Concrete beam loading test device and test method thereof

Abstract

The application provides a concrete beam loading test device and a test method thereof. The device comprises a first support body, a second support body, two loading assemblies and a second force applying assembly. The two loading assemblies further comprise a first stress rod, an elastic assembly, a first force applying assembly and a fixing assembly. In use, the first stress rod moves along the second direction under the drive of the first force applying assembly, the elastic assembly sleeved on the end of the first stress rod away from the first force applying assembly is compressed, the fixing assembly is locked, and stable load is provided to the first force applying assembly. The loading assembly does not need to be disassembled. The second force applying assembly can apply a force to the test beam, which can cause the test beam to be damaged. When the second force applying assembly applies pressure to the test beam, the test beam does not need to be unloaded, stable load is maintained, the real working condition of the test beam bending to damage can be simulated, and the requirements for the laboratory and the test site are not high.

Description

Technical Field

[0001] This application relates to the field of civil engineering technology, specifically to a concrete beam loading test device and its test method. Background Technology

[0002] Under long-term constant load, the strain of concrete beams increases continuously over time. This stress-induced deformation of concrete beams is called creep. Creep occurs in many real-world buildings with concrete beams. The resulting creep increases the deformation of concrete beams, causes stress redistribution, and affects structural safety. In real life, concrete beams that have already undergone creep will fail when subjected to stresses such as earthquakes. Therefore, it is very meaningful to study the long-term load deformation of concrete beams and to conduct experiments on them under sustained loads until failure.

[0003] Currently, there are only relevant test devices for short-term bending failure of concrete beams, and these need to be carried out under a press or reaction frame. Moreover, current tests on concrete beams after bending and creep are all conducted by unloading after creep and then transferring them to a press or reaction frame for loading until failure. This cannot maintain a constant load and cannot accurately simulate the real working conditions of concrete beams after bending failure. Furthermore, the reaction frame requires a special laboratory and has high requirements for the test site. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a concrete beam loading test device and test method thereof.

[0005] The first support body has two first supports distributed along a first direction, a first space between the two first supports, and a first reaction beam at the top of the first support body, the extension direction of the first reaction beam being the first direction.

[0006] The second support body is located on the side of the first reaction beam away from the first space. The second support body has two second supports distributed along the first direction. A second space is provided between the two second supports. A test beam is provided on the top of the second support body. The extension direction of the test beam is the first direction.

[0007] Two loading components are arranged along the first direction, and each loading component includes:

[0008] A first stress bar, which penetrates the test beam and the first reaction beam along a second direction, is fitted with an elastic component in the first space, and the second direction is perpendicular to the first direction;

[0009] A first force applying assembly is arranged at the end of the first stress rod away from the first space, and is used to drive the first stress rod to move in the second direction;

[0010] A fixing assembly is arranged on the test beam close to the side of the first force applying assembly, and is used to lock the first stress rod when the elastic assembly is in the force storage state.

[0011] The test device further comprises a second force applying assembly, which is used to apply a force to the test beam in the second direction close to the side of the second space.

[0012] According to the technical scheme provided in the embodiments of the present application, the elastic assembly is provided with a blocking piece away from the end of the first counterforce beam, the first stress rod penetrates through the blocking piece, the blocking piece is provided with a positioning piece away from the side of the elastic assembly, and the positioning piece is used to limit the blocking piece from sliding off the first stress rod; when the first stress rod moves in the second direction close to the side of the first force applying assembly, one end of the elastic assembly abuts against the first counterforce beam, and the other end abuts against the blocking piece.

[0013] According to the technical scheme provided in the embodiments of the present application, the loading assembly further comprises a third support body arranged on the test beam away from the side of the first counterforce beam, the third support body has two third supports arranged in the first direction, a third space is arranged between the two third supports, a support platform is arranged on the top of the third support body, the first stress rod penetrates through the support platform, and the first force applying assembly is arranged on the support platform.

