Composite energy dissipation self-resetting steel frame connecting joint and steel frame

Abstract

The invention provides a composite energy dissipation self-resetting steel frame connecting joint and a steel frame, belongs to the technical field of assembly type steel structures, and aims at solving the technical problems that a traditional steel frame is large in residual deformation after an earthquake, difficult to maintain and multiple in potential safety hazards. Comprising a steel frame column, a steel frame beam, a self-resetting sliding energy dissipation mechanism and a self-resetting rotating energy dissipation mechanism. The self-resetting sliding energy dissipation mechanism is connected between the steel frame column and the side face of the end of the steel frame beam and can absorb energy through stretching and retracting, and the self-resetting sliding energy dissipation mechanism is arranged between the steel frame column and the upper side face and / or the lower side face of the end of the steel frame beam. The self-resetting rotating energy dissipation mechanism is connected between the steel frame column and the end face of the end of the steel frame beam and can absorb energy through rotation. And the technical effects of good self-resetting and energy consumption during an earthquake, improvement of structural rigidity stability and reduction of post-earthquake maintenance cost and period are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled steel structures, and in particular to a composite energy dissipation self-resetting steel frame connection node and a steel frame. Background Art

[0002] As a widely used structural form in modern architecture, the steel frame system offers advantages such as convenient construction and flexible spatial layout. The steel frame system, formed by connecting steel beams and columns, plays a vital role in the load-bearing function of the building structure and is widely used in various industrial and civil buildings.

[0003] Traditional steel frame structures employ ductile seismic design methods, such as strong columns and weak beams and plastic hinge mechanisms. While these methods can dissipate earthquake energy through plastic deformation at joints, they can also lead to irreversible residual deformation in the structure. This permanent damage can reduce the structural performance and create safety hazards. Post-earthquake repairs are also costly and time-consuming. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention proposes a composite energy dissipation self-resetting steel frame connection node and steel frame, which are used to solve the technical problems of traditional steel frames such as large residual deformation after earthquakes, difficult maintenance and many safety hazards.

[0005] The technical solution adopted by the present invention is a composite energy dissipation self-resetting steel frame connection node and a steel frame.

[0006] Among them, a composite energy dissipation self-resetting steel frame connection node includes: Steel frame columns, steel frame beams, self-resetting sliding energy dissipation mechanisms and self-resetting rotating energy dissipation mechanisms; The self-resetting sliding energy dissipation mechanism is connected between the side surfaces of the steel frame column and the end of the steel frame beam, and is capable of absorbing energy by expansion and contraction; The self-resetting rotation energy dissipation mechanism is connected between the steel frame column and the end surface of the steel frame beam end, and can absorb energy through rotation.

[0007] Optionally, the self-resetting sliding energy dissipation mechanism includes a first connecting structure, a sliding energy dissipation body and a second connecting structure; the sliding energy dissipation body includes a first friction pressure head, an anti-pressure ring structure, a second friction pressure head and a connecting piece; the first friction pressure head is provided with a conical hole, and the head end of the connecting piece passes through the first friction pressure head and the anti-pressure ring structure and is connected to the second friction pressure head as a whole; the first connecting structure and the second connecting structure are provided at both ends of the sliding energy dissipation body and are respectively connected to the steel frame column and the steel frame beam, and at least one of the ends is hinged; when the sliding energy dissipation body is subjected to tension, the tail end of the connecting piece is squeezed by the hole wall of the first friction pressure head and absorbs energy, and when the sliding energy dissipation body is subjected to pressure, the two ends of the anti-pressure ring structure are squeezed by the first friction pressure head and the second friction pressure head and absorb energy.

[0008] Optionally, the hole of the first friction press head is a tapered hole, and the diameter gradually decreases along the passing direction of the connecting piece; the tail end of the connecting piece is also tapered and the taper direction is consistent with the tapered hole of the first friction press head.

[0009] Optionally, the tail end tapered portion of the connecting piece is provided with an open groove, and the open groove divides the tapered portion into at least two sections with a gap.

[0010] Optionally, the open groove is filled with a viscoelastic material, and / or the tapered portion of the connector is made of mild steel, or a viscoelastic material, or a superelastic material.

[0011] Optionally, the anti-compression ring structure includes an energy dissipation ring and an extrusion ring that are spaced apart. The outer ring region of the extrusion ring is a wedge-shaped structure, and the wedge-shaped structure is axially embedded in the energy dissipation ring.

