A prefabricated reinforced concrete frame structure with steel component connections

Abstract

This utility model discloses a prefabricated reinforced concrete frame structure with steel component connections, belonging to the field of prefabricated building construction technology. Addressing the problems of cumbersome formwork support in traditional cast-in-place frames and the unreliability and partial need for formwork support in existing prefabricated joint connections, this structure includes precast columns, precast main beams with or without corbels, precast secondary beams, composite ribbed composite slabs, and column-to-column connection embedded parts. Rigid beam-column connections are achieved through T-shaped steel corbels, channel steel corbels, steel embedded parts components, and rebar bolt connectors. Grouting sleeves of the column-to-column connection embedded parts connect the longitudinal reinforcement of the upper and lower columns. Steel clips on the composite ribbed composite slabs are engaged and positioned with the main beams, and the precast layer serves as the bottom formwork. This structure achieves a completely support-free and formwork-free process, continuous force transmission at joints, strong seismic resistance, factory prefabrication ensuring quality, high on-site assembly efficiency, reduced construction waste, adaptability to multiple scenarios, and ease of modification. It is suitable for frame buildings such as residential and office buildings.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building construction technology, specifically relating to a prefabricated reinforced concrete frame structure with steel component connections. Background Technology

[0002] In the construction of traditional reinforced concrete frame structures, a large amount of on-site formwork, temporary support erection, and wet work are required. On the one hand, the formwork needs to be cut and assembled on-site according to the size of the components, which not only consumes a lot of materials and is complicated, but also easily generates construction waste after the formwork is removed, which does not meet the requirements of green construction. On the other hand, the temporary support needs to bear the vertical load during the component pouring process. The support system has a long erection period, high cost, and there are safety hazards caused by the instability of the support.

[0003] Meanwhile, the beam-column connections in traditional frame structures largely rely on on-site rebar tying and concrete pouring. The dense rebar in the joint areas makes construction difficult and prone to problems such as inadequate compaction and discontinuous force transmission, affecting the overall structural integrity and seismic performance. While the development of prefabricated buildings has reduced some on-site wet work in existing prefabricated frame structures, problems remain, including complex joint connections, reliance on temporary supports to fix prefabricated components, and the need for partial formwork after some components are assembled. This prevents the complete realization of "support-free and formwork-free" construction, hindering further improvements in construction efficiency and project quality. Utility Model Content

[0004] To address the problems of complex formwork, cumbersome support, and insufficient reliability of joint connections in the construction of existing reinforced concrete frame structures, this utility model provides a prefabricated reinforced concrete frame structure with steel component connections. By optimizing the design of prefabricated components and the joint connection method, it achieves standardized production of components in the factory, on-site assembly without formwork and without temporary support, thereby improving construction efficiency, ensuring structural performance, and reducing construction costs and safety risks.

[0005] In a first aspect, this utility model proposes a prefabricated reinforced concrete frame structure with steel component connections, comprising: precast columns for providing vertical support, wherein the precast columns have pre-embedded connection structures at their ends that cooperate with column-to-column connection components during prefabrication; precast main beams, including precast main beams without corbels and precast main beams with corbels, wherein the precast main beams are connected to the precast columns through beam-column joint connection structures; precast secondary beams connected to the precast main beams, wherein the ends of the precast secondary beams are provided with connection components that match the precast main beams; composite rib composite slabs, wherein the ends of the composite rib composite slabs are provided with steel support components, which are erected on the precast main beams and precast secondary beams; and column-to-column connection components for connecting the upper and lower precast columns or the precast columns with column bases, so that the upper and lower precast columns, after assembly, form a stable vertical force-bearing system with the column bases.

[0006] This prefabricated reinforced concrete frame structure, connected by steel components, forms a complete load-bearing system through the collaborative design of various prefabricated components and specialized steel components: pre-embedded fitting structures at the ends of prefabricated columns, along with column-to-column connections (including column base connections), ensure vertical stability and force transmission; prefabricated main beams are rigidly connected to columns via beam-column joints, with designs including or without corbels to accommodate different secondary beam arrangements; prefabricated secondary beam end connectors precisely match the main beams, ensuring continuous horizontal force transmission; composite ribbed slabs are erected on the beams using embedded steel supports, achieving support-free installation. The entire structure primarily relies on mechanical connections through steel components (such as joint connectors and embedded supports), reducing on-site wet work, ensuring structural integrity and seismic resistance while achieving efficient assembly, thus solving the problems of complex connections and reliance on support formwork in traditional prefabricated construction.

[0007] Preferably, the beam-column joint connection structure includes a first corbel and a steel embedded part. The first corbel protrudes from the side of the precast column, and the steel embedded part is embedded in the end of the precast main beam. The horizontal flange of the first corbel is fixed to the steel embedded part by bolts or welding.

