Aluminum alloy beam column flitch plate connecting joint and construction method thereof

Abstract

The invention discloses an aluminum alloy beam column flitch plate connecting joint and a construction method thereof, and relates to the technical field of civil engineering structure earthquake resistance, the aluminum alloy beam column flitch plate connecting joint comprises a curled edge I-shaped section aluminum alloy beam column, and stainless steel flitch plate bolting replaces welding; the special-shaped stainless steel fixing plate and the penetrating type rectangular fixing plate are arranged, and the bending rigidity is improved on the X-Z plane and the Y-Z plane correspondingly; a center-penetrating steel bar and a hoop are additionally arranged in the minor axis direction, three force transmission paths are formed, and the force transmission efficiency is optimized; the long slotted holes are formed in the beam flanges and the curled edges, earthquake energy is dissipated through sliding friction of the high-strength fasteners, and a main body structure is protected against plastic damage. The joints are divided into the first joint and the second joint, the fixing plate is shared to achieve multidirectional rigidity cooperation, and construction is simplified through the step-by-step assembly technology. The aluminum alloy beam-column joint has high rigidity and strong shock resistance, and the problems of welding defects, easy failure of dynamic load and insufficient rigidity of the aluminum alloy beam-column joint are solved through the design of bolting of the stainless steel flitch plate, optimization of the curled edge section, force transmission of the through steel bar and friction energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance of civil engineering structures. Specifically, it particularly relates to an aluminum alloy beam-column gusset connection joint and a construction method thereof. Background Art

[0002] In the connection technology of aluminum alloy beam-column joints, the gusset plate is a key force transfer and energy dissipation component, and its performance directly affects the stiffness, bearing capacity and seismic performance of the joint. However, there are significant deficiencies in the existing gusset plate technology: First, the compatibility between traditional gusset plate materials and aluminum alloy is poor, and it is easy to accelerate the aging of the connection part due to electrochemical corrosion. Moreover, the material strength and ductility do not match, and it is difficult to deform synergistically, resulting in brittle peeling or fatigue fracture of the joint under dynamic loads. Second, the gusset plate structure is single, mostly using flat plates or simple L-shaped designs, with insufficient out-of-plane stiffness, unable to effectively suppress the local buckling of the flange of the I-shaped section, and the force transfer path depends on bolt shear, resulting in low overall flexural stiffness and excessive deformation of the connection joint.

[0003] Chinese Patent Publication No. CN105672474A discloses a beam-column joint of a cruciform aluminum alloy frame structure and an installation method thereof, including: a cruciform frame structure and a reinforcement component. The cruciform frame structure is connected into an integral body through the reinforcement component to jointly bear force, deform synergistically and jointly resist the action of loads. The cruciform frame structure includes a left aluminum alloy beam, a right aluminum alloy beam and an aluminum alloy column. The left aluminum alloy beam and the right aluminum alloy beam are respectively arranged on the left and right sides of the middle part of the aluminum alloy column, and the reinforcement component is arranged between the connection parts of the left aluminum alloy beam, the right aluminum alloy beam and the aluminum alloy column. Although the above technical solution solves the problem of poor welding performance in part, there are still significant defects. Since its reinforcement component mainly relies on bolt connection of the beam flange and web, the force transfer path is discontinuous due to the cavity structure of the I-shaped column in the weak axis direction, and a multi-path collaborative force transfer mechanism cannot be formed. The joint structure focuses on the stiffness improvement of a single plane (X-Z plane), lacks the flexural design in the Y-Z plane, and is difficult to resist multi-dimensional seismic actions. The intensive opening of holes in the beam flange intensifies the section weakening, and it is easy to cause low-cycle fatigue and extrusion deformation under dynamic loads, affecting the energy dissipation performance and structural safety.

[0004] Therefore, it is urgent to develop an aluminum alloy beam-column joint with a simple structure, efficient force transfer, coordinated improvement of bidirectional flexural stiffness and convenient for rapid assembly of strong and weak axes to solve the core defects of insufficient stiffness, poor energy dissipation performance and low assembly efficiency in the prior art, and promote the engineering application of aluminum alloy frame structures. Summary of the Invention

[0005] According to the technical problems proposed above, the present invention provides an aluminum alloy beam-column plate-connected joint and its construction method. By bolt-connected stainless steel plates, optimized rolled-edge sections, force transfer through steel rods passing through the core, and friction energy dissipation design, the problems of welding defects, easy failure under dynamic loads, and insufficient stiffness of aluminum alloy beam-column joints are solved.

