CN205910072U - Cant chisei concrete test device - Google Patents

Cant chisei concrete test device Download PDF

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Publication number
CN205910072U
CN205910072U CN201620888690.3U CN201620888690U CN205910072U CN 205910072 U CN205910072 U CN 205910072U CN 201620888690 U CN201620888690 U CN 201620888690U CN 205910072 U CN205910072 U CN 205910072U
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China
Prior art keywords
plate
peg
concrete
cavity
connector
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CN201620888690.3U
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Chinese (zh)
Inventor
邹传龙
莫莾
陈艳艳
梁丽君
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Nanning University
Nanning Institute
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Nanning Institute
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Abstract

The utility model discloses a cant chisei concrete test device, test device include the base and measure the setting element, the base contains parallel upper head plate (1) and lower end plate (2), is connected with connecting piece (4) perpendicularly between upper head plate (1) and lower end plate (2), has in connecting piece (4) cavity (3), has all opened the through -hole on upper head plate (1) and lower end plate (2), and through -hole and cavity (3) intercommunication, have on the measurement setting element (5) a plane (6), end plate (2) length under plane (6) length more than or equal to, plane (6) center is opened porosely. When experimental, put into cavity (3) and concrete -filled with cant chisei (9), then carry out tensile testing. The utility model discloses can evaluate the cant chisei concrete body of test under the different parameter conditions is tensile properties, lays the basis for the failure mechanism who further studies the cant chisei concrete.