[0008] Through the above technical solution, the first bracket and the steel embedded part are fixed by bolts or welding to achieve precise connection between beam and column, direct and reliable force transmission, flexible connection method to adapt to construction needs, strengthen node rigidity and help efficient assembly.

[0009] More preferably, the precast main beam has pre-set installation grooves and casting inlets at both ends. The installation grooves cooperate with the horizontal flanges of the first corbel, and the casting inlets are used to fill grout. The horizontal flanges of the first corbel and the installation grooves are also provided with matching installation positioning holes.

[0010] Through the above technical solutions, the installation groove and the first bracket flange are matched and the positioning holes are set to achieve precise alignment of the main beam and improve assembly efficiency; the pouring of the inclined opening facilitates the full filling of the joint with grout, enhances the overall connection, and the bolt fixing ensures the rigidity of the joint, thus optimizing the construction and stress performance.

[0011] More preferably, the portion of the first bracket protruding from the side of the precast column is trapezoidal or channel-shaped, and the first bracket includes a T-shaped steel bracket and a channel-shaped steel bracket, with the mounting groove cooperating with the trapezoidal or channel-shaped first bracket.

[0012] Through the above technical solutions, the T-shaped steel bracket is designed as a trapezoid or groove shape and matches the installation groove, which enhances the installation guidance and alignment accuracy, increases the contact area and improves the shear resistance, and can also assist in the filling of grouting material, optimize the stress of the node and construction efficiency.

[0013] Preferably, the column-to-column connection embedded part is a frame-shaped steel component, and each of the four corners of the column-to-column connection embedded part is provided with a steel bar bolt connector. The column-to-column connection embedded part is also provided with a grouting sleeve for connecting with the longitudinal reinforcement of the precast column. After the longitudinal reinforcement of the precast column is inserted into the grouting sleeve, the connection is achieved by filling with grout.

[0014] Through the above technical solutions, the frame steel components provide overall rigidity, and the four corner steel bar bolt connectors and grouting sleeves work together to achieve double connection of the column longitudinal reinforcement: the grouting sleeves ensure continuous vertical force transmission, the frame structure assists in positioning, improves installation accuracy and connection reliability, and adapts to the needs of support-free construction.

[0015] Preferably, the composite ribbed slab includes a precast base plate, and the steel support embedded part is a steel clip that is welded and fixed to the end of the precast base plate. The steel clip is provided with a buckle structure that cooperates with the embedded steel plate on the precast main beam, so that the composite ribbed slab is limited and fixed by the buckle structure when it is erected on the precast main beam.

[0016] Through the above technical solution, the steel clips are firmly welded to the precast base plate. Their snap-fit ​​structure cooperates with the pre-embedded steel plate of the main beam to achieve rapid positioning and fixing of the composite plate without the need for temporary support, thereby improving installation accuracy and efficiency. At the same time, it enhances the overall connection between the plate and the beam, and is suitable for support-free construction requirements.

[0017] Preferably, a second corbel is provided on one or both sides of the precast main beam with corbel, and a reinforcing bar is vertically provided on the second corbel. The connector is configured as a boss that cooperates with the second corbel. The boss is located at the end of the precast secondary beam, and the boss has a built-in insertion hole that cooperates with the reinforcing bar.

[0018] Through the above technical solution, the second corbel and the secondary beam protrusion, the dowel bar and the dowel hole are precisely matched, the secondary beam is quickly positioned, the vertical force transmission and shear resistance are enhanced, the construction is convenient, and the overall integrity of the main and secondary beam joints is improved.

[0019] Preferably, the beam-column joint connection structure further includes cross reinforcing bars, which are used to connect the longitudinal bars of the precast column.

[0020] Through the above technical solution, the cross-reinforcement connection of the precast column longitudinal reinforcement can realize the continuous force transmission of the column longitudinal reinforcement in the joint area, avoiding the force transmission discontinuity caused by the segmentation of longitudinal reinforcement; at the same time, a mesh support structure is formed in the joint, which significantly improves the shear bearing capacity and deformation resistance of the beam-column joint, especially enhancing the joint stability under horizontal loads such as earthquakes, which meets the design requirements of "strong joint", and works in synergy with T-shaped steel brackets, channel steel brackets, steel embedded parts to strengthen the overall stiffness of the joint and ensure the reliability of the frame structure under stress.

[0021] Preferably, the composite rib slab further includes a mixed rib and a surface steel mesh. The mixed rib is provided with a rib steel truss, which includes an upper chord, a lower chord, and web reinforcement. The lower chord is welded and fixed to the upper layer of reinforcement of the precast base slab. The upper chord is tied or welded to the surface steel mesh, and the steel clamp is welded to the end of the lower chord.

[0022] Through the above technical solution, the rib steel truss is connected to the precast bottom slab and surface steel mesh through the chord bars to form an overall stress system. The steel clamps are welded to the lower chord bars to strengthen the support, thereby improving the integrity and load-bearing capacity of the composite slab.

