A kind of steel structure joint for fabricated building

Abstract

The application relates to a kind of steel structure nodes for fabricated building, it includes steel column, steel beam, steel beam is fixedly connected with steel column;Further including energy dissipation component, energy dissipation component is set between steel column and steel beam;Energy dissipation component includes mild steel damper and connecting piece, connecting piece is fixedly connected with mild steel damper;Connecting piece is used to be fixedly connected with steel beam, steel column.In the application, when steel structure building is subjected to earthquake action, relative location will occur between steel column and steel beam, thereby driving mild steel damper to deform, so that mild steel damper will produce varying damping;Thus, part of seismic energy can be dissipated by the deformation of mild steel damper, reduce the damage of seismic energy to steel structure building node, to achieve the purpose of improving steel structure building safety and facilitating staff post-earthquake repair.

Description

Technical Field

[0001] This application relates to the field of building steel structure technology, and in particular to a steel structure node for prefabricated buildings. Background Technology

[0002] With the development of building structural systems, steel structures have received considerable attention due to their excellent mechanical properties and prefabricated characteristics.

[0003] The main load-bearing components of steel structure buildings consist of steel beams, steel columns, and connecting joints. Joints are the most crucial component, as their mechanical properties and energy dissipation capacity affect the stress state of the entire steel structure system. In existing technologies, the connection methods between steel columns and beams primarily employ welding or bolting.

[0004] The beam-column connections in steel structures bear the bending moments and shear forces transmitted from the beams and columns, resulting in relatively concentrated stress. When steel structures are subjected to earthquakes, these beam-column connections are prone to brittle failure due to the large stress, thus affecting the safety and post-earthquake repair of the steel structure. Summary of the Invention

[0005] In order to reduce the degree of damage to steel structure nodes in buildings and improve the safety of steel structure buildings, this application provides a steel structure node for prefabricated buildings.

[0006] This application provides a steel structure node for prefabricated buildings, employing the following technical solution: A steel structure node for prefabricated buildings includes steel columns and steel beams, with the steel beams fixedly connected to the steel columns; it also includes an energy-dissipating component disposed between the steel columns and the steel beams; the energy-dissipating component includes a soft steel damper and a connector, with the connector fixedly connected to the soft steel damper; the connector is used for fixed connection with the steel beams and steel columns.

[0007] By adopting the above technical solution, when a steel structure building is subjected to seismic loads, the steel columns and beams undergo relative displacement due to the overall structural deformation of the steel structure. This displacement causes the soft steel dampers to change shape. Soft steel dampers have advantages such as low yield strength and good ductility, allowing them to yield earlier than steel beams and columns in a steel structure. When the steel beams and columns cause the soft steel dampers to deform, the dampers generate varying damping. This deformation of the soft steel dampers dissipates some seismic energy, reducing damage to the joints of the steel structure, thereby improving the safety of the steel structure and facilitating post-earthquake repairs.

[0008] Optionally, the energy-dissipating component further includes a fixing member; the soft steel damper includes a first soft steel damper and a second soft steel damper, and the fixing member is fixed between the first soft steel damper and the second soft steel damper; the steel beam is connected to the first soft steel damper, and the steel column is fixedly connected to the second soft steel damper.

[0009] By adopting the above technical solution and setting the first and second soft steel dampers, the connection between the energy dissipation component and the steel column is made far away from the connection node between the steel beam and the steel column; thereby increasing the deformation degree of the energy dissipation component and further increasing the energy dissipation of the energy dissipation component for seismic energy.

[0010] Optionally, it also includes a connecting rod; at least two energy-dissipating components are provided, and the number of energy-dissipating components corresponds to the number of steel beams; the connecting rod is provided between adjacent fixing components, and the connecting rod is fixedly connected to the fixing component.

[0011] By adopting the above technical solution and setting a connecting rod between adjacent fixed parts, when the steel beam in a certain direction is subjected to a large seismic force, causing the steel beam and the steel column, as well as the soft steel damper located between the steel beam and the steel column, to undergo a large displacement, the fixed part with the large displacement will pull the adjacent fixed parts to move together through the connecting rod, so that the adjacent soft steel damper can also dissipate a part of the seismic energy.

[0012] Optionally, the soft steel damper is a U-shaped soft steel damper; the opening directions of both the first and second soft steel dampers are located in the radial direction of the steel column.

