A concrete shearing force testing device and a testing method thereof

Abstract

The application provides a concrete shearing force testing device, which comprises a base and a concrete lower testing frame, a concrete upper testing frame, a fixing block, a hydraulic power cabinet and a controller arranged on the base; the fixing block and the hydraulic power cabinet are arranged at the left and right ends of the base respectively, the concrete lower testing frame is arranged at the right end of the fixing block, the concrete upper testing frame is arranged at the upper end of the concrete lower testing frame, and the controller is electrically connected with the hydraulic power cabinet; a hydraulic cylinder is connected to the left side of the hydraulic power cabinet, a propelling head is inserted into the left end of the hydraulic cylinder through a propelling rod, the left side of the propelling head is close to the concrete upper testing frame, and the left end of the hydraulic cylinder is opposite to the concrete upper testing frame. The application also provides a concrete shearing force testing method. The principle of the elastic trigger is adopted, when the concrete is fractured due to the shearing force, the elastic trigger is actuated, the hydraulic power cabinet is stopped, then the maximum loading force before the stoppage is obtained according to the controller, and the calculation of the concrete shearing force is further performed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-end equipment manufacturing, and in particular to a concrete shear force testing device and a testing method thereof. BACKGROUND

[0002] Concrete is a civil engineering material. Generally, concrete uses cement as a cementitious material, uses sand and stone as aggregate, and is mixed with water in a certain proportion to obtain cement concrete after stirring.

[0003] At present, when cement concrete materials are applied to buildings, structural strength testing is generally required, and in this testing process, the shear force detection of the concrete block is crucial. However, the existing concrete block shear force detection method has a large error, which is not conducive to accurate shear force testing. Therefore, it is urgent to design a concrete shear force testing device and a testing method thereof that can accurately test the shear force of the concrete block. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a concrete shear force testing device and a testing method thereof that can accurately test the shear force of the concrete block.

[0005] The present application solves the above technical problems by adopting the following technical solutions:

[0006] A concrete shear force testing device comprises a base and a concrete lower testing frame, a concrete upper testing frame, a fixed block, a hydraulic power cabinet and a controller arranged on the base. The fixed block and the hydraulic power cabinet are arranged at the left and right ends of the base, respectively. The concrete lower testing frame is arranged at the right end of the fixed block. The concrete upper testing frame is arranged at the upper end of the concrete lower testing frame. The controller is electrically connected with the hydraulic power cabinet.

[0007] The left side of the hydraulic power cabinet is connected with a hydraulic cylinder. The left end of the hydraulic cylinder is inserted with a propelling head through a propelling rod. The propelling head is in close contact with the concrete upper testing frame on the left side. A spring is further sleeved on the propelling rod between the propelling head and the hydraulic cylinder. Electrode A and electrode B are arranged on the opposite end walls between the propelling head and the hydraulic cylinder, respectively. Electrode A and electrode B are electrically connected with the controller, respectively.

[0008] As one of the preferred modes of the present application, the left and right ends of the spring are connected with the right end of the propelling head and the left end of the hydraulic cylinder, respectively.

[0009] As one of the preferred modes of the present application, an insulating block A is arranged on the right end wall of the propelling head, and the electrode A is arranged on the insulating block A. An insulating block B is arranged on the left end wall of the hydraulic cylinder, and the electrode B is arranged on the insulating block B.

[0010] As one of the preferred modes of the present application, when the left end wall of the hydraulic cylinder is close to the right end wall of the push head, the electrode A and the electrode B are electrically connected and a signal is transmitted to the controller.

[0011] As one of the preferred modes of the present application, the upper end of the fixing block is further connected with a protective cover.

[0012] As one of the preferred modes of the present application, the concrete shear force testing device further comprises a hydraulic adjusting cabinet; the hydraulic adjusting cabinet is arranged on the base and is electrically connected with the controller; meanwhile, the left end of the hydraulic cylinder is provided with a mounting cavity, and the push rod is mounted in the mounting cavity, and the right end of the mounting cavity is in communication with the hydraulic adjusting cabinet through the liquid inlet pipe and the liquid outlet pipe.