[0023] Preferably, the prefabricated reinforced concrete frame structure is configured to have at least three floors.

[0024] The above technical solutions are adapted to the needs of multi-story buildings, enhance vertical force transmission and lateral displacement resistance, improve efficiency and reduce costs, ensure the quality of inter-story nodes, and expand the application scenarios of the structure.

[0025] Compared with the prior art, the beneficial results of this utility model are as follows:

[0026] This prefabricated frame, connected by steel components, requires no supports or formwork. T-shaped steel brackets, channel steel brackets, and embedded steel parts achieve rigid connections. Column-to-column connection embedded parts ensure vertical force transmission. Steel clamps secure the composite ribbed slabs, allowing for multi-story compatibility. It solves formwork support issues, improving construction efficiency; ensures reliable node connections, continuous force transmission, and strong seismic resistance; provides stable quality thanks to factory prefabrication; adapts to multi-story structures, expanding application scenarios; and is environmentally friendly, reducing waste. Attached Figure Description

[0027] The accompanying drawings are included to provide a further understanding of the embodiments, and these drawings are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized, as they become better understood through reference to the following detailed description.

[0028] Figure 1 This is a schematic diagram of the overall structure of the prefabricated reinforced concrete frame structure according to an embodiment of the present utility model;

[0029] Figure 2 This is an exploded view of the overall structure of an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a beam-column joint according to an embodiment of this utility model. Figure 1 ;

[0031] Figure 4 A schematic diagram of a beam-column joint according to an embodiment of this utility model. Figure 2 ;

[0032] Figure 5 A schematic diagram of a beam-column joint according to an embodiment of this utility model. Figure 3 ;

[0033] Figure 6 This is a structural diagram of the beam-column joint of an assembled reinforced concrete frame, as shown in an embodiment of this utility model.

[0034] Figure 7 This is a plan view of the beam-column joint of the prefabricated reinforced concrete frame in this embodiment;

[0035] Figure 8 This is a schematic diagram of the T-shaped steel bracket at the intersection of four beams in the beam-column joint connection structure of this embodiment;

[0036] Figure 9 This is a schematic diagram of the T-shaped steel bracket at the intersection of three beams in the beam-column joint connection structure of this embodiment;

[0037] Figure 10 This is a detailed drawing of the T-shaped steel bracket structure at the intersection of four beams in this embodiment;

[0038] Figure 11 This is a detailed structural drawing of the first method for constructing the T-shaped steel bracket at the intersection of three beams in this embodiment;

[0039] Figure 12 This is a detailed structural drawing of the second method for the T-shaped steel bracket at the intersection of three beams in this embodiment;

[0040] Figure 13 This is a detailed drawing of the T-shaped steel bracket in this embodiment;

[0041] Figure 14 Detailed structural drawing of a four-beam confluence groove steel bracket construction according to another embodiment;

[0042] Figure 15 A detailed structural drawing of a three-beam confluence channel steel bracket construction method 1, as shown in another embodiment;

[0043] Figure 16 Detailed construction drawing of the second embodiment of the three-beam confluence channel steel bracket;

[0044] Figure 17 Detailed drawing of a channel steel bracket according to another embodiment;

[0045] Figure 18 This is a schematic diagram of a precast main beam without corbels in an embodiment of this utility model;

[0046] Figure 19 for Figure 7 Detailed cross-sectional view of the central AA section;

[0047] Figure 20 for Figure 7Detailed cross-sectional view of another embodiment of the AA along the middle;

[0048] Figure 21 For along Figure 7 Detailed cross-sectional construction of beam joint in the middle BB;

[0049] Figure 22 For along Figure 7 Detailed cross-sectional view of the beam joint in another embodiment of BB;

[0050] Figure 23 For along Figure 7 Detailed cross-sectional view of the CC section;

[0051] Figure 24 This is a schematic diagram of a precast main beam with corbels in an embodiment of this utility model;

[0052] Figure 25 This is a schematic diagram of the prefabricated secondary beam in an embodiment of this utility model;

[0053] Figure 26 Details of the primary and secondary beam connection nodes in this embodiment Figure 1 ;

[0054] Figure 27 Details of the primary and secondary beam connection nodes in this embodiment Figure 2 ;

[0055] Figure 28 This is a detailed structural drawing of the precast column base in this embodiment;

[0056] Figure 29 , Figure 30 and Figure 31 All are detailed drawings of the steel bar bolt connector in this embodiment;

[0057] Figure 32 The composite ribbed plate with steel support embedded parts at the ends in this embodiment is shown in the image. Figure 1 ;

[0058] Figure 33 The composite ribbed plate with steel support embedded parts at the ends in this embodiment is shown in the image. Figure 2 ;

[0059] Figure 34 This is a schematic diagram of the first method for connecting the composite ribbed plate and the composite beam in this embodiment;

[0060] Figure 35 This is a schematic diagram of the second method for connecting the composite ribbed plate and the composite beam in this embodiment.

