Alc external wall panel and steel beam m-shaped energy dissipation connecting joint

Abstract

The utility model belongs to the field of building structure connection discloses a kind of ALC external wall panel and steel beam M type energy dissipation connecting node, and the structure uses double M type connecting piece, and the middle hollow structure is formed by the relative splicing of two M type steel plates, and the first connecting surface of one side is connected with the bottom of steel beam vertically through joint connecting surface, and the second connecting surface of the other side is close to ALC external wall panel and realizes firm anchoring through anchoring assembly.Effectively suppress wallboard cracking, shedding risk by using this structure, improve the ductility and multi-disaster adaptability of overall structure, also reduce the construction complexity by simplifying structure, ensure the consistency and reliability of connection quality, so as to realize comprehensive optimization in safety, reliability and construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of building structure connection technology, specifically relating to an M-shaped energy-dissipating connection node between an ALC external wall panel and a steel beam. Background Technology

[0002] In current building structural systems, the connection between ALC cladding panels and the main steel structure is mainly divided into two categories: rigid connection and flexible connection. Although these two connection methods have a certain structural performance basis in practical engineering applications, they have significant limitations in terms of strength, ductility, and construction adaptability when facing various complex external conditions such as temperature changes, seismic action, and uneven foundation settlement during building use. It is difficult to achieve a coordinated unity between mechanical performance and engineering application.

[0003] Specifically, existing rigid connection structures typically rely on high-stiffness metal components to firmly anchor wall panels to the structural frame. Their advantage lies in the efficient and rapid transfer of loads, making them suitable for structural environments with strict displacement control requirements and clearly defined load paths. However, these rigid connections generally lack energy dissipation design concepts. When encountering structural displacements caused by earthquakes, temperature stress, or foundation settlement, the connection points, lacking deformation release mechanisms, are prone to localized stress concentrations. Especially for brittle materials like ALC wall panels, such stress concentrations not only significantly reduce the overall structural durability but can also lead to serious safety hazards such as connector breakage, wall panel cracking, and even detachment, failing to meet the high standards of structural ductility and multi-hazard adaptability required by modern architecture. In contrast, flexible connections incorporate energy dissipation and buffering mechanisms such as slippage and deformation release in structural design. These mechanisms can absorb and disperse external energy input to a certain extent, effectively suppressing nodal stress concentrations and improving the overall ductility and seismic performance of the system. Flexible connection components can typically adapt to larger displacements and angular deformations, which helps maintain connection integrity under extreme conditions. However, existing flexible connection technologies generally have the following shortcomings: First, due to the low stiffness of the connecting components, it is often difficult to maintain sufficient connection stability under the combined effects of long-term wind loads, vertical dead loads, and repeated earthquakes, which can easily lead to problems such as node stiffness attenuation, wall panel slippage, and connection loosening. Second, in order to achieve the required energy dissipation deformation capacity, flexible connection structures usually require the use of multi-component combinations, sliding adjustment mechanisms, or special damping materials, resulting in complex overall structures and cumbersome construction forms, which require high construction precision and process control, thereby affecting the efficiency of project implementation and the consistency and reliability of connection quality.

[0004] It is evident that existing rigid and flexible connections have problems in terms of strength, ductility, and construction adaptability, which makes it impossible to guarantee the safety, reliability, and construction efficiency of the connection between the ALC exterior wall panel and the steel structure. Utility Model Content

[0005] This utility model provides an M-type energy-dissipating connection node between an ALC external wall panel and a steel beam, which effectively solves the problems of excessively high or low connection stiffness, poor structural adaptability, insufficient energy dissipation capacity, and complex installation in traditional connection methods. The use of this connection node significantly improves the overall seismic performance, construction convenience, and safety of the building envelope system.

