A steel column replacement structure and method

Abstract

The present invention discloses a replacement structure and method for a steel column, belonging to the technical field of building structures. The replacement structure comprises: a left half pipe, a right half pipe opposite to the left half pipe, and a stiffening fixing plate; the left half pipe and the right half pipe cooperate with each other and are wrapped around the steel column and then butted into a whole pipe; the stiffening fixing plate is placed along the axial direction of the whole pipe, one end of the stiffening fixing plate in the width direction contacts the horizontal profile of the steel column, and the other end of the stiffening fixing plate in the width direction is fixedly connected to the inner wall of the left half pipe or the right half pipe. By adding a whole pipe to the periphery of the steel column and replacing the original steel column, the purpose of reinforcing the original unsafe structural system is achieved, the safety of the overall structure is ensured, and a solution of direct replacement rather than demolition is adopted, and the replacement structure is used to achieve the same function while quickly replacing the structural force-bearing component form, thereby reinforcing the building (structure).

Description

Technical Field

[0001] The invention belongs to the technical field of building structures, and in particular relates to a steel column replacement structure and method. Background Art

[0002] All buildings (structures) are designed with a clear design service life. When the design service life is reached, if the overall structure is basically intact and still considered to continue to serve, the structure needs to be tested and identified. Or if the building (structure) is improperly managed and maintained during use, the purpose is changed, or it encounters earthquakes, collisions and other loads that exceed the normal design specifications, the structure also needs to be tested and identified to determine the possibility of the building (structure) continuing to serve. After comprehensive evaluation, it will be determined whether it can continue to serve, or serve after reinforcement, or directly consider demolition.

[0003] For the reinforcement of existing buildings (structures), it is not uncommon for conventional reinforcement schemes to fail to ensure the safety of the overall structure. In this case, it is necessary to consider overall demolition. However, temporary supports must be built to demolish the main structure. Due to the limited spatial layout of existing buildings (structures), it may be difficult to build temporary supports, or even impossible to build them, making the reinforcement scheme impossible to implement.

[0004] In view of the above problems, it is urgent to develop a replacement structure and method for steel columns that ensure the safety of the main structure. Summary of the invention

[0005] In order to at least solve the problem that the reinforcement scheme of the building (structure) in the prior art is difficult to implement, the present invention provides the following technical scheme: a replacement structure of a steel column, the replacement structure comprising: a left half pipe, a right half pipe opposite to the left half pipe and a stiffening fixing plate;

[0006] The left half pipe and the right half pipe cooperate with each other, are wrapped around the steel column, and then butt-jointed to form a whole pipe;

[0007] The reinforcing fixing plate is placed along the axial direction of the whole pipe, one end of the reinforcing fixing plate in the width direction contacts the horizontal contour of the steel column, and the other end of the reinforcing fixing plate in the width direction is fixedly connected to the inner wall of the left half pipe or the right half pipe.

[0008] Preferably, one of the stiffening fixing plates is disposed on each side of the steel column.

[0009] Preferably, the steel column is an I-beam column, comprising: an upper flange, a web and a lower flange, one end of the web is fixedly connected to the middle of one side of the upper flange, and the other end of the web is fixedly connected to the middle of one side of the lower flange;

[0010] Two edges on the other side of the upper flange are in contact with the inner wall of the left half tube and the inner wall of the right half tube respectively;

[0011] Two edges on the other side of the lower flange are in contact with the inner wall of the left half tube and the inner wall of the right half tube respectively;

[0012] Both sides of the web are in contact with one end of the stiffening fixing plate in the width direction respectively.

