Fabricated steel-concrete combined frame structure

Abstract

The utility model relates to the technical field of constructional engineering, in particular to an assembly type steel-concrete combined frame structure which comprises a plurality of plate units, a plurality of wall units, a plurality of main beam units, a plurality of secondary beam units and a plurality of column units. The main beam units are fixed between every two adjacent column units, the secondary beam units are fixed between every two adjacent main beam units, the plate units are fixed between every two adjacent main beam units and fixed on secondary beams, and the wall units are fixed between every two adjacent column units and fixed on the main beam units. Dependence on a large number of supports and formworks in the construction process of traditional assembly type components is broken through. By optimizing the connection and stress transmission mode between the components, tedious temporary supporting structure building and complex formwork erecting procedures are avoided, the construction process is greatly simplified, and the technical problem that in the prior art, assembly and installation measures of an assembly type steel-concrete composite structure are complex is solved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a prefabricated steel-concrete composite frame structure. Background Technology

[0002] In the current development of the construction industry, green, energy-saving, environmentally friendly, and sustainable buildings are gradually becoming the mainstream trend. Currently, the mainstream prefabricated structural forms on the market are prefabricated concrete structures and prefabricated steel structures. Each has its advantages and disadvantages. Prefabricated concrete structures have problems such as numerous construction measures and difficulty in controlling the quality of joints; prefabricated steel structures face challenges such as high cost and poor fire and corrosion resistance. In comparison, prefabricated steel-concrete composite structures have significant advantages. In terms of mechanical performance, they combine the characteristics of steel and concrete structures, resulting in strong load-bearing capacity; the joint connections are scientifically designed, reliable, and convenient, reducing construction difficulty and time; in terms of durability, concrete is fireproof and corrosion-resistant, reducing maintenance; in terms of building function, they improve the poor sound and heat insulation of steel structures, enhancing user comfort. However, existing prefabricated steel-concrete composite structures generally suffer from complex assembly and installation measures, leading to low assembly construction efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a prefabricated steel-concrete composite frame structure to solve the technical problem of complicated assembly and installation measures in the existing prefabricated steel-concrete composite structures. The specific technical solution is as follows:

[0004] This utility model provides a prefabricated steel-concrete composite frame structure, including multiple slab units, multiple wall units, multiple main beam units, multiple secondary beam units, and multiple column units; the main beam unit is fixed between two adjacent column units, the secondary beam unit is fixed between two adjacent main beam units, the slab unit is fixed between two adjacent main beam units and fixed on the secondary beam, and the wall unit is fixed between two adjacent column units and fixed on the main beam unit;

[0005] The column unit includes a concrete column and a steel core column. The steel core column is fixed to the lower part of the concrete column, and the upper part of the concrete column is provided with a first connecting component for fixing the main beam unit.

[0006] The main beam unit has a second connecting component at both ends for connecting to the column unit; the secondary beam unit has a third connecting component at both ends of its top surface for connecting to the main beam unit; and the wall unit has a fourth connecting component on its side for connecting to the main beam unit.

[0007] A further improvement of this utility model of prefabricated steel-concrete composite frame structure is that the steel core column includes a web, a stiffening plate and a core column base plate. The upper part of the web is fixed to the lower part of the concrete column, and the lower part of the web extends out of the concrete column. The stiffening plate is fixed to the web, and the core column base plate is fixed to the bottom of the web.

[0008] A further improvement of this utility model's prefabricated steel-concrete composite frame structure is that interconnected grouting holes are provided inside the concrete column and the steel core column.

[0009] A further improvement of the prefabricated steel-concrete composite frame structure of this utility model is that the first connecting component includes a pre-embedded steel plate, column end protruding steel bones and a first horizontal connecting steel bar. The first horizontal connecting steel bar and the pre-embedded steel plate are pre-embedded on the side of the concrete column, and the column end protruding steel bones are fixed to the pre-embedded steel plate.

[0010] A further improvement of the prefabricated steel-concrete composite frame structure of this utility model is that the second connecting component includes beam end protruding steel bars, a second horizontal connecting steel bar and a first vertical steel bar. The beam end protruding steel bars and the second horizontal connecting steel bars are pre-embedded at both ends of the main beam component, and the first vertical steel bar is pre-embedded at the top of the main beam.

