Beam, column and column connecting joint structure of fabricated building

Abstract

The utility model provides a kind of beam, column and column connecting node structure of assembly type building, including intercolumnar connecting node and beam-column connecting node. Intercolumnar connecting node is inserted with mortise and tenon component on the bottom of prefabricated concrete upper column and the top of lower column, and is fixed using bolt, and the reserved gap is convenient for perpendicularity adjustment, and post-cast high-strength concrete forms steel reinforced concrete stress component. Beam-column connecting node embeds box-shaped steel pipe at the end of prefabricated upper column, and the side wall is welded with U-shaped steel mortise, and prefabricated beam end embeds T-shaped steel tenon into mortise and is connected by bolt, and the node is supported formwork cast-in-place concrete. Each connecting position is provided with over-pouring groove to ensure the compactness of concrete. The structure significantly improves shear capacity and ductility through steel-concrete collaborative work, and uses modular prefabrication and high-strength bolt connection to realize rapid assembly, high construction precision, reliable connection, effectively solving the problems of insufficient bearing capacity of existing assembly type node, difficult adjustment and non-compact cast-in-place.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated buildings, specifically to a beam-column connection node structure for prefabricated buildings. Background Technology

[0002] With the continuous advancement of industrialized construction and green building concepts, prefabricated concrete structures have been widely used in multi-story and high-rise buildings due to their advantages such as fast construction speed, less on-site wet work, and controllable quality. In prefabricated building systems, the connection nodes between prefabricated components are key parts that determine the overall structural safety and reliability.

[0003] Currently, traditional prefabricated connection nodes mostly adopt the following methods: Sleeve grouting connection: Grouting and anchoring are carried out by pre-embedded metal sleeves and steel bars, but it has extremely high requirements for grout density. Once voids or insufficient grouting occur, the bearing capacity of the joint will be seriously affected. Post-cast concrete joints: After the precast components are assembled, formwork is erected in the joint area and concrete is poured on-site. Although the overall integrity is good, the amount of wet work on site is large, the construction period is long, and it is difficult to ensure effective bonding between the new and old concrete interfaces. Pure bolt or welded steel connectors: Although easy to install, they often lack an effective concrete-cooperative stress mechanism, resulting in poor joint ductility and insufficient shear resistance, making them prone to brittle failure under dynamic loads such as earthquakes.

[0004] In addition, existing prefabricated nodes generally have the following technical problems: Traditional mortise and tenon or plug-in joints lack effective limiting and shear-resistant structures, and cannot resist complex stress states by relying solely on friction or a small number of bolts; if there are manufacturing or installation errors when precast column segments are joined, it is difficult to make fine adjustments to the verticality on site, affecting the overall structural accuracy; there is a lack of effective anchoring and stress transfer paths between steel structure connectors and concrete, which cannot fully utilize the composite stress-bearing advantages of steel-concrete composite structures. Therefore, there is an urgent need for a connection node structure that can achieve rapid assembly, high load-bearing capacity, good ductility, and reliable construction adaptability, in order to overcome the defects of the existing technologies. Utility Model Content

[0005] The main objective of this invention is to provide a beam-column connection node structure for prefabricated buildings, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: including a column connection node for connecting precast concrete upper column and precast concrete lower column, and a beam-column connection node for connecting precast concrete beam on the precast concrete upper column. The lower end of the box-shaped steel pipe in the beam-column connection node is embedded in the precast concrete upper column. A steel mortise is fixed on the side of the box-shaped steel pipe opposite to the precast concrete beam. A steel tenon is embedded at the end of the precast concrete beam. The steel tenon is inserted into the steel mortise for tenon-tenon connection and is fixed by multiple bolts. In the column connection node, the tenon and mortise components are pre-embedded at the opposite end of the precast concrete upper column and the precast concrete lower column, respectively. The tenon component is inserted into the mortise component for tenon and mortise connection, and is fixed by multiple bolts that are interlaced.

[0007] Preferably, one end of the steel tenon is an I-beam structure including an upper flange plate, a lower flange plate, and a web plate connecting the two. It is welded and fixed to the longitudinal reinforcement of the precast concrete beam and integrally cast into the concrete. The other end extends out of the precast concrete beam end and is a T-shaped structure including an upper flange plate and a web plate. Its web plate is inserted into the steel mortise, and the upper flange plate is welded and fixed against the steel mortise.

