CN109520821B - Special bending and shearing test loading device and loading method for steel-concrete structure test piece - Google Patents
Special bending and shearing test loading device and loading method for steel-concrete structure test piece Download PDFInfo
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- CN109520821B CN109520821B CN201811533153.7A CN201811533153A CN109520821B CN 109520821 B CN109520821 B CN 109520821B CN 201811533153 A CN201811533153 A CN 201811533153A CN 109520821 B CN109520821 B CN 109520821B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Life Sciences & Earth Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a special bending and shearing test loading device and a loading method for a steel-concrete structure test piece, which are characterized in that: the base jack install in the bottom recess of loading frame, the base is installed on the top surface of base jack, steel-concrete structure test piece is installed on the top surface of base, steel-concrete structure test piece left end is equipped with the steel tip, be equipped with the spout on the loading frame roof bottom surface, loading jack, imaging jack and counter force jack from left to right install in proper order in the spout and all can follow the spout and control the removal, displacement caliber fixed mounting is on the bottom surface of loading jack, concrete fault ultrasonic imaging appearance is installed on the bottom surface of imaging jack. The invention adopts a plurality of jack devices to adjust the height, so that the whole device is suitable for bending and shearing test loading of test pieces with different specifications of steel-concrete structures, and simultaneously, the internal damage condition of the test pieces with the steel rod structures is monitored in real time through a concrete fault ultrasonic imager.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a special bending and shearing test loading device for a steel-concrete structure test piece and a loading method thereof.
Background
As one of the most commonly used structures in the field of civil engineering, people need to test various mechanical properties of the steel-concrete structure, but a loading device in a laboratory cannot adapt to bending and shearing test loading of test pieces with different specifications of steel-concrete structures, and the internal damage condition of the test pieces needs to be observed in real time in a special test process.
Based on the above problems, a special bending and shearing test loading device for a mixed structure test piece and a using method thereof are needed, the bending and shearing test loading is carried out on the steel-concrete structure test piece, and the damage condition of the inside of the test piece in the loading process is fed back in real time.
Disclosure of Invention
The invention aims to solve the technical problem of providing a special bending and shearing test loading device for a steel-concrete structure test piece and a loading method thereof, aiming at the defects of the prior art, wherein a plurality of jack devices are adopted for adjusting the heights, so that the whole device is suitable for bending and shearing test loading of the steel-concrete structure test piece with different specifications, and meanwhile, the internal damage condition of the steel-concrete structure test piece is monitored in real time through a concrete fault ultrasonic imager.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a special bending of steel reinforced concrete structure test piece, shear test loading device and loading method thereof which characterized in that: including loading frame, base jack, steel-concrete structure test piece, steel tip, spout, loading jack, displacement caliber, imaging jack, concrete fault ultrasonic imaging appearance and reaction jack, the base jack install in the bottom recess of loading frame, the base install on the top surface of base jack, steel-concrete structure test piece install on the top surface of base, steel-concrete structure test piece left end be equipped with the steel tip, loading frame roof bottom surface on be equipped with the spout, loading jack, imaging jack and reaction jack from left to right install in proper order in the spout and all can follow the spout and control and remove, displacement caliber fixed mounting on the bottom surface of loading jack, concrete fault ultrasonic imaging appearance install on the bottom surface of imaging jack.