[0011] A further improvement of the prefabricated steel-concrete composite frame structure of this utility model is that the third connecting component includes a crossbeam, a bent-up bar, and a second vertical bar. The crossbeam and the bent-up bar are embedded in the secondary beam unit and extend out of the end of the secondary beam unit, and the second vertical bar is embedded in the top of the secondary beam.

[0012] A further improvement of the prefabricated steel-concrete composite frame structure of this utility model is that the fourth connecting component includes corner brackets and reinforcing bars pre-embedded on the inner side of the wall unit.

[0013] A further improvement of this utility model's prefabricated steel-concrete composite frame structure is that the outer side of the wall unit is provided with a thermal insulation and waterproof layer.

[0014] This utility model also provides a construction method for the prefabricated steel-concrete composite frame structure as described above, including the following steps: fixing multiple column units to the foundation through steel core columns;

[0015] The main beam unit is fixed between two adjacent column units by a first connecting component and a second connecting component;

[0016] The secondary beam unit is fixed between two adjacent main beam units by a third connecting component;

[0017] A wall unit is fixed between two adjacent column units using a fourth connecting component, and the wall unit is fixed to the main beam unit;

[0018] A plate unit is fixed between two adjacent main beam units, and the plate unit is fixed to the secondary beam unit.

[0019] A further improvement to the construction method of the prefabricated steel-concrete composite frame structure of this utility model is that, when fixing multiple column units to the foundation through steel core columns, the core column base plate is fixed to the foundation anchor bolts, and the lower part of the steel core column is poured, so that the concrete column and the foundation form an integrated structure.

[0020] The application of the technical solution of this utility model has the following beneficial effects:

[0021] This utility model presents a prefabricated steel-concrete composite frame structure. Utilizing the design logic of steel structures and prefabricated concrete structures, it designs slab units, wall units, main beam units, secondary beam units, and column units, breaking away from the reliance on extensive support and formwork in traditional prefabricated component construction. By optimizing the connection and force transfer methods between components, it avoids the cumbersome construction of temporary support structures and complex formwork procedures, greatly simplifying the construction process and solving the technical problem of complex assembly and installation measures in existing prefabricated steel-concrete composite structures. The steel bars in this utility model do not need to contact each other or undergo precise positioning, and the use of grouting sleeves in the node area is eliminated, effectively solving the problem of difficulty in controlling the construction quality of nodes. The application of ultra-high performance concrete post-cast nodes greatly shortens the minimum safe anchorage length of the steel bars, thereby reducing the post-cast range of precast concrete component connection nodes. The use of standardized prefabricated components and specific connection technologies greatly simplifies the construction process and measures. The connection methods between the structural units in this utility model are clear and easy to operate, reducing the complexity and uncertainty in the construction process, lowering the construction difficulty, and making construction more convenient and efficient.

[0022] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the prefabricated steel-concrete composite frame structure of this utility model;

[0025] Figure 2 This is a structural schematic diagram of the column unit of the prefabricated steel-concrete composite frame structure of this utility model;

[0026] Figure 3This is a structural schematic diagram of the main beam unit of the prefabricated steel-concrete composite frame structure of this utility model;

[0027] Figure 4 This is a structural schematic diagram of the secondary beam unit of the prefabricated steel-concrete composite frame structure of this utility model;

[0028] Figure 5 This is a structural schematic diagram of the wall unit of the prefabricated steel-concrete composite frame structure of this utility model;

[0029] Figure 6 This is a longitudinal sectional view of the connection between the column unit and the structural foundation of the prefabricated steel-concrete composite frame structure of this utility model.

[0030] Figure 7 This is a schematic diagram of the prefabricated steel-concrete composite frame structure of this utility model, in which the main beam unit and column unit are fixed by the embedded plate welding method.

[0031] Figure 8 This is a schematic diagram of the prefabricated steel-concrete composite frame structure of this utility model, in which the main beam unit and column unit are fixed by an insertion method;

[0032] Figure 9 This is a horizontal sectional view of the prefabricated steel-concrete composite frame structure of this utility model, showing the secondary beam unit and the main beam unit fixed together.

[0033] Figure 10 This is a vertical sectional view showing the fixing of the secondary beam unit and the main beam unit in the prefabricated steel-concrete composite frame structure of this utility model.