[0013] A concrete shear force testing method, which adopts the above-mentioned concrete shear force testing device and comprises the following specific steps:

[0014] Step one: placing the concrete block in the concrete lower testing frame and the concrete upper testing frame;

[0015] Step two: starting the hydraulic power cabinet through the controller and applying a loading force to the right side of the concrete upper testing frame through the hydraulic cylinder;

[0016] Step three: after the loading force is applied, the spring is compressed, the right end of the push head is close to the left end of the hydraulic cylinder, the electrode A is in contact with the electrode B and forms a loop with the controller; the controller continuously increases the loading force;

[0017] Step four: when the loading force continuously increases to the breaking of the concrete block, the spring returns to the initial state, the right end of the push head is away from the left end of the hydraulic cylinder, the electrode A is separated from the electrode B, the loop of the electrode A, the electrode B and the controller is broken, and the controller sends a stop signal to the hydraulic power cabinet;

[0018] Step five: recording the maximum loading force before the hydraulic power cabinet stops, and calculating the maximum shear force of the concrete block through the maximum loading force at the time of stopping.

[0019] As one of the preferred modes of the present application, when the concrete shear force testing device comprises a hydraulic adjusting cabinet, the following step is further included between step one and step two: adjusting the amount of hydraulic oil in the mounting cavity through the hydraulic adjusting cabinet controlled by the controller, so as to control the extension amount of the push rod in the mounting cavity and further control the pre-tightening force of the spring.

[0020] As one of the preferred modes of the present application, the height of the concrete block is equal to the height of the concrete lower testing frame plus the height of the concrete upper testing frame.

[0021] The application has the advantages that: the application adopts the elastic trigger principle; when the hydraulic cylinder continuously applies loading force to the concrete and the test frame and the concrete in the test frame through the pushing head and reaches a certain degree, the concrete block is broken due to the shear force, at this time, the elastic trigger (which is composed of a spring, an electrode A, an electrode B and the like) acts, the hydraulic power cabinet is stopped through the controller, then the maximum loading force before stopping is obtained according to the controller, and the calculation of the shear force of the concrete is further performed; the device and the method are used for testing the shear force of the concrete, and the shear force of the concrete to be tested can be measured quickly and accurately with small error. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the concrete shear force testing device in the embodiment one of the application.

[0024] Figure 2 It is an enlarged view of the A part in the Figure 1

[0025] Figure 3 It is a circuit connection diagram of the electrode A, the electrode B and the controller in the embodiment one of the application.

[0026] Figure 4 It is a schematic diagram of the overall structure of the concrete shear force testing device in the embodiment two of the application.

[0027] Figure 5 It is a schematic diagram of the hydraulic adjusting structure in the embodiment two of the application.

[0028] Figure 6 It is an enlarged view of the B part in the Figure 5

[0029] In the drawings, the components represented by the respective reference numerals are as follows:

[0030] 1, base; 2, lower concrete test frame; 3, upper concrete test frame; 4, fixed block; 5, protective cover; 6, hydraulic power cabinet; 7, controller; 8, hydraulic cylinder; 81, mounting cavity; 9, pushing rod; 10, pushing head; 11, spring; 12, insulating block A; 13, insulating block B; 14, electrode A; 15, electrode B; 16, hydraulic adjusting cabinet; 161, liquid inlet pipe; 162, liquid outlet pipe. DETAILED DESCRIPTION ​​

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Embodiment one:

[0033] Please refer to Figures 1-3 The concrete shear force testing device in the embodiment comprises a base 1, a concrete lower testing frame 2, a concrete upper testing frame 3, a fixing block 4, a hydraulic power cabinet 6 and a controller 7 which are arranged on the base 1. The fixing block 4 and the hydraulic power cabinet 6 are arranged at the left and right ends of the base 1 respectively, the concrete lower testing frame 2 is arranged at the right end of the fixing block 4, the concrete upper testing frame 3 is arranged at the upper end of the concrete lower testing frame 2, and the controller 7 is arranged at the upper end of the hydraulic power cabinet 6 and electrically connected with the hydraulic power cabinet 6.

[0034] Specifically, the left side of the hydraulic power cabinet 6 is connected with a hydraulic cylinder 8, the left end of the hydraulic cylinder 8 is inserted with a pushing head 10 through a pushing rod 9, and the left side of the pushing head 10 is close to the concrete upper testing frame 3. The pushing rod 9 between the pushing head 10 and the hydraulic cylinder 8 is further sleeved with a spring 11, and the left and right ends of the spring 11 are connected with the right end of the pushing head 10 and the left end of the hydraulic cylinder 8 respectively. Meanwhile, an insulating block A 12 is arranged on the right end wall of the pushing head 10, and an electrode A 14 is arranged on the insulating block A 12; an insulating block B 13 is arranged on the left end wall of the hydraulic cylinder 8, and an electrode B 15 is arranged on the insulating block B 13; the electrode A 14 and the electrode B 15 are electrically connected with the controller 7 respectively, and when the left end wall of the hydraulic cylinder 8 is close to the right end wall of the pushing head 10, the electrode A 14 and the electrode B 15 are electrically connected and transmit signals to the controller.