The loading method comprises the following steps:
a) Unloading the oil pressure in the loading jack, the imaging jack and the counter jack to keep the working length to be the shortest;
b) The height of the base jack is adjusted to enable the base to be kept flush with the bottom of the loading frame, a steel-concrete structure test piece is placed on the base, and the direction of the steel end of the steel-concrete structure test piece is adjusted to be consistent with that of the loading jack;
c) The height of the base jack is adjusted, the base is lifted or lowered, the height difference between the steel end part and the loading jack is as small as possible, and the height difference between the upper surface of the steel-concrete structure test piece and the concrete fault ultrasonic imager is as small as possible;
d) The positions of the loading jack, the imaging jack and the counter-force jack in the chute are moved, and the specific positions of the loading jack above the steel end are regulated according to specific bending and shearing experiment requirements, so that the imaging jack is kept right above one side of the upper surface of the steel-concrete structure test piece close to the steel end, and the counter-force jack is kept right above the other end of the steel end of the upper surface of the steel-concrete structure test piece;
e) The working length of the counter-force jack is adjusted, so that the counter-force jack is pressed on the steel-concrete structure test piece and is stressed but not excessively stressed, and the steel-concrete structure test piece is prevented from turning over;
f) The working length of the imaging jack is adjusted, so that the concrete fault ultrasonic imaging instrument is pressed on the upper surface of the steel-concrete structure test piece, and the concrete fault ultrasonic imaging instrument is ensured to be contacted but not stressed;
g) The working length of a loading jack is regulated, bending and shearing test loading is carried out on the steel end part of the steel-concrete structure test piece, displacement measurer data and other deformation data are recorded in real time in the loading process, and the image change of the concrete fault ultrasonic imager is recorded in real time;
h) And after loading is finished, closing the concrete fault ultrasonic imaging instrument, unloading the oil pressure of the loading jack, the imaging jack and the counter jack, so that the loading jack, the imaging jack and the counter jack are kept in the shortest working state, taking a picture of the failure mode of the test piece, withdrawing the steel-concrete structural test piece, and ending the work.
The displacement measurer is fixed at the bottom of the loading jack and is not detachable.
The working length of the loading jack is longer than that of the counter jack.
The concrete fault ultrasonic imaging instrument is fixed at the lower side of the imaging jack and is used for monitoring the damage condition of the inside of the steel-concrete structure test piece in real time during loading; the base jack is made of a thick steel plate, and the height of the base can be adjusted by adjusting the base jack, so that the height of a steel-concrete structure test piece is adjusted, and the loading jack is convenient to load the test piece; the sliding groove is rough, so that the loading jack, the imaging jack and the counter-force jack are prevented from sliding in the loading process, and the loading process is prevented from being influenced.
The invention has the advantages that: the heights of the jack devices are adjusted, so that the whole device is suitable for bending and shearing test loading of test pieces with steel-concrete structures of different specifications; and meanwhile, the internal damage condition of the steel rod structure test piece is monitored in real time through a concrete fault ultrasonic imager.
Drawings
FIG. 1 is a structural isometric view of the present invention;
fig. 2 is a front view of the structure of the present invention.
Wherein the reference numerals are as follows: the device comprises a loading frame 1, a base 2, a base jack 3, a steel-concrete structure test piece 4, a steel end 5, a chute 6, a loading jack 7, a displacement measurer 8, an imaging jack 9, a concrete fault ultrasonic imager 10 and a counter-force jack 11.
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
the utility model provides a special bending of steel reinforced concrete structure test piece, shear test loading device and loading method thereof which characterized in that: including loading frame 1, base 2, base jack 3, steel-concrete structure test piece 4, steel tip 5, spout 6, loading jack 7, displacement caliber 8, imaging jack 9, concrete fault ultrasonic imaging appearance 10 and reaction jack 11, base jack 3 install in the bottom recess of loading frame 1, base 2 install on the top surface of base jack 3, steel-concrete structure test piece 4 install on the top surface of base 2, steel-concrete structure test piece 4 left end be equipped with steel tip 5, loading frame 1 roof bottom surface on be equipped with spout 6, loading jack 7, imaging jack 9 and reaction jack 11 from left to right in proper order install in spout 6 and all can follow spout 6 and control the removal, displacement caliber 8 fixed mounting on the bottom surface of loading jack 7, concrete fault ultrasonic imaging appearance 10 install on the bottom surface of imaging jack 9.
