CN204718888U - A kind of regeneration concrete TERM DEFORMATION test loads and measurement mechanism - Google Patents
A kind of regeneration concrete TERM DEFORMATION test loads and measurement mechanism Download PDFInfo
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- CN204718888U CN204718888U CN201520389351.6U CN201520389351U CN204718888U CN 204718888 U CN204718888 U CN 204718888U CN 201520389351 U CN201520389351 U CN 201520389351U CN 204718888 U CN204718888 U CN 204718888U
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Abstract
The utility model discloses the test of a kind of regeneration concrete TERM DEFORMATION to load and measurement mechanism, comprise special-shaped cushion cap, two reference columns that can slide in the horizontal direction relative to special-shaped cushion cap are provided with above described special-shaped cushion cap, top common support component of two described reference columns, the top of described component is provided with charger; The adjustable dial gauge in multiple position is provided with between described two reference columns.The utility model can require to load the diverse location of component according to different loadings, realizes three branches and loads or partially load, thus improve the usable range of loading and measurement mechanism; Utilizing lever principle the general assembly (TW) of balancing weight can be amplified certain multiple is applied on component to be measured, whole device forms a self-balancing system, ensure that component load under action of long-term load is invariable, method of operating facilitates feasible, make measurement result more close to actual conditions, the conclusion drawn has more cogency.
Description
Technical field
The utility model relates to a kind of loading and measurement mechanism, is specifically related to the test of a kind of regeneration concrete TERM DEFORMATION and loads and measurement mechanism.
Background technology
The in good time of regeneration concrete proposes the problem solving the process of flood tide building waste on the one hand, makes again building waste be recycled production building material on the other hand, has not only saved a large amount of natural resources, and reduced the energy consumption of production.Therefore, this environmentally friendly building materials and relevant technical research become the focus of current civil engineering work building materials development, the cement cementitious body minute aperture existed due to regenerated coarse aggregate surface in regeneration concrete and micro-crack, the change of Recycled Concrete Beams its amount of deflection under the effect of long term constant load and normal concrete beams be there are differences, but it is domestic few to research in this respect, and the change of amount of deflection has very important impact to Recycled Concrete Beams long-term behaviour and permanance, therefore the measurement of Recycled Concrete Beams amount of deflection under long term constant load action just seems particularly important.
The measurement of current Recycled Concrete Beams amount of deflection under long term constant load action has several frequently seen survey method such as lifting jack pressurization, big spring force method and the direct method of piling of weight etc.For lifting jack pressurization, limitation due to lifting jack self structure causes the phenomenon easily occurring " oil return " in long-term pressure process, and after component amount of deflection changes, the support distances of lifting jack is elongated, jack pressure value is changed, thus can not meet component load under action of long-term load this key request constant.For big spring force method, after component amount of deflection changes, the length of big spring is changed, thus can not ensure that the load applied to component keeps constant equally.For the direct method of piling of weight, pile up and load to reach huge force value, very high to the density requirements piling up weight, very strict to the requirement of test site, implementation process is very difficult, load mode is dumb, component is piled up a large amount of weight and brings the problems such as very large potential safety hazard to the measuring process of component.
Summary of the invention
For above-mentioned problems of the prior art or defect, the purpose of this utility model is, provides a kind of regeneration concrete constant load deformation test loading and measurement mechanism.
To achieve these goals, the utility model adopts following technical scheme:
A kind of regeneration concrete TERM DEFORMATION test loads and measurement mechanism, comprise special-shaped cushion cap, two reference columns that can slide in the horizontal direction relative to special-shaped cushion cap are provided with above described special-shaped cushion cap, top common support component of two described reference columns, the top of described component arranges charger;
The adjustable dial gauge in multiple position is provided with between described two reference columns.
Further, described special-shaped cushion cap is provided with chute along its Width, and described reference column can along slide.
Particularly, described charger comprises and being horizontally disposed with and the girder steel vertical with described component, and described girder steel one end is connected with special-shaped cushion cap by the steel arm vertically arranged, and girder steel is connected with steel arm is movable; Below the other end of described girder steel, weighted platform is installed.