[0014] According to the technical scheme provided in the embodiments of the present application, a first pressure detection assembly can be further arranged in the third space, and the first pressure detection assembly is arranged on the end of the test beam close to the fixing assembly.

[0015] According to the technical scheme provided in the embodiments of the present application, the first force applying assembly is provided with a second pressure detection assembly away from the end of the test beam.

[0016] According to the technical scheme provided in the embodiments of the present application, the second force applying assembly comprises:

[0017] A fourth support body is arranged on the test beam away from the side of the second space, the fourth support body is composed of two fourth supports arranged in the first direction, a fourth space is arranged between the two fourth supports, and a distribution beam is arranged on the top of the fourth support body.

[0018] A pressure piece is arranged on the side of the distribution beam away from the test beam, and is used to apply a force to the test beam in the second direction towards the side of the first counter-force beam;

[0019] A limiting assembly is arranged on the side of the pressure piece away from the distribution beam, and is used to limit the movement of the pressure piece in the second direction away from the side of the distribution beam.

[0020] According to the technical scheme provided by the embodiment of the present application, the limiting assembly comprises:

[0021] A second counter-force beam is arranged on the top of the pressure piece away from the distribution beam, and the extension direction of the second counter-force beam is the first direction;

[0022] Two locking assemblies are arranged in the first direction, and each locking assembly comprises:

[0023] A second stress rod is connected to the second counter-force beam, the test beam and the first counter-force beam in the second direction;

[0024] A first fixing piece is sleeved on the second stress rod arranged in the first space;

[0025] A second fixing piece is sleeved on the second stress rod arranged on the side of the second counter-force beam away from the distribution beam, and the second fixing piece cooperates with the first fixing piece to lock the second stress rod.

[0026] According to the technical scheme provided by the embodiment of the present application, a third pressure detection assembly is arranged on the top of the pressure piece, and is used to obtain the size of the force applied by the pressure piece to the test beam.

[0027] According to the technical scheme provided by the embodiment of the present application, a bending measurement assembly is further arranged, and is used to obtain the bending degree of the test beam.

[0028] The second aspect of the present application provides a test method of the concrete beam loading test device, comprising the following steps:

[0029] Assembling the test device;

[0030] Setting a first preset force sequence, the first preset force sequence comprising a plurality of first preset forces increasing in sequence, the first preset force being the force applied by the first force applying assembly to the test beam;

[0031] A second preset force sequence is set, the second preset force sequence including a plurality of second preset forces which are increasing, the second preset force being an action force applied to the test beam by the second force applying component;

[0032] An action force is applied to the test beam according to the first preset force sequence until the last first preset force is applied;

[0033] The test device is rested for the preset time, and the deformation of the test beam in the creep process is obtained by the bending measurement component;

[0034] An action force is applied to the test beam according to the second preset force sequence until the test beam is destroyed, and the second preset force at this time is obtained;

[0035] The bending degree of the test beam at the time of destruction is obtained by the bending measurement component.

[0036] In summary, the application provides a concrete beam loading test device and a test method thereof.

[0037] The technical solution is provided with a first support body, a first counterforce beam on the first support body, a second support body on the first counterforce beam, a test beam on the second support body, a second space in the second support body, a space for the creep of the test beam, two loading components on the test beam, two first stress rods extending along the second direction, an elastic component at one end of the first stress rod, a first force applying component at the end away from the elastic component and capable of driving the first stress rod to move along the second direction, and a fixing component for fixing the first stress rod, a second force applying component, the second force applying component being capable of applying a force to the test beam to realize the destruction of the test beam, the loading component applying pressure, the first stress rod being fixed by the fixing component, and the elastic component providing stable load during the test, the second force applying component applying pressure to the test beam without unloading the test beam, maintaining stable load, simulating the real working condition of the test beam bending to destruction, and not being high in requirement for the laboratory and the test site. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A structural schematic diagram of a concrete beam loading test device provided by the application embodiment is provided;

[0039] Figure 2 A flowchart of a test method of a concrete beam loading test device provided by the application embodiment is provided.

