Steel tube profile steel recycled concrete column-steel beam connection node structure

Abstract

The invention relates to the technical field of building structures, and particularly discloses a steel tube type recycled concrete column-steel beam connection node structure which comprises a steel tube type recycled concrete column and a steel beam, a section steel framework is arranged in the steel tube type recycled concrete column, and steel fiber rubber recycled concrete is poured in a steel tube of the steel tube type recycled concrete column; the steel pipe type recycled concrete column is composed of a steel pipe on the outer side, a profile steel framework inside and steel fiber rubber recycled concrete. The steel fiber rubber recycled concrete is prepared by mixing recycled aggregate, rubber particles, basalt fibers and ordinary Portland cement. Basalt fiber rubber recycled concrete is used as a column material, and recycled aggregate prepared by recycling construction waste and rubber particles processed by waste tires are used as raw materials, so that the requirements of green sustainable development are met, the waste utilization rate is greatly increased, and the environmental burden is reduced.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, specifically to a steel pipe-type recycled concrete column-steel beam connection node structure. Background Technology

[0002] While the combination of recycled concrete and rubber concrete can achieve waste recycling and improve material toughness, the addition of rubber will lead to a decrease in strength. Although steel-tube steel-concrete composite structures have certain advantages, the organic combination of steel tubes, steel sections and fiber-reinforced rubber recycled concrete is rarely used in current technologies. The failure modes and failure mechanisms of such composite structures are insufficiently studied. The column and beam-column connection nodes of frame structures are critical parts that are prone to failure under extreme loads or seismic action. Existing connection nodes are lacking in load-bearing capacity, seismic performance and green environmental protection synergy, and cannot meet the requirements of high strength, high reliability and resource recycling of building structures. Therefore, we propose a steel-tube steel-concrete recycled concrete column-beam connection node structure. Summary of the Invention

[0003] The purpose of this invention is to provide a steel pipe-type recycled concrete column-steel beam connection node structure to solve the problems of insufficient load-bearing capacity, poor seismic performance, and low resource utilization of existing connection nodes mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe type recycled concrete column-steel beam connection node structure, comprising: a steel pipe type recycled concrete column and a steel beam, wherein a steel frame is provided inside the steel pipe type recycled concrete column, and steel fiber rubber recycled concrete is poured inside the steel pipe of the steel pipe type recycled concrete column. The steel pipe type recycled concrete column is composed of an outer steel pipe, an inner steel frame and steel fiber rubber recycled concrete. The steel fiber rubber recycled concrete is made by mixing recycled aggregate, rubber particles, basalt fiber and ordinary silicate cement. The rubber particles are added in such a way that they replace fine aggregate in equal volume or simultaneously replace coarse and fine aggregate.

[0005] Among them, the outer side of the steel pipe of the steel pipe recycled concrete column is fixedly connected with two outer reinforcing rings, and the steel beam is fixedly connected to one side of the steel pipe of the steel pipe recycled concrete column. The upper and lower flanges of one end of the steel beam are respectively fixedly connected to the two outer reinforcing rings.

[0006] Among them, the outer side of the steel pipe of the steel pipe recycled concrete column is fixedly connected to the outer side of the steel pipe, and the end plate is fixedly connected to one side of the outer pipe by the first bolt. The steel beam is fixedly connected to one side of the end plate.

[0007] The steel beam is set on one side of the end plate. The upper and lower flanges of the steel beam are respectively fixedly connected to the first angle steel, which is fixedly connected to the end plate. The web of the steel beam is respectively fixedly connected to the second angle steel, which is fixedly connected to the end plate. The first angle steel and the second angle steel are respectively fixedly connected to the steel beam and the end plate by the second bolts.

[0008] The steel beam is fixedly connected to a first steel plate and a second steel plate. The first steel plate has a first mounting hole at equal intervals at its beveled overlap, and the second steel plate has a second mounting hole at equal intervals at its beveled overlap. After the first steel plate and the second steel plate overlap, the positions of the first mounting hole and the second mounting hole correspond to each other. Ribs are fixedly connected to the lower sides of the first steel plate and the second steel plate at equal intervals. The ribs are fixedly connected to the steel beam. Shear studs are fixedly connected to the upper side of the steel beam at equal intervals. The shear studs cooperate with the first mounting hole and the second mounting hole. A concrete floor slab is poured on the upper side of the first steel plate and the second steel plate.

[0009] A support assembly is provided between the steel pipe recycled concrete column and the steel beam. The support assembly includes two guide rails, which are fixedly connected to one side of the steel pipe recycled concrete column and the steel beam, respectively. Sliding parts are slidably provided on the inner side of the two guide rails, and mounting seats are fixedly connected to the outer side of the sliding parts. A support is rotatably provided between the two mounting seats. A motor is fixedly connected to the lower side of the guide rail on one side of the steel pipe recycled concrete column. A screw rod that rotates with the guide rail is fixedly connected to the output end of the motor. The screw rod is threadedly connected to the sliding part near the side of the steel pipe recycled concrete column.