[0034] The components are as follows: 1. Column unit; 2. Main beam unit; 3. Secondary beam unit; 4. Wall unit; 5. Slab unit; 6. Steel core column; 7. Column end overhanging steel reinforcement; 8. Embedded steel plate; 9. Beam end overhanging steel reinforcement; 10. Bracket plate; 11. Angle bracket; 101. Column structural reinforcement; 102. First horizontal reinforcement; 201. Second horizontal reinforcement; 202. First vertical reinforcement; 301. Bent-up reinforcement; 302. Second vertical reinforcement; 401. Thermal insulation and waterproof layer; 402. Beard reinforcement; 601. Anchor bolt; 602. Positioning connection plate; 603. Installation nut; 604. Steel core column stud; 605. Stiffening plate; 606. Web plate; 607. Grouting hole; 608. Core column base plate; 701. Installation bolt; 702. First stud; 901. Second stud. Detailed Implementation

[0035] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0036] See Figures 1-10As shown, a prefabricated steel-concrete composite frame structure includes multiple slab units 5, multiple wall units 4, multiple main beam units 2, multiple secondary beam units 3, and multiple column units 1. The main beam units 2 are fixed between two adjacent column units 1, the secondary beam units 3 are fixed between two adjacent main beam units 2, the slab units 5 are fixed between two adjacent main beam units 2 and fixed to the secondary beams, and the wall units 4 are fixed between two adjacent column units 1 and fixed to the main beam units 2. Each column unit 1 includes a concrete column and a steel core column 6. The steel core column 6 is fixed to the lower part of the concrete column, and the upper part of the concrete column is provided with a first connecting component for fixing the main beam units 2. The two ends of the main beam units 2 are provided with second connecting components for connecting to the column units 1. The two ends of the top surface of the secondary beam units 3 are provided with third connecting components for connecting to the main beam units 2. The sides of the wall units 4 are provided with fourth connecting components for connecting to the main beam units 2.

[0037] Slab Unit 5 offers two options: composite slabs and fully precast slabs. Composite slabs consist of a precast base slab layered with a cast-in-place composite layer (thickness ≥70mm), with joint widths of 100–200mm. Fully precast slabs are factory-precast monolithic slabs with pre-reserved reinforcing bars at the slab ends that lap with the beam reinforcement, followed by pouring ultra-high performance concrete (UHPC) to fill the joints. These two types differ slightly in construction process, lap dimensions, and pre-reserved / embedded components, allowing for a rational selection based on specific project needs and construction conditions to meet the requirements of different projects.

[0038] Wall unit 4, main beam unit 2, secondary beam unit 3, and column unit 1 are all combinations of reinforced concrete structures with added steel connecting components. The bottom of column unit 1 is connected to the structural foundation via a steel core column 6, and the top of column unit 1 is connected to the beam unit via a steel frame beam. A steel pad is installed on the main beam unit 2. Non-torsional secondary beam units 3 are overlapped onto the steel pad of main beam unit 2 via a crossbeam 10. Torsional secondary beams are interconnected with main beam unit 2 via steel frame beam nodes. After the main structure is formed, precast floor slabs, exterior wall panels, precast stairs, and other components are added to form the building unit. This utility model's structural system uses less steel, has a higher degree of prefabrication during construction, and is convenient for on-site installation. It enables a rapid operation mode with minimal or no support and formwork, allows for large spatial spans, and facilitates later personalized decoration needs.

[0039] Preferably, the steel core column 6 includes a web 606, stiffening plates 605, and a core column base plate 608. The upper part of the web 606 is fixed to the lower part of the concrete column, and the lower part of the web 606 extends out of the concrete column. The stiffening plate 605 is fixed to the web 606, and the core column base plate 608 is fixed to the bottom of the web 606. The steel core column 6 is a cross-shaped steel column, inserted into the concrete column by 400-700mm, with the actual insertion depth determined according to structural requirements. Furthermore, there are multiple stiffening plates 605, which are vertically spaced and fixed to the web 606. The upper few stiffening plates 605 are pre-embedded in the concrete column, while the remaining few are located on the web 606 extending out of the concrete column. After column unit 1 is hoisted, its bottom is connected to the structural foundation using a combination of anchor bolts 601 and nuts. The concrete column base and structural foundation require extended structural reinforcement bars, with a lap length of ≥1.6LaE (LaE being the anchorage length). The actual anchor bolt 601 specifications are determined based on structural calculations. Furthermore, anchor bolts 601, extended reinforcement bars, or extended reinforcement bars and anchor plates are installed at the top of the concrete column. In multi-story structures, the connection method between upper and lower floors differs from that of the first floor. Specifically, the upper column unit 1 is connected to the lower column unit 1 via steel core columns 6 and the anchor bolts 601 and extended reinforcement bars pre-embedded at the top.

