Steel reinforced concrete conversion beam column foot joint with multiple holes

Abstract

The utility model discloses a steel reinforced concrete conversion beam column foot joint with multiple holes, and relates to the technical field of building structures. The node profile steel comprises a steel pipe column lower section and a primary and secondary beam profile steel intersection section, a steel pipe outer side wedge-shaped vertical stiffening plate with a square hole is welded to the outer wall of the steel pipe column lower section, and the long edge direction of the square hole is perpendicular to the extending direction of a longitudinal bar on the upper portion of a steel reinforced concrete beam. Four fan-shaped pouring holes which are uniformly distributed in the circumferential direction and adjacent circular slurry overflow holes are formed in a top flange of the section steel intersection section of the primary and secondary beams; and a long circular hole is formed in the center of an arc-shaped vertical stiffening plate of the intersection section. Cylinder head welding nails are evenly distributed on the outer wall of the lower section of the steel pipe column, the flange surface of the intersection section and the two sides of the rectangular vertical stiffening plates of the intersection section, and the rectangular vertical stiffening plates on the inner side of the steel pipe are welded in a crossed mode. Longitudinal bar arrangement and a concrete flowing path are optimized through the opening design of the stiffening plates, the curvature of the arc-shaped stiffening plates is matched with the outer wall of the steel pipe to enhance constraint, the welding stud array is lifted and combined, and the problems that a traditional joint is insufficient in welding space and poor in concrete compactness are solved.

Description

A steel-concrete transfer beam column base joint with multiple holes Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a steel-concrete transfer beam column base joint with multiple holes. Background Technology

[0002] Traditional steel-concrete composite transfer beam column-foot joints often employ planar stiffening plates. However, the limited welding space in densely packed stiffening plate areas easily leads to unstable weld quality. During concrete pouring in the core area of ​​the steel joint, the stiffening plates obstruct the flow, creating air cavities and reducing density. In existing technologies, the steel-concrete interface often relies on a single weld stud arrangement, resulting in insufficient bond strength. Furthermore, the longitudinal reinforcement of the upper steel section is interrupted by the steel pipe column, disrupting the continuity of force transmission. Some solutions attempt to increase the thickness or number of transverse diaphragms to enhance restraint, but this increases the component's self-weight and has poor adaptability to multi-directional loads. In addition, the mismatch between the flat stiffening plate and the curvature of the steel pipe easily leads to localized stress concentration under dynamic loads, affecting the joint's stiffness and safety. Therefore, there is an urgent need for a steel-concrete composite transfer beam column-foot joint structure that balances welding convenience, concrete fluidity, and multi-directional force transmission efficiency. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a steel-concrete transfer beam column foot joint with multiple holes.

[0004] This utility model provides a steel-concrete transfer beam column base joint with multiple holes, including:

[0005] Lower section of steel pipe column; intersection of main and secondary beam steel sections;

[0006] The lower section of the steel pipe column is welded with a wedge-shaped vertical stiffening plate with a square hole on the outer side of the steel pipe. The long side of the square hole is perpendicular to the extension direction of the upper longitudinal reinforcement of the steel-concrete beam.

[0007] The top flange of the junction section of the main and secondary beam steel section is provided with four fan-shaped pouring holes evenly distributed along the circumference, and multiple circular overflow holes are evenly provided between adjacent fan-shaped pouring holes.

[0008] The intersecting section has an elongated hole extending along its length in the center of the arc-shaped vertical stiffening plate.

[0009] Optionally, cylindrical head weld studs are distributed in a rectangular array on the outer wall of the lower section of the steel pipe column, the outer wall of the top flange of the intersection section, the outer wall of the bottom flange of the intersection section, and both sides of the rectangular vertical stiffening plate of the intersection section, with the row and column spacing of adjacent weld studs being equal.