[0006] To achieve the above objectives, the present invention adopts the following technical content: An ALC external wall panel and steel beam M-shaped energy-dissipating connection node includes a double M-shaped connector, which includes two M-shaped steel plates spliced ​​together, forming a hollow structure in the middle after the two M-shaped steel plates are spliced ​​together; one side of the double M-shaped connector is a first connection surface, and the other side is a second connection surface; a node connection surface is vertically connected to the top of the first connection surface. The top of the node connection surface is used to connect to the bottom of the steel beam; the second connection surface is in close contact with the ALC external wall panel, and the double M-shaped connector is connected to the ALC external wall panel through the anchoring component.

[0007] Furthermore, it also includes a support plate that mates with the double M-type connector. The support plate has a T-shaped structure. One side of the bottom of the support plate is connected to the top of the steel beam to form a rigid load-bearing support. The other side is inserted between two adjacent ALC exterior wall panels and is connected to the bottom of the upper ALC exterior wall panel among the two adjacent ALC exterior wall panels. It is used to support the upper ALC exterior wall panel through the rigid load-bearing support.

[0008] Furthermore, a through hole is provided at the top of the support plate, and a second bolt hole is provided at the bottom of the wall panel connecting surface of the ALC external wall panel; a through bolt is inserted into the through hole and the second bolt hole along the same axial direction; the through bolt cooperates with the nut to connect the support plate and the ALC external wall panel.

[0009] Furthermore, at least one stiffening rib structure is provided on one side of the support plate.

[0010] Furthermore, the anchoring assembly includes a continuous bolt that passes through the first connecting surface, the hollow structure, and the second connecting surface in sequence, and is connected to the wall panel connecting surface of the ALC external wall panel by a nut.

[0011] Furthermore, a first bolt hole is provided at the top of the wall panel connecting surface, a strip hole is provided on the first connecting surface, and a fixing hole is provided on the second connecting surface. The through bolt passes through the strip hole, the hollow structure, the fixing hole and the first bolt hole in sequence, and is connected to the nut.

[0012] Furthermore, the two M-shaped steel plates are integrally formed.

[0013] Furthermore, both M-shaped steel plates are made of Q235 steel plate.

[0014] Furthermore, the top of the node connection surface is connected to the bottom of the steel beam by gas metal arc welding or bolt anchoring.

[0015] Furthermore, the first connecting surface and the node connecting surface are integrally formed to create an L-shaped bending structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides an M-shaped energy-dissipating connection node between an ALC (Automatic Classified Concrete) external wall panel and a steel beam. The structure employs a double M-shaped connector, where two M-shaped steel plates are spliced ​​together to form a hollow structure in the middle. The first connecting surface on one side is vertically connected to the bottom of the steel beam via a node connection surface, while the second connecting surface on the other side is tightly attached to the ALC external wall panel and securely anchored via anchoring components. This connection node is a semi-rigid structure, combining the advantages of rigidity and flexibility: the M-shaped steel plates provide sufficient stiffness under wind loads and vertical dead loads, ensuring efficient load transfer and node stability; simultaneously, the hollow structure formed by its splicing allows for controllable deformation under external displacement, releasing energy and dispersing stress, avoiding localized stress concentration. This structure not only effectively suppresses the risk of wall panel cracking and detachment, improving the overall structural ductility and multi-hazard adaptability, but also reduces construction complexity by simplifying the construction, ensuring consistent and reliable connection quality, thereby achieving comprehensive optimization in terms of safety, reliability, and construction efficiency. Preferably, in this utility model, a support plate that cooperates with the double M-shaped connector is also added. This design separates the vertical load-bearing and horizontal energy dissipation paths. The support plate directly bears and transmits the vertical load of the upper wall panel to the steel beam through a rigid support, effectively eliminating the adverse effects of the upper load on the lower energy-dissipating double M-shaped node. This allows the double M-shaped node to more purely perform the functions of horizontal energy dissipation and deformation adaptation, greatly improving the reliability of the overall connection and the stability of the wall panel's self-weight.

