Fabricated steel-wood composite beam-column joint structure and construction method thereof

Abstract

The application belongs to the technical field of beam-column joint construction, and particularly relates to an assembled steel-wood combined beam-column joint structure and a construction method thereof. The steel-wood combined beam-column joint structure comprises a steel outer wrapping beam, a conical steel end is arranged on one side of the inner end face of the steel outer wrapping beam, a prefabricated cavity is arranged on the side away from the conical steel end of the steel outer wrapping beam, a stress steel beam is sleeved in the built-in prefabricated cavity of the steel outer wrapping beam, steel ribs are arranged at four corners of the stress steel beam, dovetail grooves are arranged between the two steel ribs, and the stress is uniformly distributed from steel to wood through the steel outer wrapping beam, the stress steel beam and the steel truss in stages and the dispersion of the lock tongue assembly. The lateral load is converted into the tensile force that can be borne by the steel through the cooperation of the wood beam, the lock tongue assembly and the stress anchor block, so that the problem of local stress concentration is avoided from the root. The force flow is always smooth and continuous when the joint bears various loads in the hierarchical transmission mode, and the overall deformation resistance is significantly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of beam-column node structures, and in particular relates to an assembled steel-wood composite beam-column node structure and a construction method thereof. Background Art

[0002] With the development of the country, the labor force is becoming increasingly tight, and the requirements for green buildings are getting higher and higher. The advantages of prefabricated buildings are highlighted. It transfers a large number of on-site operations to factories, can effectively control the quality of components, reduce the input of turnover materials, and the construction process is green, environmentally friendly and energy-saving. It is also highly intelligent and mechanized, which can save manpower and construction costs. It is an important direction for the transformation and upgrading of the construction industry. In this context, the beam-column node structure, as a key component of prefabricated buildings, needs to be continuously innovated and optimized to adapt to the development needs of prefabricated buildings.

[0003] A Chinese invention patent publication numbered CN108978869B discloses an assembled steel-wood composite beam-column joint structure and its construction method. The joint structure comprises a perpendicular steel-wood composite beam and steel-wood composite column, and connectors for securing the two. The steel-wood composite beam comprises an inverted T-beam, left and right wooden boards connected to either side of the inverted T-beam web, and a lower wooden board connected to the underside of the inverted T-beam flange. The steel-wood composite column comprises an I-beam, a web board connected between the two flanges of the I-beam, and front and rear flange boards on the outside of the two flanges of the I-beam. The connectors comprise a base plate and an insert plate connected to the front of the base plate. During construction, the insert plates are inserted into slots in the left and right wooden boards to securely connect the steel-wood composite beam, while the base plate is fixed to the outer surface of the flange of the steel-wood composite column, thereby achieving a joint connection between the steel-wood composite beam and column. The invention fully utilizes the material stress characteristics of the steel-wood structure, reducing the deadweight of the structure and saving steel. The node design is highly maneuverable and saves construction time.

[0004] However, the above technology often has the following defects: this technology fixes the steel-wood composite beam by inserting the plug-in plates into the slots of the left and right wooden boards. This connection method is highly dependent on the bearing capacity of the wooden board slots. Wood is prone to shrinkage and deformation under dry-wet cycles or long-term stress, which may cause gaps between the slots and the plug-in plates, thereby reducing the overall stiffness of the node. At the same time, the bottom plate is only fixed to the outer surface of the flange plate of the steel-wood composite column. When the beam body transmits a large vertical load, the node may be locally deformed due to concentrated force, affecting the long-term stability of the structure.

