CN101881673A - Test method and test device of confining pressure in steel tube concrete - Google Patents
Test method and test device of confining pressure in steel tube concrete Download PDFInfo
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- CN101881673A CN101881673A CN2009100620037A CN200910062003A CN101881673A CN 101881673 A CN101881673 A CN 101881673A CN 2009100620037 A CN2009100620037 A CN 2009100620037A CN 200910062003 A CN200910062003 A CN 200910062003A CN 101881673 A CN101881673 A CN 101881673A
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Abstract
The invention relates to a test method and a test device of confining pressure in steel tube concrete. The test method of the confining pressure of a steel tube to core concrete is characterized in that a miniature waterproof pressure gauge is fixedly arranged on the inner wall of the steel tube, and the core concrete transversely deforms under a loading action and generates corresponding deformation strain through a pressure slice arranged on the miniature waterproof pressure gauge to directly obtain the confining pressure thereof. The test device thereof comprises an outer circle steel ring, the pressure slice, a resistance strain gauge, a data line, a waterproof sealing layer and a data collection system, wherein the pressure slice, the back of which carries the resistance stain gauge, is arranged at one side of a groove of the outer circle steel ring, wrapped completely for waterproofing and sealing and connected to the data collection system through the data line. A test result thereof is intuitive and accurate, and the test device has the advantages of simpleness, convenience and low cost.
Description
Technical field
The present invention relates in a kind of concrete filled steel tube steel pipe to the method for testing and the proving installation of core concrete confining pressure.
Background technology
When research concrete filled steel tube carrying mechanical property, steel pipe is an important parameters to the confining pressure of core concrete, and its test is a difficult problem in the structural test, all is not well solved all the time.The researcher once adopted the measurement of test method of hydraulic pressure analogy to cross the confining pressure of steel pipe to core concrete, yet the hydraulic pressure analogy method is a kind of indirect class ratio method, test more loaded down with trivial details, reading inadequately intuitively, the result is inaccurate.Therefore, need convenient, the visual and accurate confining pressure measuring method of reading of a kind of measurement.Adopt small-sized waterproofing pressure meter to carry out the measurement of confining pressure, still do not have report at present.
Summary of the invention
The object of the present invention is to provide in the test of a kind of concrete filled steel tube steel pipe to the method for testing and the proving installation of core concrete confining pressure, make it have intuitive measurement results, accurately, the characteristics that proving installation is simple, convenient, cost is low.
Technical solution of the present invention is: a kind of steel pipe is to the method for testing of core concrete confining pressure, it is characterized in that before core concrete is built, small-sized waterproofing pressure meter being fixedly arranged in the steel pipe inwall, when concrete filled steel tube was subjected to load action, the deformation strain by small-sized waterproofing pressure meter upward pressure thin slice can directly obtain its confining pressure.
Small-sized waterproofing pressure meter can obtain the deformation strain parameter of pressure thin slice continuously by resistance strain gage and data acquisition system (DAS), obtains confining pressure by demarcating the test block nominal pressure.
A kind of proving installation of realizing said method is characterized in that being made up of small-sized waterproofing pressure meter and data acquisition system (DAS).Its middle-size and small-size waterproofing pressure meter is made up of outer ring steel loop, pressure thin slice, resistance strain gage, data line, waterproof sealing layer.The pressure thin slice places outer ring steel loop groove one side, sticks resistance strain gage at the pressure thin slice back side, and is connected with data line, wraps waterproof sealing then entirely.Before the concrete spouting, use the fixing small-sized waterproofing pressure meter of strong adhesive at the steel pipe inwall, when concrete filled steel tube in load action following time, the transversely deforming meeting of core concrete causes that the pressure thin slice is out of shape accordingly, its deformation strain is by the data acquisition system (DAS) collection, and applying pressure demarcates and to be converted to corresponding force value, is the confining pressure of steel pipe to core concrete.Also just a kind of measurement is convenient, the visual and accurate method for measurement of reading for the measurement of concrete filled steel tube confining pressure provides.
The invention provides in a kind of concrete filled steel tube steel pipe to the method for testing and the proving installation of core concrete confining pressure.The present invention adopts small-sized waterproofing pressure meter to carry out the test of confining pressure, intuitive measurement results, accurately, and proving installation is simple, easy-to-use, for the test of concrete filled steel tube confining pressure provides a kind of new method.The present invention is widely used in the concrete filled steel tube Mechanical Properties, also can be applicable to aspects such as the test of under the lateral confinement constraint condition soil body or expansion of solids material confining pressure and research.
Description of drawings
The mechanical schematic diagram of Fig. 1, proving installation of the present invention.
Fig. 2, embodiment (small-sized waterproofing pressure meter) photo figure.
Among Fig. 1: the 1-data acquisition system (DAS); 2-outer ring steel loop; 3-pressure thin slice; The 4-resistance strain gage; The 5-data line; The 6-waterproof sealing layer.
Embodiment
The method of testing of confining pressure in a kind of concrete filled steel tube test, before concrete spouting, use the small-sized waterproofing pressure meter of adhesive at the steel pipe inwall, concrete perfusion then, when concrete filled steel tube under load action, the transversely deforming meeting of core concrete causes that the pressure thin slice is out of shape accordingly, its deformation strain is by the data acquisition system (DAS) collection, and applying pressure demarcates and to be converted to corresponding force value, is the confining pressure of steel pipe to core concrete.