[0006] To achieve the above object, the technical means adopted by the present invention are as follows: An aluminum alloy beam-column plate-connected joint, comprising: A rolled-edge I-shaped section aluminum alloy column, with three positioning holes opened at the center of its web; Two groups of rolled-edge I-shaped section aluminum alloy beams respectively connected to the aluminum alloy column, including a first joint and a second joint, which are respectively connected to the aluminum alloy column through a first aluminum alloy beam and a second aluminum alloy beam; The first joint includes: an L-shaped stainless steel fixing plate, an L-shaped stainless steel shear plate, a special-shaped stainless steel fixing plate, a through-type rectangular stainless steel fixing plate, and a first high-strength stainless steel fastener. The special-shaped stainless steel fixing plate is of an L-shaped or angle-shaped structure, and is bolt-connected to the rolled-edge part of the first aluminum alloy beam through the first high-strength stainless steel fastener and connected to the flange of the aluminum alloy column, enhancing the flexural stiffness of the joint in the X-Z plane; The second joint includes: a steel rod passing through the core, a hoop, and a second high-strength stainless steel fastener. Both ends of the steel rod passing through the core are welded to the special-shaped stainless steel fixing plate through the hoop and pass through the positioning holes in the web of the aluminum alloy column, forming three force transfer paths; The through-type rectangular stainless steel fixing plate is bolt-connected to the rolled-edge parts of the aluminum alloy beams of the first joint and the second joint respectively, enhancing the flexural stiffness in the X-Z plane and the Y-Z plane respectively.

[0007] Furthermore, long slotted holes are opened at the flanges and rolled edges of the first aluminum alloy beam and the second aluminum alloy beam, and the first high-strength stainless steel fastener and the second high-strength stainless steel fastener can slide within the slotted holes.

[0008] Furthermore, both ends of the steel rod passing through the core are provided with threads, and the length is equal to the distance from the web of the aluminum alloy column to the inner wall of the special-shaped stainless steel fixing plate, and the hoop is pre-tightened on the steel rod, achieving rapid positioning and fixing through rotation.

[0009] Furthermore, the through-type rectangular stainless steel fixing plate is arranged along the Y-Z plane and is bolt-connected to the rolled edge of the second aluminum alloy beam of the second joint, and its in-plane stiffness cooperates with that of the special-shaped stainless steel fixing plate to enhance the flexural performance in the Y-Z plane.

[0010] Furthermore, the L-shaped stainless steel shear plate is fixed at the web of the first aluminum alloy beam of the first joint, and jointly with the special-shaped stainless steel fixing plate, restricts the relative displacement between the beam and the column and bears the shear force of the joint.

[0011] Further, the first node and the second node share a special-shaped stainless-steel fixing plate and a through-type rectangular stainless-steel fixing plate, and respectively strengthen the flexural stiffness in the X-Z plane and the Y-Z plane through the differential design of the through-core steel bars and the hoop.

[0012] Further, the special-shaped stainless-steel fixing plate and the through-type rectangular stainless-steel fixing plate form a double-layer connection structure through high-strength stainless-steel fasteners, and the double-layer connection structure respectively covers the inner and outer sides of the flange flanges of the first aluminum alloy beam and the second aluminum alloy beam.

[0013] The present invention also provides a construction method for the aluminum alloy beam-column gusset connection node. The installation of the aluminum alloy beam-column gusset connection node includes the following steps: S1. Align the reserved holes of the two special-shaped stainless-steel fixing plates, the L-shaped stainless-steel fixing plate and the through-type rectangular stainless-steel fixing plate on the lower side with the reserved holes of the aluminum alloy column, and fix them through the first high-strength stainless-steel fasteners; S2. Align the flange flange and the web reserved holes of the first aluminum alloy beam with the holes of the special-shaped stainless-steel fixing plate, the L-shaped stainless-steel fixing plate and the through-type rectangular stainless-steel fixing plate, and bolt them with the first high-strength stainless-steel fasteners; S3. Install the L-shaped stainless-steel shear plate; S4. Install the two special-shaped stainless-steel fixing plates and the L-shaped stainless-steel fixing plate on the upper side, and fix them through the first high-strength stainless-steel fasteners; S5. Weld one end of the through-core steel bar to the inner wall of the left special-shaped stainless-steel fixing plate, and pre-tighten the hoop (3-4) at the other end; adjust the position of the hoop through the three positioning holes on the aluminum alloy column web, weld the right through-core steel bar and tighten the hoop; S6. Align the flange flange of the second aluminum alloy beam with the holes of the through-type rectangular stainless-steel fixing plate, and bolt and fix them through the second high-strength stainless-steel fasteners.