Further, a distribution beam is provided with between described girder steel and component; Be provided with circular shaft bearing and triangular support base between described distribution beam and component, described circular shaft bearing and triangular support base are symmetrical arranged about distribution beam centre position.
Particularly, be provided with multiple bearing between described two reference columns, described bearing along slide, described bearing can install described dial gauge.
Further, triangular support base is provided with between described reference column and component.
Alternatively, described girder steel is connected by pin with steel arm.
Alternatively, described special-shaped cushion cap is symmetrical polygon.
Compared with prior art, the utility model has following technique effect:
1, arrange reference column for supporting the component of top, its position can adjust according to the size of different component, makes two reference columns lay respectively at the below at component two ends with supporting member; Regulate the position of reference column and member integrated, make charger can require according to different loadings to load the diverse location of component, realize three branches and load or partially load, thus improve the usable range of loading and measurement mechanism.
2, charger is set, utilizing lever principle the general assembly (TW) of balancing weight can be amplified certain multiple is applied on component to be measured, whole device forms a self-balancing system, ensure that component load under action of long-term load is invariable, method of operating facilitates feasible, make measurement result more close to actual conditions, the conclusion drawn has more cogency; Substantially increase the accuracy to recycled concrete component deflection metrology under action of long-term load and convenience, overcome the defect of existing method operation difficulty, low precision.
3, multiple bearing is set, the position of dial gauge can be adjusted according to tested point position, make point position flexible arrangement, loading position different from component coordinates convenient, the measurement requirement of component diverse location deflection value can be met, improve the dirigibility of measurement.
4, arranging special-shaped cushion cap is the polygon deformed bar concrete bearing platform connected, and ensures that reference column has sufficiently long displacement on special-shaped cushion cap, makes reference column can support the component of different size; And special-shaped cushion cap extends along girder steel length direction part, thus enable special-shaped cushion cap bear the moment of flexure brought in loading procedure, ensure the stability of whole experimental provision.
Accompanying drawing explanation
Fig. 1 is front elevation of the present utility model;
Fig. 2 is vertical view of the present utility model;
Fig. 3 is side view of the present utility model;
Number in the figure represents: 1-steel rib, 2-hook, 3-weighted platform, 4-girder steel, 5-component, 6-special-shaped cushion cap, 7-plain bar, 8-reference column, 9-steel arm, 10-chute, 11-distribution beam, 12-circular shaft bearing, 13-triangular support base, 14-bearing, 15-bearing presss from both sides, 16-dial gauge, 17-triangular support base.
Below in conjunction with the drawings and the specific embodiments scheme of the present utility model done and explain in further detail and illustrate.
Embodiment
Defer to technique scheme, see Fig. 1-3, regeneration concrete TERM DEFORMATION test of the present utility model loads and measurement mechanism, comprise special-shaped cushion cap 6, two reference columns 8 that can slide in the horizontal direction relative to special-shaped cushion cap 6 are provided with above described special-shaped cushion cap 6, top common support component 5 of two described reference columns 8, the top of described component 5 is provided with charger; The adjustable dial gauge in multiple position 16 is provided with between described two reference columns 8.
Described component 5 is a bar shaped beams of concrete, and its length direction is parallel to the line of described two reference columns 8.
Described charger is used for applying pressure to component 5; Described two reference columns 8 are for supporting the component 5 of top, and its position can adjust according to the size of different component 5, makes two reference columns 8 lay respectively at the below at component 5 two ends with supporting member 5.
After two reference columns 8 and the relative position of component 5 are fixing, the position of adjustable reference column 8 and component 5 entirety, make charger can require according to different loadings to load the diverse location of component 5, realize three branches load or partially load, thus improve the usable range of loading and measurement mechanism.
Described dial gauge 16 is for measuring the deflection value of component 5, dial gauge 16 position can adjust according to tested point position, makes point position flexible arrangement, and loading position different from component 5 coordinates convenient, the measurement requirement of component diverse location deflection value can be met, improve the dirigibility of measurement.
Particularly, described special-shaped cushion cap 6 is provided with chute 10 along its Width, and described reference column 8 can slide along chute 10, and described chute 10 is arranged with two in parallel.Cross-sectional area 20mm × the 20mm of described special-shaped cushion cap 6 upper hopper chute 10, length is 2200mm, employing same size
section steel manufacture forms.Described reference column 8 slides along chute 10, makes the spacing change between 2 reference columns 8 flexible, easy to operate.