[0008] Preferably, the steel mortise is a U-shaped structure including two webs on the left and right sides and a lower flange plate connecting the two. Its ends are welded to the side wall of the box-shaped steel pipe. The web of the steel tenon is inserted between the two webs in the steel mortise, and the upper flange plate of the steel tenon is welded and fixed against the two webs in the steel mortise.

[0009] Preferably, the web of the steel tenon and the left and right webs of the steel mortise are provided with multiple corresponding through slots, and the steel tenon and the steel mortise are fixedly connected by inserting multiple bolts into the through slots.

[0010] Preferably, the bottom of the web of the steel tenon and the top of the left and right webs of the steel mortise are provided with grouting grooves for later sealing of the flow of cast-in-place concrete at the beam-column connection joint.

[0011] Preferably, the lower half of the box-shaped steel pipe is welded with longitudinal reinforcement bars from the precast concrete upper column, and is integrally cast with the precast concrete upper column. A fixed steel plate is fixed inside the top of the box-shaped steel pipe for connecting and installing small roof columns.

[0012] Preferably, a positioning steel plate is fixed in the middle of the tenon component, and multiple reinforcing ribs are fixed between the upper periphery of the positioning steel plate and the tenon component. The longitudinal reinforcement in the precast concrete upper column is welded to the tenon component and the reinforcing ribs, and is integrally cast with the precast concrete upper column. The lower half of the mortise and tenon component is embedded in the precast concrete lower column and welded and fixed to it with the longitudinal reinforcement to form a whole.

[0013] Preferably, the tenon and mortise components are square structures, the tenon component is inserted into the mortise component, and the positioning steel plate abuts against the mortise component and is welded and fixed. The tenon and mortise components have multiple corresponding through slots on their periphery, and the tenon and mortise components are fixedly connected by bolts inserted into the through slots.

[0014] Preferably, a grouting pipe and an exhaust pipe are pre-embedded between the exterior of the precast concrete column and the interior of the tenon component. Concrete is poured in place through the grooving pipe box mortise component and the tenon component. A grouting groove is provided on the periphery of the end of the tenon component for the flow of the poured concrete.

[0015] This utility model provides a beam-column connection node structure for prefabricated buildings, with the following advantages: 1. Enhanced shear capacity and ductility: Through the synergistic work of steel and concrete, especially by casting high-strength concrete in place at key nodes to form steel-concrete composite structural members, the shear capacity and ductility of the overall building frame are significantly improved.

[0016] 2. Improve construction efficiency and quality control. The use of prefabricated modular installation allows for rapid assembly of components on the construction site, reducing the amount of wet work on site, increasing construction speed, and improving the overall quality of the construction project because the quality of prefabricated components can be strictly controlled in the factory.

[0017] 3. High-strength bolts were used to secure all key components, ensuring the robustness and stability of the connections and extending the building's service life. Considering the need for vertical adjustment between the precast concrete lower and upper columns, a gap was left at the connection point, allowing for precise alignment through fine-tuning during construction, thus guaranteeing the overall verticality and stability of the building. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a utility model Figure 1 Exploded perspective view; Figure 3 This is a utility model Figure 2 Axonometric view; Figure 4 This is a utility model Figure 1 Exploded axonometric view; Figure 5 This is an exploded axonometric view of the beam-column connection node of this utility model; In the diagram: 1. Precast concrete lower column; 2. Precast concrete upper column; 3. Column connection node; 301. Tenon component; 302. Positioning steel plate; 303. Reinforcing rib; 4. Beam-column connection node; 401. Box steel pipe; 402. Steel mortise; 403. Steel tenon; 404. Fixing steel plate; 5. Precast concrete beam. Detailed Implementation

[0019] like Figures 1-5 As shown, a beam-column connection node structure for a prefabricated building includes an inter-column connection node 3 for connecting a precast concrete upper column 2 and a precast concrete lower column 1, and a beam-column connection node 4 for connecting a precast concrete beam 5 on the precast concrete upper column 2. In beam-column connection node 4, the box-shaped steel pipe 401 is pre-embedded at the end of the precast concrete upper column 2. The lower end of the box-shaped steel pipe 401 is pre-embedded in the precast concrete upper column 2 and integrally cast. A fixing steel plate 404 is welded to the upper end of the box-shaped steel pipe 401, which is used to connect and install the small roof column. The bottom of the small column is welded and fixed to the fixing steel plate 404. Steel mortises 402 are welded and fixed to the periphery of the box-shaped steel pipe 401 at the corresponding positions of the precast concrete beam 5. The steel tenons 403 pre-embedded at the end of the precast concrete beam 5 are inserted into the steel mortises 402 for tenon-and-mortise connection and fixed by through bolts. Thus, the steel structure of the precast concrete beam 5 and the precast concrete upper column 2 are fixedly connected. After the overall building frame structure is fixed, formwork is required at the connection node, and high-strength concrete is poured in place to form a steel-concrete composite load-bearing member at the node.

