A beam-column connecting joint of a steel-bamboo composite component and a construction method thereof

Abstract

This invention discloses a beam-column connection node of a steel-bamboo composite component and its construction method, mainly relating to the field of building structure engineering technology; it includes: an ECC steel pipe inorganic adhesive composite bamboo composite column; a steel inorganic adhesive composite bamboo beam; a connecting component for connecting the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns and the side steel inorganic adhesive composite bamboo beam into one unit; a constraint shell, wrapped around the outside of the connecting component, the outer wall of the constraint shell is provided with several I-beam grooves adapted to the I-beams, the constraint shell includes two shell units, the two shell units are symmetrically arranged; this invention can comprehensively improve the compressive strength, fire resistance, and corrosion resistance of the composite bamboo column, give full play to the performance advantages of each material; simplify the connection process of the upper and lower columns; enhance the integrity and force transmission efficiency of the column-beam connection node; avoid local stress concentration at the connection point; reduce on-site wet work and improve construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of building structure engineering technology, specifically to a beam-column connection node of a steel-bamboo composite component and its construction method. Background Technology

[0002] Bamboo, as a renewable and environmentally friendly building material, boasts significant advantages such as lightweight, high strength, readily available raw materials, and low carbon emissions, aligning perfectly with the development needs of modern industrialized construction and green building. Inorganic adhesive composite bamboo, through the modification and composite application of natural bamboo using inorganic cementitious materials, effectively improves the poor fire resistance of traditional bamboo and wood materials, leading to its gradual application in building structural components. In building structures, column-beam connections, as core load-bearing components, directly determine the overall load-bearing capacity, stability, and service life of bamboo composite structures due to their connection form, integrity, and ease of construction. This represents a key technical challenge in the engineering application of inorganic adhesive composite bamboo structures.

[0003] Currently, the column-beam connections and component designs of existing inorganic adhesive composite bamboo structures still have many problems, making it difficult to meet actual engineering needs: Firstly, the compressive strength of pure inorganic adhesive composite bamboo columns is insufficient, and their use alone cannot meet the long-term load-bearing and durability requirements of building structures. Simple external protection measures are also insufficient to achieve synergistic improvement of various performance characteristics. Secondly, the existing steel pipe-rubber composite bamboo column design has problems with poor fire resistance and corrosion resistance, the material performance advantages are not fully utilized, the connection structure between the upper and lower columns is complicated, the installation and positioning are difficult, there is a lack of dedicated positioning and connection structures, and the construction efficiency is low. Third, the connection nodes between inorganic adhesive composite bamboo beams and composite bamboo columns mostly adopt traditional bolt direct connection or simple welding methods, lacking dedicated connection devices, resulting in low positioning accuracy, inconvenient installation, poor overall integrity of the connection nodes, unsmooth force transmission, and easy local stress concentration. Fourth, the lack of effective restraint structures at the column-beam connection points makes it easy for the protective materials to form poorly and not bond tightly with the components during subsequent pouring, resulting in poor corrosion and crack protection at the connection points and affecting the service life of the structure. Fifth, the existing column-beam connection construction process is cumbersome, involves a lot of wet work on site, has a low degree of prefabrication, and the arrangement of the pre-embedded connectors in the beam is unreasonable, which can easily lead to interference problems when connecting columns and beams, further increasing the difficulty of construction.

[0004] In summary, the existing component design and column-beam connection methods of inorganic adhesive composite bamboo structures are no longer suitable for the development needs of modern green prefabricated buildings. There is an urgent need for a composite bamboo composite column, composite beam and its dedicated connection method that takes into account the improvement of the overall performance of components, the integrity of column-beam connection nodes, convenient installation and construction, and the synergistic performance of various materials. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a beam-column connection node of steel-bamboo composite components and its construction method, which can comprehensively improve the compressive strength, fire resistance and corrosion resistance of composite bamboo columns, give full play to the performance advantages of each material; simplify the connection process of upper and lower columns; enhance the integrity and stress transmission efficiency of the column-beam connection node; avoid local stress concentration at the connection point; reduce on-site wet work and improve construction efficiency.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A beam-column connection node for a steel-bamboo composite component includes: ECC steel pipe inorganic adhesive composite bamboo composite column, the ECC steel pipe inorganic adhesive composite bamboo composite column includes inorganic adhesive composite bamboo column, steel pipe sleeved on inorganic adhesive composite bamboo column and ultra-high ductility cement-based composite material (ECC) shell cast on the outside of steel pipe; The steel-inorganic adhesive composite bamboo beam includes an inorganic adhesive composite bamboo beam and an I-beam embedded in the inorganic adhesive composite bamboo beam. The I-beam penetrates the inorganic adhesive composite bamboo beam longitudinally. A connecting component is used to connect the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns and the side steel inorganic adhesive composite bamboo beam into one unit. The connecting component includes a connecting sleeve and several connecting parts fixed to the outer wall of the connecting sleeve. The bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve; the top end of the inorganic adhesive composite bamboo column of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve, or the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is fixedly connected to the connecting sleeve; the connecting parts are connected to the I-beams by a first bolt. The constraint shell is wrapped around the outside of the connecting component. The outer wall of the constraint shell is provided with a plurality of I-beam grooves adapted to the I-beam, and a vertical connecting plate extending outward is provided in the vertical part of the I-beam groove. The vertical connecting plate is connected to the I-beam by a second bolt. The constraint shell includes two shell units, which are symmetrically arranged.