[0012] Optionally, the energy dissipation ring is made of superelastic material.

[0013] Optionally, the self-resetting rotation energy dissipation mechanism includes a first connecting plate, a rotation energy dissipation body and a second connecting plate; the rotation energy dissipation body includes a first wedge ring and a second wedge ring that are circumferentially wedge-shaped and embedded in each other, the back side of the first wedge ring is fixedly connected to the first connecting plate, and the back side of the second wedge ring is provided with a limit rod, and the limit rod slides through the second connecting plate; the first connecting plate, the rotation energy dissipation body and the second connecting plate are locked by a locking rod, and a disc spring is provided between the second connecting plate and the second wedge ring.

[0014] Optionally, the wedge-shaped chimeric body of the first wedge-shaped ring and / or the second wedge-shaped ring is made of superelastic material.

[0015] Among them, a composite energy dissipation self-resetting steel frame includes at least one composite energy dissipation self-resetting steel frame connection node and a steel frame as described above.

[0016] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows: This solution effectively addresses the significant residual deformation, difficult maintenance, and numerous safety hazards associated with traditional steel frames after earthquakes. By incorporating a self-resetting sliding energy dissipation mechanism and a self-resetting rotating energy dissipation mechanism, which absorb energy during an earthquake by expanding and contracting and rotating, respectively, the structure possesses excellent self-resetting and energy-dissipating properties. This not only improves overall structural rigidity and stability, but also significantly reduces post-earthquake repair costs, shortens maintenance cycles, and ensures structural safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the steel frame as a whole.

[0019] Figure 2 Schematic diagram of steel frame beam.

[0020] Figure 3 Schematic diagram of steel frame column.

[0021] Figure 4 Schematic diagram of the self-resetting sliding energy dissipation mechanism.

[0022] Figure 5 Schematic diagram of the sliding energy dissipation body.

[0023] Figure 6 Schematic diagram of the compression ring structure.

[0024] Figure 7 Schematic diagram of the self-resetting rotating energy dissipation mechanism.

[0025] Figure 8 Schematic diagram of the rotating energy dissipation body.

[0026] Figure 9 Schematic diagram of the locking rod and disc spring.

[0027] Figure markings: steel frame column 4, steel frame beam 1, self-resetting sliding energy dissipation mechanism 2, first connecting structure 203, branch 2014, first friction pressure head 2015, compression ring structure 202, energy dissipation ring 2022, extrusion ring 2021, second friction pressure head 2012, connecting piece 2013, second connecting structure 2011, self-resetting rotation energy dissipation mechanism 3, first connecting plate 302, first wedge ring 301, second wedge ring 303, limiting rod 3031, second connecting plate 401, locking rod 305, disc spring 304. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] In existing technologies, traditional steel frame structures absorb seismic energy during earthquakes primarily through plastic deformation at beam-column connection points. While traditional ductile seismic design methods (such as strong-column-weak-beam and plastic hinge mechanisms) can dissipate energy, they cannot avoid residual deformation. The resulting permanent structural damage leads to a decline in structural serviceability, posing a serious safety hazard. Furthermore, post-earthquake repairs are costly and time-consuming. Therefore, the development of structural systems with post-earthquake recovery capabilities is essential. Self-resetting structures do not experience permanent plastic deformation during earthquakes and can continue to function normally after an earthquake. Incorporating self-resetting energy dissipation devices into steel structural systems not only enables the structure's self-resetting function but also ensures sufficient energy dissipation performance, overcoming the shortcomings of most steel frame structural systems, which lack a balance between self-resetting performance and energy dissipation capacity.