[0010] Optionally, it also includes a rectangular vertical stiffening plate on the inner side of the steel pipe;

[0011] The rectangular vertical stiffening plates on the inner side of the steel pipe are welded to the inner wall of the lower section of the steel pipe column in a cross shape, and the cross point coincides with the axis of the lower section of the steel pipe column.

[0012] Optionally, vertical stiffening plates are symmetrically welded to both sides of the web end of the intersection section of the main and secondary beam steel sections, and the ends of the intersection section of the main and secondary beam steel sections are welded to the main beam steel and the secondary beam steel.

[0013] Optionally, the radius of curvature of the arc-shaped vertical stiffening plate of the intersection section is consistent with the radius of curvature of the outer wall of the lower section of the steel pipe column.

[0014] Optionally, the width of the square hole is 1.2-1.5 times the diameter of the upper longitudinal reinforcement of the steel-concrete beam, and the length is not less than 5 times the diameter of the longitudinal reinforcement.

[0015] Optionally, it also includes a wedge-shaped vertical stiffening plate on the inner side of the steel pipe;

[0016] The inclined surface of the wedge-shaped vertical stiffening plate on the inner side of the steel pipe forms an angle of 20°-45° with the inner wall of the lower section of the steel pipe column, and the starting section of the inclined surface corresponds to the width of the annular transverse diaphragm on the inner side of the steel pipe, and the distance from the end to the center of the lower section of the steel pipe column is not less than 200mm.

[0017] Optionally, the diameter of the circular overflow holes is 20~30mm, and they are distributed at equal angular intervals along the circumference of the fan-shaped casting holes.

[0018] The embodiments of this utility model have the following technical effects:

[0019] This invention utilizes the square hole design of the wedge-shaped vertical stiffening plate on the outer side of the steel pipe to allow the upper longitudinal reinforcement of the steel-concrete beams on both sides to pass through, avoiding the reinforcement being interrupted by the steel pipe column and ensuring the continuity of force transmission of the longitudinal reinforcement. The fan-shaped pouring hole and the circular overflow hole on the top flange of the steel section where the main and secondary beams meet form a graded venting channel, which, together with the elongated oval hole of the arc-shaped vertical stiffening plate of the meeting section, guides the directional filling of concrete, effectively eliminating air cavities in the core area and improving the density of the concrete pouring. The cross-shaped rectangular stiffening plate and the wedge-shaped stiffening plate on the inner side of the steel pipe form an umbrella-shaped support, dispersing the stress in the node area. The curvature of the arc-shaped vertical stiffening plate of the meeting section is consistent with the outer wall of the steel pipe, realizing the direct transmission of the load of the steel pipe column and enhancing the circumferential constraint. The evenly distributed array of cylindrical head welded studs on the outer wall enhances the bonding strength between the steel and concrete interface through mechanical interlocking, achieving simultaneous optimization of the force transmission efficiency and construction quality of the rigid node. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 is a structural schematic diagram of the cast-in-place rigid column base node in this utility model;

[0022] Figure 2 is a schematic diagram of the internal steel structure of the column base node in this utility model;

[0023] Figure 3 is a schematic diagram of the inner and outer steel plate components of the lower section of the steel pipe column in this utility model.

[0024] Figure 4 is a schematic diagram of the composition of the inner and outer steel plates of the main and secondary beam steel intersection section in this utility model;

[0025] Figure 5 is a schematic diagram of the internal steel profile of the column base node in this utility model;

[0026] Figure 6 is a cross-sectional view of AA in Figure 5;

[0027] Figure 7 is a cross-sectional view of BB in Figure 5;

[0028] Figure 8 is a CC cross-sectional view in Figure 5;

[0029] Figure 9 is a schematic diagram of the arrangement of the upper longitudinal reinforcement of the steel-concrete beam in this utility model.

[0030] Figure 10 is a schematic diagram of the connection between the upper longitudinal reinforcement of the steel-concrete beam, the pier reinforcement and the outer ring transverse diaphragm of the steel pipe in this utility model.

