A prestressed concrete short t-beam bearing capacity detection device
By designing a multi-point pressure application component and support structure driven by a hydraulic cylinder, the limitations of single-point detection in the existing technology have been overcome, realizing the flexibility and stability of multi-point load-bearing capacity detection and reducing equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI CHANGJIANG ROAD & BRIDGE CO
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing technology, the concrete short T-beam bearing capacity testing device cannot achieve multi-point pressure testing when only a single hydraulic pressure structure is retained, resulting in limited testing range and high cost.
A prestressed concrete short T-beam bearing capacity testing device was designed. The device uses a hydraulic cylinder to drive the connecting components and the pressure application components, and uses multiple pressure application components to apply pressure to the short T-beam sample at multiple points. The structural stiffness of the I-beam is improved by the support components to ensure the stability and flexibility of force transmission.
This technology enables the simultaneous application of pressure to multiple points on a short T-beam using a single hydraulic cylinder, improving the flexibility and practicality of the inspection, reducing equipment costs, and ensuring the effectiveness and stability of the inspection.
Smart Images
Figure CN224552888U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete beam load-bearing capacity testing technology, specifically to a prestressed concrete short T-beam load-bearing capacity testing device. Background Technology
[0002] Prestressed concrete short-ribbed T-beams are a new type of bridge structure. Compared with traditional T-beams, their main characteristics are smaller structural height, easier construction, more reasonable stress distribution, and better durability. To ensure the quality of concrete short-ribbed T-beams, their load-bearing capacity needs to be tested before they are put into use. Most of the concrete short-ribbed T-beams tested indoors are prototypes, generally not exceeding five meters in height. The testing methods are divided into concentrated load testing and uniformly distributed load testing. Among them, the concentrated load value of short-ribbed T-beams within five meters needs to meet a compressive strength of 180KN. The uniformly distributed load testing method requires the deployment of multiple hydraulic pressure devices. However, because each hydraulic pressure device is large in size and heavy in weight, it is also necessary to improve the overall stiffness and support strength of the supporting structure, resulting in high actual use costs and limited implementation scope.
[0003] Currently, the utility model patent with patent number CN221224448U discloses a low-height, densely ribbed prestressed concrete T-beam flexural load testing device. This patent uses hydraulic components and buffer pads to apply pressure to the T-beam body as the pressure of the hydraulic components gradually increases, thereby obtaining the load-bearing capacity of the T-beam body. It can achieve the effect of load-bearing capacity testing relatively quickly. By using a concentrated load method, it can reflect the load-bearing capacity of the T-beam under extreme conditions, and it is convenient to observe crack morphology, deflection abrupt changes, and failure modes.
[0004] The above-mentioned technical solution is the same as the existing technology. When testing the load-bearing capacity of concrete T-beams, the T-beams are pressurized by applying concentrated loads, which can directly test the load-bearing capacity. However, this method can only test one point of the concrete T-beam and cannot achieve multi-point pressurization testing when only a single hydraulic pressurization structure is retained. Based on this, this application provides a prestressed concrete short T-beam load-bearing capacity testing device to solve the above problems and meet the needs of load-bearing capacity testing of concrete short T-beams under different pressurization scenarios. Utility Model Content
[0005] Based on the above description, this utility model provides a prestressed concrete short T-beam bearing capacity testing device to solve the problem that existing bearing capacity testing devices cannot perform multi-point pressure testing when only a single hydraulic pressure structure is retained.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a prestressed concrete short T-beam bearing capacity testing device, including a hydraulic cylinder for applying pressure, and a T-beam bearing frame for placing short T-beam samples;
[0007] The piston end of the hydraulic cylinder is equipped with a detection mechanism located above the T-beam support frame;
[0008] The detection mechanism includes several pressure-applying components that apply pressure to the short T-beam, and a connecting component that connects the hydraulic cylinder and the pressure-applying components.
[0009] The connecting assembly includes an I-beam and a support member disposed on the I-beam to enhance the structural rigidity of the I-beam. Two sliding grooves are provided on the outer side of the I-beam.
[0010] The pressure application assembly includes a pressure application component and two sliding components disposed on the top of the pressure application component, the sliding components being slidably connected in a sliding groove on the same side;
[0011] The top of the pressure-applying component abuts against the bottom of the I-beam.
[0012] The above technical solution enables the hydraulic cylinder to drive the connecting assembly and the pressure application assembly to move, and applies pressure to the short T-beam sample through the pressure application component on the pressure application assembly.
[0013] Based on the above technical solution, the present invention can be further improved as follows.
[0014] Furthermore, the pressure-applying component includes a pressure-applying block, and the top of the pressure-applying block is provided with two first abutting blocks and one second abutting block.
[0015] The above technical solution allows pressure to be applied to different points on the short T-beam sample via a pressure block.
[0016] Furthermore, the two first abutting blocks are symmetrically distributed with the second abutting block as the center. The tops of the first abutting blocks and the tops of the second abutting blocks are located on the same horizontal plane and both abut against the bottom of the I-beam.
[0017] The above technical solution allows the first and second abutting blocks to simultaneously abut against the bottom of the I-beam.
[0018] Furthermore, the top and bottom of the sliding groove are both open.
[0019] The sliding component includes a sliding rod disposed on the top of the pressure block, and a limit plate is fixed to the top of the sliding rod.
[0020] The above technical solution enables the pressure block to move via the corresponding two sliding parts.
[0021] Furthermore, the sliding rod is slidably connected to the sliding groove on the same side, and the limiting plate is located above the sliding groove, with the width of the limiting plate being greater than the width of the sliding groove.
[0022] The above technical solution enables the sliding rod to slide within the sliding groove on the same side under the limiting action of the limiting plate.
[0023] Furthermore, the support member includes a connecting column located between the top of the I-beam and the piston end of the hydraulic cylinder, and several diagonal braces are provided on the outer side of the connecting column and the I-beam support.
[0024] The above technical solution uses diagonal bracing to provide auxiliary support, thereby improving the overall structural rigidity.
[0025] Furthermore, a first support rod is provided between the bottom of the diagonal brace and the top of the I-beam. The I-beam includes an upper flange, a lower flange, and a web connecting the upper flange and the lower flange.
[0026] Several second support rods are provided on the outer side between the opposite sides of the upper and lower flanges. The sliding groove is opened on the lower flange and is located on the side close to the web.
[0027] The above technical solution improves the load-bearing capacity between the upper and lower flanges by using the second support rod, making the lower flange less prone to deformation.
[0028] Furthermore, the first abutment block is located on the opposite side of the two sliding rods, and the first abutment block and the second support rod on the same side are located in the same vertical plane;
[0029] The second abutment block and the web are located in the same vertical plane.
[0030] The above technical solution ensures that the reaction force received by the first abutment block when it is pressed is consistent with the setting direction and position of the second support rod; the reaction force received by the second abutment block is consistent with the setting direction and position of the web plate, thereby improving the stability of the pressurization.
[0031] Furthermore, the outer side of the T-beam support frame is provided with four columns, and a top beam is provided between the tops of the four columns. The bottom of the top beam is fixed to the top of the hydraulic cylinder, and a control host that plays a general control role is provided on the top beam.
[0032] Through the above technical solution, the host computer can play the role of master control.
[0033] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0034] 1. It can use a single hydraulic cylinder to simultaneously apply pressure to one or more points on the short T-beam, so as to test the changes of the short T-beam sample under different conditions; it can make simple and arbitrary adjustments to the pressure points, and increase or decrease the pressure points according to actual needs, thus improving the practicality of the testing device.
[0035] 2. By using support components, the structural stiffness of the I-beam can be improved to meet the overall or local stress requirements during the pressure application process; at the same time, the pressure application components in contact with the short T-beam can directly transfer the reaction force to the I-beam, so that the force transmission can remain stable, thereby ensuring the effectiveness of the load-bearing capacity test. Attached Figure Description
[0036] Figure 1 A schematic diagram of the overall structure of a prestressed concrete short T-beam bearing capacity testing device provided for an embodiment of this utility model;
[0037] Figure 2 This is a schematic diagram of the connection structure between the connecting component and the pressure applying component in an embodiment of this utility model;
[0038] Figure 3 This is an embodiment of the present utility model. Figure 2 A diagram showing the view from the right.
[0039] Figure 4 This is a schematic diagram of the connecting component in an embodiment of the present utility model;
[0040] Figure 5 This is a schematic diagram of the pressure application component in an embodiment of the present invention.
[0041] Reference numerals: 1. Hydraulic cylinder; 2. T-beam support frame;
[0042] 3. Connecting components; 31. I-beam; 32. Connecting column; 33. Diagonal brace; 34. First support rod; 35. Second support rod; 36. Sliding groove;
[0043] 4. Pressure application component; 41. Pressure application block; 42. First abutment block; 43. Second abutment block; 44. Sliding rod; 45. Limiting plate;
[0044] 5. Column; 6. Top beam; 7. Control host. Detailed Implementation
[0045] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0047] Example: Reference Figure 1 and Figure 2 A prestressed concrete short T-beam bearing capacity testing device includes a hydraulic cylinder 1 for applying pressure and a T-beam support frame 2 for placing short T-beam samples. The piston end of the hydraulic cylinder 1 is provided with a testing mechanism located above the T-beam support frame 2. The testing mechanism includes several pressure-applying components 4 for applying pressure to the short T-beam and a connecting component 3 connecting the hydraulic cylinder 1 and the pressure-applying components 4. The connecting component 3 includes an I-beam 31 and a support member provided on the I-beam 31 to enhance the structural stiffness of the I-beam 31. Two sliding grooves 36 are provided on the outer side of the I-beam 31. The pressure-applying components 4 include a pressure-applying member and two sliding members provided on the top of the pressure-applying member. The sliding members are slidably connected in the sliding grooves 36 on the same side. The top of the pressure-applying member abuts against the bottom of the I-beam 31.
[0048] It should be noted that the hydraulic cylinder 1 determines the applied pressure by the amount of input pressure oil. Specifically, the hydraulic cylinder 1 applies different pressures through a matching hydraulic system, which is a publicly available technology and will not be described in detail here.
[0049] refer to Figure 3 The pressure-applying component includes a pressure-applying block 41. The top of the pressure-applying block 41 is provided with two first abutting blocks 42 and one second abutting block 43. The two first abutting blocks 42 are symmetrically distributed with the second abutting block 43 as the center. The top of the first abutting block 42 and the top of the second abutting block 43 are located on the same horizontal plane and both abut against the bottom of the I-beam 31. This allows the first abutting blocks 42 and the second abutting blocks 43 to abut against the bottom of the I-beam 31 at the same time. Thus, when the pressure-applying block 41 applies pressure to the short T-beam sample, the downward pressure applied by the I-beam 31 can be stably transmitted to the first abutting blocks 42 and the second abutting blocks 43.
[0050] In use, the I-beam 31 drives the pressure block 41 to approach the short T-beam sample, and the bottom of the I-beam 31 applies pressure to the first abutment block 42 and the second abutment block 43, thereby squeezing the corresponding position of the short T-beam sample through the pressure block 41.
[0051] refer to Figure 4 and Figure 5 The top and bottom of the sliding groove 36 are both open; the sliding member includes a sliding rod 44 located on the top of the pressure block 41, and a limit plate 45 is fixed at the top of the sliding rod 44, so that the pressure block 41 can move through the corresponding two sliding members.
[0052] refer to Figure 2 The sliding rod 44 is slidably connected to the sliding groove 36 on the same side. The limiting plate 45 is located above the sliding groove 36. The width of the limiting plate 45 is greater than the width of the sliding groove 36, so that the sliding rod 44 can be slidably connected to the sliding groove 36 on the same side under the limiting action of the limiting plate 45.
[0053] In use, the sliding rod 44 can enter the inner side of the corresponding sliding groove 36 through the opening on the outside of the sliding groove 36. The limiting plate 45 can provide support, so that several pressure blocks 41 are normally limited at the bottom of the I-beam 31. The position of the pressure block 41 can be changed or the number of pressure blocks 41 can be increased or decreased according to actual needs.
[0054] It should be noted that when the pressure block 41 is placed at the bottom of the I-beam 31, it should be placed in the center or at least one pressure block 41 should be placed on both sides of the I-beam 31 to prevent the center of gravity from being unstable due to the lack of a pressure block 41 on one side of the I-beam 31, which would affect the stability of the pressure transmission.
[0055] refer to Figure 1 and Figure 2 The support includes a connecting column 32 located between the top of the I-beam 31 and the piston end of the hydraulic cylinder 1. Several diagonal braces 33 are provided on the outside of the connecting column 32 and the I-beam 31. The diagonal braces 33 can play an auxiliary support role, thereby improving the rigidity of the overall structure and making the overall force on the I-beam 31 relatively uniform.
[0056] In use, the connecting column 32 is moved by the hydraulic cylinder 1, which in turn drives the I-beam 31 to move linearly with the cooperation of the diagonal brace 33.
[0057] refer to Figure 2 and Figure 4 A first support rod 34 is provided between the bottom of the diagonal brace 33 and the top of the I-beam 31. The I-beam 31 includes an upper flange, a lower flange, and a web connecting the upper flange and the lower flange. Several second support rods 35 are provided on the outer side between the opposite sides of the upper flange and the lower flange. A sliding groove 36 is opened on the lower flange and located on the side close to the web. The second support rods 35 can improve the load-bearing capacity between the upper flange and the lower flange, making the lower flange less prone to deformation.
[0058] It should be noted that after the sliding groove 36 is opened, the area of the lower flange is further reduced and the outer side lacks support. The second support rod 35 can connect the outer side of the lower flange to the upper flange, so that the upper flange can play an auxiliary support role, thereby ensuring the stability of the pressure application process.
[0059] refer to Figure 3and Figure 5 The first abutment block 42 is located on the opposite side of the two sliding rods 44, and the first abutment block 42 and the second support rod 35 on the same side are located in the same vertical plane; the second abutment block 43 and the web are located in the same vertical plane, so that the reaction force received by the first abutment block 42 when it applies pressure can be consistent with the setting direction and position of the second support rod 35; the reaction force received by the second abutment block 43 can be consistent with the setting direction and position of the web, thereby improving the stability of the pressure application.
[0060] refer to Figure 1 The outer side of the T-beam support frame 2 is also provided with four columns 5, and a top beam 6 is provided between the tops of the four columns 5. The bottom of the top beam 6 is fixed to the top of the hydraulic cylinder 1. The top beam 6 is provided with a control host 7 that plays a general control role. The control host 7 can play a main control role.
[0061] It should be noted that the control host 7 is electrically connected to the hydraulic cylinder 1, enabling the control host 7 to control the start or stop of the hydraulic cylinder 1. The control host 7 is electrically connected to the main controller and the power supply. The main controller can be a known control device such as a computer, which can be implemented by simple programming by those skilled in the art. Moreover, the electrical connection technology is a publicly available technology, so it will not be described in detail.
[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for testing the bearing capacity of prestressed concrete short T-beams, comprising a hydraulic cylinder (1) for applying pressure, and a T-beam support frame (2) for placing short T-beam samples; Its features are, The piston end of the hydraulic cylinder (1) is provided with a detection mechanism located above the T-beam support frame (2); The detection mechanism includes several pressure-applying components (4) for applying pressure to the short T-beam, and a connecting component (3) connecting the hydraulic cylinder (1) and the pressure-applying components (4); The connecting component (3) includes an I-beam (31) and a support member provided on the I-beam (31) to enhance the structural rigidity of the I-beam (31). Two sliding grooves (36) are provided on the outer side of the I-beam (31). The pressure application component (4) includes a pressure application member and two sliding members disposed on the top of the pressure application member, the sliding members being slidably connected in the sliding groove (36) on the same side; The top of the pressure-applying component abuts against the bottom of the I-beam (31).
2. The prestressed concrete short T-beam bearing capacity testing device according to claim 1, characterized in that, The pressure-applying component includes a pressure-applying block (41), and the top of the pressure-applying block (41) is provided with two first abutting blocks (42) and a second abutting block (43).
3. The prestressed concrete short T-beam bearing capacity testing device according to claim 2, characterized in that, The two first abutting blocks (42) are symmetrically distributed with the second abutting block (43) as the center. The top of the first abutting block (42) and the top of the second abutting block (43) are on the same horizontal plane and both abut against the bottom of the I-beam (31).
4. The prestressed concrete short T-beam bearing capacity testing device according to claim 2, characterized in that, The top and bottom of the sliding groove (36) are both open; The sliding member includes a sliding rod (44) disposed on the top of the pressure block (41), and a limit plate (45) is fixed at the top of the sliding rod (44).
5. The prestressed concrete short T-beam bearing capacity testing device according to claim 4, characterized in that, The sliding rod (44) is slidably connected to the sliding groove (36) on the same side, and the limiting plate (45) is located above the sliding groove (36), with the width of the limiting plate (45) being greater than the width of the sliding groove (36).
6. The prestressed concrete short T-beam bearing capacity testing device according to claim 3, characterized in that, The support includes a connecting column (32) located between the top of the I-beam (31) and the piston end of the hydraulic cylinder (1), and several diagonal braces (33) are provided on the outside of the connecting column (32) and the I-beam (31).
7. The prestressed concrete short T-beam bearing capacity testing device according to claim 6, characterized in that, A first support rod (34) is provided between the bottom of the diagonal brace (33) and the top of the I-beam (31). The I-beam (31) includes an upper flange, a lower flange, and a web connecting the upper flange and the lower flange. A plurality of second support rods (35) are provided on the outer side between the opposite sides of the upper and lower flanges, and the sliding groove (36) is opened on the lower flange and located on the side close to the web.
8. The prestressed concrete short T-beam bearing capacity testing device according to claim 7, characterized in that, The first abutting block (42) is located on the opposite side of the two sliding rods (44), and the first abutting block (42) and the second support rod (35) on the same side are located in the same vertical plane; The second abutment block (43) and the web are located in the same vertical plane.
9. The prestressed concrete short T-beam bearing capacity testing device according to any one of claims 1-8, characterized in that, The T-beam support frame (2) is also provided with four columns (5) on the outside. A top beam (6) is provided between the tops of the four columns (5). The bottom of the top beam (6) is fixed to the top of the hydraulic cylinder (1). A control host (7) that plays a general control role is provided on the top beam (6).