A kind of proving installation of realizing said method, it is made up of small-sized waterproofing pressure meter and data acquisition system (DAS) 1.Wherein, data acquisition system (DAS) 1 can adopt the general strain acquisition system of structural test.
Embodiment to the small-sized waterproofing pressure meter of the present invention elaborates below: present embodiment is being to implement under the prerequisite with the technical solution of the present invention; provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Small-sized waterproofing pressure meter is made up of outer ring steel loop 2, pressure thin slice 3, resistance strain gage 4, data line 5, waterproof sealing layer 6.Outer ring steel loop 2 is processed by steel, and its external diameter is 35mm, and internal diameter is 15mm, and thickness is 5mm, and the diameter of its upper groove is 28mm, and the degree of depth is 2mm.Pressure thin slice 3 is processed by copper sheet, and external diameter is 20mm, and thickness is 2mm.
Pressure thin slice 3 places outer ring steel loop 2 grooves one side, sticks resistance strain gage 4 at pressure thin slice 3 back sides, and connects data line 5, adopts silica gel to wrap water-tight entirely then.
Claims (4)
1. the method for testing of confining pressure in the concrete filled steel tube, it is characterized in that small-sized waterproofing pressure meter is fixedly arranged in the steel pipe inwall, core concrete produces transversely deforming under load action, can directly obtain its confining pressure by the corresponding deformation strain of small-sized waterproofing pressure meter upward pressure thin slice.
2. the method for testing of confining pressure in a kind of concrete filled steel tube according to claim 1, it is characterized in that small-sized waterproofing pressure meter can obtain the deformation strain parameter of pressure thin slice continuously by resistance strain gage and data acquisition system (DAS), obtain confining pressure by demarcating the test block nominal pressure.
3. the proving installation of confining pressure in the concrete filled steel tube is characterized in that being made up of small-sized waterproofing pressure meter and data acquisition system (DAS).
4. small-sized waterproofing pressure meter according to claim 3 is characterized in that being made up of outer ring steel loop, pressure thin slice, resistance strain gage, data line, waterproof sealing layer.The pressure thin slice places outer ring steel loop groove one side, and resistance strain gage is posted at its back side, is connected with data line, wraps waterproof sealing entirely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100620037A CN101881673A (en) | 2009-05-05 | 2009-05-05 | Test method and test device of confining pressure in steel tube concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100620037A CN101881673A (en) | 2009-05-05 | 2009-05-05 | Test method and test device of confining pressure in steel tube concrete |
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| Publication Number | Publication Date |
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| CN101881673A true CN101881673A (en) | 2010-11-10 |
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| CN2009100620037A Pending CN101881673A (en) | 2009-05-05 | 2009-05-05 | Test method and test device of confining pressure in steel tube concrete |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879135A (en) * | 2012-09-27 | 2013-01-16 | 宁波大学 | Measuring method for friction distribution of inner wall of confining device |
| CN103712655A (en) * | 2014-01-08 | 2014-04-09 | 成军 | Data monitoring method in construction process of high-dropping vibration-free self-compacting concrete-filled steel tube |
| CN106840253A (en) * | 2016-12-07 | 2017-06-13 | 山东大学 | A kind of confined concrete bow member steel reinforced concrete coupled characteristic evaluation method |
| CN107843187A (en) * | 2017-12-18 | 2018-03-27 | 武汉理工大学 | Adaptive transversely deforming measurement apparatus and measuring method |
| 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 |
| CN110455867A (en) * | 2019-07-16 | 2019-11-15 | 黑龙江八一农垦大学 | Concrete-filled steel square tubular column core concrete confining region boundary identification device and method |
-
2009
- 2009-05-05 CN CN2009100620037A patent/CN101881673A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879135A (en) * | 2012-09-27 | 2013-01-16 | 宁波大学 | Measuring method for friction distribution of inner wall of confining device |
| CN103712655A (en) * | 2014-01-08 | 2014-04-09 | 成军 | Data monitoring method in construction process of high-dropping vibration-free self-compacting concrete-filled steel tube |
| CN106840253A (en) * | 2016-12-07 | 2017-06-13 | 山东大学 | A kind of confined concrete bow member steel reinforced concrete coupled characteristic evaluation method |
| CN107843187A (en) * | 2017-12-18 | 2018-03-27 | 武汉理工大学 | Adaptive transversely deforming measurement apparatus and measuring method |
| CN107843187B (en) * | 2017-12-18 | 2023-05-26 | 武汉理工大学 | Self-adaptive transverse deformation measuring device and measuring method |
| 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 |
| CN110455867A (en) * | 2019-07-16 | 2019-11-15 | 黑龙江八一农垦大学 | Concrete-filled steel square tubular column core concrete confining region boundary identification device and method |
| CN110455867B (en) * | 2019-07-16 | 2022-02-15 | 黑龙江八一农垦大学 | Boundary recognition device and method for core concrete confinement area of square steel tube concrete column |
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Application publication date: 20101110 |