[0007] Preferably, the high-ductility cement-based composite (ECC) shell is reinforced with longitudinal steel bars and matching confining stirrups to form a complete reinforcement and confining system.

[0008] Preferably, the ends of the inorganic adhesive composite bamboo beams are pre-embedded with connecting screws, and the ECC steel pipe inorganic adhesive composite bamboo composite columns, connecting components, and constraint shells are all provided with mounting holes adapted to the connecting screws.

[0009] Preferably, the connecting part includes two horizontal connecting plates, and the I-beam is located between the upper and lower horizontal connecting plates.

[0010] Preferably, a guide portion adapted to the web of the I-beam is provided between the upper and lower horizontal connecting plates, and the guide portion is provided with a guide groove adapted to the web of the I-beam.

[0011] Preferably, the connecting component is disposed on the lower ECC steel pipe inorganic adhesive composite bamboo composite column, the height of the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is higher than the inorganic adhesive composite bamboo column, and the part of the steel pipe that is higher than the inorganic adhesive composite bamboo column serves as the connecting sleeve of the connecting component; the bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column extends downward from the steel pipe, and the bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve.

[0012] Preferably, the outer surface of the constraint shell is coplanar with the outer surface of the ultra-high ductility cement-based composite (ECC) shell, and the thickness of the steel plate of the constraint shell is less than the thickness of the ultra-high ductility cement-based composite (ECC) shell.

[0013] Preferably, the connecting component is disposed between the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns. The projection of the connecting sleeve on the end face of the ECC steel pipe inorganic adhesive composite bamboo composite column is located inside the end face of the inorganic adhesive composite bamboo column. The end of the inorganic adhesive composite bamboo column near the connecting sleeve is provided with a tenon adapted to the connecting sleeve, and a connecting hole for fixing the constraint shell is provided at the end of the inorganic adhesive composite bamboo column near the connecting sleeve.

[0014] Secondly, the present invention also provides a construction method for beam-column connection nodes of steel-bamboo composite components, comprising the following steps: S1. After the lower ECC steel pipe inorganic adhesive composite bamboo combination column is installed, insert the bottom end of the upper ECC steel pipe inorganic adhesive composite bamboo combination column into the connecting sleeve. S2. Connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the outer shell unit; S3. Insert the pre-embedded connecting screws on the steel inorganic adhesive composite bamboo beam in the front and rear directions into the connecting sleeve, the inorganic adhesive composite bamboo column and its corresponding mounting holes, and then connect and fix the steel inorganic adhesive composite bamboo beam in the front and rear directions to the corresponding connecting parts. S4. Insert the pre-embedded connecting screws on the steel inorganic adhesive composite bamboo beams in the left and right directions into the connecting sleeves, inorganic adhesive composite bamboo columns and their corresponding mounting holes. Then connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the corresponding connecting parts, and connect and fix the constraint shell to the steel inorganic adhesive composite bamboo beams in the front and back directions. S5. After the connection is completed, cement-based composite material is poured at the ends of the steel inorganic adhesive composite bamboo beam, between the constraint shell and the connecting sleeve.

[0015] Thirdly, the present invention also provides a construction method for beam-column connection nodes of steel-bamboo composite components, comprising the following steps: S1. After the lower ECC steel pipe inorganic adhesive composite bamboo composite column is installed, insert the tenon at the top of the lower ECC steel pipe inorganic adhesive composite bamboo composite column into the connecting sleeve of the connecting component. S2. Connect and fix the steel-inorganic adhesive composite bamboo beams in the left and right directions to the outer shell unit, and at the same time connect and fix the steel-inorganic adhesive composite bamboo beams in the front and back directions to the corresponding connecting parts. S3. Connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the corresponding connecting parts, and connect and fix the constraint shell to the steel inorganic adhesive composite bamboo beams in the front and back directions. At the same time, fix the constraint shell to the lower ECC steel pipe inorganic adhesive composite bamboo combination column. S4. After the connection is completed, cement-based composite material is poured on the outside of the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column, the inside of the constraint shell, the outside of the constraint shell, and the end of the steel inorganic adhesive composite bamboo beam. The pouring height of the cement-based composite material inside the constraint shell is the same as the height of the connecting parts. S5. Insert the tenon at the bottom of the upper ECC steel pipe inorganic adhesive composite bamboo composite column into the connecting sleeve, then fix the upper ECC steel pipe inorganic adhesive composite bamboo composite column to the constraint shell, and finally cast ECC on the outside of the steel pipe of the upper steel bamboo composite bamboo column.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention integrates steel pipes, cement-based composite materials, and inorganic adhesive composite bamboo into a single design, thereby comprehensively improving the compressive strength, fire resistance, and corrosion resistance of composite bamboo columns and fully leveraging the performance advantages of each material.