[0040] Column unit 1 is also a precast reinforced concrete section according to carefully designed structural requirements. A steel core column 6 is installed at the column base as a connector. The steel core column 6 includes a cross-shaped web 606, with a rectangular core column base plate 608 welded to the bottom of the web 606. Several through holes are provided on the core column base plate 608 for installing anchor bolts 601. The web 606 is directly connected to the other web 606 via stiffening plates 605, and steel core column studs 604 are provided on the web 606 to strengthen the connection between the steel core column 6 and the concrete column. The steel core column 6 enables a firm connection between column unit 1 and the structural ground. Outward-extending reinforcing bars and anchor plates are installed at the top of the column to provide a reliable foundation for connection to the upper structure. Outward-extending steel ribs 7 are provided at the column end corresponding to the structural beam position to ensure a stable connection with the beam unit. For multi-story structures, the multi-story through-column structure can be selected according to actual needs. When a layered design is adopted, the outward reinforcing bars at the top of the column can be appropriately lengthened, the anchor plate can be removed, and the anchor bolts 601 can be added to achieve a stable connection between the upper and lower column units 1 and enhance the overall structure.

[0041] Preferably, the concrete column and the steel core column 6 have interconnected grouting holes 607. Ultra-high performance concrete (UHPC) is poured through the grouting holes 607, and the core column is reinforced with stiffening plates 605. In addition, multiple studs are spaced apart on the web plate 606 to enhance the connection strength with the concrete column.

[0042] Preferred, such as Figure 2 and Figure 6 As shown, the first connecting assembly includes an embedded steel plate 8, a column end extension steel frame 7, and a first horizontal reinforcing bar 102. The first horizontal reinforcing bar 102 and the embedded steel plate 8 are embedded in the side of the concrete column, and the column end extension steel frame 7 is fixed to the embedded steel plate 8. In another embodiment, the embedded steel plate 8 may be omitted, and the column end extension steel frame 7 may be directly inserted into the side of the concrete column for fixation. The column unit 1 is prefabricated and embedded in the concrete column, and the column end extension steel frame 7 is fixed to the embedded steel plate 8 by welding.

[0043] Preferred, such as Figure 3 As shown, the second connecting component includes beam-end extended steel reinforcement 9, a second horizontal reinforcing bar 201, and a first vertical reinforcing bar 202. The beam-end extended steel reinforcement 9 and the second horizontal reinforcing bar 201 are pre-embedded at both ends of the main beam component, and the first vertical reinforcing bar 202 is pre-embedded at the top of the main beam. The main beam unit 2 is lapped together by the first and second connecting members and fixed with bolts. Furthermore, a pre-embedded steel plate 8 can also be pre-embedded during the prefabrication of the beam unit, and the beam-end extended steel reinforcement 9 is fixed to the pre-embedded steel plate 8 by welding. The column-end extended steel reinforcement 7 and the beam-end extended steel reinforcement 9 can take various forms; in this embodiment, H-beams or I-beams are used as examples. The column-end extended steel reinforcement 7 and beam-end extended steel reinforcement 9 extend 300-400mm outwards, with the insertion length into the reinforced concrete structure determined by structural calculations. The inserted portion of the column-end extended steel reinforcement 7 is equipped with two rows of first studs 702, and the inserted portion of the beam-end extended steel reinforcement 9 is equipped with two rows of second studs 901. This strengthens the connection between the steel reinforcement and the reinforced concrete structure. The combination of the column-end extended steel reinforcement 7 and the beam-end extended steel reinforcement 9 can be either inserted or welded. The first horizontal reinforcement 102 extends out of the concrete column, and the second horizontal reinforcement 201 extends out of the beam unit. The lap length of the first horizontal reinforcement 102 and the second horizontal reinforcement 201 must meet ≥1.6LaE.