[0017] Preferably, in this invention, the continuous bolt connection between the support plate and the upper wall panel provides a stable vertical anchor, ensuring that the support plate reliably bears and transfers the weight of the upper wall panel to the steel beam; at the same time, this axial connection allows for small adaptive displacement or rotational freedom in a specific direction, which helps to release temperature stress in the plane of the wall panel, avoids excessive constraint stress on the support plate itself, and improves adaptability and durability under long-term use. Preferably, in this utility model, stiffening ribs are added to the support plate. The stiffening ribs significantly enhance the local stiffness and overall bending and deformation resistance of the support plate structure. Especially when subjected to large self-weight loads or local concentrated forces, they can effectively prevent the support plate from undergoing excessive deflection or instability, ensuring its reliability and long-term service performance as a rigid load-bearing support, and guaranteeing the stability of the vertical load transmission path. Preferably, in this utility model, the double M-shaped connector and the wall panel anchoring assembly are connected by a through bolt. The through bolt passes through the first and second connecting surfaces and the hollow area and is anchored to the wall panel. While providing basic horizontal connection strength, its characteristic of passing through the hollow area allows the bolt itself to follow and coordinate deformation and bear tensile force when the node undergoes energy-dissipating deformation, becoming part of the energy-dissipating mechanism. This helps to more effectively control the node deformation mode and disperse stress, enhancing the integrity of the connection and energy dissipation efficiency.

[0018] Preferably, in this invention, the anchor bolts of the anchoring assembly pass through the first strip-shaped hole, the second fixing hole, and the wall panel hole. The first connecting surface allows the anchor bolts to undergo controllable horizontal sliding or rotation within the length of the strip-shaped hole when the double M-shaped connector is deformed under stress. This actively releases in-plane displacement and consumes energy, effectively alleviating the stress concentration phenomenon in the core area of ​​the node. At the same time, the fixing hole of the second connecting surface provides the necessary initial stiffness and rotational constraint, thus achieving a combination of rigidity and flexibility. Preferably, in this invention, the two M-shaped steel plates are integrally formed. The integral forming process eliminates splicing welds or weak points in the connection, ensuring the structural integrity and high consistency of the double M-shaped connector as a whole component. It avoids the risk of early fatigue failure caused by welding defects or contact surface problems, significantly improves the reliability and fatigue life of the node, and is more conducive to its stable operation under repeated loads. Preferably, in this invention, the M-shaped steel plate is made of Q235 steel. Using Q235 steel, which has high strength and good plasticity, to manufacture key energy-consuming components ensures that the double M-shaped connector has sufficient rigidity and load-bearing capacity when subjected to design loads. At the same time, the good plastic deformation capacity of this material allows it to undergo stable and controllable yield deformation when the node enters the energy-consuming stage, absorbing more energy without brittle fracture. This is an important material guarantee for achieving efficient energy consumption and safe ductility. Preferably, in this utility model, the node connection surface and the steel beam are preferably connected by two methods: gas metal arc welding or bolt anchoring, both of which are mature and reliable connection methods. This allows the energy-consuming node to be flexibly selected according to the specific construction conditions or design preferences of different projects, taking into account the high rigidity and high efficiency of welded connections and the construction convenience and disassembly of bolted connections, thereby improving the engineering adaptability and application range of the node.

[0019] Preferably, in this invention, the first connecting surface and the node connecting surface are integrally formed into an L-shaped bend; the integral L-shaped bend eliminates the need for welded connection in this critical part, which not only simplifies the manufacturing process, but more importantly, completely avoids the heat-affected zone, residual stress or potential weld fatigue problems that may be introduced by welding at this location, greatly enhances the reliability of the connection node in transmitting loads to the steel beam side and the safety of long-term service, and ensures the structural integrity of the core area of ​​the node. Attached Figure Description Figure 1 A schematic diagram of the double M-shaped connector in the M-shaped energy-dissipating connection node between the ALC external wall panel and the steel beam provided in the embodiment of the utility model; Figure 2 A schematic diagram of the support plate provided for an embodiment of the utility model; Figure 3 A schematic diagram of the connection node of the ALC external wall panel provided for an embodiment of the utility model; Figure 4 A cross-sectional view of the M-shaped energy-dissipating connection node between the ALC external wall panel and the steel beam, provided for an embodiment of the utility model; Figure 5 A plan view of the double M-shaped connector provided in the embodiment of the utility model; wherein, (a) is a front view, (b) is a left view, (c) is a top view, and (d) is a right view; Figure 6 A disassembly diagram of the double M-type connector provided for an embodiment of the utility model.

