All-welded rigid connection node of steel beam cantilever section

Abstract

This invention discloses a fully welded rigid connection node for a steel beam cantilever section. The entire steel beam is cut to form a mid-span section in the middle and cantilever sections at both ends. The cut surfaces of the mid-span and cantilever sections are beveled, with the upper edge close to the steel column and the lower edge away from the steel column. The end of the cantilever section away from the mid-span is fully welded rigidly to the side of the steel column. Connecting components are tightly fitted and welded inside the cantilever sections. The upper and lower edges of the connecting components extend to the inner sides of the upper and lower flanges of the cantilever section, one end extends to the upper edge of the cut surface of the cantilever section and continues to extend a certain distance towards the steel column, and the other end extends to the lower edge of the cut surface of the cantilever section. Stiffening plates are vertically positioned at the upper and lower edges of the cut surface of the cantilever section and welded to the surrounding components. After the mid-span section is lowered into place, it is supported on the connecting components at both ends and connects with the cantilever sections at both ends, and then welded to the cantilever sections. This invention has good overall load-bearing capacity, requires less time for hoisting equipment, saves construction time, and is convenient, quick, and highly accurate to install.

Description

Technical Field

[0001] This invention relates to the field of building structure design, specifically to a fully welded rigid connection node for a cantilever section of a steel beam. Background Technology

[0002] Steel structures possess advantages such as high strength, light weight, good seismic resistance, good durability, and convenient and quick construction, and are widely used in buildings, railways, bridges, and residences. Steel structures are manufactured from finished steel products, and the quality of the steel itself is guaranteed. Therefore, the quality of a steel structure largely depends on the quality of its joint connections. The design of joint connections in steel structures should be as simple as possible in construction, with clear force distribution, reliable force transmission, and ease of implementation. The principle is that the failure of the joint should not precede the failure of the structural members; that is, strong joints and weak members.

[0003] Currently, beam-column connection nodes are mostly constructed using either fully welded rigid connections or bolted-welded rigid connections. These connections have drawbacks such as long service life of hoisting equipment, installation accuracy being affected by hoisting, and poor overall integrity. Summary of the Invention

[0004] The purpose of this invention is to provide a fully welded rigid connection node for the cantilever section of a steel beam. This invention has good overall stress resistance, short hoisting equipment usage time, saves construction period, and is convenient, quick, and highly accurate to install.

[0005] The technical solution adopted in this invention is:

[0006] A fully welded rigid connection node for a steel beam cantilever section includes a steel column, internal stiffening plates, a steel beam, connecting members, and stiffening plates. The internal stiffening plates are welded to the inner side of the steel column and aligned with the upper and lower flanges of the steel beam. The entire steel beam is cut to form a mid-span section in the middle and cantilever sections at both ends. The cut surfaces of the mid-span section and the cantilever sections are beveled, with the upper edge close to the steel column and the lower edge away from the steel column. The end of the cantilever section away from the mid-span section is fully welded rigidly to the side of the steel column. The connecting members are tightly fitted and welded inside the cantilever sections. The upper and lower edges of the connecting members extend to the inner sides of the upper and lower flanges of the cantilever section, one end extends to the upper edge of the cut surface of the cantilever section and continues to extend a certain distance closer to the steel column, and the other end extends to the lower edge of the cut surface of the cantilever section. The stiffening plates are vertical and correspondingly located at the upper and lower edges of the cut surface of the cantilever section, and are welded to the surrounding members. After the mid-span section is lowered into place, it is supported on the connecting members at both ends and connected to the cantilever sections at both ends, and then connected and welded to the cantilever sections.

[0007] Preferably, the distance between the edge of the cantilever section's cut surface and the edge of the steel column is 500mm or ≥h. b The value of h b This represents the height of the steel beam.

[0008] Preferably, the inclination angle of the cut surface is 55 degrees. 。 ~70 。 .

[0009] Preferably, the distance L1 between the end of the connecting member closest to the steel column and the upper edge of the cut surface of the cantilever section is ≥100mm, and the lateral distance L2 between the upper and lower edges of the cut surface of the cantilever section is determined by the inclination angle of the cut surface and the height h of the steel beam. b Sure.

