Construction method of steel column base joint

Abstract

This invention belongs to the field of steel structure construction technology and discloses a construction method for steel column base joints, including: setting a support seat on the truss, designing and fabricating a ball joint for later use; connecting the bottom and top ends of the ball joint to the support seat and the steel column base respectively; and fixing the steel column base to the truss with a sealing plate after the truss has deformed. The steel column base joint construction method provided by this invention, by hinged the steel column base and the truss with a ball joint, can effectively release the bending moment in all directions during the construction stage, avoiding excessive additional bending moment at the steel column base joint due to truss deformation during steel structure construction, which could lead to deformation, cracking, or even damage at the connection between the steel column base and the truss. After the truss has deformed, fixing the steel column base to the truss with a sealing plate prevents the ball joint from rotating, thus achieving a rigid connection between the steel column and the truss, effectively ensuring connection strength, and having a simple structure and low construction difficulty.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and in particular to a construction method for steel column base joints. Background Technology

[0002] Compared to traditional concrete buildings, steel structure buildings use steel plates or profiles instead of reinforced concrete, resulting in higher strength, better earthquake resistance, shorter construction time, and increased usable building space. Therefore, they are widely used by engineers in industrial and civil buildings.

[0003] In steel structure construction, steel columns are welded onto horizontal members such as large-span trusses or steel beams. The trusses or beams act as load-bearing structures, while the columns act as vertical force-transmitting members, primarily subjected to vertical compressive stress. During layer-by-layer construction of steel structures, as the upper load gradually increases, the deformation of the trusses or beams also gradually increases. This causes significant deflection at the column base nodes of non-central positions of the trusses or beams due to the deformation, increasing the additional bending moment at the column base nodes and leading to significant deformation or even failure at these nodes. Currently, the common method to address this problem is to significantly thicken and enlarge the cross-section of the column base nodes to increase their bending stiffness. However, this forces adjacent members within a large area to also increase their cross-sections to ensure overall stiffness coordination, resulting in complex construction at the column base nodes, large cross-sections, and the inability to guarantee that significant deformation will not occur at the column base nodes.

[0004] Therefore, there is an urgent need for a construction method for steel column base joints to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for steel column base joints, so as to solve the problems of complex construction of steel column base joints in the prior art and the easy deformation and damage of steel column base joints.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A construction method for steel column base joints includes:

[0008] Step S1: Install support seats on the truss, design and fabricate ball joints, and set them aside;

[0009] Step S2: Connect the bottom and top ends of the ball joint to the support base and the steel column foot respectively;

[0010] Step S3: After the truss has deformed, fix the steel column base to the truss using the sealing plate.

[0011] Preferably, in step S2, before connecting the top end of the ball joint to the base of the steel column, a connecting section is provided at the bottom end of the base of the steel column, the top end of the ball joint is connected to the connecting section, and the cross-sectional area of ​​the connecting section is larger than the cross-sectional area of ​​the steel column.

[0012] Preferably, a connecting section is provided at the bottom end of the steel column base. After the top end of the ball joint is connected to the connecting section, a temporary support is installed to fix the ball joint, the connecting section, and the steel column.

[0013] Preferably, the column base has a variable cross-section, with the bottom cross-sectional area of ​​the column base being equal to the cross-sectional area of ​​the connecting section, and the top cross-sectional area of ​​the column base being equal to the cross-sectional area of ​​the steel column.

[0014] Preferably, the connecting section is a cross-shaped steel column.

[0015] Preferably, the sealing plate is a steel plate. After the truss is deformed, the steel plate is arranged around the circumference of the cross steel column, and the two ends of the steel plate are fixedly connected to the column base of the steel column and the truss, respectively.

[0016] Preferably, the two ends of the steel plate are welded to the column base of the steel column and the truss, respectively.

[0017] Preferably, in step S3, after the steel column base is fixed to the truss by the sealing plate, a rust-proof layer is sprayed on the outer surface of the sealing plate.

[0018] Preferably, the ball joint includes a support and a transition ball head. The support has a groove, the transition ball head is disposed in the groove and rotatably connected to the support, the support is fixedly connected to the connecting section, and the transition ball head is fixed to the support base.

[0019] Preferably, the inner wall of the groove is coated with a lubricating layer.