[0005] To this end, the present invention provides an assembled steel-wood composite beam-column node structure and a construction method thereof. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the present invention describes an assembled steel-wood composite beam-column node structure and its construction method, comprising a steel outer cladding beam, wherein the inner end surface of one side of the steel outer cladding beam is provided with a tapered steel end, and the side of the steel outer cladding beam away from the tapered steel end is provided with a prefabricated cavity, and a stress steel beam is sleeved in the built-in prefabricated cavity of the steel outer cladding beam, and the four corners of the stress steel beam are provided with steel ribs, and a dovetail groove is provided between the steel ribs on both sides, and the inner arc surface of the dovetail groove runs through the connection A steel truss is connected, and the steel truss is provided with an outer abutment end near the inner wall of the dovetail groove, and one side of the outer abutment end abuts the dovetail groove between the steel ribs. The steel truss is provided with an L-shaped folded edge on the side away from the outer abutment end, and a square frame is provided at the bottom of one side surface of the L-shaped folded edge, and an insertion hole is opened in the middle of one side surface of the square frame. The steel truss is fixedly installed with a wooden beam through the square frame on one side, and the outer arc surface of the wooden beam is sleeved with a reinforcing sleeve, and the reinforcing sleeve is annularly sleeved to the outer wall of the wooden beam.

[0008] A stress anchor block is connected to the side of the square frame away from the wooden beam, and an arc bottom is provided in the middle of the surface of the side of the stress anchor block close to the square frame. The upper and lower surfaces of the wooden beam are both abutted with lock tongue assemblies.

[0009] The locking tongue assembly includes a fixing frame attached to the top and bottom of the wooden beam, the outer side wall of the fixing frame is connected to the inner wall of the reinforcing sleeve, and an extension edge is provided on the side of the fixing frame away from the wooden beam.

[0010] A connecting surface is provided at the extended edge of one side of the fixing frame, and the connecting surface is placed between the square frame and the stress anchor block. The outer arc surface on one side of the bottom end of the arc abuts against one side of the connecting surface. The upper and lower ends of the stress anchor block are provided with convex ends, and the convex ends on both sides are adapted to the connecting surface.

[0011] An axial positioning body is provided between the convex end and the bottom end of the arc, one end face of the axial positioning body is fitted on the stress anchor block, the inner arc surface of the axial positioning body is sleeved with a conical radial positioning body, the outer arc surface of the conical radial positioning body is provided with an outer convex end near the axial positioning body, and one end of the conical radial positioning body passes through the through hole on one side of the square frame.

[0012] The outer arc surface of the outer convex end is clamped into the inner arc surface of the insertion hole, one side of the axial positioning body is abutted against one side of the outer convex end, and an intermediate groove is provided between the tail end of the axial positioning body and the conical radial positioning body, and a lock tongue kit is movably clamped in the intermediate groove.

[0013] A compression sleeve section is provided at one edge of the outer arc surface of the lock tongue sleeve, one end of the compression sleeve section is connected to the groove between the axial positioning body and the conical radial positioning body, and an axial sleeve end is provided on the end face of the lock tongue sleeve away from the compression sleeve section.

[0014] An expansion bolt is sleeved on one side surface of the axial sleeve end, one end of the expansion bolt passes through the interior of the conical radial positioning body, an anti-rotation screw sleeve is sleeved on the conical surface of the conical radial positioning body, the outer arc surface of the anti-rotation screw sleeve is spirally inserted into the wooden beam, and the inner arc surface of the anti-rotation screw sleeve is sleeved on the conical radial positioning body.

[0015] An expansion spline is sleeved on one edge of the outer arc surface of the anti-rotation screw sleeve, and a key sleeve flap is provided on one side surface of the expansion spline. The outer arc surface of the key sleeve flap is placed inside the wooden beam, and one end of the expansion bolt is placed in the inner arc surface of the key sleeve flap.

[0016] A construction method for an assembled steel-wood composite beam-column node structure, the method using an assembled steel-wood composite beam-column node structure, comprising the following steps:

[0017] S1. Steel component assembly stage: slowly push the stress steel beam into the prefabricated cavity of the steel outer beam, and use a spirit level to calibrate during the pushing process to ensure that the axes of the two coincide. After the sleeve connection is completed, inject non-shrinkage grouting material into the gap of the prefabricated cavity. The grouting needs to be carried out continuously from the bottom of the cavity to the top. After the grouting material has initially set, remove the temporary fixing device and cure it to the design strength. Align the outer end of the steel truss with the dovetail groove of the stress steel beam and embed it by mechanical pressing to ensure that the outer end fits tightly with the dovetail groove. After the pressing is completed, check the verticality of the steel truss.