Particularly, described charger comprises and being horizontally disposed with and the girder steel 4 vertical with described component 5, and described girder steel 4 one end is connected with special-shaped cushion cap 6 by the steel arm 9 vertically arranged, and girder steel 4 is connected with steel arm 9 is movable; Below the other end of described girder steel 4, weighted platform 3 is installed.The longitudinal section of described girder steel 4 is I-shaped.
A hook 2 is installed below described girder steel 4 one end, described hook 2 hangs weighted platform 3, described weighted platform 3 places different balancing weights as required.
Alternatively, be provided with a distribution beam 11 between described girder steel 4 and component 5, be provided with circular shaft bearing 12 and triangular support base 17 between described distribution beam 11 and component 5, described circular shaft bearing 12 and triangular support base 17 are symmetrical arranged about distribution beam 11 centre position.Described girder steel 4 will make a concerted effort to be divided into equal-sized component to load component 5 by distribution beam 11, circular shaft bearing 12 and triangular support base 17.
Described circular shaft bearing 12 and triangular support base 17 are jointly formed and support the freely-supported of distribution beam 11, and the vertical load that distribution beam 11 is born is divided equally and vertically transmits downwards.
Further, the centre position of described distribution beam 11 is positioned at directly over the centre position of component 5, and described circular shaft bearing 12 and triangular support base 17 lay respectively at directly over three branch positions of component 5, ensures that described girder steel 4 pairs of components 5 carry out three branch loadings.
Further, described girder steel 4 inside is provided with steel rib 1, to ensure the rigidity of girder steel 4 to component 5 force place; Described distribution beam 11 inside is provided with steel rib 1, to ensure the rigidity of distribution beam 11.
Further, be provided with multiple bearing 14 between described two reference columns 8, described bearing 14 can slide along chute 10, and described dial gauge 16 installed by described bearing 14.Described bearing 14, by the fixing dial gauge 16 of bearing folder 15, adjusts the position of dial gauge 16 by the position adjusting bearing 14.
Alternatively, described multiple bearing 14 is provided with 3, and corresponding dial gauge 16 is provided with 3, by adjusting the position of bearing 14, make the dial gauge 16 being positioned at centre position be in immediately below component 5 centre position, all the other two dial gauges 16 lay respectively at immediately below component 5 stress point.
Further, triangular support base 13 is provided with between described reference column 8 and component 5.The forced position accurately determining component 5 is convenient in the setting of described triangular support base 13.
Further, described girder steel 4 is connected by pin with steel arm 9, and girder steel 4 can be rotated relative to steel arm 9, is convenient to placement member 5 and distribution beam 11 below girder steel 4.
Particularly, described reference column 8 bottom surface is provided with two plain bars 7 along chute 10 length direction, and described plain bar 7 can slide along chute 10.
Described reference column 8 is of a size of 400mm × 400mm × 450mm, its manufacturing process is as follows: adopt four root type number to be φ 10, length is that the deformed bar of 450mm vertically distributes with rhombus, on the steel plate adopting pressure welding method to be welded on above-mentioned reinforcing bar bottom to be of a size of 400mm × 400mm × 10mm, again along the template at steel plate edge, form height is 450mm, then makes it shaping to template cast inside concrete; Finally, bottom steel plate, weld two root type number along chute direction pressure welding method is φ 20, and length is the plain bar of 400mm, and plain bar 7 is placed in chute 10 and ensures that reference column 8 can slide along chute 10.
Particularly, described bearing 14 bottom surface is provided with two plain bars 7 along chute 10 length direction, and described plain bar 7 can slide along chute 10.
The method for making of described bearing 14 is as follows: adopt a root type number to be φ 10, length is the steel plate center that the plain bar of 350mm is vertically welded on that is of a size of a 400mm × 50mm × 10mm, welding two root type number bottom steel plate along chute direction is φ 20, the plain bar of the 50mm that length is, plain bar is placed in chute 10 and ensures that bearing 14 can slide along chute 10.
