Civil engineering structure anti-seismic test device

Abstract

The utility model provides an anti-seismic test device for a civil engineering structure, and mainly relates to the technical field of anti-seismic test equipment. A civil engineering structure anti-seismic test device comprises a base and a test bed installed on the base in a sliding fit mode, sliding rails are fixedly installed on the front side and the rear side of the top face of the base respectively, sliding blocks are installed on the sliding rails in a sliding fit mode, and the top faces of the sliding blocks are fixedly connected with the bottom face of the test bed. The test bench is driven by an adjustable reciprocating mechanism to move left and right, and the adjustable reciprocating mechanism is installed on one side of the top face of the base. The beneficial effects of the utility model lie in that through the design of the adjustable reciprocating mechanism, especially the lifting assembly therein, the moving frequency and amplitude of the test bench can be accurately adjusted according to actual needs, the flexibility and application range of the equipment are greatly enhanced, and the requirements of different test objects and conditions are met.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of seismic testing equipment, specifically a seismic testing device for civil engineering structures. Background Technology

[0002] As the foundation of human life and production, the safety and stability of civil engineering structures are of paramount importance. Especially in earthquake-prone areas, the seismic performance of civil engineering structures becomes a core consideration in design and construction. To improve the seismic resistance of civil engineering structures and reduce losses caused by earthquakes, seismic-resistant technologies have been extensively researched and developed.

[0003] In the development of seismic technology, seismic testing has played a crucial role. By simulating the structural response under seismic loads, seismic tests can assess the seismic performance of structures, providing key data support for optimizing structural design and improving seismic performance. However, existing seismic test benches mainly rely on motor-driven reciprocating mechanisms to achieve the reciprocating movement of the test bench. The movement frequency of the test bench can only be controlled by the motor, resulting in certain limitations in the simulation of seismic environments and structural responses of existing seismic test devices. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a seismic testing device for civil engineering structures, achieved through the following technical solution:

[0005] A seismic testing device for civil engineering structures includes a base and a test platform that is slidably installed with the base. Slide rails are fixedly installed on the front and rear sides of the top surface of the base, and sliders are slidably installed on each slide rail. The top surface of each slider is fixedly connected to the bottom surface of the test platform. The test platform is moved left and right by an adjustable reciprocating mechanism, and the adjustable reciprocating mechanism is installed on one side of the top surface of the base.

[0006] Furthermore, the adjustable reciprocating mechanism includes a motor installed on one side of the top surface of the base, a disc fixedly installed at the output end of the motor, a lifting assembly fixedly installed in front of the disc, a connecting plate fixedly installed at the center of the bottom surface of the test bench, a push rod fixedly installed on the side of the connecting plate facing the motor, a rocker arm rotatably installed at one end of the push rod, and the other end of the rocker arm rotatably connected to the lifting assembly.

[0007] Furthermore, the lifting assembly includes a hollow support block with a through groove at its front. A movable block is slidably installed inside the support block. A threaded sleeve is located at the center of the top surface of the movable block, and an adjusting screw is threadedly installed inside the threaded sleeve. The upper end of the adjusting screw is rotatably connected to the top surface of the inner wall of the support block. The adjusting screw vertically penetrates the bottom of the movable block and is connected to its bearing. A connecting column is fixedly installed at the front of the movable block. The connecting column extends through the through groove to the outside of the support block and longitudinally penetrates one end of the rocker arm and is connected to its bearing.

[0008] Furthermore, the motor is selected as a stepper motor.

[0009] Furthermore, a number of evenly distributed connecting rods are fixedly installed on the top surface of the push rod, and the upper ends of the connecting rods are all fixedly connected to the bottom surface of the test bench.

[0010] Compared with the existing technology, the beneficial effects of this utility model are:

[0011] This device allows users to easily adjust the distance between the rocker arm and the center of the disc by adjusting the adjusting screw in the lifting assembly, thereby adjusting the movement frequency and amplitude of the test platform. This design makes the device suitable for seismic testing requirements at different vibration frequencies, improving its flexibility and applicability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 This is a side view of the present invention;

[0015] Figure 4 It is along Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0016] Figure 5 This is a schematic diagram of the lifting assembly of this utility model;

[0017] Figure 6 yes Figure 5 A magnified view of part I.