[0014] Further, the step S3 includes the following steps: S31. Fit the vertical flange of the L-shaped stainless-steel shear plate to the web of the first aluminum alloy beam, and align the horizontal flange with the holes of the special-shaped stainless-steel fixing plate; S32. Fix the vertical flange and the horizontal flange in sequence through the first high-strength stainless-steel fasteners to form a shear force transmission path.

[0015] Further, the step S5 includes the following steps: S51. Pre-tighten the hoop to the threaded end of the through-core steel bar, and reserve an adjustment margin; S52. Insert a positioning tool through the positioning holes on the aluminum alloy column web, and adjust the hoop to contact the inner wall of the special-shaped stainless-steel fixing plate; S53. Apply torque to tighten the hoop to form a rigid force transmission path.

[0016] Due to the adoption of the above technical solution, compared with the prior art, the present invention has the following advantages: 1. A connecting joint of an aluminum alloy beam-column with a backing plate provided by the present invention, through the cooperative action of a special-shaped stainless steel fixing plate in the X-Z plane and a penetrating rectangular stainless steel fixing plate in the Y-Z plane, combined with the three-path force transmission mechanism of a through-core steel bar, significantly improves the flexural stiffness and bearing capacity of the joint under bidirectional seismic action, and avoids the local instability problem caused by the poor force transmission path of the weak axis in the traditional I-shaped aluminum alloy joint.

[0017] 2. A connecting joint of an aluminum alloy beam-column with a backing plate provided by the present invention, the contact surfaces of the long slot holes of the beam flanges and the flanges of the first aluminum alloy beam and the second aluminum alloy beam are sandblasted to form a high-friction interface. The high-strength stainless steel fasteners can slide in the slot holes, and the seismic energy is dissipated through sliding friction, so that the main body of the aluminum alloy beam-column remains in an elastic state, avoiding plastic damage and low-cycle fatigue failure, and improving the durability and seismic reliability of the joint.

[0018] 3. A connecting joint of an aluminum alloy beam-column with a backing plate provided by the present invention, in the weak axis direction, through the threaded connection and welding design of the through-core steel bar and the hoop, three force transmission paths of "column flange + through-core steel bar" are formed, solving the problem of low force transmission efficiency of the weak axis caused by the cavity of the I-shaped cross-section; at the same time, the modular design of the special-shaped stainless steel backing plate and the L-shaped shear plate realizes the efficient assembly in the strong and weak axis directions, reducing the construction complexity.

[0019] Based on the above reasons, the present invention can be widely promoted in the field of seismic technology for civil engineering structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a connecting joint of an aluminum alloy beam-column with a backing plate according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of the first joint of a connecting joint of an aluminum alloy beam-column with a backing plate according to an embodiment of the present invention; Figure 3 It is a schematic diagram of a special-shaped stainless steel fixing plate shared by the first joint and the second joint of a connecting joint of an aluminum alloy beam-column with a backing plate according to an embodiment of the present invention; Figure 4Schematic diagram of a through - type rectangular stainless - steel fixing plate shared by the first and second joints of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the second joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 6 Schematic diagram of the opening in the aluminum alloy column of the second joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the through - core steel bar and the steel bar hoop in the second joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 8 Assembly drawing corresponding to S1 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 9 Assembly drawing corresponding to S2 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 10 Assembly drawing corresponding to S3 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 11 Assembly drawing corresponding to S4 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 12 Assembly drawing corresponding to S5 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 13 Assembly drawing corresponding to S6 in the construction method of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 14 Working principle diagram I of the first joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 15 Working principle diagram II of the first joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 16 Working principle diagram I of the second joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 17 Working principle diagram II of the second joint of an aluminum alloy beam - column gusset connection node in an embodiment of the present invention; Figure 18 Schematic diagram of the transmission of three force - transmission paths of the through - core steel bar column in the second joint of an aluminum alloy beam - column gusset connection node.