[0017] 2. This invention optimizes the steel pipe structure dimensions of the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns and adopts a matching concave-convex connection part to achieve rapid and accurate installation of the upper ECC steel pipe inorganic adhesive composite bamboo composite column, while simplifying the connection process of the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns.

[0018] 3. By designing a dedicated welded connection device for the column connection part, and cooperating with the pre-embedded I-beams and connecting bolts in the beam, the present invention can improve the positioning accuracy and ease of installation of the column-beam connection, and enhance the overall strength, load-bearing capacity and force transmission efficiency of the column-beam connection node.

[0019] 4. By setting up a dedicated constraint shell, the present invention achieves effective positioning and constraint of the column-beam connection, ensuring the molding quality of subsequent cement-based composite material casting and avoiding local stress concentration at the connection.

[0020] 5. This invention, through standardized prefabricated connectors and assembly-type construction methods, can reduce on-site wet work, improve construction efficiency, and ultimately form a high-performance, convenient, and environmentally friendly bamboo composite structure column-beam connection system, meeting the application needs of various building projects for inorganic adhesive composite bamboo composite structures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention before connection in Embodiment 1.

[0022] Figure 2 This is a schematic diagram of the lower ECC steel pipe inorganic adhesive composite bamboo composite column in Example 1.

[0023] Figure 3 This is a schematic diagram of the upper ECC steel pipe inorganic adhesive composite bamboo composite column in Example 1.

[0024] Figure 4 This is a schematic diagram of the steel-inorganic adhesive composite bamboo beam in Example 1.

[0025] Figure 5 This is a schematic diagram of the connecting component in Embodiment 1.

[0026] Figure 6 This is a schematic diagram of the structure before the constraint shell is closed in Example 1.

[0027] Figure 7 This is a schematic diagram of the structure after the confined outer shell is closed in Example 1.

[0028] Figure 8 This is a schematic diagram of the core area after the ultra-high ductility cement-based composite material (ECC) shell of the present invention is cast in Example 1.

[0029] Figure 9 This is an overall schematic diagram of the outer shell of the ultra-high ductility cement-based composite material (ECC) of the present invention after casting in Example 1.

[0030] Figure 10 This is a schematic diagram of the present invention before connection in Embodiment 2.

[0031] Figure 11This is a schematic diagram of the lower ECC steel pipe inorganic adhesive composite bamboo composite column in Example 2.

[0032] Figure 12 This is a schematic diagram of the upper ECC steel pipe inorganic adhesive composite bamboo composite column in Example 2.

[0033] Figure 13 This is a schematic diagram of the steel-inorganic adhesive composite bamboo beam in Example 2.

[0034] Figure 14 This is a schematic diagram of the connecting component in Embodiment 2.

[0035] Figure 15 This is a schematic diagram of the structure before the constraint shell is closed in Example 2.

[0036] Figure 16 This is a schematic diagram of the structure after the confined outer shell is closed in Example 2.

[0037] Figure 17 This is a schematic diagram of the core area after the ultra-high ductility cement-based composite material (ECC) shell of the present invention is cast in Example 2.

[0038] Figure 18 This is an overall schematic diagram of the outer shell of the ultra-high ductility cement-based composite material (ECC) of the present invention after casting in Example 2.

[0039] The following are the labeling elements in the attached diagram: 1. ECC steel pipe inorganic adhesive composite bamboo composite column; 11. Inorganic adhesive composite bamboo column; 12. Steel pipe; 13. Tenon; 2. Steel section inorganic adhesive composite bamboo beam; 21. Inorganic adhesive composite bamboo beam; 22. I-beam; 23. Connecting bolt; 3. Connecting component; 31. Connecting sleeve; 32. Connecting part; 4. Constraint shell; 41. I-beam groove; 42. Vertical connecting plate. Detailed Implementation

[0040] The present invention will now be described in detail and completely with reference to the accompanying drawings and specific embodiments.

[0041] It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The purpose of this invention is to provide an ECC steel pipe inorganic adhesive composite bamboo composite column, a steel section inorganic adhesive composite bamboo beam, and their special connection method that take into account the comprehensive performance improvement of components, the overall integrity of column-beam connection nodes, convenient installation and construction, and the synergistic performance of various materials. Different implementation methods exist depending on the different connecting components. In embodiments 1 and 2, the connecting components and the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column adopt an integrated structure; in embodiments 3 and 4, the connecting components are independent components.

[0044] Example 1: like Figures 1-9 As shown, the present invention relates to a beam-column connection node for a steel-bamboo composite component, comprising: ECC steel pipe inorganic adhesive composite bamboo composite column 1, the ECC steel pipe inorganic adhesive composite bamboo composite column 1 includes inorganic adhesive composite bamboo column 11, steel pipe 12 sleeved on inorganic adhesive composite bamboo column 11, and ultra-high ductility cement-based composite material (ECC) shell cast on the outside of steel pipe 12.

