Concrete-filled steel tube void test piece
By introducing air-removing simulation bodies and vibrating parts into steel pipe concrete specimens, the problems of complex structure and high cost in the prior art are solved, and low-cost air-removing simulation and detection are realized, which are suitable for teaching and experiments.
Patent Information
- Application Number
- CN202421642419.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The internal air-removing test specimens of existing steel pipe concrete have complex structures and high cost, making it difficult to meet teaching and experimental needs.
A steel pipe concrete air-removing test piece including steel pipe, air-removing simulation body and vibrating parts is designed. The air-removing simulation body is installed on the inner side wall of the steel pipe. The vibrating part is connected to the power supply to vibrate the dense concrete, with a simple structure and low cost.
It provides a steel pipe concrete air-exhausted test piece with simple structure and low cost, which is suitable for teaching and experiments, simplifying the non-destructive testing method and reducing the testing cost.
Smart Images
Figure CN223192647U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of the production of concrete-filled steel tubes, and particularly relates to a concrete-filled steel tube specimen with voids. Background Technique
[0002] Concrete-filled steel tube refers to a structural member formed by filling concrete in a steel tube, and the steel tube and its core concrete can jointly bear external loads. The combination of the high compressive strength of concrete and the high flexural strength of the steel tube improves the compressive strength of the concrete due to the confining pressure provided by the steel tube to the concrete, making the compressive bearing capacity of the concrete-filled steel tube much better than that of ordinary concrete. Therefore, concrete-filled steel tubes have been widely used in high-rise buildings and long-span bridges and have become important structural foundation. During the construction process, due to the influence of construction technology, raw material quality and construction environment, voids (debonding) often occur between the steel tube and the concrete in the concrete-filled steel tube structure. There are voids between the concrete inside the concrete-filled steel tube and the inner surface of the steel tube. Those with a large void thickness are called voids, and those with a very small gap thickness are generally called debonding. The voids inside the concrete-filled steel tube will cause the confining pressure of the concrete to decrease, thereby reducing the compressive strength of the concrete. In severe cases, it may cause the crushing of the concrete or the buckling of the steel tube itself, and then greatly reduce the bearing capacity of the structure. Therefore, to accurately evaluate the actual bearing capacity of concrete-filled steel tube members with voids, it is crucial to fabricate concrete-filled steel tube specimens that can reflect the actual void situation.
[0003] However, in actual projects, the construction environment of concrete-filled steel tubes is complex and unsafe, and their general volume is very large, making it difficult to meet the requirements of structural cognition and related experimental research. Relevant schools lack corresponding physical objects and thus lack teaching resources. Content of the Utility Model
[0004] The utility model provides a specimen for detecting voids inside a concrete-filled steel tube, aiming to solve the technical problems that the structure of the existing specimen for detecting voids inside a concrete-filled steel tube is complex and the cost is relatively high in the prior art.
[0005] The utility model is achieved through the following technical solutions:
[0006] A concrete-filled steel tube specimen with voids includes:
[0007] A steel tube;
[0008] A void simulation body, installed on the inner side wall of the steel tube;
[0009] Concrete, poured into the steel tube and in contact with the void simulation body;
[0010] A vibrating member, detachably installed on the steel tube, electrically connected to a power source through a circuit, and used for vibrating and compacting the concrete.
[0011] Furthermore, the hollow simulation body is bonded to the inner wall of the steel pipe.
[0012] Furthermore, the hollow simulation body is a structural component made of low-density material.
[0013] Furthermore, the hollow simulation body is a structural member made of waterproof membrane.
[0014] Furthermore, the hollow simulated body is a structural part made of rubber.
[0015] Furthermore, the vibrating member is bonded to the outer side wall of the steel pipe.
[0016] Furthermore, there are multiple vibrating members, and the multiple vibrating members are evenly distributed along the circumferential direction of the steel pipe.
[0017] Furthermore, the vibrating element is a vibration motor.
[0018] Furthermore, the outer side wall of the steel pipe is coated with an anti-rust paint layer.
[0019] Furthermore, the concrete adopts C30 secondary grade.
[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0021] The steel tube concrete de-voided test piece provided by the utility model includes a steel tube, a de-voided simulation body, concrete and a vibrating member. The de-voided simulation body is installed on the inner wall of the steel tube, the concrete is poured in the steel tube and fits with the de-voided simulation body, the vibrating member is detachably installed on the steel tube, the vibrating member is electrically connected to the power supply through a circuit, and the vibrating member is used to vibrate the concrete to make it dense.