[0031] Figure 11 is a schematic diagram of the arrangement of longitudinal reinforcing bars and annular stirrups in the steel pipe column of this utility model.

[0032] Figure Labels

[0033] 1. Steel pipe column structure; 101. Upper section of steel pipe column; 102. Concrete inside the pipe; 2. Cross-shaped and arc-shaped combined column base node; 201. Lower section of steel pipe column; 202. Wedge-shaped vertical stiffening plate on the outer side of the steel pipe; 203. Rectangular vertical stiffening plate on the inner side of the steel pipe; 204. Wedge-shaped vertical stiffening plate on the inner side of the steel pipe; 205. Annular transverse diaphragm on the outer side of the steel pipe; 2051. Upper annular transverse diaphragm on the outer side of the steel pipe; 2052. Lower annular transverse diaphragm on the outer side of the steel pipe; 206. Annular transverse diaphragm on the inner side of the steel pipe; 2061. Upper annular transverse diaphragm on the inner side of the steel pipe; 2062. Lower annular transverse diaphragm on the inner side of the steel pipe; 207. Intersection of main and secondary beam steel sections; 2071. Web of the intersection section; 2072. Top flange of the intersection section; 20 73. Bottom flange of the junction section; 208. Rectangular vertical stiffening plate of the junction section; 209. Arc-shaped vertical stiffening plate of the junction section; 210. Cylindrical head weld stud; 211. Longitudinal reinforcement of steel pipe column; 212. Circular stirrup of steel pipe column; 213. Pier reinforcement; 214. Mechanical connection sleeve; 215. Concrete pier; 216. Upper longitudinal reinforcement of steel-concrete beam; 217. Square hole; 218. Fan-shaped pouring hole; 219. Circular overflow hole; 220. Oblong hole; 221. Vertical stiffening plate at the end of the junction section; 3. Large-span steel-concrete beam-slab structure; 301. Frame main beam; 302. Frame secondary beam; 303. Reinforced concrete slab; 304. Main beam steel; 305. Secondary beam steel. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] Figure 1-11 is a schematic diagram of a steel-concrete transfer beam column base joint structure with multiple holes provided in an embodiment of this utility model, including:

[0036] The lower section of the steel pipe column is 201, and the intersection section of the main and secondary beam steel is 207.

[0037] The outer wall of the lower section 201 of the steel pipe column is welded with a wedge-shaped vertical stiffening plate 202 with a square hole 217 on the outside of the steel pipe. The long side of the square hole 217 is perpendicular to the extension direction of the upper longitudinal reinforcement 216 of the steel-concrete beam.

[0038] The top flange 2072 of the junction section of the main and secondary beam steel section 207 is provided with four fan-shaped pouring holes 218 evenly distributed along the circumference, and a circular overflow hole 219 is provided between adjacent fan-shaped pouring holes 218.

[0039] The intersecting section has an elongated hole 220 in the center of the arc-shaped vertical stiffening plate 209, which extends along its length.