[0020] Figure label: 1. M-type energy-dissipating connection node; 2. Steel beam; 3. ALC external wall panel; 4. Support plate; 5. First bolt hole; 6. Second bolt hole; 7. Wall panel connection surface; 8. Continuous bolt; 9. Node connection surface; 10. Load-bearing surface; 11. Strip hole; 12. Fixing hole; 13. First connection surface; 14. Second connection surface; 15. Nut; 16. Double M-type connector. Detailed Implementation

[0021] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings: To address the problems associated with rigid and flexible connection methods, this embodiment provides an M-shaped energy-dissipating connection node between ALC cladding wall panels and steel beams. This novel structural connection method, which balances load-bearing capacity and deformation compatibility, is gaining increasing attention. Semi-rigid connection nodes not only provide sufficient initial stiffness to ensure overall structural stability but also dissipate energy through controllable plastic deformation of local components under earthquakes or large deformations, enhancing the node's ductility and toughness. Particularly in seismic design, semi-rigid connections effectively alleviate stress concentration issues associated with rigid connections while avoiding the failure risks of insufficient strength in flexible connections, exhibiting superior adaptability and overall performance. Therefore, developing a novel semi-rigid connection node that adapts to structural deformation, possesses energy-dissipating capabilities, and is easy to install is of significant engineering importance and application value for improving the safety, reliability, and construction efficiency of the connection between ALC cladding wall panels and steel structures.

[0029] like Figure 1 As shown, this embodiment provides an M-type energy-dissipating connection node between an ALC external wall panel and a steel beam, applied to the connection between the ALC external wall panel and the steel beam. The M-type energy-dissipating connection node 1 includes a double M-type connector 16 and a support plate 4. The specific structure and connection relationship are as follows: like Figure 5 As shown, specifically as follows Figure 5 As shown in Figures (a), (b), (c), and (d), the double M-shaped connector 16 is a semi-rigid connection unit, consisting of two opposing M-shaped steel plates. Both M-shaped steel plates are made of Q235 steel plate and are manufactured using an integral molding method or symmetrically welded and fixed. After splicing, a hollow structure penetrating the thickness is formed in the middle, with four sets of stress-bearing surfaces 10 in the middle. Figure 6 As shown, one side of the double M-shaped connector 16 is a first connecting surface 13, and the other side is a second connecting surface 14. The top of the first connecting surface 13 is vertically connected to the node connecting surface 9, and the two are integrally formed to form an L-shaped bent structure. The top of the node connecting surface 9 is fixedly connected to the bottom of the steel beam 2 by gas metal arc welding or bolt anchoring. The second connecting surface 14 is close to the wall panel connecting surface 7 of the ALC external wall panel 3. The top of the wall panel connecting surface 7 has a first bolt hole 5, the first connecting surface 13 has a horizontal strip hole 11, and the second connecting surface 14 has a fixing hole 12. A continuous bolt 8 passes through the strip hole 11, the hollow structure, the fixing hole 12, and the first bolt hole 5 in sequence, and is locked at the end by a nut 15, forming an anchoring assembly between the connecting node and the ALC external wall panel 3.