[0035] Further, in the embodiment, in order to prevent the broken concrete block from being bounced and injuring the staff during the detection process, the upper end of the fixing block 4 is further connected with a protective cover 5.

[0036] The concrete shear force testing method based on the above device:

[0037] Step one: place the concrete block in the concrete lower testing frame 2 and the concrete upper testing frame 3, and the height of the concrete block is equal to the height of the concrete lower testing frame 2 plus the height of the concrete upper testing frame 3.

[0038] Step two: start the hydraulic power cabinet 6 through the controller 7, and apply a loading force to the right side of the concrete upper testing frame 3 through the hydraulic cylinder 8.

[0039] Step three: after the application of the load, the spring 11 is compressed, the right end of the push head 10 and the left end of the hydraulic cylinder 8 are close, the electrode A 14 is in contact with the electrode B 15 and forms a loop with the controller 7; the controller 7 continuously increases the load.

[0040] Step four: when the load continuously increases to the fracture of the concrete block, the spring 11 returns to the initial state, the right end of the push head 10 is away from the left end of the hydraulic cylinder 8, the electrode A 14 is separated from the electrode B 15, the loop of the electrode A 14, the electrode B 15 and the controller 7 is disconnected, and the controller 7 sends a stop signal to the hydraulic power cabinet 6.

[0041] Step five: record the maximum load before the hydraulic power cabinet 6 stops, and calculate the maximum shear force of the concrete block through the maximum load at the time of stopping.

[0042] Example two:

[0043] Please refer to Figures 4-6 The concrete shear force testing device of the embodiment is basically the same as that of the first embodiment, and the main difference is that the concrete shear force testing device of the embodiment further comprises a hydraulic adjusting cabinet 16; the hydraulic adjusting cabinet 16 is arranged on the base 1 and is electrically connected with the controller 7; at the same time, the left end of the hydraulic cylinder 8 is provided with a mounting cavity 81, a push rod is mounted in the mounting cavity 81, and the right end of the mounting cavity 81 is in communication with the hydraulic adjusting cabinet 16 through a liquid inlet pipe 161 and a liquid outlet pipe 162. Based on the above difference, the pre-tightening force of the spring 11 can be adjusted.

[0044] The concrete shear force testing method based on the above device:

[0045] Step one: place the concrete block in the concrete lower test frame 2 and the concrete upper test frame 3, and the height of the concrete block is equal to the height of the concrete lower test frame 2 plus the height of the concrete upper test frame 3.

[0046] Step two: control the hydraulic adjusting cabinet 16 to adjust the amount of hydraulic oil in the mounting cavity 81 through the controller 7, so as to control the extension amount of the push rod 9 in the mounting cavity 81, and further control the pre-tightening force of the spring 11.

[0047] Step three: start the hydraulic power cabinet 6 through the controller 7, and apply a load to the right side of the concrete upper test frame 3 through the hydraulic cylinder 8.

[0048] Step four: after the application of the load, the spring 11 is compressed, the right end of the push head 10 and the left end of the hydraulic cylinder 8 are close, the electrode A 14 is in contact with the electrode B 15 and forms a loop with the controller 7; the controller 7 continuously increases the load.

[0049] Step five: when the loading force continues to increase to the point where the concrete block breaks, the spring 11 returns to its original state, the right end of the push head 10 moves away from the left end of the hydraulic cylinder 8, the electrode A 14 separates from the electrode B 15, the circuit of the electrode A 14, the electrode B 15 and the controller 7 is broken, and the controller 7 sends a stop signal to the hydraulic power cabinet 6.

[0050] Step six: record the maximum loading force before the hydraulic power cabinet 6 stops, and calculate the maximum shear strength of the concrete block by the maximum loading force at the time of stopping.