Described special-shaped cushion cap 6 bottom surface is provided with many bending resistance reinforcing bars, and described bending resistance reinforcing bar cross interlocks, and in net distribution, described bending resistance reinforcing bar is used for bearing in loading procedure, to the huge Bending Moment that special-shaped cushion cap 6 brings, ensures that special-shaped cushion cap 6 normally works.
Described special-shaped cushion cap 6 is symmetrical polygon, alternatively, be provided with 10 limits, be respectively a1 ~ a10, see Fig. 3, the line of described limit a3 and a9 arranges described chute 10, ensures that reference column 8 has sufficiently long displacement on special-shaped cushion cap 6, make reference column 8 can support the component 5 of different size; The part of the special-shaped cushion cap 6 that described limit a5, a6 and a7 surround, makes special-shaped cushion cap 6 be extended along girder steel 4 length direction, thus makes special-shaped cushion cap 6 can bear the moment of flexure brought in loading procedure, ensure the stability of whole experimental provision.
Described special-shaped cushion cap 6 single side size is respectively the polygon deformed bar concrete bearing platform connected of 400mm × 1000mm × 400mm × 1000mm × 600mm × 400mm × 600mm × 1000mm × 400mm × 1000mm, be convenient to formwork make, and save a large amount of spaces while meeting measurement requirement.
Device whole height of the present utility model is 1800mm, and the widest part width is 2200mm, and the narrowest place is 400mm, length is 3300mm.
Regeneration concrete constant load deformation test loading of the present utility model and measurement mechanism, specific implementation process is as follows:
(1) according to " Standard for test methods of longterm performance and durability of ordinary concrete " requirement, make three sizes and be 400mm × 400mm × 2000mm, reinforcement manner is vertical muscle 4B12, stirrup φ 8@100.Test specimen concrete used is followed successively by normal concrete and the regeneration concrete of recycled coarse aggregate contents 0%, 50%, 100%, starts to carry out long-term load test research after putting into standard curing room maintenance 28d after being built by three test specimens.
(2) add the dark lubricating oil of 5mm in the chute 10 on special-shaped cushion cap 6, promote two reference columns 8, make spacing inside it be 1600mm, component 5 is moved on reference column 8.
(3) three bearings 14 are put into chute 10 successively, first bearing 14 is put to component 5 center, second bearing 14 and the 3rd bearing 14 are placed in immediately below component 5 liang of stress points respectively, then are placed on bearing 14 respectively by three dial gauges 16, fix with bearing folder 15.
(4) girder steel 4 is pressed in distribution beam 11 and loads making a concerted effort to be divided into two equal-sized component to carry out three branches to component 5, then on weighted platform 3, balancing weight is loaded, for preventing balancing weight in test of long duration process because water suction causes loading numerical value change, the concrete blocks of discarded more than 2 years being weighed again and demarcates as loading counterweight.With reference to " Standard for test methods of concrete structures " GB50152-92 requirement, first prestrain during test, prestrain is divided into three grades, every grade of loaded value is estimate total loaded value 5%, equipment debugging normally unloads afterwards, then stop loading when hierarchical loading to member bends fracture width reaches 0.2mm scope again and keep loading constant, thinking that now component is in serviceability limit state and holds lotus for a long time.Balancing weight general assembly (TW) added by three components to be measured is followed successively by G
1=1000kg, G
2=930kg, G
3=850kg.
See formula 1:
F
close=G × (L
2÷ L
1) formula 1
F
closerepresent the suffered size of making a concerted effort of component; G represents the weight of added balancing weight; L
2represent the distance between girder steel 4 force place and weighted platform 3; L
1represent the distance between girder steel 4 force place and steel arm 9.
In this test, L
2=4000mm, L
1=500mm, then three actual resultant pressures be subject to of component are respectively F
close 1=8000kg, F
close 2=7440kg, F
close 3=6800kg, the general assembly (TW) of balancing weight is amplified 8 times and is applied on component 5 by girder steel 4.
Then the registration reading three dial gauges 16 respectively carries out record, after this respectively at its deflection value of time measurement of the 40th day, 205 days, 508 days, 885 days, 1200 days, measures all by the orientation measurement determined at every turn, ensures that point position is constant.Three loading measuring processes are completely the same.
