H-shaped steel beam-column connection flange node and preparation method

Abstract

The present invention discloses an H-shaped steel beam-column connection flange node and a preparation method. Among them, an H-shaped steel beam-column connection flange node is: the ends of the upper and lower column sections of the H-shaped steel are connected with column end flanges, which are fixedly connected to the node core section by high-strength bolts respectively, and the node core section is connected with a node reinforcement. The column section covered by the node reinforcement and the cavity of the node core section are filled with grouting material. The preparation method includes the following steps: the node core section and the node reinforcement are connected to form a node area assembly; the upper and lower column sections of the H-shaped steel and the node area assembly are connected with high-strength bolts; the web and longitudinal plate of the H-shaped steel column are connected; the H-shaped steel beam and the upper and lower column sections of the H-shaped steel and the node area assembly are connected with high-strength bolts; the column section covered by the node reinforcement and the cavity of the node core section are filled with grouting material. The present invention takes into account the connection of the steel beams in the strong and weak axis directions of the H-shaped steel column at the same time, and is easy to operate and has reliable mechanical properties.

Description

Technical Field

[0001] The invention belongs to the technical field of H-shaped steel beam connection and preparation, and relates to an H-shaped steel beam-column connection flange node and a preparation method. Background Art

[0002] Steel structures are one of the main types of building structures. They primarily consist of components such as beams, steel columns, and steel trusses, made from sections of steel and steel plates. Components are typically connected using welds, bolts, or rivets. Due to their light weight and ease of construction, they are widely used in large factories, stadiums, and high-rise buildings. H-beams have become a widely used type of steel in recent years. Their high cross-sectional modulus, light weight, reduced material consumption, and short construction times can reduce waste of manpower, material, and financial resources. Beam-column joints are core structural components. H-beam cross-sections have strong and weak axes. The presence of an indented area along the weak axis complicates joint connection and limits the mechanical performance of H-beam column joints along the weak axis. Existing H-beam beam-column joints primarily include flange connections and web connections. Flange connections typically utilize high-strength bolts combined with gusset plates, or direct butt welds to the flange plates. Web connections primarily utilize high-strength bolts combined with gusset plates. However, most existing node solutions fail to fully address the limitations of the above-mentioned H-shaped steel beam-column node. Therefore, a convenient and reliable H-shaped steel beam-column node is very necessary. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an H-shaped steel beam-column connection flange node and a preparation method, which can facilitate the connection of steel beams and has a beam-column connection embedded connector node and a preparation method with good bearing capacity and seismic resistance.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an H-shaped steel beam-column connection flange node, including an H-shaped steel upper column section, an H-shaped steel lower column section, and a node core section, the H-shaped steel upper column section, the H-shaped steel lower column section, and the node core section are fixedly connected, the H-shaped steel beam is fixedly connected to the node core section, a node reinforcement is provided in the node core section, a support plate is provided at the lower part of the H-shaped steel lower column section, and the space surrounded by the H-shaped steel upper column section, the H-shaped steel lower column section, the node core section and the support plate is filled with grouting material. The ends of the H-shaped steel upper column section and the H-shaped steel lower column section are both connected to a column end flange plate, the centroid of the H-shaped cross section of the H-shaped steel upper column section and the H-shaped steel lower column section corresponds to the centroid of the column end flange plate, the column end flange plate is a rectangular flat plate, the four corners are provided with inward-concave arc-shaped notches, the middle part is provided with a column end rectangular hole, and the four ends are provided with a double row of column end bolt holes. The node core section is composed of a rectangular cross-section steel pipe and a core section flange. The four vertical surfaces of the rectangular cross-section steel pipe are each provided with a double row of vertical bolt holes. The column end flange is a rectangular flat plate with concave arc-shaped notches at the four corners, a core section rectangular hole in the middle, and double rows of core section bolt holes at the four ends. The node reinforcement is composed of a wing plate and a longitudinal plate. The wing plate and the longitudinal plate are perpendicular to each other. The longitudinal plates are symmetrically connected with shear steel bars. The shear steel bars are arranged in double rows and are perpendicular to the longitudinal plates. The length of the wing plate is the same as the height of the rectangular cross-section steel pipe, and the width is such that the outer edge of the wing plate touches the inner wall of the rectangular cross-section steel pipe. The wing plate and the inner wall of the rectangular cross-section steel pipe are connected and fixed to form a node core section and node reinforcement node area combination. The longitudinal plate is provided with a slot longitudinally from both ends to the center. The width of the slot is the same as the thickness of the H-shaped steel column web, and the length ends at the outer edge of the wing plate. The H-shaped steel column web is connected and fixed to the slot. One end of the H-shaped steel beam is connected to an end plate, the upper and lower bottom edges of the end plate are flush with the H-shaped steel beam flange, the end plate is provided with double rows of end plate bolt holes, and the H-shaped steel beam flange is provided with double rows of flange bolt holes.