[0010] Preferably, the steel columns are rectangular steel pipe columns, circular steel pipe columns, or I-shaped steel columns.

[0011] Preferably, the steel beam is a box beam, the connecting components are box-shaped inner lining tubes, the stiffening plate is located inside the box-shaped inner lining tube, the box-shaped inner lining tube is inserted into the box beam, the mid-span section and the cantilever section are welded together by the upper flange, the lower flange and the cut surfaces on both sides, the butt weld of the upper flange and the lower flange is located on the upper side, the butt end of the mid-span section is provided with a welding opening for butt welding of the lower flange, after the butt welding of the lower flange is completed, the welding opening is sealed by welding the opening cover plate.

[0012] Furthermore, before construction, steel columns, internal stiffening plates, steel beams, box-shaped inner lining tubes, and stiffening plates are first processed in the factory. The internal stiffening plates are then welded into the corresponding positions inside the steel columns. The entire steel beam is cut into one mid-span section and two cantilever sections. The end of the cantilever section furthest from the mid-span section is fully welded to the side of the steel column. The stiffening plates are welded into the corresponding positions inside the box-shaped inner lining tubes. The box-shaped inner lining tubes are then inserted into the cantilever sections at the corresponding distance and welded around the inner walls of the cantilever sections. At the joint end of the mid-span section... Cut out welding openings; during on-site hoisting, after the steel columns on both sides of the same span are positioned and installed, the hoisting equipment slowly lowers the mid-span section onto the box-shaped inner liner tube. Once it is placed stably, the mid-span section can be accurately positioned, and then the hoisting equipment withdraws from the work; during on-site welding, the lower flange of the cantilever section and the mid-span section is butt-welded through the welding opening, and then the welding opening is sealed by welding the opening cover plate. Finally, the upper flange of the cantilever section and the mid-span section, as well as the cut surfaces on both sides, are butt-welded.

[0013] Preferably, the steel beam is an I-beam, the connecting members are connecting plates, the connecting plates are attached to both sides of the web of the cantilever section, the stiffening plates are symmetrically located on both sides of the web of the cantilever section, and the mid-span section and the cantilever section are butt-welded by the upper flange and the lower flange.

[0014] Further, before construction, steel columns, internal stiffening plates, steel beams, connecting plates, and stiffening plates are processed in the factory. The internal stiffening plates are welded to the corresponding positions inside the steel columns. The entire steel beam is cut into a mid-span section and two cantilever sections. The end of the cantilever section furthest from the mid-span section is fully welded to the side of the steel column. The connecting plates are attached to the corresponding positions on both sides of the web of the cantilever section. The connecting plates are welded to the web and upper and lower flanges of the cantilever section. The stiffening plates are symmetrically placed at the corresponding positions on both sides of the web of the cantilever section. The stiffening plates are welded to the connecting plates and the upper and lower flanges of the cantilever section. During on-site hoisting, after the steel columns on both sides of the same span are positioned and installed, the hoisting equipment slowly lowers the mid-span section onto the connecting plates. Once it is placed stably, the positioning of the mid-span section is accurately completed, and then the hoisting equipment withdraws from the work. During on-site welding, the connecting plates are welded to the web and upper flange of the mid-span section, and the stiffening plates are welded to the upper flange of the mid-span section. Finally, the upper and lower flanges of the cantilever section and the mid-span section are butt-welded together.

[0015] The beneficial effects of this invention are:

[0016] This invention divides the entire steel beam into a mid-span section and a cantilever section. The connecting component is located in the docking area of ​​the cantilever section. One function of the connecting component is to reinforce the connection between the mid-span section and the cantilever section with stiffening plates, thereby enhancing the overall load-bearing capacity. Another function is to provide temporary stable support for the mid-span section after it is lowered into place, eliminating the need for subsequent hoisting equipment. This reduces the time required for hoisting equipment use and saves construction time. A third function is to achieve precise docking between the mid-span section and the cantilever section by using the cut surface. As the mid-span section is lowered into a certain range, the inclined surfaces on both sides will automatically align with the inclined surfaces on the cantilever section, ultimately landing precisely on the connecting component. This makes installation convenient, quick, and highly accurate. Attached Figure Description

[0017] Figure 1 This is a front view of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 1 of the present invention.