[0044] The main beam unit 2 and secondary beam unit 3 both contain precast reinforced concrete sections according to strict structural design requirements. The first vertical reinforcement 202, evenly distributed along the length of the main beam unit 2, and the second vertical reinforcement 302, evenly distributed along the length of the secondary beam unit 3, effectively enhance the beam's shear resistance. The beam end extension steel 9, installed at the end of the main beam unit 2, serves as a connector, reliably connecting to the column end extension steel 7 on the side of the column unit 1. A crossbeam 10 is installed at the end of the secondary beam, directly lapped onto the main beam. For the main beam, steel pads are precisely installed according to the position of the secondary beam, providing stable support for its installation; simultaneously, sleeves are pre-embedded at the bottom of the beam according to the wall panel installation points, facilitating wall panel fixing. Bent-up reinforcement 301 is installed at the ends of the secondary beams, further improving the beam's structural performance and connection reliability.

[0045] Preferred, such as Figure 4 As shown, the third connecting component includes a crossbeam 10, a bent-up bar 301, and a second vertical bar 302. The crossbeam 10 and the bent-up bar 301 are embedded in the secondary beam unit 3 and extend beyond the end of the secondary beam unit 3. The second vertical bar 302 is embedded in the top of the secondary beam. Further, a steel pad is embedded on the upper surface of the main beam unit 2. Non-torsional secondary beam units 3 can be simply supported on the steel pad of the main beam unit 2 via the crossbeam 10; torsional secondary beam units 3 are directly fixed to the beam end extension steel frame 9 of the main beam unit 2.

[0046] Preferred, such as Figure 5 As shown, the fourth connection component includes corner brackets 11 and reinforcing bars 402 embedded in the inner side of the wall unit 4. The corner brackets 11 and bolts connect it to the ground and beam units to achieve a support-free effect. After the column unit 1, main beam unit 2, secondary beam unit 3, wall unit 4, and slab unit 5 are all hoisted into place, the joints are poured. The load of the wall unit 4 will be transferred to the main frame structure through the reinforcing bars 402, corner brackets 11, and bolts. The connection nodes at the column bases, beam-column connections, beam-slab connections, and wall-panel-beam connections all require post-pouring of ultra-high performance concrete (UHPC), combined with the staggered anchorage technology of the reinforcing bars, to form a permanent statically indeterminate structural system. The wall unit 4 is equipped with reinforcing bars that bear structural loads. These reinforcing bars penetrate into the connection nodes formed by the wall unit 4, slab unit 5, and beam unit, tightly connecting the wall unit 4 to the main structure, forming a unified whole, and improving the seismic performance and stability of the structure. In addition, wall unit 4 is also equipped with embedded sleeves and tapping screws. The wall panel is reliably connected to the beam unit and the structural ground by bolts and nuts through the corner brackets 11, so as to ensure the firmness and stability of the wall panel installation.

[0047] Preferably, the outer surface of the wall unit 4 is provided with a thermal insulation and waterproof layer 401. The thermal insulation layer not only effectively improves the thermal insulation performance of the building, but also plays a certain protective role.

[0048] This utility model also provides a construction method for the prefabricated steel-concrete composite frame structure as described above, including the following steps: fixing multiple column units 1 to the foundation through steel core columns 6;

[0049] The main beam unit 2 is fixed between two adjacent column units 1 by a first connecting component and a second connecting component;

[0050] The secondary beam unit 3 is fixed between two adjacent main beam units 2 by a third connecting component;

[0051] A wall unit 4 is fixed between two adjacent column units 1 by a fourth connecting component, and the wall unit 4 is fixed to the main beam unit 2;

[0052] A plate unit 5 is fixed between two adjacent main beam units 2, and the plate unit 5 is fixed to the secondary beam unit 3.

[0053] Preferably, when fixing multiple column units 1 to the foundation via steel core columns 6, the core column base plate 608 is fixed to the foundation anchor bolts, and the lower part of the steel core column 6 is poured to form an integral structure between the concrete column and the foundation.

[0054] Specifically, before construction, high-precision molds were used during the production of column unit 1, main beam unit 2, secondary beam unit 3, wall unit 4, and slab unit 5 to control the quality of raw materials and the concrete pouring process, ensuring that the component dimensions, reinforcement configuration, and embedded part positions met the design requirements. At the same time, connecting components such as anchor bolts 601, positioning connection plates 602, installation nuts 603, and installation bolts 701, as well as construction materials such as ultra-high performance concrete (UHPC), were prepared, ensuring that the materials were of qualified quality and met the construction requirements after sampling inspection.