[0013] Preferably, the steel column is an I-beam column, comprising: an upper flange, a web and a lower flange, one end of the web is fixedly connected to the middle of one side of the upper flange, and the other end of the web is fixedly connected to the middle of one side of the lower flange;

[0014] The two edges on the other side of the upper flange are in contact with the inner wall of the left half tube or the inner wall of the right half tube;

[0015] The two edges on the other side of the lower flange are in contact with the inner wall of the right half tube or the inner wall of the left half tube;

[0016] One end of one of the stiffening fixing plates in the width direction is fixedly connected to the middle part of the inner wall of the left half pipe, and the other end contacts any position of the upper flange or the web; another end of the stiffening fixing plate in the width direction is fixedly connected to the middle part of the inner wall of the right half pipe, and the other end contacts any position of the lower flange or the web.

[0017] Preferably, the left half pipe and the right half pipe are both provided with grooves, and the left half pipe and the right half pipe are welded into a whole pipe through the grooves.

[0018] Preferably, the width direction of the stiffening fixing plate is consistent with the radial direction of the whole pipe, and the other end of the stiffening fixing plate is fixedly connected to the midpoint of the inner wall of the left half pipe or the right half pipe.

[0019] Preferably, a plurality of the stiffening fixing plates are arranged at intervals along the axial direction of the steel column.

[0020] The present invention also provides the following technical solution: a method for replacing a structure using any of the above steel columns, the method comprising the following steps:

[0021] Prepare a left half pipe and a right half pipe that can form a whole pipe, wherein a stiffening fixing plate is fixedly connected to the inner wall of the left half pipe and the right half pipe, and the stiffening fixing plate is arranged along the axial direction of the whole pipe;

[0022] The left half pipe is gradually brought closer to the steel column from one side of the steel column, so that the inner wall of the left half pipe and the stiffening fixing plate are in contact with the contour of one side of the steel column in the horizontal direction, and the right half pipe is gradually brought closer to the steel column from the other side of the steel column, so that the inner wall of the right half pipe and the stiffening fixing plate are in contact with the contour of the other side of the steel column in the horizontal direction, and the two ends of the right half pipe and the left half pipe are opposite to each other;

[0023] The opposite ends of the left half pipe and the right half pipe are connected by welding.

[0024] Preferably, the opposite ends of the left half pipe and the right half pipe are connected by groove welding.

[0025] Preferably, the stiffening fixing plate is fixedly connected to the midpoint of the inner wall of the left half pipe and the right half pipe, so that the left half pipe and the right half pipe can be uniquely positioned.

[0026] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0027] The present invention achieves the purpose of reinforcing the original unsafe structural system by adding steel pipes around the steel columns to be reinforced and replacing the original steel columns. When the steel columns are used as the main load-bearing structure and the safety appraisal rating does not meet the standards and significantly affects the bearing capacity, and the conventional reinforcement scheme cannot meet the requirements and the temporary support structure before the overall demolition is difficult to build or cannot be built, the replacement structure can quickly complete the replacement of the structural load-bearing components and complete the reinforcement of the structural system;

[0028] The present invention adopts a solution of direct replacement rather than demolition. This replacement method is different from the direct reinforcement method of reinforcing the components, and does not adopt complex indirect reinforcement methods such as changing the structural system. The original structural components are not removed, and no temporary support structure is built. The on-site implementation process is simple, the construction quality is controllable, and the erection of temporary support structures in confined spaces is avoided, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a top view of a replacement structure of a steel column provided in an embodiment of the present invention;

[0030] In the figure: 1. I-beam column; 101. upper flange; 102. web; 103. lower flange; 2. left half pipe; 3. stiffening fixing plate; 4. right half pipe; 5. groove. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component; it can be a wired electrical connection, a radio connection, or a wireless communication signal connection. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] See also Figure 1 The present invention provides a replacement structure for a steel column, and the replacement structure includes: a left half pipe 2, a right half pipe 4 opposite to the left half pipe 2, and a stiffening fixing plate 3. The left half pipe 2 and the right half pipe 4 cooperate with each other and are wrapped around the steel column and then docked to form a whole pipe. By adding a whole pipe on the periphery of the steel column, the steel column is replaced as a whole, thereby achieving the purpose of strengthening the structural system. The whole pipe mentioned here includes pipes of common shapes such as round pipes and square pipes. The stiffening fixing plate 3 is placed along the axial direction of the whole pipe, one end of the stiffening fixing plate 3 in the width direction contacts the horizontal contour of the steel column, and the other end of the stiffening fixing plate 3 in the width direction is fixedly connected to the inner wall of the left half pipe 2 or the right half pipe 4. That is to say, there are stiffening fixing plates 3 on both sides of the steel column to support, in order to prevent the left half pipe 2 or the right half pipe 4 from rotating to affect the on-site installation, welding, and the closing of the whole pipe.

