Prefabricated concrete beam-prefabricated UHPC coated combination column opposite-penetrating assembly type connecting joint

Abstract

The utility model relates to a prefabricated concrete beam-prefabricated UHPC (Ultra High Performance Concrete) coated combination column opposite-penetrating assembly type connection node, a prefabricated UHPC coated combination column comprises a core fixing piece and a peripheral fixing piece, and UHPC is coated outside the core fixing piece; h-shaped short steel beams are embedded in the ends of the concrete beams, and the ends of the H-shaped short steel beams are connected with core fixing pieces of the prefabricated UHPC coated combination column through angle steel connecting pieces. The prefabricated UHPC coated composite column and the concrete beam with the steel joint have the beneficial effects that the prefabricated UHPC coated composite column and the concrete beam with the steel joint can be quickly mounted after being transported to a site, and only later-stage concrete spraying construction is needed after mounting and connecting, so that the connection between beam column components is convenient, quick, firm and reliable, the workload of on-site molding, mounting and welding is reduced, and the construction efficiency is improved. On the premise of ensuring the quality, the on-site construction procedure is simplified, and the construction time is saved.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated building engineering, in particular to a through-type prefabricated connection joint between a precast concrete beam and a precast UHPC-coated composite column. Background Art

[0002] A prefabricated building refers to a building assembled and installed on-site through reliable connection methods after prefabricated building components and fittings (such as floor slabs, wall panels, stairs, balconies, etc.) are processed and manufactured in a factory and transported to the building construction site. Compared with traditional buildings, prefabricated buildings have the advantages of improving construction efficiency, energy conservation and environmental protection, and fast construction speed. However, at present, there are a large number of stirrups and steel bars in the external concrete of ordinary concrete-coated composite columns. Especially, the structural steel bars in the beam-column joint area are very dense, which causes great difficulties in the on-site construction of beam-column joints. Moreover, at present, the UHPC-coated composite columns and concrete beams are mainly cast-in-place, not prefabricated components, resulting in complicated on-site processes and long construction periods.

[0003] In prefabricated buildings, the connection joints between various prefabricated components are one of the key technologies, and their reliability directly affects the seismic performance and stability of the building.

[0004] At present, the prefabricated building technology started relatively late, and there are generally problems with difficult-to-guarantee construction quality in connection joints. At the same time, in high-rise and long-span structures where prefabricated technologies are widely used, the fire-fighting difficulty is great, and higher requirements are put forward for the fire resistance performance of connection joints. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a through-type prefabricated connection joint between a precast concrete beam and a precast UHPC-coated composite column.

[0006] This through-type prefabricated connection joint between a precast concrete beam and a precast UHPC-coated composite column includes a precast UHPC-coated composite column, an angle steel connector, and a concrete beam. The precast UHPC-coated composite column includes a core fastener and a peripheral fastener, and the core fastener is coated with UHPC concrete; an H-shaped short steel beam is embedded at the end of the concrete beam, and the end of the H-shaped short steel beam is connected to the core fastener of the precast UHPC-coated composite column through an angle steel connector; concrete is cast-in-place outside the H-shaped short steel beam.

[0007] Preferably, one side of four angle steel connectors is respectively connected to the outer side of the flange and both sides of the web of the H-shaped short steel beam, and the other side passes through the peripheral fastener through a core high-strength bolt and is fixedly connected to the core fastener of the precast UHPC-coated composite column.

[0008] Preferably, beam shear members are provided on the flange and web of the H-shaped short steel beam.

[0009] Preferably, shear-resistant columns are provided on the outer surface of the core firmware.

[0010] Preferably, bolt holes are provided on the flanges of the H-shaped short steel beams and the peripheral firmware of the precast UHPC-clad composite columns.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1) The present utility model adopts precast UHPC-clad composite columns and concrete beams with steel joints, which can be quickly installed on site. After installation and connection, only the subsequent spraying of concrete construction is required, making the connection between beam and column members convenient, fast, firm and reliable, reducing the workload of on-site formwork making, installation and welding. On the premise of ensuring quality, the on-site construction process is simplified and construction man-hours are saved.

[0013] 2) The present utility model adopts precast UHPC-clad composite columns. By utilizing the superior mechanical properties and ductility of UHPC concrete, the steel bars and stirrups in UHPC concrete can be effectively reduced, which is beneficial to the construction of beam-column connection nodes. The UHPC concrete of the precast UHPC-clad composite column can effectively protect the steel pipe, column longitudinal bars and column stirrups inside the core firmware under fire. At the same time, the concrete beam can still effectively bear the load under fire. The externally wrapped beam concrete delays the temperature rise of the H-shaped steel beam, improves the fire resistance of the connection node, and enhances the structural safety.

[0014] 3) By reserving bolt holes on the H-shaped short steel beams, angle steel connectors and precast UHPC-clad composite columns, the connection node requires little or no welding work, is convenient for processing and installation, and avoids the influence of welding residual stress and welds on the quality of the connection node. Description of the Drawings

[0015] Figure 1 Schematic diagram of the through-type assembled connection node of precast concrete beam - precast UHPC-clad composite column;

[0016] Figure 2 Connection diagram of precast UHPC-clad composite column and concrete beam;

[0017] Figure 3 Structural diagram of precast UHPC-clad composite column;

[0018] Figure 4 Connection structure diagram of concrete beam and H-shaped short steel beam;

[0019] Figure 5 Split diagram of concrete beam.