[0040] First, the structure shown in the attached diagram of this scheme will be explained. The steel pipe column structure 1 may include an upper section 101 of the steel pipe column and concrete 102 inside the pipe, with a bevel reserved at the bottom of the upper section 101 of the steel pipe column. The cross-shaped and arc-shaped combined column foot node 2 includes a lower section 201 of the steel pipe column, a wedge-shaped vertical stiffening plate 202 on the outer side of the steel pipe, a rectangular vertical stiffening plate 203 on the inner side of the steel pipe, a wedge-shaped vertical stiffening plate 204 on the inner side of the steel pipe, an annular transverse diaphragm 205 on the outer side of the steel pipe, an annular transverse diaphragm 206 on the inner side of the steel pipe, a steel section 207 where the main and secondary beams meet, a rectangular vertical stiffening plate 208 on the meeting section, an arc-shaped vertical stiffening plate 209 on the meeting section, a cylindrical head weld stud 210, longitudinal reinforcement of the steel pipe column 211, annular stirrups of the steel pipe column 212, and pier reinforcement 21. 3. Mechanical connection sleeve 214, concrete pier 215, upper longitudinal reinforcement of steel-concrete beam 216, square hole 217, fan-shaped pouring hole 218, circular overflow hole 219, oblong hole 220, vertical stiffening plate at the end of the intersection section 221; the inner annular transverse diaphragm 206 of the steel pipe includes an upper annular transverse diaphragm 2061 and a lower annular transverse diaphragm 2062 on the inner side of the steel pipe; the steel intersection section 207 of the main and secondary beams is composed of the web of the intersection section 2071, the top flange of the intersection section 2072, and the bottom flange of the intersection section 2073. The large-span steel-concrete beam-slab structure 3 includes a frame main beam 301, a frame secondary beam 302, and a reinforced concrete slab 303; in addition, it also includes main beam steel 304 and secondary beam steel 305.

[0041] The lower section 201 of the steel pipe column and the intersection section 207 of the main and secondary beam steel sections form a spatial rigid connection through a multi-directional stiffening system. A wedge-shaped vertical stiffening plate 202 on the outer side of the steel pipe is welded to the outer wall of the steel pipe along the longitudinal axis of the main and secondary beams. Square holes 217 are opened on the surface of the stiffening plate, with the long side of the hole perpendicular to the extension direction of the upper longitudinal reinforcement 216 of the steel-concrete beam, allowing the longitudinal reinforcement to pass through continuously. Four fan-shaped casting holes 218 are evenly distributed circumferentially on the top flange 2072 of the intersection section 207, with circular overflow holes 219 evenly arranged between adjacent holes. The edges of the holes can be chamfered. An arc-shaped vertical stiffening plate 209 of the intersection section is welded along the curvature of the outer wall of the lower section 201 of the steel pipe column, with an elongated hole 220 in the center, the long axis of which is parallel to the axis of the steel pipe. Cylindrical head weld studs 210 are arranged in an array on the outer wall of the lower section 201 of the steel pipe column, the flange surface of the intersection section, and both sides of the rectangular vertical stiffening plate 208 of the intersection section.

[0042] In the construction scenario of the underground space roof slab, the ends of the main frame steel 304 and the secondary frame steel 305 are connected to the intersection section 207 of the main and secondary frame steels through full penetration welds. During concrete pouring, grout is injected into the core area of ​​the node through the fan-shaped pouring hole 218. The elongated hole 220 of the arc-shaped vertical stiffening plate 209 of the intersection section can form an auxiliary flow channel, while gas is discharged from the circular overflow hole 219, ensuring that the concrete filling between the stiffening plates is dense. The array of cylindrical head weld studs 210 reinforces the mechanical interlocking between the steel and the concrete, and the square hole 217 design maintains the continuity of longitudinal reinforcement force transmission. The overall structure realizes the effective transmission of multi-directional loads.

[0043] In some embodiments, cylindrical head weld studs 210 are distributed in a rectangular array on the outer wall of the lower section 201 of the steel pipe column, the outer wall of the top flange 2072 of the intersection section, the outer wall of the bottom flange 2073 of the intersection section, and both sides of the rectangular vertical stiffening plate 208 of the intersection section, with the row and column spacing of adjacent weld studs being equal.

[0044] The rectangular vertical stiffening plate 208 of the confluence section is located between the cross intersections of the cross-shaped and arc-shaped combined column base nodes 2. The outer walls of the lower section 201 of the steel pipe column, the outer walls of the top flange 2072 and bottom flange 2073 of the confluence section, and the cylindrical head weld studs 210 on both sides of the rectangular vertical stiffening plate 208 of the confluence section are arranged in a rectangular array, with the row spacing and column spacing maintaining a proportional relationship. The cylindrical head weld studs 210 enhance the bond strength between the steel and concrete interface through mechanical interlocking, effectively improving the overall load-bearing performance of the combined column base.

