CN1558234A - Measuring device for concrete shrinkage and stress - Google Patents
Measuring device for concrete shrinkage and stress Download PDFInfo
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- CN1558234A CN1558234A CNA2004100017884A CN200410001788A CN1558234A CN 1558234 A CN1558234 A CN 1558234A CN A2004100017884 A CNA2004100017884 A CN A2004100017884A CN 200410001788 A CN200410001788 A CN 200410001788A CN 1558234 A CN1558234 A CN 1558234A
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Abstract
The present invention is one kind of automatic continuous concrete contraction and stress measurer. On one test stage, there are two concrete molds, one for measuring stress and the other for measuring contraction. The mold for measuring concrete stress has one end fastened to the frame and the other end connected to the frame with screw and nut, and the other end of the screw has dynamometric quartz sensor connected with output signal fed to instrument or microcomputer. The mold for measuring concrete contraction has central hole in the two ends for the small steel column pre-buried inside concrete, one eddy current sensor is installed on the frame, and some interval is reserved between the small steel column and the sensor. When concrete contracts, the interval will change and the shrinkage of concrete may be measured and the signal the eddy current sensor outputs is fed to the instrument or microcomputer. The present invention has high measurement precision.
Description
Affiliated technical field
The present invention relates to a kind of concrete measurement mechanism, particularly a kind of measurement mechanism of measuring concrete shrinkage and stress that is applicable to.
Background technology
The stress of concrete shrinkage deformation and generation is important parameters very, especially the measurement of high performance concrete early-age shrinkage reaches owing to the accurate mensuration of shrinking the internal stress that produces, The Concrete Structure Design and construction there is important meaning, at present, the domestic device that does not also have to detect automatically simultaneously contraction and stress.
Summary of the invention
The measurement mechanism that the purpose of this invention is to provide a kind of automatic continuous coverage concrete shrinkage and stress.
Above-mentioned purpose is to be realized by following technical scheme: channel-section steel is welded into two rectangular frames 12 and 19, welding steel 13 and 20 below the framework, place the mould 11 of measuring concrete stress in the framework 12, mould 11 is rectangular slots, the two ends section is than broad in the middle, be trapezoidal, groove 10 is opened in one end both sides, one end closure plate, the 15 usefulness screws and the framework 12 of mould 11 are fastening, two steel plates 4 of other end closure plate 9 welding of mould 11 and 8, steel plate 4 and 8 respectively has a square hole, one end of screw rod 1 is a rectangular parallelepiped bloom 3, have slot 5, four rib steel columns 6 to penetrate the square hole of steel plate 4 and 8 and the slot 5 of screw rod 1 one ends in the bloom 3, quartz force transducer 7 is contained in the slot 5 and between the four rib steel columns 6.Screw rod 1 passes the hole of framework 12, is screwed into nut 2, connects the other end of mould 11, detected concrete 14 mould 11 of packing into, and the quartz force transducer output signal inserts instrument.Place in another framework 19 and measure concrete shrinkage mould 21, mould 21 is rectangular slots, closure plate center, mould 21 two ends is porose, insertion is embedded in the little steel column 18 of concrete and 23, at close both mold ends place, welding steel 17 and 24 on framework 19 is adorned an eddy current sensor 16 and 25 respectively on steel plate 17 and 24, the eddy current sensor output signal inserts instrument.
The invention has the beneficial effects as follows concrete contraction of continuous automatic measurement simultaneously and stress on a test platform, can calculate the elastic modulus of detected concrete.Adopt the quartz force transducer volume little, measurement range is big, and the elastic deformation of sensor own is little, and the present invention is simple in structure, makes easily.
Description of drawings
Introduce a kind of embodiment below in conjunction with accompanying drawing.
Fig. 1 is the vertical view of present embodiment.
Fig. 2 is an A-A sectional view among Fig. 1
Fig. 3 is a B-B sectional view among Fig. 1
Fig. 4 is a C-C sectional view among Fig. 1.
Fig. 5 is a D-D sectional view among Fig. 1.
Fig. 6 be among Fig. 1 E to partial view.
1. screw rods among the figure, 2. nut, 3. rectangular parallelepiped bloom, 4. steel plate, 5. the slot in the bloom, 6. four rib steel columns, 7. quartz force transducer, 8. steel plate, 9. closure plate is 10. opened groove, 11. moulds, 12. frameworks, 13. steel plate, 14. concrete, 15. closure plates, 16. eddy current sensors, 17. steel plate, 18. little steel columns, 19. frameworks, 20. steel plates, 21. moulds, 22. concrete, 23. little steel columns, 24. steel plates, 25. eddy current sensors
Embodiment
As shown in Figure 1, be welded into two rectangular frames (12) (19) with channel-section steel, welding steel below the framework (13) (20), in framework (12), place the mould (11) of measuring concrete stress, mould (11) is the rectangular slot that steel plate is made, the two ends section is than broad in the middle, be trapezoidal, groove (10) is opened in mould one end both sides, one end closure plate (15) of mould (11) is fastening with screw and framework (12), two steel plates (4) (8) of other end closure plate (9) welding of mould (11), steel plate (4) (8) has square opening, and an end of screw rod (1) is a rectangular parallelepiped bloom (3), and slot (5) is arranged in (3), four rib steel columns (6) penetrate the square hole of steel plate (4) (8) and the slot (5) of screw rod (1) one end, quartz force transducer (7) be contained in the slot (5) and four rib steel columns (6) between.Screw rod (1) passes the hole of framework (12), is screwed into nut (2), connects the other end of mould (11).Quartz force transducer (7) compression chord when concrete (14) shrinks, output signal inserts instrument, gets final product the tension of continuous automatic measurement concrete (14) contraction process.Place the mould (21) of measuring concrete shrinkage in the framework (19), mould (21) is a rectangular slot, (21) closure plate center in two ends is porose, insertion is embedded in the little steel column of concrete (22) (18) (23), locating near mould (21) two ends, welding steel (17) (24), on steel plate (17) (24), adorn an eddy current sensor (16) (25) respectively, mould inner concrete (22) shrinks, increased the distance between eddy current sensor end face and the little steel column end face, the eddy current sensor output signal inserts the amount of contraction that instrument gets final product continuous automatic measurement mould inner concrete (22).