[0022] In the figure: 1, aluminum alloy column; 2, first node; 3, second node; 2-1, first aluminum alloy beam; 2-2, L-shaped stainless steel fixing plate; 2-3, L-shaped stainless steel shear plate; 2-4, special-shaped stainless steel fixing plate; 2-5, through-type rectangular stainless steel fixing plate; 2-6, first high-strength stainless steel fastener; 3-1, second aluminum alloy beam; 3-2, second high-strength stainless steel fastener; 3-3, through steel bar; 3-4, hoop. Specific embodiments

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention: the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0028] For convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. may be used here to describe the spatial positional relationship of a device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0029] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0030] Embodiment 1 As Figures 1 to 7 shown, a connection node for an aluminum alloy beam-column with a gusset plate includes: a lipped I-shaped cross-section aluminum alloy column 1, in the web center of which three positioning holes are provided; Two groups of lipped I-shaped cross-section aluminum alloy beams respectively connected to the aluminum alloy column 1, including a first node 2 and a second node 3, which are respectively connected to the aluminum alloy column 1 through a first aluminum alloy beam 2-1 and a second aluminum alloy beam 3-1; The first node 2 includes: an L-shaped stainless steel fixing plate 2-2, an L-shaped stainless steel shearing plate 2-3, a special-shaped stainless steel fixing plate 2-4, a through-type rectangular stainless steel fixing plate 2-5, and a first high-strength stainless steel fastener 2-6. Among them, the special-shaped stainless steel fixing plate 2-4 is of an L-shaped or angle-shaped structure, and is bolted to the flanging part of the first aluminum alloy beam 2-1 through the first high-strength stainless steel fastener 2-6 and connected to the flange of the aluminum alloy column 1 to improve the flexural stiffness of the node in the X-Z plane; The second node 3 includes: a through steel bar 3-3, a hoop 3-4, and a second high-strength stainless steel fastener 3-2. Both ends of the through steel bar 3-3 are welded to the special-shaped stainless steel fixing plate 2-4 through the hoop 3-4 and pass through the positioning holes in the web of the aluminum alloy column 1 to form three force transmission paths; The through-type rectangular stainless steel fixing plate 2-5 is bolted to the flanging parts of the aluminum alloy beams of the first node 2 and the second node 3 respectively to improve the flexural stiffness in the X-Z plane and the Y-Z plane; Through the combined design of the flanged I-shaped aluminum alloy column 1 with the first node 2 and the second node 3, combined with the bolting of the L-shaped stainless steel fixing plate 2-2, the special-shaped stainless steel fixing plate 2-4, and the through-type rectangular stainless steel fixing plate 2-5, the flexural stiffness of the node in the X-Z and Y-Z planes is significantly improved; the introduction of the through steel bar 3-3 and the hoop 3-4 optimizes the force transmission path in the weak axis direction, solves the problems of poor force transmission and easy fatigue failure of traditional aluminum alloy nodes, and at the same time achieves a balance between rapid assembly and seismic performance.

[0031] Specifically, in the first node 2, the L-shaped stainless steel fixing plate 2-2, the L-shaped stainless steel shearing plate 2-3, the special-shaped stainless steel fixing plate 2-4, and the through-type rectangular stainless steel fixing plate 2-5 are all fixed to the first aluminum alloy beam 2-1 and the aluminum alloy column 1 of the main structure by the first high-strength stainless steel fastener 2-6. Since the application of stainless steel materials is relatively mature, the special-shaped stainless steel fixing plate 2-4 can be made into the Figure 3 shape shown in, and the special-shaped stainless steel fixing plate 2-4 significantly improves the flexural stiffness of the node in the X-Z plane. Its specific structural form is as shown in Figure 3 ; In addition to sharing the special-shaped stainless steel fixing plate 2-4 and the through-type rectangular stainless steel fixing plate 2-5 with the first node 2, the second node 3 has six additional through-steel rods 3-3 at the center positions of the upper and lower cross-sections of the special-shaped stainless steel fixing plates 2-4, and three additional circular holes are opened at the center position of the web of the curled I-section aluminum alloy column 1 for positioning the hoop 3-4. The through-steel rod 3-3 and the hoop 3-4 are arranged in the form of threads, and the length is equal to the distance from the web of the curled I-section aluminum alloy column 1 to the inner wall of the special-shaped stainless steel fixing plate 2-4, so that one end of the through-steel rod 3-3 with a thread can be directly tightened through the steel rod hoop 3-4, and the other end can be directly welded to the inner wall of the special-shaped stainless steel fixing plate 2-4. In addition to using special-shaped stainless steel fixing plates 2-4 at the upper and lower flanges of the second aluminum alloy beam 3-1, this node also has through-type rectangular stainless steel fixing plates 2-5 installed on both sides of the flange curling position. The through-type rectangular stainless steel fixing plates 2-5 are connected to the upper and lower flange curling positions of the second aluminum alloy beam 3-1 using the second high-strength stainless steel fasteners 3-2. The through-type rectangular stainless steel fixing plates 2-5 can also fully utilize their in-plane stiffness in the YZ plane, significantly improving the node bending stiffness in the YZ plane. The through-type steel rod 3-3 and the hoop 3-4 structure are as shown in FIG. Figure 7 As shown, the specific structure of the second node 3 and the opening of the web of the aluminum alloy column 1 are as follows Figure 3 As shown, the first node 2 and the second node 3 share the special-shaped stainless steel fixing plate 2-4 and the through-type rectangular stainless steel fixing plate 2-5. Through differentiated design (such as the through-core steel rod 3-3 strengthening the XZ plane, and the through-type rectangular stainless steel fixing plate 2-5 strengthening the YZ plane), the coordinated improvement of multi-directional bending stiffness is achieved, and material redundancy and construction complexity are reduced.

