CN118032478A - Novel bending torsion test device for structural test - Google Patents
Novel bending torsion test device for structural test Download PDFInfo
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- CN118032478A CN118032478A CN202410125517.7A CN202410125517A CN118032478A CN 118032478 A CN118032478 A CN 118032478A CN 202410125517 A CN202410125517 A CN 202410125517A CN 118032478 A CN118032478 A CN 118032478A
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- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 238000005452 bending Methods 0.000 title claims abstract description 29
- 230000003068 static effect Effects 0.000 claims abstract description 21
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000012029 structural testing Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention belongs to the field of civil engineering, and particularly relates to a novel bending and twisting test device for a structural test. The technical scheme of the invention is as follows: the novel bending torsion test device for the structural test comprises a square fixing table, a coordinated lifting loading device, a counter-force frame, a counter-force wall and a static force pedestal, wherein the square fixing table is arranged in the middle of the static force pedestal, the counter-force wall is arranged at one end of the static force pedestal, the counter-force frame consists of a cross beam and a vertical column which are connected at right angles, the vertical column is arranged at the other end of the static force pedestal, and the cross beam is fixedly connected with the counter-force wall; the coordinated lifting loading device is arranged at the lower part of the cross beam and is in sliding connection with the counter-force wall. The novel bending and torsion test device for the structural test can carry out the same loading test on large, medium and small components, and avoid errors; the test piece can be kept in a static state by friction force on the upper surface and the lower surface when being pressed, and the fixing mode is stable.
Description
Technical Field
The invention belongs to the field of civil engineering, and particularly relates to a novel bending and twisting test device for a structural test.
Background
The stress, bending and torsion test of the structural member is a common test method in the civil engineering field, and has very important roles in evaluating the bearing capacity, the safety coefficient, the anti-seismic performance and the improvement direction of the structural member. The structural member bending detection technology refers to a nondestructive detection technology for evaluating performance and safety conditions of a concrete structural member by performing a bending test on the structural member and measuring bending deformation and strength parameters thereof. The compressive strength of concrete is one of the most important performance indexes of concrete, and directly affects the bearing capacity and durability of the concrete structure. Therefore, the detection of the compressive strength of the concrete is an important link for the quality control of the construction engineering. In addition, it is also of vital importance for other forms of construction. The torsion test is a test for measuring the torque resistance of a cross section of a component, and is one of basic test methods for testing the mechanical properties of a component material. In a bending test, if two horizontal electro-hydraulic servo actuators cannot synchronously load the components, bending moment except for a preset direction is generated, and the accuracy of the test is seriously affected. In the torsion-compression test, the upper end and the lower end of the component are not reliably connected with the test device, and friction force is generated only by the vertical hydraulic jack, the upper side surface of the square fixed pedestal and the rough surface of the lower surface of the box-type structure pressing plate, so that the test piece is kept in a static state.
When loading test is carried out on large, medium and small components, test devices with proper sizes are needed to be used respectively; loading is carried out on different test devices corresponding to components with different sizes, so that measurement errors can be caused.
Disclosure of Invention
The invention provides a novel bending and torsion test device for a structural test, which can carry out the same loading test on large, medium and small components and avoid errors; the test piece can be kept in a static state by friction force on the upper surface and the lower surface when being pressed, and the fixing mode is stable.
The technical scheme of the invention is as follows:
the novel bending torsion test device for the structural test comprises a square fixing table, a coordinated lifting loading device, a counter-force frame, a counter-force wall and a static force pedestal, wherein the square fixing table is arranged in the middle of the static force pedestal, the counter-force wall is arranged at one end of the static force pedestal, the counter-force frame consists of a cross beam and a vertical column which are connected at right angles, the vertical column is arranged at the other end of the static force pedestal, and the cross beam is fixedly connected with the counter-force wall; the coordinated lifting loading device is arranged at the lower part of the cross beam and is in sliding connection with the counter-force wall.