[0031] Based on this, this solution provides a composite energy dissipation self-resetting steel frame connection node, please refer to the attached Figure 1 , a possible implementation is as follows, including: Steel frame columns 4, steel frame beams 1, self-resetting sliding energy dissipation mechanism 2 and self-resetting rotating energy dissipation mechanism 3. Steel frame columns 4 are usually arranged vertically (including inclined or vertical), and steel frame beams 1 are generally arranged horizontally and connected between vertical steel frame columns 4. The same steel frame column 4 can be connected to steel frame beams 1 in different directions and at different heights as needed to enhance the integrity of the structure. Common cross-sectional shapes of steel frame columns 4 and steel frame beams 1 include I-section steel sections, which can efficiently withstand bending moments; I-section sections, which are simple in structure and economical in materials; in addition, rectangular steel tube sections are also commonly used, with good local stability and bending stiffness, which can meet the needs of different engineering scenarios; See attached Figure 2 and attached Figure 3 , the steel frame column 4 and the steel frame beam 1 both use I-steel, and the self-resetting sliding energy dissipation mechanism 2 is connected between the side surfaces of the steel frame column 4 and the end of the steel frame beam 1, and can absorb energy through expansion and contraction. The expansion and contraction here is caused by the relative sliding of the components inside the self-resetting sliding energy dissipation mechanism 2. In order to increase the stability of the structure, a reinforcing plate 101 can be provided at the connection between the steel frame column 4 and the steel frame beam 1, and an end plate 102 can be used to block the end of the steel frame beam 1 to facilitate the connection. The self-resetting sliding energy dissipation mechanism 2 is provided between the upper side surface and / or lower side surface of the steel frame column 4 and the end surface of the steel frame beam 1. As Figure 1 This is a case where both the upper and lower sides are connected to the self-resetting sliding energy dissipation mechanism 2. In actual implementation, the self-resetting sliding energy dissipation mechanism 2 may be provided only on the upper side or only on the lower side based on the actual load-bearing requirements of the structure, but the core concept remains within the scope of this solution. The self-resetting rotation energy dissipation mechanism 3 is connected between the steel frame column 4 and the end surface of the steel frame beam 1 and can absorb energy by rotation. The rotation here refers to the mutual rotation of the components inside the self-resetting rotation energy dissipation mechanism 3.

[0032] Specifically, see the attached Figure 4 and Figure 5The self-resetting sliding energy dissipation mechanism 2 includes a first connecting structure 203, a sliding energy dissipation body, and a second connecting structure 2011; the sliding energy dissipation body includes a first friction pressure head 2015, a pressure-resistant ring structure 202, a second friction pressure head 2012, and a connecting piece 2013; the first friction pressure head 2015 is provided with a tapered hole, and a cover can be provided at the end of the hole to make it a non-through end face for connecting to the first connecting structure 203, (the cover can also be omitted, but the first connecting structure 203 can only be connected along the outer periphery of the first friction pressure head 2015 to avoid the end of the hole). In one possible embodiment, a protrusion facing the tapered hole is provided on the cover, and a thread is provided on the outer periphery of the protrusion, and a thread is also provided at the tail end of the tapered hole, and the two cooperate to achieve a fixed connection between the cover and the first friction pressure head 2015; in another alternative, the cover is directly welded to the first friction pressure head 2015. After the head end of the connector 2013 passes through the first friction press 2015 and the anti-compression ring structure 202, it is integrally connected to the second friction press 2012. The self-resetting sliding energy dissipation mechanism 2 has the characteristics of tension and compression anisotropy. The anti-compression ring structure 202 has a high elastic coefficient, which can shorten its deformation and absorb energy when under pressure, and restore its shape after the force is reduced. In one possible embodiment, the connector 2013 is provided with an external thread, and the second friction press 2012 is provided with an internal threaded hole, and the two are screwed together. And it is possible to adjust the position of the second friction pressure head 2012 on the connecting piece 2013 by turning the number of circles, thereby adjusting the initial installation distance between the first friction pressure head 2015 and the second friction pressure head 2012, thereby adjusting the initial preload of the compression ring structure 202 to meet the needs of different energy consumption scenarios; the first connection structure 203 and the second connection structure 2011 are arranged at both ends of the sliding energy dissipation body and are respectively connected to the steel frame column 4 and the steel frame beam 1, and at least one of the ends is hinged, for example, the second connection structure 2011 end is hinged to the steel frame column 4, the second connection structure 2011 can be set as a hinge head, and a hinge seat 402 is correspondingly provided on the steel frame column 4 to cooperate with the hinge head of the second connection structure 2011, such as Figure 2 shown.

[0033] See Figure 1 The first connection structure 203 is provided at one end of the first friction pressure head 2015 , and the two ends of the first connection structure 203 are fixedly connected to the first friction pressure head 2015 and the steel frame beam 1 respectively.