Claims (1)
1. the present invention relates to the measurement mechanism of a kind of concrete shrinkage and stress, it is characterized in that: be welded into two rectangular frames 12 and 19 with channel-section steel, welding steel 13 and 20 below the framework, place the mould 11 of measuring concrete stress in the framework 12, mould 11 is rectangular slots, the two ends section is than broad in the middle, be trapezoidal, groove 10 is opened in one end both sides, one end closure plate, the 15 usefulness screws and the framework 12 of mould 11 are fastening, two steel plates 4 of other end closure plate 9 welding of mould 11 and 8, steel plate 4 and 8 respectively has a square hole, and an end of screw rod 1 is a rectangular parallelepiped bloom 3, and slot 5 is arranged in the bloom 3, four rib steel columns 6 penetrate the square hole of steel plate 4 and 8 and the slot 5 of screw rod 1 one ends, and quartz force transducer 7 is contained in the slot 5 and between the four rib steel columns 6.Screw rod 1 passes the hole of framework 12, is screwed into nut 2, connects the other end of mould 11, detected concrete 14 mould 11 of packing into, and the quartz force transducer output signal inserts instrument.
Place in another framework 19 and measure concrete shrinkage mould 21, mould 21 is rectangular slots, closure plate center, mould 21 two ends is porose, insertion is embedded in the little steel column 18 of concrete and 23, at close both mold ends place, welding steel 17 and 24 on framework 19 is adorned an eddy current sensor 16 and 25 respectively on steel plate 17 and 24, the eddy current sensor output signal inserts instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410001788 CN1231756C (en) | 2004-02-05 | 2004-02-05 | Measuring device for concrete shrinkage and stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410001788 CN1231756C (en) | 2004-02-05 | 2004-02-05 | Measuring device for concrete shrinkage and stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1558234A true CN1558234A (en) | 2004-12-29 |
| CN1231756C CN1231756C (en) | 2005-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410001788 Expired - Fee Related CN1231756C (en) | 2004-02-05 | 2004-02-05 | Measuring device for concrete shrinkage and stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1231756C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514063C (en) * | 2006-05-12 | 2009-07-15 | 郑万山 | Method for testing real stress of self-compensating concrete structure and concrete real stress gauge |
| CN102590485A (en) * | 2012-02-29 | 2012-07-18 | 哈尔滨工业大学 | Framework-type concrete self-constriction measurement device |
| CN102866245A (en) * | 2012-09-17 | 2013-01-09 | 中国建筑科学研究院 | Test method and test device for unrestraint measurement of concrete deformation performance |
| CN104280290A (en) * | 2014-09-26 | 2015-01-14 | 同济大学 | Device for testing stress-strain of plastic concrete/mortar and use method of device |
| CN106771097A (en) * | 2016-12-16 | 2017-05-31 | 中国建筑材料科学研究总院 | Concrete shrinkage and drying shrinkage pressure tester and test method |
| CN108761048A (en) * | 2018-05-30 | 2018-11-06 | 重庆大学 | A kind of complete set of equipments for detecting concrete shrinkage stress |
| CN110004823A (en) * | 2019-04-08 | 2019-07-12 | 上海市市政规划设计研究院有限公司 | Ultra-high performance concrete paving steel bridge deck maintenance process |
-
2004
- 2004-02-05 CN CN 200410001788 patent/CN1231756C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514063C (en) * | 2006-05-12 | 2009-07-15 | 郑万山 | Method for testing real stress of self-compensating concrete structure and concrete real stress gauge |
| CN102590485A (en) * | 2012-02-29 | 2012-07-18 | 哈尔滨工业大学 | Framework-type concrete self-constriction measurement device |
| CN102590485B (en) * | 2012-02-29 | 2014-11-05 | 哈尔滨工业大学 | Framework-type concrete self-constriction measurement device |
| CN102866245A (en) * | 2012-09-17 | 2013-01-09 | 中国建筑科学研究院 | Test method and test device for unrestraint measurement of concrete deformation performance |
| CN102866245B (en) * | 2012-09-17 | 2015-04-22 | 中国建筑科学研究院 | Test method and test device for unrestraint measurement of concrete deformation performance |
| CN104280290A (en) * | 2014-09-26 | 2015-01-14 | 同济大学 | Device for testing stress-strain of plastic concrete/mortar and use method of device |
| CN106771097A (en) * | 2016-12-16 | 2017-05-31 | 中国建筑材料科学研究总院 | Concrete shrinkage and drying shrinkage pressure tester and test method |
| CN108761048A (en) * | 2018-05-30 | 2018-11-06 | 重庆大学 | A kind of complete set of equipments for detecting concrete shrinkage stress |
| CN110004823A (en) * | 2019-04-08 | 2019-07-12 | 上海市市政规划设计研究院有限公司 | Ultra-high performance concrete paving steel bridge deck maintenance process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1231756C (en) | 2005-12-14 |
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