Quick-assembly new precast concrete structure beam-column space joint system

Abstract

The present invention discloses a novel fast-assembly prefabricated concrete structure beam-column spatial node system, comprising a precast concrete column section, a precast concrete beam section, a core composite steel section and a connecting channel steel section, wherein the precast concrete upper column and the lower column are connected by slotting and plugging the pre-buried large and small channel steels with the composite I-beam inside the outer square steel of the core composite steel section to form a sleeve connection, and the double ear plates at the beam ends of the precast concrete beam section and the composite I-beam end ear plates outside the outer square steel of the core composite steel section are used to form a hinge connection, and then the upper and lower channel cover plates of the connecting channel steel section are respectively welded to the embedded steel plates of the precast concrete beam section and the outer square steel of the core composite steel section. The invention has a reasonable structure, and the fully precast assembled concrete structure beams and columns are rigidly connected for earthquake resistance and energy dissipation, meeting the requirements of the structure's "strong nodes" and earthquake resistance and energy dissipation, and realizing rapid assembly between precast concrete columns and beams.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a novel prefabricated concrete structure beam-column space node system for rapid assembly. Background Art

[0002] As people's living standards improve, their requirements for buildings are getting higher and higher. The main directions and characteristics of the future development of the modern construction industry are greening, informatization, intelligence and industrialization of buildings. Prefabricated and assembled buildings can solve the above problems to a certain extent and are the future trend in the construction field.

[0003] The joint connections and seismic performance of prefabricated concrete beams and columns have become bottlenecks restricting their development. Currently, the commonly used connections for prefabricated concrete structures are mainly divided into wet connections and dry connections. Dry connections reduce wet work on site, increase assembly speed, and provide higher quality assurance compared to wet connections. Converting concrete structure connections to steel connections can fully utilize the inherent advantages of dry connections in steel structures.

[0004] As one of the connection methods for prefabricated and assembled concrete structures, dry connection should be able to ensure that the nodes have the ability to resist axial force, shear force and bending moment to meet the strength and deformation continuity of the node connection area. However, the prefabricated and assembled concrete structures with traditional dry connection cannot achieve high strength and deformation continuity. In addition, the prefabricated and assembled concrete structures with traditional dry connection also have the problems of great difficulty in assembly and low efficiency. Therefore, an improved technology is urgently needed to solve the above problems existing in the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a new type of prefabricated concrete structure beam-column spatial node system that can be assembled quickly. It uses prefabricated concrete column segments, prefabricated concrete beam segments, core composite steel segments and connecting channel steel segments to connect the fully prefabricated concrete structure beams and columns with rigid seismic energy dissipation, meet the requirements of structural "strong nodes" and seismic energy dissipation, and achieve rapid assembly of connection performance between prefabricated concrete columns and beams, while solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a novel prefabricated concrete structure beam-column spatial node system for rapid assembly, comprising prefabricated concrete column segments, prefabricated concrete beam segments, core composite steel segments and connecting channel steel segments;

[0007] The precast concrete column section includes a precast concrete upper column and a precast concrete lower column, wherein a small channel steel is embedded in the precast concrete upper column, and a large channel steel is embedded in the precast concrete lower column, and both the small channel steel and the large channel steel are double channel steels with grooves on the surface;

[0008] The precast concrete beam section includes a precast concrete beam body, a connector, an embedded steel plate, and a beam end double-ear plate, wherein the embedded steel plate is arranged at one end of the precast concrete beam body, the connector is arranged inside the precast concrete beam body and connected to the inner side of the embedded steel plate, and one end of the beam end double-ear plate is connected to the outer side of the embedded steel plate;

[0009] The core composite steel section includes an outer cladding square steel and a composite I-beam. The outer cladding square steel is composed of four steel plates with holes on the surface thereof that are coupled to the outer contour size of the composite I-beam. The four steel plates with holes are passed through the composite I-beam and assembled into the outer cladding square steel and welded into an integral core composite steel section. The flange of the composite I-beam located inside the outer cladding square steel is provided with a slot that is slotted and coupled with the small channel steel and the large channel steel of the precast concrete column section. The end portion of the composite I-beam that extends outside the outer cladding square steel is processed into an ear plate shape to be connected to the double ear plates at the beam end.

