Steel-concrete composite joint and steel-concrete composite system

Abstract

This invention relates to the field of steel-concrete composite joint construction technology, and more particularly to a steel-concrete composite joint and a steel-concrete composite system. The steel-concrete composite joint includes: a concrete column, which is connected to a steel beam via a connecting component; the connecting component includes a support mechanism and a fixing mechanism, the support mechanism being used to support the steel beam, and the fixing mechanism being used to fix the steel beam; a humidity response component, which includes a water vapor adsorption mechanism, a sealing mechanism, and a damping enhancement mechanism. The water vapor adsorption mechanism is used to adsorb water vapor around the connection of the steel beam. After the water vapor adsorption mechanism absorbs water and expands, it triggers the opening of the sealing mechanism and the damping enhancement mechanism. The sealing mechanism is used to seal the connection between the fixing mechanism and the steel beam, and the damping enhancement mechanism is used to increase the damping force around the fixing mechanism. This invention takes into account waterproof, corrosion-resistant, and vibration-resistant performance, effectively improving the durability and reliability of the steel-concrete composite joint in humid and complex environments.

Description

Technical Field

[0001] This invention relates to the field of steel-concrete composite joint construction technology, specifically to a steel-concrete composite joint and a steel-concrete composite system. Background Technology

[0002] In modern power structure construction, prefabricated construction of concrete structures is becoming increasingly common, but its connection technology faces significant challenges, particularly difficulties in connection and low construction efficiency. Traditional concrete connection methods not only have long construction cycles but are also costly, impacting the flexibility and economy of construction.

[0003] Traditional steel-concrete composite joints have long faced three core problems in humid environments (such as power substations and coastal transmission tower foundations): First, the connection points (such as the fixing mechanisms between steel beams and concrete columns) are susceptible to moisture erosion, with prominent corrosion of steel components and deterioration of concrete, leading to a decrease in joint durability; Second, existing sealing structures are mostly passive protection (such as static sealants), which cannot actively respond to changes in environmental humidity, making it difficult to achieve effective fixation after moisture penetration, thus exacerbating the risk of corrosion inside the connection joint; Third, when the joint is subjected to vibration in humid environments (such as equipment operation and wind-induced vibration), the damping of traditional fixing mechanisms is insufficient, which can easily lead to loosening of the connection and affect structural safety. Summary of the Invention

[0004] The purpose of this invention is to provide steel-concrete composite joints and steel-concrete composite systems to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] On the one hand, a steel-concrete composite joint is provided, comprising:

[0007] A concrete column, wherein the concrete column is connected to a steel beam by a connecting assembly;

[0008] The connecting assembly includes a support mechanism and a fixing mechanism, wherein the support mechanism is used to support the steel beam and the fixing mechanism is used to fix the steel beam.

[0009] A humidity response component includes a water vapor adsorption mechanism, a sealing mechanism, and a damping enhancement mechanism. The water vapor adsorption mechanism is used to adsorb water vapor around the connection of the steel beam. After the water vapor adsorption mechanism absorbs water and expands, it will trigger the opening of the sealing mechanism and the damping enhancement mechanism. The sealing mechanism is used to seal the connection between the fixing mechanism and the steel beam, and the damping enhancement mechanism is used to increase the damping force around the fixing mechanism.

[0010] Preferably, the support mechanism includes a steel column body, a connecting plate, and a connecting angle iron. The steel column body is fixedly connected to the concrete column, the connecting plate is fixedly connected to the steel column body, and a plurality of steel beams are connected around the connecting plate. A connecting angle iron is provided at the connection between the connecting plate and the steel beams, and the fixing mechanism is used to connect the steel beams and the connecting angle iron.

[0011] Preferably, the fixing mechanism includes a fixing bolt and a fixing box. The fixing bolt is used to connect the connecting angle iron to the steel beam. The fixing box has a threaded hole, and one side of the fixing bolt is connected to the threaded hole.

