CN208187851U - A kind of device for realizing steel tube confined concrete test specimen axis pressure - Google Patents
A kind of device for realizing steel tube confined concrete test specimen axis pressure Download PDFInfo
- Publication number
- CN208187851U CN208187851U CN201820666039.0U CN201820666039U CN208187851U CN 208187851 U CN208187851 U CN 208187851U CN 201820666039 U CN201820666039 U CN 201820666039U CN 208187851 U CN208187851 U CN 208187851U
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- steel pipe
- loading head
- test specimen
- concrete
- core concrete
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Abstract
The utility model relates to a kind of devices for realizing steel tube confined concrete test specimen axis pressure, including steel pipe and the core concrete for being poured in a steel pipe portion, the groove for being not filled by core concrete is reserved at the both ends of steel pipe, loading head is provided in the groove at steel pipe both ends, loading head one end insertion groove is contacted with core concrete end face, loading head other end setting load cap, is provided with the unidirectional foil gauge of dry plate if being circumferentially equally spaced around on the side of loading head.The numerical value that the utility model can be generated directly by observation comparison foil gauge, it carries out judging whether concrete is in axial compressive force state more accurately, and the corresponding position of test specimen is effectively and accurately adjusted according to strain value, ensure that core concrete is in the accuracy and reliability that experimental data is improved by axial compressive force state during loading.
Description
Technical field
The utility model relates to a kind of devices for realizing steel tube confined concrete test specimen axis pressure.
Background technique
Concrete filled steel tube has the characteristics that bearing capacity is high, ductility is good, anti-seismic performance is good, in field of civil engineering application
Increasingly extensively.Concrete filled steel tube stress is divided into two kinds, and one is core concretes to be pressurized, steel pipe had not only longitudinally been pressurized but also lateral
Tension, another kind are core concrete compression, steel pipe only lateral tension.Compared to the concrete filled steel tube of the first structure type, after
A form of steel tube confined concrete structure stress is more reasonable, can more play two kinds of material advantages, bearing capacity it is higher and by
To concern.Steel tube confinement core concrete column axial compression test is also gradually carried out in the lab, which formally loads in test specimen
Before to carry out geometry to neutralizing physics centering, existing physics centering method, be test specimen steel pipe outer surface carry out it is symmetrical
Ground pastes foil gauge, and the difference of clearance observation sustained height strain sheet data carries out judging test specimen section stress, then accordingly
The shortcomings that ground adjusts test specimen placement location, and core concrete is made to bear axial evenly load, the test is steel tube confinement core
Concrete axial compression test loads initial stage, and although steel pipe and concrete interface have bond stress, even if but concrete is held at this time
Very big by load, the vertical load for passing to steel pipe by interface is small, and the transverse direction of generation and vertical deformation are small, the steel pipe of sustained height
Vertical strain sheet data is smaller, cannot determine whether that steel pipe is in axis pressure condition.And when the numerical value that vertical foil gauge is surveyed is larger
When, corresponding applied load can be very big, and whether inner concrete has crack developing, can not also observe, to test specimen
Formally being loaded with can not also judge without influence, and steel pipe and concrete contact interface degree of roughness are different, and it is same to pass to steel pipe
The vertical load of height measuring point is not of uniform size, causes steel pipe vertical deformation variant.Therefore existing steel pipe core constrains coagulation
The test specimen physics centering method of earth pillar axial compression test can not observe the stress and deformation of internal core concrete load-bearing process,
The result for adjusting centering is unreliable, gained test data result and actually has relatively large deviation, and really reflection steel pipe core is about
Stress and collapse state of the beam concrete column during axis pressure.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of dresses for realizing steel tube confined concrete test specimen axis pressure
It sets, can carry out judging whether concrete is in by axial compressive force state more accurately, improve experimental result accuracy and can
By property.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is: including steel pipe and being poured in a steel pipe portion
Core concrete, the groove for being not filled by core concrete is reserved at the both ends of steel pipe, is arranged in the groove at steel pipe both ends
There is loading head, loading head one end insertion groove is contacted with core concrete end face, and loading head other end setting load cap is loading
If being circumferentially equally spaced around on the side of head and being provided with the unidirectional foil gauge of dry plate.
