs multiple concrete samples, form a concrete sample string, described whorl brace rod afterbody is connected with first concrete sample in concrete sample string, connected by described serial connection connecting link between adjacent two concrete samples, in concrete sample string, last concrete sample is connected with the bayonet socket in described loading distribution beam by serial connection connecting link; Described loading distribution beam transverse strands is located at below the lower beam column of three reaction frames, arranges described gear type jack bottom the lower beam column of middle reaction frame and between loading distribution beam; Spacing fastener is welded in the top flange loading distribution beam two ends between two; Described pressure transducer is arranged on gear type jack, and described pressure sensor readings instrument is connected with described pressure transducer.
Further, it is identical that described distribution beam stop means comprises two structures, and symmetrically arranged limit assembly, described limit assembly comprises: the vertical rod of two band grooves, two pulleys and a depression bar; Described spacing fastener is set in vertical rod, and described depression bar is erected between two spacing fasteners, and described loading distribution beam is positioned at below depression bar, and between two vertical rods; Described pulley is installed in the both sides of described loading distribution beam, and allows in the groove of the vertical vertical rod of pulley in distribution beam stop means and move.
Further, described concrete sample comprises a test specimen mould, two connection draw-in grooves and a cruciform card slot type fixed mount; Described two connection draw-in grooves are symmetricly set in test specimen mould; Described connection draw-in groove comprises the steel plate layer with bayonet, structural adhesive layer and the concrete layer that set gradually; Described cruciform card slot type fixed mount comprises a long limit and a minor face, and described minor face both ends all arrange a draw-in groove, the draw-in groove that both ends, long limit are arranged before and after being provided with two; Two draw-in grooves of described minor face are connected with left and right two wall of test specimen mould, and two front bayonet slots on described long limit are connected with front and back two wall of test specimen mould, and after two of long limit, connection draw-in groove is fixed spacing in test specimen mould by draw-in groove.
Further, described loading distribution beam is " work " font.
Further, the afterbody of described whorl brace rod is provided with " one " font positive stop strip.
Further, the rear and front end of described serial connection connecting link is provided with " one " font positive stop strip.
The utility model tool has the following advantages: the utility model is the structural form of tension built-in fitting, and multiple concrete sample strings by it, and the center of guaranteeing each concrete sample is together on straight line; Guarantee to apply not produce bias in the pulling force process of axle center.Guarantee holding in lotus process, load keeps stable, thus improves and apply to concrete sample the degree of accuracy that lasting axle draws the test of damage load, and decreases the workload of test.
Accompanying drawing explanation
Fig. 1 is existing cylinder center pre-buried deformed bar tension test unit.
Existing chuck carries out axial tension test unit to Fig. 2.
Fig. 3 is existing pre-buried rod-pulling type axis pulling experiment installation drawing.
Fig. 4 is existing test piece end built-in type dumb-bell shape test specimen.
Fig. 5 is existingly clamped in testing machine and carries out axle center tensile test.
Fig. 6 is the structural representation of test unit of the present utility model.
Fig. 7 is the structural representation of distribution beam stop means of the present utility model.
Fig. 8 is the structural representation of concrete sample of the present utility model together with circular sleeve assembling.
Fig. 9 is the structural representation of connection draw-in groove of the present utility model.
Figure 10 is the cross sectional representation of connection draw-in groove of the present utility model.
Figure 11 is cruciform card slot type fixed rack structure schematic diagram of the present utility model.
Figure 12 is the syndeton schematic diagram of entablature of the present utility model and whorl brace rod.
Sectional view after Figure 13 to be whorl brace rod lower end of the present utility model with concrete sample pre-buried be connected connection of draw-in groove.
Figure 14 is the structural representation of serial connection connecting link of the present utility model.