[0013] By adopting the above technical solution, since the U-shaped soft steel damper has an opening that is set along the length of the steel beam, the deformation degree of the soft steel damper can be further improved when the steel column and the steel beam rotate relative to each other, thereby further improving the seismic energy dissipated by the soft steel damper.

[0014] Optionally, the opening of the first soft steel damper is oriented away from the steel column, and the opening of the second soft steel damper is oriented towards the steel column.

[0015] By adopting the above technical solution, the opening directions of the first soft steel damper and the second soft steel damper are set opposite to each other; when the steel beam and the steel column rotate relative to each other, the soft steel damper can be forced to undergo large deformation, so as to further improve the energy dissipation component to consume the energy of the earthquake.

[0016] Optionally, the two ends of the soft steel damper are bent outwards, and the bent portions are connected to the fixing member.

[0017] By adopting the above technical solution, the U-shaped soft steel damper is connected to the fixing part through the bending part. When the fixing part causes the U-shaped soft steel damper to deform, the deformation of the U-shaped soft steel damper is large, which allows the U-shaped soft steel damper to dissipate more seismic energy and protect the steel structure nodes.

[0018] Optionally, it also includes an energy-consuming panel, which includes a first component and a second component, which are integrally formed; the first component is fixedly connected to the steel column, and the second component is fixedly connected to the steel beam; the second component has grooves on both sides of its middle section.

[0019] By adopting the above technical solution, grooves are opened on both sides of the middle of the second component, thereby creating a weakening zone in the middle of the second component. When the steel beam is subjected to a large seismic force and a plastic hinge appears, the plastic deformation at the connection node between the steel beam and the steel column is shifted outward, controlling the structural damage outside the node connection area, thus avoiding brittle fracture in the complex beam-column connection area.

[0020] Optionally, at least a portion of the energy-consuming components are disposed opposite to the groove of the energy-consuming plate.

[0021] By adopting the above technical solution, the steel beams located on both sides of the plastic hinge will rotate, which will cause the energy dissipation components to rotate downwards; thereby increasing the deformation degree of the soft steel damper and enabling the soft steel damper to dissipate more seismic energy.

[0022] Optionally, it may also include a shape memory alloy screw, which is used to connect the steel beam and the steel column.

[0023] By employing the aforementioned technical solution, when a steel structure is subjected to significant seismic forces, the hyperelastic characteristics of the shape memory alloy enable the shape memory alloy screw to possess a certain deformation capacity. The shape memory alloy screw elongates under the influence of large external forces, creating minute gaps between the steel beams and columns. This, in turn, increases the relative displacement between the steel beams and columns, allowing the energy-dissipating components fixedly connected to the steel beams and columns to dissipate more seismic energy, thereby reducing damage to the steel structure joints.

[0024] Optionally, the steel column has a flange and a web, and the steel column is also provided with a reinforcing plate, which is fixed between the flange and the web.

[0025] By adopting the above technical solution, the local stiffness of the steel column in the joint area is improved by reinforcing plate, thereby reducing the occurrence of plastic deformation of the steel column at the beam-column joint.

[0026] In summary, this application includes at least one of the following beneficial technical effects: When a steel structure building is subjected to an earthquake, the steel columns and beams will shift relative to each other, causing the soft steel dampers to deform and thus generate varying damping. The deformation of the soft steel dampers can dissipate some of the earthquake energy, reducing the damage to the joints of the steel structure building, thereby improving the safety of the steel structure building and facilitating post-earthquake repairs. By setting a connecting rod between adjacent fixed parts, when the steel beam in a certain direction is subjected to a large seismic force, the soft steel damper located between the steel beam and the steel column will cause the adjacent soft steel damper to deform together through the connecting rod, so that the energy dissipation component can dissipate more seismic energy. The U-shaped soft steel damper is connected to the fixing member through the bending part. When the fixing member causes the U-shaped soft steel damper to deform, the lever arm of the fixing member on the soft steel damper is large, which makes the deformation of the U-shaped soft steel damper more efficient. This allows the U-shaped soft steel damper to dissipate more seismic energy and protect the steel structure nodes. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the steel structure node in Example 1.

[0028] Figure 2 This is a top view illustrating the steel structure node structure in Example 1.

[0029] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0030] Figure 4 yes Figure 1 Enlarged view of section B in the middle.

[0031] Figure 5 This is a structural schematic diagram of the steel structure node in Example 2.

