CN220399092U - Self-balancing counter-force loading device for large test piece mechanical test - Google Patents
Self-balancing counter-force loading device for large test piece mechanical test Download PDFInfo
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- CN220399092U CN220399092U CN202321568840.9U CN202321568840U CN220399092U CN 220399092 U CN220399092 U CN 220399092U CN 202321568840 U CN202321568840 U CN 202321568840U CN 220399092 U CN220399092 U CN 220399092U
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- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 238000009826 distribution Methods 0.000 claims abstract description 36
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Abstract
The utility model relates to the technical field of civil engineering experiments, in particular to a self-balancing counter-force loading device for a large-scale test piece mechanical experiment, which comprises the following components: the reaction frame comprises an upper cross beam, reinforcing steel bars and a lower cross beam from top to bottom, wherein the two ends of the upper cross beam are provided with upper mounting pieces, the two ends of the corresponding lower cross beam are provided with lower mounting pieces, and the reinforcing steel bars penetrate through the upper mounting pieces and the lower mounting pieces at the same time; an upper longitudinal beam; a side sill; and the distribution beam is used for transmitting force to the upper longitudinal beam, and the gravity center of the distribution beam is aligned with that of the upper longitudinal beam. The device is used for solving the problems that the occupation cost of a traditional self-balancing counter-force system is high, an outdoor test is easily affected by geological conditions, the loading position is fixed, and the universality is not strong, realizing the prefabricated assembly of the loading device, quickly building and using the device, improving the using convenience of the loading device, realizing the adjustment of loading points by adjusting the positions of the upper longitudinal beam and the distribution beam, and improving the universality of the loading device.
Description
Technical Field
The utility model relates to the technical field of civil engineering tests, in particular to a self-balancing counter-force loading device for a large test piece mechanical test.
Background
In civil engineering, in order to facilitate understanding of the stress performance of concrete beams, plates and other components, static loading tests can be carried out on the concrete beams, plates and other components, the conventional static loading mode is divided into stacking loading and jack loading, and for large-scale structures, a transport vehicle is required to be matched with a crane during the stacking test, and the loading test cost is high; the jack loading is relatively easy and convenient to operate and has higher loading efficiency.
For the self-balancing loading device, a self-balancing counter-force loading system is formed by adopting a form of excavating a foundation pouring concrete ground anchor and an overground steel beam through reinforcing steel bar force transmission, and a pressure sensor and a jack are arranged below the steel beam to realize loading. However, the device is easy to be influenced by external factors such as geological conditions and the like when in outdoor test because a foundation is required to be excavated and a concrete anchor is poured, and the concrete needs a certain time to reach the strength, so that the occupied site time is longer, and the cost is increased; in addition, the device passes power reinforcing bar pre-buried in concrete ground anchor, and its concrete position needs to customize according to loading operating mode, and loading position is fixed promptly, and the commonality is not strong. Therefore, the whole set of counter-force loading device is formed by prefabricating and assembling steel structures, foundation excavation is not needed, the foundation can be quickly built and put into use on site, a jack loading area adopts a longitudinal and transverse steel beam combination mode, loading positions can be freely adjusted, and the whole set of loading device has the characteristics of convenience and high applicability.
Disclosure of Invention
The utility model aims to overcome at least one defect (deficiency) of the prior art, and provides a self-balancing counter force loading device for a large test piece mechanical test, which is used for solving the problems that a self-balancing counter force system is high in occupied area cost, an outdoor test is easily influenced by geological conditions, a loading position is fixed, and universality is low.