[0018] S2. Assembly stage of wooden components and connection components: Install the connecting frame of the lock tongue assembly at the preset position of the wooden beam and preliminarily fix it with self-tapping screws to ensure that the connecting frame fits the inner wall of the reinforcing sleeve, pass the conical radial positioning body through the through hole on the square frame, pre-tighten the expansion bolts, complete the preliminary connection between the lock tongue assembly and the steel truss, hoist the wooden beam to the side of the steel truss, adjust the position so that the connection surface of the lock tongue assembly fits the square frame and the stress anchor block, at this time, the reserved gap between the square frame and the wooden beam needs to be kept uniform, fix the wooden beam with a temporary clamp, and then tighten the expansion bolts of the lock tongue assembly. Simultaneously monitor the fit of the connection surface during the tightening process to ensure that the key sleeve petals of the expansion spline are completely embedded in the wooden beam.

[0019] S3. Debugging stage: Adjust the position of the stress anchor block so that the bottom end of the arc contacts the connection surface smoothly. Fix the stress anchor block to the steel truss with bolts. Check the stability of the stress anchor block after fixing. After the lifting is completed, use a level to detect the deflection of the node, apply temporary loads to observe the connection parts of the node, and check whether there is any residual deformation of the component after removing the temporary load.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The force is evenly distributed from steel to wood through the step-by-step transmission of steel outer beams, stress steel beams and steel trusses, and relying on the dispersing effect of the lock tongue assembly. The lateral load is converted into a tensile force that the steel can withstand through the coordinated cooperation of the wooden beams, lock tongue assemblies and stress anchor blocks, avoiding the problem of local stress concentration from the root. This hierarchical transmission mode allows the node to maintain a smooth, continuous and uninterrupted force flow when bearing various loads, and the overall deformation resistance is significantly improved. At the same time, the stiffness of the wood is enhanced under the constraint of the reinforcing sleeve, forming a complementary performance with the steel. The steel resists tensile and impact loads by its own characteristics, and the wood effectively shares the compressive load. The two are combined with the rigid connection of the lock tongue assembly, which greatly improves the ultimate bearing capacity of the node compared to the traditional steel-wood node, and is not prone to stiffness degradation under repeated loads.

[0022] 2. The reinforced sleeve can effectively inhibit the shrinkage and expansion of wood. The mechanical self-locking structure of the lock tongue assembly can prevent the connection from loosening, and the curved contact surface of the stress anchor block can reduce friction loss. The synergistic effect of the three makes the node less likely to experience performance degradation during long-term use, even in the face of environmental changes or repeated loads. In the lateral load transfer path, the toughness of the steel and the elasticity of the wood form a good buffer. Combined with the anti-slip design of the lock tongue assembly, the node can absorb energy through moderate deformation under the action of sudden earthquake loads, thereby greatly reducing the risk of brittle failure of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 It is an overall stereogram of the present invention;

[0025] Figure 2 is a top view of the stress steel beam and the wooden beam of the present invention;

[0026] Figure 3 This is a disassembled diagram of the steel outer cladding beam of the present invention;

[0027] Figure 4 This is a schematic diagram of the overall structure of the square frame connection in the present invention;

[0028] Figure 5 This is a schematic structural diagram of a side section of the lock tongue assembly inside a wooden beam in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the lock tongue assembly of the present invention;

[0030] Figure 7 This is a schematic structural diagram of the connection between the expansion sleeve spline and the expansion bolt in the present invention;

[0031] Figure 8It is a schematic diagram of the partial structure of the steel outer cladding beam in the present invention.

