High-pressure gas buckling restraining component based on embedded structure

Abstract

The invention provides a high-pressure gas buckling restraining component based on an embedded structure. The component comprises an embedded structure arranged in an inner cavity of the steel pipe and an inflation structure. The embedded structure comprises a straight pipe section and a reducing pipe section. The two ends of the straight pipe section extend to form variable-diameter pipe sections with the inner diameters gradually increased. And two ends of the steel pipe are blocked by steel plates. An opening of the reducing pipe section is connected to the plate face of the steel plate, so that an airtight space is formed in the middle of the embedded structure. And the airtight space is filled with high-pressure gas through a built-in or external inflation structure. The embedded structure adopts the reducing section to increase the contact area of gas and the steel plate, so that the pre-internal force generated by the pressure on the component is increased, and the overall pre-stress of the component is increased. After the air pressure is applied, the component is in a tension state before the pressure is applied due to the fact that the pretension force is generated on the component by the pressure intensity. And after being pressed, the spring can counteract the original tensile force and then is converted into a pressed state, so that the spring can bear higher pressure.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a high-pressure gas buckling restraint component based on an embedded structure. Background Art

[0002] The hollow double steel tube concrete column consists of two layers of steel tubes and concrete filled inside. The two layers of steel tubes constrain the internal concrete in the middle to form a hollow tubular structure. The hollow double steel tube concrete column can control the slenderness ratio and cross-sectional development of the column by adjusting the diameter and thickness of the inner and outer layers of steel tubes and the strength of the internal concrete, so as to meet different force requirements. The hollow double steel tube concrete column also has the advantages of simple structure, convenient construction, material saving, and light weight. Therefore, the hollow double steel tube concrete column has been widely used in construction projects and has good development prospects. However, the existing hollow double steel tube concrete column has great disadvantages in actual engineering: when the hollow double steel tube concrete column is under pressure, it is easy to have the defects of local stability destruction and inward bulging of the internal steel tube, which leads to a significant reduction in the bearing capacity of the entire column, or even overall instability and failure.

[0003] Buckling-resistance members are an important structural element in building structures, which can prevent the structure from buckling and failure when subjected to external forces. The working mechanism of buckling-resistance members is to improve the axial compressive bearing capacity of the entire member by gradually increasing the buckling mode order of the inner core yielding section. Buckling-resistance members can achieve compressive yielding and enter the strengthening stage, while playing a role in damage control, protecting the main structure from serious damage in a large earthquake. However, existing buckling-resistance members also have some defects and challenges: in addition to the overall stability, the local stability of the member is equally important. Local instability may cause a part of the member to fail, which in turn affects the performance of the entire structure. The construction and maintenance of buckling-resistance members are also one of the challenges. It is necessary to ensure the integrity and functionality of the member during the construction process, and to detect and repair possible problems in time during the maintenance process. Although buckling-resistance members can improve the seismic performance of the structure, their relatively high cost may limit their application in some projects. Buckling-resistance members need to maintain their performance in long-term use, which requires materials and designs that can resist corrosion, fatigue and other possible degradation mechanisms.

[0004] Therefore, it is of great significance to develop a high-pressure gas buckling restrained component based on an embedded structure. Summary of the invention

[0005] The object of the present invention is to provide a high-pressure gas buckling restraining member based on an embedded structure to solve the problems existing in the prior art.

[0006] The technical solution adopted to achieve the purpose of the present invention is as follows: a high-pressure gas buckling restraining component based on an embedded structure includes an embedded structure arranged in the inner cavity of a steel pipe, and an inflatable structure.

[0007] The embedded structure includes a straight pipe section and a reduced-diameter pipe section. The two ends of the straight pipe section extend to the reduced-diameter pipe section with gradually increasing inner diameters.

[0008] Both ends of the steel pipe are blocked by steel plates. The opening of the reducer is connected to the surface of the steel plate, so that the middle of the embedded structure becomes an airtight space. The airtight space is filled with high-pressure gas through a built-in or external inflatable structure.

[0009] Furthermore, it also includes a stiffening structure, which is a plurality of annular stiffening ribs arranged outside the straight pipe section, and the annular stiffening ribs are connected or in contact with the inner wall of the steel pipe and the outer wall of the straight pipe section.

[0010] Furthermore, the high-pressure gas is air or an inert gas.

[0011] Furthermore, the high-pressure gas is nitrogen.

[0012] Furthermore, the inflatable structure includes an inflatable tube. The inflatable tube penetrates from the outside of the steel pipe into the inside of the straight pipe section. A valve and a pressure gauge are arranged on the pipeline of the inflatable tube. After the high-pressure gas is filled into the inside of the straight pipe section through the inflatable tube, the valve of the inflatable tube is closed.

[0013] Furthermore, the valve is a one-way air pressure valve, which is connected to an air pressure pump.