Description

A kind of peg concrete test device
Technical field
This utility model is related to the tension test under peg and concrete effect system, belongs to mechanics properties testing field.
Background technology
Peg (electric arc stud welding with socket cap weld nail) as the most commonly used connector in current engineering construction field, with it Easy construction, the feature of low cost is that numerous engineers and technicians know.At present, the research of peg is concentrated mainly on and is made For shear connector aspect, analyze its anti-shear performance and failure mechanism, and peg itself be limited only to for tensile property, Have ignored its specific working environment, that is, peg is typically and coagulation soil interaction.
Progressively promote fabricated construction along with country in building trade, the design of concrete prefabricated element can increasingly Many, become increasingly complex, the peg of connector and the effect system of concrete will be related among these, this is accomplished by considering As the mechanics property analysis when acting on concrete for the peg of connector, such as act on different strength concrete, And for example act on the xoncrete structure of different cross section, take the lead for another example or bare headed or threaded difference peg and coagulation Soil effect etc., these are required for doing strict test, it is also necessary to take into account that the buried depth of peg, peg section and concrete in test The variables such as the ratio in section, and existing test device and method are also not involved with the problems referred to above.
Chinese patent cn203606214u (2014.05.21) discloses a kind of welding screw tension test clamping device, its By welding, peg is fixed on test specimen, then test specimen is clamped by pressing plate and base plate, thus completing drawing process.
Chinese patent cn103234814b (2015.09.30) discloses a kind of welding of peg tensile test fixture and its draws Stretching method, peg top is fixed by clamping breach, and Interal fixation is passed through in bottom, thus completing drawing process.
Chinese patent cn201765073u (2011.03.16) discloses a kind of pin detecting device, and this device passes through wedge Block, screw and upper and lower loading head realize the stretching detection of peg.
Therefore, stretching stress is also a factor leading to this attachment structure to lose efficacy, so design is a set of is applied to peg It is necessary with the tensile test apparatus of xoncrete structure and test method for studying its failure mechanism.
Content of the invention
The technical problems to be solved in the utility model is: provides a kind of peg concrete test device, for assessment test (such as cavity cross section is different, and strength grade of concrete is different, and the ratio of peg section and concrete section is or not different parameters condition With, peg buried depth is not equal) under peg concrete system tensile property, further study peg concrete failure mechanism.
The technical solution of the utility model is as follows:
A kind of peg concrete test device, including base and measurement and positioning part, described base comprises parallel upper head plate And bottom plate, it is vertically connected with connector between upper head plate and bottom plate, have in connector on cavity, upper head plate and bottom plate all Have through hole, and through hole is connected with cavity;One plane is had on described measurement and positioning part, described plane length is more than or equal to bottom plate Length, described planar central has hole.
The cross section outline of described upper head plate and bottom plate is circular or regular polygon.
Described connector is assembly, that is, be divided into upper and lower two combiners, is connected by screw thread or pin etc..
The outline of described connector cross section is circular or regular polygon.
Further, the cross section of connector is variable cross-section or uiform section, and its wall thickness is definite value or non-definite value.
Described cavity is the uiform section cavity of through-connections upper and lower end face, and described section is circular or regular polygon.
Further, cavity is section cavities.
Described measurement and positioning part longitudinal section is in ⊥ shape, and its vertical edge has the hole that is connected.
It is displacement meter between the plane of the upper surface of described bottom plate and measurement and positioning part.
Using being weldingly connected between upper head plate and bottom plate and connector.
A kind of peg using above-mentioned assay device draws Analysis of Concrete Tensile test method, comprises the following steps:
1. sample preparation, one end that peg is posted foil gauge passes through in the through hole insertion cavity of upper head plate, then into cavity Casting concrete is concordant with the upper surface of upper head plate until concrete upper surface, and the other end of peg passes through the flat of measurement and positioning part Hole on face is simultaneously fixed thereto, is symmetrical arranged two displacement meters with regard to peg, whole process guarantees bolt between plane and bottom plate The axis of nail and upper head plate, the axis of bottom plate and cavity overlaps;
2. fill sample, the free end of peg is connected with the upper grip of universal tensile testing machine, bottom plate by steel pipe and under Chuck connects;
3. load, in elastic range with the 1/4 of peg yield load, 2/4,3/4 load repeat stretch-draw is carried out to peg Load, unload repeatedly (such as 3 times, 4 times, concrete number of times can adjust according to EXPERIMENTAL DESIGN), then tensioning is until peg destroys.
4. sample cutting, connector is cut open (outer wall cutting connector vertically), retains complete in cavity Xoncrete structure.
In sample preparation step, described foil gauge includes two groups of foil gauges of axial and circumferential, and described peg includes that light is round and spiral shell Stricture of vagina type (i.e. whether bar portion is threaded, not threaded round for light).
In sample preparation step, select a series of combination sample preparations different from cavity cross section diameter ratio of upper head plate through-hole aperture.
Peg is combined with concrete by this utility model by base, by converting the cross sectional shape of connector cavity, or Person's upper head plate through-hole aperture and cavity cross section diameter ratio, or strength grade of concrete, or peg buried depth, or peg section With the ratio of concrete section, or peg buys in the parameters such as depth, thus obtaining dissimilar peg (light under different condition Round or screw-type) tension failure numerical value, for studying fracture mechanism under peg-concrete system further, set up inefficacy mould Type lays the first stone.
Brief description
Fig. 1 is tensile test apparatus structural representation of the present utility model;
Fig. 2 is that in this utility model, connector section is circular and cavity cross section is that tensile test apparatus during circle are illustrated Figure;
Fig. 3 is the exploded perspective view of Fig. 2;
Fig. 4 is the peg structure schematic diagram of multi-form;
Fig. 5 and Fig. 6 is connector and the cavity structure schematic diagram of multi-form.
Specific embodiment
As shown in figure 1, being the basic pie graph of this utility model assay device, including base and measurement and positioning part 5, base Comprise parallel upper head plate 1 and bottom plate 2, upper head plate 1 and bottom plate 2 are the rectangle steel plate of one piece of center opened hole, on Be vertically connected with connector 4 between end plate 1 and bottom plate 2, connector 4 is steel pipe, the cavity 3 in connector 4 and upper head plate 1 and Through hole connection on bottom plate 2, be threaded in the through hole of bottom plate 2 (during stretching, can be by screwed for radicle steel Pipe or rod iron screw in wherein, are then connected with the lower chuck of stretching-machine);Measurement and positioning part 5 is the steel that one piece of longitudinal section is in ⊥ shape Quality structure part, lower surface is plane 6, and plane 6 length is equal to bottom plate 2 length, and (length here refers in structural member three-dimensional dimension Maximum size), plane 6 center has hole, for through peg 9.Have on the vertical edge of ⊥ shape measurement and positioning part 5 row with regard to Centrosymmetric circular hole.
As shown in Fig. 2 by upper head plate 1, steel tubular connector 4 and bottom plate 2 are formed by welding base, and moulding is similar to coiling Disk is it is ensured that the central axis of steel tubular connector 4 is overlapped with the centrage of upper and lower end plate.Divide close to 4 vertex angle parts on bottom plate 2 Have bolt connecting hole.When preparing sample, select light round or screw-type peg 9, sticking axial and circumferential in peg 9 bar portion should Become piece 13, its head one end through hole through upper head plate 1 is put in the cavity 3 of steel tubular connector 4, then pours in cavity 3 Build concrete, the flush of plane and upper head plate 1 on concrete, to be solidified after, using the bolts at the angle of 2 four ends of bottom plate Hole and bolt reconnect one piece of bottom plate 2 with size thereunder, outer with band using threaded in bottom plate 2 through hole The rod iron 10 of screw thread.A pair of displacement meter 8 is placed, using a pair of c clevis on the upper surface of bottom plate 2 and in the both sides of connector 4 Two coinciding edges of 11 two pieces of bottom plate 2 non-displacement meters 8 of clamping.The top of peg 9 passes through the plane of measurement and positioning part 5 lower end The hole of 6 centers, and fixing with the hole 7 that is connected on securing member 12 fitted bolt and vertical edge, guarantee displacement when fixing Count 8 upper and lower ends to fit with the plane 6 of measurement and positioning part 5 and the upper surface of bottom plate 2 respectively.The free end of peg 9 and stretching The upper grip of testing machine connects, and rod iron 10 is connected with lower chuck.
When preparing sample, different types of parameter combination may be selected, including following aspect:
1. different types of peg 9, such as light is round and screw-type, as shown in Figure 4;
2. the outer wall profile (uiform section or variable cross-section) of connector 4 is different or wall thickness is different, cross sectional shape (etc. of cavity 3 Section or variable cross-section) different, such as Fig. 5 and Fig. 6;
3. the upper surface external diameter of cavity 3 is serial from the different ratio of external diameter of upper head plate 1 central through hole;
4. in peg 9 insertion connector 4, depth is different;
5. the diameter of peg 9 ratio different from connector 4 minimum outer diameter series.
6. different strength grade of concrete.
Above parameter can arbitrarily mashed up combination, such as 1. and 2., 5., 3. and 4. etc..
During tensile loads, in elastic range, weight is carried out with 1/4,2/4,3/4 load of peg 9 yield load to peg 9 Multiple tensioning loads, unloading is multiple (such as 3 times, 4 times, concrete number of times can adjust according to EXPERIMENTAL DESIGN), and then tensioning is up to peg Destroy.Detected the result meansigma methodss obtaining as the shift value tested using two displacement meters 8.After stretching terminates, will connect Part 4 is cut open, observes the failure conditions of cavity 3 inner concrete.
Draw initial stiffness, yield strength, tensile strength, maximum displacement, break by designing different tension test combinations The data such as bad form, then analysis modeling, derive and set up peg and the failure model of xoncrete structure.