[0010] Among them, the two sliding parts are respectively fixedly connected to the housings that are fixedly connected to the mounting bases on both sides. The housings are slidably provided with toothed blocks. The housings are fixedly connected to the housings with first electromagnets that attract the toothed blocks. The toothed blocks are symmetrically fixedly connected to the housings with first springs that are fixedly connected to the housings. The two guide rails are respectively fixedly connected to the two sides with limit teeth.

[0011] The steel-tube recycled concrete column is equipped with an adjustment component on one side. The adjustment component automatically adjusts the angle of the diagonal bracing of the support component according to the detected horizontal and vertical stresses. The adjustment component includes a mounting box fixedly connected to one side of the steel-tube recycled concrete column. A second electromagnet and a third electromagnet are fixedly connected to the upper side of the mounting box. Uniaxial strain gauges are respectively installed in the horizontal and vertical directions of the steel tube column wall of the steel-tube recycled concrete column and in the horizontal and vertical directions of the diagonal bracing end of the support component. A fourth electromagnet and a fifth electromagnet are fixedly connected to the lower side of the mounting box. An angle sensor is installed at the hinge position between the mounting base and the support component.

[0012] The mounting box has two connecting blocks that slide on the upper side inside, and a slider and a mounting block that slide on the lower side inside. A magnet is fixedly connected to one side of the slider, the mounting block, and the two connecting blocks, and a second spring that is fixedly connected to the mounting box is fixedly connected to the other side of the slider, the mounting block, and the two connecting blocks.

[0013] Each of the two connecting blocks has a sliding rod rotatably mounted on one side, and a sleeve rod slidably mounted between the two sliding rods. A mounting plate that is rotatably mounted in the middle of the sleeve rod and slidably mounted with the mounting box is mounted on the middle of the middle of the sleeve rod. A resistor strip is fixedly connected to the upper side of the mounting plate, and a conductive sheet is slidably mounted on the resistor strip. A pressure rod that is fixedly connected to the conductive sheet is fixedly connected to the middle of one side of the sleeve rod. A first switch is mounted on the upper side of the mounting plate, and three second switches are mounted on one side of the mounting block.

[0014] The present invention has at least the following beneficial effects: 1. By using basalt fiber rubber recycled concrete as column material, and using recycled aggregate made from construction waste and rubber granules processed from waste tires as raw materials, it meets the needs of green and sustainable development, greatly improves the utilization rate of waste, and reduces the environmental burden. 2. The incorporation of basalt fiber effectively compensates for the reduced strength of rubber recycled concrete. The combined structure formed by basalt fiber with steel pipes and structural steel fully utilizes the advantages of basalt fiber (lightweight, high strength, and strong corrosion resistance) as well as the constraint and load-bearing function of steel pipes and structural steel, achieving a synergistic effect of "1+1>2", and significantly improving the ultimate load-bearing capacity and stiffness stability of nodes and the overall frame. 3. Three types of connection nodes are provided: rigid, semi-rigid, and hinged. The choice can be made flexibly according to the actual load-bearing requirements, seismic grade, and construction conditions of the project. Rigid nodes have clear force transmission and outstanding load-bearing performance, and are suitable for key parts with strict deformation control. Semi-rigid nodes have excellent seismic performance and are easy to construct. They can consume seismic energy through reasonable deformation. Hinged nodes have strong deformation adaptability and good economy, and are suitable for scenarios with low bending moment transmission requirements. 4. The node structure is scientifically designed. Through the optimized configuration of components such as outer reinforcing rings, outer sleeves, and high-strength bolts, the force transmission path is clear, stress concentration is avoided, and the reliability and durability of the structure under static and dynamic loads are improved. At the same time, the construction cost is reduced and the construction efficiency is improved, resulting in significant technical, economic and social benefits. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the rigid connection node structure in Embodiment 1 of the present invention; Figure 2 This is a front view structural schematic diagram of the rigid connection node structure in Embodiment 1 of the present invention; Figure 3This is a side view of the rigid connection node structure in Embodiment 1 of the present invention. Figure 4 This is a three-dimensional structural diagram of the semi-rigid connection node structure in Embodiment 2 of the present invention; Figure 5 This is a side view of the semi-rigid connection node structure in Embodiment 2 of the present invention; Figure 6 This is a three-dimensional structural diagram of the hinged connection node structure in Embodiment 3 of the present invention; Figure 7 This is a side view of the hinged connection node structure in Embodiment 3 of the present invention; Figure 8 This is a front view structural schematic diagram of the hinged connection node structure in Embodiment 3 of the present invention; Figure 9 This is a cross-sectional view of the steel-tube type recycled concrete column of the present invention, separated from the steel beam; Figure 10 This is a schematic diagram of the node loading device of the present invention; Figure 11 This is a schematic diagram of the seismic loading regime of the present invention; Figure 12 This is a schematic diagram illustrating the research scheme for the failure modes and damage mechanisms of the novel composite structural column of this invention; Figure 13 This is a schematic diagram of the research scheme for the novel combined structure and mechanical properties of the connecting nodes of the present invention; Figure 14 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention; Figure 15 This is a schematic diagram of the overall structure from another perspective of Embodiment 4 of the present invention; Figure 16 This is a schematic diagram of the explosion of the first steel plate and the second steel plate in Embodiment 4 of the present invention; Figure 17 This is a schematic diagram of the support component in Embodiment 5 of the present invention; Figure 18 This is a cross-sectional structural schematic diagram of the guide rail component according to Embodiment 5 of the present invention; Figure 19 This is a cross-sectional structural schematic diagram of the shell in Embodiment 5 of the present invention; Figure 20 This is a cross-sectional structural schematic diagram of the mounting box according to Embodiment 5 of the present invention; Figure 21 This is a schematic diagram of the mounting plate connection structure in Embodiment 5 of the present invention; Figure 22 This is a cross-sectional view of the mounting box in Embodiment 5 of the present invention from another perspective; Figure 23 This is a schematic diagram of the installation block in Embodiment 5 of the present invention.