[0030] like Figure 2 As shown, the support plate 4 is a T-shaped steel plate structure, and its vertical plate bottom is welded to the top of the steel beam 2 to form a rigid load-bearing support. Combined with... Figure 3 and Figure 4As shown, the horizontal plate of the support plate 4 is inserted into the joint between two adjacent ALC exterior wall panels and abuts against the bottom of the upper ALC exterior wall panel 3. A second bolt hole 6 is opened at the bottom of the wall panel connecting surface 7 of the upper ALC exterior wall panel 3, and a through hole is opened at the corresponding position on the top of the support plate 4. A through bolt 8 passes through this through hole and the second bolt hole 6, and the support plate 4 is fixed to the upper ALC exterior wall panel 3 by a nut 15, thus achieving gravity transfer. At least one stiffening rib structure 17 is provided on one side of the vertical plate connecting the support plate 4 and the steel beam 2. The stiffening rib is welded between the support plate 4 and the steel beam 2 to enhance rigidity.

[0031] In this embodiment, the double M-shaped connector 16 is located between the bottom of the steel beam 2 and the top of the ALC external wall panel 3, with its node connection surface 9 connected to the steel beam 2 and its second connection surface 14 attached to the ALC external wall panel 3.

[0032] The vertical plate of the support plate 4 is attached to the web of the steel beam 2, and the horizontal plate is inserted into the gap between the upper and lower ALC external wall panels 3 and connected to the bottom of the upper wall panel 3. The through bolt 8 passes horizontally through the strip hole 11, the hollow structure and the fixing hole 12 in the double M-type connector 16, and vertically through the through hole and the wall plate bolt hole 6 in the support plate 4.

[0033] In this embodiment, the steel beam 2 is anchored to the node connection surface 9 by welding or bolts; the ALC external wall panel 3 is anchored to the double M-shaped connector 16 by through bolts 8; the upper ALC external wall panel 3 is connected to the support plate 4 by through bolts 8; and the support plate 4 is rigidly connected to the steel beam 2 by welding. In this embodiment, the core of the M-shaped energy-dissipating connection node between the ALC external wall panel and the steel beam lies in the introduction of a double M-shaped connector 16. This component is integrally formed from high-strength Q235 steel plate through laser cutting and cold bending processes, creating a unique three-dimensional spatial structure. Its structural design integrates the triple functions of "multi-faceted stress," "controllable yielding," and "deformation coordination." Under normal working conditions, it maintains high stiffness to ensure the positioning of the wall and the overall stability of the structure. When encountering earthquakes or large displacements, the specially designed oblique stress surface of the connector can undergo local plastic deformation, achieving the dissipation and release of seismic energy, thereby forming an effective energy dissipation mechanism. A single double M-shaped connector 16 forms a single connection unit, and each connection unit connects the ALC external wall panel 3 and the steel beam 2.

[0034] In this embodiment, the ALC external wall panel 3 has a circular bolt hole at each of its upper and lower ends, namely the first bolt hole 5 and the second bolt hole 6. The upper circular bolt hole is connected to the double M-shaped connector 16 for overall energy dissipation; the lower circular bolt hole is connected to the support plate 4 to support the weight of the ALC external wall panel 3. The two circular bolt holes and their respective surfaces together form the wall panel connection surface 7 of the ALC external wall panel 3.

[0035] In this embodiment, a continuous high-strength bolt connection system is introduced. Bolts 8 pass through bolt holes between multiple connecting parts and the wall panel, and are fixed with nuts 15 to form an integral connection unit. This method not only improves the connection strength but also allows for some fine-tuning under structural action, overcoming the problems of component errors and axis misalignment that exist in on-site installation.

[0036] In this embodiment, a high-strength support plate structure, namely support plate 4, is provided below the ALC external wall panel 3. It is used to bear the self-weight of the ALC external wall panel 3 and prevent it from sliding down. At the same time, a stiffening rib structure is designed to enhance its bending stiffness and stability, ensuring that the load-bearing capacity meets the requirements for long-term use. The support plate 4 is reliably connected to the steel beam by welding or bolt anchoring to form the lower fixed support node.