[0045] In this embodiment, the ECC steel pipe inorganic adhesive composite bamboo composite column 1 is made of inorganic adhesive composite bamboo column 11 wrapped with square steel pipe 12 to enhance the compressive strength of inorganic adhesive composite bamboo column 11; after the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1 are connected and connected to the steel inorganic adhesive composite bamboo beam 2, a cement-based composite material (ECC) shell is poured on the outside and reinforcement is placed in the ECC to enhance the corrosion resistance and fire resistance of the steel pipe and further enhance the compressive strength of the composite column.

[0046] like Figure 2 As shown, in this embodiment, the height of the steel pipe 12 of the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1 is higher than that of the inorganic adhesive composite bamboo column 11 inside it. The higher part is used to pre-process into a connecting component 3. The steel pipe part that is higher than the inorganic adhesive composite bamboo column 11 can also play the role of fixing the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 and facilitating the installation of the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1.

[0047] like Figure 3 As shown, in this embodiment, the inorganic adhesive composite bamboo column 11 of the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 extends downward from the steel pipe 12, and the length of the extended inorganic adhesive composite bamboo column 11 is equal to the length of the portion of the lower ECC steel pipe inorganic adhesive composite bamboo composite column 12 that extends above its interior inorganic adhesive composite bamboo column 11.

[0048] In this embodiment, the portion of the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1 where the steel pipe 12 extends above the inorganic adhesive composite bamboo column 11 inside, and the portion of the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 where the inorganic adhesive composite bamboo column 11 extends downward from the steel pipe 12 (collectively referred to as the connecting portion), have staggered openings at the front and back of the connecting portion to adapt to the connecting screws 23 pre-embedded at the end of the steel inorganic adhesive composite bamboo beam 2, so that the steel inorganic adhesive composite bamboo beam 2 and the ECC steel pipe inorganic adhesive composite bamboo composite column 1 are better connected as a whole.

[0049] The steel-inorganic adhesive composite bamboo beam 2 includes an inorganic adhesive composite bamboo beam 21 and an I-beam 22 embedded in the inorganic adhesive composite bamboo beam 21. The I-beam 22 penetrates the inorganic adhesive composite bamboo beam 21 longitudinally.

[0050] like Figure 4As shown, in this embodiment, the steel-inorganic adhesive composite bamboo beam 2 has an I-beam 22 pre-embedded in it. The I-beam 22 is longer than the steel-inorganic adhesive composite bamboo beam 21 on the side connecting the steel-inorganic adhesive composite bamboo beam 2 and the ECC steel pipe inorganic adhesive composite bamboo composite column 1, to facilitate connection with the connecting component 3 and construction. Simultaneously, four connecting bolts 23 are pre-embedded in the steel-inorganic adhesive composite bamboo beam 2. These connecting bolts 23 do not penetrate the steel-inorganic adhesive composite bamboo beam 2; the portion of the connecting bolts 23 protruding from the steel-inorganic adhesive composite bamboo beam 2 is sufficient to penetrate the ECC steel pipe inorganic adhesive composite bamboo composite column 1 and has sufficient length for double-nut fixing. On opposite sides (such as the front and rear sides of the connecting component 3), when the front side of the connecting part is taken as the main view, the connecting bolts 23 in the same position are staggered left and right. The I-beam 22 and the horizontal connecting plates of the upper and lower parts of the connecting component 3 are respectively connected by the first bolt. The horizontal connecting plate is a steel plate. When the steel inorganic adhesive composite bamboo beam 2 is connected to the ECC steel pipe inorganic adhesive composite bamboo composite column 1, the steel inorganic adhesive composite bamboo beam 2 on the front and rear sides of the connecting component 3 is connected first, and then the steel inorganic adhesive composite bamboo beam 2 on the left and right sides is connected.

[0051] The connecting component 3 is used to connect the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1 and the side steel inorganic adhesive composite bamboo beam 2 into one unit. The connecting component 3 includes a connecting sleeve 31 and a number of connecting parts 32 fixed on the outer wall of the connecting sleeve 31.

[0052] In this embodiment, the connecting component 3 is set on the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1. The height of the steel pipe 12 of the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1 is higher than the inorganic adhesive composite bamboo column 11 inside it. The part of the steel pipe 12 that is higher than the inorganic adhesive composite bamboo column 11 serves as the connecting sleeve 31 of the connecting component 3.

[0053] The number of connecting parts 32 on the outer wall of the connecting sleeve 31 can be set as needed. They can be evenly arranged along the circumference of the connecting sleeve 31, or three connecting parts 32 can be arranged in a T-shape, or two connecting parts 32 can be arranged symmetrically. In this embodiment, the connecting sleeve 31 is a rectangular sleeve, and a set of connecting parts 32 is arranged on each of the four sides of the connecting sleeve 31.