[0016] In the diagram: 1. Steel pipe type recycled concrete column; 2. Steel beam; 3. Outer reinforcing ring; 4. Outer sleeve; 5. End plate; 6. First bolt; 7. First angle steel; 8. Second angle steel; 9. Second bolt; 10. First steel plate; 11. Second steel plate; 12. Rib plate; 13. Shear stud; 14. First mounting hole; 15. Second mounting hole; 16. Concrete floor slab; 17. Steel frame; 18. Support assembly; 181. Guide rail; 182. Sliding component; 183. Mounting base; 184. Support component; 185. Motor; 186. Lead screw; 187. Housing; 188. Tooth block; 189. 1810. First electromagnet; 1811. Limiting gear; 19. Control assembly; 191. Mounting box; 192. Second electromagnet; 193. Third electromagnet; 194. Connecting block; 195. Magnet block; 196. Second spring; 197. Slide rod; 198. Sleeve rod; 199. Mounting plate; 1910. Resistance strip; 1911. Conductive sheet; 1912. Pressure rod; 1913. First switch; 1914. Fourth electromagnet; 1915. Fifth electromagnet; 1916. Angle sensor; 1917. Second switch; 1918. Slider; 1919. Mounting block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 Please see Figures 1 to 3 , Figure 9 This invention provides a technical solution: a steel pipe-type recycled concrete column-steel beam connection node structure, comprising: a steel pipe-type recycled concrete column 1 and a steel beam 2. The steel pipe-type recycled concrete column 1 has a steel frame 17 inside. The steel pipe of the steel pipe-type recycled concrete column 1 is filled with steel fiber rubber recycled concrete. The steel pipe-type recycled concrete column 1 is composed of an outer steel pipe, an inner steel frame 17, and steel fiber rubber recycled concrete. The steel fiber rubber recycled concrete is made by mixing recycled aggregate, rubber particles, basalt fiber, and ordinary silicate cement. The rubber particles are added in such a way that they replace fine aggregate by an equal volume or simultaneously replace coarse and fine aggregate. The above are common components for rigid, semi-rigid, and hinged connection node types.

[0019] Rigid connection node structure (fully welded rigid connection): The steel tube of the recycled concrete column 1 is a square-section column with a length and width of 300mm, a wall thickness of 8mm, and a height of 1800mm. The steel beam 2 is an I-beam with a cross-sectional dimension of 250mm (height) × 180mm (width) × 6mm (web thickness) × 9mm (flange thickness). Two outer reinforcing rings 3 are fixedly connected to the outside of the steel tube of the recycled concrete column 1. The outer reinforcing ring 3 has a size of D600×T12 (D is the diameter of the ring and T is the thickness) and is welded to the outer wall of the steel tube of the recycled concrete column 1. The steel beam 2 is welded to one side of the steel tube of the recycled concrete column 1, and the upper and lower flanges of one end of the steel beam 2 are respectively welded and fixed to the two outer reinforcing rings 3.

[0020] The rigid connection node, through the combination of a fully welded structure and an outer reinforcing ring 3, achieves extremely high integrity, reliably transmitting axial force, shear force, bending moment, and torque. This effectively avoids localized damage caused by stress concentration and significantly enhances the ultimate bearing capacity of the node and the overall frame. The outer reinforcing ring 3 ensures the integrity of the steel pipe, and the welding fixing method results in high node stiffness and small deformation. Under static and dynamic loads, it can maintain the stability of the frame structure, making it particularly suitable for critical building parts with high load-bearing requirements and strict deformation control, such as nodes around the core tube of high-rise buildings and frame nodes under heavy loads. At the same time, the synergistic effect of basalt fiber rubber recycled concrete, steel pipe, and steel frame 17 ensures load-bearing performance while achieving waste recycling, thus balancing structural safety and environmental protection requirements.

[0021] Example 2 Semi-rigid connection node structure (welded + bolted semi-rigid connection): like Figure 4 , Figure 5 As shown, an outer sleeve 4 is fixedly connected to the outside of the steel pipe of the steel pipe type recycled concrete column 1. The outer sleeve 4 has dimensions of L300×300×H420×T18 (L is the side length, H is the height, and T is the thickness). An end plate 5 is fixedly connected to one side of the outer sleeve 4 by a first bolt 6. The end plate 5 has dimensions of L180×H420×T20 (L is the side length, H is the height, and T is the thickness). The steel beam 2 is welded to one side of the end plate 5. The first bolt 6 is an M24 bolt with a strength grade of 10.9. The structural parameters of the steel pipe and steel beam 2 of the steel pipe type recycled concrete column 1 are consistent with those of Example 1.