[0005] The H-shaped steel beam or H-shaped steel column is a connecting or hot-rolled H-shaped steel.

[0006] The high-strength bolts are large hexagonal high-strength bolts or torsion shear type high-strength bolts.

[0007] The flange is a cast or machined flange.

[0008] The present invention also provides a method for preparing an H-shaped steel beam-column connection flange node, which is characterized by comprising the following steps:

[0009] Step 1: Open holes on the column end flange and the core segment flange: open a column end rectangular hole and a core segment rectangular hole of equal size at the center of the column end flange and the core segment flange, and open double rows of column end bolt holes and core segment bolt holes at the same position at the four ends of the column end flange and the core segment flange;

[0010] Step 2: Opening holes on the rectangular cross-section steel pipe and the end plate: opening double rows of vertical bolt holes and end plate bolt holes at the same positions of the rectangular cross-section steel pipe and the end plate respectively;

[0011] Step 3, assembling the H-beam upper column section, H-beam lower column section, and node core section: respectively connect the two column end flanges to the ends of the two H-beam columns to form two identical assemblies, with the column end flanges perpendicular to the H-beam columns. One of the assemblies is the H-beam upper column section, and the support plate is connected in the U-shaped groove surrounded by the H-beam column web and H-beam column flange of the other assembly to form the H-beam lower column section;

[0012] Step 4, assembling the node core segment: connecting two core segment flanges to the two ends of the rectangular cross-section steel pipe respectively, with the core segment flanges being perpendicular to the rectangular cross-section steel pipe;

[0013] Step 5, connecting an end plate to the H-shaped steel beam: connecting the end plate to the end of the H-shaped steel beam, with the end plate being perpendicular to the H-shaped steel beam and the centroid of the end plate coinciding with the cross-sectional centroid of the H-shaped steel beam;

[0014] Step 6, assemble the node reinforcement: open a slot at the center line position at both ends of the longitudinal plate, vertically connect shear steel bars at both ends of the longitudinal plate, the shear steel bars are arranged in double rows with the vertical center line of the longitudinal plate as the symmetry axis, and vertically connect the wing plate in the middle of the longitudinal plate. The wing plate consists of two pieces and are arranged symmetrically along the longitudinal plate.

[0015] Step 7, assembling the node core section and the node reinforcement to form a node area assembly: inserting the node reinforcement into the node core section, and vertically connecting the wing plate and the longitudinal plate to the inner wall of the rectangular cross-section steel pipe respectively.

[0016] Step 8, fix the H-shaped steel upper column section, H-shaped steel lower column section and node area assembly: insert the H-shaped steel column webs of the H-shaped steel upper column section and H-shaped steel lower column section into the slots respectively, so that the column end flange and the core section flange projection overlap and the contact surface fits tightly, and the H-shaped steel column web is connected to the longitudinal plate.

[0017] Step 9, fix the H-shaped steel upper column section, H-shaped steel lower column section, node core section and H-shaped steel beam: high-strength bolts are passed through the flange bolt holes, core section bolt holes, column end bolt holes in sequence to fix the H-shaped steel beam, H-shaped steel upper column section, H-shaped steel lower column section and node core section; high-strength bolts are passed through the facade bolt holes and end plate bolt holes in sequence to fix the H-shaped steel beam and node core section.