In an embodiment, the loading method includes the following steps:
a) Unloading the oil pressure in the loading jack 7, the imaging jack 9 and the counter jack 11 to keep the working length to be the shortest;
b) The height of the base jack 3 is adjusted, so that the base 2 is kept level with the bottom of the loading frame 1, a steel-concrete structure test piece 4 is placed on the base 2, and the direction of the steel end 5 of the steel-concrete structure test piece 4 is adjusted to be consistent with the direction of the loading jack 7;
c) The height of the base jack 3 is adjusted, the base 2 is lifted or lowered, the height difference between the steel end 5 and the loading jack 7 is as small as possible, and the height difference between the upper surface of the steel-concrete structure test piece 4 and the concrete fault ultrasonic imager 10 is as small as possible;
d) The positions of the loading jack 7, the imaging jack 9 and the counter-force jack 11 in the chute 6 are moved, and the specific bending and shearing experiment requires to adjust the specific position of the loading jack 7 above the steel end 5, so that the imaging jack 9 is kept right above one side of the upper surface of the steel-concrete structure test piece 4 close to the steel end 5, and the counter-force jack 11 is kept right above the other end of the steel end 5 on the upper surface of the steel-concrete structure test piece 4;
e) The working length of the counter-force jack 11 is adjusted, so that the counter-force jack 11 is pressed on the steel-concrete structure test piece 4 and is stressed but not excessively stressed, and the steel-concrete structure test piece 4 is prevented from turning on one's side;
f) The working length of the imaging jack 9 is adjusted, so that the concrete fault ultrasonic imaging instrument 10 is pressed on the upper surface of the steel-concrete structure test piece 4, and the concrete fault ultrasonic imaging instrument 10 is ensured to be contacted but not stressed;
g) The working length of the loading jack 7 is regulated, bending and shearing test loading is carried out on the steel end 5 of the steel-concrete structure test piece 4, data of the displacement measurer 8 and other deformation data are recorded in real time in the loading process, and image changes of the concrete fault ultrasonic imager 10 are recorded in real time;
h) After loading is finished, the concrete fault ultrasonic imaging instrument 10 is closed, the oil pressure of the loading jack 7, the imaging jack 9 and the counter jack 11 is unloaded, so that the loading jack, the imaging jack and the counter jack are kept in the shortest working degree state, a picture of the damage state of a test piece is taken, the steel-concrete structure test piece is removed, and the work is finished.
In an embodiment, the displacement measurer 8 is fixed at the bottom of the loading jack 7 and the displacement measurer 8 is not detachable. When in use, the displacement measurer 8 is directly loaded without being installed again.
In an embodiment, the working length of the loading jack 7 is greater than the working length of the counter jack 11.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (3)
1. A special bending and shearing test loading method for a steel-concrete structure test piece is characterized by comprising the following steps of: the device comprises a loading frame (1), a base (2), a base jack (3), a steel-concrete structure test piece (4), a steel end part (5), a chute (6), a loading jack (7), a displacement measurer (8), an imaging jack (9), a concrete fault ultrasonic imager (10) and a counter-force jack (11), wherein the base jack (3) is arranged in a bottom groove of the loading frame (1), the base (2) is arranged on the top surface of the base jack (3), the steel-concrete structure test piece (4) is arranged on the top surface of the base (2), the steel end part (5) is arranged at the left end of the steel-concrete structure test piece (4), the chute (6) is arranged on the top plate bottom surface of the loading frame (1), the loading jack (7), the imaging jack (9) and the counter-force jack (11) are sequentially arranged in the chute (6) from left to right, and can move left to right along the chute (6), and the imaging jack (8) is fixedly arranged on the bottom surface of the imaging jack (9), and the imaging jack (10) is arranged on the bottom surface of the concrete;
the loading method of the special bending and shearing test loading device for the steel-concrete structural test piece comprises the following steps of:
a) Unloading the oil pressure in the loading jack (7), the imaging jack (9) and the counter-force jack (11) to keep the working length to be the shortest;
b) The height of the base jack (3) is adjusted, so that the base (2) is kept flush with the bottom of the loading frame (1), a steel-concrete structure test piece (4) is placed on the base (2), and the direction of the steel end part (5) of the steel-concrete structure test piece (4) is adjusted to be consistent with the direction of the loading jack (7);