[0054] like Figure 5As shown, in this embodiment, the four sides of the connecting component 3 are identical and can be adjusted according to actual engineering needs. Here, one side of the connecting component 3 is selected for description. Two horizontal connecting plates, one upper and one lower, are welded onto the connecting sleeve 31 as connecting parts 32. The horizontal connecting plates can be made of steel plates. The upper horizontal connecting plate is located above the upper flange of the I-beam 22 when the column is connected to the beam; the lower horizontal connecting plate is located below the lower flange of the I-beam 22 when the column is connected to the beam. Simultaneously, two trapezoidal steel plates are welded below the upper horizontal connecting plate as guide parts 33 adapted to the web of the I-beam 22. The gap between the two trapezoidal steel plates serves as a guide groove adapted to the web of the I-beam 22, facilitating the positioning and installation of the steel-inorganic composite bamboo beam 2. Holes are pre-drilled on the upper and lower horizontal connecting plates and the trapezoidal steel plates for connection to the I-beam 22 of the steel-inorganic composite bamboo beam 2. The connecting parts 32 and the I-beam 22 are connected by a first bolt.

[0055] The constraint shell 4 is wrapped around the outside of the connecting component 3. The outer wall of the constraint shell 4 is provided with a plurality of I-beam grooves 41 that are adapted to the I-beam 22. A vertical connecting plate 42 extending outward is provided in the vertical part of the I-beam groove 41. The vertical connecting plate 42 is connected to the I-beam 22 by a second bolt. The constraint shell 4 includes two shell units, which are symmetrically arranged.

[0056] like Figure 6 As shown, the constraint shell 4 includes two shell units, each being a sheet metal part. The main structure of each shell unit is U-shaped, with an H-beam groove 41 at its closed end. The vertical portion of the H-beam groove 41 has two outwardly extending vertical connecting plates 42, the gap between which is adapted to the thickness of the web of the H-beam 42. The open end of the shell unit also has an outwardly extending vertical connecting plate 42, with notches on both the upper and lower sides of the vertical connecting plate 42. Figure 7 As shown, when the two outer shell units are fastened together, an I-shaped groove structure is formed at the connection between the two outer shell units.

[0057] In this embodiment, the constraint shell 4 comprises two parts, which are fixed before the steel-inorganic composite bamboo beams 2 on the left and right sides are connected to the connecting components 3. After the steel-inorganic composite bamboo beams 2 are connected to the ECC steel pipe-inorganic composite bamboo composite column 1, the front and rear sides of the constraint shell 4 are fixed. The constraint shell 4 is connected to the web of the I-beam 22 by bolts through the outwardly extending vertical connecting plates 42. The outer side of the constraint shell 4 is in the same plane as the outer side of the ECC shell of the ECC steel pipe-inorganic composite bamboo composite column 1, and the thickness of the steel plate of the constraint shell 4 is less than the thickness of the outer protective layer of the reinforcing steel in the ECC steel pipe-inorganic composite bamboo composite column 1. The constraint shell 4 can fix the position of the steel-inorganic composite bamboo beams 2 and constrain the outer side of the ECC of the connecting part. After the ECC steel pipe-inorganic composite bamboo composite column 1 is opened, its structural strength will be weakened, and the constraint shell 4 can also enhance its strength.

[0058] After the ECC steel pipe inorganic adhesive composite bamboo composite column 1, the steel inorganic adhesive composite bamboo beam 2 and the constraint shell 4 are connected, ECC can be poured on its exterior.

[0059] Example 2 The present invention describes a construction method for the beam-column connection node of the steel-bamboo composite component in Example 1, comprising the following steps: S1. First, install the lower ECC steel pipe inorganic adhesive composite bamboo combination column 1. After fixing the bottom end of the lower ECC steel pipe inorganic adhesive composite bamboo combination column 1, insert the bottom end of the inorganic adhesive composite bamboo column 11 of the upper ECC steel pipe inorganic adhesive composite bamboo combination column 1 into the connecting sleeve 31. S2. Connect and fix the steel inorganic adhesive composite bamboo beam 1 in the left-right direction (or front-back direction) to the outer shell unit with bolts. At the same time, connect the steel inorganic adhesive composite bamboo beam 2 in the front-back direction (or left-back direction) to the corresponding connecting part 32 with bolts. Specifically, insert the pre-embedded connecting screws on the steel inorganic adhesive composite bamboo beam in the front-back direction (or left-back direction) into the connecting sleeve, the inorganic adhesive composite bamboo column and its corresponding mounting hole, and then connect and fix the steel inorganic adhesive composite bamboo beam in the front-back direction to the corresponding connecting part. S3. Connect and fix the steel inorganic adhesive composite bamboo beam 2 in the left-right direction (or front-back direction) to the corresponding connecting part 32 with bolts. Specifically, insert the pre-embedded connecting screw on the steel inorganic adhesive composite bamboo beam in the left-right direction (or front-back direction) into the connecting sleeve, the inorganic adhesive composite bamboo column and its corresponding mounting hole, then connect and fix the steel inorganic adhesive composite bamboo beam in the left-right direction (or front-back direction) to the corresponding connecting part, and connect and fix the constraint shell 4 to the steel inorganic adhesive composite bamboo beam 2 in the front-back direction (or left-back direction). S4. After the connection is completed, cement-based composite material is poured at the beam-column connection node, that is, cement-based composite material is poured at the end of the steel inorganic adhesive composite bamboo beam 2, between the constraint shell and the connecting sleeve, and at the contact position between the constraint shell and the inorganic adhesive composite bamboo column.