[0032] In the figure: 1, steel outer cladding beam; 101, tapered steel end; 102, prefabricated cavity;

[0033] 2. Stressed steel beam; 201. Steel rib; 202. Dovetail groove;

[0034] 3. Steel truss; 301, outer end; 302, L-shaped folding edge;

[0035] 4. Square frame; 401. Through hole; 5. Wooden beam; 6. Stress anchor block; 601. Arc bottom;

[0036] 7. Lock tongue assembly; 71. Connecting frame; 711. Connecting surface; 72. Axial positioning body; 73. Conical radial positioning body; 731. Outer protrusion; 74. Lock tongue assembly; 741. Compression sleeve segment; 742. Axial sleeve end; 75. Expansion bolt; 76. Anti-rotation screw sleeve; 77. Expansion sleeve spline; 771. Key sleeve petal;

[0037] 8. Strengthen the sleeve. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0039] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, the embodiment of the present invention includes a steel outer cladding beam 1, an inner end surface of one side of the steel outer cladding beam 1 is provided with a tapered steel end 101, a prefabricated cavity 102 is provided on the side of the steel outer cladding beam 1 away from the tapered steel end 101, a stress steel beam 2 is sleeved in the built-in prefabricated cavity 102 of the steel outer cladding beam 1, steel ribs 201 are provided at the four corners of the stress steel beam 2, a dovetail groove 202 is provided between the steel ribs 201 on both sides, a steel truss 3 is connected to the inner arc surface of the dovetail groove 202, and the steel truss 3 is close to the inner surface of the dovetail groove 202. The side wall is provided with an outer end 301, one side of the outer end 301 abuts against the dovetail groove 202 between the steel ribs 201, and the side of the steel truss 3 away from the outer end 301 is provided with an L-shaped folded edge 302, and the bottom of one side surface of the L-shaped folded edge 302 is provided with a square frame 4, and an insertion hole 401 is opened in the middle of one side surface of the square frame 4. The steel truss 3 is fixedly installed with a wooden beam 5 through the square frame 4 on one side, and the outer arc surface of the wooden beam 5 is sleeved with a reinforcing sleeve 8, and the reinforcing sleeve 8 is annularly sleeved to the outer wall of the wooden beam 5.

[0040] When the node is subjected to vertical loads such as the deadweight of the beam and the load of the upper structure, the load first acts on the steel outer beam 1. Since the steel outer beam adopts a rectangular cavity structure and one side is connected to the column through a tapered steel end 101, the load will be transmitted to the stress steel beam 2 through the side wall of the outer beam. The stress steel beam 2 is connected to the outer beam through the prefabricated cavity 102, and a rigid connection is formed in the gap between the two to ensure that the load is evenly transmitted from the outer beam to the stress steel beam 2. The four-corner steel ribs 201 of the stress steel beam 2 enhance the local compressive resistance. The load is transmitted to the outer end 301 of the steel truss 3 through the steel ribs 201. Because the outer end 301 is tightly fitted with the dovetail groove 202, the load is then transmitted to the square frame 4 through the L-shaped folded edge 302 of the steel truss 3, and finally the lock tongue assembly 7 disperses the load to the wooden beam 5.

[0041] The lateral load is borne by the wooden beam 5. The reinforced sleeve 8 on the outside of the wooden beam 5 improves the shear and deformation resistance of the wood. The load is first transmitted from the wooden beam 5 to the fixing frame 71 of the lock tongue assembly 7, and then transmitted to the stress anchor block 6 through the connecting surface 711. The stress anchor block 6 converts the lateral force into a tensile force on the steel truss 3 through the cooperation of the arc bottom end 601 and the axial positioning body 72. Finally, it is transmitted from the steel truss 3 to the stress steel beam 2, and the toughness of the steel is used to resist lateral deformation. In the whole force-bearing process, the steel outer beam 1, the stress steel beam 2 and the steel truss 3 serve as the main The load carrier bears most of the peak stress of vertical load and lateral load. The high strength of steel can resist the tensile and compressive deformation caused by the load, and the wooden beam 5 serves as an auxiliary load-bearing and rigidity-enhancing body. It improves its own rigidity by the restraining effect of the reinforcing sleeve 8, and reduces the deflection of the overall structure. Under the action of vertical load, when the stressed steel beam 2 is slightly bent, the wooden beam 5 is synchronously stressed through the rigid connection of the lock tongue assembly 7, and uses the compressive properties of wood to share part of the load, avoiding excessive stress on the steel alone and causing plastic deformation, thereby realizing the complementary performance of steel and wood.