Embodiment
Refer to shown in Fig. 6 to Figure 14, of the present utility modelly a kind ofly apply to multiple concrete sample the test unit that lasting axle draws damage load, described test unit comprises: at least three reaction frame 1, entablatures 2, load distribution beam 3, spacing fastener 614, gear type jack 7, pressure transducer 8 of multiple serial connection connecting link 4, at least two whorl brace rod 5, distribution beam stop means 6, four and pressure sensor readings instrument 9; Described three reaction frame 1 side by side parallel are arranged, and described entablature 2 is erected at the top of three reaction frames 1; Described whorl brace rod 5 is fixed by nut through after entablature 2, and whorl brace rod 5 is positioned at the centre of adjacent two reaction frames; Described whorl brace rod 5 hangs multiple concrete samples 10, form a concrete sample string, described whorl brace rod 5 afterbody is connected with first concrete sample 10 in concrete sample string, connected by described serial connection connecting link 4 between adjacent two concrete samples 10, in concrete sample string, last concrete sample 10 is connected with the bayonet socket in described loading distribution beam 3 by serial connection connecting link 4; Described loading distribution beam 3 transverse strands is located at below the lower beam column 11 of three reaction frames 1, and be fixed by described distribution beam stop means 6, arrange described gear type jack 7 bottom the lower beam column 11 of middle reaction frame 1 and between loading distribution beam 3, spacing fastener 614 is welded in the top flange loading distribution beam two ends between two; Described pressure transducer 8 is arranged on gear type jack 7, and described pressure sensor readings instrument 9 is connected with described pressure transducer 8.
It is identical that described distribution beam stop means 6 comprises two structures, and symmetrically arranged limit assembly 61, described limit assembly 61 comprises: vertical rod 611, two pulleys 612 of two band grooves and a depression bar 613; Described spacing fastener 614 is set in vertical rod 611, and described depression bar 613 is erected between two spacing fasteners 614, and described loading distribution beam 3 is positioned at below depression bar 613, and between two vertical rods 611; Described pulley 612 is installed in the both sides of described loading distribution beam 3, and allows in the groove of the vertical vertical rod 611 of pulley 612 in distribution beam stop means 6 and move.
Described concrete sample 10 comprises a test specimen mould 101, two and connects draw-in groove 102 and a cruciform card slot type fixed mount 103; Described two connection draw-in grooves 102 are symmetricly set in test specimen mould 101; Described connection draw-in groove 102 comprises the steel plate layer with bayonet 1021, structural adhesive layer 1022 and the concrete layer 1023 that set gradually; Described cruciform card slot type fixed mount 103 comprises long limit 1031 and a minor face 1032, and described minor face 1032 both ends all arrange a draw-in groove 10321, the draw-in groove 10311 that both ends, long limit 1031 are arranged before and after being provided with two; Two draw-in grooves 10321 of described minor face 1032 are connected with left and right two wall of test specimen mould 101, two front bayonet slots on described long limit 1031 are connected with front and back two wall of test specimen mould 101, and after two of long limit 1031, connection draw-in groove 102 is fixed spacing in test specimen mould 101 by draw-in groove.Wherein, pre-buried fixing simple and convenient, the accurate positioning of draw-in groove 102 is connected.For accurate location and the convenient fixing of built-in fitting, devise a cruciform card slot type fixed mount 103, fixed by 4 notches and test specimen mould 101 wall, can ensure that cruciform card slot type fixed mount 103 is not moved and reverses; Meanwhile, the notch on cruciform card slot type fixed mount 103 is connected draw-in groove 102 again notch with built-in fitting is interconnected, thus guarantees that built-in fitting connects draw-in groove 102 and is not moved and reverses.Meanwhile, owing to being all connected by notch between each part, built-in fitting connects draw-in groove 102 and can locate fast and accurately.In addition, cruciform card slot type fixed mount 103 can be removed immediately after test specimen mould 101 builds full concrete, and turnover uses.
Wherein, described connection draw-in groove 102 comprises the steel plate layer with bayonet 1021, structural adhesive layer 1022 and the concrete layer 1023 that set gradually.The form adopting band bayonet socket steel plate layer 1021 to combine with concrete layer 1023, can reduce the loss of concrete sample 10 tensile bearing capacity to a certain extent; Simultaneously by the sectional area of control linkage draw-in groove 102, cross section is enable to bear the axle center damage load of plan applying.