[0018] The following are the labels in the attached diagram: 1. Base; 2. Test bench; 3. Slide rail; 4. Slider; 5. Motor; 6. Disc; 7. Connecting plate; 8. Push rod; 9. Rocker arm; 10. Support block; 11. Through slot; 12. Moving block; 13. Adjusting screw; 14. Connecting column; 15. Connecting rod. Detailed Implementation

[0019] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0020] Example: A seismic testing device for civil engineering structures

[0021] like Figure 1-6 As shown, a seismic testing device for civil engineering structures includes the following specific structures:

[0022] The base 1 and the test bench 2 are slidably installed with the base 1. Slide rails 3 are fixedly installed on the front and rear sides of the top surface of the base 1, and sliders 4 are slidably installed on each slide rail 3. The top surface of each slider 4 is fixedly connected to the bottom surface of the test bench 2. The test bench 2 is driven to move left and right by an adjustable reciprocating mechanism, and the adjustable reciprocating mechanism is installed on one side of the top surface of the base 1.

[0023] The adjustable reciprocating mechanism includes a motor 5 installed on one side of the top surface of the base 1. The motor 5 is electrically connected to a power source. A disc 6 is fixedly installed at the output end of the motor 5. A lifting assembly is fixedly installed in front of the disc 6. A connecting plate 7 is fixedly installed at the center of the bottom surface of the test bench 2. A push rod 8 is fixedly installed on the side of the connecting plate 7 facing the motor 5. A rocker arm 9 is rotatably installed at one end of the push rod 8. The other end of the rocker arm 9 is rotatably connected to the lifting assembly.

[0024] When conducting seismic tests, the motor 5 is powered on and operates. The output shaft of the motor 5 drives the disk 6 connected to it to rotate synchronously. At this time, the disk 6 drives the rocker arm 9 to swing through the lifting assembly, thereby causing the rocker arm 9 to continuously drive the push rod 8 to reciprocate left and right. In turn, the push rod 8 drives the test platform 2 to reciprocate through the connecting plate 7. The frequency of the push rod 8's left and right movement can be changed by changing the speed of the motor 5, thereby changing the movement frequency of the test platform 2. It can realize seismic testing of the structural component under different vibration frequencies as needed.

[0025] The lifting assembly includes a hollow support block 10. A through slot 11 is provided on the front of the support block 10. A movable block 12 is slidably installed inside the support block 10. A threaded sleeve is provided at the center of the top surface of the movable block 12. An adjusting screw 13 is threadedly installed inside the threaded sleeve. The upper end of the adjusting screw 13 is rotatably connected to the top surface of the inner wall of the support block 10. The adjusting screw 13 vertically penetrates the bottom of the movable block 12 and is connected to its bearing. A connecting column 14 is fixedly installed on the front of the movable block 12. The connecting column 14 extends through the through slot 11 to the outside of the support block 10, and the connecting column 14 longitudinally penetrates one end of the rocker arm 9 and is connected to its bearing.

[0026] In use, this structural design allows the moving block 12, which is threadedly engaged with the adjusting screw 13, to move axially along the support block 10, thereby changing the distance between the moving block 12 and the center of the disk 6. This, in turn, adjusts the distance between the right end of the rocker arm 9 and the center of the disk 6. The smaller the distance between the right end of the rocker arm 9 and the center of the disk 6, the faster the rocker arm 9 swings, and the smaller the movement distance of the push rod 8 and the test platform 2. Conversely, the larger the distance between the right end of the rocker arm 9 and the center of the disk 6, the slower the rocker arm 9 swings, and the larger the movement distance of the push rod 8 and the test platform 2. Users can adjust this independently according to their testing needs, greatly improving the convenience and controllability of the device.

[0027] The motor 5 is a stepper motor. A stepper motor is an open-loop control element that converts electrical pulse signals into angular or linear displacement, offering advantages such as high positioning accuracy, simple control, and no cumulative error. In this device, the stepper motor can precisely control the rotation angle and speed of the disk 6, thereby achieving precise adjustment of the movement frequency and amplitude of the test bench 2. This precise control capability makes the seismic test results more accurate and reliable, helping researchers to conduct more in-depth analysis and research on the seismic performance of civil engineering structures.