[0034] In some possible embodiments, the first friction press 2015 is provided with an anchor head, and the first connection structure 203 includes a plurality of steel cables. One end of the steel cable is first anchored to the anchor head of the first friction press 2015, and then the other end passes through the buckle structure on the steel frame beam 1, and then reverses to the anchor head of the first friction press 2015 in a U-shape and is anchored again. The initial tensioning force can be adjusted as needed. For example, after the end of the steel cable is pulled to a suitable stress level using a tensile testing machine, it is anchored by the anchor head. Then, a structural rod, such as a steel pipe or a steel section, is axially welded between the first friction press 2015 and the steel frame beam 1. Finally, the tensile testing machine is slowly unloaded and removed. In the above process, the anchor head and the tensile testing machine are both commonly used equipment in the relevant field and can be selected as needed. In some cases, it is also possible to use structural rods for connection instead of steel cables. When the hinged structure needs to be arranged on the side of the first friction press head 2015, an adapter plate can be set at the end of the structural member (refer to the end plate 102 at the end of the steel frame beam 1), and a hinge seat can be set outside the adapter plate to connect with the steel frame beam 1.

[0035] In the above embodiment, when the sliding energy dissipation body is subjected to tension, the tail end of the connecting member 2013 is squeezed by the hole wall of the first friction pressure head 2015 and absorbs energy. When the sliding energy dissipation body is subjected to pressure, the two ends of the compression ring structure 202 are squeezed by the first friction pressure head 2015 and the second friction pressure head 2012 and absorb energy.

[0036] In one possible implementation, see the attached Figure 5 The hole in the first friction press 2015 is tapered, with its diameter gradually decreasing as the connector 2013 passes through it. The tail end of the connector 2013 is also tapered, with the taper direction aligned with the tapered hole in the first friction press 2015. The tapered portion of the tail end of the connector 2013 is provided with an open slot, which divides the tapered portion into at least two sections 2014 with a gap. In a preferred embodiment, the open slot can be arranged in a cross shape, dividing the tapered tail end of the connector 2013 into four sections 2014, with a circular hole at the center. The open slot (including the circular hole) is filled with a viscoelastic material, and the tapered portion of the connector 2013 is made of mild steel, a viscoelastic material, or a superelastic material.

[0037] In some possible embodiments, a cover is provided at the tail end of the hole of the first friction press 2015 for connecting to the first connecting structure 203. The depth of the tapered hole of the first friction press 2015 is greater than the length of the expansion section at the end of the connector 2013 on the inner part of the cover, and a viscoelastic material is filled at the bottom of the hole (between the cover and the tail end of the connector 2013). Then, when the tail end of the connector 2013 retreats from the small diameter part to the large diameter part in the tapered hole of the first friction press 2015, the end of the connector 2013 can squeeze the viscoelastic filling material in the hole, thereby increasing energy consumption.

[0038] In the above-mentioned embodiments, viscoelastic materials possess both viscous and elastic properties, capable of deforming and recovering with load changes. Common types include: rubbers, such as natural rubber, which exhibits excellent elasticity and wear resistance; silicone rubber, which is resistant to high and low temperatures and provides excellent insulation; polymers, such as polyisoprene, which offers good processability and elasticity; and polyurethane, which offers a wide range of hardness and is wear-resistant and oil-resistant. Viscoelastic materials exhibit stress relaxation, which reduces stress over time; creep, which increases deformation over time under constant stress; and damping, which absorbs vibration energy and reduces structural vibration.

[0039] In the above embodiment, mild steel is low-carbon steel with a carbon content of 0.15% to 0.30% and a manganese content of no more than 0.75%. It has low hardness and strength, but good plasticity and toughness, and excellent formability and weldability. A common example is No. 20 steel, which can be manufactured into the connector 2013 through processes such as rolling.

[0040] In the above-mentioned embodiments, superelastic materials are materials that can produce extremely large recoverable strains under stress and exhibit virtually no residual deformation after unloading. Their stress-strain relationship is highly nonlinear. There are many types of materials, including metals such as nickel-titanium alloys (such as NiTi and NiTiCu) and high-entropy alloys. In terms of performance, nickel-titanium alloys rely on martensitic transformations, while high-entropy alloys achieve high performance through the synergy of functional and structural elements. Both exhibit superelastic properties.