[0012] Preferably, the fixing box is provided with an adjustment cavity, the adjustment cavity and the threaded hole are interconnected, the water vapor adsorption mechanism includes a piston cylinder, a water absorption expansion block and a guide pipe, the piston cylinder is disposed in the adjustment cavity, the water absorption expansion block is disposed in the piston cylinder, and the guide pipe is used to connect one side of the piston cylinder to the outside.

[0013] Preferably, the water-absorbing and expanding block is made of sodium polyacrylate.

[0014] Preferably, the sealing mechanism includes a piston rod, a compression spring, and a sealing ring. One end of the piston rod is connected to the piston cylinder, and the other end of the piston rod passes through the piston cylinder and is connected to the sealing ring. The compression spring is sleeved on the piston rod, and its two ends are respectively connected to the piston rod and the side wall of the piston cylinder. When the water-absorbing expansion block absorbs water and expands, it will push the piston rod to move along the piston cylinder and compress the compression spring, so that the sealing ring is tightly attached to the connection between the fixing bolt and the threaded hole.

[0015] Preferably, the adjusting chamber has a ratchet groove, and the damping enhancement mechanism includes a one-way valve, a connecting pipe, a hydraulic push rod, a ratchet block, and a reinforcing block. The one-way valve is connected to the piston cylinder, and the one-way valve is connected to the hydraulic push rod through the connecting pipe. The hydraulic push rod is connected to the ratchet block, and the ratchet block is connected to the reinforcing block.

[0016] Preferably, the steel beam includes an upper end plate and a lower end plate, which together form the steel beam, and the upper end plate and the lower end plate are connected by connecting bolts.

[0017] Preferably, the upper end plate has grouting holes.

[0018] On the other hand, a steel-concrete composite system is provided, including the aforementioned steel-concrete composite node.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The water vapor adsorption mechanism of the present invention can actively absorb water and expand according to the ambient humidity, triggering the sealing mechanism to close the gap at the connection, blocking water vapor infiltration, and solving the problem that traditional passive sealing cannot provide dynamic protection; at the same time, the expansion process simultaneously activates the damping enhancement mechanism, increasing the damping force around the fixing mechanism, efficiently dissipating vibration energy, and reducing the risk of fatigue damage; in addition, the entire structure does not require external energy input, and can be self-maintained for a long time by relying on water vapor phase change and material properties, taking into account waterproof, anti-corrosion and vibration resistance performance, effectively improving the durability and reliability of steel-concrete composite joints in humid and complex environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 (The concrete column is made transparent).

[0022] Figure 3 This is a schematic diagram of the connection structure between the steel column body and the connecting plate of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the steel beam of the present invention (the upper end plate on one side is shown in perspective).

[0024] Figure 5 This is a three-dimensional structural diagram of the fixing box of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the fixing box of the present invention (the fixing box is shown in perspective).

[0026] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the fixing box of the present invention;

[0027] Figure 8 This is a cross-sectional view of the fixing box structure of the present invention;

[0028] Figure 9 This is a schematic cross-sectional view of the piston cylinder of the present invention;

[0029] Figure 10 This is a schematic diagram of the internal structure of the piston cylinder of the present invention (the piston cylinder is shown in perspective).

[0030] Figure 11 This is a schematic diagram showing the positions and structures of the piston rod, compression spring, and sealing ring of the present invention;

[0031] Figure 12 This is a schematic diagram of the connection structure between the guide tube and the piston cylinder of the present invention.

[0032] In the diagram: 1 Concrete column, 2 Steel column body, 3 Connecting plate, 4 Connecting angle iron, 5 Fixing bolt, 6 Fixing box, 7 Piston cylinder, 8 Water absorption expansion block, 9 Guide pipe, 10 Piston rod, 11 Compression spring, 12 Sealing ring, 13 Racket groove, 14 One-way valve, 15 Connecting pipe, 16 Hydraulic push rod, 17 Racket block, 18 Reinforcing block, 19 Upper end plate, 20 Lower end plate, 21 Connecting bolt, 22 Grouting hole, 601 Threaded hole. Detailed Implementation

[0033] 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.