[0022] Through the above structure, when making a steel tube concrete depletion test piece, the steel tube is first placed vertically, that is, the axis of the steel tube is perpendicular to the horizontal plane, and then the depletion simulation body is installed on the inner wall of the steel tube to prevent the depletion simulation body from falling off the steel tube, and then concrete is poured into the steel tube, and the vibrating member is connected to the power supply at the same time, so that the vibrating member starts to vibrate, driving the steel tube to vibrate at the same time. Through the setting of the vibrating member, the concrete pouring is made more compact. After the pouring is completed, the vibrating member can be removed. In this way, the steel tube concrete depletion test piece provided by the utility model is composed of only steel tube, depletion simulation body and concrete, with a simpler structure, smaller volume and lower cost. Therefore, the steel tube concrete depletion test piece provided by the utility model is more suitable for teaching or experiments, and is more convenient to master the non-destructive testing method of steel tube concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:
[0024] Figure 1 It is a schematic structural view of a concrete-filled steel tube void specimen provided by an embodiment of the present utility model;
[0025] Figure 2 It is another schematic structural view of a concrete-filled steel tube void specimen provided by an embodiment of the present utility model;
[0026] Figure 3 It is a cross-sectional view of a concrete-filled steel tube void specimen provided by an embodiment of the present utility model;
[0027] Figure 4 It is another cross-sectional view of a concrete-filled steel tube void specimen provided by an embodiment of the present utility model.
[0028] Marks in the drawings and corresponding component names:
[0029] 1 - steel tube, 2 - void simulation body, 3 - concrete, 4 - vibrating member. Specific embodiments
[0030] To make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments of the present utility model and their descriptions are only used to explain the present utility model and do not constitute a limitation to the present utility model.
[0031] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.
[0032] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.
[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "plural" is two or more, unless otherwise specifically defined.
[0034] Embodiment:
[0035] This embodiment provides a steel tube concrete delamination specimen, which is used to solve the technical problems that the structure of the steel tube concrete internal delamination detection specimen in the prior art is complex and the cost is relatively high. The steel tube concrete delamination specimen includes a steel tube 1, a delamination simulation body 2, concrete 3, and a vibrating member 4, where:
[0036] The steel tube 1 has no more than two welds, the service life of the steel tube 1 is long, and the maintenance cost is low.
[0037] The delamination simulation body 2 is installed on the inner side wall of the steel tube 1, and the delamination simulation body 2 is a cuboid with a thickness of 5 mm.
[0038] The concrete 3 is poured into the steel tube 1 and is in contact with the delamination simulation body 2. In this way, through the setting of the delamination simulation body 2 with a certain thickness, a gap is formed between the internal concrete 3 and the inner side wall of the steel tube 1, simulating the delamination condition of the reinforced concrete 3.
[0039] The vibrating member 4 is detachably installed on the steel tube 1. The vibrating member 4 is electrically connected to the power supply through a circuit. The vibrating member 4 is used to vibrate the concrete 3 to make it dense. Optionally, a switch is provided on the circuit connecting the vibrating member 4 and the power supply. This switch is used to control the on and off of the vibrating member 4 and the power supply. This switch can be a wired switch or a wireless switch. In this way, through the detachably installed vibrating member 4, when pouring the concrete 3 into the steel tube 1, the switch is turned on to connect the circuit between the vibrating member 4 and the power supply, so that the vibrating member 4 vibrates the steel tube 1, and further makes the concrete 3 poured more densely; after the concrete 3 is poured, the switch is turned off to cut off the circuit between the vibrating member 4 and the power supply, and then the vibrating member 4 is removed from the steel tube 1. In this way, the weight of the steel tube concrete delamination specimen is reduced, and the removed vibrating member 4 can be installed on the next steel tube concrete delamination specimen for continued use, further reducing the cost.
[0040] Through the above structure, when making a steel tube concrete depletion test piece, the steel tube 1 is first placed vertically, that is, the axis of the steel tube 1 is perpendicular to the horizontal plane, and then the depletion simulation body 2 is installed on the inner wall of the steel tube 1 to prevent the depletion simulation body 2 from falling off the steel tube 1, and then concrete 3 is poured into the steel tube 1, and the vibrator 4 is connected to the power supply at the same time, so that the vibrator 4 starts to vibrate, driving the steel tube 1 to vibrate at the same time. Through the setting of the vibrator 4, the concrete 3 is poured more densely. After the pouring is completed, the vibrator 4 can be removed. In this way, the steel tube concrete depletion test piece provided by the utility model is only composed of the steel tube 1, the depletion simulation body 2 and the concrete 3, and the structure is simpler, the volume is smaller, and the cost is lower. Therefore, the steel tube concrete depletion test piece provided by the utility model is more suitable for teaching or experiments, and it is easier to master the non-destructive testing method of the steel tube 1 concrete 3.