[0045] In some embodiments, a rectangular vertical stiffening plate 203 is also included on the inner side of the steel pipe. The rectangular vertical stiffening plate 203 is welded to the inner wall of the lower section 201 of the steel pipe column in a cross shape, and the cross intersection point coincides with the axis of the lower section 201 of the steel pipe column.

[0046] Rectangular vertical stiffening plates 203 are cross-welded to the inner wall of the lower section 201 of the steel pipe column, with the intersection point coinciding with the axis of the steel pipe. After the ends of the stiffening plates are milled flat, they are welded tightly to the inner annular transverse diaphragm 206 to form a grid-like reinforcement system. The cross-shaped structure greatly enhances the bending stiffness of the steel pipe in the column base area and effectively suppresses the angular deformation of the steel pipe.

[0047] In some embodiments, vertical stiffening plates 221 are symmetrically welded to both sides of the end of the web 2071 of the main and secondary beam steel intersection section 207, and the end of the main and secondary beam steel intersection section 207 is welded to the web of the main beam steel 304 and the secondary beam steel 305.

[0048] The web 2071 of the main and secondary beam steel section 207 is symmetrically welded to both sides of the end of the section with vertical stiffening plates 221. The end of the main and secondary beam steel section is fully penetrated welded to the web of the main beam steel 304 and the secondary beam steel 305. The stiffening plate thickness can be gradually designed, with the middle area thickened to withstand the peak bending moment.

[0049] In some implementations, the radius of curvature of the arc-shaped vertical stiffening plate 209 at the intersection is consistent with the radius of curvature of the outer wall of the lower section 201 of the steel pipe column.

[0050] The radius of curvature of the curved vertical stiffening plate 209 at the intersection section is precisely matched with the outer wall of the lower section 201 of the steel pipe column, and it is formed using a CNC bending machine. The two ends of the stiffening plate extend to the surface of the rectangular vertical stiffening plate 208 at the intersection section, forming a continuous connection through bevel welding. The oblong hole 220 is centrally located along the longitudinal direction of the stiffening plate, and the edges of the hole are reinforced by rolling.

[0051] The tight fit between the arc-shaped stiffening plate and the steel pipe wall enhances local stability, and magnetic particle testing is performed on the bevel weld to ensure surface quality.

[0052] In some embodiments, the width of the square hole 217 is 2.0 times the diameter of the upper longitudinal reinforcement 216 of the steel-concrete beam, and the length is not less than 12 times the diameter of the longitudinal reinforcement.

[0053] The width of the square hole 217 is designed to be larger than the diameter of the upper longitudinal reinforcement 216 of the steel-concrete beam, and the long side of the hole is perpendicular to the direction of the longitudinal reinforcement arrangement. The upper longitudinal reinforcement on both sides of the steel-concrete beam passes through the stiffening plate hole by appropriate bending to ensure continuous force transmission. The four corners of the hole can be rounded to reduce stress concentration.

[0054] In some embodiments, a wedge-shaped vertical stiffening plate 204 is also included on the inner side of the steel pipe. The inclined surface of the wedge-shaped vertical stiffening plate 204 forms an angle of 20°-45° with the inner wall of the lower section 201 of the steel pipe column, and the starting section of the inclined surface corresponds to the width of the annular transverse diaphragm 206 on the inner side of the steel pipe, and the distance from the end to the center of the lower section 201 of the steel pipe column is not less than 200mm.

[0055] The inclined surface of the wedge-shaped vertical stiffening plate 204 on the inner side of the steel pipe forms an acute angle with the inner wall of the steel pipe. The range of the angle was determined through welding accessibility testing. An appropriate distance is maintained between the end of the inclined surface and the center of the lower section of the steel pipe column to allow space for welding torch operation.