In above-mentioned test process, do not affect by slight perturbations after dial gauge 16 is fixing with component 5, in the measurement of long period, show the advantage of stability and good integrity.The test findings of loading of the present utility model and measurement mechanism is as shown in table 1:
Table 1 loads and the test findings of measurement mechanism
Remarks: in (1) test specimen title, x% represents recycled coarse aggregate contents, the such as test specimen of 50% expression regeneration concrete Replacement rate 50%; (2) dial gauge 1, dial gauge 2, dial gauge 3 represent three dial gauges that the utility model adopts respectively; (3) the dial gauge real time data read when Yd represents on-test Y days, the dial gauge data such as, recorded when 7d represents the 7th day on-test; (4) readout units of dial gauge 1, dial gauge 2, dial gauge 3 is millimeter mm.
Claims (8)
1. a regeneration concrete TERM DEFORMATION test loads and measurement mechanism, it is characterized in that, comprise special-shaped cushion cap (6), described special-shaped cushion cap (6) top is provided with two reference columns (8) that can slide in the horizontal direction relative to special-shaped cushion cap (6), top common support component (5) of two described reference columns (8), the top of described component (5) arranges charger;
The adjustable dial gauge in multiple position (16) is provided with between described two reference columns (8).
2. regeneration concrete TERM DEFORMATION test as claimed in claim 1 loads and measurement mechanism, it is characterized in that, described special-shaped cushion cap (6) is provided with chute (10) along its Width, and described reference column (8) can slide along chute (10).
3. regeneration concrete TERM DEFORMATION test as claimed in claim 1 loads and measurement mechanism, it is characterized in that, described charger comprises and being horizontally disposed with and the girder steel (4) vertical with described component (5), described girder steel (4) one end is connected with special-shaped cushion cap (6) by the steel arm (9) vertically arranged, and girder steel (4) is connected with steel arm (9) is movable; Weighted platform (3) is installed below the other end of described girder steel (4).
4. regeneration concrete TERM DEFORMATION test as claimed in claim 3 loads and measurement mechanism, it is characterized in that, is provided with a distribution beam (11) between described girder steel (4) and component (5); Be provided with circular shaft bearing (12) and triangular support base (17) between described distribution beam (11) and component (5), described circular shaft bearing (12) and triangular support base (17) are symmetrical arranged about distribution beam (11) centre position.
5. regeneration concrete TERM DEFORMATION test as claimed in claim 2 loads and measurement mechanism, it is characterized in that, multiple bearing (14) is provided with between described two reference columns (8), described bearing (14) can slide along chute (10), the dial gauge (16) described in the upper installation of described bearing (14).
6. regeneration concrete TERM DEFORMATION test as claimed in claim 4 loads and measurement mechanism, it is characterized in that, is provided with triangular support base (13) between described reference column (8) and component (5).
7. the regeneration concrete TERM DEFORMATION test as described in claim 3,4 or 6 loads and measurement mechanism, and it is characterized in that, described girder steel (4) is connected by pin with steel arm (9).
8. the regeneration concrete TERM DEFORMATION test as described in as arbitrary in claim 1 to 6 loads and measurement mechanism, it is characterized in that, described special-shaped cushion cap (6) be the polygon of symmetry.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN105841949A (en) * | 2016-05-16 | 2016-08-10 | 西安建筑科技大学 | Automatic control device and method for testing performance of flange node under bidirectional load combined action |
| CN108896406A (en) * | 2018-09-25 | 2018-11-27 | 贵州顺康路桥咨询有限公司 | A kind of concrete crushing strength and shrinkage and creep testing equipment |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
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2015
- 2015-06-05 CN CN201520389351.6U patent/CN204718888U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN105841949A (en) * | 2016-05-16 | 2016-08-10 | 西安建筑科技大学 | Automatic control device and method for testing performance of flange node under bidirectional load combined action |
| CN108896406A (en) * | 2018-09-25 | 2018-11-27 | 贵州顺康路桥咨询有限公司 | A kind of concrete crushing strength and shrinkage and creep testing equipment |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
| CN110470542B (en) * | 2019-09-12 | 2024-03-08 | 辽宁科技大学 | Durable loading device for load-holding reinforced concrete beam |
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