[0010] The connecting channel steel section includes a lower channel cover plate and an upper channel cover plate. The two ends of the lower channel cover plate and the upper channel cover plate are respectively welded to the embedded steel plate of the precast concrete beam section and the outer square steel surface of the core composite steel section. The top end of the lower channel cover plate is connected to the bottom end of the upper channel cover plate.

[0011] Preferably, the present invention provides a novel prefabricated concrete structure beam-column spatial node system for rapid assembly, wherein the sizes and slots of the small and large channel steels of the prefabricated concrete column segments are coupled with the core composite steel segments.

[0012] Preferably, the present invention provides a novel prefabricated and assembled concrete structure beam-column spatial node system for rapid assembly, wherein the prefabricated concrete beam segment connectors, embedded steel plates and beam end double-ear plates are all steel structures and welded into a whole.

[0013] Preferably, the present invention provides a novel prefabricated concrete structure beam-column spatial node system for rapid assembly, wherein the double ear plates at the beam ends and the combined I-beams of the core combined steel section extending out of the outer square steel and processed into ear plate shapes are all opened and hingedly coupled to each other.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention utilizes precast concrete column segments, precast concrete beam segments, core composite steel segments and connecting channel steel segments to connect the beams and columns of the fully precast assembled concrete structure with rigid seismic energy dissipation, thereby meeting the requirements of the structure's "strong nodes" and seismic energy dissipation, and realizing the rapid assembly of the connection performance between the precast concrete columns and beams.

[0016] (2) The structure is simple, which makes it easy to assemble and construct quickly on site. Moreover, since it is a prefabricated part, it is also easy to store and transport it in a classified manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the decomposition structure of the present invention;

[0019] Figure 3 Schematic diagram of the coupling connection between the core composite steel segment and the prefabricated column channel steel;

[0020] Figure 4 Schematic diagram of the notching of the middle flange of the combined I-beam and the notching of the small and large channel steels;

[0021] Figure 5 This is a schematic diagram of the precast concrete upper column structure;

[0022] Figure 6 This is a schematic diagram of the precast concrete lower column structure;

[0023] Figure 7 This is a schematic diagram of the precast concrete beam segment structure;

[0024] Figure 8 This is a schematic diagram of the overall structure of the core composite steel section;

[0025] Figure 9 This is a schematic diagram of the decomposed structure of the core composite steel segment;

[0026] Figure 10 Schematic diagram of the connecting channel steel section structure.

[0027] In the figure: 100-precast concrete upper column, 101-precast concrete lower column, 102-small channel steel, 103-large channel steel, 200-precast concrete beam body, 201-beam end double ear plate, 202-embedded steel plate, 203-connector, 300-outer square steel, 301-combined I-beam, 400-lower channel cover plate, 401-upper channel cover plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments and drawings of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that, in the description of the present invention, it should be noted that the terms "inside", "outside", "up", "down", "both sides", "one end", "the other end", "left", "right", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0030] See also Figure 1-10 , the present invention provides a technical solution: a new type of prefabricated concrete structure beam-column space node system for rapid assembly, including prefabricated concrete column segments, prefabricated concrete beam segments, core composite steel segments and connecting channel steel segments;

[0031] The precast concrete column section includes a precast concrete upper column 100 and a precast concrete lower column 101. A small channel steel 102 is embedded in the precast concrete upper column 100, and a large channel steel 103 is embedded in the precast concrete lower column 101. The small channel steel 102 and the large channel steel 103 are both double-channel steels with grooves on the surface. The sizes are coupled and the groove positions correspond. When the precast concrete upper column 100 and the precast concrete lower column 102 are inserted into the core composite steel section, the small channel steel 102 and the large channel steel 103 can be used to groove. After being inserted into the composite I-beam 301, they are inserted into each other to form a connection; the combined shape is similar to a box type, which can make the stress performance of the node in different directions similar, and can meet the randomness of resisting earthquake effects;

[0032] The precast concrete beam section includes a precast concrete beam body 200, a beam end double-ear plate 201, an embedded steel plate 202, and a connector 203. The beam end double-ear plate 201, the embedded steel plate 202, and the connector 203 are welded together as a whole and embedded in the precast concrete beam body 200 via the connector 203. The beam end double-ear plate 201 has a hole on its surface and can be connected to the core composite steel section using a hinge. The connector 203 can be in the form of an I-beam, square steel, or the like depending on actual conditions. The surface of the connector 203 can be reinforced with welded studs or the like to strengthen the connection with the precast concrete beam body 200.