[0042] like Figure 4 and Figure 5 As shown, a stress anchor block 6 is connected to the side of the square frame 4 away from the wooden beam 5, and a circular arc bottom end 601 is provided in the middle of the surface of the side of the stress anchor block 6 close to the square frame 4, and a lock tongue assembly 7 is abutted on the upper and lower surfaces of the wooden beam 5.

[0043] The stress anchor block 6 is subjected to force balance in the lateral load transmission, with the arc bottom end 601 point as the fulcrum, converting the force borne on one side into a reverse force on the other side, thereby realizing efficient force transmission and direction conversion. In the process of lateral load transmission, the lateral force borne by the wooden beam 5 is first transmitted to the arc bottom end 601 of the stress anchor block 6 through the fixing frame 71 and the connecting surface 711 of the lock tongue assembly 7. At this time, the contact point between the arc bottom end 601 and the connecting surface 711 can be regarded as a fulcrum. When the lateral force pushes the connecting surface 7 When 11 moves toward the steel truss 3, one end of the stress anchor block 6 is lifted upward, while the part of the other end in contact with the axial positioning body 72 is pressed downward toward the axial positioning body 72. Under the pressure of the stress anchor block 6, the axial positioning body 72 drives the steel truss 3 to generate a pulling force in the direction of the stress steel beam 2. Through the balance of the force arm of the fulcrum, the stress anchor block 6 concentrates the dispersed lateral force into a tensile force that the steel truss 3 can withstand, and finally transmits it to the stress steel beam 2, using the toughness of the steel to complete the resistance of the lateral load.

[0044] like Figure 5 、 Figure 6 and Figure 7 As shown, the lock tongue assembly 7 includes a fixing frame 71 that is attached to the top and bottom of the wooden beam 5. The outer wall of the fixing frame 71 is connected to the inner wall of the reinforcing sleeve 8. The fixing frame 71 is provided with an extended edge on the side away from the wooden beam 5. A connecting surface 711 is provided at the extended edge on one side of the fixing frame 71. The connecting surface 711 is placed between the square frame 4 and the stress anchor block 6. The outer arc surface of one side of the arc bottom end 601 abuts against one side of the connecting surface 711. The upper and lower ends of the stress anchor block 6 are provided with convex ends, and the convex ends on both sides are adapted to the connecting surface 711.

[0045] When the locking cam 73 is in the unlocking state, the locking cam 73 is in the unlocking state, and the locking cam 73 is in the unlocking state, so that the locking cam 73 is locked and the locking cam 73 is locked. When the bolt 75 is in the unlock position, the screw 74 is locked and the locking nut 77 is locked, so that the bolt 77 can be locked in the unlock position when the bolt 77 is locked.

[0046] The load is transferred to the fixing frame 71 of the lock tongue assembly 7, the fixing frame 71 is fitted on the top and bottom of the wooden beam 5, and its inner side is completely fitted with the surface of the wooden beam 5. After the load is gathered by the fixing frame 71, it is transferred to the connecting surface 711 extended from it. The connecting surface 711 serves as a transfer node for force and will be diverted and transferred according to the load type. For vertical loads, the connecting surface 711 forms a surface contact with the square frame 4, and the load is directly transferred to the square frame 4 through this contact surface, and then transmitted to the steel truss 3 by the square frame 4, so that the lateral force is guided along the arc surface to the axial positioning body 72, thereby completing the transition of force to the steel component and avoiding sudden stress mutation. The lock tongue assembly 7 is rigidly connected through a multi-layer self-locking structure. First, the conical radial positioning body 73 is inserted along the insertion hole 401 of the square frame 4, and its outer protruding end 731 is engaged with the card groove of the hole wall of the insertion hole 401 to form a preliminary fixation, which limits the movement of the conical radial positioning body 73 in the horizontal and vertical directions.