Further, the novel bending torsion test device for the structural test comprises a support, a box-type structural pressing plate, a horizontal electro-hydraulic servo actuator, a vertical hydraulic jack and a pulley, wherein two parallel horizontal electro-hydraulic servo actuators are arranged between the support and the box-type structural pressing plate, a vertical hydraulic jack is respectively arranged between the support and the cross beam and between the box-type structural pressing plate and the cross beam, the side part of the support is fixedly connected with the pulley, a guide rail is arranged on the side surface of the counterforce wall, and the pulley is in sliding fit with the guide rail.
Further, the novel bending torsion test device for the structural test is characterized in that the box-type structural pressing plate corresponds to the square fixing table in position, and a test piece is arranged between the box-type structural pressing plate and the square fixing table.
Further, the novel bending and torsion test device for the structural test is characterized in that the box-type structural pressing plate is prepared by arranging a plurality of stiffening ribs on the side part of the I-shaped steel.
The beneficial effects of the invention are as follows:
1. according to the invention, the vertical hydraulic jack loads the box-type structure pressing plate through vertical pressurization, so that the upper surface and the lower surface of the test piece are kept in a static state under friction force while being pressurized, and adverse effects on components caused by other fixing modes are avoided.
2. According to the invention, the two horizontal electro-hydraulic servo actuators are used for loading the direction vertical to the axial section of the component, so that the component is subjected to a bending or torsion loading test; the bending test of the component is realized by synchronously advancing or backing two horizontal electro-hydraulic servo actuators by the same distance; the torsion test of the component is realized by synchronously loading the two horizontal electro-hydraulic servo actuators one after the other; horizontal counter force is provided by means of a counter force wall.
3. The coordination lifting loading device can ensure that the vertical acting force and the horizontal acting force are always vertical, and component forces in other directions can not be generated to interfere with the test.
4. The invention enables the large, medium and small structural members with different sizes to be subjected to the bending and twisting test under the same loading device, and avoids errors caused by non-uniformity of the testing device.
Drawings
FIG. 1 is a schematic diagram of a novel press bending torsion test device for structural test;
FIG. 2 is a schematic view of a counterforce wall and static stand;
FIG. 3 is a schematic diagram of a coordinated lifting loading device;
FIG. 4 is a schematic view of a platen of box-type construction;
FIG. 5 is a graph of the test piece bending test force and internal force;
FIG. 6 is a graph of the stress and internal force of the test piece in the compression torsion test.
Detailed Description
As shown in fig. 1-4, a novel bending and torsion test device for structural test comprises a square fixed table 2, a coordinated lifting loading device 5, a counter-force frame 4, a counter-force wall 3 and a static force pedestal 1, wherein the square fixed table 2 is arranged in the middle of the static force pedestal 1, the counter-force wall 3 is arranged at one end of the static force pedestal 1, the counter-force frame 4 consists of a cross beam and a vertical post which are connected at right angles, the vertical post is arranged at the other end of the static force pedestal 1, and the cross beam is fixedly connected with the counter-force wall 3; the coordinated lifting loading device 5 is arranged at the lower part of the cross beam and is in sliding connection with the counter-force wall 3. The coordinated lifting loading device 5 comprises a support 9, a box-type structure pressing plate 10, a first horizontal electro-hydraulic servo actuator 11, a second horizontal electro-hydraulic servo actuator 12, a first vertical hydraulic jack 13, a second vertical hydraulic jack 14 and a pulley 8, wherein the first horizontal electro-hydraulic servo actuator 11 and the second horizontal electro-hydraulic servo actuator 12 which are parallel are arranged between the support 9 and the box-type structure pressing plate 10, the second vertical hydraulic jack 14 is arranged between the support 9 and the cross beam, the first vertical hydraulic jack 13 is arranged between the box-type structure pressing plate 10 and the cross beam, the side part of the support 9 is fixedly connected with the pulley 8, a guide rail 7 is arranged on the side surface of the counter-force wall 3, and the pulley 8 is in sliding fit with the guide rail 7. The box-type structure pressing plate 10 corresponds to the square fixed table 2 in position, and a test piece 6 is arranged between the box-type structure pressing plate 10 and the square fixed table 2. The box structure platen 10 is prepared by arranging a plurality of stiffening ribs 16 on the side of the I-shaped steel 15.