[0034] Please see Figure 1-12 The present invention provides a technical solution:

[0035] A steel-concrete composite joint, as shown in the attached instruction manual. Figure 1 As shown, it includes:

[0036] Concrete column 1, which is connected to a steel beam via a connecting assembly;

[0037] The connecting assembly includes a support mechanism and a fixing mechanism. The support mechanism is used to support the steel beam, and the fixing mechanism is used to fix the steel beam.

[0038] The humidity response component includes a water vapor adsorption mechanism, a sealing mechanism, and a damping enhancement mechanism. The water vapor adsorption mechanism is used to adsorb water vapor around the connection of the steel beam. After the water vapor adsorption mechanism absorbs water and expands, it will trigger the opening of the sealing mechanism and the damping enhancement mechanism. The sealing mechanism is used to seal the connection between the fixing mechanism and the steel beam, and the damping enhancement mechanism is used to increase the damping force around the fixing mechanism.

[0039] The support structure includes a steel column body 2, a connecting plate 3, and a connecting angle iron 4. The steel column body 2 is fixedly connected to the inside of the concrete column 1. During use, the steel column body 2 and the steel bars inside the concrete column 1 are connected together by welding (the steel bars inside the concrete column 1 are not shown in the attached drawings of the specification, but are hereby mentioned). The connecting plate 3 is fixedly connected to the outside of the steel column body 2 by welding (in this embodiment, the welded part between the connecting plate 3 and the steel column body 2 is inside the concrete column 1). Then, during grouting, the steel column body 2 is fixed inside the concrete body. Several steel beams are connected around the connecting plate 3. A connecting angle iron 4 is provided at the connection between the connecting plate 3 and the steel beams. The fixing mechanism is used to connect the steel beams and the connecting angle iron 4.

[0040] The fixing mechanism includes a fixing bolt 5 and a fixing box 6. The fixing bolt 5 is used to fix the connecting angle iron 4 to the steel beam. In this embodiment, the fixing bolt 5 is an external hexagonal bolt. The fixing box 6 has a threaded hole 601. The threaded side of the fixing bolt 5 is connected to the threaded hole 601.

[0041] The fixed box 6 is provided with an adjustment chamber, which is used to install the water vapor adsorption mechanism, the sealing mechanism, and the damping enhancement mechanism. The adjustment chamber and the threaded hole 601 are interconnected. The water vapor adsorption mechanism includes a piston cylinder 7, a water absorption expansion block 8, and a guide pipe 9. The piston cylinder 7 is located inside the adjustment chamber and is used to store the water absorption expansion block 8 to protect it. The water absorption expansion block 8 is located in the piston cylinder 7 and is used to adsorb water vapor to keep the fixing bolt 5 dry. The diameter of the guide pipe 9 gradually increases from the side closest to the piston cylinder 7 to the outside. The guide pipe 9 is used to connect one side of the piston cylinder 7 to the outside. The drain outlet of the guide pipe 9 is provided with a reverse osmosis membrane (the reverse osmosis membrane is existing technology and can be purchased according to actual conditions) that allows water vapor to enter in one direction. In this embodiment, the water absorption expansion block 8 is made of sodium polyacrylate material and can be reused.