[0040] The text annotations in the drawings represent:

[0041] 1, first support body; 10, first support; 11, first counter-force beam; 2, second support body; 20, second support; 21, test beam; 3, loading assembly; 30, first stress rod; 31, elastic assembly; 32, first force applying assembly; 33, fixing assembly; 34, third support body; 341, third support; 342, support platform; 35, blocking piece; 36, positioning piece; 4, second force applying assembly; 41, fourth support body; 411, fourth support; 412, distribution beam; 42, pressure piece; 43, limiting assembly; 430, second counter-force beam; 431, locking assembly; 432, second stress rod; 433, first fixing piece; 434, second fixing piece; 5, first pressure detection assembly; 6, second pressure detection assembly; 7, third pressure detection assembly. DETAILED DESCRIPTION

[0042] The application will be further described below in detail with reference to the drawings and examples. It can be understood that the specific examples described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0043] It should be noted that the examples in the present application and the features in the examples can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and examples.

[0044] Example 1

[0045] As mentioned in the background, in order to solve the problems in the prior art, the present application provides a concrete beam loading device, as shown in Figure 1 The device comprises:

[0046] A first support body 1, the first support body 1 has two first supports 10 distributed in a first direction, a first space is arranged between the two first supports 10, and a first counter-force beam 11 is arranged on the top of the first support body 1, wherein the extension direction of the first counter-force beam 11 is the first direction; optionally, the first support 10 is a rectangular support, which has a flat surface with sufficient stability and load capacity for placing the first counter-force beam 11, the first counter-force beam 11 is a long strip-shaped beam, the first direction is parallel to the long side of the first counter-force beam 11, and the first counter-force beam 11 is arranged on the top of the first support body 1 to form a stable flat surface for subsequent tests;

[0047] A second support body 2 is arranged on the first counter-force beam 11 away from the first space, the second support body 2 has two second supports 20 arranged along the first direction, a second space is arranged between the two second supports 20, a test beam 21 is arranged on the top of the second support body 2, the extending direction of the test beam 21 is the first direction; optionally, the second direction is the vertical direction, the second support 20 is a support arranged along the vertical direction by a cushion block and a hinge support, which is arranged on the first counter-force beam 11 to provide a plane for placing the test beam 21, a second space is formed in the second support 20 to leave a deformable space for the test beam 21 during the experiment, so as to ensure the accuracy of the test result, the distance between the two second supports 20 in the first direction should be substantially equal to the length of the test beam 21, optionally, the length of the test beam 21 is 2 meters, which is a concrete beam, the two supporting points of the test beam 21 by the second support 20 should be at the two ends of the test beam 21, close to the side of the test beam 21 close to the second space;

[0048] Two loading assemblies 3 are arranged along the first direction, wherein a certain distance is left between the two loading assemblies 3 in the first direction to ensure that a pure bending section is formed on the loading beam during loading, optionally, the distance between the two loading assemblies 3 is 1.2 meters, each loading assembly 3 comprises:

[0049] A first stress rod 30 penetrates the test beam 21 and the first counter-force beam 11 along the second direction, the first stress rod 30 arranged in the first space is sleeved with an elastic assembly 31, and the second direction is perpendicular to the first direction; optionally, the first stress rod 30 is made of a steel bar with small elasticity, the first stress rod 30 penetrates the test beam 21 and the first counter-force beam 11, hoop reinforcement is arranged at the penetrating hole to reduce the deformation of the penetrating hole on the test beam 21, the first stress rod 30 can move along the vertical direction in the test beam 21 and the first counter-force beam 11, the vertical length of the part of the first stress rod 30 in the first space is less than the height of the first support 10, and the elastic assembly 31 is a spring sleeved outside the first stress rod 30;