[0047] Subsequently, the expansion bolt 75 passes through the axial sleeve end 742 and is gradually tightened. During the tightening process, the expansion bolt 75 will push the conical radial positioning body 73 to move toward the expansion sleeve spline 77, and the conical surface of the conical radial positioning body 73 will contact the inner wall of the expansion sleeve spline 77. As the conical radial positioning body 73 advances, its conical surface will generate radial thrust on the expansion sleeve spline 77, forcing the key sleeve petal 771 of the expansion sleeve spline 77 to expand outward. After the key sleeve petal 771 expands outward, it is embedded in the wooden beam 5 and tightly engages with the wooden beam 5. The reaction force of the wooden beam 5 on the key sleeve petal 771 forms a mechanical self-locking, and at this time the conical radial positioning body 73 is firmly fixed.

[0048] At the same time, the axial positioning body 72 and the lock tongue kit 74 cooperate with each other, the axial positioning body 72 abuts against the outer protruding end 731 of the conical radial positioning body 73, and the lock tongue kit 74 is installed in the groove between the axial positioning body 72 and the conical radial positioning body 73. When the structure produces slight deformation due to temperature changes or force, the lock tongue kit 74 can absorb these deformations through its own elastic deformation, and the axial positioning body 72 can limit the amplitude of deformation to avoid gaps in the connection parts and cause looseness, thereby ensuring that slippage and disconnection are avoided during load transfer.

[0049] The reinforcing sleeve 8 is made of fiber-reinforced composite material, and its fixing frame 71 is tightly sleeved on the outside of the wooden beam 5 and bonded to the outer arc surface of the wood through epoxy resin adhesive to form an all-round wrapping constraint. When the wooden beam 5 is subjected to vertical load, the wood is prone to radial expansion due to local pressure, and the reinforcing sleeve 8 relies on its own tensile strength to form a reverse annular constraint on the wood, limiting the lateral deformation of the wood, forcing the wood to convert more stress into axial compressive resistance, thereby improving the overall bearing capacity of the wooden beam 5. For lateral loads, the integrity of the sleeve can effectively prevent the wood from shearing deformation, and the shearing tendency of the wood under the action of lateral force will be offset by the rigid constraint of the sleeve, avoiding cracking or dislocation of the wood.

[0050] In addition, the corrosion resistance and durability of the fiber-reinforced composite material provide long-term protection for the wooden beam 5. Wood is prone to moisture absorption and expansion in a humid environment, and the reinforced sleeve 8 can block direct contact between the wood and external water vapor. At the same time, the restraining effect of the sleeve on the wood can offset the internal stress caused by the shrinkage and expansion of the wood, reduce the loosening of the connection caused by deformation of the wood, and indirectly ensure the force stability of the lock tongue assembly 7.

[0051] A construction method for an assembled steel-wood composite beam-column node structure comprises the following steps:

[0052] S1. Steel component assembly stage: slowly push the stress steel beam 2 into the prefabricated cavity 102 of the steel outer beam 1. Use a spirit level to calibrate during the pushing process to ensure that the axes of the two coincide. After the sleeve connection is completed, inject non-shrinkage grouting material into the gap of the prefabricated cavity 102. The grouting needs to be carried out continuously from the bottom of the cavity to the top. After the grouting material has initially set, remove the temporary fixing device and cure it to the design strength. Align the outer end 301 of the steel truss 3 with the dovetail groove 202 of the stress steel beam 2 and embed it by mechanical pressing to ensure that the outer end 301 and the dovetail groove 202 are tightly fitted. After the pressing is completed, check the verticality of the steel truss 3.

[0053] S2, assembly stage of wooden components and connection components: install the connecting frame 71 of the lock tongue assembly 7 at the preset position of the wooden beam 5 and preliminarily fix it with self-tapping screws to ensure that the connecting frame 71 fits the inner wall of the reinforcing sleeve 8, pass the conical radial positioning body 73 through the through hole 401 on the square frame 4, pre-tighten the expansion bolt 75, complete the preliminary connection between the lock tongue assembly 7 and the steel truss 3, hoist the wooden beam 5 to the side of the steel truss 3, adjust the position so that the connection surface 711 of the lock tongue assembly 7 fits the square frame 4 and the stress anchor block 6, at this time, the reserved gap between the square frame 4 and the wooden beam 5 needs to be kept uniform, fix the wooden beam 5 with a temporary clamp, and then tighten the expansion bolt 75 of the lock tongue assembly 7. During the tightening process, synchronously monitor the fit of the connection surface 711 to ensure that the key sleeve petal 771 of the expansion sleeve spline 77 is completely embedded in the wooden beam 5.