[0041] In one possible implementation, see the attached Figure 6 The anti-compression ring structure 202 includes an energy dissipation ring 2022 and an extrusion ring 2021 arranged at intervals. The outer ring area of ​​the extrusion ring 2021 is a wedge-shaped structure (at the same time, the inner ring area of ​​the energy dissipation ring 2022 can also be set to a matching wedge-shaped structure). For example, an oblique slope or arc surface guide structure can be set on both sides. The wedge-shaped structure is axially embedded in the energy dissipation ring 2022. The inner ring surface of the energy dissipation ring 2022 contacts the guide structure of the wedge structure and forms an interaction force. The energy dissipation ring 2022 is also made of superelastic material. When the anti-compression ring structure 202 is axially compressed, the extrusion ring 2021 can be squeezed into the inside of the energy dissipation ring 2022. The wedge-shaped structure in the outer ring area of ​​the extrusion ring 2021 has a guiding function. The energy dissipation ring 2022 is squeezed by the extrusion ring 2021 and elastically deforms, thereby absorbing energy. The number of layers of the energy dissipation ring 2022 and the extrusion ring 2021 can be set as needed. Different numbers of layers correspond to different initial lengths and elastic ranges. The more layers, the longer the initial length and the stronger the elastic energy absorption capacity. The energy dissipation ring 2022 is made of superelastic material.

[0042] In one possible implementation, see the attached Figure 7-9The self-resetting rotation energy dissipation mechanism 3 includes a first connecting plate 302 (whose flat side is fixedly connected to the steel frame beam end plate 102), a rotation energy dissipation body and a second connecting plate 401 (connected to the steel frame column 4, the second connecting plate 401 can be set as a hinge seat, such as Figure 3 ); The rotational energy dissipation body includes a first wedge ring 301 and a second wedge ring 303 that are circumferentially wedge-shaped and interlocked with each other. The back side of the first wedge ring 301 is fixedly connected to the first connecting plate 302 (the two can be processed as an integrated whole). A limiting rod 3031 is provided on the back side of the second wedge ring 303. The limiting rod 3031 slides through the second connecting plate 401. The limiting rod 3031 serves to limit the rotation of the second wedge ring 303 following the first wedge ring 301, but does not limit the axial movement ability of the two. The first connecting plate 302, the rotational energy dissipation body and the second connecting plate 401 are locked by a locking rod 305. The first connecting plate 302 and the second connecting plate 401 form a hinge relationship, but because there is a wedge ring between the two, it is actually an energy dissipation hinge, and a disc spring 304 is provided between the second connecting plate 401 and the second wedge ring 303. The wedge-shaped interlocking bodies of the first wedge ring 301 and / or the second wedge ring 303 are made of a metal material, in particular, may be made of a superelastic material.

[0043] In the above embodiment, the main working process of the composite energy dissipation self-resetting steel frame structure system is as follows: The structural system consists of a steel frame beam 1, a steel frame column 4, a self-resetting sliding energy dissipation mechanism 2 and a self-resetting rotating energy dissipation mechanism 3. Its core function is to improve the seismic performance of the structure through coordinated energy consumption and self-resetting mechanism. The upper and lower sides of the steel frame beam 1 can be connected to the steel frame column 4 through the self-resetting sliding energy dissipation mechanism 2.

[0044] When steel frame beam 1 is subjected to bending moment, its end rotates relative to steel frame column 4. For example, clockwise rotation causes tension on the upper self-resetting sliding energy dissipation mechanism 2, pulling the tail end of connector 2013 into the smaller diameter portion of the tapered hole of the first friction indenter 2015. Upon contact, the tapered end of connector 2013 and the tapered hole engage in compression and friction, causing the main body of the tapered portion to elastically deform, the open slot to close, and the viscoelastic material within the slot to compress and deform. The energy dissipation mechanisms involved in this process include: 1) frictional energy dissipation due to compression between the tapered end of connector 2013 and the tapered hole of the first friction indenter 2015; 2) elastic energy dissipation due to elastic deformation of the tapered end of connector 2013 (the hyperelastic material); and 3) compressive energy dissipation due to the closing of the open slot. These three mechanisms work together to achieve efficient energy dissipation.