[0020] The beneficial effects of this invention are:

[0021] The steel column base joint construction method provided in this embodiment connects the steel column base and the truss through a ball joint, realizing the hinged connection between the steel column base and the truss during the construction stage. The ball joint transmits vertical axial pressure and resists shear force, effectively releasing bending moments in all directions during the construction stage. This avoids excessive additional bending moments at the steel column base joint due to truss deformation during the layer-by-layer construction of the steel structure, which could lead to deformation, cracking, or even damage at the connection between the steel column base and the truss. After the truss deformation is completed, the steel column base is fixed to the truss by a sealing plate, preventing the ball joint from rotating and thus achieving a rigid connection between the steel column and the truss. This effectively ensures the connection strength and has a simple structure with low construction difficulty. Attached Figure Description

[0022] Figure 1 This is a flowchart of the construction method for the steel column base node provided in the embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall installation structure of the steel column base node provided in an embodiment of the present invention;

[0024] Figure 3 This is a structural schematic diagram of the steel column base node provided in an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0026] In the picture:

[0027] 100, Truss; 200, Steel column base; 300, Steel column;

[0028] 1. Support base;

[0029] 2. Ball joint; 21. Support; 22. Adapter ball joint;

[0030] 3. Sealing plate; 4. Connecting section. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0035] like Figure 1 and Figure 4 As shown in the figure, this embodiment provides a construction method for steel column base joints, the steps of which include:

[0036] Step S1: Install support seat 1 on truss 100, design and manufacture ball joint 2 for later use.

[0037] Step S2: Connect the bottom and top ends of the ball joint 2 to the support base 1 and the steel column foot 200, respectively.

[0038] Step S3: After the truss 100 has deformed, fix the steel column base 200 to the truss 100 using the sealing plate 3.

[0039] The steel column base node construction method provided in this embodiment connects the steel column base 200 and the truss 100 through a ball joint 2, realizing the hinged connection between the steel column base 200 and the truss 100 during the construction stage. The ball joint 2 transmits vertical axial pressure and resists shear force, effectively releasing bending moments in all directions during the construction stage. This avoids excessive additional bending moments at the steel column base 200 node due to deformation of the truss 100 during the layer-by-layer construction of the steel structure, which could lead to deformation, cracking, or even damage at the connection between the steel column base 200 and the truss 100. After the truss 100 has deformed, the steel column base 200 is fixed to the truss 100 by a sealing plate 3, so that the ball joint 2 no longer rotates, thereby achieving a rigid connection between the steel column 300 and the truss 100. This effectively ensures the connection strength between the components, and the structure is simple and easy to construct.

[0040] Specifically, in step S1, the ball hinge 2 is designed according to parameters such as vertical pressure, horizontal shear force, and theoretical deflection angle during the construction stage. When manufacturing the ball hinge 2, it is designed according to the minimum size under the condition of meeting the load parameters, so as to prevent the ball hinge 2 from being too large and inconvenient to install, and to prevent problems such as inconvenience in connecting the sealing plate 3 with the steel column foot 200 and the sealing plate 3 with the truss 100 due to the ball hinge 2 being too large.

[0041] Optionally, such as Figure 3 As shown, in step S2, before connecting the top of the ball hinge 2 to the steel column base 200, a connecting section 4 is provided at the bottom of the steel column base 200. The top of the ball hinge 2 is connected to the connecting section 4, and the cross-sectional area of ​​the connecting section 4 is larger than the cross-sectional area of ​​the steel column 300. In this embodiment, the truss 100 and the steel column 300 are connected by the ball hinge 2. To ensure the reliability of the connection, the ball hinge 2 needs to be enlarged. This not only ensures that the ball hinge 2 has sufficient strength but also effectively releases bending moment under the large load of the superstructure. Since the cross-sectional area of ​​the ball hinge 2 is larger than that of the steel column 300 after the enlargement, to ensure the connection strength between the steel column 300 and the truss 100, the connecting section 4 is provided, and the cross-sectional area of ​​the connecting section 4 is set to be larger than that of the steel column 300. This ensures a large contact area between the connecting section 4 and the ball hinge 2, and between the connecting section 4 and the steel column base 200, thereby effectively improving the connection strength of the above components.

[0042] Furthermore, in this embodiment, the connecting segment 4 is a cross-shaped steel column. The top of the cross-shaped steel column is welded to the column base 200, and the bottom of the cross-shaped steel column is welded to the ball joint 2, ensuring connection strength. The cross-shaped steel column can also transmit vertical pressure during construction, facilitating the release of bending moments during construction in all directions by the ball joint 2. Furthermore, the column base 200 has a variable cross-section. The bottom cross-sectional area of ​​the column base 200 is equal to the cross-sectional area of ​​the connecting segment 4, and the top cross-sectional area of ​​the column base 200 is equal to the cross-sectional area of ​​the column 300. This improves the support for the column 300 and enhances its load-bearing capacity.

[0043] Optionally, the sealing plate 3 is a steel plate. After the truss 100 has deformed, the steel plate is arranged around the circumference of the cross-shaped steel column, and both ends of the steel plate are fixedly connected to the column base 200 and the truss 100, respectively. This achieves a rigid connection between the column base 200 and the truss 100, thereby preventing deformation of the steel column 300. Since the ball joint 2 in this embodiment is located between the column base 200 and the truss 100, after the two ends of the steel plate are fixedly connected to the column base 200 and the truss 100, the ball joint 2 is enclosed inside the steel plate, thus concealing the ball joint 2. This not only prevents the ball joint 2 from rotating but also improves aesthetics. Furthermore, in this embodiment, both ends of the steel plate are welded to the column base 200 and the truss 100, respectively.