[0018] Step 10, filling grouting material: fill the grouting material into the rectangular area surrounded by the H-shaped steel upper column section, the H-shaped steel lower column section, the node core section and the support plate, so that the grouting material covers the shear steel bars but does not exceed the outer edge of the H-shaped steel column flange.

[0019] Compared with the existing H-shaped steel beam-column joint, the present invention has the following advantages:

[0020] First, the flange node can simultaneously take into account the connection of steel beams in the strong axis direction and the weak axis direction. The core welding work can be completed on the ground, avoiding the barrier of high-altitude welding that is difficult to ensure reliability;

[0021] Second, the flange node balances the difference in stiffness between the weak axis and strong axis of the H-shaped steel column to a certain extent through the node reinforcement, thereby improving the bearing capacity and seismic performance of the node in the weak axis direction;

[0022] Third, pouring grouting materials into the node area assembly can further improve the bearing capacity of the node area and enhance the energy consumption capacity of the node. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples:

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the upper column section of the H-shaped steel of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the lower column section of the H-shaped steel of the present invention.

[0027] Figure 4 Schematic diagram of the structure of the node core segment of the present invention.

[0028] Figure 5 Schematic diagram of the structure of the node reinforcement of the present invention.

[0029] Figure 6 Schematic diagram of the node connection structure of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the H-shaped steel beam of the present invention.

[0031] In the figure: 1—H-steel upper column section; 2—H-steel lower column section; 21—support plate; 3—node core section; 31—rectangular cross-section steel pipe; 311—vertical bolt hole; 32—core section flange; 321—core section rectangular hole; 322—core section bolt hole; 4—H-steel beam; 41—end plate; 411—end plate bolt hole; 42—H-steel beam flange; 421—flange bolt hole; 5—node reinforcement; 51—flange plate; 52—longitudinal plate; 521—slot; 522—shear reinforcement; 6—grouting material; 7—column end flange; 71—column end rectangular hole; 72—column end bolt hole; 8—H-steel column web; 9—H-steel column flange. DETAILED DESCRIPTION

[0032] like Figures 1 to 7In the invention, a method for preparing an H-shaped steel beam-column connection flange node is provided, wherein the H-shaped steel upper column section 1 and the H-shaped steel lower column section 2 are composed of an H-shaped steel column web 8 and an H-shaped steel column flange 9. Column end flanges 7 are connected to the ends of the H-shaped steel upper column section 1 and the H-shaped steel lower column section 2, and the centroid of the H-shaped cross section of the H-shaped steel upper column section 1 and the H-shaped steel lower column section 2 corresponds to the centroid of the column end flange 7. The column end flange 7 is a rectangular flat plate with concave arc notches at the four corners, and a rounded transition between the two mutually perpendicular limbs. A column end rectangular hole 71 is provided in the middle of the column end flange 7, and the size of the column end rectangular hole 71 is the same as the outer size of the cross-sectional projection of the H-shaped steel upper column section 1 and the H-shaped steel lower column section 2. Double rows of column end bolt holes 72 are provided at the four ends of the column end flange 7, and the bolt holes are symmetrical with the center line of the column end flange 7 as the symmetry axis. The node core section 3 is composed of a rectangular steel tube 31 connected to a core flange 32. Each of the four vertical surfaces of the rectangular steel tube 31 is provided with a double row of vertical bolt holes 311, symmetrically arranged about the vertical centerline of the rectangular steel tube 31. The core flange 32 is the same shape as the column end flange 7. A core rectangular hole 321 is defined in the center of the core flange 32, and its dimensions are the same as the column end rectangular hole 71. The four extremities of the core flange 32 are provided with a double row of core bolt holes 322, corresponding one-to-one with the column end bolt holes 72. The node reinforcement 5 is composed of a flange 51 connected to a longitudinal plate 52. The flange 51 and longitudinal plate 52 are perpendicular to each other. Shear reinforcement bars 522 are symmetrically connected to the longitudinal plate 52, arranged in double rows and perpendicular to the longitudinal plate 52. The length of the shear reinforcement bars 522 does not exceed the width of the flange 51. The length of the flange 51 is the same as the height of the rectangular cross-section steel tube 31, and the width is such that the outer edge of the flange 52 touches the inner wall of the rectangular cross-section steel tube 31. The flange 52 is fixedly connected to the inner wall of the rectangular cross-section steel tube 31 to form the node core section 3 and the node reinforcement 5 node area combination. The longitudinal plate 52 is provided with a slot 521 along the longitudinal direction from both ends to the center. The width of the slot 521 is the same as the thickness of the H-shaped steel column web 8, and the length ends at the outer edge of the flange 51. The H-shaped steel column web 8 is fixedly connected to the slot 521 by spot welding. One end of the H-shaped steel beam 4 is connected to the end plate 41. The upper and lower bottom edges of the end plate 41 are flush with the H-shaped steel beam flange 42. The end plate 41 is provided with a double row of end plate bolt holes 411, and the H-shaped steel beam flange 42 is provided with a double row of flange bolt holes 421.