[0050] A first force applying assembly 32 is arranged at the end of the first stress rod 30 away from the first space, and is used to drive the first stress rod 30 to move in the second direction; optionally, the first force applying assembly 32 is selected as two same type of through jacks, the first stress rod 30 passes through the through jacks, and the through jacks can drive the first stress rod 30 to move upward in the vertical direction during the working process, at this time, the elastic assembly 31 is in the force storage state, the first stress rod 30 always moves in the vertical direction, and the through holes on the first counter-force beam 11, the test beam 21 and the first force applying assembly 32 for the first stress rod 30 to pass through should always be on a vertical line;

[0051] A fixing assembly 33 is arranged on the test beam 21 close to the side of the first force applying assembly 32, and is used to drive the first stress rod 30 to move in the second direction close to the first force applying assembly 32 when the first force applying assembly 32 drives the first stress rod 30 to move in the second direction, and lock the first stress rod 30 when the elastic assembly 31 is in the force storage state; wherein the fixing assembly 33 is selected as a lockable anchor device, the first stress rod 30 passes through the fixing assembly 33, one end of the first stress rod 30 abuts against the test beam 21, and the other end of the first stress rod 30 abuts against the bottom surface of the first force applying assembly 32, the first stress rod 30 can move in the vertical direction in the fixing assembly 33, when the force applying assembly reaches the required load for the test, the fixing assembly 33 is locked, the elastic assembly 31 is compressed, the fixing assembly 33 blocks the stress rod from moving in the vertical direction, the constant load is achieved through the elastic assembly 31, the top end of the elastic assembly 31 abuts against the first counter-force beam 11, the force of the elastic assembly 31 in the vertical direction upward is provided on the first counter-force beam 11, and only the force in the vertical direction downward on the test beam 21 is provided by the fixing assembly 33, and since the elastic assembly 31 can achieve the long-term constant load of the test beam 21, the test of the test beam 21 under the long-term load can be achieved.

[0052] The test device further comprises a second force applying assembly 4, which is used to apply the force in the second direction close to the side of the second space to the test beam 21; wherein the second force applying assembly 4 can provide the force to destroy the test beam 21 after the test beam 21 is in the creep state, the test beam 21 does not need to be unloaded when the second force applying assembly 4 applies the pressure to the test beam 21, the stable load can be maintained, the real working condition of the test beam 21 under the bending to destruction can be simulated, and the requirements for the laboratory and the test site are not high.

[0053] Further, the elastic assembly 31 is provided with a blocking piece 35 away from the first counter-force beam 11 end, the first stress rod 30 penetrates the blocking piece 35, the blocking piece 35 is provided with a positioning piece 36 away from the spring assembly side, the positioning piece 36 is used to limit the blocking piece 35 from sliding off the first stress rod 30; when the first stress rod 30 moves along the second direction to the side close to the first force applying assembly 32, one end of the elastic assembly 31 abuts against the first counter-force beam 11, and the other end abuts against the blocking piece 35. Optionally, the elastic assembly 31 selects a spring, the spring is sleeved on the outside of the first stress rod 30 and extends in the vertical direction, the blocking piece 35 is selected as a disc shape with a diameter slightly larger than the diameter of the spring, the blocking piece 35 is sleeved on the first stress rod 30 and is used to block the elastic assembly 31 from sliding off the stress rod, the blocking piece 35 is provided with a positioning piece 36 away from the elastic assembly 31 side, the positioning piece 36 is selected as an anchor and is arranged at the end of the blocking piece 35 away from the elastic assembly 31, the positioning piece 36 is used to fix the blocking piece 35 and limit the blocking piece 35 and the elastic assembly 31, when the first stress rod 30 moves downward in the vertical direction, the elastic assembly 31 is compressed, one end abuts against the first counter-force beam 11 away from the second space side, and the other end abuts against the blocking piece 35, the length of the elastic assembly 31 is shortened, and the blocking piece 35 and the positioning piece 36 move along with the first stress rod 30 in the vertical direction to provide support for the elastic assembly 31.