[0056] The wedge design optimizes the welding operation space. When the diameter of the steel pipe column structure 1 is small, resulting in a tight welding space, the rectangular vertical stiffening plate 203 on the inner side of the steel pipe can also be adjusted to a wedge shape based on the same idea.

[0057] In some embodiments, the diameter of the circular overflow hole 219 is 20~30mm, and they are distributed at equal angles along the circumference of the fan-shaped pouring hole 218.

[0058] The diameter of the circular overflow hole 219 is selected according to conventional structural requirements and is distributed at equal angles along the circumference of the casting hole. The hole positions are arranged to avoid the principal stress transmission path, and the edges are chamfered to reduce flow resistance.

[0059] It should be noted that the terminology used in this utility model is for describing specific embodiments only and is not intended to limit the scope of this application. As shown in this utility model specification, unless the context clearly indicates otherwise, words such as "a," "an," "an," and / or "the" do not specifically refer to the singular and may include the plural. The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, or apparatus. Without further limitations, an element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element.

[0060] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installation," "connection," etc., 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A steel-concrete composite transfer beam column base joint with multiple holes, characterized in that, include: The lower section of the steel pipe column and the intersection section of the main and secondary beam steel sections; the outer wall of the lower section of the steel pipe column is welded with a wedge-shaped vertical stiffening plate with a square hole on the outside of the steel pipe, the long side of the square hole being perpendicular to the extension direction of the upper longitudinal reinforcement of the steel-concrete beam; the top flange of the intersection section of the main and secondary beam steel sections is provided with four fan-shaped pouring holes evenly distributed around the circumference, and multiple circular overflow holes are evenly provided between adjacent fan-shaped pouring holes; the center of the arc-shaped vertical stiffening plate of the intersection section is provided with an elongated hole extending along its length.

2. The node according to claim 1, characterized in that: The outer wall of the lower section of the steel pipe column, the outer wall of the top flange of the intersection section, the outer wall of the bottom flange of the intersection section, and both sides of the rectangular vertical stiffening plate of the intersection section are all provided with cylindrical head weld studs arranged in a rectangular array, with equal spacing between adjacent weld studs.

3. The node according to claim 1, characterized in that, It also includes a rectangular vertical stiffening plate on the inner side of the steel pipe; the rectangular vertical stiffening plate on the inner side of the steel pipe is welded to the inner wall of the lower section of the steel pipe column in a cross shape, and the cross point coincides with the axis of the lower section of the steel pipe column.

4. The node according to claim 1, characterized in that: The web ends of the intersection section of the main and secondary beam steel sections are symmetrically welded with vertical stiffening plates at both ends, and the ends of the intersection section of the main and secondary beam steel sections are welded to the main beam steel and the secondary beam steel.

5. The node according to claim 1, characterized in that: The radius of curvature of the arc-shaped vertical stiffening plate at the intersection is consistent with the radius of curvature of the outer wall of the lower section of the steel pipe column.

6. The node according to claim 1, characterized in that: The width of the square hole is 2.0 times the diameter of the upper longitudinal reinforcement of the steel-concrete beam, and the length is not less than 12 times the diameter of the longitudinal reinforcement.

7. The node according to claim 1, characterized in that, It also includes a wedge-shaped vertical stiffening plate on the inner side of the steel pipe; the inclined surface of the wedge-shaped vertical stiffening plate on the inner side of the steel pipe forms an angle of 20°-45° with the inner wall of the lower section of the steel pipe column, and the starting section of the inclined surface corresponds to the width of the annular transverse diaphragm on the inner side of the steel pipe, and the distance from the end to the center of the lower section of the steel pipe column is not less than 200mm.

8. The node according to claim 1, characterized in that: The diameter of the circular overflow holes is 20~30mm, and they are distributed at equal angles along the circumference of the fan-shaped casting holes.

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