[0045] At the same time, the lower self-resetting sliding energy dissipation mechanism 2 is subjected to pressure, causing the tail end of the connector 2013 to reversely withdraw from the small-diameter portion of the tapered hole of the first friction ram 215, breaking away from mutual contact and friction. The tapered tail of the connector 2013 is free of force and deformation. If the tail end of the tapered hole is capped and filled with viscoelastic material, the connector 2013 will also squeeze the filling material and dissipate energy during its retraction. The first friction ram 215 and the second friction ram 212 move toward each other, squeezing the anti-compression ring structure 202. The extrusion ring 2021 (with a wedge-shaped outer circumference) is axially pressed into the energy dissipation ring 2022. The wedge-shaped surface of the extrusion ring 2021 forces the energy dissipation ring 2022 to expand and deform radially (the hyperelastic material stretches), and sliding friction is generated at the contact surface between the extrusion ring 221 and the energy dissipation ring 2022. During the above process, the energy dissipation mechanism includes: ① radial expansion and deformation of the energy dissipation ring 2022; ② sliding friction between the contact surface of the extrusion ring 2021 and the energy dissipation ring 2022; and ③ energy consumption due to extrusion of the filling material during the retraction of the connecting member 2013.

[0046] At the same time, the working states of the self-resetting sliding energy dissipation mechanism 2 on the upper and lower sides of the steel frame beam 1 are always in opposite states, that is, one side is under tension and the other side is under compression. The bilateral mechanism decomposes the bending moment into tensile and compressive loads along the axial direction of the self-resetting sliding energy dissipation mechanism 2, synchronously triggering multiple energy dissipation mechanisms of friction, material deformation, and viscoelastic damping, significantly improving the energy dissipation efficiency of the node. After unloading, the superelastic recovery of the tension-side connector 2013 and the radial superelastic contraction of the compression-side energy dissipation ring 2022 form an opposing torque, which synergistically drives the beam end to rotate, significantly reducing the residual rotation angle. The restoring forces on both sides jointly push the steel frame beam 1 back to its original position, reducing the residual rotation angle.

[0047] During the whole process, the self-resetting rotating energy dissipation mechanism 3 also carries out the process of absorbing and dissipating energy. Specifically, it includes the following stages: During the initial normal load, when there is no bending moment or it is very small, the locking rod 305 transmits the force between the first connecting plate 302 (steel frame beam 1) and the second connecting plate 401 (steel frame column 4). The wedge teeth of the first wedge ring 301 and the second wedge ring 303 are fully engaged, the disc spring 304 is uncompressed or in its initial preloaded state, and the rotating energy dissipation body is not involved or is in a rigid state. Under seismic loads, the steel frame beam 1 is subjected to torque-induced relative rotation: the first wedge ring 301 (attached to the first connecting plate 302) rotates with the beam, while the second wedge ring 303, which is attached to the second connecting plate 401, is fixed to the steel frame column 4 and cannot rotate. The wedge teeth of the second wedge ring 303 and the first wedge ring 301 shift, forcing the second wedge ring 303 to move axially along the locking rod 305 (the limit rod 3031 guides and restricts rotation), generating friction and misalignment. At the same time, the second wedge ring 303 and the first wedge ring 301 become thicker in the axial direction, and the disc spring 304 is compressed to provide a counterforce. After unloading, the elastic restoring force of the disc spring 304 pushes the second wedge ring 303 back to its original position, and the wedge teeth re-engage, and the node returns to its initial angle (residual deformation approaches zero).

[0048] In the above process, the energy dissipation mechanism includes: ① relative sliding friction energy consumption between the wedge-shaped contact surfaces of the first wedge ring 301 and the second wedge ring 303; ② the second wedge ring 303 squeezes the disc spring 304, and the spring deforms and consumes energy; ③ the elastic deformation of the superelastic wedge ring absorbs energy.

[0049] In summary, this composite energy-dissipating, self-resetting steel frame node utilizes a sliding mechanism (on both sides) in synergistic operation with a rotating mechanism. When steel frame beam 1 is bent and rotated, the upper sliding mechanism is subjected to tension (conical friction, hyperelastic deformation, and viscoelastic energy dissipation), while the lower sliding mechanism is subjected to compression (hyperelastic stretching of energy dissipation ring 2022 and contact friction), forming a self-resetting moment on both sides. This simultaneously triggers the wedge-shaped teeth of the rotating mechanism to shift, dissipating energy through a triple combination of wedge-shaped friction, disc spring 304 compression, and hyperelastic ring deformation. These three elements form a progressive energy dissipation defense line, achieving synergistic energy dissipation through friction, material deformation, and mechanical elements. Relying on the hyperelastic material and disc springs, the node achieves self-reset with a near-zero residual rotation angle, significantly enhancing its seismic resilience.