[0033] The core composite steel section includes an outer-clad square steel 300 and a composite I-beam 301. The outer-clad square steel 300 is composed of four perforated steel plates. The size of the perforated holes is coupled with the outer contour of the composite I-beam 301. The four perforated steel plates are passed through the composite I-beam 301 and assembled into the outer-clad square steel 300, which is then welded into an integral core composite steel section. A portion of the composite I-beam 301 is located inside the outer-clad square steel 300. The flange of this portion of the I-beam is grooved for inserting into the grooves of the small channel steel 102 and the large channel steel 103 of the precast concrete column section and then sleeved for connection. The portion of the composite I-beam 301 located outside the outer-clad square steel 300 is processed into an ear plate with a hole at the end for hinge connection with the double ear plate 201 at the beam end of the precast concrete beam section. The coupled size can not only bear the load but also resist the seismic rotation friction energy dissipation. Studs or other connectors are welded on the inner surface of the outer-clad square steel 300 to strengthen the adhesion between the inner portion and the secondary poured concrete.

[0034] The connecting channel steel section includes a lower channel cover plate 400 and an upper channel cover plate 401. The two ends of the lower channel cover plate 400 and the upper channel cover plate 401 are respectively welded to the embedded steel plate 202 of the precast concrete beam section and the surface of the outer square steel 300 of the core composite steel section. The top end of the lower channel cover plate 400 is connected to the bottom end of the upper channel cover plate 401. The channel cover plate can not only transmit the bending moment of the beam end, but also resist the torque of the beam end.

[0035] During the construction process, the precast concrete upper column 100 and the precast concrete lower column 101 of the precast concrete column section can be quickly connected by plugging in the slots of the combined I-beam 301 inside the outer square steel 300 of the core composite steel section through the small channel steel 102 and the large channel steel 103, and then the internal gap of the outer square steel 300 of the core composite steel is grouted densely; the double ear plate 201 at the beam end of the precast concrete beam section is connected to the open ear plate at the end of the combined I-beam 301 inside the core composite steel by hinges, and finally the two ends of the connecting channel steel section are respectively welded to the precast concrete beam section and the core composite steel section, and finally the rapid assembly of the prefabricated assembled concrete structure beam-column spatial node is completed.

[0036] The specific construction steps are as follows:

[0037] Step 1: groove the surface of the small channel steel 102 and the large channel steel 103 of the precast concrete column segment in the factory. The small channel steel 102 and the large channel steel 103 are double channel steels. The small channel steel and the large channel steel are combined and embedded in the precast concrete upper column 100 and the precast concrete lower column 101 respectively. The whole prefabrication is completed in the factory.

[0038] Step 2: The beam end double ear plates 201, embedded steel plates 202 and connectors 203 of the precast concrete beam segment are all steel structures, which are processed and welded into a whole in the factory and embedded in the precast concrete beam body 200. The whole is prefabricated in the factory;

[0039] Step 3: The middle flange of the composite I-beam 301 of the core composite steel segment is slotted to couple with the small channel steel 102 and large channel steel 103 of the precast concrete column segment. The end of the composite I-beam 301 is processed into an ear plate shape, and the size and openings are matched with the double ear plates 201 at the beam end of the precast concrete beam segment. The outer cladding square steel 300 is composed of four steel plates with holes on the surface matching the outer contour size of the composite I-beam 301. Studs or other connectors are welded to the inside of the four perforated steel plates to strengthen the connection of the node. The perforated steel plates pass through the composite I-beam 301 and are assembled into the outer cladding square steel 300, which is then welded into the integral core composite steel segment in the factory.