[0054] Further, the loading assembly 3 further comprises a third support body 34 arranged on the test beam 21 away from the first counter-force beam 11 side, the third support body 34 has two third supports 341 arranged in the first direction, a third space is arranged between the two third supports 341, a support platform 342 is arranged on the top of the third support 341, the first stress rod 30 penetrates the support platform 342, and the first force applying assembly 32 is arranged on the support platform 342. Optionally, the third support body 34 is arranged on the test beam 21 away from the second space side, two third support bodies 34 are arranged, and the two third support bodies 34 are respectively provided with third supports 341 arranged in the first direction, the third support 341 is selected as a rectangular support, because the plane on the fixing assembly 33 cannot stably apply force to the first force applying assembly 32, a horizontal support platform 342 is arranged on the top of the third support 341, the area of the support platform 342 is greater than the bottom area of the first force applying assembly 32, and the purpose of the support platform 342 is to enable the first force applying assembly 32 to stably apply force in the vertical direction during the force applying process.

[0055] Further, the third space can be provided with a first pressure detection component 5, which is arranged near the end of the test beam 21 relative to the fixing component 33. Optionally, the first pressure detection component 5 is a pressure sensor, which is arranged at the connection between the fixing component 33 and the test beam 21, and is used to measure the force applied to the test beam 21 by the fixing component.

[0056] Further, the first force applying component 32 is provided with a second pressure detection component 6 at the end away from the test beam 21. Optionally, the second pressure detection component 6 is a pressure sensor, which is arranged on the top of the first force applying component 32, and is used to measure the force applied by the first force applying component 32 during the force applying process.

[0057] Further, the second force applying component 4 comprises:

[0058] A fourth support body 41 is arranged at the end of the test beam 21 away from the second space, which is composed of two fourth supports 411 arranged along the first direction, and a fourth space is arranged between the two fourth supports 411. A distribution beam 412 is arranged on the top of the fourth support body 41. Optionally, the two fourth supports 411 are hinged supports, which have the same height, and the distance between the two fourth supports 411 along the first direction is slightly less than 1.2 meters. The distribution beam 412 is arranged on the top of the fourth support 411, and a fourth space is arranged between the two fourth supports 411, which is used to provide a margin for the possible deformation of the distribution beam 412.

[0059] A pressure component 42 is arranged at the end of the distribution beam 412 away from the test beam 21, which is used to apply a force along the second direction to the side close to the first counter-force beam 11. Optionally, the pressure component 42 is a jack, which is arranged vertically, and can provide a force along the vertical direction, which is then applied to the test beam 21 through the distribution beam 412, so as to ensure that the pure bending section of the test beam 21 is unchanged.

[0060] A limiting component 43 is arranged at the end of the pressure component 42 away from the distribution beam 412, which is used to limit the movement of the pressure component 42 along the second direction away from the distribution beam 412. The limiting component is arranged at the end of the jack away from the test beam 21, which limits the upward movement of the jack along the vertical direction, so as to ensure that the jack can provide a stable force along the vertical direction downward to the distribution beam 412.

[0061] Further, the limiting assembly 43 comprises:

[0062] a second counter-force beam 430, which is arranged at the top of the pressure member 42 away from the distribution beam 412, and extends in the first direction; optionally, the second counter-force beam 430 is a counter-force frame, which extends in the first direction, and the length in the first direction is greater than the length of the test beam 21, and the length of the counter-force frame in the first direction is greater than 2 meters;

[0063] two locking assemblies 431, which are arranged along the first direction, and each locking assembly 431 comprises:

[0064] a second stress rod 432, which connects the second counter-force beam 430, the test beam 21 and the first counter-force beam 11 along the second direction; wherein the second stress rod 432 is a threaded steel bar, which extends in the vertical direction;