[0033] The specific preparation method of the above-mentioned H-shaped steel beam-column connection flange node includes the following steps:

[0034] Step 1: Open holes on the column end flange 7 and the core section flange 32: open a column end rectangular hole 71 and a core section rectangular hole 321 at the center of the column end flange 7 and the core section flange 32, respectively. The column end rectangular hole 71 and the core section rectangular hole 321 are of equal size and have the same outer dimensions as the outer dimensions of the cross-sectional projection of the H-shaped steel upper column section 1 and the H-shaped steel lower column section 2. Open double rows of column end bolt holes 72 and core section bolt holes 322 at the same positions at the four ends of the column end flange 7 and the core section flange 32;

[0035] Step 2: Open holes on the rectangular cross-section steel tube 31 and the end plate 41: open double rows of vertical bolt holes 311 and end plate bolt holes 411 at the same positions of the rectangular cross-section steel tube 31 and the end plate 41 respectively;

[0036] Step 3, assembling the H-beam upper column section 1, the H-beam lower column section 2, and the node core section 3: respectively connect the two column end flanges 7 to the ends of the two H-beam columns to form two identical assemblies, the column end flanges 7 are perpendicular to the H-beam columns, and the symmetry axis of the column end flanges 7 coincides with the symmetry axis of the cross-section of the H-beam column. One of the assemblies is the H-beam upper column section 1, and the support plate 21 is connected to the U-shaped groove surrounded by the H-beam column web 8 and the H-beam column flange 9 of the other assembly to form the H-beam lower column section 2;

[0037] Step 4, assembling the node core segment 3: connect the two core segment flanges 32 to the two ends of the rectangular cross-section steel pipe 31 respectively, with the core segment flanges 32 perpendicular to the rectangular cross-section steel pipe 31, and the symmetry axis of the core segment flanges 32 coincident with the cross-sectional symmetry axis of the rectangular cross-section steel pipe 31;

[0038] Step 5, connecting the end plate 41 to the H-shaped steel beam 4: connect the end plate 41 to the end of the H-shaped steel beam 4, the end plate 41 is perpendicular to the H-shaped steel beam 4, and the symmetry axis of the end plate 41 coincides with the symmetry axis of the H-shaped steel beam 4;

[0039] Step 6, assembling the node reinforcement 5: opening a slot 521 at the centerline of both ends of the longitudinal plate 52, vertically connecting shear reinforcement bars 522 at both ends of the longitudinal plate 52, and arranging the shear reinforcement bars 522 in two rows with the vertical centerline of the longitudinal plate 52 as the axis of symmetry. Vertically connecting the wing plate 51 in the middle of the longitudinal plate 52, the wing plate 51 consists of two pieces and is symmetrically arranged along the longitudinal plate 52;

[0040] Step 7: Assemble the node core segment 3 and the node reinforcement 5 to form a node area assembly: insert the node reinforcement 5 into the node core segment 3, so that the centroid of the core segment rectangular hole 321 coincides with the centroid of the longitudinal section of the node reinforcement 5, and the wing plate 51 and the longitudinal plate 52 are respectively connected perpendicularly to the inner wall of the rectangular cross-section steel pipe 31;

[0041] Step 8: Fix the H-beam upper column section 1, the H-beam lower column section 2, and the node area assembly: insert the H-beam column webs 8 of the H-beam upper column section 1 and the H-beam lower column section 2 into the slots 521, respectively, so that the column end flanges 7 and the core section flanges 32 overlap and the contact surfaces are tightly fitted, and the H-beam column webs 8 are connected to the longitudinal plates 52.

