CN204302118U - A kind of expansive concrete tensile creep test device - Google Patents
A kind of expansive concrete tensile creep test device Download PDFInfo
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- CN204302118U CN204302118U CN201420714988.3U CN201420714988U CN204302118U CN 204302118 U CN204302118 U CN 204302118U CN 201420714988 U CN201420714988 U CN 201420714988U CN 204302118 U CN204302118 U CN 204302118U
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- test device
- support abutment
- creep test
- tensile creep
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Abstract
The utility model discloses a kind of expansive concrete tensile creep test device, comprise pinboard and be arranged on two collapsible forms on pinboard, the two ends of collapsible form are fixed with concrete anchor fixed end, concrete anchor fixed end is connected with directional bearing, directional bearing is connected with spiral tension bar, the spiral tension bar being positioned at left side is connected with jack and tension-compression sensor in turn through after left support abutment, the spiral tension bar being positioned at right side is connected with spring and backing plate in turn through after right support abutment, left support abutment is connected with reverse support, spiral tension bar is provided with the lock screw being positioned at reverse support, the utility model can provide concrete constant force lastingly by locking stretching rear spring, and tensile creep test test specimen can be built by straight forming, avoid and bring test error owing to installing, automatically the Creep Characteristics of test specimen under secondary pulling force effect can be gathered by tension-compression sensor, stable testing, easy to operate, efficient.
Description
Technical field
The utility model relates to a kind of expansive concrete uniaxial tension creep test device.
Background technology
Creeping is the intrinsic a kind of time variation energy of concrete, it is to xoncrete structure, particularly prestressed reinforced concrete construction has obvious impact, and the construction of expansive concrete extensive use overlong jointless structural, underground concrete structure self waterproofing etc. are by the engineering structure of seif-citing rate.
In the creep test process of routine, mostly pay close attention to without the Creep Characteristics research under constraint or compression, creep test device is also main to be designed under this condition.Test as the method for testing of recommending in: standard GB/T50082-2009 " normal concrete long-term behaviour and durability performance test method standard " and instrument are compression reaction frame of creeping.
For tensile creep device as application number 201310069909.8 " measuring method of tensile creep of early-age concrete and device ", its method mainly adopting fixing weight to stretch is carried out, its shortcoming is that test specimen is vertical placement, in drawing process, its value of creeping can be subject to the impact of self gravitation and deviation occurs, its tensile load applied must wait until that concrete strength reaches certain value and just can draw simultaneously, and be subject to the impact of hanging weight swing, be difficult to ensure that test specimen is in the state of axial tension.
Another kind of as application number 201410116179.7 " Analysis of Concrete Tensile creep test device and concrete shrinkage stress creep test method ", its tensile creep device many employings end, the method major defect is that end is adopted constraint framework and loaded by jack, constraint framework can lose concrete end in loading process on the one hand, and due to local destruction make tensile stress relaxation, test data deviation is large, tensile force cannot keep axial constant on the other hand, easily there is the impact of operation and test specimen installation.
Utility model content
The utility model object is for above-mentioned present situation, aims to provide a kind of tensile creep test device.
The utility model solves the technical scheme that its technical problem adopts: a kind of expansive concrete tensile creep test device, comprise pinboard and be arranged on two collapsible forms on pinboard, the two ends of collapsible form are fixed with concrete anchor fixed end, concrete anchor fixed end is connected with directional bearing, directional bearing is connected with spiral tension bar, the spiral tension bar being positioned at left side is connected with jack and tension-compression sensor in turn through after left support abutment, the spiral tension bar being positioned at right side is connected with spring and backing plate in turn through after right support abutment, left support abutment is connected with reverse support, spiral tension bar is provided with the lock screw being positioned at reverse support.
Described a kind of expansive concrete tensile creep test device, its collapsible form is arranged on pinboard by thread switch.
Described a kind of expansive concrete tensile creep test device, its pinboard is connected by bottom screw with left support abutment, right support abutment.
Described a kind of expansive concrete tensile creep test device, its spring is contacted with right support abutment by packing ring through one end after spiral tension bar, and the other end contacts with backing plate.