[0042] The sealing mechanism includes a piston rod 10, a compression spring 11, and a sealing ring 12. The piston rod 10 drives the sealing ring 12 to move, thereby preventing moisture from contacting the fixing bolt 5 from the bottom. One end of the piston rod 10 is connected to the piston cylinder 7, and the other end of the piston rod 10 passes through the piston cylinder 7 and is connected to the sealing ring 12. The compression spring 11 is sleeved on the piston rod 10. When the temperature rises and the moisture decreases (because there is no water source to continuously replenish the water-absorbing expansion block 8, the compression spring 11 will drive the piston rod 10 to continuously squeeze the water-absorbing expansion block 8 to reduce its volume, so that the liquid in the water-absorbing expansion block 8 enters the hydraulic push rod 16 through the one-way valve 14), the compression spring 11 is used to... The piston rod 10 is driven to reset. The two ends of the compression spring 11 are fixedly connected to the piston rod 10 and the side wall of the piston cylinder 7, respectively. The sealing ring 12 is set on the side wall of the threaded hole 601. The outer diameter of the sealing ring 12 is larger than the inner diameter of the threaded hole 601. When the water-absorbing expansion block 8 absorbs water and expands, it will push the piston rod 10 to move along the piston cylinder 7 and compress the compression spring 11, so that the sealing ring 12 is tightly attached to the connection between the fixing bolt 5 and the threaded hole 601, thereby ensuring the effectiveness of the seal. Since the outer diameter of the sealing ring 12 is larger than the inner diameter of the threaded hole 601, the sealing ring 12 will remain in the snap-fit ​​state when the piston rod 10 resets, and will not be driven to reset.

[0043] The adjustment chamber has a ratchet groove 13, which is connected to the threaded hole 601. The ratchet groove 13 is used to restrict the movement direction of the ratchet block 17, so that the ratchet block 17 can only move in one direction. The damping enhancement mechanism includes a one-way valve 14, a connecting pipe 15, a hydraulic push rod 16, a ratchet block 17, and a reinforcing block 18. The one-way valve 14 only allows liquid to flow into the connecting pipe 15 in one direction. The one-way valve 14 is connected to the piston cylinder 7. The one-way valve 14 is connected to the hydraulic push rod 16 through the connecting pipe 15. The movable end of the hydraulic push rod 16 is connected to the ratchet block 17. The ratchet block 17 is fixedly connected to the reinforcing block 18, which is made of rubber material.

[0044] The steel beam includes an upper end plate 19 and a lower end plate 20, which together form the steel beam. The upper end plate 19 and the lower end plate 20 are connected by connecting bolts 21. The upper end plate 19 has grouting holes 22 for grouting. After the steel beam is connected, grouting is performed inside the steel beam through the grouting holes 22 to improve the load-bearing capacity of the joint. Grouting improves the bending and shear strength of the steel beam, enabling the steel-concrete structure to withstand greater loads and external forces, especially under high load and vibration environments. Grouting inside the steel beam can effectively improve the seismic performance of the steel-concrete composite joint. The concrete not only enhances the structural rigidity of the steel beam, but also plays a role in damping and absorbing energy by filling the joint, which helps to prevent structural damage caused by vibration.

[0045] Working principle: Before use, the main body of the steel column 2 is fixed inside the concrete column 1. When installing the steel beam, the upper end plate 19 and the lower end plate 20 are first fixedly connected by connecting bolts 21. Then, the steel beam is connected to the connecting plate 3 by connecting angle iron 4. (After the connection is completed, the connection between the connecting angle iron 4 and the steel beam, and the connection between the connecting angle iron 4 and the connecting plate 3 can be further welded as needed to further increase the connection strength and seismic performance.) After the connection of the steel beam is completed, grouting is performed inside the steel beam through the grouting hole 22 to improve the load-bearing capacity of the joint.

[0046] During daily use, the water-absorbing expansion block 8 can absorb moisture around the fixing box 6. After absorbing moisture, the water-absorbing expansion block 8 expands, thereby pushing the piston rod 10 to move along the piston cylinder 7. When the piston rod 10 moves, the sealing ring 12 will be tightly attached to the connection between the fixing bolt 5 and the threaded hole 601. At this time, the compression spring 11 is compressed. When the ambient temperature rises, the moisture in the water-absorbing expansion block 8 is gradually evaporated. At this time, the volume of the water-absorbing expansion block 8 will decrease, thereby reducing the pushing force on the piston rod 10. When the temperature rises and the moisture decreases, since there is no water source to continuously replenish the water-absorbing expansion block 8, the compression spring 11 will drive the piston rod 10 to continuously squeeze the water-absorbing expansion block 8, thereby causing the liquid in the water-absorbing expansion block 8 to enter the hydraulic push rod 16 through the one-way valve 14. The hydraulic push rod 16 will push the ratchet block 17 to move along the ratchet groove 13, thereby driving the reinforcing block 18 to wrap around the fixing bolt 5, increasing the damping force on the fixing bolt 5, thereby preventing it from loosening.