[0042] Step 9: Fix the H-shaped steel upper column section 1, the H-shaped steel lower column section 2, the node core section 3, and the H-shaped steel beam 4: Pass high-strength bolts through the flange bolt holes 421, the core section bolt holes 322, and the column end bolt holes 72 to fix the H-shaped steel beam 4, the H-shaped steel upper column section 1, the H-shaped steel lower column section 2, and the node core section 3. Pass high-strength bolts through the facade bolt holes 311 and the end plate bolt holes 411 to fix the H-shaped steel beam 4 and the node core section 3.

[0043] Step 10, filling grouting material 6: fill the grouting material 6 into the rectangular area surrounded by the H-shaped steel upper column section 1, the H-shaped steel lower column section 2, the node core section 3 and the support plate 21, so that the grouting material 6 covers the shear steel bars 522 but does not exceed the outer edge of the H-shaped steel column flange 9.

[0044] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An H-shaped steel beam-column connection flange node, comprising an H-shaped steel upper column section (1), an H-shaped steel lower column section (2), and a node core section (3), characterized in that: The H-shaped steel upper column section (1), the H-shaped steel lower column section (2), and the node core section (3) are fixedly connected, the H-shaped steel beam (4) is fixedly connected to the node core section (3), a node reinforcement member (5) is provided in the node core section (3), a support plate (21) is provided at the lower part of the H-shaped steel lower column section (2), and a space enclosed by the H-shaped steel upper column section (1), the H-shaped steel lower column section (2), the node core section (3), and the support plate (21) is filled with grouting material (6); The node core segment (3) is composed of a rectangular cross-section steel pipe (31) and a core segment flange (32) connected together. The four vertical surfaces of the rectangular cross-section steel pipe (31) are provided with vertical bolt holes (311) arranged in double rows. The core segment flange (32) is a rectangular flat plate with concave arc-shaped notches at the four corners, a core segment rectangular hole (321) opened in the middle, and core segment bolt holes (322) arranged in double rows opened at the four ends. The node reinforcement (5) is composed of a wing plate (51) and a longitudinal plate (52) connected together, the wing plate (51) and the longitudinal plate (52) are perpendicular to each other, the longitudinal plate (52) is symmetrically connected with shear steel bars (522), and the shear steel bars (522) are arranged in double rows and are perpendicular to the longitudinal plate (52); The length of the wing plate (51) is the same as the height of the rectangular cross-section steel tube (31), and the width is such that the outer edge of the wing plate (52) touches the inner wall of the rectangular cross-section steel tube (31). The wing plate (52) and the inner wall of the rectangular cross-section steel tube (31) are connected and fixed to form a node core section (3) and a node reinforcement member (5) node area combination. The longitudinal plate (52) is provided with a card slot (521) along the longitudinal direction from both ends to the center. The width of the card slot (521) is the same as the thickness of the H-shaped steel column web (8), and the length ends at the outer edge of the wing plate (51). The H-shaped steel column web (8) is connected and fixed to the card slot (521).

2. The H-shaped steel beam-column connection flange node according to claim 1, characterized in that: The ends of the H-shaped steel upper column section (1) and the H-shaped steel lower column section (2) are both connected to a column end flange (7), and the centroid of the H-shaped cross section of the H-shaped steel upper column section (1) and the H-shaped steel lower column section (2) corresponds to the centroid of the column end flange (7). The column end flange (7) is a rectangular flat plate with concave arc-shaped notches at the four corners, a column end rectangular hole (71) in the middle, and column end bolt holes (72) arranged in double rows at the four ends.