[0032] Example 2 like Figures 8 to 13 As shown, a construction method for an aluminum alloy beam-column plate connection node comprises the following steps: S1. Align the reserved holes of the two special-shaped stainless steel fixing plates 2-4, the L-shaped stainless steel fixing plate 2-2 and the through-type rectangular stainless steel fixing plate 2-5 on the lower side with the reserved holes of the aluminum alloy column 1, and fix them with the first high-strength stainless steel fastener 2-6; S2, align the flange curling and web reserved holes of the first aluminum alloy beam 2-1 with the holes of the special-shaped stainless steel fixing plate 2-4, the L-shaped stainless steel fixing plate 2-2 and the through-type rectangular stainless steel fixing plate 2-5, and bolt them with the first high-strength stainless steel fastener 2-6; S3. Install L-shaped stainless steel shear plate; S4, install the two special-shaped stainless steel fixing plates 2-4 and the L-shaped stainless steel fixing plate 2-2 on the upper side, and fix them with the first high-strength stainless steel fasteners 2-6; S5. Weld one end of the through steel bar 3-3 to the inner wall of the left special-shaped stainless steel fixing plate 2-4, and pre-tighten the collar 3-4 at the other end; adjust the position of the collar 3-4 through the three positioning holes on the web of the aluminum alloy column 1, weld the right through steel bar 3-3 and tighten the collar 3-4. S6. Align the flange curling of the second aluminum alloy beam 3-1 with the hole of the through rectangular stainless steel fixing plate 2-5, and bolt and fix it through the second high-strength stainless steel fastener 3-2.

[0033] Further, the S3 includes the following steps: S31. Fit the vertical flange of the L-shaped stainless steel shear plate 2-3 to the web of the first aluminum alloy beam 2-1, and align the horizontal flange with the hole of the special-shaped stainless steel fixing plate 2-4. S32. Fix the vertical flange and the horizontal flange in sequence through the first high-strength stainless steel fastener 2-6 to form a shear force transmission path.

[0034] Further, the S5 includes the following steps: S51. Pre-tighten the collar 3-4 to the threaded end of the through steel bar 3-3, and reserve an adjustment margin. S52. Insert a positioning tool through the positioning hole on the web of the aluminum alloy column 1, and adjust the collar 3-4 to contact the inner wall of the special-shaped stainless steel fixing plate 2-4. S53. Apply torque to tighten the collar 3-4 to form a rigid force transmission path.