[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.

Claims

1. A steel-concrete composite joint, characterized in that, include: A concrete column, wherein the concrete column is connected to a steel beam by a connecting assembly; The connecting assembly includes a support mechanism and a fixing mechanism, wherein the support mechanism is used to support the steel beam and the fixing mechanism is used to fix the steel beam. A humidity response component includes a water vapor adsorption mechanism, a sealing mechanism, and a damping enhancement mechanism. The water vapor adsorption mechanism is used to adsorb water vapor around the connection of the steel beam. After the water vapor adsorption mechanism absorbs water and expands, it will trigger the opening of the sealing mechanism and the damping enhancement mechanism. The sealing mechanism is used to seal the connection between the fixing mechanism and the steel beam. The damping enhancement mechanism is used to increase the damping force around the fixing mechanism. The support mechanism includes a steel column body, a connecting plate, and a connecting angle iron. The steel column body is fixedly connected to the concrete column, the connecting plate is fixedly connected to the steel column body, and a plurality of steel beams are connected around the connecting plate. A connecting angle iron is provided at the connection between the connecting plate and the steel beams. The fixing mechanism is used to connect the steel beams and the connecting angle iron. The fixing mechanism includes a fixing bolt and a fixing box. The fixing bolt is used to connect the connecting angle iron to the steel beam. The fixing box has a threaded hole, and one side of the fixing bolt is connected to the threaded hole. The fixed box is provided with an adjustment cavity, which is connected to the threaded hole. The water vapor adsorption mechanism includes a piston cylinder, a water absorption expansion block, and a guide pipe. The piston cylinder is disposed in the adjustment cavity, the water absorption expansion block is disposed in the piston cylinder, and the guide pipe is used to connect one side of the piston cylinder to the outside.

2. The steel-concrete composite joint according to claim 1, characterized in that: The water-absorbing and expanding block is made of sodium polyacrylate.

3. A steel-concrete composite joint according to claim 1, characterized in that: The sealing mechanism includes a piston rod, a compression spring, and a sealing ring. One end of the piston rod is connected to the piston cylinder, and the other end of the piston rod passes through the piston cylinder and is connected to the sealing ring. The compression spring is sleeved on the piston rod, and its two ends are respectively connected to the piston rod and the side wall of the piston cylinder. When the water-absorbing expansion block absorbs water and expands, it will push the piston rod to move along the piston cylinder and compress the compression spring, so that the sealing ring is tightly attached to the connection between the fixing bolt and the threaded hole.

4. A steel-concrete composite joint according to claim 3, characterized in that: The adjustment chamber is provided with a ratchet groove. The damping enhancement mechanism includes a one-way valve, a connecting pipe, a hydraulic push rod, a ratchet block, and a reinforcing block. The one-way valve is connected to the piston cylinder. The one-way valve is connected to the hydraulic push rod through the connecting pipe. The hydraulic push rod is connected to the ratchet block, and the ratchet block is connected to the reinforcing block.

5. A steel-concrete composite joint according to claim 1, characterized in that: The steel beam includes an upper end plate and a lower end plate, which together form the steel beam. The upper end plate and the lower end plate are connected by connecting bolts.

6. A steel-concrete composite joint according to claim 5, characterized in that: The upper end plate is provided with grouting holes.

7. A steel-concrete composite system, characterized in that: Includes the steel-concrete composite node as described in any one of claims 1-6.

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