[0065] a first fixing member 433, which is arranged outside the second stress rod 432 in the first space; optionally, the first fixing member 433 comprises two rectangular cross beams, which extend in the third direction, the third direction is perpendicular to the first direction and the second direction, and is parallel to the short side of the first counter-force beam 11, and the two ends of the first fixing member 433 further comprise two first locking anchors, which are located at the end of the first fixing member 433 away from the first counter-force beam 11, the second stress rod 432 passes through the first fixing member 433 and the first locking anchor, and is locked by the first locking anchor;

[0066] A second fixing member 434 is arranged outside the second stress rod 432 on the side of the second counter-force beam 430 away from the distribution beam 412. The second fixing member 434 cooperates with the first fixing member 433 to lock the second stress rod 432. Optionally, the second fixing member 434 also comprises two rectangular cross beams extending in the third direction. The second fixing member 434 is located on the side of the second counter-force beam 430 away from the pressure member 42. The second fixing member 434 also comprises two second locking anchors at its two ends. The second locking anchors are located on the side of the second fixing member 434 away from the second counter-force beam 430. The second stress rod 432 passes through the second fixing member 434 and the second locking anchors and is locked by the second fixing member 434. The second fixing member 434 cooperates with the first fixing member 433. The first fixing member 433 and the second fixing member 434 pass through the first stress rod 431 and the second stress rod 432 respectively. There are four second stress rods 432 in total. The four second stress rods 432 are locked by the first locking anchors and the second locking anchors and cannot move in the vertical direction.

[0067] Further, the pressure member 42 is provided with a third pressure detection assembly 7 for obtaining the force applied by the pressure member 42 to the test beam 21. Optionally, the third pressure detection assembly is a pressure sensor. The third pressure detection assembly can measure the pressure applied by the pressure member 42 to the distribution beam 412.

[0068] Further, a bending measurement assembly is also provided for obtaining the bending degree of the test beam 21. Optionally, the bending measurement assembly is arranged on the pure bending section of the test beam 21. The bending measurement assembly can measure the creep of the pure bending section of the test beam 21 under continuous load.

[0069] Embodiment 2

[0070] The present application provides a test method for the concrete beam loading test device as described above, as shown in Figure 2 The test method comprises the following steps:

[0071] S100 assembling the test device; wherein the first support body 1, the second support body 2, the two loading assemblies 3 and the second force applying assembly 4, and the first pressure detection assembly 5, the second pressure detection assembly 6 and the third pressure detection assembly 7 are assembled.

[0072] S200 sets a first preset force sequence, the first preset force sequence includes a plurality of increasing first preset forces, the first preset force is the force applied by the first force applying component 32 to the test beam 21; wherein the last first preset force is known, the last first preset force is the force finally applied to the test beam to cause its creep, the first preset force is gradually increased during the force applying process, and the last first preset force should be less than the limit force at which the test beam 21 is damaged, and the first preset force is measured by the first pressure measuring component.

[0073] S300 sets a second preset force sequence, the second preset force sequence includes a plurality of increasing second preset forces, the second preset force is the force applied by the second force applying component 4 to the test beam 21; wherein the second preset is also a continuously increasing applying process, the test beam 21 is damaged in the process of gradually increasing the second preset force, at this time the second preset force sequence includes the limit force that can make the test beam 21 be damaged, in the process of gradually increasing the second preset force, the maximum second preset force applied is unknown, so the last second preset force in the second preset force sequence should be greater than the limit force at which the test beam 21 is predicted to be damaged, to ensure that the test beam 21 can be damaged in the process of applying the second prediction force sequence, and the second preset force is measured by the third pressure measuring component;