Claims (7)

1. a kind of peg concrete test device it is characterised in that: include base and measurement and positioning part (5), described base comprises Parallel upper head plate (1) and bottom plate (2), are vertically connected with connector (4), connector between upper head plate (1) and bottom plate (2) (4) have in and all have through hole on cavity (3), upper head plate (1) and bottom plate (2), and through hole is connected with cavity (3);Described measurement One plane (6) is had on keeper (5), described plane (6) length is more than or equal to bottom plate (2) length, and described plane (6) center is opened There is hole.
2. a kind of peg concrete test device according to claim 1 it is characterised in that: described upper head plate (1) and under The cross section outline of end plate (2) is circular or regular polygon.
3. a kind of peg concrete test device according to claim 1 it is characterised in that: described connector (4) is transversal The outline in face is circular or regular polygon.
4. a kind of peg concrete test device according to claim 1 it is characterised in that: described cavity (3) be run through The uiform section cavity of connector (4) upper and lower end face, described section is circular or regular polygon.
5. a kind of peg concrete test device according to claim 1 it is characterised in that: described measurement and positioning part (5) Longitudinal section is in ⊥ shape, and its vertical edge has the hole that is connected (7).
6. a kind of peg concrete test device according to claim 1 it is characterised in that: described bottom plate (2) upper It is displacement meter (8) between the plane (6) of surface and measurement and positioning part.
7. a kind of peg concrete test device according to claim 1 it is characterised in that: upper head plate (1) and bottom plate (2) using being weldingly connected and connector (4) between.
CN201620888690.3U 2016-08-15 2016-08-15 Cant chisei concrete test device Active CN205910072U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620888690.3U CN205910072U (en) 2016-08-15 2016-08-15 Cant chisei concrete test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620888690.3U CN205910072U (en) 2016-08-15 2016-08-15 Cant chisei concrete test device

Publications (1)

Publication Number Publication Date
CN205910072U true CN205910072U (en) 2017-01-25

Family

ID=57800487

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620888690.3U Active CN205910072U (en) 2016-08-15 2016-08-15 Cant chisei concrete test device

Country Status (1)

Country Link
CN (1) CN205910072U (en)

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