[0055] When installing column unit 1, if Figure 6 As shown, the structural foundation is first cleaned, leveled, and marked out for positioning. Anchor bolts 601 are then pre-embedded. The precast column unit 1 is lifted, and the through hole of the column base steel core column 6 is aligned with the anchor bolt 601. After insertion, the nut 603 is initially tightened. The steel core column 6 is inserted into the precast concrete column to a depth of 400-700mm. In multi-story structures, the steel core column 6 of the upper column unit 1 is precisely connected to the pre-embedded anchor bolt 601 at the top of the lower column unit 1. The position and length of the column structural reinforcement 101 extending outwards from the bottom of the concrete column and the structural reinforcement extending outwards from the structural foundation are checked to ensure an overlap length ≥ 1.6LaE.

[0056] For the installation of main beam unit 2, first hoist it to the installation position so that the beam end overhanging steel frame 9 is initially aligned with the column end overhanging steel frame 7 of column unit 1. If a welded connection with embedded plates is used, such as Figure 7 As shown, clean the embedded steel plates 8 of the main beam unit 2 and column unit 1. After tightly fitting the aligned column end extension steel ribs 7 to the embedded steel plates 8, weld them according to specifications. Similarly, after tightly fitting the aligned beam end extension steel ribs 9 to the embedded steel plates 8, weld them according to specifications, ensuring the weld quality reaches level two or above and is inspected. If an insert connection is used, such as... Figure 8 As shown, the beam end overhanging steel rib 9 and the column end overhanging steel rib 7 of column unit 1 are inserted into the reinforced concrete structure as required, extending 300-400mm outwards. Ensure that the first stud 702 and the second stud 901 are secure and that the insertion length meets the anchoring requirements, and then fix them with bolts. At the same time, check the position of the steel pad on the main beam and the pre-embedded sleeve at the bottom of the beam.

[0057] like Figure 9 and Figure 10As shown, the secondary beam unit 3 is installed. The non-torsional secondary beam is hoisted above the main beam, so that the crossbeam 10 is placed on the main beam steel pad for close contact and positioning. The torsional secondary beam utilizes the pre-embedded steel plate 8 on the side of the main beam to weld the beam end protruding steel rib 9 to form a fixed joint, ensuring welding quality.

[0058] Wall unit 4 and slab unit 5 are installed and hoisted to their installation positions using specialized equipment, ensuring the thermal insulation and waterproofing layer 401 is protected. The wall unit is then securely connected to the ground and secondary beam unit 3 using angle brackets 11 and bolts. The position of the reinforcing steel bars 402 is then checked.

[0059] For the installation of slab unit 5, if a composite slab is selected, it is hoisted and placed on secondary beam unit 3 and main beam unit 2, and its position and elevation are adjusted. After the slab joints are treated, the composite layer reinforcement is tied and concrete is poured and vibrated to ensure compaction. If a fully precast slab is selected, it is hoisted to secondary beam unit 3 and main beam unit 2 for tight overlap, and the slab joints are sealed.

[0060] For joint pouring, ultra-high performance concrete (UHPC) is prepared first, with strict control over the mix proportions and mixing process. When the design load of the steel joint is relatively small, pouring is carried out in the order of column base, beam-column, and beam-slab-wall joints, followed by subsequent hoisting after pouring. If the design load of the steel joint has been fully considered, after unified installation, each joint is poured in order from bottom to top and from main to secondary joints, with vibration compaction. The joint connection and structural integrity are enhanced by using staggered anchoring technology for the reinforcing bars. After pouring, the surface is smoothed and cured.

[0061] The slab unit 5, wall unit 4, main beam unit 2, secondary beam unit 3 and column unit 1 are precisely connected through specific steel structure measures, and the post-cast ultra-high performance concrete (UHPC) joint technology with staggered and mutually anchored steel bars is used to firmly form the main structure, ensuring that the entire frame has good mechanical properties and stability.