[0041] An optional implementation of this embodiment is as follows: the hollow simulation body 2 is bonded to the inner wall of the steel pipe 1. In this way, the bonded hollow simulation body 2 not only makes it easier to install the hollow simulation body 2, but also prevents the hollow simulation body 2 from moving in the steel pipe 1 when pouring concrete 3.
[0042] An optional implementation of this embodiment is as follows: the hollow simulation body 2 is a structural member made of low-density material. In this way, the hollow simulation body 2 made of low-density material is not only light in weight, low in cost, and environmentally friendly, but also reduces the impact on the detection results.
[0043] Optionally, the hollow simulation body 2 is a structural member made of waterproof membrane. In this way, the steel pipe 1 and the concrete 3 are separated by the provision of the waterproof membrane, and the waterproof membrane can accurately control the layer thickness and is more convenient to use.
[0044] Optionally, the hollow simulation body 2 is a structural member made of rubber, which makes it easier to bond it to the inner wall of the steel pipe 1, making the manufacturing more convenient and quick.
[0045] An optional implementation of this embodiment is as follows: the vibrating member 4 is bonded to the outer wall of the steel pipe 1. In this way, the bonded vibrating member 4 is not only convenient for disassembling and assembling the vibrating member 4, but also does not destroy the integrity of the steel pipe 1, further reducing the impact on the detection results.
[0046] Optionally, there are multiple vibrators 4, and the multiple vibrators 4 are evenly distributed along the circumferential direction of the steel pipe 1. In this way, through the setting of multiple vibrators 4, the concrete 3 is further made denser during pouring, the probability of air holes is reduced, and the accuracy of the detection results is increased.
[0047] Optionally, the vibration member 4 is a vibration motor, which has high energy efficiency and can achieve stepless adjustment, thereby improving flexibility and efficiency, and has low energy consumption, low noise, long service life and low maintenance cost.
[0048] An optional implementation manner of this embodiment is as follows: An anti-rust paint layer is coated on the outer side wall of the steel pipe 1. In this way, through the setting of the anti-rust paint layer, the probability of corrosion of the steel pipe 1 is further reduced, and thus the service life of the concrete-filled steel tube void specimen provided by the embodiment of the present invention is extended.
[0049] An optional implementation manner of this embodiment is as follows: The concrete 3 adopts C30 two-stage grading. In this way, the use of C30 two-stage grading for the concrete 3 saves costs, has low maintenance costs, and is environmentally friendly.
[0050] The specific implementation manners described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific implementation manners of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A hollow steel tube concrete specimen, characterized in that: include: Steel pipe (1); A hollow simulation body (2) is installed on the inner wall of the steel pipe (1); Concrete (3) is poured into the steel pipe (1) and fits in with the hollow simulation body (2); A vibrating member (4) is detachably mounted on the steel pipe (1); the vibrating member (4) is electrically connected to a power source via a circuit; and the vibrating member (4) is used to vibrate and compact the concrete (3).
2. A hollow steel tube concrete test specimen according to claim 1, characterized in that: The hollow simulation body (2) is bonded to the inner side wall of the steel pipe (1).
3. A hollow steel tube concrete test specimen according to claim 2, characterized in that: The hollow simulation body (2) is a structural component made of low-density material.
4. A hollow steel tube concrete test specimen according to claim 3, characterized in that: The hollow simulation body (2) is a structural member made of waterproof coiled material.
5. The hollow steel tube concrete test specimen according to claim 3, characterized in that: The hollow simulation body (2) is a structural member made of rubber.
6. The hollow steel tube concrete test specimen according to claim 1, characterized in that: The vibrating member (4) is bonded to the outer side wall of the steel pipe (1).
7. The hollow concrete-filled steel tube specimen according to claim 6, characterized in that: There are multiple vibrating members (4), and the multiple vibrating members (4) are evenly distributed along the circumferential direction of the steel pipe (1).
8. The hollow concrete-filled steel tube specimen according to claim 7, characterized in that: The vibrating member (4) is a vibration motor.
9. The hollow concrete-filled steel tube specimen according to claim 1, characterized in that: The outer side wall of the steel pipe (1) is coated with an anti-rust paint layer.
10. A hollow concrete-filled steel tube specimen according to any one of claims 1 to 9, characterized in that: The concrete (3) adopts C30 secondary grade.