[0022] The semi-rigid connection of welding and bolts balances connection strength and construction flexibility. The welded and fixed steel beam 2 ensures the stability of the core area of ​​the node, while the high-strength bolt connection reduces the reliance on complex welding processes in on-site construction, facilitates assembly and adjustment, and effectively improves construction efficiency and reduces construction costs. Under seismic action, this node can dissipate energy through the slight deformation of the bolt connection and the synergistic effect of materials. At the same time, the outer sleeve 4 effectively restrains the ends of the column, further enhancing the load-bearing stability of the composite structural column. It is suitable for mid-to-high-rise frame structures in seismic fortification areas and can achieve a balance between engineering economy and seismic reliability while ensuring structural safety.

[0023] Example 3 Hinged connection node structure (all bolted connection): like Figures 6 to 8 As shown, based on Embodiment 2, in this embodiment, the steel beam 2 is no longer welded to the end plate 5, but is connected and fixed by angle steel and bolts. Specifically, the steel beam 2 is set on one side of the end plate 5. The upper and lower flanges of the steel beam 2 are respectively fixedly connected to the first angle steel 7, which is fixedly connected to the end plate 5. The web of the steel beam 2 is respectively fixedly connected to the second angle steel 8, which is fixedly connected to the end plate 5. The first angle steel 7 and the second angle steel 8 are respectively fixedly connected to the steel beam 2 and the end plate 5 by the second bolt 9. The dimensions of the first angle steel 7 and the second angle steel 8 are L85×172×H180×T12 (L is the side length, H is the height, and T is the thickness). The second bolt 9 adopts the M24 specification and the bolt strength grade is 10.9.

[0024] The fully bolted joint design, through the combination of angle steel connectors, outer sleeve 4, steel beam 2, and end plate 5, ensures uniform stress distribution and avoids localized stress concentration. Compared to fully welded joints, this design significantly improves construction convenience, eliminating the need for large-scale on-site welding, shortening the construction cycle, and facilitating disassembly and adjustment during later maintenance or structural modifications. Furthermore, the relative rotation characteristics allowed by this joint structure effectively adapt to the deformation requirements of the structure under wind loads and seismic actions, reducing internal stress accumulation and preventing component damage due to deformation constraints. Simultaneously, the constraint effect of the outer sleeve 4 on the column ends, combined with the toughness of the basalt fiber rubber recycled concrete, ensures the load-bearing stability of the joint within the allowable deformation range. This design is suitable for structural components with lower moment transfer requirements and a focus on cost-effectiveness, such as secondary beam-column joints in multi-story frame structures and temporary building frames. It achieves cost savings and improved construction efficiency while meeting functional requirements.

[0025] like Figure 10 , Figure 11As shown, based on the dimensions of the combined components and the connection node parameters in Embodiments 1, 2, and 3, the specimens required for the model test were fabricated. For rigid, semi-rigid, and hinged connection nodes, a loading device for the test was constructed. Figure 10 ),according to Figure 11 Loading tests were conducted under the loading regime shown, and the response of the test model was measured using displacement gauges, strain gauges, etc. The correctness of the theoretical and numerical simulation results was verified through model tests.

[0026] Furthermore, a research scheme was developed for the failure modes and damage mechanisms of steel-tube steel fiber-recycled rubber composite structural columns. Fiber-recycled rubber concrete is made by incorporating rubber particles into recycled concrete in a certain proportion, and randomly adding basalt fibers at a certain percentage. Recycled rubber concrete has advantages such as being lightweight, environmentally friendly, tough, and having strong bending resistance. However, the addition of rubber reduces the strength of the recycled concrete. Reinforcing fibers can endow recycled rubber concrete with high strength, high temperature resistance, and corrosion resistance, among other mechanical and chemical properties. Reinforcing fibers are often made of steel fibers, glass fibers, polypropylene fibers, carbon fibers, and basalt fibers. Basalt fibers have advantages such as being lightweight, high-strength, cost-effective, high-temperature resistant, and corrosion-resistant. The matrix material of recycled rubber concrete consists of ordinary silicate cement, rubber particles, and recycled concrete particles. It is inexpensive, environmentally friendly, and has good mechanical properties, and can deform well in synergy with basalt fibers. The rubber particles, recycled aggregates, and basalt fibers are randomly distributed and combined in proportions, allowing the synthesized basalt fiber-recycled rubber concrete material to fully utilize the advantages of both reinforcing fibers and rubber particles.

[0027] Reinforcing fibers in rubber-recycled concrete can be arranged in unidirectional, orthogonal, and random orientations. Using experimental methods, self-consistent methods, and numerical simulations, this study investigates the failure modes and mechanisms of novel composite structural columns. The research scheme for the failure modes and mechanisms of novel composite structural columns is as follows: Figure 12 As shown.