[0037] In this embodiment, a dual-connection-surface collaborative design is adopted. The wall panel and the double M-shaped connector 16 are connected by the upper circular bolt hole and the lower support plate, forming a two-level connection mechanism. The upper double M-shaped connector 16 is the main energy-consuming control area, and the lower support plate 4 is the load-bearing positioning area, forming a dual function of "positioning + energy consumption", which effectively enhances the comprehensive adaptability of the node system under various loads.

[0038] For example, the ALC external wall panel and the steel beam M-type energy dissipation connection node provided in this embodiment have been implemented and applied, and the specific implementation is as follows: This embodiment provides an M-type energy-dissipating connection node between an ALC external wall panel and a steel beam, that is, a connector structure used to fix the ALC external wall panel and the steel beam. This M-type energy-dissipating connection node 1 includes a double M-type connector 16. The top of the double M-type connector 16 has a dimensionally optimized node connection surface 9. The shape of the node connection surface 9 is adapted to the contact surface shape of the steel beam 2, preferably rectangular. Through precise design, the node connection surface 9 is highly matched to the area of ​​the steel beam 2 to be connected in terms of geometry and stress. The node connection surface 9 can form a stable connection with the steel beam 2 through gas metal arc welding (MIG / MAG) or high-strength bolt anchoring, ensuring good force transmission performance and structural safety under vertical and horizontal loads.

[0039] In this embodiment, a circular bolt hole is provided at each of the upper and lower ends of the ALC external wall panel 3, namely a first bolt hole 5 and a second bolt hole 6. The first bolt hole 5 at the upper end of the external ALC wall panel 3 is used to connect with the double M-type connector 16 of the M-type energy dissipation connection node 1. A combined anchoring system is formed by a through bolt 8 passing through the strip hole 11 and fixing hole 12 of the double M-type connector 16. This multi-hole cooperative method combines precise positioning and deformation adjustment functions, ensuring connection rigidity and allowing for relative displacement between the wall and structure within a certain range, thus leveraging the flexibility advantages of a semi-rigid connection. The second bolt hole 6 at the lower end of the external ALC wall panel 3 connects to a high-strength support plate 4 installed on the steel beam 2. The support plate 4 has prefabricated circular bolt holes and is rigidly fixed to the steel beam 2 by welding or anchoring, bearing the self-weight of the wall panel and the vertical load.

[0040] During construction, the continuous bolt 8 is inserted sequentially from the back of the connection node into the strip hole 11 and the fixing hole 12 on the connector, then through to the first bolt hole 5 at the upper end of the external ALC wall panel 3, and finally tightened with the nut 15, forming an adjustable assembly connection system. This design can absorb a certain amount of installation error and structural deformation, achieving a composite structural function of "allowing installation deviation + providing seismic energy dissipation". Simultaneously, the lower end of the external ALC wall panel 3 is also tightened by a similar continuous bolt 8 inserted into the support plate 4 and the second bolt hole 6 of the external ALC wall panel 3, forming a lower load-bearing support node. This connection node is mainly used to transfer the weight of the wall and for positioning, ensuring that the wall does not slip or fall off during use.

[0041] The entire connection system works in concert with the "upper semi-rigid energy dissipation nodes + lower rigid load-bearing nodes" to achieve a phased stress mechanism of "elastic control + plastic release", which effectively improves the structure's safety reserve and adaptability under earthquakes or other sudden loads.

[0042] This embodiment provides an ALC external wall panel and a steel beam M-type energy-dissipating connection node, the working principle of which is as follows: This connection node achieves efficient connection and energy management between the ALC external wall panel 3 and the main steel beam 2 through the coordinated action of upper and lower connecting components. This structure effectively addresses the complex response of the structure under vertical loads and horizontal seismic actions, exhibiting excellent seismic energy dissipation capacity and structural toughness.