[0020] Based on the building's floor height, the columns are divided into multiple precast concrete lower columns 1 and precast concrete upper columns 2, connected by inter-column connection nodes 3. At opposite ends of the connection nodes, tenon members 301 and mortise members 302 are pre-embedded. The tenon member 301 at the bottom of the precast concrete upper column 2 is inserted into the mortise member 302 at the top of the precast concrete lower column 1, forming a tenon-and-mortise connection, and is then fixed by through bolts. This achieves the butt joint fixation between the precast concrete lower column 1 and the precast concrete upper column 2. After the overall building frame steel structure is fixed, formwork is erected at the connection nodes, and high-strength concrete is poured in place to form steel-concrete composite load-bearing members at the nodes. The inter-column connection nodes 3 are located 0.9~1.2m above the central axis elevation of the inter-floor beams.

[0021] Preferably, one end of the steel tenon 403 is an I-beam structure including an upper flange plate, a lower flange plate, and a web plate connecting the two. It is welded and fixed to the longitudinal reinforcement of the precast concrete beam 5 and integrally cast into the concrete. The other end extends out of the precast concrete beam 5 and is a T-shaped structure including an upper flange plate and a web plate. Its web plate is inserted into the steel mortise 402, and the upper flange plate is welded and fixed against the steel mortise 402. The steel mortise 402 is a U-shaped structure including two web plates and a lower flange plate connecting the two. Its end is welded to the side wall of the box-shaped steel pipe 401. The web plate of the steel tenon 403 is inserted between the two web plates in the steel mortise 402, and the upper flange plate of the steel tenon 403 is welded and fixed against the two web plates in the steel mortise 402. The web of the steel tenon 403 and the left and right webs of the steel mortise 402 have multiple corresponding through slots, which are fixedly connected by inserting multiple bolts into the through slots.

[0022] In a further preferred embodiment, the bottom of the web of the steel tenon 403 and the top of the left and right webs of the steel mortise 402 are provided with grouting grooves for the flow of cast-in-place concrete at the beam-column connection node 4 in the later stage.

[0023] The lower half of the box-shaped steel pipe 401 is welded with longitudinal reinforcement bars inside the precast concrete upper column 2, and is integrally cast with the precast concrete upper column 2; a fixing steel plate 404 is welded inside the top of the box-shaped steel pipe 401 for connecting and installing the small roof column.

[0024] Preferably, a positioning steel plate 303 is welded to the middle of the tenon member 301, and multiple reinforcing ribs 304 are welded between the upper periphery of the positioning steel plate 303 and the tenon member 301. The longitudinal reinforcement in the precast concrete upper column 2 is welded to the tenon member 301 and the reinforcing ribs 304, and is integrally cast with the precast concrete upper column 2. The lower half of the mortise member 302 is embedded in the precast concrete lower column 1, and is welded and fixed with its longitudinal reinforcement and integrally cast.

[0025] The tenon component 301 and the mortise component 302 are square structures. The tenon component 301 is inserted into the mortise component 302, and the positioning steel plate 303 abuts against the mortise component 302 and is welded and fixed. The tenon component 301 and the mortise component 302 have multiple corresponding through slots on their periphery. The tenon component 301 and the mortise component 302 are fixedly connected by bolts inserted into the through slots.

[0026] A grouting pipe and an venting pipe are pre-embedded between the exterior of the precast concrete upper column 2 and the interior of the tenon member 301. Concrete is poured in place through the grouting pipe box mortise member 302 and the tenon member 301. A grouting groove is provided on the periphery of the end of the tenon member 301 for the flow of the poured concrete. There is a gap between the tenon member 301 and the mortise member 302 for adjusting the verticality of the precast concrete lower column 1 and the precast concrete upper column 2. After the steel structure is locked, high-strength concrete is poured into the gap to form a steel-concrete composite load-bearing member.

[0027] The aforementioned connection nodes work together with the steel-concrete composite structure to improve shear capacity and ductility; the steel structures are fixed together with high-strength shear bolts, ensuring reliable fixation and long service life; the prefabricated modular installation of the prefabricated building system results in high on-site construction efficiency and easy quality control.