[0032] Explanation of reference numerals in the attached drawings: 1. Steel column; 2. Steel beam; 3. Shape memory alloy screw; 4. Energy dissipation component; 41. Soft steel damper; 411. First soft steel damper; 412. Second soft steel damper; 42. Connector; 43. Fixing component; 5. Angle steel component; 7. Connecting rod; 8. Bending part; 9. Energy dissipation plate; 91. First component; 92. Second component; 93. Groove; 10. Reinforcing plate. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a steel structure node for prefabricated buildings. (Refer to...) Figure 1 and Figure 2The steel structure node used in prefabricated buildings includes a steel column 1, a steel beam 2, a shape memory alloy screw 3, and an energy dissipation component 4. The steel beam 2 is fixedly connected to the steel column 1 via the shape memory alloy screw 3; the energy dissipation component 4 is located between the steel column 1 and the steel beam 2, and is fixedly connected to both the steel column 1 and the steel beam 2. The energy dissipation component 4 is used to dissipate seismic energy at the steel structure node.

[0035] In this embodiment, the steel column 1 is the central column, and there are four steel beams 2. The four steel beams 2 are fixedly connected to the steel column 1 on the same horizontal plane, and adjacent steel beams 2 are arranged perpendicularly. In this embodiment, the steel beam 2 includes two webs arranged in a cross shape and four flanges. The four flanges are arranged around the webs and are fixedly connected to the webs, with adjacent flanges arranged perpendicularly. The steel beam 2 is an I-beam.

[0036] The steel column 1 is also provided with a reinforcing plate 10, which is fixed between the flange and the web of the steel column 1. The reinforcing plate 10 improves the local stiffness of the steel column 1 in the node area and reduces the occurrence of plastic deformation of the steel column 1 at the beam-column node.

[0037] Reference Figure 1 and Figure 3 The steel structure node also includes an angle steel member 5, which is located at the angle between the web of the steel beam 2 and the flange of the steel column 1. One side of the angle steel member 5 abuts against the steel column 1, and the other side of the angle steel member 5 abuts against the steel beam 2. The angle steel member 5, the steel beam 2, and the steel column 1 are all provided with through holes for the shape memory alloy screw 3 to pass through. After the shape memory alloy screw 3 passes through the through holes of the angle steel and the steel beam 2, the two ends of the shape memory alloy are fixedly connected by high-strength nuts. After the shape memory alloy screw 3 passes through the through holes of the angle steel and the steel column 1, the two ends of the shape memory alloy are fixedly connected by high-strength nuts. Thus, the workers fix the steel beam 2 and the steel column 1 together by using the angle steel and the shape memory screw.

[0038] The steel column 1 and steel beam 2 are connected by shape memory alloy screws 3, allowing them to fit tightly together and facilitating the transfer of internal forces between them. When the steel structure is subjected to significant earthquake forces, the hyperelastic properties of the shape memory alloy enable the screws 3 to deform, thereby reducing damage to the steel beam 2 and steel column 1 at the joints.

[0039] Reference Figure 1 , Figure 2 and Figure 4The energy-dissipating component 4 is fixed between the steel beam 2 and the steel column 1, and the number of energy-dissipating components 4 corresponds to the number of steel beams 2. In this embodiment, there are four steel beams 2 and four energy-dissipating components 4; the energy-dissipating components 4 are located between the upper flange of the steel beam 2 and the steel column 1. The energy-dissipating component 4 includes a soft steel damper 41, a connector 42, and a fixing member 43. In this embodiment, the soft steel damper 41 includes a first soft steel damper 411 and a second soft steel damper 412. The fixing member 43 is fixed between the first soft steel damper 411 and the second soft steel damper 412; the connector 42 is connected to the first soft steel damper 411 and is fixedly connected to the upper flange of the steel beam 2; the end of the second soft steel damper 412 is fixedly connected to the steel column 1. The above-mentioned building component fixing connection method can be welding, bolt fixing connection, etc.; in this embodiment, the above-mentioned building component fixing connection method is bolt connection, so as to facilitate the installation by workers. It is worth noting that bolted connections are a well-known connection method among those skilled in the art, and the specific structure of bolted connections is not shown in the accompanying drawings of this application.

[0040] In this embodiment, the working principle of the energy-consuming component 4 is as follows: When a steel structure is subjected to seismic loads, the steel column 1 and steel beam 2 undergo relative displacement due to the overall structural deformation of the steel structure. This displacement causes the soft steel damper 41 to change shape. The soft steel damper 41 has advantages such as low yield strength and good ductility, allowing it to yield earlier than the steel beam 2 and steel column 1 in the steel structure. As the steel beam 2 and steel column 1 cause the soft steel damper 41 to deform, it generates varying damping. This deformation of the soft steel damper 41 dissipates some seismic energy, reducing damage to the joints of the steel structure.