[0034] A stiffening fixing plate is arranged on both sides of the steel column, that is, one stiffening fixing plate 3 is located between the left half pipe 2 and the steel column, and the other stiffening fixing plate 3 is located between the right half pipe 4 and the steel column, so as to prevent the left half pipe 2 and the right half pipe 4 from rotating.

[0035] Embodiment 1

[0036] Reference Figure 1As shown, the steel column is an I-beam column 1, comprising: an upper flange 101, a web 102 and a lower flange 103, one end of the web 102 is fixedly connected to the middle of one side of the upper flange 101, and the other end of the web 102 is fixedly connected to the middle of one side of the lower flange 103, and the fixed connection here can be welding or a processing method commonly used in the art. The two edges on the other side of the upper flange 101, one edge contacts the inner wall of the left half pipe 2 (the first contact point), and the other edge contacts the inner wall of the right half pipe 4 (the second contact point). The two edges on the other side of the lower flange 103, one edge contacts the inner wall of the left half pipe 2 (the first contact point), and the other edge contacts the inner wall of the right half pipe 4 (the second contact point), that is, the left half pipe 2 and the right half pipe 4 cooperate with each other to wrap the entire I-beam column 1 from the outside, and there are two contact points between the left half pipe 2 and the right half pipe 4 and the steel column. Since there are only two points of contact between the steel column and the left half pipe 2 or the right half pipe 4, the left half pipe 2 and the right half pipe 4 may rotate during installation. According to the principle of triangle stability, the present invention adds a third contact point between the steel column and the left half pipe 2 and between the steel column and the right half pipe 4, so the two sides of the web 102 are respectively in contact with one end of the width direction of the stiffening fixing plate 3, that is, a stiffening fixing plate 3 is placed on each side of the web 102, and the two stiffening fixing plates 3 abut the web 102 (third contact point) from both sides at the same time. By setting the stiffening fixing plates 3, the left half pipe 2 and the right half pipe 4 can be prevented from rotating, which is convenient for installation, welding, and closing of the whole pipe. The whole pipe composed of the left half pipe 2 and the right half pipe 4 cooperates with the stiffening fixing plate 3 to complete the replacement of the I-beam column 1.

