An all-assembled post-cast-free PEC beam-column connecting joint

Abstract

The present application relates to a kind of full assembled post-cast PEC beam column connecting node, including prefabricated PEC column, prefabricated PEC crossbeam and prefabricated PEC longitudinal beam, prefabricated PEC column includes H-shaped steel and concrete, H-shaped steel is fixed with column connecting piece around;Prefabricated PEC crossbeam and prefabricated PEC longitudinal beam are provided with beam end plate towards the end of prefabricated PEC column, beam end plate is connected with beam connecting piece, beam connecting piece and column connecting piece are fixedly connected, beam connecting piece and column connecting piece are collectively wrapped with channel steel outside, and the gap in channel steel is filled with heat preservation sound insulation material.The beneficial effects of the present application are: ensure the connection strength, stiffness, reduce the transportation difficulty, reduce the structure deadweight, reduce transportation cost, reduce the use of formwork, reduce construction period;Avoid the welding quality problem of site welding connection, improve the structure bearing capacity, construction is convenient, reliability is good, anticorrosion performance is superior, with the effect of heat preservation sound insulation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabricated building engineering, and particularly relates to a full-fabricated PEC beam-column connecting joint free of post-pouring. BACKGROUND

[0002] In recent years, in order to deeply implement the green ecological construction policy, lead the construction field to adopt a new construction path of low-carbon and environmental protection, and ensure the sustainable and stable development of the construction industry, the prefabricated building mode has been highly praised.

[0003] PEC structure, i.e. partially coated steel-concrete composite structure, is a composite structure formed by binding steel bars between the flanges of H-shaped steel and pouring concrete. The PEC structure has the advantages of high bearing capacity, good seismic performance, fire and corrosion resistance, fast construction speed and green environmental protection, and is widely used in high-rise buildings, large-span structures and engineering reinforcement fields.

[0004] However, the common PEC structure usually needs to bind steel bars, support forms and pour concrete at the beam-column joint, which causes pollution and damage to the site environment due to wet work. In addition, the post-pouring of concrete increases the complexity of construction, improves the difficulty of quality control of the project, and also causes the extension of the construction period. Moreover, the recycled utilization rate of the forms removed after the concrete reaches a certain strength is not high, which easily forms construction waste and does not conform to the development concept of green environmental protection. SUMMARY

[0005] The application aims at overcoming the deficiencies in the prior art and providing a full-fabricated PEC beam-column connecting joint free of post-pouring.

[0006] The full-fabricated PEC beam-column connecting joint free of post-pouring comprises a prefabricated PEC column, a prefabricated PEC cross beam and a prefabricated PEC longitudinal beam. The prefabricated PEC column comprises H-shaped steel and concrete, and the H-shaped steel is fixed with column connecting pieces around. The prefabricated PEC cross beam and the prefabricated PEC longitudinal beam are provided with beam end plates at the end parts facing the prefabricated PEC column. The beam end plates are connected with beam connecting pieces, the beam connecting pieces and the column connecting pieces are fixed in abutment, the beam connecting pieces and the column connecting pieces are externally wrapped with a channel steel, and the gap in the channel steel is filled with thermal and sound insulation materials.

[0007] Preferably, the beam connecting pieces and the column connecting pieces are both H-shaped steel, the end parts of the beam connecting pieces and the column connecting pieces are complementary bevels, the column connecting pieces are short on top and long on bottom, and the beam connecting pieces are long on top and short on bottom; the webs of the beam connecting pieces and the column connecting pieces are respectively provided with web connecting plates, and the web connecting plates are fixed by high-strength bolts.

[0008] As preferred, two channel steels are symmetrically sleeved outside the beam connector and the column connector, the channel steel flanges are attached to the outer sides of the flanges of the beam connector and the column connector, flange connecting plates are arranged on the outer sides of the channel steel flanges, and the flange connecting plates, the channel steel, the flange of the beam connector and the flange of the column connector are fixed by single-side bolts.