[0020] Description of reference numerals: Prefabricated UHPC - clad composite column 1, Angle steel connector 2, Concrete beam 3, Core fastener 11, Peripheral fastener 12, Column shear member 13, Reserved hole 14, UHPC concrete 15, Through - core high - strength bolt 21, Connecting angle steel 22, High - strength bolt 23, Prefabricated concrete beam 31, H - shaped short steel beam 32, Beam shear member 33, Penetration hole 221, I - beam penetration hole 321, H - steel flange 322, H - steel web 323. Detailed implementation manners

[0021] The following describes the present utility model in further detail with reference to embodiments. The description of the following embodiments is only for helping to understand the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0022] As an embodiment, as Figures 1 to 5 shown, this prefabricated concrete beam - prefabricated UHPC - clad composite column through - type assembled connection node includes a prefabricated UHPC - clad composite column 1, an angle steel connector 2, and a concrete beam 3. An H - shaped short steel beam 32 is embedded at the end of the concrete beam 3. The end of the H - shaped short steel beam 32 is connected to the side of the prefabricated UHPC - clad composite column 1 through the angle steel connector 2, aiming to improve the bearing capacity and seismic performance of the connection node, and at the same time simplify the construction process, improve the construction efficiency and quality.

[0023] The cross - sectional shape of the angle steel connector 2 is L - shaped. One side of the four angle steel connectors 2 is respectively connected to the outer side of the flange 322 and both sides of the web 323 of the H - shaped short steel beam 32, clamping the end of the H - shaped short steel beam 32 in the middle for fixation. The other side of the angle steel connector 2 is fixedly connected to the prefabricated UHPC - clad composite column 1 through a through - core high - strength bolt 21. Bolt holes are provided on the flange 322 of the H - shaped short steel beam 32 to facilitate the penetration of the high - strength bolt 23 to connect the H - shaped short steel beam 32, avoiding the influence of welding residual stress and weld seams on the quality of the connection node.

[0024] A row of beam shear members 33 is arranged along the length direction at the center of the flange 322 and the web 323 of the H - shaped short steel beam 32. A column shear member 13 is provided in a column on each side of the side of the core fastener 11 connected to the H - shaped short steel beam 32, and several column shear members 13 are distributed at intervals on the other two sides, effectively improving the shear resistance of the H - shaped short steel beam 32 and the UHPC - clad composite column 1, and ensuring the connection strength between the two.

[0025] Embodiment Two

[0026] As another embodiment, this second embodiment is proposed based on the first embodiment. A more specific precast concrete beam - precast UHPC - coated composite column through - type assembled connection joint. The precast UHPC - coated composite column 1 includes a core reinforcement 11 and a peripheral reinforcement 12, as Figure 3 shown.

[0027] UHPC concrete 15 is cast between the core reinforcement 11 and the peripheral reinforcement 12. The UHPC concrete 15 wraps around the outside of the core reinforcement 11 and plays a protective role for the core reinforcement 11. Specifically, the UHPC concrete 15 can effectively protect the steel pipe, column longitudinal reinforcement and column stirrups inside the core reinforcement 11 under fire, and can still provide effective force for the concrete beam 3 under fire.

[0028] At the same time, beam concrete is also cast and wrapped outside the H - shaped short steel beam 32, forming an integral body with the concrete beam 3. When a fire occurs, the beam concrete outside the H - shaped short steel beam 32 delays the increase in the temperature of the H - shaped short steel beam 32, improves the fire resistance of the connection joint, and enhances the structural safety.

[0029] The end of the H - shaped short steel beam 32 is connected to the core reinforcement 11 of the precast UHPC - coated composite column 1 through an angle steel connector 2. The through - core high - strength bolt 21 passes through the peripheral reinforcement 12 and is fixedly connected to the core reinforcement 11 of the precast UHPC - coated composite column 1.

[0030] Bolt holes are provided on the peripheral reinforcement 12 of the precast UHPC - coated composite column 1, facilitating the through - core high - strength bolt 21 to pass through and be fixedly connected to the core reinforcement 11, avoiding the influence of welding residual stress and weld seams on the quality of the connection joint.

[0031] It should be noted that the same or similar parts in this embodiment and the first embodiment can be referred to each other and will not be elaborated in this application.

[0032] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

Claims

1. A precast concrete beam - precast UHPC - coated composite column through - assembled connection joint, characterized in that, It includes a precast UHPC - clad composite column, angle steel connectors and a concrete beam. The precast UHPC - clad composite column includes a core reinforcement and a peripheral reinforcement, and the core reinforcement is clad with UHPC concrete; at the end of the concrete beam, an H - shaped short steel beam is embedded, and the end of the H - shaped short steel beam is connected to the core reinforcement of the precast UHPC - clad composite column through angle steel connectors; concrete is cast - in - place outside the H - shaped short steel beam.

2. The precast concrete beam - precast UHPC - clad composite column penetrating assembled connection joint according to claim 1, wherein One side of the four angle steel connectors is respectively connected to the outer side of the flange and both sides of the web of the H - shaped short steel beam, and the other side passes through the peripheral reinforcement by through - core high - strength bolts and is fixedly connected to the core reinforcement of the precast UHPC - clad composite column.

3. The precast concrete beam - precast UHPC - clad composite column through - type assembled connection joint according to claim 1, characterized in that, Shear connectors for the beam are arranged on the flange and web of the H - shaped short steel beam.

4. The precast concrete beam - precast UHPC - coated composite column penetrating and assembled connection joint according to claim 1, characterized in that, Shear connectors for the column are arranged on the outer surface of the core reinforcement.

5. The precast concrete beam-precast UHPC clad composite column through-type assembled connection joint according to claim 1, characterized in that, Bolt holes are provided on the flange of the H - shaped short steel beam and the peripheral reinforcement of the precast UHPC - clad composite column.

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