In the utility model, described loading distribution beam 3 is " work " font.The afterbody of described whorl brace rod 5 is provided with " one " font positive stop strip 51.The rear and front end of described serial connection connecting link 4 is provided with " one " font positive stop strip 51, by positive stop strip 51 thus serial connection connecting link 4 can two concrete samples 10 of card main adjacent.
The utility model can simultaneously to multiple concrete sample applying in age morning axle center pulling force.In order to be strung by multiple early-age concrete test specimen and ensure vertical, devise the form that draw-in groove connects.This connection makes rod member be connected with the bayonet socket of draw-in groove by being rotationally connected bar, and bayonet socket also for adjustment, thus can guarantee that each test specimen is on a perpendicular line in reserved certain space.By arranging reaction frame, whorl brace rod, beading rod, gear type jack, pressure transducer, pressure sensor readings instrument, loading distribution beam and distribution beam stop means etc., apply axial load to multiple concrete sample.Its key point is: ensure that loading distribution beam does not rotate and tilt by distribution beam stop means, include the vertical rod of band groove, pulley, depression bar and spacing fastener, respectively pulley is installed in distribution beam both sides, and allow in the groove of the vertical vertical rod of pulley in distribution beam stop means and move, ensure that horizontal distribution beam does not rotate on the one hand, then reflect that loading distribution beam occurs tilting when pulley contacts with the groove walls of vertical rod vertical in distribution beam stop means on the other hand, now distribution beam is made to get back to horizontal level by threaded rod nut on adjustment crossbeam, namely the permissible error stop means that the groove on stop means tilts as crossbeam.
In addition, the utility model keeps multiple early-age concrete test specimen axial tension load for a long time.By arranging reaction frame, entablature, gear type jack, pressure transducer, loading distribution beam and distribution beam stop means, its axle center pulling force is kept for a long time to two string concrete samples.It is characterized in that: hold lotus measure by pinning gear type jack as first, distribution beam position limit device holds lotus safeguard measure as second.Wherein, lotus measure of holding in distribution beam stop means is made up of gear type jack and two spacing fasteners and depression bar, depression bar is connected with two spacing fasteners, and be welded on distribution beam before loading, in loading procedure, distribution beam stop means moves together with distribution beam, after being added to predetermined load, tightens spiral shell bolt, limited the motion loading distribution beam by the pressure of gear type jack and the friction force between fastener and vertical rod, and decrease the workload of test.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (6)
1. the test unit that lasting axle draws damage load is applied to multiple concrete sample, it is characterized in that: described test unit comprises: at least three reaction frames, entablatures, load distribution beam, multiple serial connection connecting link, at least two whorl brace rods, four spacing fasteners, a gear type jack, a pressure transducer and pressure sensor readings instrument; Described three reaction frame side by side parallel are arranged, and described entablature is erected at the top of three reaction frames; Described whorl brace rod is fixed by nut through after entablature, and whorl brace rod is positioned at the centre of adjacent two reaction frames; Described whorl brace rod hangs multiple concrete samples, form a concrete sample string, described whorl brace rod afterbody is connected with first concrete sample in concrete sample string, connected by described serial connection connecting link between adjacent two concrete samples, in concrete sample string, last concrete sample is connected with the bayonet socket in described loading distribution beam by serial connection connecting link; Described loading distribution beam transverse strands is located at below the lower beam column of three reaction frames, arranges described gear type jack bottom the lower beam column of middle reaction frame and between loading distribution beam; Spacing fastener is welded in the top flange loading distribution beam two ends between two; Described pressure transducer is arranged on gear type jack, and described pressure sensor readings instrument is connected with described pressure transducer.