[0051] In the description of the present specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A concrete shear force testing apparatus, characterized by, The application relates to a concrete shear force testing device which comprises a base (1), a concrete lower testing frame (2), a concrete upper testing frame (3), a fixing block (4), a hydraulic power cabinet (6) and a controller (7) arranged on the base (1); the fixing block (4) and the hydraulic power cabinet (6) are arranged at the left and right ends of the base (1) respectively, the concrete lower testing frame (2) is arranged at the right end of the fixing block (4), the concrete upper testing frame (3) is arranged at the upper end of the concrete lower testing frame (2), and the controller (7) is electrically connected with the hydraulic power cabinet (6). The left side of the hydraulic power cabinet (6) is connected with a hydraulic cylinder (8), the left end of the hydraulic cylinder (8) is provided with a propelling head (10) through a propelling rod (9), the left side of the propelling head (10) is close to the concrete upper testing frame (3); wherein a spring (11) is further sleeved on the propelling rod (9) between the propelling head (10) and the hydraulic cylinder (8), and an electrode A (14) and an electrode B (15) are arranged on the opposite end walls between the propelling head (10) and the hydraulic cylinder (8) respectively, the electrode A (14) and the electrode B (15) are electrically connected with the controller (7) respectively.

2. The concrete shear testing apparatus of claim 1, wherein, The left and right ends of the spring (11) are connected with the right end of the propelling head (10) and the left end of the hydraulic cylinder (8) respectively.

3. The concrete shear testing apparatus of claim 1, wherein, An insulating block A (12) is arranged on the right end wall of the propelling head (10), and the electrode A (14) is arranged on the insulating block A (12); an insulating block B (13) is arranged on the left end wall of the hydraulic cylinder (8), and the electrode B (15) is arranged on the insulating block B (13).

4. The concrete shear testing apparatus of claim 1, wherein, When the left end wall of the hydraulic cylinder (8) is close to the right end wall of the propelling head (10), the electrode A (14) and the electrode B (15) are electrically connected, and signals are transmitted to the controller.

5. The concrete shear testing apparatus of claim 1, wherein, The upper end of the fixing block (4) is further connected with a protective cover (5).

6. The apparatus for testing the shearing force of concrete according to any one of claims 1 to 5, characterized in that, The concrete shear force testing device further comprises a hydraulic adjusting cabinet (16); the hydraulic adjusting cabinet (16) is arranged on the base (1) and is electrically connected with the controller (7); meanwhile, the left end of the hydraulic cylinder (8) is provided with a mounting cavity (81), the propelling rod is mounted in the mounting cavity (81), and the right end of the mounting cavity (81) is in communication with the hydraulic adjusting cabinet (16) through a liquid inlet pipe (161) and a liquid outlet pipe (162).

7. A method of testing concrete shear forces, characterized by, The concrete shear force testing device is adopted, and the device comprises the following specific steps: Step one: placing a concrete block in the concrete lower testing frame (2) and the concrete upper testing frame (3); Step two: starting the hydraulic power cabinet (6) through the controller (7), and applying a loading force to the right side of the concrete upper testing frame (3) through the hydraulic cylinder (8); Step three: after the loading force is applied, the spring (11) is compressed, the right end of the propelling head (10) and the left end of the hydraulic cylinder (8) are close to each other, the electrode A (14) and the electrode B (15) are in contact and form a loop with the controller (7), and the controller (7) continuously increases the loading force. Step four: when the loading force continues to increase to the concrete block fracture, the spring (11) returns to the initial state, the right end of the push head (10) away from the left end of the hydraulic cylinder (8), the electrode A (14) and the electrode B (15) are separated, the electrode A (14), the electrode B (15) and the controller (7) circuit break, the controller (7) sends a stop signal to the hydraulic power cabinet (6); Step five: record the maximum loading force before the hydraulic power cabinet (6) stops, and calculate the maximum shear force of the concrete block through the maximum loading force at the time of stopping.

8. The method of claim 7, wherein, When the concrete shear force testing device adopted includes a hydraulic regulating cabinet (16), the steps between step one and step two further include the following steps: the controller (7) controls the hydraulic regulating cabinet (16) to adjust the amount of hydraulic oil in the mounting cavity (81), thereby controlling the extension amount of the push rod (9) in the mounting cavity (81), and further controlling the pre-tightening force of the spring (11).

9. The method of claim 7 or 8, wherein, The height of the concrete block is equal to the height of the lower concrete test frame (2) plus the height of the upper concrete test frame (3).

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