c) The height of the base jack (3) is adjusted, the base (2) is lifted or lowered, the height difference between the steel end part (5) and the loading jack (7) is as small as possible, and the height difference between the upper surface of the steel-concrete structure test piece (4) and the concrete fault ultrasonic imager (10) is as small as possible;
d) The positions of the loading jack (7), the imaging jack (9) and the counter-force jack (11) in the chute (6) are moved, and the specific bending and shearing experiment requires to adjust the specific position of the loading jack (7) above the steel end (5), so that the imaging jack (9) is kept right above one side, close to the steel end (5), of the upper surface of the steel-concrete structure test piece (4), and the counter-force jack (11) is kept right above the other end, close to the steel end (5), of the upper surface of the steel-concrete structure test piece (4);
e) The working length of the counter jack (11) is adjusted, so that the counter jack (11) is pressed on the steel-concrete structure test piece (4) and is stressed but not excessively stressed, and the steel-concrete structure test piece (4) is prevented from turning on one's side;
f) The working length of the imaging jack (9) is adjusted, so that the concrete fault ultrasonic imaging instrument (10) is pressed on the upper surface of the steel-concrete structure test piece (4), and the contact but no stress of the concrete fault ultrasonic imaging instrument (10) is ensured;
g) The working length of a loading jack (7) is regulated, bending and shearing test loading is carried out on the steel end part (5) of the steel-concrete structure test piece (4), data of a displacement measurer (8) and other deformation data are recorded in real time in the loading process, and image changes of a concrete fault ultrasonic imager (10) are recorded in real time;
h) After loading is finished, the concrete fault ultrasonic imaging instrument (10) is closed, the oil pressure of the loading jack (7), the imaging jack (9) and the counter jack (11) is unloaded, so that the loading jack, the imaging jack and the counter jack are kept in the shortest working degree state, a picture of the damage state of a test piece is taken, the steel-concrete structural test piece is removed, and the work is finished.
2. The special bending and shearing test loading method for the steel-concrete structural test piece according to claim 1, which is characterized by comprising the following steps of: the displacement measurer (8) is fixed at the bottom of the loading jack (7) and the displacement measurer (8) is not detachable.
3. The special bending and shearing test loading method for the steel-concrete structural test piece according to claim 1, which is characterized by comprising the following steps of: the working length of the loading jack (7) is longer than that of the counter-force jack (11).
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| CN201811533153.7A CN109520821B (en) | 2018-12-14 | 2018-12-14 | Special bending and shearing test loading device and loading method for steel-concrete structure test piece |
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| CN201811533153.7A CN109520821B (en) | 2018-12-14 | 2018-12-14 | Special bending and shearing test loading device and loading method for steel-concrete structure test piece |
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| CN109520821A CN109520821A (en) | 2019-03-26 |
| CN109520821B true CN109520821B (en) | 2024-02-09 |
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| CN111380756B (en) * | 2020-02-18 | 2022-12-06 | 广东粤检工程质量检测有限公司 | Loading tool for measuring compression bending moment of reinforced concrete beam |
| CN116223198A (en) * | 2023-04-12 | 2023-06-06 | 上海隧道工程有限公司 | Loading system for mechanical test of reinforced concrete composite structure |
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Application publication date: 20190326 Assignee: Jiangsu Xinsui Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2025980039802 Denomination of invention: A special loading device for bending and shear tests of steel-concrete composite specimens and its loading method Granted publication date: 20240209 License type: Common License Record date: 20251201 Application publication date: 20190326 Assignee: Zhejiang qianrui Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2025980039830 Denomination of invention: A special loading device for bending and shear tests of steel-concrete composite specimens and its loading method Granted publication date: 20240209 License type: Common License Record date: 20251201 Application publication date: 20190326 Assignee: Suzhou Luwei Intelligent Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2025980040370 Denomination of invention: A special loading device for bending and shear tests of steel-concrete composite specimens and its loading method Granted publication date: 20240209 License type: Common License Record date: 20251203 |