[0018] Figure 2 This is a top view of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 1 of the present invention.

[0019] Figure 3 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 1 of the present invention. Figure 1 .

[0020] Figure 4 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 1 of the present invention. Figure 2 .

[0021] Figure 5 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 1 of the present invention. Figure 3 .

[0022] Figure 6 This is a front view of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 2 of the present invention.

[0023] Figure 7 This is a top view of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 2 of the present invention.

[0024] Figure 8 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 2 of the present invention. Figure 1 .

[0025] Figure 9 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 2 of the present invention. Figure 2 .

[0026] Figure 10 This describes the construction process of the fully welded rigid connection node of the cantilever section of the steel beam in Embodiment 2 of the present invention. Figure 3 .

[0027] In the diagram: 1. Steel column; 2. Column stiffening plate; 3. Cantilever section; 4. Mid-span section; 5. Box-shaped inner liner; 6. Stiffening plate; 7. Butt weld; 8. Welded opening; 9. Opening cover plate; 10. Connecting plate. Detailed Implementation

[0028] To better understand the present invention, it will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] This application provides a fully welded rigid connection node for a cantilever section of a steel beam, such as... Figures 1 to 10 As shown, both Embodiment 1 and Embodiment 2 include a steel column 1, an internal stiffening plate 2, a steel beam, connecting members, and a stiffening plate 6; wherein: the internal stiffening plate 2 is welded to the inside of the steel column 1 and aligned with the upper and lower flanges of the steel beam (they can be aligned with equal thickness or with slightly larger thickness); the entire steel beam is cut to form a mid-span section 4 in the middle and cantilever sections 3 at both ends. The cut surfaces of the mid-span section 4 and the cantilever sections 3 are beveled, with the upper edge close to the steel column 1 and the lower edge away from the steel column 1. The end of the cantilever section 3 away from the mid-span section 4 is fully welded to the side of the steel column 1. The connecting components are tightly fitted and welded inside the cantilever section 3. The upper and lower edges of the connecting components extend to the inner sides of the upper and lower flanges of the cantilever section 3, one end extends to the upper edge of the cut surface of the cantilever section 3 and continues to extend a certain distance towards the steel column 1, and the other end extends to the lower edge of the cut surface of the cantilever section 3. The stiffening plate 6 is vertical and is correspondingly set at the upper and lower edges of the cut surface of the cantilever section 3, and is welded to the surrounding components. After the mid-span section 4 is lowered into place, it is supported on the connecting components at both ends and connected to the cantilever sections 3 at both ends, and then connected and welded to the cantilever section 3.

[0030] To avoid areas with high shear force, the distance between the upper edge of the cut surface of cantilever segment 3 and the side of steel column 1 is set to 500mm or ≥h.b The value of h b This represents the height of the steel beam. To avoid excessive length in cantilever section 3, the inclination angle of the cut surface is 55 degrees. 。 ~70 。 Preferably, the distance L1 between the end of the connecting member near the steel column 1 and the upper edge of the cut surface of the cantilever section 3 is ≥ 100mm, and the lateral distance L2 between the upper and lower edges of the cut surface of the cantilever section 3 is determined by the inclination angle of the cut surface and the height h of the steel beam. b Sure.

[0031] Steel column 1 can be a rectangular steel pipe column, a circular steel pipe column, an I-shaped steel column, or other types.

[0032] This invention divides the entire steel beam into a mid-span section 4 and a cantilever section 3. The connecting component is located in the docking area of ​​the cantilever section 3. One function of the connecting component is to reinforce the connection between the mid-span section 4 and the cantilever section 3 with the stiffening plate 6, thereby enhancing the overall load-bearing capacity. Another function is to provide temporary stable support for the mid-span section 4 after it is lowered into place, eliminating the need for subsequent hoisting equipment. This reduces the time required for hoisting equipment use and saves construction time. A third function is to achieve precise docking between the mid-span section 4 and the cantilever section 3 by cooperating with the cut surface. As the mid-span section 4 is lowered into a certain range, the inclined surfaces on both sides will automatically align with the inclined surfaces on the cantilever section 3, ultimately landing precisely on the connecting component. This makes installation convenient, quick, and highly accurate.