[0014] The technical effects of the present invention are unquestionable:

[0015] A. The embedded structure uses a variable diameter section to increase the contact area between the gas and the steel plate, thereby increasing the pre-internal force generated by the gas pressure on the component, thereby increasing the overall prestress of the component;

[0016] B. After applying air pressure, the pressure will generate pre-tension on the components, which are in tension before the pressure is applied. After the pressure is applied, the original tension will be offset first, and then it will be transformed into a compression state. The annular stiffening rib can greatly improve the buckling bearing capacity of the inner tube by reducing the calculated length of the inner tube, so the overall structure can withstand greater pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the high-pressure gas buckling restraint member structure based on the embedded structure;

[0018] Figure 2 Schematic diagram of the working process of a high-pressure gas buckling restraint member based on an embedded structure.

[0019] In the figure: steel pipe 1, steel plate 2, inflation pipe 3, straight pipe section 4, diameter-reducing pipe section 5, and annular stiffening rib 6. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0021] Embodiment 1:

[0022] See also Figure 1 This embodiment provides a high-pressure gas buckling restraining component based on an embedded structure, including an embedded structure arranged in the inner cavity of a steel pipe 1, and an inflatable structure.

[0023] The embedded structure includes a straight pipe section 4 and a reduced-diameter pipe section 5. The straight pipe section 4 has two ends extending therefrom to form a reduced-diameter pipe section 5 with a gradually increasing inner diameter.

[0024] Both ends of the steel pipe 1 are blocked by steel plates 2. The opening of the reducer 5 is connected to the surface of the steel plate 2, so that the middle of the embedded structure becomes an airtight space. The airtight space is filled with high-pressure gas through a built-in or external inflatable structure.

[0025] See also Figure 2 The high-pressure gas has a significant effect on the mechanical properties of the high-pressure gas buckling restrained components based on the embedded structure under earthquake and wind loads. The gas pressure gives the components a pre-tension stress, so that the components can withstand greater pressure under compression conditions.

[0026] Embodiment 2:

[0027] The main contents of this embodiment are the same as those of the embodiment 1, wherein it further comprises a stiffening structure. The stiffening structure is a plurality of annular stiffening ribs 6 set outside the straight pipe section 4. The annular stiffening ribs 6 are connected or in contact with the inner wall of the steel pipe 1 and the outer wall of the straight pipe section 4.

[0028] Embodiment 3:

[0029] The main contents of this embodiment are the same as those of embodiment 1 or 2, wherein the high-pressure gas is air or an inert gas. In actual production, the high-pressure gas can be nitrogen.

[0030] Embodiment 4:

[0031] The main content of this embodiment is the same as any one of embodiments 1 to 4, wherein the inflation structure includes an inflation tube 3. The inflation tube 3 penetrates from the outside of the steel pipe 1 into the inside of the straight pipe section 4. A valve and a pressure gauge are provided on the pipeline of the inflation tube 3. After the high-pressure gas is filled into the inside of the straight pipe section 4 through the inflation tube 3, the valve of the inflation tube 3 is closed.

Claims

1. A high-pressure gas buckling restrained component based on an embedded structure, characterized in that: It comprises an embedded structure arranged in the inner cavity of a steel pipe (1), and an inflatable structure; The embedded structure comprises a straight pipe section (4) and a reduced-diameter pipe section (5); the reduced-diameter pipe sections (5) with gradually increasing inner diameters extend from both ends of the straight pipe section (4); Both ends of the steel pipe (1) are blocked by steel plates (2); the opening of the reducer pipe section (5) is connected to the surface of the steel plate (2), so that the middle of the embedded structure becomes an airtight space; the airtight space is filled with high-pressure gas through a built-in or external inflation structure.

2. A high-pressure gas buckling restraining member based on an embedded structure according to claim 1, characterized in that: It also includes a stiffening structure; the stiffening structure is a plurality of annular stiffening ribs (6) arranged outside the straight pipe section (4); the annular stiffening ribs (6) are connected to or in contact with the inner wall of the steel pipe (1) and the outer wall of the straight pipe section (4).

3. A high-pressure gas buckling restraining member based on an embedded structure according to claim 1, characterized in that: The high-pressure gas is air or an inert gas.

4. A high-pressure gas buckling restraining member based on an embedded structure according to claim 3, characterized in that: The high-pressure gas is nitrogen.

5. The high-pressure gas buckling restraining member based on an embedded structure according to claim 1, characterized in that: The inflation structure comprises an inflation pipe (3); the inflation pipe (3) penetrates from the outside of the steel pipe (1) into the inside of the straight pipe section (4); a valve and a pressure gauge are provided on the pipeline of the inflation pipe (3); after high-pressure gas is injected into the inside of the straight pipe section (4) through the inflation pipe (3), the valve of the inflation pipe (3) is closed.

6. A high-pressure gas buckling restraining member based on an embedded structure according to claim 5, characterized in that: The valve is a one-way air pressure valve; the one-way air pressure valve is connected to the air pressure pump.

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