CN210375929U - Concrete creep multifunctional test system - Google Patents
Concrete creep multifunctional test system Download PDFInfo
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- CN210375929U CN210375929U CN201920880236.7U CN201920880236U CN210375929U CN 210375929 U CN210375929 U CN 210375929U CN 201920880236 U CN201920880236 U CN 201920880236U CN 210375929 U CN210375929 U CN 210375929U
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Abstract
The utility model relates to a concrete creep multifunctional test system, which comprises a counter-force base, a first counter-force column, a second counter-force column, a third counter-force column and a counter-force component for placing a concrete sample, wherein the first counter-force column, the second counter-force column and the third counter-force column are arranged on the counter-force base; the first reaction column, the reaction assembly and the third reaction column are sequentially arranged on the same horizontal line, and the second reaction column is arranged on the other horizontal line; the first reaction column is connected with the third reaction column through a reaction beam; be equipped with a confined pressure servo actuator between counter-force roof beam and the counter-force subassembly, be equipped with No. two confined pressure servo actuator between No. two counter-force posts and the counter-force subassembly, be equipped with axial servo actuator between a counter-force post and the counter-force subassembly. The test system can realize concrete single-axis and three-axis creep test, does not need counter-force devices such as counter-force floors and the like, reduces the requirements on an experimental field, and can also realize multifunctional and multipurpose loading test through the free combination of the counter-force frames.
Description
Technical Field
The utility model belongs to structural test field, concretely relates to concrete creep multifunctional test system.
Background
In the field of civil engineering, concrete is the most commonly used construction material, and because of its advantages of high strength, good durability and low cost, it is widely used in the field of engineering. However, concrete materials have obvious creep in the process of hydration reaction and long-term service, the creep of concrete can cause cracking of a concrete structure, and particularly for a prestressed structure, the creep of concrete can cause stress relaxation of prestressed tendons, the bearing capacity of the structure can be reduced, the deformation of the structure can be increased, and hidden dangers are brought to the safety of the structure. Therefore, the research on the creep characteristic of the concrete is of great significance to the concrete structure, but the creep of the concrete at the present stage is mostly measured in a uniaxial loading mode, the obtained change rule of the uniaxial creep of the concrete is obtained, the concrete in the actual engineering structure is usually in a triaxial stress state, the creep characteristic of the concrete in the triaxial stress state is still to be further researched, the triaxial creep of the concrete needs to be orthogonally loaded in the three axial directions of a concrete test piece, and in order to solve the difficulty of triaxial creep loading and testing of the concrete, the utility model discloses a multifunctional test system capable of realizing triaxial creep of the concrete is of great significance to scientific research and engineering practice.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a concrete creep multifunctional test system can detect the concrete test piece and creep under triaxial stress state, solves the technical problem of concrete triaxial creep loading and test difficulty.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the concrete creep multifunctional test system comprises a reaction base, a first reaction column, a second reaction column, a third reaction column and a reaction component, wherein the first reaction column, the second reaction column, the third reaction column and the reaction component are arranged on the reaction base; the first reaction column is connected with the third reaction column through a reaction beam; be equipped with a confined pressure servo actuator between counter-force roof beam and the counter-force subassembly, be equipped with No. two confined pressure servo actuator between No. two counter-force posts and the counter-force subassembly, be equipped with axial servo actuator between a counter-force post and the counter-force subassembly, the axis quadrature of a confined pressure servo actuator, No. two confined pressure servo actuator and axial servo actuator.
Further, according to the multifunctional test system for creep of concrete, a first distribution cushion block is arranged between the first confining pressure servo actuator and the counter-force assembly; a second distribution cushion block is arranged between the second confining pressure servo actuator and the counter-force component; and an axial distribution cushion block is arranged between the axial servo actuator and the counter-force component.
Further, as mentioned above, the multifunctional test system for creep of concrete comprises a reaction base and a reaction pedestal arranged on the reaction base, wherein the reaction pedestal comprises a bottom plate and an L-shaped stop block arranged on the bottom plate and used for limiting the displacement of the concrete sample.