[0043] In terms of specific layout, the upper connection node of the ALC external wall panel 3 is set as a plastic energy dissipation control unit 1, which is connected to the steel beam 2 using double M-shaped semi-rigid connectors. Its structure contains multiple controllable deformation zones. The lower connection node forms a rigid load-bearing support with the steel beam 2 through the support plate 4, which bears the weight of the wall panel and achieves positioning. The functions of the upper and lower nodes are clearly defined, respectively undertaking the functions of energy dissipation and gravity transmission, constructing a division-of-labor connection mode of "flexible energy dissipation + rigid support". At the same time, under the action of earthquakes or other multi-directional dynamic loads, this connection system exhibits phased and multi-dimensional response and energy dissipation behavior.

[0044] From the perspective of the force mechanism, this semi-rigid connection system mainly goes through the following two typical stages under dynamic loads such as earthquakes: the elastic response stage and the plastic response stage.

[0045] In the initial stage of an earthquake or under minor tremors, the double M-type connector 16 operates in an elastic state, with high overall node stiffness. The connection between the ALC external wall panel 3 and the steel beam 2 exhibits near-rigid connection behavior. At this time, the load is directly transferred to the steel frame through the connector, and the structural response is mainly to suppress displacement, with relatively small overall deformation, effectively controlling the swaying of the ALC external wall panel 3 and the development of initial cracks.

[0046] As the seismic load intensifies, connection node 1 enters the plastic stage. At this point, the oblique stress surface 10 of the double M-shaped connector 16 undergoes significant yielding and bending deformation, becoming the main energy dissipation area. The design of the four stress surfaces 10 ensures a reasonable distribution of energy dissipation paths, improving the ductility of the node and reducing the possibility of localized failure. Simultaneously, a shear slip effect occurs between the elliptical bolt hole area of ​​the connector and the continuous bolt 8, resulting in relative sliding after the frictional force is overcome, further dispersing and absorbing seismic energy. This "yielding-bending + shear slip" coupling mechanism not only enhances the structure's energy dissipation capacity but also improves the displacement tolerance and structural ductility of the connection node, effectively delaying connection failure and providing the main structure with a longer response adjustment time and a higher safety margin.

[0047] It is worth emphasizing that under multidimensional seismic loading (such as vertical components or out-of-plane disturbances of the wall panel), the double-M connector 16 will also exhibit significant out-of-plane deformation response. Due to the spatial structure of the double-M member 16, the connecting limbs (i.e., the load-bearing surface 10) have a symmetrical arrangement and free boundary in the direction perpendicular to the wall panel (i.e., the out-of-plane direction). Torsional, warping, or lateral deformations caused by earthquakes or wind loads will induce secondary plastic buckling of the connector in this direction. Particularly at the edge sections and corners between the limbs of the connector, due to stress concentration, local bending or buckling after plate stabilization is most likely to occur in the out-of-plane direction. These deformations remain recoverable within the design control range, exhibiting ductile buckling-type energy dissipation behavior. Therefore, this mechanism significantly enhances the multidimensional seismic resistance of the connection node and suppresses the risk of excessive swaying or detachment of the wall panel in the out-of-plane direction. In addition, out-of-plane action may also cause nonlinear contact at the edge of the bolt hole in different directions, forming multi-directional contact slip energy dissipation. That is, the shear-torsion coupling micro-motion of the bolt 8 in the elliptical bolt hole 10 further expands the friction path and increases the energy dissipation area.

[0048] The double-M type connector 16 achieves the coupling of multi-dimensional energy dissipation paths through bidirectional plastic yielding and slippage behavior in the wall direction (in-plane) and perpendicular to the wall direction (out-of-plane). This composite mechanism significantly delays the connection stiffness degradation process and improves the ductility of the joint, the stability of the wall panel, and the overall toughness of the main structure. This working mechanism not only adapts to the deformation requirements of the wall panel under three-dimensional seismic loading but also achieves energy dispersion and local damage control. While improving seismic performance, it maintains a simple structure, high construction efficiency, and broad engineering applicability.