[0060] Example 3 like Figure 10-18 As shown, the present invention describes a beam-column connection node for a steel-bamboo composite component. The difference from Embodiment 1 is that in this embodiment, the connecting component 3 is an independent component, specifically including: ECC steel pipe inorganic adhesive composite bamboo composite column 1, the ECC steel pipe inorganic adhesive composite bamboo composite column 1 includes inorganic adhesive composite bamboo column 11, steel pipe 12 sleeved on inorganic adhesive composite bamboo column 11, and ultra-high ductility cement-based composite material (ECC) shell cast on the outside of steel pipe 12.

[0061] In this embodiment, the inorganic adhesive composite bamboo column 11 is encased in a steel pipe 12, which enhances the compressive strength and fire resistance of the inorganic adhesive composite bamboo column 11. The steel pipe 12 is a square steel pipe, and an ultra-high ductility cement-based composite (ECC) shell is cast onto the outside of the square steel pipe. The ultra-high ductility cement-based composite (ECC) shell enhances the corrosion resistance of the square steel pipe and further enhances the compressive strength of the ECC steel pipe inorganic adhesive composite bamboo composite column 1.

[0062] like Figures 11-12 As shown, in this embodiment, the connecting component 3 is disposed between the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1. The projection of the connecting sleeve 31 on the end face of the ECC steel pipe inorganic adhesive composite bamboo composite column 1 is located inside the end face of the inorganic adhesive composite bamboo column 11. The end of the inorganic adhesive composite bamboo column 1 near the connecting sleeve 31 is provided with a tenon 13 adapted to the connecting sleeve 31. The inorganic adhesive composite bamboo column 1 inside the ECC steel pipe inorganic adhesive composite bamboo composite column 1 protrudes a certain height of the tenon 13 so that the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1 can be inserted into the connecting component 3.

[0063] The steel-inorganic adhesive composite bamboo beam 2 includes an inorganic adhesive composite bamboo beam 21 and an I-beam 22 embedded in the inorganic adhesive composite bamboo beam 21. The I-beam 22 penetrates the inorganic adhesive composite bamboo beam 21 longitudinally.

[0064] like Figure 13As shown, in this embodiment, the steel-inorganic adhesive composite bamboo beam 2 has an I-beam 22 pre-embedded in it. The I-beam 22 is longer than the inorganic adhesive composite bamboo beam 21 on the side connecting the steel-inorganic adhesive composite bamboo beam 2 and the inorganic adhesive composite bamboo column 1, so as to connect with the connecting component 3 and facilitate construction. At the same time, four connecting bolts 23 are pre-embedded in the steel-inorganic adhesive composite bamboo beam 2.

[0065] The connecting component 3 is used to connect the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1 and the side steel inorganic adhesive composite bamboo beam 2 into one unit. The connecting component 3 includes a connecting sleeve 31 and a number of connecting parts 32 fixed on the outer wall of the connecting sleeve 31.

[0066] like Figure 14 As shown, in this embodiment, the main body of the connecting component 3 is a square steel pipe. All four sides of the connecting component 3 are identical and can be adjusted according to actual working conditions. Connecting parts 32 for connecting the steel-inorganic adhesive composite bamboo beam 2 are welded to the sides of the connecting component 3. The connecting parts 32 are divided into upper and lower horizontal connecting plates, which are steel plates. When the upper steel plate is connected to the steel-inorganic adhesive composite bamboo beam 2, it is located above the upper flange of the I-beam of the steel-inorganic adhesive composite bamboo beam 2; when the lower steel plate is connected to the steel-inorganic adhesive composite bamboo beam 2, it is located below the lower flange of the I-beam of the steel-inorganic adhesive composite bamboo beam 2. Two trapezoidal steel plates are welded to the lower side of the upper steel plate as guide parts 33 to facilitate the positioning and installation of the steel-inorganic adhesive composite bamboo beam 2. Holes are pre-drilled in the upper and lower steel plates and the trapezoidal steel plates to allow for bolt connection of the steel-inorganic adhesive composite bamboo beam 2.

[0067] The constraint shell 4 is wrapped around the outside of the connecting component 3. The outer wall of the constraint shell 4 is provided with a plurality of I-beam grooves 41 that are adapted to the I-beam 22. A vertical connecting plate 42 extending outward is provided in the vertical part of the I-beam groove 41. The vertical connecting plate 42 is connected to the I-beam 22 by a second bolt. The constraint shell 4 includes two shell units, which are symmetrically arranged.