[0009] As preferred, the column connector comprises a column strong-axis connector and a column weak-axis connector, the column strong-axis connector is fixedly connected with the flange of the H-shaped steel, and the column weak-axis connector is connected with the web of the H-shaped steel; the prefabricated PEC cross beam is connected with the column strong-axis connector, and the prefabricated PEC longitudinal beam is connected with the column weak-axis connector.

[0010] As preferred, steel bars are reversely arranged along the length in the prefabricated PEC column, the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam; the steel bars in the prefabricated PEC column are interrupted at the column connector and provided with a column longitudinal bar bending section, the column longitudinal bar bending section is welded and fixed with the column connector; the steel bars in the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam are provided with a beam longitudinal bar bending section at the end, and the beam longitudinal bar bending section is welded and fixed with the beam end plate.

[0011] The assembly method of the full-assembled post-cast-free PEC beam-column connecting joint comprises the following steps:

[0012] S1, welding a column connector around the H-shaped steel of the prefabricated PEC column, welding a beam end plate at one end of the H-shaped steel of the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam, and welding a beam connector outside the beam end plate;

[0013] S2, binding the steel bars of the prefabricated PEC column, the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam;

[0014] S3, pouring and curing the concrete of the prefabricated PEC column, the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam, respectively;

[0015] S4, abutting and fixing the beam connector and the column connector, and installing and wrapping the heat insulation and sound insulation material and the channel steel.

[0016] As preferred, in step S2, the longitudinal bars in the prefabricated PEC column are bent at the end to form a column longitudinal bar bending section, and the column longitudinal bar bending section is welded on the flange of the column connector; the longitudinal bars in the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam are bent at the end to form a beam longitudinal bar bending section, and the beam longitudinal bar bending section is welded inside the beam end plate.

[0017] The full-assembled post-cast-free PEC beam-column connecting joint has the following beneficial effects:

[0018] 1) The web of the beam connecting piece and the column connecting piece in the application is trapezoidal with a certain angle of inclination, and the upper and lower flanges are not equal in length. Compared with the traditional rectangular connecting piece with a right angle, the material is saved, the connection is facilitated, the full assembly type connection of the PEC system beam column component is realized, the independent transportation can be separated, the transportation difficulty is reduced, the transportation cost is reduced, the PEC component is directly assembled on site after factory prefabrication, easy to install, reduce the construction period.

[0019] 2) The application adopts a dry connection construction method, avoids wet work, reduces the construction difficulty, and ensures the construction quality; at the same time, during the on-site assembly process, no construction waste is generated due to the removal of the formwork, which meets the green and environmentally friendly assembly concept; the high-strength bolts and single-sided bolts are used for connection through the connecting plate on site, which avoids the welding quality problem of on-site welding connection, has the advantages of improving the structural bearing capacity, convenient construction, good reliability, superior corrosion resistance and the like.

[0020] 3) The application is provided with a channel steel outside the beam column connecting joint, which avoids the post-pouring belt and makes the appearance more beautiful, facilitating the later decoration. The gap between the channel steel and the web of the connecting joint is filled with thermal and sound insulation materials, which plays a good thermal and sound insulation role.

[0021] 4) The column weak axis connecting piece of the application is arranged between the inner flange and the web of the column H-shaped steel, which on the one hand replaces the reinforced concrete under the premise of ensuring the structural strength, rigidity and the like, reduces the structural dead weight, and on the other hand, the upper and lower flanges of the column weak axis connecting piece can be used as a formwork for pouring concrete, reducing the use of formwork and reducing the cost; the connecting piece and the channel steel at the connecting position of the beam and the column are thickened to ensure the strength of the joint, meeting the design requirement of "strong joint".