[0049] In summary, this embodiment provides an M-shaped energy-dissipating connection node between the ALC external wall panel and the steel beam, which has the following advantages: This connection node employs double M-type connectors, demonstrating a balance of rigidity and flexibility in its structural design. Through the rational arrangement of these connectors and the plastic stress mechanism, the node is guided to achieve orderly deformation and energy dissipation under extreme loads, significantly improving the overall structural system's seismic toughness and structural rationality. Furthermore, the node's simple construction and convenient installation offer excellent engineering feasibility and promising prospects for widespread application, making it particularly suitable for prefabricated building exterior wall systems, public buildings with high seismic design requirements, and industrial plants.

[0050] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. An ALC external wall panel and steel beam M-type energy dissipation connecting joint, characterized in that, Includes a double M-shaped connector (16), which includes two M-shaped steel plates spliced ​​together, forming a hollow structure in the middle after the two M-shaped steel plates are spliced ​​together; one side of the double M-shaped connector (16) is a first connecting surface (13), and the other side is a second connecting surface (14); the top of the first connecting surface (13) is vertically connected to a node connecting surface (9). The top of the node connection surface (9) is used to connect the bottom of the steel beam (2); the second connection surface (14) is close to the ALC external wall panel (3), and the double M-type connector (16) is connected to the ALC external wall panel (3) through the anchoring component.

2. The ALC veneer wall panel to steel beam M-type energy dissipation connection node according to claim 1, characterized in that, It also includes a support plate (4) that cooperates with the double M-type connector (16). The support plate (4) adopts a T-shaped structure. One side of the bottom of the support plate (4) is connected to the top of the steel beam (2) to form a rigid load-bearing support. The other side is inserted between two adjacent ALC wall panels and is connected to the bottom of the upper ALC wall panel (3) of the two adjacent ALC wall panels. It is used to support the upper ALC wall panel (3) through the rigid load-bearing support.

3. The ALC veneer wall panel and steel beam M-type energy dissipation connection node according to claim 2, characterized in that, The support plate (4) has a through hole at the top, and the wall panel connecting surface (7) of the ALC external wall panel (3) has a second bolt hole (6) at the bottom; the through hole and the second bolt hole (6) are interspersed with a through bolt (8) along the same axis; the through bolt (8) and the nut (15) cooperate to connect the support plate (4) and the ALC external wall panel (3).

4. The ALC veneer wall panel and steel beam M-type energy dissipation connection node according to claim 2, characterized in that, The support plate (4) has at least one stiffening rib structure on one side.

5. The ALC veneer wall panel and steel beam M-type energy dissipation connection joint according to claim 1, characterized in that, The anchoring assembly includes a through bolt (8), which passes through the first connecting surface (13), the hollow structure and the second connecting surface (14) in sequence, and is connected to the wall panel connecting surface (7) of the ALC external wall panel (3) by a nut (15).

6. The ALC veneer wall panel and steel beam M-type energy dissipation connection joint according to claim 5, characterized in that, The top of the wall panel connecting surface (7) is provided with a first bolt hole (5), the first connecting surface (13) is provided with a strip hole (11), the second connecting surface (14) is provided with a fixing hole (12), and the through bolt (8) passes through the strip hole (11), the hollow structure, the fixing hole (12) and the first bolt hole (5) in sequence, and is connected to the nut (15).

7. The ALC veneer wall panel and steel beam M-type energy dissipation connection joint according to claim 1, characterized in that, The two M-shaped steel plates are integrally formed.

8. The ALC veneer wall panel to steel beam M-type energy dissipation connection node of claim 1, wherein, Both M-shaped steel plates are made of Q235 steel plate.

9. The ALC veneer wall and steel beam M-type energy dissipation connection node according to claim 1, characterized in that, The top of the node connection surface (9) is connected to the bottom of the steel beam (2) by gas metal arc welding or bolt anchoring.

10. The ALC veneer wall panel to steel beam M-type energy dissipation connection node of claim 1, wherein, The first connecting surface (13) and the node connecting surface (9) are integrally formed to form an L-shaped bending structure.

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