[0028] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A beam-column connection node structure for prefabricated buildings, characterized in that: It includes a column connection node (3) for connecting the precast concrete upper column (2) and the precast concrete lower column (1), and a beam-column connection node (4) for connecting the precast concrete upper column (2) to the precast concrete beam (5). The lower end of the box-shaped steel pipe (401) in the beam-column connection node (4) is embedded in the precast concrete upper column (2). A steel mortise (402) is fixed on the side of the box-shaped steel pipe (401) opposite to the precast concrete beam (5). A steel tenon (403) is embedded at the end of the precast concrete beam (5). The steel tenon (403) is inserted into the steel mortise (402) for tenon-tenon connection and fixed by multiple bolts. The tenon component (301) and the mortise component (302) in the column connection node (3) are respectively embedded in the opposite end of the precast concrete upper column (2) and the precast concrete lower column (1). The tenon component (301) is inserted into the mortise component (302) for tenon and mortise connection, and is fixed by multiple bolts that are intersected and inserted.

2. The beam-column connection node structure of a prefabricated building according to claim 1, characterized in that: steel One end of the tenon (403) is an I-beam structure including an upper flange plate, a lower flange plate and a web plate connecting the two. It is welded and fixed to the longitudinal reinforcement of the precast concrete beam (5) and cast integrally into the concrete. The other end extends out of the precast concrete beam (5) and is a T-shaped structure including an upper flange plate and a web plate. Its web plate is inserted into the steel mortise (402), and the upper flange plate is welded and fixed against the steel mortise (402).

3. The beam-column and column connection node structure of a prefabricated building according to claim 2, characterized in that: The steel mortise (402) is a U-shaped structure including two webs on the left and right and a lower flange plate connecting the two. Its end is welded to the side wall of the box-shaped steel pipe (401). The web of the steel tenon (403) is inserted between the two webs in the steel mortise (402). The upper flange plate of the steel tenon (403) is welded and fixed against the two webs in the steel mortise (402).

4. The beam-column connection node structure of a prefabricated building according to claim 3, characterized in that: steel The web of the tenon (403) and the left and right webs of the steel mortise (402) are provided with multiple corresponding through slots, and the steel tenon (403) and the steel mortise (402) are fixedly connected by inserting multiple bolts into the through slots.

5. A beam-column connection node structure for prefabricated buildings according to claim 2 or 3, characterized in that: steel The bottom of the web in the tenon (403) and the top of the left and right webs in the steel mortise (402) are provided with grouting grooves for later sealing of the cast-in-place concrete flow at the beam-column connection node (4).

6. The beam-column-column connection node structure of a prefabricated building according to claim 1, characterized in that: The lower half of the box-type steel pipe (401) is welded with longitudinal reinforcement inside the precast concrete upper column (2) and is integrally cast with the precast concrete upper column (2). A fixed steel plate (404) is fixed inside the top of the box-type steel pipe (401) for connecting and installing small roof columns.

7. The beam-column and column connection node structure of a prefabricated building according to claim 1, characterized in that: A positioning steel plate (303) is fixed in the middle of the tenon component (301), and multiple reinforcing ribs (304) are fixed between the upper periphery of the positioning steel plate (303) and the tenon component (301). The longitudinal reinforcement in the precast concrete upper column (2) is welded to the tenon component (301) and the reinforcing ribs (304), and is integrally cast with the precast concrete upper column (2). The lower half of the mortise groove component (302) is embedded in the precast concrete lower column (1) and welded and fixed with its longitudinal reinforcement to form a whole.

8. The beam-column and column connection node structure of a prefabricated building according to claim 7, characterized in that: The tenon component (301) and the mortise component (302) are square structures. The tenon component (301) is inserted into the mortise component (302), and the positioning steel plate (303) abuts against the mortise component (302) and is welded and fixed. The tenon component (301) and the mortise component (302) are provided with multiple corresponding through slots on their periphery, and the tenon component (301) and the mortise component (302) are fixedly connected by inserting bolts into the through slots.

9. The beam-column connection node structure of a prefabricated building according to claim 7, characterized in that: A grouting pipe and an exhaust pipe are pre-embedded between the exterior of the precast concrete column (2) and the interior of the tenon component (301). Concrete is poured in place through the grooving pipe box mortise component (302) and the tenon component (301). A grouting groove is provided on the periphery of the end of the tenon component (301) for the flow of the poured concrete.

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