The technical scheme adopted by the utility model is that the self-balancing counter force loading device for the mechanical test of the large test piece comprises: the reaction frame is of a frame structure and comprises an upper cross beam, reinforcing steel bars and a lower cross beam from top to bottom, wherein the two ends of the upper cross beam are provided with upper mounting pieces, the two ends of the corresponding lower cross beam are provided with lower mounting pieces, and the reinforcing steel bars penetrate through the upper mounting pieces and the lower mounting pieces at the same time; the upper longitudinal beams are orthogonally arranged below the upper cross beams, the upper cross beams comprise two upper cross beams which are orthogonally connected to two ends of the upper longitudinal beams to form an I-shaped structure, and the upper longitudinal beams can be automatically translated and adjusted in the length direction of the upper cross beams according to loading positions; the lower longitudinal beams are orthogonally arranged below the lower cross beams, each lower cross beam and each lower longitudinal beam comprise two lower cross beams, and the two lower cross beams are connected with the two lower longitudinal beams to form a cross structure; the distribution beam is used for transmitting stress to the upper longitudinal beam, the gravity center of the distribution beam is aligned with the gravity center of the upper longitudinal beam in the width direction of the upper longitudinal beam, and the distribution beam can be automatically translated and adjusted according to the loading position in the length direction of the upper longitudinal beam.
The loading device is beneficial to providing a three-dimensional loading counterforce system for loading a test piece through a counterforce frame formed by the upper cross beam and the lower cross beam, is beneficial to fixedly connecting the upper cross beam and the lower cross beam into a whole through reinforcing steel bars, an upper mounting piece and a lower mounting piece, is beneficial to balancing stress of the upper cross beam and the lower cross beam, is beneficial to providing reliable loading force for loading the test piece through an I-shaped structure formed by the upper longitudinal beam and a well-shaped structure formed by the lower longitudinal beam, is beneficial to realizing transformation of different loading points through the movement of a distribution beam, and therefore the universality of the loading device is enhanced.
Further, the upper mounting piece is coated on the upper and lower sides of the upper cross beam, and the lower mounting piece is coated on the upper and lower sides of the lower cross beam. The structure stability of the upper cross beam and the lower cross beam is enhanced by the cladding of the upper mounting piece and the lower mounting piece.
Further, the device comprises a loading device, wherein the loading device comprises a pressure sensor, a jack and a loading pad beam, the pressure sensor is propped against the bottom surface of the distribution beam through the jack below, and the jack transmits force to the surface of a test piece through the loading pad beam below. The device is favorable for loading through the jack, improves the convenience and efficiency of a loading test, is favorable for accurately controlling the loading force through the pressure sensor, and is favorable for realizing the reaction effect on the loading force of the jack through the loading pad beam.
Further, the loading point position of the loading device is movable and aligned with the center of gravity position of the distribution beam. The method is beneficial to realizing the transformation adjustment of different loading points in the test piece by simultaneously adjusting the gravity center positions of the distribution beam and the loading device, and increases the universality of the loading device.
Further, the test piece is characterized by further comprising lower beams, wherein the lower beams comprise four lower beams, and each lower beam is respectively provided with two lower beams for balancing the stress of the test piece. When the test piece is placed on the two lower cross beams, the balance of stress in the three-dimensional direction can be realized by the two lower cushion beams on each lower cross beam.
Further, the test piece comprises a temporary support, wherein the temporary support is arranged between the upper longitudinal beam and the test piece, and provides temporary support for the upper longitudinal beam before loading. The support of the upper longitudinal beam is realized through the temporary support, and when the jack has no loading force, the overall stability of the reaction frame can be ensured through the temporary support; after the jack starts to load, the temporary support is separated from contact with the upper longitudinal beam and does not participate in stress.
Further, the loading device further comprises a platform base plate, wherein the platform base plate is arranged between the side sill and the ground, provides a flat supporting surface for the whole loading device, and protects the original ground. The method is beneficial to avoiding direct contact between the lower longitudinal beam and the ground through the platform base plate so as to protect the original ground and provide a smooth supporting surface for the whole loading device.
Further, a gap is reserved between the distribution beam and the upper longitudinal beam before loading, and the distribution beam and the upper longitudinal beam are in close contact with each other to transfer force in the loading process. The free adjustment of loading points before loading is facilitated.
