Device for testing radial inclined compressive strength of concrete filled steel tube with circular cross section

Abstract

The utility model provides a circular-section concrete filled steel tube radial inclined compressive strength testing device which comprises an operation table, a first open groove is formed in the operation table, second open grooves are formed in the two ends of the first open groove, two testing bases are fixedly connected to the operation table, testing assemblies are arranged on the testing bases, and the testing assemblies are arranged on the operation table. The test assembly comprises a test block, the test block is oval, the test block is used for applying pressure to the steel pipe in the radial direction, two third open grooves are formed in the end, away from the test base, of the second open groove, and limiting assemblies are slidably connected into the third open grooves. According to the scheme, the oval test block capable of rotating and moving up and down along with the second sliding block is arranged on the operation table, and the rotatable limiting rings are arranged at the two ends of the operation table to limit the concrete filled steel tube, so that when the test block rotates, one end of the long chord applies pressure to the concrete filled steel tube, and the pressure during fracture is measured; therefore, the purpose of improving the test accuracy is achieved.

Description

Technical Field

[0001] This utility model relates to the field of circular cross-section steel tube concrete technology, specifically a radial inclined compressive strength testing device for circular cross-section steel tube concrete. Background Technology

[0002] Concrete-tube steel tubing (CFST) with circular cross-sections is widely used in structures such as bridges and high-rise buildings due to its high load-bearing capacity and good ductility. Radial inclined compression refers to the situation where CFST is subjected to non-perpendicular loads in the radial direction. This situation is not uncommon in actual engineering, especially when the structure is subjected to dynamic loads such as earthquakes and wind loads. The development of radial inclined compressive strength testing equipment is crucial for evaluating the performance of CFST under these conditions.

[0003] For example, a Chinese patent discloses a "Radial Inclined Compressive Strength Testing Device for Circular Cross-Section Steel-Concrete Tubes" (Patent No.: CN103063514B). This patent, covering the field of structural engineering, is characterized by using a combination of a main base, a secondary base, and a roller frame to ensure that the radial inclined load on the steel-concrete tube is in the vertical direction. By applying a simple vertical load to the steel-concrete tube specimen through the loading end and loading rod, the test simulation of the inclined load transmitted from the radial inclined members can be achieved. Furthermore, the design of the arc surface of the secondary base effectively supports the circular cross-section specimen. The aforementioned patent has the advantage of enabling the reusability of the device.

[0004] However, the compressive strength testing device mentioned above relies on the loading end and loading rod to pressurize the circular cross-section steel tube concrete, so its testing accuracy is not high enough. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a radial inclined compressive strength testing device for circular cross-section steel tube concrete, which solves the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a radial inclined compressive strength testing device for circular cross-section steel-concrete pipes, characterized in that: it includes an operating platform, a first slot is formed in the operating platform, and second slots are formed at both ends of the first slot. Two test bases are fixedly connected to the operating platform, and test components are provided on the test bases. The test components include test blocks, which are elliptical in shape and are used to apply radial pressure to the steel pipe. Two third slots are formed at the end of the second slot away from the test base, and limit components are slidably connected in the third slots.

[0009] Preferably, the limiting component includes two first sliders and a limiting ring. The first sliders are slidably connected to the third slot. A fourth slot is provided on the side of the first slider near the second slot. A first rotating shaft is rotatably connected in the fourth slot. The two ends of the limiting ring are respectively fixedly connected to the two first rotating shafts.

[0010] Preferably, the test assembly further includes two second sliders and two electric telescopic rods. Each test base has a fifth slot. The second sliders are slidably connected to the fifth slots. One end of each electric telescopic rod is fixedly connected to one end wall of the fifth slot, and the other end of each electric telescopic rod is fixedly connected to the second slider. A first opening is provided in the test block. A second rotating shaft is fixedly connected in the first opening, and both ends of the second rotating shaft are respectively fixedly connected to the two second sliders.

[0011] Preferably, the inner circular surface of the limiting ring is provided with a chamfer.

[0012] Preferably, the first slot is provided with two cylindrical slots that are inclined to the horizontal plane.

[0013] Preferably, the ratio of the long chord to the short chord of the test block is greater than the ratio of the two chords.

[0014] (III) Beneficial Effects

[0015] This invention provides a test device for radial inclined compressive strength of circular cross-section steel tube concrete.

[0016] It has the following beneficial effects:

[0017] 1. This solution uses an elliptical test block that can rotate and move up and down with the second slider on the operating table, and sets rotatable limiting rings at both ends of the operating table to limit the steel-concrete pipe. When the test block rotates, one end of the long chord applies pressure to the steel-concrete pipe and measures the pressure when it breaks, thereby improving the accuracy of the test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of AA;

[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of BB;

[0022] Figure 5 for Figure 2 A schematic diagram of the cross-sectional structure of CC.

[0023] In the diagram: 11. Operating platform; 12. First slot; 13. Second slot; 14. Third slot; 15. First slider; 16. Fourth slot; 17. First rotating shaft; 18. Limiting ring; 20. Test base; 21. Fifth slot; 22. Second slider; 23. Electric telescopic rod; 24. Second rotating shaft; 25. Test block; 26. First opening. Detailed Implementation

[0024] This utility model provides a test device for radial inclined compressive strength of circular cross-section steel tube concrete, such as... Figure 1-5 As shown, it includes an operating table 11, a first slot 12, a second slot 13, a third slot 14, a first slider 15, a fourth slot 16, a first rotating shaft 17, a limiting ring 18, a test base 20, a fifth slot 21, a second slider 22, an electric telescopic rod 23, a second rotating shaft 24, a test block 25, and a first opening 26.