2. according to claim 1 to multiple concrete sample apply lasting axle draw damage load test unit, it is characterized in that: it is identical that described distribution beam stop means comprises two structures, and symmetrically arranged limit assembly, described limit assembly comprises: the vertical rod of two band grooves, two pulleys and a depression bar; Described spacing fastener is set in vertical rod, and described depression bar is erected between two spacing fasteners, and described loading distribution beam is positioned at below depression bar, and between two vertical rods; Described pulley is installed in the both sides of described loading distribution beam, and allows in the groove of the vertical vertical rod of pulley in distribution beam stop means and move.
3. according to claim 1 the test unit that lasting axle draws damage load is applied to multiple concrete sample, it is characterized in that: described concrete sample comprise a test specimen mould, two connect draw-in grooves and a cruciform card slot type fixed mount; Described two connection draw-in grooves are symmetricly set in test specimen mould; Described connection draw-in groove comprises the steel plate layer with bayonet, structural adhesive layer and the concrete layer that set gradually; Described cruciform card slot type fixed mount comprises a long limit and a minor face, and described minor face both ends all arrange a draw-in groove, the draw-in groove that both ends, long limit are arranged before and after being provided with two; Two draw-in grooves of described minor face are connected with left and right two wall of test specimen mould, and two front bayonet slots on described long limit are connected with front and back two wall of test specimen mould, and after two of long limit, connection draw-in groove is fixed spacing in test specimen mould by draw-in groove.
4. according to claim 1 to multiple concrete sample apply lasting axle draw damage load test unit, it is characterized in that: described loading distribution beam is " work " font.
5. according to claim 1 to multiple concrete sample apply lasting axle draw damage load test unit, it is characterized in that: the afterbody of described whorl brace rod is provided with " one " font positive stop strip.
6. according to claim 1 to multiple concrete sample apply lasting axle draw damage load test unit, it is characterized in that: the rear and front end of described serial connection connecting link is provided with " one " font positive stop strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952931.1U CN205175824U (en) | 2015-11-25 | 2015-11-25 | Apply test device that lasting axle drew damage load to a plurality of concrete samples |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520952931.1U CN205175824U (en) | 2015-11-25 | 2015-11-25 | Apply test device that lasting axle drew damage load to a plurality of concrete samples |
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| CN205175824U true CN205175824U (en) | 2016-04-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277442A (en) * | 2015-11-25 | 2016-01-27 | 福建工程学院 | Testing device and method for applying lasting axial tension loads to plurality of concrete test pieces |
| CN108519275A (en) * | 2018-03-15 | 2018-09-11 | 中国工程物理研究院化工材料研究所 | A kind of small tonnage multi-path pressure load testing machine |
| CN109001559A (en) * | 2018-06-19 | 2018-12-14 | 西北工业大学 | It is sintered the efficient energizing test device of nano silver node electricity system damage |
| CN111141627A (en) * | 2019-12-27 | 2020-05-12 | 太原理工大学 | Concrete creep test loading device considering car-induced cyclic load effect |
-
2015
- 2015-11-25 CN CN201520952931.1U patent/CN205175824U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277442A (en) * | 2015-11-25 | 2016-01-27 | 福建工程学院 | Testing device and method for applying lasting axial tension loads to plurality of concrete test pieces |
| CN105277442B (en) * | 2015-11-25 | 2018-01-09 | 福建工程学院 | Multiple concrete samples are applied with experimental rig and method that lasting axle draws load |
| CN108519275A (en) * | 2018-03-15 | 2018-09-11 | 中国工程物理研究院化工材料研究所 | A kind of small tonnage multi-path pressure load testing machine |
| CN108519275B (en) * | 2018-03-15 | 2020-09-01 | 中国工程物理研究院化工材料研究所 | Small-tonnage multichannel pressure loading test device |
| CN109001559A (en) * | 2018-06-19 | 2018-12-14 | 西北工业大学 | It is sintered the efficient energizing test device of nano silver node electricity system damage |
| CN111141627A (en) * | 2019-12-27 | 2020-05-12 | 太原理工大学 | Concrete creep test loading device considering car-induced cyclic load effect |
| CN111141627B (en) * | 2019-12-27 | 2022-10-04 | 太原理工大学 | Concrete creep test loading device considering car-induced cyclic load effect |
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