[0033] Example 1

[0034] like Figures 1 to 5 As shown, the steel column 1 is a rectangular steel pipe column, the steel beam is a box beam, the connecting component is a box-shaped inner liner 5, the stiffening plate 6 is located inside the box-shaped inner liner 5, the box-shaped inner liner 5 is inserted into the box beam, the mid-span section 4 and the cantilever section 3 are welded together by the upper flange, the lower flange and the cut surfaces on both sides, the butt weld of the upper flange and the lower flange is located on the upper side, the butt end of the mid-span section 4 is provided with a welding opening 8 for butt welding of the lower flange, after the butt welding of the lower flange is completed, the welding opening 8 is sealed by the opening cover plate 9.

[0035] The construction steps of Example 1 are as follows: Figures 3 to 5As shown: Before construction, steel columns 1, internal stiffening plates 2, steel beams, box-shaped inner lining tubes 5, and stiffening plates 6 are fabricated in the factory. The internal stiffening plates 2 are welded to the corresponding positions inside the steel column 1. The entire steel beam is cut to form a mid-span section 4 and two cantilever sections 3. The end of the cantilever section 3 furthest from the mid-span section 4 is fully welded to the side of the steel column 1. The stiffening plates 6 are welded to the corresponding positions inside the box-shaped inner lining tubes 5. The box-shaped inner lining tubes 5 are then inserted into the cantilever section 3 at the corresponding distance and welded around the inner walls of the cantilever section 3. The connection at the mid-span section 4... The welding opening 8 is cut at the end. During on-site hoisting, after the steel columns 1 on both sides of the same span are positioned and installed, the hoisting equipment slowly lowers the mid-span section 4 onto the box-shaped inner liner 5. Once it is placed stably, the positioning of the mid-span section 4 can be accurately completed, and then the hoisting equipment withdraws from the work. During on-site welding, the lower flange of the cantilever section 3 and the mid-span section 4 is butt-welded through the welding opening 8. Then, the welding opening 8 is sealed by welding the opening cover plate 9. Finally, the upper flange of the cantilever section 3 and the mid-span section 4, as well as the cut surfaces on both sides, are butt-welded. The size of the welding opening 8 is determined according to the actual project. Welding openings 8 can be set on both sides of the mid-span section 4 to reduce the size. The upper and lower flanges of the mid-span section 4 can be cut with slopes to facilitate the construction of the butt weld.

[0036] Example 2

[0037] like Figures 6 to 10 As shown, the steel column 1 is an I-shaped steel column, the steel beam is an I-shaped beam, the connecting component is a connecting plate 10, the connecting plate 10 is attached to both sides of the web of the cantilever section 3, the stiffening plate 6 is symmetrically located on both sides of the web of the cantilever section 3, and the mid-span section 4 and the cantilever section 3 are butt welded together by the upper flange and the lower flange.

[0038] The construction steps of Example 2 are as follows: Figures 8 to 10 As shown: Before construction, steel column 1, internal stiffening plate 2, steel beam, connecting plate 10, and stiffening plate 6 are fabricated in the factory. The internal stiffening plate 2 is welded to the corresponding position inside the steel column 1. The entire steel beam is cut to form a mid-span section 4 and two cantilever sections 3. The end of the cantilever section 3 away from the mid-span section 4 is fully welded to the side of the steel column 1. The connecting plate 10 is attached to the corresponding positions on both sides of the web of the cantilever section 3. The connecting plate 10 is welded to the web and upper and lower flanges of the cantilever section 3. The stiffening plate 6 is symmetrically placed on the corresponding positions on both sides of the web of the cantilever section 3. The stiffening plate 6 is welded to the connecting plate 10 and the upper and lower flanges of the cantilever section 3. During on-site hoisting, after the steel columns 1 on both sides of the same span are positioned and installed, the hoisting equipment slowly lowers the mid-span section 4 onto the connecting plate 10. Once it is placed stably, the positioning of the mid-span section 4 is accurately completed, and then the hoisting equipment withdraws from the work. During on-site welding, the connecting plate 10 is welded to the web and upper flange of the mid-span section 4, and the stiffening plate 6 at the far end is welded to the upper flange of the mid-span section 4. Finally, the butt welding of the upper and lower flanges of the cantilever section 3 and the mid-span section 4 is completed. The upper and lower flanges of the mid-span section 4 can be cut with slopes to facilitate the construction of the butt weld.