[0040] Step 4: The lower channel cover plate 400 and the upper channel cover plate 401 connecting the channel steel sections are processed in the factory;

[0041] Step 5: After all components are manufactured in the factory, they are transported to the site for assembly. First, the small channel steel 102 and the large channel steel 103 of the precast concrete column segment are inserted into the combined I-beam 301 inside the outer square steel 300 of the core composite steel segment. The connection is made through the reserved grooves. The gaps inside the outer square steel 300 are grouted densely to complete the rigid connection between the upper and lower columns of the precast concrete column segment and the core composite steel segment.

[0042] Step 6: On site, use hinges to connect the double ear plates 201 at the beam ends of the precast concrete beam segment to the ear plates at the ends of the core composite steel segment and steel segment composite I-beam 301. Then, weld the ends of the lower channel cover plate 400 and the upper channel cover plate 401 of the connecting channel steel segment to the embedded steel plate 202 of the precast concrete beam segment and the outer surface of the core composite steel segment, respectively, to complete the rigid connection between the precast concrete beam segment and the core composite steel segment.

[0043] Step 7: After the rigid connection between the upper and lower columns of the precast concrete column segment and the precast concrete beam segment and the core composite steel segment is completed, the novel precast concrete structure beam-column space node system of the present invention is formed.

[0044] The present invention utilizes precast concrete column segments, precast concrete beam segments, core composite steel segments and connecting channel steel segments to connect the beams and columns of the fully precast assembled concrete structure in a rigid, seismic-resistant and energy-absorbing manner, thereby forming a novel, rapidly assembled precast assembled concrete structure beam-column spatial node system of the present invention, which meets the requirements of structural "strong nodes" and seismic-resistant and energy-absorbing, and greatly improves the connection performance between the precast concrete columns and beams; the structure is simple, which facilitates rapid assembly and construction on site, and because it is a prefabricated part, it is also convenient for classified storage and transportation.

[0045] Anything not described in detail in the present invention is well known to those skilled in the art.

[0046] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified and replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new type of prefabricated concrete structure beam-column spatial node system for rapid assembly, characterized by: It includes precast concrete column segments, precast concrete beam segments, core composite steel segments and connecting channel steel segments; The precast concrete column section includes a precast concrete upper column and a precast concrete lower column. A small channel steel is embedded in the precast concrete upper column, and a large channel steel is embedded in the precast concrete lower column. Both the small channel steel and the large channel steel are double channel steels with grooves on the surface. The size and grooves of the small channel steel and the large channel steel of the precast concrete column section match those of the core composite steel section. The precast concrete beam section includes a precast concrete beam body, a connector, an embedded steel plate, and a beam end double-ear plate. The embedded steel plate is arranged at one end of the precast concrete beam body. The connector is arranged inside the precast concrete beam body and connected to the inner side of the embedded steel plate. One end of the beam end double-ear plate is connected to the outer side of the embedded steel plate. The precast concrete beam section connector, the embedded steel plate, and the beam end double-ear plate are all steel structures and are welded into a whole. The core composite steel section includes an outer cladding square steel and a composite I-beam. The outer cladding square steel is composed of four steel plates with holes on the surface thereof that are coupled to the outer contour size of the composite I-beam. The four steel plates with holes are passed through the composite I-beam and assembled into the outer cladding square steel and welded into an integral core composite steel section. The flange of the composite I-beam located inside the outer cladding square steel is provided with a slot that is slotted and coupled with the small channel steel and the large channel steel of the precast concrete column section. The end portion of the composite I-beam that extends outside the outer cladding square steel is processed into an ear plate shape to be connected to the double ear plates at the beam end. The connecting channel steel section includes a lower channel cover plate and an upper channel cover plate. The two ends of the lower channel cover plate and the upper channel cover plate are respectively welded to the embedded steel plate of the precast concrete beam section and the outer square steel surface of the core composite steel section. The top end of the lower channel cover plate is connected to the bottom end of the upper channel cover plate.

2. A novel prefabricated concrete structure beam-column spatial node system for rapid assembly according to claim 1, characterized in that: The double ear plates at the beam ends and the parts of the combined I-beams of the core combined steel section that extend out of the outer-wrapped square steel and are processed into ear plate shapes are both opened and hingedly coupled to each other.

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