[0061] Figure descriptions: 1. Precast column; 2. Precast main beam; 3. Precast secondary beam; 4. Composite rib slab; 5. Column-to-column connection embedded part; 6. Beam-column joint connection structure; 61. First corbel; 62. Steel embedded part; 7. Installation groove; 8. Casting bevel; 9. Installation positioning hole; 10. Rebar bolt connector; 11. Grouting sleeve; 12. Precast base plate; 13. Steel support embedded part; 14. Second corbel; 15. Dowel bar; 16. Boss; 17. Insertion hole; 18. Crossed reinforcement; 19. Composite rib; 20. Surface reinforcement mesh. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0063] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0064] The prefabricated reinforced concrete frame structure with steel component connections disclosed in this utility model is suitable for multi-story buildings (such as 3 stories and above). It achieves support-free and formwork-free construction by connecting prefabricated components in the factory with on-site steel components. The following description, in conjunction with the appendix... Figures 1 to 35 The structure of each part is described in detail.

[0065] like Figure 1 and Figure 2 As shown, this prefabricated reinforced concrete frame structure includes precast columns 1, precast main beams 2, precast secondary beams 3, composite ribbed composite slabs 4, and column-to-column connection embedded parts 5. The precast columns 1 provide vertical support, and during prefabrication, connection structures that cooperate with the column-to-column connection embedded parts 5 are pre-embedded at their ends. The precast main beams 2 include precast main beams without corbels and precast main beams with corbels. The precast main beams 2 are connected to the precast columns 1 through beam-column joint connection structures 6. The precast secondary beams 3 are connected to the precast main beams 2, and the ends of the precast secondary beams 3 are equipped with connectors that match the precast main beams 2. The composite ribbed composite slabs 4 have steel support embedded parts 13 at their ends, and are erected on the precast main beams 2 and precast secondary beams 3 through the steel support embedded parts 13. The column-to-column connection embedded parts 5 are used for connection between the upper and lower precast columns 1 or between the precast columns 1 and the column base, so that the upper and lower precast columns 1 form a stable vertical force-bearing system with the column base after assembly.

[0066] This prefabricated reinforced concrete frame structure, connected by steel components, forms a complete load-bearing system through the collaborative design of various prefabricated components and specialized steel components: The prefabricated column 1 has an embedded fitting structure at its end, which connects to the column-to-column embedded parts 5 (including column base connections) to achieve vertical stability and force transmission; the prefabricated main beam 2 is rigidly connected to the column through beam-column node connection structure 6, with or without corbels to adapt to different secondary beam arrangements; the prefabricated secondary beam 3's end connectors are precisely matched with the main beam to ensure continuous horizontal force transmission; the composite ribbed composite slab 4 is erected on the beams relying on steel support embedded parts 13, achieving support-free placement. The entire structure is primarily connected mechanically by steel components (such as node connectors and support embedded parts), reducing on-site wet work, ensuring both structural integrity and seismic resistance, and achieving efficient assembly, solving the problems of complex connections and reliance on support formwork in traditional prefabricated structures.

[0067] Further reference Figures 3 to 16 Preferred, such as Figures 3 to 8 As shown, the beam-column joint connection structure 6 includes a first corbel 61 and a steel embedded part 62. The first corbel 61 protrudes from the side of the precast column 1, and the steel embedded part 62 is embedded in the end of the precast main beam 2. The horizontal flange of the first corbel 61 is fixed to the steel embedded part 62 by bolts or welding. The first corbel 61 and the steel embedded part 62 are fixed by bolts or welding to achieve precise beam-column connection, direct and reliable force transmission, flexible connection method to adapt to construction needs, enhanced joint rigidity, and facilitate efficient assembly.

[0068] In a further preferred embodiment, the beam-column joint connection structure 6 also includes cross reinforcing bars 18, which are used to connect the longitudinal reinforcement of the precast column 1. The cross reinforcing bars 18 connect the longitudinal reinforcement of the precast column 1, which can realize the continuous force transmission of the column longitudinal reinforcement in the joint area and avoid the force transmission discontinuity caused by the segmentation of the longitudinal reinforcement; at the same time, a mesh support structure is formed in the joint, which significantly improves the shear bearing capacity and deformation resistance of the beam-column joint, especially enhancing the stability of the joint under horizontal loads such as earthquakes, which meets the design requirements of "strong joint", and works in conjunction with the first corbel 61, steel embedded parts 62, etc. to strengthen the overall stiffness of the joint and ensure the reliability of the frame structure under stress.