[0022] 5) The beam end plate is arranged at the end of the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam of the application, which is used for connecting the beam connecting piece. The beam end plate can also serve as a formwork for pouring concrete of the prefabricated PEC cross beam and the prefabricated PEC longitudinal beam, reducing the use of formwork and reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a full assembly type post-pouring PEC beam column connecting joint structure diagram;

[0024] Figure 2 It is a full assembly type post-pouring PEC beam column connecting joint disassembly diagram;

[0025] Figure 3 It is a prefabricated PEC column structure diagram;

[0026] Figure 4 It is a prefabricated PEC cross beam structure diagram with an end plate;

[0027] Figure 5 Fig. 2 is a schematic view of a prefabricated PEC column structure with end plates;

[0028] Figure 6 Fig. 3 is a schematic view of a disassembled connection between a column strong axis and a beam;

[0029] Figure 7 Fig. 4 is a schematic view of a disassembled connection between a column weak axis and a longitudinal beam;

[0030] Figure 8 Fig. 5 is a schematic view of a connection between a column bending longitudinal reinforcement and a column weak axis connector;

[0031] Figure 9 Fig. 6 is a schematic view of a connection between a beam longitudinal reinforcement bending section and a beam end plate.

[0032] Fig. 1 is a schematic view of a prefabricated PEC column 1, a prefabricated PEC beam 2, a prefabricated PEC longitudinal beam 3, a single-side bolt 4, a steel bar 5, an H-shaped steel 6, concrete 7, a high-strength bolt 8, a column strong axis connector 9, a column weak axis connector 10, a beam connector 11, a bolt hole 13, a heat and sound insulation material 15, a web connecting plate 16, a channel steel 17, a flange connecting plate 18, a beam end plate 22, a column longitudinal reinforcement bending section 24, and a beam longitudinal reinforcement bending section 25. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with examples. The following examples are only used to help understand the present application. It should be pointed out that for ordinary people in the technical field, several modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0034] Example 1

[0035] As an example, as shown in Fig. 1, this full-assembled post-cast-free PEC beam-column connection node includes a prefabricated PEC column 1, a prefabricated PEC beam 2, and a prefabricated PEC longitudinal beam 3. The prefabricated PEC column 1 includes an H-shaped steel 6 and concrete 7, and the H-shaped steel 6 is fixed with column connectors around. Figures 1 to 9 Specifically, as shown in Fig. 2, the column connectors include a column strong axis connector 9 and a column weak axis connector 10. The column strong axis connector 9 is welded to the outer flange of the H-shaped steel 6 of the prefabricated PEC column 1, and is symmetrically arranged with the strong axis of the prefabricated PEC column 1 as the axis of symmetry. The column weak axis connector 10 is welded between the inner flange and the web of the H-shaped steel 6 of the prefabricated PEC column 1, and is symmetrically arranged with the weak axis of the prefabricated PEC column 1 as the axis of symmetry. The prefabricated PEC beam 2 is connected to the column strong axis connector 9, and the prefabricated PEC longitudinal beam 3 is connected to the column weak axis connector 10.

[0036] Figures 1 to 5

[0037] ​​The beam end plate 22 is provided at the end of the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3 towards the prefabricated PEC column 1, the beam connector 11 is connected to the beam end plate 22, the beam connector 11 and the column connector are fixed in butt joint, the flange and web and thickness of the column strong axis connector 9 and the column weak axis connector 10 are respectively greater than the flange and web thickness of the prefabricated PEC column 1; the flange and web thickness of the beam connector 11 is respectively greater than the flange and web thickness of the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3; the flange and web thickness of the column strong axis connector 9 and the column weak axis connector 10 is respectively equal to the flange and web thickness of the beam connector 11.

[0038] The bending stiffness of the beam connector 11 should be greater than the bending stiffness of the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3; the bending bearing capacity of the beam connector 11 is greater than the bending bearing capacity of the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3.

[0039] The beam connector 11 and the column connector are wrapped outside together with the channel steel 17. The bending stiffness of the channel steel 17 is not less than the bending stiffness of the beam connector 11; the bending bearing capacity of the channel steel 17 is not less than the bending bearing capacity of the beam connector 11.