[0062] In this structural system, column unit 1 is connected to the structural ground via a post-cast UHPC joint technique using steel core columns 6, anchor bolts 601, and staggered inter-anchoring of reinforcing bars. This connection method effectively transfers loads and ensures structural stability. Beam and column units 1 are connected via a post-cast UHPC joint technique using steel beams, embedded steel plates 8, fixing bolts, and staggered inter-anchoring of reinforcing bars, ensuring reliable connections between beams and columns and improving the overall load-bearing capacity of the structure. Wall unit 4 is connected to the main structure via an external mounting method, which is convenient to install and ensures reliable connections. The main beam unit 2 and secondary beam unit 3 are connected to the slab unit 5 only by lap joints, simplifying the construction process and improving construction efficiency. Each node is poured sequentially according to a specific order to ensure the integrity and stability of the structure.

[0063] This utility model presents a prefabricated steel-concrete composite frame structure. Utilizing the design logic of steel structures and prefabricated concrete structures, it designs slab units 5, wall units 4, main beam units 2, secondary beam units 3, and column units 1, breaking away from the reliance on extensive support and formwork in traditional prefabricated component construction. By optimizing the connection and force transfer methods between components, it avoids the cumbersome construction of temporary support structures and complex formwork procedures, greatly simplifying the construction process and solving the technical problem of complex assembly and installation measures in existing prefabricated steel-concrete composite structures. The steel bars in this utility model do not need to contact each other or undergo precise positioning, and the use of grouting sleeves in the node area is eliminated, effectively solving the problem of difficult quality control in node construction. The application of ultra-high performance concrete post-cast nodes greatly shortens the minimum safe anchorage length of the steel bars, thereby reducing the post-cast range of precast concrete component connection nodes. The use of standardized prefabricated components and specific connection technologies greatly simplifies the construction process and measures. The connection methods between the structural units in this utility model are clear and easy to operate, reducing the complexity and uncertainty in the construction process, lowering the construction difficulty, and making construction more convenient and efficient.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A prefabricated steel-concrete composite frame structure, characterized in that, It includes multiple slab units (5), multiple wall units (4), multiple main beam units (2), multiple secondary beam units (3), and multiple column units (1); the main beam units (2) are fixed between two adjacent column units (1), the secondary beam units (3) are fixed between two adjacent main beam units (2), the slab units (5) are fixed between two adjacent main beam units (2) and fixed on the secondary beams, and the wall units (4) are fixed between two adjacent column units (1) and fixed on the main beam units (2); The column unit (1) includes a concrete column and a steel core column (6). The steel core column (6) is fixed to the lower part of the concrete column, and the upper part of the concrete column is provided with a first connecting component for fixing the main beam unit (2). The main beam unit (2) has a second connecting component at both ends for connecting the column unit (1); the secondary beam unit (3) has a third connecting component at both ends of its top surface for connecting the main beam unit (2); and the wall unit (4) has a fourth connecting component on its side for connecting the main beam unit (2).

2. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The steel core column (6) includes a web (606), a stiffening plate (605), and a core column base plate (608). The upper part of the web (606) is fixed to the lower part of the concrete column, and the lower part of the web (606) extends out of the concrete column. The stiffening plate (605) is fixed to the web (606), and the core column base plate (608) is fixed to the bottom of the web (606).

3. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The concrete column and the steel core column (6) are provided with interconnected grouting holes (607).

4. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The first connecting component includes a pre-embedded steel plate (8), a column end protruding steel bone (7), and a first horizontal steel bar (102). The first horizontal steel bar (102) and the pre-embedded steel plate (8) are pre-embedded on the side of the concrete column, and the column end protruding steel bone (7) is fixed on the pre-embedded steel plate (8).

5. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The second connecting component includes a beam end overhang steel frame (9), a second horizontal steel bar (201), and a first vertical steel bar (202). The beam end overhang steel frame (9) and the second horizontal steel bar (201) are embedded at both ends of the main beam component, and the first vertical steel bar (202) is embedded at the top of the main beam.

6. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The third connecting component includes a slab (10), a bent-up bar (301), and a second vertical bar (302). The slab (10) and the bent-up bar (301) are embedded in the secondary beam unit (3) and extend out of the end of the secondary beam unit (3). The second vertical bar (302) is embedded in the top of the secondary beam.

7. The prefabricated steel-concrete composite frame structure according to claim 1, characterized in that, The fourth connecting component includes a corner bracket (11) and a reinforcing bar (402) pre-embedded on the inner side of the wall unit (4).

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