[0054] S3, debugging stage: adjust the position of the stress anchor block 6 so that the bottom end 601 of the arc is in smooth contact with the connection surface 711, fix the stress anchor block 6 to the steel truss 3 with bolts, and check the stability of the stress anchor block 6 after fixing. After the lifting is completed, use a level to detect the deflection of the node, apply temporary loads to observe the various connection parts of the node, and check whether there is any residual deformation of the component after removing the temporary loads.

[0055] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0057] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled steel-wood composite beam-column node structure, characterized by: The invention comprises a steel outer cladding beam (1), wherein the inner end surface of one side of the steel outer cladding beam (1) is provided with a tapered steel end (101), and the side of the steel outer cladding beam (1) away from the tapered steel end (101) is provided with a prefabricated cavity (102), and a stress steel beam (2) is sleeved in the built-in prefabricated cavity (102) of the steel outer cladding beam (1), and the stress steel beam (2) is provided with steel ribs (201) at four corners, and a dovetail groove (202) is provided between the steel ribs (201) on both sides, and the inner arc surface of the dovetail groove (202) is connected with a steel truss (3), and the inner side wall of the steel truss (3) close to the dovetail groove (202) is provided with an outer support. An end (301) is provided, one side of the outer end (301) is abutted against the dovetail groove (202) between the steel ribs (201), an L-shaped folding edge (302) is provided on the side of the steel truss (3) away from the outer end (301), a square frame (4) is provided on the bottom of one side surface of the L-shaped folding edge (302), a through hole (401) is provided in the middle of one side surface of the square frame (4), the steel truss (3) is fixedly mounted with a wooden beam (5) through the square frame (4) on one side, the outer arc surface of the wooden beam (5) is sleeved with a reinforcing sleeve (8), and the reinforcing sleeve (8) is annularly sleeved on the outer side wall of the wooden beam (5); The side of the square frame (4) away from the wooden beam (5) is connected to a stress anchor block (6), and the middle part of the surface of the side of the stress anchor block (6) close to the square frame (4) is provided with an arc bottom end (601), and the upper and lower surfaces of the wooden beam (5) are both abutted with a lock tongue assembly (7), and the lock tongue assembly (7) includes a fixed connection frame (71) attached to the top and bottom of the wooden beam (5), and the outer side wall of the fixed connection frame (71) is connected to the inner wall of the reinforcing sleeve (8), and the side of the fixed connection frame (71) away from the wooden beam (5) is provided with an extension edge, and the extended edge of one side of the fixed connection frame (71) is provided with a connecting surface (711), and the connecting surface (711) is placed between the square frame (4) and the stress anchor block (6), and the outer arc surface of one side of the arc bottom end (601) abuts against one side of the connecting surface (711), and the upper and lower ends of the stress anchor block (6) are provided with convex ends, and the convex ends on both sides are adapted to the connecting surface (711); An axial positioning body (72) is provided between the convex end and the arc bottom end (601), one end face of the axial positioning body (72) is fitted on the stress anchor block (6), the inner arc surface of the axial positioning body (72) is sleeved with a conical radial positioning body (73), the outer arc surface of the conical radial positioning body (73) is provided with an outer convex end (731) near the axial positioning body (72), and one end of the conical radial positioning body (73) is extended through the insertion hole (401) on one side of the square frame (4).

2. The assembled steel-wood composite beam-column node structure according to claim 1, characterized in that: The outer arc surface of the outer convex end (731) is engaged with the inner arc surface of the insertion hole (401), one side of the axial positioning body (72) is in contact with one side of the outer convex end (731), and an intermediate groove is provided between the tail end of the axial positioning body (72) and the conical radial positioning body (73), and a locking tongue assembly (74) is movably engaged in the intermediate groove.