[0040] Steel bars 5 are provided in the prefabricated PEC column 1, the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3 in the length direction; the steel bars 5 in the prefabricated PEC column 1 are interrupted at the column connector and provided with a column longitudinal bar bending section 24, the column longitudinal bar bending section 24 and the column connector are welded and fixed; the steel bars 5 in the prefabricated PEC beam 2 and the prefabricated PEC longitudinal beam 3 are provided with a beam longitudinal bar bending section 25 at the end, the beam longitudinal bar bending section 25 and the beam end plate 22 are welded and fixed.

[0041] Embodiment two

[0042] As another embodiment, the embodiment two is based on the embodiment one and proposes a more specific full-assembled PEC beam-column connection node:

[0043] The beam connector 11 and the column connector are both H-shaped steel 6, the end of the beam connector 11 and the column connector is a complementary bevel, that is, the web shape is trapezoidal and the end surface is inclined at a certain angle. In this embodiment, as shown in Figure 6 and Figure 7 The column connector is short at the top and long at the bottom, the beam connector 11 is long at the top and short at the bottom, and the inclination angles are the same; the webs of the beam connector 11 and the column connector are respectively provided with web connecting plates 16, the two web connecting plates 16 are clamped on both sides of the webs of the beam connector 11 and the column connector, and are fixed by high-strength bolts 8, so as to splice the beam connector 11 and the column connector together.

[0044] Two symmetrical channel steel 17 are sleeved outside the beam connector 11 and the column connector, the flange of the channel steel 17 is attached to the outer side of the flange of the beam connector 11 and the column connector, the outer side of the flange of the channel steel 17 is provided with a flange connecting plate 18, and the flange connecting plate 18, the channel steel 17, the flange of the beam connector 11 and the column connector are fixed by penetrating and fixing through high-strength bolts 8.

[0045] The flange thickness of the channel steel 17 is not less than the flange thickness of the prefabricated PEC column 1 and the flange thickness of the beam connector 11. The web thickness of the channel steel 17 is not less than the web thickness of the prefabricated PEC column 1 and the web thickness of the beam connector 11. The strength of the beam end plate 22 of the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3 is greater than the strength of the flange and the web of the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3. The end plate thickness of the beam end plate 22 is greater than the flange and web thickness of the H-shaped steel 6 of the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3.

[0046] The gap between the web connecting plate 16 and the channel steel 17 is filled with thermal and sound insulation material 15.

[0047] It should be noted that the same or similar parts in this embodiment as in embodiment one can be mutually referred to, and will not be described in detail in this application.

[0048] Embodiment three

[0049] As another embodiment, this embodiment three is based on embodiments one and two, and proposes an assembly method of the full-assembled PEC beam-column connection node without post-cast:

[0050] S1, according to the drawing, the column strong axis connector 9 is welded on the outer side flange of the prefabricated PEC column 1 H-shaped steel 6, the column weak axis connector 10 is welded between the inner side flange and the web, and the bolt hole 13 is reserved on the flange and the web of the column strong axis connector 9 and the column weak axis connector 10; as shown in the drawing, the flange has four bolt holes 13 in this embodiment, the lower flange of the connector has eight bolt holes 13, and there are six bolt holes 13 at the trapezoidal web. The beam end plate 22 is welded on one side of the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3 H-shaped steel 6, and the beam connector 11 is welded on the outer side of the beam end plate 22, and the bolt hole 13 is reserved on the flange and the web of the beam connector 11. Figure 3

[0051] S2, tie the steel bars 5, bend the longitudinal reinforcement end of the prefabricated PEC column 1, and weld the column longitudinal reinforcement bent section 24 on the outer side flange of the column weak axis connector 10; bend the longitudinal reinforcement end of the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3, and weld the beam longitudinal reinforcement bent section 25 on the inner side of the beam end plate 22. A certain distance is left between the bent longitudinal reinforcements.

[0052] ​S3, wrapping the steel bars 5 in the concrete 7 between the two inner flanges and the web of the H-shaped steel 6 of the prefabricated PEC column 1, the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3, and curing.