Described a kind of expansive concrete tensile creep test device, its pinboard is the hot rolling U-shaped steel sheet of the uniform screwed hole in the left and right sides.
Described a kind of expansive concrete tensile creep test device, its left support abutment and right support abutment are welded to form by bottom plate, transverse baffle and vertical gusseted plate, and described bottom plate is provided with screw hole.
Described a kind of expansive concrete tensile creep test device, its concrete anchor fixed end is made up of screw hole baffle plate and many lead screw being screwed in length and thickness on screw hole baffle plate different.
Described a kind of expansive concrete tensile creep test device, its directional bearing is made up of bearing pull bar and inner circular spheroid.
The beneficial effects of the utility model are: can provide concrete constant force lastingly by locking stretching rear spring, and tensile creep test test specimen can be built by straight forming, avoid and bring test error owing to installing, automatically the Creep Characteristics of test specimen under secondary pulling force effect can be gathered by tension-compression sensor, stable testing, easy to operate, efficient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model pinboard;
Fig. 3 is the structural representation of the utility model left support abutment;
Fig. 4 is the structural representation of the utility model right support abutment;
Fig. 5 is the structural representation of the utility model concrete anchor fixed end;
Fig. 6 is the structural representation of the utility model collapsible form.
Each Reference numeral is: 1-end screw, 2-tension-compression sensor, 3-jack, 4-oppositely support, 5-lock screw, 6-left support abutment, 7-spiral tension bar, 8-directional bearing, 9-concrete anchor fixed end, 10-collapsible form, 11-thread switch, 12-pinboard, 13-right support abutment, 14-spring, 15-backing plate, a-screw hole baffle plate, b/c/d-lead screw, e-transverse baffle, f-vertical gusseted plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
With reference to shown in Fig. 1, the utility model discloses a kind of expansive concrete tensile creep test device, comprise pinboard 12 and be arranged on two collapsible forms 10 on pinboard 12 by thread switch 11, the two ends of collapsible form 10 have snapped in concrete anchor fixed end 9, concrete anchor fixed end 9 is threaded connection directional bearing 8, directional bearing 8 is made up of bearing pull bar and inner circular spheroid, directional bearing 8 is connected with spiral tension bar 7 by internal thread, the spiral tension bar 7 being positioned at left side is connected with jack 3 and tension-compression sensor 2 in turn through after left support abutment 6, tension-compression sensor 2 is locked by end screw 1, the spiral tension bar 7 being positioned at right side is connected with spring 14 and billet 15 in turn through after right support abutment 13, pinboard 12 and left support abutment 6, right support abutment 13 is connected by bottom screw, spiral tension bar 7 is connected with backing plate 15 screw thread, spring 14 is contacted with right support abutment 13 by packing ring through one end after spiral tension bar 7, the other end contacts with backing plate 15, left support abutment 6 is connected with reverse support 4, reverse support 4 to be positioned on the left of pinboard 12 and to contact with left support abutment 6, spiral tension bar 7 is provided with the lock screw 5 being positioned at reverse support 4.
As shown in Figure 2, pinboard 12 is the hot rolling U-shaped steel sheet of the uniform screwed hole in the left and right sides.
As shown in Figure 3, Figure 4, left support abutment 6 and right support abutment 13 are welded to form by bottom plate, transverse baffle e and vertical gusseted plate f, and described bottom plate is provided with screw hole.
As shown in Figure 5, concrete anchor fixed end 9 is made up of screw hole baffle plate a and many lead screw being screwed in length and thickness on screw hole baffle plate a different, and lead screw b, lead screw c and lead screw d are all connected with screw hole baffle plate a by the screw of both sides.
As shown in Figure 6, collapsible form 10 is made up of dumbbell shape steel plate and the thread switch 11 that is connected with its screw thread.
When using the utility model, cast-in-place concrete is directly poured in the template that is made up of two collapsible forms 10 and two concrete anchor fixed ends 9, and vibration compacting, after concrete curing to certain length of time, turning thread switch 11 makes the collapsible form 10 of upper and lower both sides depart from pinboard 12 and be separated with concrete, by jack 3 extension spring 14, and pin lock screw 5, spring 14 is made to be in extended state, thus apply constant force to concrete sample, detect the concrete creep distortion of test automatically under this constant force effect by left end tension-compression sensor 2.