[0069] Figure 6 This is a structural diagram of the beam-column joint of an assembled reinforced concrete frame according to an embodiment of this utility model, as shown below. Figure 6 As shown, the central vertical member is a precast column 1, with built-in longitudinal steel bars and stirrups; the left and right horizontal members are precast beams, with longitudinal reinforcing bars inside. Crossed steel bars 18 are set in the node area to form a mesh constraint, which enhances the shear resistance; the filling is a cast-in-place concrete composite layer, which makes the connection between the precast column 1 and the beam tighter and the internal force transmission more continuous; steel embedded parts 62 with bolt holes are visible on both sides, which are used to connect the steel components of the precast column 1 and the beam, such as bolt fixing or welding, to achieve a "strong node" structure and ensure the overall stability and seismic resistance of the frame.

[0070] Figure 7This is a plan view of the beam-column joint of a prefabricated reinforced concrete frame according to an embodiment of this utility model. It presents a cross-shaped column-beam connection joint: the central part is the joint area of ​​the prefabricated column 1, and the surrounding area is connected to the horizontal prefabricated beams; the joint has a beam-column joint connection structure 6, a crisscrossing steel mesh, and a collaborative structure between the steel bars in the beam and the joint. Through the cooperation of steel components and steel bars, a rigid connection between the prefabricated column 1 and the longitudinal and transverse prefabricated beams is achieved, ensuring continuous force transmission at the joint, improving the integrity and seismic performance of the frame structure, and is one of the core joint structures of prefabricated buildings.

[0071] In this embodiment, the first corbel 61 includes a T-shaped steel corbel and a channel-shaped steel corbel, that is, the beam-column joint connection structure 6 mainly consists of T-shaped steel corbels and channel-shaped steel corbels at the intersection of four beams and three beams, such as... Figures 8 to 17 As shown.

[0072] Figure 10 This is a detailed drawing of the T-shaped steel bracket structure at the intersection of four beams in this embodiment, showing the construction method of the four beams (cross-shaped intersection) at the node: through steel components such as T-shaped steel brackets and upper / lower rings, the rings also serve as stirrups, so that the four beams are rigidly connected to the node, ensuring the force transmission and structural integrity at the intersection. This is a core node technology structure of prefabricated reinforced concrete frame.

[0073] Figure 11 This is a detailed structural drawing of the first method for constructing the T-shaped steel bracket at the intersection of three beams in this embodiment. Figure 12 This is a detailed construction drawing of the second method for the three-beam intersection T-shaped steel bracket in this embodiment, showing the construction of the intersection node of the three beams, the difference being whether the T-shaped steel brackets are symmetrically arranged. Through the T-shaped steel brackets, in conjunction with upper and lower rings, which also serve as stirrups, a rigid connection between the three beams and the node is achieved, ensuring the force transfer and structural integrity at the intersection. This is a core node technology construction technique in prefabricated reinforced concrete frames.

[0074] Figure 13 The following is a detailed drawing of the T-shaped steel bracket in this embodiment, showing the structural details of the T-shaped steel bracket: The T-shaped steel bracket is provided with studs, stirrup holes, and 20mm diameter installation positioning holes 9. At the same time, the steel bar through-hole plug welding process is used to connect the steel bar and the steel component. With the help of these structures and processes, the T-shaped steel bracket can stably connect the precast beam and column, ensuring the stress performance of the prefabricated frame node.

[0075] Figure 14 The following is a detailed construction drawing of the four-beam intersection channel steel bracket construction in another embodiment, showing the construction of the four-beam intersection node: through the channel steel bracket, in conjunction with upper and lower ring sleeves and other steel components, the ring sleeves also serve as a stirrup, so that the four beams and the node are rigidly connected, ensuring the force transmission and structural integrity of the intersection, which is a core node technology construction of prefabricated reinforced concrete frame.

[0076] Figure 15 This is a detailed structural drawing of a third embodiment of a three-beam intersecting groove-type steel bracket. Figure 16 This is a detailed construction drawing of a second embodiment of the three-beam intersection channel steel bracket method, showing the construction of the intersection node of the three beams. The difference lies in whether the channel steel brackets are symmetrically arranged. By using the lower ring sleeve as a stirrup and upper / lower ring sleeves and other steel components, a rigid connection between the three beams and the node is achieved, ensuring the force transmission and structural integrity at the intersection. This is a core node technology construction technique of prefabricated reinforced concrete frames.

[0077] Figure 17 The detailed drawing of another embodiment of the channel steel bracket shows its structural details: the bracket is equipped with studs, stirrup holes, and 20mm diameter mounting positioning holes 9 to assist in precise assembly; the connection between the reinforcing bars and the steel bracket is achieved using a through-hole plug welding process. This type of channel steel bracket is used at beam-column joints in prefabricated reinforced concrete frames, which can enhance the connection performance between steel components and concrete and reinforcing bars, ensuring the stress and overall stability of the joint.