[0037] Embodiment 2

[0038] The steel column is an I-beam column 1, comprising: an upper flange 101, a web 102 and a lower flange 103, one end of the web 102 is fixedly connected to the middle part of one side of the upper flange 101, and the other end of the web 102 is fixedly connected to the middle part of one side of the lower flange 103. The fixed connection here can be welding or any commonly used processing method in the field. The two edges on the other side of the upper flange 101 are in contact with the inner wall of the left half pipe 2 or the inner wall of the right half pipe 4, and the two edges on the other side of the lower flange 103 are in contact with the inner wall of the right half pipe 4 or the inner wall of the left half pipe 2 (the first and second contact points). In one case, when the steel column (upper flange 101) and the inner wall of the left half pipe 2 are in two-point contact at the same time, the steel column (lower flange 103) and the inner wall of the right half pipe 4 are also in two-point contact. In another case, when the steel column (upper flange 101) and the inner wall of the right half pipe 4 are in two-point contact, the steel column (lower flange 103) and the inner wall of the left half pipe 2 are also in two-point contact. The contact point positions of these two cases are different, mainly because the left half pipe 2 and the right half pipe 4 are rotated clockwise or counterclockwise, and the purpose is to find a suitable position for welding the left half pipe 2 and the right half pipe 4 together. Although the position of the contact point has changed, the entire I-beam column 1 is wrapped from the outside to achieve the purpose of strengthening the structural system. The disadvantage is that since there are only two points of contact between the steel column and the left half pipe 2 and the right half pipe 4, the left half pipe 2 and the right half pipe 4 will still rotate during installation. According to the principle of triangle stability, the present invention adds a third contact point between the steel column and the left half pipe 2 and between the steel column and the right half pipe 4. Specifically, one end of the stiffening fixing plate 3 on one side of the steel column 1 in the width direction is fixedly connected to the middle part of the inner wall of the left half pipe 2, and the other end of the stiffening fixing plate 3 is in contact with any position of the upper flange 101 or the web 102. One end of the stiffening fixing plate 3 on the other side of the steel column 1 in the width direction is fixedly connected to the middle part of the inner wall of the right half pipe 4, and the other end of the stiffening fixing plate 3 is in contact with any position of the lower flange 103 or the web 102. This is actually the process of installing the steel column after finding the suitable welding points of the left half pipe 2 and the right half pipe 4. The third contact point is achieved through the stiffening fixing plate 3. The position of the stiffening fixing plate 3 changes with the left half pipe 2 or the right half pipe 4. First, the left half pipe 2 and the right half pipe 4 are rotated clockwise or counterclockwise at random according to the position convenient for welding on site, and then the position is finally determined. Then, one end of the two stiffening fixing plates 3 is fixedly led out from the middle of the inner wall of the left half pipe 2 and the right half pipe 4. The other end of one of the stiffening fixing plates 3 contacts any position of the upper flange 101 or the web 102, and the other end of the other stiffening fixing plate 3 contacts any position of the lower flange 103 or the web 102. In this way, the left half pipe 2 and the right half pipe 4 have three contact points with the steel column, which prevents the left half pipe 2 and the right half pipe 4 from rotating, realizes the unique and accurate positioning of the left half pipe 2 and the right half pipe 4, and the three contact points are relatively stable.The whole pipe composed of the left half pipe 2 and the right half pipe 4 cooperates with the stiffening fixing plate 3 to complete the replacement of the I-beam column 1.

[0039] The difference between Example 2 and Example 1 is that in Example 1, one edge of the two edges on the other side of the upper flange 101 contacts the inner wall of the left half tube 2, and the other edge contacts the inner wall of the right half tube 4; one edge of the two edges on the other side of the lower flange 103 contacts the inner wall of the left half tube 2, and the other edge contacts the inner wall of the right half tube 4; and both sides of the web 102 respectively contact one end of the width direction of the stiffening fixing plate 3. In the second embodiment, the two edges on the other side of the upper flange 101 are in contact with the inner wall of the left half pipe 2 or the inner wall of the right half pipe 4; the two edges on the other side of the lower flange 103 are in contact with the inner wall of the right half pipe 4 or the inner wall of the left half pipe 2, one end of a stiffening fixing plate 3 in the width direction is fixedly connected to the middle of the inner wall of the left half pipe 2, and the other end is in contact with any position of the upper flange 101 or the web 102, and one end of another stiffening fixing plate 3 in the width direction is fixedly connected to the middle of the inner wall of the right half pipe 4, and the other end is in contact with any position of the lower flange 103 or the web 102. Due to these differences, the positions of the contact points of the left half pipe 2 and the right half pipe 4 with the steel column have changed, and they are adjusted according to the actual situation, which is convenient for welding the left half pipe 2 and the right half pipe 4 at the construction site, and at the same time, the position of the contact point of the stiffening fixing plate 3 with the steel column is no longer limited to the middle of the web 102, which is more flexible and practical, and is convenient for installation, welding, and whole pipe closing. The second embodiment is equivalent to the first embodiment in that the whole tube is rotated clockwise or counterclockwise.