[0044] Optionally, a connecting section 4 is provided at the bottom end of the steel column base 200. After the top end of the ball hinge 2 is connected to the connecting section 4, temporary supports are installed to fix the ball hinge 2, the connecting section 4, and the steel column 300. This temporary support maintains the stability of the ball hinge 2, the connecting section 4, and the steel column 300, reduces the internal forces and deformation of the ball hinge 2, the connecting section 4, and the steel column 300 during installation, and improves the safety and installation accuracy of the ball hinge 2, the connecting section 4, and the steel column 300 during construction.

[0045] Optionally, in step S3, after the steel column base 200 is fixed to the truss 100 by the sealing plate 3, a rust-proof layer is sprayed onto the outer surface of the sealing plate 3. Since the sealing plate 3 in this embodiment is a steel plate, the rust-proof layer effectively isolates the sealing plate 3 from contact with air, and also passivates the steel plate surface, preventing other substances from reacting chemically or electrochemically with the steel plate, thereby preventing rust. Specifically, in this embodiment, the rust-proof layer is rust-proof paint, which is sprayed onto the surface of the steel plate. In other embodiments, the rust-proof layer can also be made of other materials, as long as it can protect the steel plate from corrosion; specific materials are not specifically limited here.

[0046] Optionally, such as Figure 4 As shown, the ball joint 2 in this embodiment includes a support 21 and a transition ball head 22. A groove is formed on the support 21, and the transition ball head 22 is disposed in the groove and rotatably connected to the support 21. The support 21 is fixed to the connecting section 4, and the transition ball head 22 is fixed to the support base 1. Thus, the transition ball head 22 can rotate within the groove, facilitating the release of bending moments during construction in all directions. Furthermore, a lubricating layer is coated on the inner wall of the groove, making the rotation of the transition ball head 22 smoother within the groove. Specifically, in this embodiment, the lubricating layer is silicone grease or oil. In other embodiments, the lubricating layer can be any material that provides lubrication; the specific material is not specifically limited here.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A construction method for steel column base joints, characterized in that, include: Step S1: Install support base (1) on truss (100), design and fabricate ball joint (2) for later use; Step S2: Connect the bottom and top ends of the ball joint (2) to the support base (1) and the steel column base (200) respectively; Step S3: After the truss (100) has deformed, fix the steel column base (200) to the truss (100) using the sealing plate (3); In step S2, before connecting the top end of the ball joint (2) to the steel column base (200), a connecting section (4) is provided at the bottom end of the steel column base (200), and the top end of the ball joint (2) is connected to the connecting section (4), and the cross-sectional area of ​​the connecting section (4) is greater than the cross-sectional area of ​​the steel column (300).

2. The construction method for steel column base joints according to claim 1, characterized in that, A connecting section (4) is provided at the bottom end of the steel column base (200). After the top end of the ball joint (2) is connected to the connecting section (4), a temporary support is installed to fix the ball joint (2), the connecting section (4) and the steel column (300).

3. The construction method for steel column base joints according to claim 1, characterized in that, The steel column base (200) has a variable cross section. The cross-sectional area of ​​the bottom end of the steel column base (200) is equal to the cross-sectional area of ​​the connecting section (4), and the cross-sectional area of ​​the top end of the steel column base (200) is equal to the cross-sectional area of ​​the steel column (300).

4. The construction method for steel column base joints according to claim 1, characterized in that, The connecting section (4) is a cross-shaped steel column.

5. The construction method for steel column base joints according to claim 4, characterized in that, The sealing plate (3) is a steel plate. After the truss (100) is deformed, the steel plate is arranged around the circumference of the cross steel column, and the two ends of the steel plate are fixedly connected to the column foot (200) of the steel column and the truss (100) respectively.

6. The construction method for steel column base joints according to claim 5, characterized in that, The two ends of the steel plate are welded to the column base (200) of the steel column and the truss (100), respectively.

7. The construction method for steel column base joints according to claim 1, characterized in that, In step S3, after the steel column base (200) is fixed to the truss (100) by the sealing plate (3), an anti-rust layer is sprayed on the outer surface of the sealing plate (3).

8. The construction method for steel column base joints according to claim 1, characterized in that, The ball joint (2) includes a support (21) and a transition ball head (22). The support (21) has a groove, and the transition ball head (22) is disposed in the groove and rotatably connected to the support (21). The support (21) is fixedly connected to the connecting section (4), and the transition ball head (22) is fixed to the support base (1).

9. The construction method for steel column base joints according to claim 8, characterized in that, The inner wall of the groove is coated with a lubricating layer.

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