[0068] like Figures 15-16 As shown, the constraint shell 4 is divided into two parts, which are fixed before the steel-inorganic composite bamboo beams 2 on the left and right sides are connected to the connecting parts 3. After the steel-inorganic composite bamboo beams 2 are connected to the ECC steel pipe-inorganic composite bamboo composite column 1, the front and rear sides of the constraint shell 4 are fixed. The two sides connecting the constraint shell 4 are called the primary connection surfaces, and the side surfaces are called the main surfaces. The other two sides are called the side surfaces. The primary connection surfaces are pre-drilled to ensure that the connecting screws 23 and I-beams 22 of the steel-inorganic composite bamboo beams 2 can pass through. This hole is called the primary connection hole.

[0069] The initial connection hole has openings on the upper and lower sides to allow the connecting screw 23 to pass through, connecting and fixing the constraint shell 4 to the ECC steel pipe inorganic adhesive composite bamboo composite column 1. The steel plate extending from the side of the constraint shell 4 can be used to fix and connect the steel inorganic adhesive composite bamboo beams 2 on the front and rear sides of the ECC steel pipe inorganic adhesive composite bamboo composite column 1.

[0070] After the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1, connecting component 3, and steel inorganic adhesive composite bamboo beam 2 are installed, cement-based composite material (ECC) is poured. The pouring height of the cement-based composite material inside the constraint shell 4 is level with the top of the connecting component 3. At the same time, the connecting bolts and exposed parts of the I-beams of the steel inorganic adhesive composite bamboo beam 2 are poured. After pouring, the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 is installed, connected and fixed to the constraint shell 4. Then, cement-based composite material (ECC) is poured on the outside of the constraint shell 4.

[0071] In this embodiment, the function of the constraint shell 4 is to constrain the cement-based composite material in the core area to enhance its pressure-bearing capacity; and to connect and fix the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns 1. After the ECC steel pipe inorganic adhesive composite bamboo composite column 1 is opened, its strength will be weakened, and the constraint shell 4 can also play a role in enhancing its strength.

[0072] Example 4: The present invention describes a construction method for the beam-column connection node of the steel-bamboo composite component in Example 3, comprising the following steps: S1. After the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1 is installed, insert the tenon 13 of the top 1 of the lower ECC steel pipe inorganic adhesive composite bamboo composite column into the connecting sleeve 31 of the connecting component 3. S2. Connect and fix the steel inorganic adhesive composite bamboo beam 2 in the left-right direction (or front-back direction) to the outer shell unit with bolts, and at the same time connect and fix the steel inorganic adhesive composite bamboo beam 2 in the front-back direction (or left-back direction) to the corresponding connecting part 32 with bolts. S3. Connect and fix the steel inorganic adhesive composite bamboo beam 2 in the left-right direction (or front-back direction) to the corresponding connecting part 32 with bolts, and connect and fix the constraint shell 4 to the steel inorganic adhesive composite bamboo beam 2 in the front-back direction (or left-back direction), and fix the constraint shell 4 to the lower ECC steel pipe inorganic adhesive composite bamboo combination column 1 with bolts. S4. After the connection is completed, cement-based composite materials are poured at the following positions: outside the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column 1, inside the constraint shell 4, outside the constraint shell 4, and at the end of the steel inorganic adhesive composite bamboo beam. The pouring height of the cement-based composite material inside the constraint shell 4 is the same as the height of the connecting component 3. S5. Insert the tenon 13 at the bottom of the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 into the connecting sleeve 31, then fix the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1 to the constraint shell 4, and finally pour cement-based composite material on the steel pipe of the upper ECC steel pipe inorganic adhesive composite bamboo composite column 1.

Claims

1. A beam-column connection node for a steel-bamboo composite component, characterized in that, include: ECC steel pipe inorganic adhesive composite bamboo composite column, the ECC steel pipe inorganic adhesive composite bamboo composite column includes inorganic adhesive composite bamboo column, steel pipe sleeved on inorganic adhesive composite bamboo column and ultra-high ductility cement-based composite material shell cast on the outside of steel pipe; The steel-inorganic adhesive composite bamboo beam includes an inorganic adhesive composite bamboo beam and an I-beam embedded in the inorganic adhesive composite bamboo beam. The I-beam penetrates the inorganic adhesive composite bamboo beam longitudinally. A connecting component is used to connect the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns and the side steel inorganic adhesive composite bamboo beam into one unit. The connecting component includes a connecting sleeve and several connecting parts fixed to the outer wall of the connecting sleeve. The bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve; the top end of the inorganic adhesive composite bamboo column of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve, or the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is fixedly connected to the connecting sleeve; the connecting parts are connected to the I-beams by a first bolt. The constraint shell is wrapped around the outside of the connecting component. The outer wall of the constraint shell is provided with a plurality of I-beam grooves adapted to the I-beam, and a vertical connecting plate extending outward is provided in the vertical part of the I-beam groove. The vertical connecting plate is connected to the I-beam by a second bolt. The constraint shell includes two shell units, which are symmetrically arranged.

2. The beam-column connection node of a steel-bamboo composite component as described in claim 1, characterized in that, The ultra-high ductility cement-based composite material shell is reinforced with longitudinal steel bars and matching confinement stirrups to form a complete reinforcement and confinement system.