[0040] In order to replace the original steel column, the original steel column is tightly wrapped, and grooves 5 with matching positions are processed on the left half pipe 2 and the right half pipe 4. The left half pipe 2 and the right half pipe 4 are welded into a whole pipe through the grooves 5.

[0041] Furthermore, the steel column is one of a round steel pipe, a double angle steel, a double channel steel, and a square steel.

[0042] The width direction of the stiffening fixing plate 3 is consistent with the radial direction of the whole pipe, that is, the length end face of the stiffening fixing plate 3 is parallel to the length end face of the whole pipe, that is, the stiffening fixing plate 3 is perpendicular to the inner walls of the left half pipe 2 and the right half pipe 4, and the other end of the stiffening fixing plate 3 is welded at the midpoint of the inner wall of the left half pipe 2 or the right half pipe 4.

[0043] Furthermore, the width of the stiffening plate 3 is equal to the radius of the whole pipe minus half the thickness of the web 102. This is because the width direction of the stiffening plate 3 is consistent with the radial direction of the whole pipe, so the width of the stiffening plate 3 can be obtained by calculation.

[0044] When the length of the steel column is long enough, multiple stiffening fixing plates 3 are arranged at intervals along the axial direction of the steel column. Since the stiffening fixing plates 3 only play a positioning role, even if the positions of the left half pipe 2 and the right half pipe 4 are fixed and do not rotate, they do not need to be arranged through the entire length in height, but can be arranged at intervals. It is recommended to consider arranging one piece at a spacing of 1.5m and a height of 500mm. Multiple stiffening fixing plates 3 can provide uniform support force for the steel column. The replaced steel column needs to be reconnected to the original support, beam and other structures.

[0045] The present invention provides a method for replacing a structure using a steel column, the method comprising the following steps:

[0046] The preparation work before replacement, that is, preparing materials for replacing the steel columns: prepare the left half pipe 2 and the right half pipe 4 that can form a whole pipe, and the inner walls of the left half pipe 2 and the right half pipe 4 are fixedly connected with a stiffening fixing plate 3, the fixed connection here can be welding, and the stiffening fixing plate 3 is arranged along the axial direction of the whole pipe.

[0047] Furthermore, a stiffening fixing plate 3 is fixedly connected to the midpoint of the inner wall of the left half pipe 2 and the right half pipe 4, that is, at this time, the stiffening fixing plate 3 is just perpendicular to the steel column.

[0048] Move the left half pipe 2 gradually closer to the steel column from one side so that the inner wall of the left half pipe 2 and the stiffening fixing plate 3 are in contact with the contour of one side of the steel column in the horizontal direction; move the right half pipe 4 gradually closer to the steel column from the other side of the steel column so that the inner wall of the right half pipe 4 and the stiffening fixing plate 3 are in contact with the contour of the other side of the steel column in the horizontal direction; by moving the positions of the left half pipe 2 with the stiffening fixing plate 3, the right half pipe 4 and the steel column, the two ends of the right half pipe 4 and the left half pipe 2 are butted together to form a whole pipe to wrap the steel column.

[0049] Further connection: the opposite ends of the left half pipe 2 and the right half pipe 4 are connected by welding, specifically, the opposite ends of the left half pipe 2 and the right half pipe 4 are welded into a whole pipe through the groove 5. The whole pipe cooperates with the stiffening fixing plate 3 to replace the steel column.

[0050] Furthermore, a stiffening fixing plate 3 is fixedly connected at the midpoint of the inner wall of the left half pipe 2 and the right half pipe 4. Through the stiffening fixing plate 3, the left half pipe 2 and the right half pipe 4 can be uniquely positioned to avoid rotation, which is convenient for installation and welding, and the whole pipe is closed.