[0078] Further reference Figures 18 to 23 Preferred, such as Figure 18 As shown, the precast main beam 2 has pre-set installation grooves 7 and pouring bevels 8 at both ends. The installation grooves 7 mate with the horizontal flanges of the first bracket 61, and the pouring bevels 8 are used to fill grout. The horizontal flanges of the first bracket 61 and the installation grooves 7 are also provided with matching installation positioning holes 9. The portion of the first bracket 61 protruding from the side of the precast column 1 is trapezoidal or channel-shaped. The first bracket 61 includes T-shaped steel brackets and channel-shaped steel brackets. The installation grooves 7 mate with the trapezoidal or channel-shaped first bracket 61.

[0079] The mounting groove 7 mates with the flange of the first bracket 61, and the mounting positioning hole 9 is set to achieve precise alignment of the main beam and improve assembly efficiency. The pouring bevel 8 facilitates the full filling of the joint with grout, enhancing the overall connection integrity. Bolt fixing ensures the rigidity of the joint, and synergistically optimizes construction and stress performance. The first bracket 61 is designed as a trapezoid or groove shape and mates with the mounting groove 7 to enhance installation guidance and alignment accuracy, increase the contact area to improve shear resistance, and also assist in grout filling, optimizing the stress on the joint and construction efficiency.

[0080] Figure 19 for Figure 7 The detailed cross-sectional view of the central AA section shows the connection structure between the precast main beam 2 and the T-shaped steel bracket: the construction requirements are that the stirrup caps are laid on site, the beam surface reinforcement is laid on site, the pouring slant 8 is set, the installation positioning hole 9 of the composite beam is reserved, and the precast main beam 2 is filled with high-strength grout after installation. This is used to guide the on-site assembly and grouting construction of the prefabricated beam joint, and to ensure the firmness and overall stress of the joint connection.

[0081] Figure 20for Figure 7 The detailed cross-sectional view of another embodiment of the AA shows the connection structure between the precast main beam and the channel steel bracket: the construction requirements are that the stirrup caps are laid on site, the beam surface reinforcement is laid on site, the pouring slope 8 is set, the installation positioning hole 9 of the composite beam is reserved, and the high-strength grout is used to fill the gap after the precast main beam 2 is installed. This is used to guide the on-site assembly and grouting construction of the prefabricated beam node, and to ensure the firmness of the node connection and the overall structural stress.

[0082] Figure 21 For along Figure 7 The detailed cross-sectional view of the beam joint of the BB structure shows the connection and construction requirements of the beam reinforcement: the beam stirrups need to be enlarged by one grade and connected to the steel plate by through-hole plug welding or T-shaped butt welding; the longitudinal reinforcement of the beam adopts double-sided welding, and the stirrup caps also need to be tied on site to guide the reinforcement connection construction of the prefabricated beam joint and ensure the stress performance of the joint.

[0083] Figure 22 For along Figure 7 The detailed cross-sectional view of the beam joint in another embodiment of BB shows the joint construction of the beam and related components: the beam stirrups are connected to the steel plate by through-hole plug welding or T-shaped butt welding. The total height of the joint is 600mm and the width is 200mm. It also shows the collaborative relationship between the longitudinal reinforcement of the beam, the stirrup caps of the on-site construction and the concrete components. It is used to guide the reinforcement welding and component assembly construction of the prefabricated beam joint, and ensure the stability of the joint under stress and the firmness of the connection.

[0084] Figure 23 For along Figure 7 The detailed cross-sectional drawing of CC shows the component's cross-sectional dimensions, with a total height of 600mm and a width of 200mm, as well as the structural relationship of the internal steel bars and concrete. This drawing is used to guide the construction and assembly of prefabricated nodes, ensuring the integrity and dimensional accuracy of the component connections.

[0085] Further preferred, such as Figure 24 and Figure 25 As shown, a second corbel 14 protrudes from one or both sides of the precast main beam with corbels. A reinforcing bar 15 is vertically installed on the second corbel 14. The connector is a boss 16 that mates with the second corbel 14. The boss 16 is located at the end of the precast secondary beam 3, and it has a built-in insertion hole 17 for the reinforcing bar 15. The precise fit between the second corbel 14 and the boss 16 on the secondary beam, and the reinforcing bar 15 and insertion hole 17, allows for rapid positioning of the secondary beam, enhances vertical force transmission and shear resistance, facilitates construction, and improves the overall integrity of the main and secondary beam joints.

[0086] Figure 26 Details of the primary and secondary beam connection nodes in this embodiment Figure 1 Includes sectional views, detailing the construction of the connection nodes between main beams and secondary beams in prefabricated concrete structures:

[0087] The concrete bodies of the precast main beam 2 and precast secondary beam 3 are displayed, as well as the cast-in-place concrete composite layer at the top of the node—the composite layer is combined with the precast beam to enhance the overall structure.

[0088] A 20mm diameter reinforcing bar runs through the joint area, working with other reinforcing bars to transfer the load; the gap between the beam support and the bottom of the beam is sealed with grout to avoid weak points and ensure the continuity of load transfer at the joint.