3. The beam-column connection node of a steel-bamboo composite component as described in claim 1, characterized in that, The ends of the inorganic adhesive composite bamboo beams are pre-embedded with connecting screws, and the ECC steel pipe inorganic adhesive composite bamboo composite columns, connecting parts and constraint shells are all provided with mounting holes adapted to the connecting screws.

4. The beam-column connection node of a steel-bamboo composite component as described in claim 1, characterized in that, The connecting part includes two horizontal connecting plates, and the I-beam is located between the upper and lower horizontal connecting plates.

5. The beam-column connection node of a steel-bamboo composite component as described in claim 4, characterized in that, A guide portion adapted to the web of the I-beam is provided between the upper and lower horizontal connecting plates, and a guide groove adapted to the web of the I-beam is provided on the guide portion.

6. The beam-column connection node of a steel-bamboo composite component as described in claim 1, characterized in that, The connecting component is installed on the lower ECC steel pipe inorganic adhesive composite bamboo composite column. The height of the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column is higher than that of the inorganic adhesive composite bamboo column, and the part of the steel pipe that extends above the inorganic adhesive composite bamboo column serves as the connecting sleeve of the connecting component. The bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column extends downward from the steel pipe, and the bottom end of the inorganic adhesive composite bamboo column of the upper ECC steel pipe inorganic adhesive composite bamboo composite column is inserted into the connecting sleeve.

7. The beam-column connection node of a steel-bamboo composite component as described in claim 6, characterized in that, The outer surface of the constraint shell is coplanar with the outer surface of the ultra-high ductility cement-based composite material shell, and the thickness of the steel plate of the constraint shell is less than the thickness of the ultra-high ductility cement-based composite material shell.

8. The beam-column connection node of a steel-bamboo composite component as described in claim 1, characterized in that, The connecting component is disposed between the upper and lower ECC steel pipe inorganic adhesive composite bamboo composite columns. The projection of the connecting sleeve on the end face of the ECC steel pipe inorganic adhesive composite bamboo composite column is located inside the end face of the inorganic adhesive composite bamboo column. The inorganic adhesive composite bamboo column is provided with a tenon adapted to the connecting sleeve at one end, and a connecting hole for fixing the constraint shell is provided at the other end of the inorganic adhesive composite bamboo column near the connecting sleeve.

9. The construction method for beam-column connection nodes of a steel-bamboo composite component as described in claim 7, characterized in that, Including the following steps: S1. After the lower ECC steel pipe inorganic adhesive composite bamboo combination column is installed, insert the bottom end of the upper ECC steel pipe inorganic adhesive composite bamboo combination column into the connecting sleeve. S2. Connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the outer shell unit; S3. Insert the pre-embedded connecting screws on the steel inorganic adhesive composite bamboo beam in the front and rear directions into the connecting sleeve, the inorganic adhesive composite bamboo column and its corresponding mounting holes, and then connect and fix the steel inorganic adhesive composite bamboo beam in the front and rear directions to the corresponding connecting parts. S4. Insert the pre-embedded connecting screws on the steel inorganic adhesive composite bamboo beams in the left and right directions into the connecting sleeves, inorganic adhesive composite bamboo columns and their corresponding mounting holes. Then connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the corresponding connecting parts, and connect and fix the constraint shell to the steel inorganic adhesive composite bamboo beams in the front and back directions. S5. After the connection is completed, cement-based composite material is poured at the ends of the steel inorganic adhesive composite bamboo beam, between the constraint shell and the connecting sleeve.

10. The construction method for beam-column connection nodes of a steel-bamboo composite component as described in claim 8, characterized in that, Including the following steps: S1. After the lower ECC steel pipe inorganic adhesive composite bamboo composite column is installed, insert the tenon at the top of the lower ECC steel pipe inorganic adhesive composite bamboo composite column into the connecting sleeve of the connecting component. S2. Connect and fix the steel-inorganic adhesive composite bamboo beams in the left and right directions to the outer shell unit, and at the same time connect and fix the steel-inorganic adhesive composite bamboo beams in the front and back directions to the corresponding connecting parts. S3. Connect and fix the steel inorganic adhesive composite bamboo beams in the left and right directions to the corresponding connecting parts, and connect and fix the constraint shell to the steel inorganic adhesive composite bamboo beams in the front and back directions. At the same time, fix the constraint shell to the lower ECC steel pipe inorganic adhesive composite bamboo combination column. S4. After the connection is completed, cement-based composite material is poured on the outside of the steel pipe of the lower ECC steel pipe inorganic adhesive composite bamboo composite column, the inside of the constraint shell, the outside of the constraint shell, and the end of the steel inorganic adhesive composite bamboo beam. The pouring height of the cement-based composite material inside the constraint shell is the same as the height of the connecting parts. S5. Insert the tenon at the bottom of the upper ECC steel pipe inorganic adhesive composite bamboo composite column into the connecting sleeve, then fix the upper ECC steel pipe inorganic adhesive composite bamboo composite column to the constraint shell, and finally cast ECC on the outside of the steel pipe of the upper steel bamboo composite bamboo column.

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