[0074] S400 applies force to the test beam 21 according to the first preset force sequence until the last first preset force is applied; wherein the first preset force sequence is applied to the test beam 21 by two loading components 3, the applying direction of the second preset force sequence is the vertical direction, and the first force applying component 32 in the two loading components 3 drives the first stress rod 30 to move away from the elastic component 31 along the second direction, at this time with the continuous increase of the first preset force, the elastic component 31 is continuously compressed and is in a force storage state, when the first preset force sequence is applied, the fixing component 33 is locked, at this time the first force applying component 32 can stop working, and the test beam 21 realizes constant load by using the elastic component 31;

[0075] S500 rests the test device for a preset time, and obtains the deformation of the test beam 21 in the creep process by the bending measuring component; wherein the test beam 21 realizes constant load by the elastic component 31, and the creep of the test beam 21 under stress in reality can be simulated by long-time static state, and then the creep is measured by the bending measuring component;

[0076] S600 applies the force to the test beam 21 according to the second preset force sequence until the test beam 21 is destroyed, and obtains the second preset force at this time; wherein the second force applying assembly is installed by S100, but the second force applying assembly does not apply force, at this time, the second preset force sequence is applied, the second preset force is applied to the test beam 21 until the test beam 21 is destroyed, the second force applying assembly 4 is applied, the pressure piece 42 works, the second preset force is applied to the distribution beam 412 in the vertical direction, the limiting assembly 43 limits the movement of the pressure piece 42 in the vertical direction, the second preset force is applied to the test beam 21 through the distribution beam 412, through the second preset force increasing continuously until the test beam 21 is destroyed, the third measuring assembly obtains the second preset force at this time;

[0077] S700 obtains the bending degree of the test beam 21 when the test beam 21 is destroyed through the bending measuring assembly, wherein the test beam 21 is finally destroyed in the process of continuously applying the second sequence force, the deformation and the bending degree of the test beam 21 in the process of being stressed and when being destroyed are tested through the bending measuring assembly.

[0078] The principles and implementation manners of the present application are described by specific examples in the present application, and the above examples are only used to help understand the method and its core idea. The above description is only the preferred embodiment of the present application, it should be pointed out that due to the limitation of language expression, there are infinite specific structures, for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements, refinements or changes can be made, and the above technical features can be combined in an appropriate way; these improvements, refinements, changes or combinations, or without improvement, directly apply the concept and technical scheme of the present application to other occasions, should be regarded as the protection scope of the present application.

Claims

1. A concrete beam loading test apparatus, characterized by, The utility model relates to a test device for testing the bearing capacity of a bridge, which comprises: a first support body (1) having two first supports (10) arranged along a first direction, a first space being arranged between the two first supports (10), and a first counter-force beam (11) being arranged on the top of the first support body (1) and extending along the first direction; a second support body (2) arranged on the side of the first counter-force beam (11) away from the first space, the second support body (2) having two second supports (20) arranged along the first direction, a second space being arranged between the two second supports (20), and a test beam (21) being arranged on the top of the second support body (2) and extending along the first direction; two loading assemblies (3) arranged along the first direction, each loading assembly (3) comprising: a first stress rod (30) penetrating through the test beam (21) and the first counter-force beam (11) along a second direction, the first stress rod (30) in the first space being sleeved with an elastic assembly (31), and the second direction being perpendicular to the first direction; a first force applying assembly (32) arranged at the end of the first stress rod (30) away from the first space, the first force applying assembly (32) being used to drive the first stress rod (30) to move along the second direction; a fixing assembly (33) arranged on the test beam (21) close to the first force applying assembly (32), the fixing assembly (33) being used to drive the first stress rod (30) to move along the second direction towards the first force applying assembly (32) and lock the first stress rod (30) when the elastic assembly (31) is in a force storage state; the test device further comprises a second force applying assembly (4) used to apply a force to the test beam (21) along the second direction towards the second space.