[0050] Among them, a composite energy dissipation self-resetting steel frame, a possible implementation method is as follows, including at least one composite energy dissipation self-resetting steel frame connection node as above. The bottom of the frame column and the foundation can be connected by using this composite self-resetting energy dissipation node, or can be designed separately according to specific needs. The steel frame structure system is connected by a self-resetting sliding energy dissipation mechanism 2 and a self-resetting rotating energy dissipation mechanism 3, which not only enables the frame beams and frame columns to deform in a coordinated manner, but also enables the inelastic deformation of the steel frame under an earthquake to be concentrated on the provided energy dissipation device, which not only realizes that the structure has sufficient energy dissipation capacity and self-resetting performance under an earthquake, but also improves the stability and safety redundancy of the overall structure, effectively reducing the cost of post-earthquake repair of the structure.

[0051] In the above embodiment, the assembly method of the device includes the following steps: The frame beam 1, the second connecting structure 2011, the second friction press 2012, the connecting piece 2013, the first friction press 2015, the extrusion ring 2021 and the energy dissipation ring 2022, the first connecting structure 203, the first wedge ring 301 and the first connecting plate 302 are all produced in a standardized manner in the factory; the second wedge ring 303, the limit rod 3031, the disc spring 304, the locking rod 305, the frame column 4 and its second connecting plate 401 and the hinge seat 402 are all produced in a standardized manner; The second connecting plate 401 and the hinge seat 402 are welded to the corresponding position of the steel frame column 4, and the second connecting structure 2011 and the second friction press head 2012 are welded into one; Fill the slit of the connecting piece 2013 with a viscoelastic energy-absorbing material, and pass the connecting piece 2013 through the first friction press 2015 from the unsealed large open end of the tapered hole of the first friction press 2015. After the large open end of the tapered hole is filled with the viscoelastic energy-absorbing material, the large open end of the tapered hole of the first friction press 2015 is sealed by welding or threading; the extrusion ring 2021 and the energy dissipation ring 2022 are connected to the connecting piece 2013 in series, and the second friction press 2012 and the connecting piece 2013 are tightened by threads, and a certain pre-tightening force is applied; Weld the first connecting structure 203 to the first friction head 2015 cover plate, and connect the other inclined end of the first connecting structure 203 to the frame beam 1; The straight end of the first connecting plate 302 is welded to the steel frame beam end plate 102, the wedge-shaped openings of the first wedge ring 301 and the second wedge ring 303 are aligned and connected, and a locking rod 305 is passed through the second connecting plate 401, the disc spring 304, the second wedge ring 303, the first wedge ring 301, and the first connecting plate 302. The other end of the locking rod 305 is tightened with a thread, preferably with the nut loosened; at the same time, a limiting rod 3031 is passed through the second connecting plate 401, and then the limiting rod and the second wedge ring 303 are connected to each other by threads or welding. The self-resetting sliding energy dissipation mechanism 2 is connected to the second connecting plate 401 of the steel frame column 4 through the second connecting structure 2011 .

[0052] The innovation of this assembly process is mainly reflected in the transformation of complex functions into a simple and efficient process chain: the innovative use of the "reverse filling + dynamic sealing" process solves the problem of energy-consuming material packaging - first, the open-slit connector passes through the conical hole of the first friction pressure head, and then the viscoelastic material is reversely filled from its large open end and welded closed, which not only ensures the material filling degree but also avoids assembly damage; the innovative friction pair preload synchronous application mechanism directly forms the contact pressure of the extrusion ring and the energy dissipation ring when the second friction pressure head and the connector are tightened by threads, eliminating the need for an independent pressurization process; the wedge-shaped reset mechanism The integrated locking technology uses a single locking rod that penetrates the column plate, disc spring, double wedge ring, and beam connecting plate to achieve overall pre-compression of the reset unit. Simultaneously, the fixed connection design of the limit rod and the second wedge ring simultaneously completes the construction of the displacement constraint system during assembly. Through the "core module factory prefabrication - functional unit on-site integration" strategy, such as welded hinge head-friction head assembly, pre-filled connector modules and other standardized components, combined with the precise combination of on-site thread tightening and key welding, multiple functions such as composite energy dissipation, self-reset, and limit are efficiently integrated through simple assembly line operations. This process design avoids the cumbersome assembly logic of traditional seismic nodes and has significant benefits in terms of process simplification, functional reliability, and construction controllability.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A composite energy dissipation self-resetting steel frame connection node, characterized in that: include: Steel frame column (4), steel frame beam (1), self-resetting sliding energy dissipation mechanism (2) and self-resetting rotating energy dissipation mechanism (3); The self-resetting sliding energy dissipation mechanism (2) is connected between the steel frame column (4) and the side surface of the end of the steel frame beam (1), and is capable of absorbing energy through expansion and contraction; The self-resetting rotation energy dissipation mechanism (3) is connected between the steel frame column (4) and the end surface of the end of the steel frame beam (1), and is capable of absorbing energy through rotation.