This testing arrangement mainly adopts horizontal spring to apply pulling force, its value of thrust is once lock and can ensure constant, test specimen is made to keep axial tension by directional bearing 8, cast-in-place concrete can directly establish mould inside shaping at this device by certainly simultaneously, ensure that the later stage installs the data fluctuations brought, Analysis of Concrete Tensile end adopts inner pre-buried anchoring piece to stretch, decrease due to the data deviation caused of locally creeping, automatically the Creep Characteristics of test specimen under secondary pulling force effect can be gathered by tension-compression sensor, stable testing, easy to operate, efficient.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only; and the embodiment that part is used; for the person of ordinary skill of the art; under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (8)
1. an expansive concrete tensile creep test device, it is characterized in that: comprise pinboard (12) and be arranged on two collapsible forms (10) on pinboard (12), the two ends of collapsible form (10) are fixed with concrete anchor fixed end (9), concrete anchor fixed end (9) is connected with directional bearing (8), directional bearing (8) is connected with spiral tension bar (7), be positioned at the spiral tension bar (7) in left side through being connected with jack (3) and tension-compression sensor (2) after left support abutment (6) in turn, be positioned at the spiral tension bar (7) on right side through being connected with spring (14) and backing plate (15) after right support abutment (13) in turn, left support abutment (6) is connected with reverse support (4), spiral tension bar (7) is provided with the lock screw (5) being positioned at reverse support (4).
2. a kind of expansive concrete tensile creep test device according to claim 1, is characterized in that, described collapsible form (10) is arranged on pinboard (12) by thread switch (11).
3. a kind of expansive concrete tensile creep test device according to claim 1, is characterized in that, described pinboard (12) is connected by bottom screw with left support abutment (6), right support abutment (13).
4. a kind of expansive concrete tensile creep test device according to claim 1, is characterized in that, described spring (14) is contacted with right support abutment (13) by packing ring one end afterwards through spiral tension bar (7), and the other end contacts with backing plate (15).
5. a kind of expansive concrete tensile creep test device according to Claims 1-4 any one, is characterized in that, the hot rolling U-shaped steel sheet that described pinboard (12) is the uniform screwed hole in the left and right sides.
6. a kind of expansive concrete tensile creep test device according to claim 5, it is characterized in that, described left support abutment (6) and right support abutment (13) are welded to form by bottom plate, transverse baffle (e) and vertical gusseted plate (f), and described bottom plate is provided with screw hole.
7. a kind of expansive concrete tensile creep test device according to claim 6, it is characterized in that, described concrete anchor fixed end (9) is by screw hole baffle plate (a) and be screwed in the upper length of screw hole baffle plate (a) and the different many lead screw of thickness form.
8. a kind of expansive concrete tensile creep test device according to claim 7, is characterized in that, described directional bearing (8) is made up of bearing pull bar and inner circular spheroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714988.3U CN204302118U (en) | 2014-11-25 | 2014-11-25 | A kind of expansive concrete tensile creep test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714988.3U CN204302118U (en) | 2014-11-25 | 2014-11-25 | A kind of expansive concrete tensile creep test device |
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| Publication Number | Publication Date |
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| CN204302118U true CN204302118U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420714988.3U Active CN204302118U (en) | 2014-11-25 | 2014-11-25 | A kind of expansive concrete tensile creep test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204302118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737784A (en) * | 2016-02-19 | 2016-07-06 | 中国水利水电科学研究院 | Testing machine displacement deformation measurement device |
| CN114486500A (en) * | 2022-02-25 | 2022-05-13 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
-
2014
- 2014-11-25 CN CN201420714988.3U patent/CN204302118U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737784A (en) * | 2016-02-19 | 2016-07-06 | 中国水利水电科学研究院 | Testing machine displacement deformation measurement device |
| CN105737784B (en) * | 2016-02-19 | 2018-06-29 | 中国水利水电科学研究院 | Displacement of testing machine deformation measuring device |
| CN114486500A (en) * | 2022-02-25 | 2022-05-13 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
| CN114486500B (en) * | 2022-02-25 | 2023-11-10 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |