Super-long cantilever bent cap destructive test device

Abstract

The utility model relates to the technical field of bridge construction engineering, in particular to a super-long cantilever bent cap destructive test device which comprises a base, an adjusting mechanism is arranged in the base, two sets of bearing bases are installed on the adjusting mechanism in a matched mode, and fixing supports are fixedly arranged on the left side and the right side in each base. A translation mechanism is arranged at the top position between the two groups of fixed supports, a hydraulic cylinder is assembled on the translation mechanism, a loading head is fixedly arranged at the output end of the hydraulic cylinder, and a pressure sensor is embedded in the loading head. The hydraulic cylinder loading and pressure applying mode is adopted, the super-long cantilever cover beam can be continuously loaded, load simulation of the super-long cantilever cover beam is achieved, the bearing capacity and the damage characteristic of the super-long cantilever cover beam are accurately evaluated, meanwhile, the position of the hydraulic cylinder can be adjusted through the arranged translation mechanism, the loading position of the super-long cantilever cover beam is adjusted, and the loading accuracy of the super-long cantilever cover beam is improved. Load simulation of different positions on the super-long cantilever bent cap can be achieved, and destructive analysis of the bearing capacity of the bent cap under the simulated real working condition is met.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction engineering, and particularly relates to a destructive test device for an ultra-long cantilever bent cap. Background Technique

[0002] An ultra-long cantilever bent cap refers to a cantilever bent cap structure in bridge engineering, where its overhanging part (i.e., the end without direct support from bearings) is relatively long. Generally, it refers to a cantilever bent cap that exceeds the conventional design standard and can span a relatively large space. The cantilever bent cap is a part of the upper structure of the bridge, spanning between bridge piers and supporting the bridge deck or bridge slab, while the "cantilever" part extends on both sides of the main span and is a structural section without direct support. The special feature of the cantilever bent cap structure is that its distal end does not directly rest on the bridge pier or other supporting structures, but through its own strength and stiffness, as well as a firm connection with the bridge pier, it bears the weight and various external forces (such as vehicle loads, wind loads, seismic forces, etc.) transmitted from the bridge deck.

[0003] In the construction of urban viaduct bridges, the application of ultra-long cantilever bent caps is becoming more and more widespread. As a key structural component in modern bridge engineering, the safety performance of ultra-long cantilever bent caps is directly related to the stability and service life of the entire bridge. However, due to its special stress state and complex stress distribution, existing detection methods often have difficulty accurately simulating the bearing capacity and potential failure mechanisms under actual working conditions. At present, there is a lack of an effective destructive test device in the market to comprehensively detect the performance of ultra-long cantilever bent caps. Therefore, it is particularly important to develop a destructive test device for ultra-long cantilever bent caps in bridge engineering. Summary of the Utility Model

[0004] Aiming at the existing deficiencies, the purpose of the utility model is to provide a destructive test device for an ultra-long cantilever bent cap to solve the problems raised in the above background technique. This device can simulate the most extreme load conditions borne by the ultra-long cantilever under actual working conditions to detect the performance of the ultra-long cantilever bent cap. By controlling the load loading process, observing and analyzing the bearing limit and failure mode of the bent cap, it provides a scientific basis for bridge design and maintenance.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A destructive test device for an ultra-long cantilever bent cap includes a base. An adjustment mechanism is arranged inside the base, and two groups of bearing bases are fitted on the adjustment mechanism. Fixed brackets are fixedly arranged on the left and right sides inside the base. A translation mechanism is arranged at the top position between the two groups of fixed brackets. A hydraulic cylinder is assembled on the translation mechanism, and a loading head is fixedly arranged at the output end of the hydraulic cylinder. A pressure sensor is embedded inside the loading head.

[0007] Furthermore, a hood is provided on the upper side of the base, and a double door is provided on the front side of the hood.

[0008] Furthermore, the translation mechanism includes a fixed support rod, a support platform and an ear plate. The fixed support rod is provided in two groups and is symmetrically fixed on the front and rear sides between the two groups of fixed supports. A support platform is provided between the two groups of fixed support rods. Ear plates are fixed at the four corners of the support platform. The ear plates are sleeved on the fixed support rod and slidably connected thereto, and the hydraulic cylinder is fixedly mounted on the platform.

[0009] Furthermore, a rack plate is laterally arranged on the front side of the hydraulic cylinder, and both ends of the rack plate are fixedly connected to a fixed bracket. A driving motor is installed on the support platform on the left side of the hydraulic cylinder, and a driving gear is assembled on the output end of the driving motor, and the driving gear is meshed and transmission-connected with the rack plate.

[0010] Furthermore, the adjustment mechanism includes a screw, an adjustment support and a nut. The screw is transversely fixed inside the base, the adjustment support is fixed at the bottom of the supporting base, the adjustment support is sleeved on the screw and slidably connected to it, and the screws on the left and right sides of the adjustment support are both equipped with nuts.

[0011] Furthermore, guide rods are provided on both the front and rear sides of the screw rod, and the adjustment support is movably sleeved on the guide rods.

[0012] Furthermore, a T-shaped limiting slider is fixedly provided at the bottom of the adjusting support, and a limiting sliding groove for accommodating the limiting slider is opened at the bottom of the base, and the limiting slider is inserted into the limiting sliding groove.

[0013] Furthermore, a plurality of positioning holes for fixing the cap beam are provided inside the supporting base.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model adopts the method of hydraulic cylinder loading and pressurizing, which can continuously load the super-long cantilever cap beam and realize load simulation of the super-long cantilever cap beam to accurately evaluate its bearing capacity and destructive characteristics. At the same time, the position of the hydraulic cylinder can be adjusted through the set translation mechanism to adjust the loading position of the super-long cantilever cap beam, which can realize load simulation at different positions on the super-long cantilever cap beam and meet the destructive analysis of the bearing capacity of the cap beam under simulated real working conditions.

[0016] 2. In the utility model, a hood is arranged on the upper side of the base, which provides a physical protective barrier for the device to prevent the operator from being injured by splashing debris or other unexpected situations that may occur during the test. At the same time, the hood can protect the internal structure from dust, dirt and other external pollutants, thereby ensuring the long-term stable operation of the equipment.

[0017] 3. In the present utility model, the rack plate, the driving motor, and the driving gear together constitute the transmission system of the translation mechanism, which facilitates driving the translation mechanism to move. When the driving motor is started, the driving gear will rotate, and through meshing with the rack plate, the rotational motion is converted into the linear motion of the support platform and the hydraulic cylinder, realizing the translation of the hydraulic cylinder. Through precise control of the driving motor, the translational adjustment of the position of the hydraulic cylinder can be achieved, ensuring that the loading head can conduct loading tests on different parts of the cantilevered capping beam.

[0018] 4. The present utility model facilitates the support and fixation of cantilevered capping beams of different specifications (such as single pier columns or double pier columns) through the two sets of bearing bases provided, improving the applicable range of the device. At the same time, the adjustment mechanism provided facilitates the movement adjustment of the positions of the two sets of bearing bases to adapt to cantilevered capping beams of different lengths and specifications. Guide rods are provided on both the front and rear sides of the screw rod, and the adjusting support is movably sleeved on the guide rods. The guide rods provide additional support and guidance for the movement of the adjusting support, ensuring that the adjusting support does not deviate during the movement process and improving the movement smoothness of the adjusting support.

[0019] 5. The limit slider cooperating with the limit chute plays a role of limit and guidance for the adjusting support from the bottom, further increasing the stability and accuracy of the sliding of the adjusting support. At the same time, the limit slider can provide support for the adjusting support and the bearing base from the bottom, ensuring the stability of the cantilevered capping beam during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0021] Figure 2 is a schematic diagram of the internal structure of the machine cover in the present utility model.

[0022] Figure 3 is a schematic diagram of the structure of the translation mechanism in the present utility model.

[0023] Figure 4 is a schematic diagram of the bottom structure of the translation mechanism in the present utility model.

[0024] Figure 5 is a schematic diagram of the structure of the adjustment mechanism in the present utility model.

[0025] Figure 6 is a schematic diagram of the bottom structure of the adjustment mechanism in the present utility model.

[0026] In the figure: 1. hood; 2. base; 3. double door; 4. hydraulic cylinder; 5. translation mechanism; 51. drive motor; 52. driving gear; 53. rack plate; 54. fixed support rod; 55. support platform; 56. ear plate; 6. fixed bracket; 7. bearing base; 71. positioning hole; 8. adjustment mechanism; 81. guide rod; 82. limit slide groove; 83. screw; 84. adjustment support; 85. limit slide block; 86. nut; 9. loading head; 10. pressure sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example:

[0029] like Figures 1 to 6 As shown, a destructive test device for an ultra-long cantilever cap beam comprises a base 2, an adjusting mechanism 8 is arranged inside the base 2, two groups of bearing bases 7 are mounted on the adjusting mechanism 8, fixed brackets 6 are fixedly arranged on both sides of the left and right sides inside the base, a translation mechanism 5 is arranged at the top position between the two groups of fixed brackets 6, a hydraulic cylinder 4 is mounted on the translation mechanism 5, a loading head 9 is fixedly arranged at the output end of the hydraulic cylinder 4, a pressure sensor 10 is embedded in the loading head 9, this design solves the problem that existing detection means are often difficult to accurately simulate the bearing capacity and potential damage mechanism under real working conditions, and it is not convenient to conduct comprehensive destructive tests on ultra-long cantilever cap beams.

[0030] A hood 1 is provided on the upper side of the base 2, and the hood 1 provides a physical protective barrier for the device to prevent the splashing of debris or other unexpected situations that may occur during the test from causing harm to the operator. At the same time, the hood 1 can protect the internal structure from dust, dirt and other external pollutants, thereby ensuring the long-term stable operation of the equipment. A double door 3 is provided on the front side of the hood 1. The design of the double door 3 allows the operator to easily enter the hood 1 to install, debug and maintain the equipment. At the same time, the double door 3 is also convenient for observing the test process and checking the equipment status.

[0031] The translation mechanism 5 includes a fixed support rod 54, a support platform 55 and an ear plate 56. The fixed support rod 54 is provided with two groups and is symmetrically fixed on the front and rear sides between the two groups of fixed brackets 6. A support platform 55 is provided between the two groups of fixed support rods 54. Ear plates 56 are fixed at the four corners of the support platform 55. The ear plates 56 are sleeved on the fixed support rod 54 and slidably connected thereto. The hydraulic cylinder 4 is fixedly installed on the platform. The translation mechanism 5 can drive the hydraulic cylinder 4 to translate between the fixed brackets 6 so as to perform load tests on different parts of the cantilever cap beam.

[0032] A rack plate 53 is laterally arranged on the front side of the hydraulic cylinder 4, and both ends of the rack plate 53 are fixedly connected to the fixed bracket 6. A driving motor 51 is installed on the support platform 55 on the left side of the hydraulic cylinder 4. A driving gear 52 is assembled on the output end of the driving motor 51, and the driving gear 52 is meshed and connected with the rack plate 53. The rack plate 53, the driving motor 51 and the driving gear 52 together constitute the transmission system of the translation mechanism 5, which is convenient for driving the translation mechanism 5 to move. When the driving motor 51 is started, the driving gear 52 will rotate, and through the meshing with the rack plate 53, the rotational motion is converted into the linear motion of the support platform 55 and the hydraulic cylinder 4, thereby realizing the translation of the hydraulic cylinder 4. Through the precise control of the driving motor 51, the translation adjustment of the position of the hydraulic cylinder 4 can be realized, ensuring that the loading head 9 can perform loading tests on different parts of the cantilever cap beam.

[0033] The adjustment mechanism 8 includes a screw 83, an adjustment support 84 and a nut 86. The screw 83 is transversely fixed inside the base, the adjustment support 84 is fixed at the bottom of the bearing base 7, the adjustment support 84 is sleeved on the screw 83 and slidably connected thereto, and the screws 83 on the left and right sides of the adjustment support 84 are both equipped with nuts 86. The adjustment mechanism 8 is provided to facilitate the movement and adjustment of the positions of the two groups of bearing bases 7 to adapt to cantilever cap beams of different lengths and specifications.

[0034] Guide rods 81 are provided on both sides of the screw rod 83, and the adjustment support 84 is movably sleeved on the guide rods 81. The guide rods 81 provide additional support and guidance for the movement of the adjustment support 84, ensuring that the adjustment support 84 will not deflect during the movement, thereby improving the movement stability of the adjustment support 84.

[0035] A T-shaped limiting slider 85 is fixedly arranged at the bottom of the adjustment support 84, and a limiting slide groove 82 for accommodating the limiting slider 85 is provided at the bottom of the base, and the limiting slider 85 is inserted into the limiting slide groove 82. This design plays a limiting guiding role for the adjustment support 84 from the bottom through the limiting slider 85 cooperating with the limiting slide groove 82, further increasing the stability and accuracy of the sliding of the adjustment support 84. At the same time, the limiting slider 85 can provide support for the adjustment support 84 and the bearing base 7 from the bottom to ensure the stability of the cantilever cap beam during the test.

[0036] A plurality of positioning holes 71 for fixing the capping beam are formed inside the bearing base 7. Through the positioning holes 71, fixing elements such as bolts can be used to fix the capping beam, which can ensure the stability of the capping beam on the bearing base 7.

[0037] The working principle of the ultra-long cantilever capping beam destructive test device is as follows: First, a scaled-down model of the ultra-long cantilever capping beam is made. Then, according to the length and specifications of the cantilever capping beam to be tested, the positions of the two bearing bases 7 are adjusted through the adjusting mechanism 8. During this process, loosen the nut 86, then move the movable adjusting support 84 to an appropriate position, and tighten the nut 86 again to fix the bearing base 7. Fix the pier column of the cantilever capping beam on the bearing base 7 through fixing elements, and then start the hydraulic cylinder 4. The hydraulic cylinder 4 drives the loading head 9 to move downward, and applies pressure to the cantilever capping beam through the loading head 9. The pressure sensor 10 embedded inside the loading head 9 monitors the pressure applied to the cantilever capping beam in real time. When signs of damage appear on the cantilever capping beam, the hydraulic cylinder 4 stops loading, and the pressure borne by the cantilever capping beam at this time can be obtained through the pressure sensor 10. After the loading at one test point is completed, start the drive motor 51 to make the driving gear 52 move along the rack plate 53, thereby driving the support platform 55 and the hydraulic cylinder 4 to translate, and move the hydraulic cylinder 4 to the next test point. Repeat the loading test steps until all key parts of the cantilever capping beam have been tested.

[0038] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to enumerate all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A destructive testing device for an ultra-long cantilever cap beam, comprising a base (2), characterized in that: An adjusting mechanism (8) is arranged inside the base (2), two groups of bearing bases (7) are mounted on the adjusting mechanism (8), fixed brackets (6) are fixedly arranged on both left and right sides of the base, a translation mechanism (5) is arranged at the top position between the two groups of fixed brackets (6), a hydraulic cylinder (4) is mounted on the translation mechanism (5), a loading head (9) is fixedly arranged at the output end of the hydraulic cylinder (4), and a pressure sensor (10) is embedded in the loading head (9).

2. The destructive testing device for the super-long cantilever cap beam according to claim 1 is characterized in that: A hood (1) is provided on the upper side of the base (2), and a double door (3) is provided on the front side of the hood (1).

3. The destructive testing device for the super-long cantilever cap beam according to claim 1 is characterized in that: The translation mechanism (5) comprises a fixed support rod (54), a support platform (55) and an ear plate (56). The fixed support rod (54) is provided in two groups and is symmetrically fixed on the front and rear sides between the two groups of fixed brackets (6). A support platform (55) is provided between the two groups of fixed support rods (54). Ear plates (56) are fixed at four corners of the support platform (55). The ear plates (56) are sleeved on the fixed support rod (54) and are slidably connected thereto. The hydraulic cylinder (4) is fixedly mounted on the platform.

4. The destructive testing device for the super-long cantilever cap beam according to claim 3 is characterized in that: A rack plate (53) is laterally arranged at the front side of the hydraulic cylinder (4), and both ends of the rack plate (53) are fixedly connected to a fixed bracket (6). A driving motor (51) is installed on a support platform (55) on the left side of the hydraulic cylinder (4), and a driving gear (52) is mounted on the output end of the driving motor (51), and the driving gear (52) is meshed and transmission-connected with the rack plate (53).

5. The destructive testing device for the super-long cantilever cap beam according to claim 1 is characterized in that: The adjusting mechanism (8) comprises a screw rod (83), an adjusting support (84) and a nut (86); the screw rod (83) is transversely fixed inside the base; the adjusting support (84) is fixed at the bottom of the bearing base (7); the adjusting support (84) is sleeved on the screw rod (83) and slidably connected thereto; the screw rods (83) on the left and right sides of the adjusting support (84) are both equipped with nuts (86).

6. The destructive testing device for the super-long cantilever cap beam according to claim 5 is characterized in that: Guide rods (81) are provided on both the front and rear sides of the screw rod (83), and the adjustment support (84) is movably sleeved on the guide rods (81).

7. The destructive testing device for the super-long cantilever cap beam according to claim 6 is characterized in that: A T-shaped limiting slide block (85) is fixedly provided at the bottom of the adjustment support (84), and a limiting slide groove (82) for accommodating the limiting slide block (85) is provided at the bottom of the base, and the limiting slide block (85) is inserted into the limiting slide groove (82).

8. The destructive testing device for the super-long cantilever cap beam according to claim 1 is characterized in that: The bearing base (7) has multiple groups of cap beams fixed therein.

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