[0028] First, the material mechanical property parameters of the reinforcing fiber were obtained through uniaxial tests. Second, the two-dimensional and three-dimensional fiber orientation distribution functions of the reinforcing fiber were established using Fourier series and Wigner distribution function, as shown in Equations (1) and (2), respectively. Third, the equivalent physical equation of basalt fiber rubber recycled concrete was established, as shown in Equation (3), and the equivalent elastic tensor of basalt fiber rubber recycled concrete was calculated using the self-consistent method. Fourth, the basic equation for elastic mechanical calculation of basalt fiber rubber recycled concrete was established. Fifth, the existing strength criteria were modified by combining the existing Hill and Tsai-Hill strength criteria and considering the mechanical properties of basalt fiber and concrete matrix. Finally, the failure mode and failure mechanism of steel tube basalt fiber rubber recycled concrete columns were determined.

[0029]

[0030] (1) In the formula, , Representing complex numbers conjugate, It is called the fiber distribution coefficient and satisfies the equation .

[0031] In equation (2), the following conditions are met: , , and They represent and . conjugate.

[0032] (3) In the formula, The volume-mean stress tensor, For volume-average strain tensor, It is the equivalent elastic tensor.

[0033] This study applies steel-tube composite columns made of steel fiber rubber and recycled concrete, along with their connection nodes, to key components of a frame structure. The impact parameters of this novel composite column structure and the type of connection node on the overall structural ultimate bearing capacity and seismic performance are investigated. Based on the failure modes and mechanisms of basalt fiber rubber recycled concrete columns, the mechanical properties of the steel-tube composite columns, connection nodes, and frame structural units are studied through both theoretical analysis and numerical simulation. First, numerical simulations were used to investigate the effects of factors such as axial compression ratio, recycled aggregate replacement rate, fiber incorporation ratio, and steel ratio on the static and dynamic mechanical properties of a novel composite structural column. Second, theoretical analysis and numerical simulations were used to study the ultimate bearing capacity of three types of connection nodes, revealing the failure modes and failure mechanisms of these nodes. Third, based on the research results, a composite structural column-steel beam 2-frame unit containing connection nodes was constructed, and numerical simulations were used to study the static and dynamic mechanical properties of the frame unit under different load conditions. Finally, through theoretical analysis and numerical simulations, a mechanical calculation model of a two-story frame structure of the novel composite structural column-steel beam 2-frame was established to study the ultimate bearing capacity and seismic performance of the overall structure. The research scheme for the mechanical properties of the novel composite structure and connection nodes is as follows: Figure 13 As shown.

[0034] Example 4 like Figures 14 to 16As shown, a first steel plate 10 and a second steel plate 11 are fixedly connected to the upper side of the steel beam 2. The ends of the first steel plate 10 and the second steel plate 11 are beveled. The first steel plate 10 and the second steel plate 11 are overlapped through the beveled position. By setting the beveled and gradually varying thickness, stress transmission can be smoothed, stress concentration can be avoided, crack resistance and shear bearing capacity can be improved, and the risk of cracking of the steel plate or tearing of the weld in the overlap area can be effectively reduced.

[0035] The first steel plate 10 has a first mounting hole 14 at equal intervals at the beveled overlap, and the second steel plate 11 has a second mounting hole 15 at equal intervals at the beveled overlap. After the first steel plate 10 and the second steel plate 11 overlap, the positions of the first mounting hole 14 and the second mounting hole 15 correspond to each other.

[0036] Ribs 12 are welded at equal intervals to the lower sides of the first steel plate 10 and the second steel plate 11. The ribs 12 are welded and fixed to the steel beam 2. The ribs 12 can enhance the support stability after the first steel plate 10 and the second steel plate 11 overlap and are connected.

[0037] Shear studs 13 are welded at equal intervals on the upper side of the steel beam 2. The shear studs 13 mate with the first mounting hole 14 and the second mounting hole 15. The shear studs 13 pass through the first mounting hole 14 and the second mounting hole 15 and are welded to the first steel plate 10 and the second steel plate 11. After the first steel plate 10 and the second steel plate 11 overlap, they are welded and fixed to the steel beam 2, which can make the first steel plate 10 and the second steel plate 11 form a whole with the steel beam 2, improve the overall stability of the structure, and reduce the risk of node failure. Butyl rubber sealant can be applied to the overlap of the first steel plate 10 and the second steel plate 11 to prevent grout leakage during concrete pouring.

[0038] A concrete floor slab 16 is poured on the upper side of the first steel plate 10 and the second steel plate 11. The first steel plate 10 and the second steel plate 11 together constitute the pouring template of the concrete floor slab 16 and simultaneously serve as the built-in load-bearing shell components of the concrete floor slab 16. They not only undertake the formwork support function during the concrete pouring stage, but also form an integral load-bearing system with the floor slab after the concrete hardens, participating in the load-bearing work of the floor slab. The steel reinforcement skeleton of the concrete floor slab 16 can be fixed with shear studs 13. The shear studs 13 penetrate the first steel plate 10 and the second steel plate 11 and are embedded in the concrete floor slab 16. Through the anchoring effect of the shear studs 13 into the concrete floor slab 16, the first steel plate 10, the second steel plate 11, the steel beam 2, and the concrete floor slab 16 can work together to bear the load, giving full play to the mechanical properties of the composite structure.