[0051] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A replacement structure for a steel column, characterized in that: The replacement structure comprises: a left half pipe, a right half pipe opposite to the left half pipe and a stiffening fixing plate; The left half pipe and the right half pipe cooperate with each other, are wrapped around the steel column, and then butt-jointed to form a circular whole pipe; The stiffening fixing plate is placed along the axial direction of the whole pipe, one end of the stiffening fixing plate in the width direction is in contact with the horizontal profile of the steel column, and the other end of the stiffening fixing plate in the width direction is fixedly connected to the inner wall of the left half pipe or the right half pipe; A plurality of the reinforcing fixing plates are arranged at intervals along the axial direction of the steel column.

2. A steel column replacement structure according to claim 1, characterized in that: A stiffening fixing plate is respectively arranged on both sides of the steel column.

3. The steel column replacement structure according to claim 1, characterized in that: The steel column is an I-beam column, comprising: an upper flange, a web and a lower flange, one end of the web is fixedly connected to the middle of one side of the upper flange, and the other end of the web is fixedly connected to the middle of one side of the lower flange; Two edges on the other side of the upper flange are in contact with the inner wall of the left half tube and the inner wall of the right half tube respectively; Two edges on the other side of the lower flange are in contact with the inner wall of the left half tube and the inner wall of the right half tube respectively; Both sides of the web are in contact with one end of the stiffening fixing plate in the width direction respectively.

4. A steel column replacement structure according to claim 2, characterized in that: The steel column is an I-beam column, comprising: an upper flange, a web and a lower flange, one end of the web is fixedly connected to the middle of one side of the upper flange, and the other end of the web is fixedly connected to the middle of one side of the lower flange; The two edges on the other side of the upper flange are in contact with the inner wall of the left half tube or the inner wall of the right half tube; The two edges on the other side of the lower flange are in contact with the inner wall of the right half tube or the inner wall of the left half tube; One end of one of the stiffening fixing plates in the width direction is fixedly connected to the middle part of the inner wall of the left half pipe, and the other end contacts any position of the upper flange or the web; another end of the stiffening fixing plate in the width direction is fixedly connected to the middle part of the inner wall of the right half pipe, and the other end contacts any position of the lower flange or the web.

5. The steel column replacement structure according to claim 1, characterized in that: The left half pipe and the right half pipe are both provided with grooves, and the left half pipe and the right half pipe are welded into a whole pipe through the grooves.

6. The steel column replacement structure according to claim 1, characterized in that: The width direction of the stiffening fixing plate is consistent with the radial direction of the whole pipe, and the other end of the stiffening fixing plate is fixedly connected to the midpoint of the inner wall of the left half pipe or the right half pipe.

7. A method for using the replacement structure of the steel column according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Prepare a left half pipe and a right half pipe that can form a whole pipe, wherein a stiffening fixing plate is fixedly connected to the inner wall of the left half pipe and the right half pipe, and the stiffening fixing plate is arranged along the axial direction of the whole pipe; The left half pipe is gradually brought closer to the steel column from one side of the steel column, so that the inner wall of the left half pipe and the stiffening fixing plate are in contact with the contour of one side of the steel column in the horizontal direction, and the right half pipe is gradually brought closer to the steel column from the other side of the steel column, so that the inner wall of the right half pipe and the stiffening fixing plate are in contact with the contour of the other side of the steel column in the horizontal direction, and the two ends of the right half pipe and the left half pipe are opposite to each other; The opposite ends of the left half pipe and the right half pipe are connected by welding.

8. The method according to claim 7, characterized in that The opposite ends of the left half pipe and the right half pipe are connected by groove welding.

9. The method according to claim 7, wherein the reinforcing fixing plate is fixedly connected to the midpoint of the inner wall of the left half pipe and the right half pipe, so that the left half pipe and the right half pipe can be uniquely positioned.

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