[0039] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, 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 this application.

[0040] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A fully welded rigid connection node for a cantilever section of a steel beam, characterized in that: The system includes steel columns, internal stiffening plates, steel beams, connecting members, and stiffening plates. The internal stiffening plates are welded to the inside of the steel columns and aligned with the upper and lower flanges of the steel beams. The entire steel beam is cut to form a mid-span section in the middle and cantilever sections at both ends. The cut surfaces of the mid-span and cantilever sections are beveled, with the upper edge close to the steel column and the lower edge away from the steel column. The end of the cantilever section away from the mid-span section is fully welded to the side of the steel column. The connecting members are tightly fitted and welded inside the cantilever sections. The upper and lower edges of the connecting members extend to the inner sides of the upper and lower flanges of the cantilever section, one end extends to the upper edge of the cut surface of the cantilever section and continues to extend a certain distance closer to the steel column, and the other end extends to the lower edge of the cut surface of the cantilever section. The stiffening plates are vertical and correspondingly located at the upper and lower edges of the cut surface of the cantilever section, and welded to the surrounding components. After the mid-span section is lowered into place, it is supported on the connecting members at both ends and connected to the cantilever sections at both ends, and then welded to the cantilever sections. The steel beam is a box girder, and the connecting components are box-shaped inner lining tubes. The stiffening plate is located inside the box-shaped inner lining tube, and the box-shaped inner lining tube is inserted into the box girder. The mid-span and cantilever sections are welded together by the upper flange, lower flange and the cut surfaces on both sides. The butt weld of the upper flange and lower flange is located on the upper side. The butt end of the mid-span section is provided with a welding opening for butt welding of the lower flange. After the butt welding of the lower flange is completed, the welding opening is sealed by welding the opening cover plate. Before construction, steel columns, internal stiffening plates, steel beams, box-shaped inner lining tubes, and stiffening plates are first processed in the factory. The internal stiffening plates are then welded to the corresponding positions inside the steel columns. The entire steel beam is cut into one mid-span section and two cantilever sections. The end of the cantilever section furthest from the mid-span section is fully welded to the side of the steel column. The stiffening plates are then welded to the corresponding positions inside the box-shaped inner lining tubes. The box-shaped inner lining tubes are then inserted into the cantilever sections at the corresponding distance and welded around the inner walls of the cantilever sections. Welding openings are cut at the butt joints of the mid-span section. During on-site hoisting, after the steel columns on both sides of the same span are positioned and installed, the hoisting equipment slowly lowers the mid-span section onto the box-shaped inner lining tube. Once it is placed stably, the mid-span section is accurately positioned, and then the hoisting equipment withdraws from the work. During on-site welding, the lower flanges of the cantilever sections and the mid-span section are butt-welded through the welding openings. The welding openings are then sealed with welding cover plates. Finally, the upper flanges of the cantilever sections and the mid-span section, as well as the cut surfaces on both sides, are butt-welded.

2. The fully welded rigid connection node for the cantilever section of a steel beam as described in claim 1, characterized in that: The distance between the upper edge of the cantilever segment cutting surface and the edge of the steel column is 500mm or ≥h b h is the height of the steel beam. b h is the height of the steel beam.

3. The fully welded rigid connection node for the cantilever section of the steel beam as described in claim 1, characterized in that: The inclination angle of the cutting surface is 55 。 ~70 。 .

4. The fully welded rigid connection node for the cantilever section of a steel beam as described in claim 1, characterized in that: The distance L1 between the end of the connecting member close to the steel column and the upper edge of the cutting surface of the cantilever section is greater than or equal to 100 mm, and the transverse distance L2 between the upper and lower edges of the cutting surface of the cantilever section is determined by the inclination angle of the cutting surface and the height h of the steel beam b determined.

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