CN1231756C - Measuring device for concrete shrinkage and stress - Google Patents
Measuring device for concrete shrinkage and stress Download PDFInfo
- Publication number
- CN1231756C CN1231756C CN 200410001788 CN200410001788A CN1231756C CN 1231756 C CN1231756 C CN 1231756C CN 200410001788 CN200410001788 CN 200410001788 CN 200410001788 A CN200410001788 A CN 200410001788A CN 1231756 C CN1231756 C CN 1231756C
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- mould
- concrete
- steel plate
- rectangular frame
- stress
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Abstract
The present invention relates to a measuring device for automatically and continuously measuring concrete contraction and stress. Two concrete moulds are arranged on one testing platform, one mould is used for measuring stress, and the other mould is used for measuring contraction. One end of the mould for measuring concrete stress is fastened to a frame, the other end of the mould is connected with the frame by a screw rod and a nut, the other end of the screw rod is provided with a quartz force transducer, and a signal output from the quartz force transducer is accessed to a meter or a microcomputer. Both ends of the mould for measuring concrete contraction are provided with center holes, small steel poles previously embedded in concrete are inserted in the center holes, the frame connected with both ends of the mould is provided with a vortex transducer which is on the same axial line with the small steel poles and keeps a certain gap, the gap between the vortex transducer and the small steel poles can change when concrete contacts so that the contraction of the concrete is measured, and the output signal of the vortex sensor is accessed to the meter or the microcomputer. The device can simultaneously, automatically and continuously measure the contraction and the stress of concrete in the moulds, and the device has high measuring accuracy.
Description
Technical field:
The present invention relates to the measurement mechanism of a kind of concrete shrinkage and stress, particularly be applicable to the measurement mechanism of concrete shrinkage and internal stress.
Background technology:
The stress of concrete shrinkage deformation and generation is that very important parameters, the especially measurement of high performance concrete early-age shrinkage reach owing to the accurate mensuration of shrinking the internal stress that produces, and is significant with construction to The Concrete Structure Design.At present, the domestic measurement mechanism that does not also have to detect automatically simultaneously concrete shrinkage and internal stress.
Summary of the invention:
The present invention provides the measurement mechanism of a kind of automatic detection concrete shrinkage and stress in order to separate the problem that must not detect concrete shrinkage and internal stress simultaneously automatically.It is as follows to solve concrete technical scheme of the present invention:
The present invention is welded into first rectangular frame (12) by channel-section steel, second rectangular frame (19), first rectangular frame (12), following the 3rd steel plate (13) that is welded with respectively of second rectangular frame (19), the 5th steel plate (20), be placed with first mould (11) that is used to measure concrete stress in first rectangular frame (12), first mould (11) is a rectangular slot, its two ends section is than broad in the middle, be trapezoidal, one end both sides have groove (10), one end of first mould (11) and second closure plate (15) are fastening with screw and first rectangular frame (12), be welded with first steel plate (4) and second steel plate (8) on first closure plate (9) of the other end of first mould (11), respectively have a square hole on first steel plate (4) and second steel plate (8), one end of screw rod (1) is a rectangular parallelepiped bloom (3), have slot (5) in the rectangular parallelepiped bloom (3), four rib steel columns (6) penetrate the square hole of first steel plate (4) and second steel plate (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, the hole that screw rod (1) passes first rectangular frame (12) is screwed into nut (2), the rectangular parallelepiped bloom (3) that screw rod (1) is connected is connected with the other end of first mould (1 1), detected concrete (14) is packed in first mould (11), the output signal end of quartz force transducer (7) is connected to instrument, be placed with second mould (21) that is used to measure concrete shrinkage in second rectangular frame (19), second mould (21) is a rectangular slot, the closure plate center at second mould (21) two ends is porose, be inserted with the first little steel column (18) that is embedded in the concrete in this hole, the second little steel column (23), on second rectangular frame of locating near the two ends of second mould (21) (19), be welded with the 4th steel plate (17) and the 6th steel plate (24), on the 4th steel plate (17) and the 6th steel plate (24), first eddy current sensor (16) is housed respectively, second eddy current sensor (25), the output signal end of first eddy current sensor (16) and second eddy current sensor (25) is connected to instrument.The invention has the beneficial effects as follows while continuous automatic inspection concrete shrinkage and internal stress on a test platform, and calculate the elastic modulus of detected concrete, it is little to adopt quartz force transducer (7) to have a volume, measurement range is big, the precision height, the elastic deformation of sensor own is little, and is simple in structure, easily the advantage of making.
Description of drawings:
Fig. 1 is the vertical view of this device, and Fig. 2 is the A-A sectional view among Fig. 1, and Fig. 3 is the B-B sectional view among Fig. 1, and Fig. 4 is the C-C sectional view among Fig. 1, and Fig. 5 is the D-D sectional view among Fig. 1, Fig. 6 be among Fig. 1 E to partial view.
1 is screw rod among the figure, 2. is nuts, the 3rd, and the rectangular parallelepiped bloom, 4 is first steel plates, the 5th, and slot, 6 is four rib steel columns, the 7th, quartz force transducer 8. is second steel plates, and 9 is first closure plates, the 10th, groove, 11 is first moulds, 12 is first rectangular frames, 13 is the 3rd steel plates, the 14th, and concrete, 15 is second closure plates, 16 is first eddy current sensors, 17 is the 4th steel plates, and 18 is first little steel columns, and 19 is second rectangular frames, 20 is the 5th steel plates, 21 is second moulds, the 22nd, and concrete, 23 is second little steel columns, 24 is the 6th steel plates, and 25 is second eddy current sensors.