[0039] Example 5 like Figures 17 to 23As shown, a support assembly 18 is provided between the steel pipe recycled concrete column 1 and the steel beam 2. The support assembly 18 includes two guide rails 181, which are fixedly connected to one side of the steel pipe recycled concrete column 1 and the steel beam 2, respectively. Sliding members 182 are slidably arranged on the inner side of the two guide rails 181, and mounting seats 183 are fixedly connected to the outer side of the sliding members 182. A support member 184 is rotatably arranged between the two mounting seats 183, providing oblique support for the beam-column joint position. A motor 185 is fixedly connected to the lower side of the guide rail 181 on one side of column 1. The output end of the motor 185 is fixedly connected to a lead screw 186 that is rotatably connected to the guide rail 181. The lead screw 186 is threadedly connected to the sliding member 182 on the side near the steel pipe type recycled concrete column 1. By controlling the rotation of the lead screw 186 driven by the motor 185, the sliding member 182 on the side near the steel pipe type recycled concrete column 1 is driven to move up and down, thereby adjusting the oblique support angle of the support member 184 and making the sliding member 182 on the lower side of the steel beam 2 move horizontally.

[0040] Two sliding members 182 are respectively fixedly connected to housings 187 that are fixedly connected to mounting bases 183 on both sides. A toothed block 188 is slidably arranged inside the housing 187. A first electromagnet 189 that attracts the toothed block 188 is fixedly connected inside the housing 187. A first spring 1810 that is fixedly connected to the housing 187 is symmetrically fixedly connected inside the toothed block 188. Limiting toothed members 1811 are respectively fixedly connected to both sides of the two guide rail members 181. The limiting toothed members 1811 cooperate with the toothed block 188. The limiting toothed member 1811 on the side closer to the steel pipe recycled concrete column 1 is fixed to the steel pipe column wall of the steel pipe recycled concrete column 1, and the limiting toothed member 1811 on the side closer to the steel beam 2 is fixed to the steel beam 2. Initially, the first electromagnet 189 is in a de-energized state. Under the elastic force of the first spring 1810, the toothed block 188 is engaged and fixed with the limiting toothed member 1811 on the corresponding side, thereby improving the support stability of the support member 184.

[0041] A regulating component 19 is provided on one side of the steel pipe recycled concrete column 1. The regulating component 19 automatically adjusts the angle of the diagonal bracing of the support component 18 according to the detected horizontal and vertical stresses. The regulating component 19 includes a mounting box 191 fixedly connected to one side of the steel pipe recycled concrete column 1. A second electromagnet 192 and a third electromagnet 193 are fixedly connected to the upper side of the inside of the mounting box 191. The steel pipe column wall of the steel pipe recycled concrete column 1 is provided with horizontal and vertical directions, and the diagonal bracing ends of the support component 184 are provided with horizontal and vertical directions respectively. A uniaxial strain gauge (not shown in the figure; the installation of the strain gauge is an existing technology application) is installed in the horizontal direction at the end of the diagonal brace of the steel pipe column wall and support member 184 of the steel pipe recycled concrete column 1. The sensitive axis of the uniaxial strain gauge is installed in the horizontal direction to detect horizontal stress and is electrically connected to the second electromagnet 192. The sensitive axis of the uniaxial strain gauge is installed in the vertical direction at the end of the diagonal brace of the steel pipe column wall and support member 184 of the steel pipe recycled concrete column 1. The sensitive axis of the uniaxial strain gauge is installed in the vertical direction to detect vertical stress and is electrically connected to the third electromagnet 193.

[0042] The fourth electromagnet 1914 and the fifth electromagnet 1915 are fixedly connected inside the lower side of the mounting box 191. An angle sensor 1916 is installed at the hinge position between the mounting base 183 and the support member 184 to detect the tilt angle of the support member 184. The angle sensor 1916 is electrically connected to the fifth electromagnet 1915.

[0043] Two connecting blocks 194 are slidably arranged on the upper side inside the mounting box 191, and a slider 1918 and a mounting block 1919 are slidably arranged on the lower side inside the mounting box 191. Limiting grooves adapted to the two connecting blocks 194, slider 1918, and mounting block 1919 are respectively provided on the inner side of the mounting box 191. The two connecting blocks 194, slider 1918, and mounting block 1919 are slidably arranged along the corresponding limiting grooves, which can play a guiding and limiting role. A magnet block 195 is fixedly connected to one side of the slider 1918, mounting block 1919, and two connecting blocks 194 respectively. The magnet block 195 repels the second electromagnet 192, the third electromagnet 193, the fourth electromagnet 1914, and the fifth electromagnet 1915 respectively. A second spring 196 fixedly connected to the mounting box 191 is fixedly connected to the other side of the slider 1918, mounting block 1919, and two connecting blocks 194 respectively.