Further, according to the multifunctional test system for creep of concrete, a bottom plate of the counter-force pedestal is further provided with a limiting device for limiting the movement of the second distribution cushion block.
Further, as mentioned above, the multifunctional test system for creep of concrete, wherein the reaction base is of a T-shaped structure and comprises a horizontal part and a vertical part, the first reaction column, the reaction assembly and the third reaction column are arranged on the horizontal part, and the second reaction column is arranged on the vertical part.
Further, according to the multifunctional test system for creep of concrete, bolt holes for adjusting the horizontal position are respectively formed in the reaction base, the reaction base and the reaction beam; and bolt holes for adjusting the vertical height are respectively arranged on the first reaction column, the second reaction column and the third reaction column.
Furthermore, as above-mentioned a concrete creeps multi-functional test system, all be equipped with the data acquisition appearance on a confined pressure servo actuator, No. two confined pressure servo actuators and the axial servo actuator, this data acquisition appearance is including the force sensor who is used for detecting the concrete sample loading condition and the displacement sensor who is used for detecting the concrete sample removal condition.
Further, according to the multifunctional test system for concrete creep, the data acquisition instruments are controlled by the servo control system, and the servo control system realizes the synchronism of the data acquisition instruments through the arranged time trigger device.
Furthermore, like the multifunctional test testing system for concrete creep described above, the first confining pressure servo actuator, the second confining pressure servo actuator and the axial servo actuator respectively provide power through a hydraulic system, and the hydraulic system comprises an energy accumulator and a hydraulic pump station for providing an oil source for the energy accumulator.
Further, according to the multifunctional test system for concrete creep, the hydraulic pump station and the energy accumulator are respectively connected with the servo control system through respective connecting lines; when the servo control system detects that the pressure of the hydraulic pump station reaches the upper limit of the set pressure range, the hydraulic pump station automatically stops, the pressure is maintained by the energy accumulator, and when the servo control system detects that the pressure of the hydraulic pump station reaches the lower limit of the set pressure range, the hydraulic pump station starts automatic pressure compensation.
The utility model has the advantages of:
(1) the utility model discloses a set up self-balancing assembled reaction frame and triaxial actuator, realized concrete unipolar, biax and triaxial creep test, do not need counter-force devices such as counter-force floor, reduced the requirement to the experiment place, still accessible reaction frame's independent assortment realizes the loading test of multi-functional, multipurpose, improves building structure's security and reliability.
(2) The three servo actuators respectively provide power through a hydraulic system, the stress path is clear, the orthogonal forces in the three directions are mutually independent and do not interfere with each other, and free loading and control can be realized.
(3) The three servo actuators and the hydraulic system are respectively controlled by the servo control system, so that real-time loading control and data acquisition control can be realized, and the accuracy of experimental data is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the testing system of the present invention;
FIG. 2 is a schematic structural view of the reaction assembly of the present invention;
FIG. 3 is a schematic structural view of the reaction force pedestal of the present invention;
fig. 4 is a control diagram of the servo control system of the present invention.
In the figure: 1-reaction base, 2-reaction base, 3-first reaction column, 4-reaction beam, 5-axial servo actuator, 6-hydraulic pump station, 7-oil source pipeline, 8-energy accumulator, 9-limiting device, 10-reaction base, 11-first confining pressure servo actuator, 12-first distribution cushion block, 13-second confining pressure servo actuator, 14-second reaction column, 15-third reaction column, 16-second distribution cushion block, 17-axial distribution cushion block, 18-servo controller, 19-servo control unit, 20-control line, 101-bottom plate, 102-L type stop block
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
It should be noted that the embodiments described herein are specific embodiments of the present invention, and are intended to illustrate the concepts of the present invention, which are illustrative and exemplary, and should not be construed as limiting the scope of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
As shown in fig. 1, it is the utility model provides a concrete creep multifunctional test system, including reaction base 1 and set up reaction column 3, No. two reaction columns 14, No. three reaction columns 15 and the reaction subassembly on reaction base 1. Reaction column 3, reaction subassembly and No. three reaction column 15 set gradually on same water flat line, and No. two reaction column 14 and reaction column 3, reaction subassembly and No. three reaction column 15 set up on different water flat lines. The first reaction column 3 is connected with the third reaction column 15 through a reaction beam 4. Be equipped with between counter-force beam 4 and the counter-force subassembly and enclose No. one and press servo actuator 11, be equipped with between No. two counter-force post 14 and the counter-force subassembly and enclose and press servo actuator 13 No. two, be equipped with axial servo actuator 5 between No. one counter-force post 3 and the counter-force subassembly, enclose and press servo actuator 11, enclose and press servo actuator 13 and axial servo actuator 5 three axis quadrature No. one.