Embodiment:
Embodiment one: present embodiment is welded into first rectangular frame (12) and second rectangular frame (19) by channel-section steel, following the 3rd steel plate (13) and the 5th steel plate (20) of being welded with respectively of first rectangular frame (12) and second rectangular frame (19), be placed with first mould (11) that is used to measure concrete stress in first rectangular frame (12), first mould (11) is a rectangular slot, its two ends section is than broad in the middle, be trapezoidal, one end both sides have groove (10), one end of first mould (11) and second closure plate (15) are fastening with screw and first rectangular frame (12), be welded with first steel plate (4) and second steel plate (8) on first closure plate (9) of first mould (11) other end, first steel plate (4) and second steel plate (8) respectively have a square hole, one end of screw rod (1) is a rectangular parallelepiped bloom (3), have slot (5) in the rectangular parallelepiped bloom (3), four rib steel columns (6) penetrate the square hole of first steel plate (4) and second steel plate (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, the hole that screw rod (1) passes first rectangular frame (12) is screwed into nut (2), the rectangular parallelepiped bloom (3) that screw rod (1) is connected is connected with the other end of first mould (11), quartz force transducer (7) pressurized produced stress when detected concrete (14) was shunk, the output signal end of quartz force transducer (7) is connected to instrument, get final product the tension of continuous automatic inspection concrete (14) contraction process, be placed with second mould (21) that is used to measure concrete shrinkage in second rectangular frame (19), second mould (21) is a rectangular slot, closure plate center, second mould (21) two ends is porose, be inserted with the first little steel column (18) and the second little steel column (23) that are embedded in the concrete in this hole, on second rectangular frame (19), be welded with the 4th steel plate (17) and the 6th steel plate (24) near place, mould (21) two ends, first eddy current sensor (16) and second eddy current sensor (25) are housed respectively on the 4th steel plate (17) and the 6th steel plate (24), mould inner concrete (22) shrinks, increased the distance of first eddy current sensor (16) and second eddy current sensor (25) end face and first eddy current sensor (16) and second eddy current sensor (25) end face, the output signal end of first eddy current sensor (16) and second eddy current sensor (25) is connected to instrument, but the amount of contraction of continuous automatic inspection concrete (22).
Claims (1)
1, the measurement mechanism of a kind of concrete shrinkage and stress, it is characterized in that first rectangular frame (12) that is welded into by channel-section steel, second rectangular frame (19), first rectangular frame (12), following the 3rd steel plate (13) that is welded with respectively of second rectangular frame (19), the 5th steel plate (20), be placed with first mould (11) that is used to measure concrete stress in first rectangular frame (12), first mould (11) is a rectangular slot, its two ends section is than broad in the middle, be trapezoidal, one end both sides have groove (10), one end of first mould (11) and second closure plate (15) are fastening with screw and first rectangular frame (12), be welded with first steel plate (4) on the other end of first mould (11) and first closure plate (9), second steel plate (8), first steel plate (4), respectively have a square hole on second steel plate (8), one end of screw rod (1) is a rectangular parallelepiped bloom (3), be provided with slot (5) in the rectangular parallelepiped bloom (3), four rib steel columns (6) penetrate first steel plate (4), the slot (5) of the square hole of second steel plate (8) and screw rod (1) one end, quartz force transducer (7) be contained in the slot (5) and four rib steel columns (6) between, the hole that screw rod (1) passes first rectangular frame (12) is screwed into nut (2), the rectangular parallelepiped bloom (3) that screw rod (1) is connected is connected with the other end of first mould (11), detected concrete (14) first mould (11) of packing into, the output signal end of quartz force transducer (7) is connected to instrument, be placed with second mould (21) that is used to measure concrete shrinkage in second rectangular frame (19), second mould (21) is a rectangular slot, closure plate center, second mould (21) two ends is porose, be inserted with the first little steel column (18) that is embedded in the concrete in this hole, the second little steel column (23), on second rectangular frame of locating near the two ends of second mould (21) (19), be welded with the 4th steel plate (17), the 6th steel plate (24), in the 4th steel plate (17), first eddy current sensor (16) and second eddy current sensor (25) are housed respectively on the 6th steel plate (24), and the output signal end of first eddy current sensor (16) and second eddy current sensor (25) is connected to 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 CN1558234A (en) | 2004-12-29 |
| CN1231756C true CN1231756C (en) | 2005-12-14 |
Family
ID=34350652
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) |
Families Citing this family (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 |
| CN102590485B (en) * | 2012-02-29 | 2014-11-05 | 哈尔滨工业大学 | Framework-type concrete self-constriction measurement device |
| 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 |
| CN104280290B (en) * | 2014-09-26 | 2017-04-05 | 同济大学 | A kind of device and its using method of test plastic concrete/mortar ess-strain |
| 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 |
| CN110004823B (en) * | 2019-04-08 | 2020-10-13 | 上海市市政规划设计研究院有限公司 | Method for paving and maintaining ultrahigh-performance concrete steel bridge deck |
-
2004
- 2004-02-05 CN CN 200410001788 patent/CN1231756C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1558234A (en) | 2004-12-29 |
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