[0053] S4, transporting the prefabricated PEC column 1, the prefabricated PEC cross beam 2 and the prefabricated PEC longitudinal beam 3 to the construction site, connecting by the web connecting plate 16 using the high-strength bolt 8, connecting by the channel steel 17 and the flange connecting plate 18 using the single-side bolt 4, and carrying out the on-site assembly, wherein the flange connecting plate 18 can be equipped or not according to the actual engineering situation. After aligning the inclined section of the trapezoidal web of the beam connecting piece 11 with the inclined section of the trapezoidal web of the column strong axis connecting piece 9, connecting by the web connecting plate 16 using the high-strength bolt 8 through the bolt hole 13, filling the sound insulation and heat preservation materials outside the web connecting plate 16 to make the gap between the flange and the web of the beam and column connecting pieces full, and then connecting by the flange connecting plate 18 and the channel steel 17 using the single-side bolt 4 through the bolt hole 13.

[0054] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

Claims

1. A full-precast post-cast-free PEC beam-column connection node, characterized in that, The application relates to a prefabricated PEC column (1), a prefabricated PEC cross beam (2) and a prefabricated PEC longitudinal beam (3), wherein the prefabricated PEC column (1) comprises an H-shaped steel (6) and concrete (7), the H-shaped steel (6) is fixed with column connecting pieces on the four sides; the prefabricated PEC cross beam (2) and the prefabricated PEC longitudinal beam (3) are provided with beam end plates (22) at the end parts of the prefabricated PEC column (1), the beam end plates (22) are connected with beam connecting pieces (11), the beam connecting pieces (11) and the column connecting pieces are fixed in butt joint, the beam connecting pieces (11) and the column connecting pieces are jointly wrapped with channel steels (17) outside, and the interspace in the channel steels (17) is filled with heat preservation and sound insulation materials (15); the beam connecting pieces (11) and the column connecting pieces are both H-shaped steels (6), the end parts of the beam connecting pieces (11) and the column connecting pieces are complementary bevels, wherein the column connecting pieces are short at the top and long at the bottom, and the beam connecting pieces (11) are long at the top and short at the bottom; web connecting plates (16) are respectively arranged on the two sides of the webs of the beam connecting pieces (11) and the column connecting pieces, and the web connecting plates (16) are fixed by penetrating through high-strength bolts (8).

2. The full-precast post-cast-free PEC beam-column connection joint according to claim 1, characterized in that, Two channel steels (17) are symmetrically sleeved outside the beam connecting pieces (11) and the column connecting pieces, the flanges of the channel steels (17) are attached to the outer sides of the flanges of the beam connecting pieces (11) and the column connecting pieces, flange connecting plates (18) are arranged on the outer sides of the flanges of the channel steels (17), and the flange connecting plates (18), the channel steels (17), the beam connecting pieces (11) and the column connecting pieces are fixed by penetrating through single-side bolts (4).

3. The full-precast post-cast-free PEC beam-column connection joint according to claim 1, characterized in that, The column connecting pieces comprise column strong-axis connecting pieces (9) and column weak-axis connecting pieces (10), the column strong-axis connecting pieces (9) are fixedly connected with the flanges of the H-shaped steels (6), and the column weak-axis connecting pieces (10) are connected with the webs of the H-shaped steels (6); the prefabricated PEC cross beam (2) is connected with the column strong-axis connecting pieces (9), and the prefabricated PEC longitudinal beam (3) is connected with the column weak-axis connecting pieces (10).

4. The full-precast post-cast-free PEC beam-column connection joint according to claim 1, characterized in that, Steel bars (5) are arranged in the prefabricated PEC column (1), the prefabricated PEC cross beam (2) and the prefabricated PEC longitudinal beam (3) along the length directions; the steel bars (5) in the prefabricated PEC column (1) are interrupted at the column connecting pieces and provided with column longitudinal bar bending sections (24), the column longitudinal bar bending sections (24) and the column connecting pieces are fixed by welding; the steel bars (5) in the prefabricated PEC cross beam (2) and the prefabricated PEC longitudinal beam (3) are provided with beam longitudinal bar bending sections (25) at the ends, and the beam longitudinal bar bending sections (25) and the beam end plates (22) are fixed by welding.

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