[0025] like Figure 1-5 As shown, the operating table 11 has a first slot 12, and a second slot 13 is provided at both ends of the first slot 12. Two test bases 20 are fixedly connected to the operating table 11. Test components are provided on the test bases 20. The test components include test blocks 25, which are elliptical in shape. The test blocks 25 are used to apply radial pressure to the steel pipe. Two third slots 14 are provided at the end of the second slot 13 away from the test base 20. Limiting components are slidably connected in the third slots 14. The first slot 12 has two cylindrical slots that are inclined to the horizontal plane. The ratio of the long chord to the short chord of the test block 25 is greater than 4:3. Multiple pressure sensors are integrated on the outer circular surface of the test block 25.

[0026] The limiting component includes two first sliders 15 and a limiting ring 18. The first sliders 15 are slidably connected to the third slot 14. A fourth slot 16 is provided on the side of the first slider 15 near the second slot 13. A first rotating shaft 17 is rotatably connected in the fourth slot 16. The two ends of the limiting ring 18 are respectively fixedly connected to the two first rotating shafts 17. A chamfer is provided on the inner circular surface of the limiting ring 18.

[0027] The test assembly also includes two second sliders 22 and two electric telescopic rods 23. The test base 20 is provided with a fifth slot 21. The second sliders 22 are slidably connected to the fifth slots 21. One end of the electric telescopic rod 23 is fixedly connected to one end wall of the fifth slot 21, and the other end of the electric telescopic rod 23 is fixedly connected to the second slider 22. The test block 25 is provided with a first opening 26. A second rotating shaft 24 is fixedly connected in the first opening 26. The two ends of the second rotating shaft 24 are respectively fixedly connected to the two second sliders 22.

[0028] It is worth noting that the second slider 22 has a built-in drive power supply, which is used to drive the second rotating shaft 24 to rotate. The electric telescopic rod 23 is existing technology.

[0029] When this scheme performs a radial inclined compressive strength test on a circular cross-section steel tube concrete, firstly, the circular cross-section steel tube concrete to be tested is passed through the space between one side limiting ring 18 and the second slot 13 until it passes through the space between the other side limiting ring 18 and the second slot 13, and the drive power supply and electric telescopic rod 23 built into the second slider 22 are activated.

[0030] Then, the electric telescopic rod 23 shortens and drives the second slider 22 to move downwards until the second slider 22 drives the test block 25 to move to the lower limit position of the test block 25, which is close to the circular cross-section steel pipe concrete to be tested, through the second rotating shaft 24. The driving power drives the second rotating shaft 24 to rotate, and the second rotating shaft 24 drives the test block 25 to rotate around the second rotating shaft 24 as the axis. The test block 25 rotates from the direction where the long axis is parallel to the horizontal plane to the direction where the short axis is parallel to the horizontal plane.

[0031] Finally, the pressure sensor on the outer circular surface of the test block 25 synchronously tests the pressure generated by the test block 25 on the circular cross-section steel pipe concrete to be tested, and records the pressure that the circular cross-section steel pipe concrete bears when it breaks.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the radial oblique compressive strength of circular cross-section concrete filled steel tube, characterized in that: The utility model provides an operation platform (11) is included in the operation platform (11) and is seted up first slot (12), both ends of first slot (12) are seted up second slot (13), two test base (20) are fixedly connected on operation platform (11), test assembly is arranged on test base (20), test assembly includes test block (25), test block (25) is oval, test block (25) is used for exerting pressure to steel pipe radially, second slot (13) is seted up third slot (14) in the end away from test base (20), third slot (14) is slidably connected with limiting assembly.

2. The device for testing the radial oblique compressive strength of circular cross-sectioned steel tube filled with concrete according to claim 1, wherein: The limiting assembly includes two first sliding blocks (15) and a limiting ring (18), the first sliding blocks (15) are slidably connected to the third slots (14), fourth slots (16) are formed on one side of the first sliding blocks (15) close to the second slots (13), first shafts (17) are rotatably connected to the fourth slots (16), and the limiting ring (18) is fixedly connected to the two first shafts (17) at both ends.

3. The apparatus for testing the radial oblique compressive strength of circular cross-sectioned concrete-filled steel tube according to claim 2, characterized in that: The test assembly further includes two second sliding blocks (22) and two electric telescopic rods (23), fifth slots (21) are formed in the test base (20), the second sliding blocks (22) are slidably connected to the fifth slots (21), one end of the electric telescopic rods (23) is fixedly connected to an end wall of the fifth slots (21), the other end of the electric telescopic rods (23) is fixedly connected to the second sliding blocks (22), first holes (26) are formed in the test block (25), second shafts (24) are fixedly connected to the first holes (26), and both ends of the second shafts (24) are fixedly connected to the two second sliding blocks (22).

4. The apparatus for testing the radial oblique compressive strength of circular cross-sectioned concrete-filled steel tube according to claim 2, characterized in that: The inner circular surface of the limiting ring (18) is provided with a chamfer.

5. The apparatus for testing the radial tilting compressive strength of circular cross-sectioned steel tube filled with concrete according to claim 1, wherein: The first slot (12) is provided with two cylindrical slots inclined to the horizontal plane.

6. The apparatus for testing the radial tilting compressive strength of circular cross-sectioned steel tube filled with concrete according to claim 1, wherein: The ratio of the long chord to the short chord of the test block (25) is greater than 4:3.

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