3. The H-shaped steel beam-column connection flange node according to claim 1, characterized in that: One end of the H-shaped steel beam (4) is connected to an end plate (41), the upper and lower bottom edges of the end plate (41) are flush with the H-shaped steel beam flange (42), the end plate (41) is provided with end plate bolt holes (411) arranged in a double row, and the H-shaped steel beam flange (42) is provided with flange bolt holes (421) arranged in a double row.

4. The method for preparing an H-shaped steel beam-column connection flange node according to any one of claims 1 to 3, characterized in that The following steps are involved: Step 1) holes are opened on the column end flange (7) and the core section flange (32): equal-sized column end rectangular holes (71) and core section rectangular holes (321) are opened at the center of the column end flange (7) and the core section flange (32), and double-row column end bolt holes (72) and core section bolt holes (322) are opened at the same positions of the four ends of the column end flange (7) and the core section flange (32); Step 2) holes are opened on the rectangular cross-section steel tube (31) and the end plate (41): double-row vertical bolt holes (311) and end plate bolt holes (411) are opened at the same positions of the rectangular cross-section steel tube (31) and the end plate (41); Step 3), assembling the H-shaped steel upper column section (1), the H-shaped steel lower column section (2), and the node core section (3): respectively connecting the two column end flanges (7) to the ends of the two H-shaped steel columns to form two identical assemblies, wherein the column end flanges (7) are perpendicular to the H-shaped steel columns, one of the assemblies is the H-shaped steel upper column section (1), and the other assembly is connected to the support plate (21) in the U-shaped groove formed by the H-shaped steel column web (8) and the H-shaped steel column flange (9) to form the H-shaped steel lower column section (2); Step 4), assembling the node core segment (3): connecting two core segment flanges (32) to the two ends of the rectangular cross-section steel pipe (31), respectively, with the core segment flanges (32) being perpendicular to the rectangular cross-section steel pipe (31); Step 5), connecting the end plate (41) to the H-shaped steel beam (4): connecting the end plate (41) to the end of the H-shaped steel beam (4), the end plate (41) and the H-shaped steel beam (4) being perpendicular, and the centroid of the end plate (41) coinciding with the cross-sectional centroid of the H-shaped steel beam (4); Step 6), assembling the node reinforcement (5): opening a slot (521) at the center line position of both ends of the longitudinal plate (52), vertically connecting the shear steel bars (522) at both ends of the longitudinal plate (52), the shear steel bars (522) are arranged in two rows with the vertical center line of the longitudinal plate (52) as the symmetry axis, and vertically connecting the wing plate (51) in the middle of the longitudinal plate (52), the wing plate (51) is two pieces, and is symmetrically arranged along the longitudinal plate (52); Step 7), assembling the node core section (3) and the node reinforcement (5) to form a node area assembly: inserting the node reinforcement (5) into the node core section (3), and vertically connecting the wing plate (51) and the longitudinal plate (52) to the inner wall of the rectangular cross-section steel pipe (31); Step 8), fix the H-shaped steel upper column section (1), the H-shaped steel lower column section (2) and the node area assembly: insert the H-shaped steel column webs (8) of the H-shaped steel upper column section (1) and the H-shaped steel lower column section (2) into the slots (521) respectively, so that the column end flange (7) and the core section flange (32) overlap in projection and the contact surfaces are tightly fitted, and the H-shaped steel column webs (8) are connected to the longitudinal plates (52); Step 9), fix the H-shaped steel upper column section (1), the H-shaped steel lower column section (2), the node core section (3) and the H-shaped steel beam (4): high-strength bolts are sequentially passed through the flange bolt holes (421), the core section bolt holes (322), and the column end bolt holes (72) to fix the H-shaped steel beam (4), the H-shaped steel upper column section (1), the H-shaped steel lower column section (2) and the node core section (3); high-strength bolts are sequentially passed through the facade bolt holes (311) and the end plate bolt holes (411) to fix the H-shaped steel beam (4) and the node core section (3); Step 10), filling grouting material (6): filling the grouting material (6) into the rectangular area surrounded by the H-shaped steel upper column section (1), the H-shaped steel lower column section (2), the node core section (3) and the support plate (21), so that the grouting material (6) covers the shear reinforcement (522) but does not exceed the outer edge of the H-shaped steel column flange (9).

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