Reaction force assembly, reaction force post 3, No. two reaction force posts 14, No. three reaction force posts 15 pass through high strength bolt fastening on reaction base 1, reaction beam 4 through high strength bolt respectively with reaction force post 3 and No. three reaction force post 15 fixed connection, axial servo actuator 5 is through high strength bolt and No. 3 fixed connection of reaction force post, No. one enclose and press servo actuator 11 through high strength bolt and 4 fixed connection of reaction force beam, No. two enclose and press servo actuator 13 through high strength bolt and No. two reaction force post 14 fixed connection, thereby form a holistic self-balancing reaction frame.
Therefore, the utility model discloses a self-balancing assembled reaction frame and three servo actuator, realized the concrete unipolar, biax and triaxial creep test, the technical problem of concrete triaxial creep loading and test difficulty has been solved, and when the test, three orthotropic's counter force is respectively through a reaction column, No. two reaction columns, No. three reaction columns, the counter-force roof beam, the counter-force base, counter-force base and counter-force pedestal undertake, do not need counter-force devices such as counter-force floor, the requirement to the experiment place has been reduced, and the cost is saved.
In order to ensure the testing accuracy and avoid damage to the actuator, a first distribution cushion block 12 is respectively arranged between a first confining pressure servo actuator 11 and the top surface of the concrete sample; a second distribution cushion block 16 is arranged between the second confining pressure servo actuator 13 and the side surface of the concrete sample; an axial distribution cushion block 17 is arranged between the axial servo actuator 5 and the end face of the concrete sample.
The reaction base 1 is a T-shaped structure and includes a horizontal portion and a vertical portion, the first reaction column 3, the reaction assembly, and the third reaction column 15 are disposed on the horizontal portion of the reaction base 1, and the second reaction column 14 is disposed on the vertical portion of the reaction base 1. Simple structure, and convenient triaxial creep test and equipment installation of concrete.
A plurality of bolt holes for adjusting the horizontal position are respectively arranged on the reaction base 1, the reaction component and the reaction beam 4; a plurality of bolt holes used for adjusting the vertical height are respectively arranged on the first reaction column 3, the second reaction column 14 and the third reaction column 15. Therefore, the test requirements of test pieces with different specifications and sizes can be met, and the multifunctional and multipurpose loading test target is realized.
As shown in fig. 2, the reaction force unit includes a reaction force base 2 and a reaction force base 10 provided on the reaction force base 2, and the reaction force base 2 and the reaction force base 10 are fixedly connected to each other. The reaction base 2 includes a connecting plate and a rib plate provided on the connecting plate, a bolt hole is provided on the connecting plate for connecting with the reaction base 1, and the rib plate is connected with the reaction pedestal 10 by welding or other methods for supporting the reaction pedestal 10. Simple structure, the practicality is strong.
As shown in fig. 3, the reaction force base 10 includes a bottom plate 101, an L-shaped stopper 102 provided on the bottom plate 101 for restricting the displacement of the concrete sample, and a stopper 9 provided on the bottom plate 101 for restricting the displacement of the second distribution mat 16. The limiting device 9 is composed of two limiting plates which are square plates and are arranged on the same horizontal line. The reaction pedestal 10 is used for placing a concrete sample, and the size of the reaction pedestal 10 can be adjusted adaptively according to the size and structure of the concrete sample.