Further, the temporary support may be a steel truss or a wood block, lightweight. The method is beneficial to reducing the taking difficulty of manufacturing materials of the temporary support, locally obtaining materials and improving the universality of the temporary support on different construction sites.
Compared with the prior art, the utility model has the beneficial effects that: the prefabricated assembly of loading device is realized, the foundation is not required to be excavated on site, the loading device can be quickly built and put into use, the use convenience of the loading device is improved, the adjustment of loading points is realized by adjusting the positions of the upper longitudinal beam and the distribution beam, and the universality of the loading device is improved.
Drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is a side view structural diagram of the present utility model.
The drawings are marked with the following description: reaction frame 100, upper beam 110, lower beam 120, upper mounting 111, lower mounting 121, reinforcing steel 130, upper longitudinal beam 200, lower longitudinal beam 300, distribution beam 400, loading device 500, pressure sensor 510, jack 520, loading bolster 530, test piece 600, lower bolster 700, temporary support 800, and platform bolster 900.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the utility model. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Examples
As shown in fig. 1-2, the present embodiment provides a self-balancing reaction force loading device for a large-scale test piece mechanical test, which includes: the reaction frame 100 is in a frame structure, and comprises an upper beam 110, reinforcing steel bars 130 and a lower beam 120 from top to bottom, wherein the two ends of the upper beam 110 are provided with upper mounting pieces 111, the two ends of the lower beam 120 are provided with lower mounting pieces 121, and the reinforcing steel bars 130 penetrate into the upper mounting pieces 111 and the lower mounting pieces 121 at the same time; the upper longitudinal beams 200 are orthogonally arranged below the upper cross beams 110, the upper cross beams 110 comprise two upper cross beams 110, the two upper cross beams 110 are orthogonally connected to two ends of the upper longitudinal beams 200 to form an I-shaped structure, and the upper longitudinal beams 200 can be automatically translated and adjusted according to loading positions in the length direction of the upper cross beams 110; the lower longitudinal beams 300 are orthogonally arranged below the lower cross beams 120, the lower cross beams 120 and the lower longitudinal beams 300 respectively comprise two lower cross beams 120 and two lower cross beams 120 are connected with the two lower longitudinal beams 300 and form a well-shaped structure; the distribution beam 400 is used for transmitting force to the upper longitudinal beam 200, the gravity center of the distribution beam 400 is aligned with the gravity center of the upper longitudinal beam 200 in the width direction of the upper longitudinal beam 200, and the distribution beam 400 can be automatically and translationally adjusted according to the loading position in the length direction of the upper longitudinal beam 200.
In this embodiment, the test piece 600 is placed in the reaction frame 100, the distribution beam 400 transmits the loading force upward to the upper longitudinal beam 200, then transmits the force of the upper transverse beam 110 to the lower transverse beam 120 through the upper longitudinal beam 200, and then transmits the force of the upper transverse beam 110 to the lower transverse beam 120 through the reinforcing steel bar 130, and the lower transverse beam 120 is transmitted to the test piece 600 from bottom to top, so that a force balanced with the downward transmitted loading force is formed, and the loading of the test piece 600 is realized.
In this embodiment, the steel bar 130 is a finish-rolled screw steel bar, and the steel bar 130 is anchored to the upper and lower mounting members 111 and 121 by nuts. The upper longitudinal beams 200 are arranged below the two upper cross beams 110 in an orthogonal manner, one end of each upper longitudinal beam 200 is connected with one upper cross beam 110 in an orthogonal manner, and the other end of each upper longitudinal beam 200 is connected with the other upper cross beam 110 in an orthogonal manner, so that the upper longitudinal beams 200 and the two upper cross beams 110 form an I shape, force transmission and force distribution are facilitated, and the upper longitudinal beams 200 can be automatically and translationally adjusted in the length direction of the upper cross beams 110 according to loading positions and combined with translational adjustment of the distribution beams 400 to position the loading positions. The two side sills 300 are orthogonally disposed below the two bottom beams 120, so that the two side sills 300 and the two bottom beams 120 form a # -shape, which is convenient for force transmission and force distribution.