[0041] When a steel structure is subjected to a significant earthquake, the hyperelastic properties of the shape memory alloy give the shape memory alloy screw 3 a certain deformation capacity. Under the influence of a large external force, the shape memory alloy screw 3 elongates, creating a small gap between the steel beam 2 and the steel column 1. This increases the relative displacement between the steel beam 2 and the steel column 1, allowing the energy-dissipating component 4, which is fixedly connected to the steel beam 2 and the steel column 1, to dissipate more seismic energy and reduce damage to the steel structure joints. After the seismic force dissipates, the shape memory alloy screw 3 automatically returns to its original shape, ensuring a tight connection between the steel beam 2 and the steel column 1 to transfer the internal forces of the steel structure.

[0042] In summary, through the synergistic cooperation of energy dissipation component 4 and shape memory alloy, the energy dissipation component 4 located at the steel structure node can dissipate more seismic energy, thereby reducing the damage to the steel column 1 and steel beam 2 at the node; thus achieving the purpose of improving the safety of steel structure buildings and facilitating post-earthquake repair by staff.

[0043] Reference Figure 4 In this embodiment, the soft steel damper 41 is a U-shaped soft steel damper 41. In other embodiments, the soft steel damper 41 can also be a triangular soft steel damper 41, a soft steel damper 41 for the steel column 1, or other forms of dampers. The relative displacement between the steel beam 2 and the steel column 1 is primarily a relative angular displacement. Because the U-shaped soft steel damper 41 has an opening, when the steel column 1 and the steel beam 2 rotate relative to each other, the deformation degree of the soft steel damper 41 can be further increased, thereby further increasing the seismic energy dissipated by the soft steel damper 41.

[0044] It is worth noting that since the relative rotation between the steel column 1 and the steel beam 2 is mostly on the same plane, in this embodiment, the opening directions of both the first soft steel damper 411 and the second soft steel damper 412 are located radially towards the steel column 1; and the opening of the first soft steel damper 411 is set away from the steel column 1, while the opening direction of the second soft steel damper 412 is set towards the steel column 1. Thus, by setting the opening direction of the soft steel damper 41, the deformation of the soft steel damper 41 is further increased, thereby increasing the amount of seismic energy dissipated by the soft steel damping.

[0045] When multiple steel beams 2 are fixedly connected to steel columns 1, the relative displacement between different steel beams 2 and steel columns 1 varies due to the randomness of the seismic action direction. When the seismic action acts along the length of the steel beam 2, the relative displacement between the steel beam 2 and steel column 1 is larger; conversely, the relative displacement between the steel beam 2 and steel column 1 is smaller. In order to maximize the dissipation effect of the energy-dissipating component 4 on seismic energy, this embodiment further improves the steel structure nodes.

[0046] Reference Figure 1 , Figure 2 and Figure 4 The steel structure node also includes four connecting rods 7. The four connecting rods 7 are respectively installed between adjacent fixing members 43, and are bolted to the fixing members 43. By installing connecting rods 7 between adjacent fixing members 43, when the steel beam 2 in a certain direction is subjected to a large seismic force, causing a large displacement of the steel beam 2 and the steel column 1, and the soft steel damper 41 located between the steel beam 2 and the steel column 1; the fixing member 43 with the larger displacement will pull the adjacent fixing member 43 to move together through the connecting rods 7, thereby allowing the adjacent soft steel damper 41 to dissipate some of the seismic energy. That is, by using connecting rods 7 between adjacent energy-dissipating components 4, the energy-dissipating components 4 can dissipate more seismic energy.

[0047] It is worth noting that in this embodiment, the two ends of the soft steel damper 41 are bent outwards with bends 8, which are bolted to the fixing member 43. One bend 8 of the second soft steel damper 412 is bolted to the steel column 1, and another bend 8 of the second soft steel damper 412 is fixedly connected to the connector 42. When the fixing member 43 causes the U-shaped soft steel damper 41 to deform, the lever arm of the fixing member 43 on the soft steel damper 41 is large, thereby increasing the deformation of the U-shaped soft steel damper 41. This allows the U-shaped soft steel damper 41 to dissipate more seismic energy, thus protecting the steel structure nodes. Example