[0089] The DD cross-sectional view (planar intersection perspective) shows that the component layout consists of a precast main beam 2 in the middle, with precast secondary beams 3 symmetrically connected on the left and right sides, forming a cross-shaped intersection node.

[0090] Reinforcing steel and structural components: The main beam is equipped with main beam stirrups, and the secondary beam is equipped with additional stirrups to enhance the shear resistance of the joint; 20mm diameter lifting bars are set in the secondary beams to assist on-site hoisting and participate in the joint stress; 1520mm metal corrugated pipes serve as channels for rebar splicing or grouting to ensure the accuracy of rebar connection.

[0091] Figure 27 Details of the primary and secondary beam connection nodes in this embodiment Figure 2 The construction of the connection node between the precast main beam 2 and the precast secondary beam 3 is shown in detail:

[0092] The vertical structure of each node is shown, including the composite layer of cast-in-place concrete, the spatial arrangement of various steel bars (such as 20mm stirrups), and the gap between the beam support and the bottom of the beam is sealed with grout. It is used to guide the prefabrication and on-site assembly of prefabricated main and secondary beam nodes, ensuring the firmness of the node connection and the integrity of the structure.

[0093] The FF section view shows the planar intersection relationship between the main beam (with main beam stirrups and additional stirrups) and the secondary beam. The secondary beam is equipped with 20mm diameter stirrups and 1520mm metal corrugated pipes (for auxiliary reinforcement connection or grouting).

[0094] Reference Figures 28 to 31 The column-to-column connection embedded part 5 is a frame-shaped steel component. Each of the four corners of the column-to-column connection embedded part 5 is equipped with a reinforcing bolt connector 10. The column-to-column connection embedded part 5 is also equipped with a grouting sleeve 11 for connecting with the longitudinal reinforcement of the precast column 1. After the longitudinal reinforcement of the precast column 1 is inserted into the grouting sleeve 11, the connection is achieved by filling with grout. The frame-shaped steel component provides overall rigidity. The four corner reinforcing bolt connectors 10 and the grouting sleeve 11 work together to achieve a double connection of the column's longitudinal reinforcement: the grouting sleeve 11 ensures continuous vertical force transmission, the frame structure assists in positioning, improves installation accuracy and connection reliability, and adapts to the requirements of support-free construction.

[0095] Figure 28The detailed structural drawing of the precast column base in this embodiment shows the connection and structural design of the column base: a grouting sleeve 11 and a steel bolt connector 10 are provided to connect the longitudinal reinforcement of the precast column 1; a shear groove is provided in the middle of the column base to enhance the shear resistance; the longitudinal reinforcement at the column foot uses large-diameter steel bars as much as possible. These structures together ensure the firmness and reasonable stress distribution of the connection between the precast column 1 and the substructure.

[0096] Figure 29 , Figure 30 and Figure 31 This is a detailed drawing of a rebar bolt connector. The material is 45# steel, and the internal components include a lock nut, a fastening nut, and a washer. It can connect rebars or anchor bolts with diameters of 22, 25, 28, and 32, and guides the construction of rebar bolt connections between upper and lower precast columns 1 or between precast column 1 and column base, ensuring a firm and accurate connection.

[0097] Further preferred options are those that refer to... Figures 32 to 35 The composite ribbed slab 4 includes a precast base plate 12 and steel support embedded parts 13, which are steel clips welded and fixed to the ends of the precast base plate 12. The steel clips have a snap-fit ​​structure that cooperates with the embedded steel plates on the precast main beam 2, allowing the composite ribbed slab 4 to be fixed in place by the snap-fit ​​structure when erected on the precast main beam 2. The steel clips are firmly welded to the precast base plate 12, and their snap-fit ​​structure cooperates with the embedded steel plates on the main beam, achieving rapid positioning and fixing of the slab without the need for temporary supports, improving installation accuracy and efficiency, and enhancing the overall connection between the slab and the beam, thus meeting the requirements of support-free construction.

[0098] The composite ribbed slab 4 also includes hybrid ribs 19 and a surface steel mesh 20. The hybrid ribs 19 contain rib-shaped steel trusses, which include upper chords, lower chords, and web reinforcement. The lower chords are welded to the upper layer of reinforcement in the precast base slab 12, and the upper chords are tied or welded to the surface steel mesh 20. Steel clamps are welded to the ends of the lower chords. The rib-shaped steel trusses are connected to the precast base slab 12 and the surface steel mesh 20 via chords, forming an integrated load-bearing system. The steel clamps are welded to the lower chords for enhanced support, improving the overall integrity and load-bearing capacity of the composite slab.

[0099] Figure 34 This is a schematic diagram of the first method of connecting the composite ribbed slab and the composite beam in this embodiment, showing the connection node between the single-sided precast main beam 2 and the composite slab: the bottom of the steel support embedded part 13 can be set with a support pad, showing the steel reinforcement structure and the position of the embedded part, guiding the on-site assembly, the steel reinforcement connection of the single-sided composite beam and the composite slab, and the work of the embedded parts to ensure the integrity of the node.