2. A composite energy dissipation self-resetting steel frame connection node according to claim 1, characterized in that: The self-resetting sliding energy dissipation mechanism (2) comprises a first connection structure (203), a sliding energy dissipation body, and a second connection structure (2011); The sliding energy dissipation body comprises a first friction pressure head (2015), an anti-pressure ring structure (202), a second friction pressure head (2012) and a connecting piece (2013); The first friction press head (2015) is provided with a tapered hole, and the head end of the connecting member (2013) passes through the first friction press head (2015) and the anti-pressure ring structure (202) and is connected to the second friction press head (2012) as a whole; The first connection structure (203) and the second connection structure (2011) are provided at both ends of the sliding energy dissipation body and are respectively connected to the steel frame column (4) and the steel frame beam (1), and at least one of the ends is hinged; When the sliding energy dissipation body is subjected to tension, the tail end of the connecting member (2013) is squeezed by the hole wall of the first friction pressure head (2015) and absorbs energy; when the sliding energy dissipation body is subjected to pressure, the two ends of the anti-compression ring structure (202) are squeezed by the first friction pressure head (2015) and the second friction pressure head (2012) and absorb energy.

3. A composite energy dissipation self-resetting steel frame connection node according to claim 2, characterized in that: The hole of the first friction press head (2015) is a tapered hole, and the diameter gradually decreases along the passing direction of the connecting member (2013); The tail end of the connecting member (2013) is also tapered and the taper direction is consistent with the tapered hole of the first friction press head (2015).

4. A composite energy dissipation self-resetting steel frame connection node according to claim 3, characterized in that: The tail end conical portion of the connecting member (2013) is provided with an open groove, and the open groove divides the conical portion into at least two sections (2014) with a gap.

5. A composite energy dissipation self-resetting steel frame connection node according to claim 4, characterized in that: The open groove is filled with viscoelastic material, and / or the conical portion of the connecting piece (2013) is made of mild steel, or viscoelastic material, or superelastic material.

6. The composite energy dissipation self-resetting steel frame connection node according to claim 2, characterized in that: The anti-compression ring structure (202) comprises an energy dissipation ring (2022) and an extrusion ring (2021) arranged at intervals, the outer ring region of the extrusion ring (2021) being a wedge-shaped structure, and the wedge-shaped structure being axially embedded in the energy dissipation ring (2022).

7. A composite energy dissipation self-resetting steel frame connection node according to claim 6, characterized in that: The energy dissipation ring (2022) is made of superelastic material.

8. The composite energy dissipation self-resetting steel frame connection node according to claim 1, characterized in that: The self-resetting rotation energy dissipation mechanism (3) comprises a first connecting plate (302), a rotation energy dissipation body, and a second connecting plate (401); The rotating energy dissipation body comprises a first wedge ring (301) and a second wedge ring (303) which are circumferentially wedge-shaped and interlocked with each other, the back side of the first wedge ring (301) is fixedly connected to the first connecting plate (302), and the back side of the second wedge ring (303) is provided with a limiting rod (3031), and the limiting rod (3031) also slides through the second connecting plate (401); The first connecting plate (302), the rotating energy dissipation body and the second connecting plate (401) are locked by a locking rod (305), and a disc spring (304) is provided between the second connecting plate (401) and the second wedge ring (303).

9. A composite energy dissipation self-resetting steel frame connection node according to claim 8, characterized in that: The wedge-shaped chimeric body of the first wedge-shaped ring (301) and / or the second wedge-shaped ring (303) is made of a superelastic material.

10. A composite energy dissipation self-resetting steel frame, characterized in that: It comprises at least one composite energy dissipation self-resetting steel frame connection node as described in any one of claims 1 to 9.

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