2. The concrete beam loading test apparatus of claim 1, wherein: the elastic assembly (31) is provided with a blocking piece (35) away from the end of the first counter-force beam (11), the first stress rod (30) penetrates through the blocking piece (35), the blocking piece (35) is provided with a positioning piece (36) away from the elastic assembly (31), the positioning piece (36) is used to limit the blocking piece (35) from sliding off the first stress rod (30), and when the first stress rod (30) moves along the second direction towards the first force applying assembly (32), one end of the elastic assembly (31) abuts against the first counter-force beam (11) and the other end abuts against the blocking piece (35).

3. The concrete beam loading test apparatus of claim 1, wherein: The loading assembly (3) further comprises a third support body (34) arranged on the test beam (21) away from the first counter-force beam (11), the third support body (34) has two third supports (341) arranged along the first direction, a third space is arranged between the two third supports (341), a support platform (342) is arranged on the top of the third support (341), the first stress rod (30) penetrates through the support platform (342), and the first stress rod (30) is provided with the first force applying assembly (32).

4. The concrete beam loading test apparatus of claim 3, wherein: The third space is further provided with a first pressure detection assembly (5), and the first pressure detection assembly (5) is arranged on the fixed assembly (33) close to the test beam (21).

5. The apparatus of claim 1, wherein: The first force applying assembly (32) is provided with a second pressure detection assembly (6) away from the test beam (21).

6. The concrete beam loading test apparatus of claim 1, wherein: The second force applying assembly (4) comprises: A fourth support body (41) is arranged on the test beam (21) away from the second space, the fourth support body (41) is composed of two fourth supports (411) arranged along the first direction, a fourth space is arranged between the fourth supports (411), and a distribution beam (412) is arranged on the top of the fourth support body (41); A pressure piece (42) is arranged on the distribution beam (412) away from the test beam (21), and the pressure piece (42) is used for applying a force along the second direction to the test beam (21) close to the first counter-force beam (11); A limiting assembly (43) is arranged on the pressure piece (42) away from the distribution beam (412), and the limiting assembly (43) is used for limiting the movement of the pressure piece (42) along the second direction away from the distribution beam (412).

7. The concrete beam loading test apparatus of claim 6, wherein: The limiting assembly (43) comprises: A second counter-force beam (430) is arranged on the top of the pressure piece (42) away from the distribution beam (412), and the extension direction of the second counter-force beam (430) is the first direction; Two locking assemblies (431) are arranged along the first direction, and each locking assembly (431) comprises: A second stress rod (432) connects the second counter-force beam (430), the test beam (21) and the first counter-force beam (11) along the second direction; A first fixing piece (433) is arranged outside the second stress rod (432) arranged in the first space; A second fixing piece (434) is arranged outside the second stress rod (432) arranged on the side of the second counter-force beam (430) away from the distribution beam (412), and the second fixing piece (434) and the first fixing piece (433) are matched to lock the second stress rod (432).

8. The concrete beam loading test apparatus of claim 6, wherein: The pressure piece (42) is provided with a third pressure detection assembly (7) at the top, which is used to obtain the force applied by the pressure piece (42) to the test beam (21).

9. The concrete beam loading test apparatus of claim 1, wherein: Further comprising a bending measurement assembly, which is used to obtain the bending degree of the test beam (21).

10. A test method for the loading test apparatus for a concrete beam according to any one of claims 1 to 9, characterized by, The method comprises the following steps: Assembling the test device; Setting a first preset force sequence, which comprises a plurality of first preset forces in ascending order, the first preset force being the force applied by the first force applying assembly (32) to the test beam (21); Setting a second preset force sequence, which comprises a plurality of second preset forces in ascending order, the second preset force being the force applied by the second force applying assembly (4) to the test beam (21); Applying force to the test beam (21) according to the first preset force sequence until the last first preset force is applied; Letting the test device stand for a preset time, and obtaining the deformation of the test beam (21) during the creep process through the bending measurement assembly; Applying force to the test beam (21) according to the second preset force sequence until the test beam (21) is destroyed, and obtaining the second preset force at this time; Obtaining the bending degree of the test beam (21) when it is destroyed through the bending measurement assembly.

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