[0028] Several evenly distributed connecting rods 15 are fixedly installed on the top surface of the push rod 8, and the upper ends of the connecting rods 15 are all fixedly connected to the bottom surface of the test bench 2. This structural design not only increases the connection strength between the push rod 8 and the test bench 2, but also allows the test bench 2 to move more smoothly when subjected to reciprocating thrust, avoiding swaying or displacement caused by uneven force. At the same time, the evenly distributed connecting rods 15 also enable the test bench 2 to maintain good overall stability when subjected to large loads, thereby ensuring the accuracy and safety of the seismic test.

[0029] This solution also includes a controller, the location of which is set by the operator according to the actual situation during operation. The controller is used to control the electrical components used in this solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, displays, computer input devices, switches, communication devices, lights, speakers, and microphones. The controller is an Intel processor, AMD processor, PLC controller, ARM processor, or microcontroller. It is used in conjunction with a motherboard, memory modules, storage media, and power supply, which is AC power or a lithium battery. When a display screen is provided, a graphics card is also included. For the operating principle of the controller, please refer to "Principles of Automatic Control," "Microcontroller Principles and Application Simulation Cases," and "Sensor Principles and Applications" published by Tsinghua University Press. Other books in this field can also be consulted. Other automation control and electrical components not mentioned are knowledge well known to those skilled in the art and will not be described in detail here.

[0030] In explaining this utility model, it should be noted that the terms indicating location are only for ease of description and understanding, and are not intended to limit the installation location of specific technical features. Other possible installation methods are not excluded.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A seismic test device for civil engineering structures, comprising a base (1) and a test table (2) mounted in sliding engagement with the base (1), characterised in that: The top surface of the base (1) is fixedly provided with slide rails (3) on the front and rear sides, respectively, the slide rails (3) are slidably provided with slide blocks (4), the top surface of the slide blocks (4) is fixedly connected with the bottom surface of the test table (2), the test table (2) is driven to move left and right by an adjustable reciprocating mechanism, and the adjustable reciprocating mechanism is installed on one side of the top surface of the base (1).

2. A device for seismic testing of civil engineering structures according to claim 1, characterized in that: The adjustable reciprocating mechanism comprises a motor (5) installed on one side of the top surface of the base (1), the output end of the motor (5) is fixedly provided with a disc (6), the front surface of the disc (6) is fixedly provided with a lifting assembly, the bottom surface of the test table (2) is fixedly provided with a connecting plate (7) at the center, one side of the connecting plate (7) towards the motor (5) is fixedly provided with a push rod (8), one end of the push rod (8) is rotatably provided with a rocker (9), and the other end of the rocker (9) is rotatably connected with the lifting assembly.

3. A device for seismic testing of civil engineering structures according to claim 2, characterized in that: The lifting assembly comprises a hollow support block (10), the front surface of the support block (10) is provided with a through slot (11), the support block (10) is slidably provided with a moving block (12), the top surface of the moving block (12) is provided with a threaded sleeve at the center, the threaded sleeve is threadedly provided with an adjusting screw (13), the upper end of the adjusting screw (13) is rotatably connected with the top surface of the inner wall of the support block (10), the adjusting screw (13) vertically penetrates the bottom of the moving block (12) and is connected with the bearing thereof, the front surface of the moving block (12) is fixedly provided with a connecting column (14), the connecting column (14) extends to the outside of the support block (10) through the through slot (11), and the connecting column (14) vertically penetrates one end of the rocker (9) and is connected with the bearing thereof.

4. A seismic testing device for civil engineering structures as claimed in claim 2, wherein: The motor (5) is a stepping motor.

5. A seismic testing device for civil engineering structures as claimed in claim 2, wherein: The top surface of the push rod (8) is fixedly provided with a plurality of evenly distributed connecting rods (15), and the upper ends of the connecting rods (15) are fixedly connected with the bottom surface of the test table (2).

Images