All the parts are made of metal materials, so that the bearing is good in durability and can adapt to long-term loading.
As shown in fig. 4, the axial servo actuator 5, the first confining pressure servo actuator 11 and the second confining pressure servo actuator 13 are all connected with a hydraulic system through respective pipelines, and are powered by the hydraulic system.
Therefore, the stress paths of the actuators in the three different directions are clear, the orthogonal forces in the three directions are independent and do not interfere with each other, and free loading and control can be realized.
The hydraulic system comprises an energy accumulator 8 and a hydraulic pump station 6, and the hydraulic pump station 6 supplies oil source to the energy accumulator 8 through an oil source pipeline 7. The energy accumulator 8 and the hydraulic pump station 6 are both connected with the servo control system through connecting wires. Therefore, when the test system works, the hydraulic pump station 6 supplies oil to the energy accumulator 8, the energy accumulator 8 supplies oil to the axial servo actuator 5, the first confining pressure servo actuator 11 and the second confining pressure servo actuator 13, when the servo control system detects that the pressure of the hydraulic pump station 6 reaches the upper limit of the set pressure range, the automatic stop is carried out, the pressure is maintained by the energy accumulator 8, and when the servo control system detects that the pressure of the hydraulic pump station 6 reaches the lower limit of the set pressure range, the hydraulic pump station 6 starts automatic pressure compensation. Therefore, the hydraulic pump station 6, the energy accumulator 8 and the servo control system are matched with each other, so that long-term force maintenance can be realized, and the requirements of concrete creep test on long-term high-precision loading can be met.
As shown in fig. 4, the first confining pressure servo actuator 11, the second confining pressure servo actuator 13 and the axial servo actuator 5 are respectively provided with a data acquisition instrument, and the data acquisition instrument comprises a force sensor and a displacement sensor. The force sensor is used for detecting the loading condition of the concrete sample, and the displacement sensor is used for detecting the moving condition of the concrete sample. The axial servo actuator 5, the first confining pressure servo actuator 11 and the second confining pressure servo actuator 13 are respectively connected with a servo control system through respective control lines 20, and a time trigger device is arranged on the servo control system, so that the collection quantity of each data acquisition instrument is controlled, the convenience of experimental data processing is ensured, the synchronism of each data acquisition instrument is effectively realized, and the accuracy of data collection is ensured. In the testing process, each servo actuator applies axial pressure and lateral confining pressure to the concrete test piece through each distribution cushion block, force and displacement measurement is achieved through the data acquisition instrument, and the strain gauge embedded in the concrete test piece in advance is used for measuring stress change, so that creep testing experiments of the concrete test piece are completed.
The servo control system includes a servo controller 18 and a servo control unit 19. The servo controller 18 is used for receiving signals transmitted by the hydraulic system and each data acquisition instrument and transmitting the signals to the servo control unit 19, and after the signals are processed by the servo control unit 19, the signals are converted into instructions and transmitted to the hydraulic system and each servo actuator through the servo controller 18.
The utility model discloses a concrete creeps multi-functional test system is not limited to above-mentioned specific implementation, and the skilled person in the art basis the utility model discloses a technical scheme reachs other implementation, belongs to equally the utility model discloses a technical innovation scope.
Claims (10)
1. The utility model provides a concrete creeps multi-functional test system, includes reaction base (1), sets up reaction column (3) on reaction base (1), No. two reaction column (14), No. three reaction column (15) and be used for placing the reaction subassembly of concrete sample, characterized by: the first reaction column (3), the reaction assembly and the third reaction column (15) are sequentially arranged on the same horizontal line, and the second reaction column (14) is arranged on the other horizontal line; the first reaction column (3) is connected with the third reaction column (15) through a reaction beam (4); be equipped with between counter-force roof beam (4) and the counter-force subassembly and enclose No. one and press servo actuator (11), be equipped with between No. two counter-force post (14) and the counter-force subassembly and enclose and press servo actuator (13) No. two, be equipped with axial servo actuator (5) between a counter-force post (3) and the counter-force subassembly, enclose the axis quadrature that presses servo actuator (11), No. two enclose and press servo actuator (13) and axial servo actuator (5).