[0100] Figure 35This is a schematic diagram of the second method for connecting the composite ribbed slab and the composite beam in this embodiment, showing the connection node between the precast secondary beam 3 on both sides (or multiple beam intersection scenarios) and the composite slab: the bottom of the steel support embedded part 13 can also be set with a support pad. By setting short bars and embedded parts, it is suitable for more complex beam-slab connection conditions, ensuring the force transmission and overall structural stability when multiple beams are connected to the composite slab.

[0101] The drawings of this utility model embodiment are used to guide the factory prefabrication (embedded parts, component dimensional accuracy) and on-site assembly (node ​​connection construction) of composite slabs and composite beams in prefabricated buildings, ensuring the connection firmness of beam-slab nodes and the overall structural integrity.

[0102] The prefabricated reinforced concrete frame structure with steel component connection disclosed in this utility model achieves the "strong node" construction requirements of the prefabricated frame through the coordinated construction of factory prefabrication and precise on-site assembly, grouting and steel reinforcement connection, ensuring the integrity and seismic performance of the structure.

[0103] The specific embodiments of this utility model have been described above, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A prefabricated reinforced concrete frame structure with steel component connections, characterized in that, include: Precast columns are used to provide vertical support. During the precasting process, a connection structure that cooperates with the column connection embedded parts is pre-embedded at the end of the precast column. The precast main beam includes a precast main beam without corbels and a precast main beam with corbels, wherein the precast main beam is connected to the precast column through a beam-column joint connection structure; A precast secondary beam is provided at the end of the precast secondary beam, which is connected to the precast main beam. The precast secondary beam is provided with a connector that matches the precast main beam. A composite ribbed slab, wherein steel support embedded parts are provided at the ends of the composite ribbed slab, and the slab is supported on the precast main beam and precast secondary beam through the steel support embedded parts; and The column-to-column connector is used to connect the upper and lower precast columns or the precast columns and column bases, so that the upper and lower precast columns, after assembly, form a stable vertical force-bearing system with the column bases.

2. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The beam-column joint connection structure includes a first corbel and a steel embedded part. The first corbel protrudes from the side of the precast column, and the steel embedded part is embedded in the end of the precast main beam. The horizontal flange of the first corbel is fixed to the steel embedded part by bolts or welding.

3. The prefabricated reinforced concrete frame structure according to claim 2, characterized in that, The precast main beam has pre-set installation grooves and pouring inlets at both ends. The installation grooves are matched with the horizontal flanges of the first corbel, and the pouring inlets are used to fill grout. The horizontal flanges of the first corbel and the installation grooves are also provided with matching installation positioning holes.

4. The prefabricated reinforced concrete frame structure according to claim 3, characterized in that, The portion of the first bracket protruding from the side of the precast column is trapezoidal or channel-shaped. The first bracket includes T-shaped steel brackets and channel-shaped steel brackets. The mounting groove mates with the trapezoidal or channel-shaped first bracket.

5. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The column-to-column connection embedded part is a frame-shaped steel component. Each of the four corners of the column-to-column connection embedded part is provided with a steel bar bolt connector. The column-to-column connection embedded part is also provided with a grouting sleeve for connecting with the longitudinal reinforcement of the precast column. After the longitudinal reinforcement of the precast column is inserted into the grouting sleeve, the connection is achieved by filling with grout.

6. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The composite ribbed slab includes a precast base plate. The steel support embedded part is a steel clip that is welded and fixed to the end of the precast base plate. The steel clip is provided with a buckle structure that cooperates with the embedded steel plate on the precast main beam, so that the composite ribbed slab is limited and fixed by the buckle structure when it is erected on the precast main beam.

7. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The precast main beam with corbels has a second corbel protruding from one or both sides of its side wall. The second corbel has a vertically arranged reinforcing bar. The connector is a boss that mates with the second corbel. The boss is located at the end of the precast secondary beam. The boss has a built-in insertion hole that mates with the reinforcing bar.

8. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The beam-column joint connection structure also includes cross reinforcement bars, which are used to connect the longitudinal reinforcement bars of the precast column.

9. The prefabricated reinforced concrete frame structure according to claim 6, characterized in that, The composite rib slab further includes mixed ribs and surface steel mesh. The mixed ribs are provided with rib steel trusses, which include upper chord bars, lower chord bars and web bars. The lower chord bars are welded and fixed to the upper layer of steel bars of the precast base slab. The upper chord bars are tied or welded to the surface steel mesh, and the steel clamps are welded to the ends of the lower chord bars.

10. The prefabricated reinforced concrete frame structure according to claim 1, characterized in that, The prefabricated reinforced concrete frame structure is designed to have at least three floors.

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