The working process is as follows:
1. Performing pure pressure test
The first vertical hydraulic jack 13 and the second vertical hydraulic jack 14 are controlled to synchronously perform lifting adjustment to coordinate the height of the lifting loading device 5, and the test piece 6 is placed at the center of the square fixed table 2; the cooperative lifting device 5 is lowered to a proper height to compress the test piece 6, and the position of the pulley 8 on the guide rail 7 is fixed; the test piece 6 is vertically loaded by utilizing a first vertical hydraulic jack 13;
2. Performing a compression torsion test
The test piece 6 is vertically loaded, the test piece 6 is forced by utilizing the same distance of the front-back actuation of the first horizontal electro-hydraulic servo actuator 11 and the second horizontal electro-hydraulic servo actuator 12, the horizontal counter force is provided by the counter force wall 3 and transmitted through the guide rail 7 and the pulley 8, the torque is applied to the test piece 6, and the friction force is generated on the upper surface and the lower surface of the test piece 6 due to the vertical pressure so that the test piece 6 is kept still; the first vertical hydraulic jack 13 is loaded to F 1, the first horizontal electro-hydraulic servo actuator 11 and the second horizontal electro-hydraulic servo actuator 12 are controlled to be respectively loaded to F 2/2, and the bending moment and the axial force of the test piece 6 under the combined action of F 1 and F 2 are shown in FIG 5;
3. Performing bias test
The test piece 6 is vertically loaded, the first horizontal electro-hydraulic servo actuator 11 is pushed forwards, and the second horizontal electro-hydraulic servo actuator 12 is retracted backwards for the same distance at the same time to apply bending moment to the test piece 6; the first vertical hydraulic jack 13 is loaded to the F 1, the first horizontal electro-hydraulic servo actuator 11 applies pressure, the second horizontal electro-hydraulic servo actuator 12 applies tensile force to the F 2, and the torque and the axial force of the test piece 6 under the combined action of the F 1 and the F 2 are shown in fig. 6.
Claims (4)
1. The novel bending torsion test device for the structural test is characterized by comprising a square fixing table, a coordinated lifting loading device, a reaction frame, a reaction wall and a static force pedestal, wherein the square fixing table is arranged in the middle of the static force pedestal, the reaction wall is arranged at one end of the static force pedestal, the reaction frame consists of a cross beam and a vertical post which are connected at right angles, the vertical post is arranged at the other end of the static force pedestal, and the cross beam is fixedly connected with the reaction wall; the coordinated lifting loading device is arranged at the lower part of the cross beam and is in sliding connection with the counter-force wall.
2. The novel bending torsion test device for the structural test according to claim 1, wherein the coordinated lifting loading device comprises a support, a box-type structural pressing plate, a horizontal electro-hydraulic servo actuator, a vertical hydraulic jack and a pulley, wherein two parallel horizontal electro-hydraulic servo actuators are arranged between the support and the box-type structural pressing plate, a vertical hydraulic jack is respectively arranged between the support and the cross beam and between the box-type structural pressing plate and the cross beam, the side part of the support is fixedly connected with the pulley, a guide rail is arranged on the side surface of a counterforce wall, and the pulley is in sliding fit with the guide rail.
3. The novel bending and torsion testing device for structural testing according to claim 2, wherein the box-type structural pressing plate corresponds to the square fixing table in position, and a test piece is arranged between the box-type structural pressing plate and the square fixing table.
4. The novel bending and torsion test device for structural test according to claim 2, wherein the box-type structural press plate is prepared by arranging a plurality of stiffening ribs on the side of the i-shaped steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410125517.7A CN118032478A (en) | 2024-01-30 | 2024-01-30 | Novel bending torsion test device for structural test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410125517.7A CN118032478A (en) | 2024-01-30 | 2024-01-30 | Novel bending torsion test device for structural test |
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| Publication Number | Publication Date |
|---|---|
| CN118032478A true CN118032478A (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410125517.7A Pending CN118032478A (en) | 2024-01-30 | 2024-01-30 | Novel bending torsion test device for structural test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118032478A (en) |
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2024
- 2024-01-30 CN CN202410125517.7A patent/CN118032478A/en active Pending
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