Further, the unidirectional foil gauge is attached to the position that loading head stretches out groove.
Further, loading head sectional dimension is identical as core concrete sectional dimension, foil gauge measurement direction and load
Head profile height direction is consistent.
Compared with prior art, the utility model has the beneficial effects that
(1) numerical value for the foil gauge that the utility model can be directly arranged symmetrically by observation, it is more accurate reliable
Ground carries out judging whether core confined concrete is in axis pressure stress, and effectively and accurately adjusts test specimen according to strain value
Corresponding position, it is ensured that core concrete is in the stress of axis pressure during loading, improves the accuracy of experimental data
And reliability；
(2) the utility model is suitable for steel pipe core confined concrete axis of a cylinder pressure and bias test, especially in stub shaft
In pressure test, physics centering adjusted result reliability with higher；
(3) the utility model reduces the dosage of steel, and can simplify test specimen since steel tube end part is without welding short slab
Processing program advantageously reduces testing expenses.
For the purpose of this utility model, technical solution and advantage is more clearly understood, specific embodiment will be passed through below
And relevant drawings, the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the organigram of the utility model；
Fig. 2 is the steel pipe and concrete sample organigram main view of the utility model；
Fig. 3 is the organigram main view of the utility model loading mechanism；
Fig. 4 is the organigram top view of the utility model loading mechanism.
In figure: 1- steel pipe；2- core concrete；3- loading head；The unidirectional foil gauge of 4-；5- loads cap；6- groove.
Specific embodiment
It is practical to this with reference to the accompanying drawing to can be more clearly understood the above objects, features and advantages of the present invention
Novel specific embodiment elaborates.
As shown in Fig. 1 ~ 4, a kind of device for realizing steel tube confined concrete test specimen axis pressure, including including steel pipe 1 and pour
In the core concrete 2 of steel duct, the groove 6 for being not filled by core concrete 2 is reserved at the both ends of steel pipe 1, at 1 liang of steel pipe
Loading head 3 is provided in the groove 6 at end, 3 one end of loading head insertion groove 6 is contacted with 2 end face of core concrete, and loading head 3 is another
One end setting load cap 5, is provided with the unidirectional foil gauge 4 of dry plate if being circumferentially equally spaced around on the side of loading head.
In the present embodiment, the unidirectional foil gauge 4 is attached to the position that loading head 3 stretches out groove 6.
In the present embodiment, 3 sectional dimension of loading head is identical as 2 sectional dimension of concrete, 4 measurement direction of foil gauge and load
First 3 profile height direction is consistent.
The working method of the utility model is:
(1) one end of steel pipe 1 is clogged using the plug of certain depth, from the other end of steel pipe 1 to steel pipe 1 inside pour
Core concrete 2 stops pouring after 2 distance of core concrete pours end certain distance, and keeps steel pipe 1 is perpendicular to be erected progress
Maintenance；
(2) after having conserved a period of time, core concrete 2 solidifies completely, and the plug by plug in 1 one end of steel pipe is removed, this
Sample fills 1 interlude of steel pipe by core concrete 2, fluted 6 is reserved at the both ends of steel pipe 1, to the core coagulation in steel pipe 1
It polishes native 2 test specimen two ends end faces；
(3) after polishing, two 3 one end faces of loading head are welded with two load caps 5 respectively, and in each loading head
Equal spacer rings are attached to around several unidirectional foil gauges 4, unidirectional foil gauge 4 is sticked close to one end of load cap 5 on 3 side, and
One end that two loading heads 3 are not welded with load cap 5 is filled in respectively in the groove 6 at 1 both ends of steel pipe, and makes the end face of loading head 3
It is contacted with 2 end face of core concrete；
(4) load is applied to load cap 5, loading direction is attached to loading head 3 by observation perpendicular to the end face of load cap 5
If the dependent variable that the unidirectional foil gauge 4 of the dry plate of side generates, judges that 2 section of core concrete whether by axial well-distributed pressure, is
It is no to need to adjust steel pipe core concrete test specimen position.If the dependent variable that unidirectional foil gauge 4 generates is unequal, and each unidirectionally answers
When becoming the numerical value for the dependent variable difference that piece 4 generates more than certain value, illustrate answering for the different directions stress generation of 3 side of loading head
Become different, by axial compressive force bias is occurred for further instruction loading head 3, and steel pipe core concrete test specimen is by non-axis at this time
It to pressure, should stop loading at this time, find axial compressive force and eccentric reason occurs, if the dependent variable that each unidirectional foil gauge 4 generates
Numerical value it is equal or difference numerical value it is minimum, then illustrate 3 side of loading head different directions stress generate strain facies it is same, further
Illustrate that loading head 3 is good by axial compressive force centering, at this time steel pipe core concrete test specimen by axial compressive force without carry out
Adjustment.