The upper mounting member 111 is coated on the upper and lower sides of the upper beam 110, and the lower mounting member 121 is coated on the upper and lower sides of the lower beam 120.
In this embodiment, there are eight upper mounting members 111, and one end of the upper beam 110 is sandwiched between two upper mounting members 111, and the other end is also sandwiched between two upper mounting members 111; there are eight lower mounting members 121, and one end of the lower beam 120 is clamped between the two lower mounting members 121, and the other end is also clamped between the two lower mounting members 121.
The device further comprises a loading device 500, wherein the loading device 500 comprises a pressure sensor 510, a jack 520 and a loading pad beam 530, the pressure sensor 510 is propped against the bottom surface of the distribution beam 400 through the jack 520 below, and the jack 520 transmits force to the surface of the test piece 600 through the loading pad beam 530 below.
In this embodiment, the jack 520 provides a loading force to the test piece 600, and when the jack 520 starts to load, the reading of the pressure sensor 510 starts to increase, and the loading force borne by the loading pad beam 530 also increases gradually, and the loading force borne by the test piece 600 also increases gradually.
The loading point position of the loading device 500 is movable and aligned with the center of gravity position of the distribution beam 400.
In this embodiment, the loading point of the loading device 500 may move along with the distribution beam 400, the loading point is not necessarily the center line of the test piece 600, but may be any position of the test piece 600, as long as the section center of the distribution beam 400 is aligned with the loading point of the loading device 500, and the center lines of the pressure sensor 510, the jack 520 and the loading pad 530 in the loading device 500 are always aligned, and the position of the loading pad 530 is the test loading point.
The lower bolster 700 is further included, and the lower bolster 700 includes four lower cross beams 120, two lower cross beams are respectively disposed on each lower cross beam 120, and are used for balancing the stress of the test piece 600.
In this embodiment, the test piece 600 is supported on the lower cross beam 120 through the lower bolster 700, the lower bolster 700 includes four, two lower bolster 700 are disposed on each lower cross beam 120, and the downward load force is transferred to the lower cross beam 120 through the two lower bolster 700 in an equalizing manner.
The test piece 600 further comprises a temporary support 800, wherein the temporary support 800 is arranged between the upper longitudinal beam 200 and the test piece 600, and provides temporary support for the upper longitudinal beam 200 before loading.
In this embodiment, when no loading force is applied, the temporary support 800 provides a temporary supporting force between the upper longitudinal beam 200 and the test piece 600 to ensure the overall stability of the reaction frame; after loading begins, the temporary support 800 is disengaged from the upper side member 200 and is not engaged in the force, and the temporary support 800 may be removed or replaced.
The loading device further comprises a platform pad 900, wherein the platform pad 900 is arranged between the side sill 300 and the ground, provides a flat supporting surface for the whole loading device, and protects the original ground.
In this embodiment, the platform plate 900 is disposed between the side sill 300 and the ground, and a temporary scaffold is set up on the platform plate 900 to ensure the stability of the upper beam 110 before the loading test.
A space is left between the distribution beam 400 and the upper longitudinal beam 200 before loading, and the distribution beam and the upper longitudinal beam are tightly contacted to transfer force during loading.
In this embodiment, the height of the temporary support 800 is set so that a small gap of about 2cm exists between the distribution beam 400 and the upper side member 200 before the loading test, and the gap between the upper side member 200 and the distribution beam 400 disappears after the loading test is started.
The temporary support 800 may be a steel truss or a wood block, lightweight.
In this embodiment, the shape of the material of the temporary support 800 may be changed according to local conditions in actual situations, and may be a light object such as a steel truss or a wood block, so as to reduce the influence of the dead weight of the temporary support 800 on the stress of the test piece 600 during loading, and if the condition is met, the material may be taken out when the loading test is started.
It should be understood that the foregoing examples of the present utility model are merely illustrative of the present utility model and are not intended to limit the present utility model to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present utility model should be included in the protection scope of the claims of the present utility model.