3. The assembled steel-wood composite beam-column node structure according to claim 2, characterized in that: A pressing sleeve section (741) is provided at one edge of the outer arc surface of the locking tongue assembly (74), one end of the pressing sleeve section (741) is connected to the groove between the axial positioning body (72) and the conical radial positioning body (73), and an axial sleeve end (742) is provided on the end surface of the locking tongue assembly (74) away from the pressing sleeve section (741).

4. The assembled steel-wood composite beam-column node structure according to claim 3, characterized in that: An expansion bolt (75) is sleeved on one side surface of the axial sleeve end (742), one end of the expansion bolt (75) penetrates into the interior of the conical radial positioning body (73), an anti-rotation screw sleeve (76) is sleeved on the conical surface of the conical radial positioning body (73), the outer arc surface of the anti-rotation screw sleeve (76) is spirally inserted into the wooden beam (5), and the inner arc surface of the anti-rotation screw sleeve (76) is sleeved on the conical radial positioning body (73).

5. The assembled steel-wood composite beam-column node structure according to claim 4, characterized in that: An expansion sleeve spline (77) is sleeved on one edge of the outer arc surface of the anti-rotation screw sleeve (76), and a key sleeve flap (771) is provided on one side surface of the expansion sleeve spline (77). The outer arc surface of the key sleeve flap (771) is placed inside the wooden beam (5), and one end of the expansion bolt (75) is placed in the inner arc surface of the key sleeve flap (771).

6. A construction method for an assembled steel-wood composite beam-column node structure, the method using the assembled steel-wood composite beam-column node structure according to claim 5, characterized in that: The following steps are involved: S1, steel component assembly stage: slowly push the stress steel beam (2) into the prefabricated cavity (102) of the steel outer beam (1), calibrate with a level during the pushing process to ensure that the axes of the two coincide, and after the sleeve connection is completed, inject non-shrinkage grouting material into the gap of the prefabricated cavity (102), and the grouting needs to be carried out continuously from the bottom to the top of the cavity. After the grouting material is initially solidified, remove the temporary fixing device, and maintain it to the design strength, align the outer end (301) of the steel truss (3) with the dovetail groove (202) of the stress steel beam (2), and insert it by mechanical pressing to ensure that the outer end (301) and the dovetail groove (202) are tightly fitted. After the pressing is completed, check the verticality of the steel truss (3); S2, the assembly stage of the wood components and the connection components: install the fixing frame (71) of the lock tongue component (7) at the preset position of the wood beam (5) and fix it preliminarily with self-tapping screws to ensure that the fixing frame (71) fits the inner wall of the reinforcing sleeve (8), pass the conical radial positioning body (73) through the insertion hole (401) on the square frame (4), pre-tighten the expansion bolt (75), complete the preliminary connection between the lock tongue component (7) and the steel truss (3), and hoist the wood beam (5) to the steel truss (3). ) side, adjust the position so that the connection surface (711) of the lock tongue assembly (7) fits with the square frame (4) and the stress anchor block (6). At this time, the reserved gap between the square frame (4) and the wooden beam (5) needs to be kept uniform. Fix the wooden beam (5) by a temporary fixture, and then tighten the expansion bolt (75) of the lock tongue assembly (7). During the tightening process, monitor the fit of the connection surface (711) synchronously to ensure that the key sleeve flap (771) of the expansion sleeve spline (77) is completely embedded in the wooden beam (5); S3, debugging stage: adjust the position of the stress anchor block (6) so that the bottom end of the arc (601) contacts the connection surface (711) smoothly, fix the stress anchor block (6) on the steel truss (3) with bolts, and check the stability of the stress anchor block (6) after fixing. After the hoisting is completed, check the deflection of the node with a level, apply temporary loads to observe the various connection parts of the node, and check whether there is residual deformation of the component after removing the temporary loads.

Images