Aforesaid operations process and software and hardware configuration are not intended to limit this only as the preferred embodiment of the utility model
The scope of the patents of utility model, equivalents made by using the description of the utility model and the drawings, or directly or
It is used in correlative technology field indirectly, is also included in the patent protection scope of the utility model.
Claims (3)
1. a kind of device for realizing steel tube confined concrete test specimen axis pressure, including steel pipe and the core coagulation for being poured in a steel pipe portion
Soil is reserved with the groove for being not filled by core concrete at the both ends of steel pipe, is provided with loading head in the groove at steel pipe both ends, adds
Carrier head one end insertion groove is contacted with core concrete end face, loading head other end setting load cap, on the side of loading head
The unidirectional foil gauge of dry plate is provided with if being circumferentially equally spaced around.
2. the device according to claim 1 for realizing steel tube confined concrete test specimen axis pressure, it is characterised in that: described unidirectional
Foil gauge is attached to the position that loading head stretches out groove.
3. the device according to claim 1 for realizing steel tube confined concrete test specimen axis pressure, it is characterised in that: loading head is cut
Face size is identical as core concrete sectional dimension, and foil gauge measurement direction is consistent with loading head profile height direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820666039.0U CN208187851U (en) | 2018-05-07 | 2018-05-07 | A kind of device for realizing steel tube confined concrete test specimen axis pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820666039.0U CN208187851U (en) | 2018-05-07 | 2018-05-07 | A kind of device for realizing steel tube confined concrete test specimen axis pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208187851U true CN208187851U (en) | 2018-12-04 |
Family
ID=64432662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820666039.0U Expired - Fee Related CN208187851U (en) | 2018-05-07 | 2018-05-07 | A kind of device for realizing steel tube confined concrete test specimen axis pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208187851U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414357A (en) * | 2018-05-07 | 2018-08-17 | 福州大学 | A kind of device and its working method for realizing steel tube confined concrete test specimen axis pressure |
| CN110987247A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Test method for measuring uniform and non-uniform restraining force of concrete-filled steel tubular column by adopting piezoelectric film |
| CN111006798A (en) * | 2019-10-21 | 2020-04-14 | 武汉大学 | Test method for measuring active and passive hoop force of FRP (fiber reinforced Plastic) confined concrete column by adopting piezoelectric film |
| CN114894623A (en) * | 2022-05-26 | 2022-08-12 | 福州大学 | Steel pipe constrained UHPC column axial pressure bearing capacity test device and test method thereof |
-
2018
- 2018-05-07 CN CN201820666039.0U patent/CN208187851U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414357A (en) * | 2018-05-07 | 2018-08-17 | 福州大学 | A kind of device and its working method for realizing steel tube confined concrete test specimen axis pressure |
| CN108414357B (en) * | 2018-05-07 | 2024-01-16 | 福州大学 | Device for realizing axial compression of steel pipe confined concrete test piece and working method thereof |
| CN110987247A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Test method for measuring uniform and non-uniform restraining force of concrete-filled steel tubular column by adopting piezoelectric film |
| CN111006798A (en) * | 2019-10-21 | 2020-04-14 | 武汉大学 | Test method for measuring active and passive hoop force of FRP (fiber reinforced Plastic) confined concrete column by adopting piezoelectric film |
| CN114894623A (en) * | 2022-05-26 | 2022-08-12 | 福州大学 | Steel pipe constrained UHPC column axial pressure bearing capacity test device and test method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 |