Claims (9)
1. A self-balancing counter-force loading device for large-scale test piece mechanical test, which is characterized by comprising:
the reaction frame is of a frame structure and comprises an upper cross beam, reinforcing steel bars and a lower cross beam from top to bottom, wherein the two ends of the upper cross beam are provided with upper mounting pieces, the two ends of the corresponding lower cross beam are provided with lower mounting pieces, and the reinforcing steel bars penetrate through the upper mounting pieces and the lower mounting pieces at the same time;
the upper longitudinal beams are orthogonally arranged below the upper cross beams, the upper cross beams comprise two upper cross beams which are orthogonally connected to two ends of the upper longitudinal beams to form an I-shaped structure, and the upper longitudinal beams can be automatically translated and adjusted in the length direction of the upper cross beams according to loading positions;
the lower longitudinal beams are orthogonally arranged below the lower cross beams, each lower cross beam and each lower longitudinal beam comprise two lower cross beams, and the two lower cross beams are connected with the two lower longitudinal beams to form a cross structure;
the distribution beam is used for transmitting stress to the upper longitudinal beam, the gravity center of the distribution beam is aligned with the gravity center of the upper longitudinal beam in the width direction of the upper longitudinal beam, and the distribution beam can be automatically translated and adjusted according to the loading position in the length direction of the upper longitudinal beam.
2. The self-balancing counter force loading device for mechanical testing of large test pieces according to claim 1, wherein the upper mounting piece is coated on the upper and lower sides of the upper cross beam, and the lower mounting piece is coated on the upper and lower sides of the lower cross beam.
3. The self-balancing counter-force loading device for mechanical test of large test piece according to claim 1, further comprising a loading device, wherein the loading device comprises a pressure sensor, a jack and a loading pad beam, the pressure sensor is propped against the bottom surface of the distribution beam through the jack below, and the jack transmits force to the surface of the test piece through the loading pad beam below.
4. A self-balancing counter force loading device for use in large test piece mechanics test according to claim 3, wherein the loading point position of the loading device is movable and aligned with the center of gravity position of the distribution beam.
5. The self-balancing counter force loading device for mechanical test of large test piece according to any one of claims 1-4, further comprising four lower beams, wherein two lower beams are respectively arranged on each lower beam and used for balancing the stress of the test piece.
6. A self-balancing counter force loading device for a mechanical test of a large test piece according to any one of claims 1 to 4, further comprising a temporary support provided between the upper longitudinal beam and the test piece for providing temporary support to the upper longitudinal beam prior to loading.
7. A self-balancing counter force loading device for mechanical testing of large test pieces according to any one of claims 1 to 4, further comprising a platform pad, said platform pad being located between said side sill and the ground, providing a flat support surface for the whole loading device while protecting the original ground.
8. A self-balancing counter force loading device for mechanical testing of large test pieces according to claim 7, wherein,
and a space is reserved between the distribution beam and the upper longitudinal beam before loading, and the distribution beam and the upper longitudinal beam are tightly contacted to transfer force in the loading process.
9. The self-balancing counter force loading device for mechanical testing of large test pieces according to claim 6, wherein the temporary support is a steel truss or a wood block or a light object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321568840.9U CN220399092U (en) | 2023-06-19 | 2023-06-19 | Self-balancing counter-force loading device for large test piece mechanical test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321568840.9U CN220399092U (en) | 2023-06-19 | 2023-06-19 | Self-balancing counter-force loading device for large test piece mechanical test |
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| Publication Number | Publication Date |
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| CN220399092U true CN220399092U (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321568840.9U Active CN220399092U (en) | 2023-06-19 | 2023-06-19 | Self-balancing counter-force loading device for large test piece mechanical test |
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| Country | Link |
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| CN (1) | CN220399092U (en) |
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2023
- 2023-06-19 CN CN202321568840.9U patent/CN220399092U/en active Active
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