[0044] Two connecting blocks 194 are each rotatably equipped with a sliding rod 197 on one side. A sleeve rod 198 is slidably arranged between the two sliding rods 197. The sliding rods 197 slide along the inner side of the sleeve rod 198. A mounting plate 199 is rotatably arranged in the middle of the sleeve rod 198 and slidably arranged with the mounting box 191. A guide groove adapted to the mounting plate 199 is provided on the inner side of the mounting box 191. The mounting plate 199 slides along the guide groove, which can guide and limit the movement of the mounting plate 199. A resistor strip 1910 is fixedly connected to the upper side of the mounting plate 199. A conductive sheet 1911 is slidably arranged on the resistor strip 1910. The resistor strip 1910 is connected to the fourth electromagnetic through the conductive sheet 1911. Iron 1914 is electrically connected, and the resistance value of the resistor bar 1910 located on the side of the conductive sheet 1911 near the second electromagnet 192 is connected to the circuit; a pressure rod 1912 fixedly connected to the conductive sheet 1911 is fixedly connected to the middle of one side of the sleeve rod 198; a first switch 1913 is provided on the upper side of the mounting plate 199; the two ends of the pressure rod 1912 located on the upper side of the first switch 1913 are set with arc-shaped end faces to facilitate pressing the first switch 1913; three second switches 1917 are provided on one side of the mounting block 1919; the slider 1918 near the mounting block 1919 is set with an arc-shaped end face to facilitate pressing the second switches 1917.

[0045] By using uniaxial strain gauges positioned horizontally and vertically, the horizontal and vertical stresses at the node locations are detected. When the detected stress is high, the repulsive force generated by the second electromagnet 192 and the third electromagnet 193 on the magnet block 195 is relatively strong, causing the two connecting blocks 194 to move away from the second electromagnet 192. The second spring 196 is compressed. When there is a difference between the detected horizontal and vertical stresses, the sleeve 198 will rotate via the sliding rods 197 on both sides. For example, if the detected horizontal stress is greater than the vertical stress, it will cause the sleeve 194 to move closer to the second electromagnet 192. The relatively large movement distance of the connecting block 194 on one side causes the sleeve rod 198 to rotate away from the second electromagnet 192. The rotation of the pressure rod 1912 can drive the conductive sheet 1911 to rotate synchronously, increasing the resistance value of the resistor strip 1910. This reduces the repulsive effect of the fourth electromagnet 1914 on the magnet block 195. Under the elastic force of the second spring 196 on one side of the mounting block 1919, the mounting block 1919 moves closer to the fourth electromagnet 1914, causing the slider 1918 to press against the fifth electromagnet 191. If the deflection of the second switch 1917 on side 5 still allows the pressure rod 1912 to press against the first switch 1913, it indicates that the difference between the horizontal and vertical stresses has not exceeded the threshold range. In this case, the motor 185 will not be triggered, meaning the angle of the support member 184 will not be adjusted. If the deflection of the pressure rod 1912 causes it to no longer press against the first switch 1913, it indicates that the threshold range has been exceeded and the horizontal stress is dominant. In this case, the motor 185 will be controlled to drive the lead screw 186 to rotate, driving the lower sliding member 182 to move upward, thus adjusting the angle of the support member 184. The angle of the support member 184 is reduced so that the support member 184 can share a larger horizontal force and suppress lateral deformation. The angle sensor 1916 detects the support angle of the support member 184. As the angle of the support member 184 decreases, the repulsive effect of the fifth electromagnet 1915 on the magnet block 195 will decrease, causing the slider 1918 to move closer to the fifth electromagnet 1915. When the slider 1918 moves to press against the second switch 1917 on the middle side, the motor 185 will be controlled to stop working, and the adjustment of the support angle of the support member 184 is completed. Conversely, when the detected vertical stress is greater than the horizontal stress, the sleeve rod 198 will cause the pressure rod 1912 to deflect closer to the second electromagnet 192, reducing the resistance value of the resistor strip 1910. This increases the repulsive force of the fourth electromagnet 1914 on the magnet block 195, causing the mounting block 1919 to move away from the fourth electromagnet 1914. This will cause the slider 1918 to press against the second switch 1917 near the fifth electromagnet 1915. If the first switch 1913 is still pressed by the pressure rod 1912 at this time, the adjustment of the support angle of the support member 184 will not be triggered. If the pressure rod 1912 does not press against the first switch 1913, it indicates that the threshold range has been exceeded, and the motor will be controlled. 185 drives the lead screw 186 to reverse, causing the lower sliding member 182 to move downward, increasing the angle of the support member 184. When vertical stress is dominant, the vertical force is mainly transmitted through the angle of the support member 184, reducing the axial compressive stress of the component. As the support angle of the support member 184 detected by the rotation sensor 1916 increases, the slider 1918 can move away from the fifth electromagnet 1915. When the slider 1918 moves to the point of contacting the second switch 1917 on the middle side, the motor 185 will be controlled to stop working. Thus, the support angle of the support member 184 can be adaptively adjusted according to the magnitude of the horizontal and vertical stresses, improving the load-bearing capacity of the beam-column joint, suppressing lateral deformation, and improving applicability.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel pipe-shaped recycled concrete column-steel beam connection node structure, characterized in that: include: Steel-tube type recycled concrete columns and steel beams, wherein the steel-tube type recycled concrete columns are provided with a steel frame inside, and steel fiber rubber recycled concrete is poured inside the steel tubes of the steel-tube type recycled concrete columns. The steel-tube type recycled concrete columns are composed of outer steel tubes, inner steel frame and steel fiber rubber recycled concrete. The steel fiber rubber recycled concrete is made by aggregate mixing of recycled aggregate, rubber particles, basalt fiber and ordinary Portland cement. The rubber particles are added in such a way that they replace fine aggregate in equal volume or simultaneously replace coarse and fine aggregate.

2. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 1, characterized in that: The steel tube of the recycled concrete column has two outer reinforcing rings fixedly connected to the outside of the steel tube. The steel beam is fixedly connected to one side of the steel tube of the recycled concrete column, and the upper and lower flanges of one end of the steel beam are fixedly connected to the two outer reinforcing rings respectively.

3. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 1, characterized in that: The outer sleeve is fixedly connected to the outside of the steel pipe of the steel pipe recycled concrete column. An end plate is fixedly connected to one side of the outer sleeve by a first bolt. The steel beam is fixedly connected to one side of the end plate.

4. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 3, characterized in that: The steel beam is set on one side of the end plate. The upper and lower flanges of the steel beam are respectively fixedly connected to the end plate with first angle steel. The web of the steel beam is respectively fixedly connected to the end plate with second angle steel. The first angle steel and the second angle steel are respectively fixedly connected to the steel beam and the end plate by second bolts.

5. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 3, characterized in that: A first steel plate and a second steel plate are fixedly connected to the upper side of the steel beam. The first steel plate has a first mounting hole at equal intervals at its beveled overlap, and the second steel plate has a second mounting hole at equal intervals at its beveled overlap. After the first steel plate and the second steel plate overlap, the positions of the first mounting hole and the second mounting hole correspond to each other. Ribs are fixedly connected to the lower side of the first steel plate and the second steel plate at equal intervals. The ribs are fixedly connected to the steel beam. Shear studs are fixedly connected to the upper side of the steel beam at equal intervals. The shear studs cooperate with the first mounting hole and the second mounting hole. A concrete floor slab is poured on the upper side of the first steel plate and the second steel plate.

6. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 3, characterized in that: A support assembly is provided between the steel tube recycled concrete column and the steel beam. The support assembly includes two guide rails, which are respectively fixedly connected to one side of the steel tube recycled concrete column and the steel beam. Sliding members are slidably arranged on the inner side of each of the two guide rails, and mounting seats are fixedly connected to the outer side of each sliding member. A support member is rotatably arranged between the two mounting seats. A motor is fixedly connected to the lower side of the guide rail on one side of the steel tube recycled concrete column. A lead screw that rotates with the guide rail is fixedly connected to the output end of the motor. The lead screw is threadedly connected to the sliding member near the side of the steel tube recycled concrete column.

7. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 6, characterized in that: Each of the two sliding members has a housing fixedly connected to its side and a mounting base. A toothed block is slidably arranged inside the housing. A first electromagnet that attracts the toothed block is fixedly connected inside the housing. A first spring that is fixedly connected to the housing is symmetrically fixedly connected inside the toothed block. Limiting toothed members are fixedly connected to each of the two guide rail members.

8. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 6, characterized in that: A control component is provided on one side of the steel tube recycled concrete column. The control component automatically adjusts the angle of the diagonal bracing of the support component according to the detected horizontal and vertical stresses. The control component includes a mounting box fixedly connected to one side of the steel tube recycled concrete column. A second electromagnet and a third electromagnet are fixedly connected to the upper side of the mounting box. Uniaxial strain gauges are respectively installed in the horizontal and vertical directions of the steel tube column wall of the steel tube recycled concrete column and in the horizontal and vertical directions of the diagonal bracing end of the support component. A fourth electromagnet and a fifth electromagnet are fixedly connected to the lower side of the mounting box. An angle sensor is installed at the hinge position between the mounting base and the support component.

9. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 8, characterized in that: Two connecting blocks are slidably arranged on the upper side inside the mounting box, and a slider and a mounting block are slidably arranged on the lower side inside the mounting box. A magnet is fixedly connected to one side of the slider, the mounting block, and the two connecting blocks, and a second spring fixedly connected to the mounting box is fixedly connected to the other side of the slider, the mounting block, and the two connecting blocks.

10. The steel-tube steel recycled concrete column-steel beam connection node structure according to claim 9, characterized in that: Each of the two connecting blocks has a sliding rod rotatably mounted on one side, and a sleeve rod is slidably mounted between the two sliding rods. A mounting plate that is rotatably mounted in the middle of the sleeve rod and slidably mounted with the mounting box is mounted on the middle of the middle of the sleeve rod. A resistor strip is fixedly connected to the upper side of the mounting plate, and a conductive sheet is slidably mounted on the resistor strip. A pressure rod that is fixedly connected to the conductive sheet is fixedly connected to the middle of one side of the sleeve rod. A first switch is mounted on the upper side of the mounting plate, and three second switches are mounted on one side of the mounting block.

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