2. The concrete creep multifunctional test system as claimed in claim 1, wherein: a first distribution cushion block (12) is arranged between the first confining pressure servo actuator (11) and the counter-force component; a second distribution cushion block (16) is arranged between the second confining pressure servo actuator (13) and the counter-force component; an axial distribution cushion block (17) is arranged between the axial servo actuator (5) and the counter-force component.
3. The concrete creep multifunctional test system as claimed in claim 2, wherein: the reaction force assembly comprises a reaction force base (2) and a reaction force pedestal (10) arranged on the reaction force base (2), wherein the reaction force pedestal (10) comprises a bottom plate (101) and an L-shaped stop block (102) arranged on the bottom plate (101) and used for limiting the displacement of the concrete sample.
4. A concrete creep multifunctional test system as claimed in claim 3, wherein: and a limiting device (9) for limiting the movement of the second distribution cushion block (16) is further arranged on the bottom plate (101) of the reaction force pedestal (10).
5. The concrete creep multifunctional test system as claimed in claim 4, wherein: reaction base (1) is T type structure, including horizontal part and vertical part, and No. one reaction column (3), reaction subassembly and No. three reaction column (15) set up at the horizontal part, and No. two reaction column (14) set up at the vertical part.
6. The concrete creep multifunctional test system as claimed in claim 5, wherein: bolt holes for adjusting the horizontal position are respectively arranged on the reaction base (1), the reaction base (2) and the reaction beam (4); bolt holes for adjusting the vertical height are respectively arranged on the first reaction column (3), the second reaction column (14) and the third reaction column (15).
7. A concrete creep multifunctional test system as claimed in any one of claims 1-6, wherein: a enclose and press servo actuator (11), No. two enclose and press servo actuator (13) and axial servo actuator (5) on all be equipped with the data acquisition appearance, this data acquisition appearance is including the force sensor who is used for detecting the concrete test piece loading condition and the displacement sensor who is used for detecting the concrete test piece removal condition.
8. The concrete creep multifunctional test system of claim 7, wherein: each data acquisition instrument is controlled by a servo control system, and the servo control system controls the synchronism of each data acquisition instrument through a set time trigger device.
9. The concrete creep multifunctional test system of claim 8, wherein: a confined pressure servo actuator (11), No. two confined pressure servo actuator (13) and axial servo actuator (5) provide power through hydraulic system respectively, and hydraulic system includes energy storage ware (8) and provides hydraulic power unit (6) of oil supply to energy storage ware (8).
10. The concrete creep multifunctional test system of claim 9, wherein: the hydraulic pump station (6) and the energy accumulator (8) are controlled by the servo control system; when the servo control system detects that the pressure of the hydraulic pump station (6) reaches the upper limit of the set pressure range, the hydraulic pump station is automatically stopped, the pressure is maintained by the energy accumulator (8), and when the servo control system detects that the pressure of the hydraulic pump station (6) reaches the lower limit of the set pressure range, the hydraulic pump station (6) starts automatic pressure compensation.
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| CN201920880236.7U CN210375929U (en) | 2019-06-12 | 2019-06-12 | Concrete creep multifunctional test system |
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| CN201920880236.7U CN210375929U (en) | 2019-06-12 | 2019-06-12 | Concrete creep multifunctional test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174304A (en) * | 2019-06-12 | 2019-08-27 | 中冶建筑研究总院有限公司 | A kind of concrete creep multifunction test test macro |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174304A (en) * | 2019-06-12 | 2019-08-27 | 中冶建筑研究总院有限公司 | A kind of concrete creep multifunction test test macro |
| CN110174304B (en) * | 2019-06-12 | 2024-04-05 | 中冶建筑研究总院有限公司 | Multifunctional test system for concrete creep |
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