[0048] The difference between Example 2 and Example 1 is as follows: Reference Figure 5 The steel structure node also includes an energy-dissipating plate 9, which is bolted between the lower flange of the steel beam 2 and the steel column 1. Specifically, the energy-dissipating plate 9 comprises an integrally formed first component 91 and a second component 92. The first component 91 is bolted to the flange of the steel column 1, and the second component 92 is bolted to the lower flange of the steel beam 2. Grooves 93 are formed on both sides of the middle of the second component 92, creating a weakening zone in the grooves 93. When the node of the steel structure rotates under load, the L-shaped energy-dissipating plate 9 bears tensile and compressive forces. By creating grooves 93 on both sides of the middle of the second component 92, a weakening zone is formed in the middle of the second component 92. When the steel beam 2 is subjected to a large seismic force and a plastic hinge appears, the plastic deformation of the steel beam 2 occurs more frequently in areas far from the edge of the steel beam 2, resulting in the plastic hinge of the steel beam 2 appearing in a weakening zone at a certain distance from the beam-column node.

[0049] In summary, this embodiment further reduces damage to steel structure nodes by setting up energy-dissipating plates 9, thereby improving the safety of steel structure buildings and facilitating post-earthquake repair of steel structure nodes by staff.

[0050] Meanwhile, in this embodiment, the energy-dissipating component 4 covers the groove 93 of the energy-dissipating plate 9. In this embodiment, the groove 93 is an arc-shaped groove 93. When the steel beam 2 is in the groove 93 of the energy-dissipating plate 9, the steel beam 2 located on both sides of the plastic hinge will rotate; the plastic hinge will move downward. The energy-dissipating component 4 can cover the groove 93 of the energy-dissipating plate 9, so that the steel beam 2 can drive the energy-dissipating component 4 to rotate downward; thereby increasing the deformation degree of the soft steel damper 41, so that the soft steel damper 41 can dissipate more seismic energy and reduce further damage to the steel structure nodes of the building caused by seismic energy.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel structure node for prefabricated buildings, characterized in that: The system includes a steel column (1) and a steel beam (2), the steel beam (2) being fixedly connected to the steel column (1); it also includes an energy dissipation component (4), the energy dissipation component (4) being disposed between the steel column (1) and the steel beam (2); the energy dissipation component (4) includes a soft steel damper (41) and a connector (42), the connector (42) being fixedly connected to the soft steel damper (41); the connector (42) is used to fixably connect to the steel beam (2) and the steel column (1); the energy dissipation component (4) also includes a fixing component (43); the soft steel damper (41) includes a first soft steel damper (411) and a second soft steel damper (412), the fixing component (43) being fixed to the first soft steel damper (411) and the second soft steel damper (412). Between; the steel beam (2) is connected to the first soft steel damper (411), and the steel column (1) is fixedly connected to the second soft steel damper (412); it also includes a connecting rod (7), at least two energy dissipation components (4) are provided, and the number of energy dissipation components (4) corresponds to the number of steel beams (2); the connecting rod (7) is provided between adjacent fixing parts (43), and the connecting rod (7) is fixedly connected to the fixing parts (43); the soft steel damper (41) is a U-shaped soft steel damper (41); the opening direction of the first soft steel damper (411) and the second soft steel damper (412) is located in the radial direction of the steel column (1); the opening of the first soft steel damper (411) is set away from the steel column (1), and the opening direction of the second soft steel damper (412) is set towards the steel column (1).

2. The steel structure node for prefabricated buildings according to claim 1, characterized in that: The soft steel damper (41) has two ends bent outward with bending portions (8), and the bending portions (8) are connected to the fixing member (43).

3. The steel structure node for prefabricated buildings according to claim 1, characterized in that: It also includes an energy-consuming plate (9), which includes a first component (91) and a second component (92). The first component (91) and the second component (92) are integrally formed. The first component (91) is fixedly connected to the steel column (1), and the second component (92) is fixedly connected to the steel beam (2). The second component (92) has grooves (93) on both sides of the middle part.

4. The steel structure node for prefabricated buildings according to claim 3, characterized in that: At least a portion of the energy-consuming component (4) is disposed opposite to the groove (93) of the energy-consuming plate (9).

5. The steel structure node for prefabricated buildings according to claim 1, characterized in that: It also includes a shape memory alloy screw (3), which is used to connect the steel beam (2) and the steel column (1).

6. The steel structure node for prefabricated buildings according to claim 1, characterized in that: The steel column (1) has a flange and a web, and the steel column (1) is also provided with a reinforcing plate (10), which is fixed between the flange and the web.

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