[0035] As Figures 14 to 15 shown, the working principle of Embodiment 1 is: When the beam-column joint of the crimped I-shaped cross-section aluminum alloy beam-column is subjected to earthquake action, if the beam end of the first joint 2 is subjected to a downward displacement , a clockwise bending moment m will be generated at the beam-column joint 1 . At this time, the main stress plane of the special-shaped stainless steel fixing plate 2-4 is parallel to its direction, providing a large flexural stiffness for the joint, and the generated shear force V 1 is mainly borne by the L-shaped stainless steel shear plate 2-3 fixed at the web of the first aluminum alloy beam 2-1. The upper and lower flange L-shaped stainless steel fixing plates 2-2 convert the bending moment into axial tension and compression through the lever arm effect: the upper L-shaped stainless steel fixing plate 2-2 and the tension side are in tension and drive the bolts to be in tension, and the lower L-shaped stainless steel fixing plate 2-2, that is, the pressure side, bears pressure and transmits the pressure to the column body. If the beam end of the first joint 2 is subjected to an upward displacement , a counterclockwise bending moment -m will be generated at the beam-column joint 1 . At this time, the main stress plane of the special-shaped stainless steel fixing plate 2-4 is parallel to its direction, providing a large flexural stiffness for the joint, and the generated shear force -V 1It is mainly borne by the L-shaped stainless steel shear plate 2-3 fixed at the web of the first aluminum alloy beam 2-1. At this time, the upper and lower flange L-shaped stainless steel fixing plates 2-2 convert the bending moment into axial tension and pressure through the lever arm effect: the lower L-shaped stainless steel fixing plate 2-2 and the tension side are in tension and drive the bolt to be in tension, and the upper L-shaped stainless steel fixing plate 2-2, that is, the pressure side, bears the pressure and transmits the pressure to the column body. On the pressure side, it slides to the left in the long slot hole of the flange of the first aluminum alloy beam 2-1 , and the first high-strength stainless steel fastener 2-6 slides relatively to the right in the slot hole . On the tension side, it slides to the right in the long slot hole of the flange of the first aluminum alloy beam 2-1 , and the first high-strength stainless steel fastener 2-6 slides relatively to the left in the slot hole .

[0036] As Figures 16 to 17 shown, the working principle of Embodiment 2 is as follows: When the beam-column joint of the crimped I-shaped cross-section aluminum alloy beam is subjected to an earthquake, if the beam end of the second joint 3 is displaced downward , a clockwise bending moment m will be generated at the beam-column joint 2 . At this time, the main stress plane of the through-type rectangular stainless steel fixing plate 2-5 is parallel to the direction of the bending moment, providing greater flexural stiffness for the joint. The upper and lower flanges form a fixing plate similar to an angle steel through the special-shaped stainless steel fixing plate 2-4, and convert the bending moment into axial tension and pressure through the lever arm effect: the upper side, that is, the tension side, is in tension and drives the bolt to be in tension, and the lower side, that is, the pressure side, bears the pressure and transmits the pressure to the column body. If the beam end of the first joint 2 is displaced upward , a counterclockwise bending moment -m will be generated at the beam-column joint 2 . At this time, the main stress plane of the through-type rectangular stainless steel fixing plate 2-5 is parallel to its direction, providing greater flexural stiffness for the joint. The upper and lower flanges form a fixing plate similar to an angle steel through the special-shaped stainless steel fixing plate 2-4, and convert the bending moment into axial tension and pressure through the lever arm effect: the lower side, that is, the tension side, is in tension and drives the bolt to be in tension, and the upper side, that is, the pressure side, bears the pressure and transmits the pressure to the column body. On the pressure side, it slides to the left in the long slot hole of the flange of the second aluminum alloy beam 3-1 , and the second high-strength stainless steel fastener 3-2 slides relatively to the right in the slot hole . On the tension side, it slides to the right in the long slot hole of the flange of the second aluminum alloy beam 3-1 , and the second high-strength stainless steel fastener 3-2 slides relatively to the left in the slot hole .

[0037] Since the second node 3 is arranged on one side of the curled I-shaped section and is in a cavity state, a through steel bar 3-3 and a hoop 3-4 are provided to provide a force transmission path and strengthen the weak side of the I-shaped section. At this time, the force is transmitted through three force transmission paths, namely, the two flanges of the aluminum alloy column 1 and the through steel bar 3-3, as Figure 18 shown.

[0038] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum alloy beam-column plate connection node, characterized in that: include: A first node (2) consisting of an L-shaped stainless steel fixing plate (2-2), an L-shaped stainless steel shear plate (2-3), a special-shaped stainless steel fixing plate (2-4), a through-type rectangular stainless steel fixing plate (2-5) and a first high-strength stainless steel fastener (2-6), wherein the special-shaped stainless steel fixing plate (2-4) is an L-shaped or angle steel structure, is bolted to the rolled edge of the first aluminum alloy beam (2-1) through the first high-strength stainless steel fastener (2-6), and is connected to the flange of the aluminum alloy column (1), thereby improving the bending stiffness of the node in the XZ plane; the aluminum alloy column (1) is an aluminum alloy column (1) with a rolled I-shaped cross section; A second node (3) consisting of a second aluminum alloy beam (3-1), a through-steel rod (3-3), a hoop (3-4) and a second high-strength stainless steel fastener (3-2), wherein both ends of the through-steel rod (3-3) are welded to a special-shaped stainless steel fixing plate (2-4) via the hoop (3-4) and pass through a positioning hole of the web of the aluminum alloy column (1), thereby forming three force transmission paths; The through-type rectangular stainless steel fixing plate (2-5) is bolted to the rolled edge of the aluminum alloy beam at the first node (2) and the second node (3) at the same time, thereby improving the bending rigidity in the XZ plane and the YZ plane respectively.

2. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: Long slots are provided at the flanges and curling edges of the first aluminum alloy beam (2-1) and the second aluminum alloy beam (3-1), and the first high-strength stainless steel fastener (2-6) and the second high-strength stainless steel fastener (3-2) can slide in the slots.

3. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: The through-core steel rod (3-3) is provided with threads at both ends, the length of which is equal to the distance from the web of the aluminum alloy column (1) to the inner wall of the special-shaped stainless steel fixing plate (2-4), and the hoop (3-4) is pre-screwed on the through-core steel rod (3-3) to achieve rapid positioning and fixing through rotation.

4. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: The through-type rectangular stainless steel fixing plate (2-5) is arranged along the YZ plane and is crimped and bolted to the second aluminum alloy beam (3-1) of the second node (3). Its in-plane stiffness cooperates with the special-shaped stainless steel fixing plate (2-4) to improve the YZ plane bending resistance.

5. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: The L-shaped stainless steel shear plate (2-3) is fixed to the web of the first aluminum alloy beam (2-1) at the first node (2), and together with the special-shaped stainless steel fixing plate (2-4) limits the relative displacement of the beam and column, and bears the node shear force.

6. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: The first node (2) and the second node (3) share a special-shaped stainless steel fixing plate (2-4) and a through-type rectangular stainless steel fixing plate (2-5), and through the differentiated design of the through-core steel rod (3-3) and the hoop (3-4), the bending stiffness of the XZ plane and the YZ plane are respectively strengthened.

7. The aluminum alloy beam-column plate connection node according to claim 1, characterized in that: The special-shaped stainless steel fixing plate (2-4) and the through-type rectangular stainless steel fixing plate (2-5) form a double-layer connection structure through high-strength stainless steel fasteners, and the double-layer connection structure covers the inner and outer sides of the flange curling of the first aluminum alloy beam (2-1) and the second aluminum alloy beam (3-1) respectively.

8. A construction method for an aluminum alloy beam-column plate connection node, applied to an aluminum alloy beam-column plate connection node as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1, aligning the reserved holes of the two special-shaped stainless steel fixing plates (2-4), the L-shaped stainless steel fixing plate (2-2) and the through-type rectangular stainless steel fixing plate (2-5) on the lower side with the reserved holes of the aluminum alloy column (1), and fixing them with the first high-strength stainless steel fastener (2-6); S2, aligning the flange curling and reserved holes of the web of the first aluminum alloy beam (2-1) with the holes of the special-shaped stainless steel fixing plate (2-4), the L-shaped stainless steel fixing plate (2-2) and the through-type rectangular stainless steel fixing plate (2-5), and bolting them using the first high-strength stainless steel fastener (2-6); S3, install L-shaped stainless steel shear plate (2-3); S4, installing two special-shaped stainless steel fixing plates (2-4) and an L-shaped stainless steel fixing plate (2-2) on the upper side, and fixing them with a first high-strength stainless steel fastener (2-6); S5, welding one end of the through-core steel rod (3-3) to the inner wall of the left special-shaped stainless steel fixing plate (2-4), and pre-tightening the ferrule (3-4) on the other end; adjusting the position of the ferrule (3-4) through the three positioning holes of the web of the aluminum alloy column (1), welding the through-core steel rod (3-3) on the right side and tightening the ferrule (3-4); S6. Align the flange curling edge of the second aluminum alloy beam (3-1) with the hole of the through-type rectangular stainless steel fixing plate (2-5), and bolt and fix them via the second high-strength stainless steel fastener (3-2).

9. The construction method of an aluminum alloy beam-column plate connection node according to claim 8, characterized in that: The S3 includes the following steps: S31, fitting the vertical flange of the L-shaped stainless steel shear plate (2-3) to the web of the first aluminum alloy beam (2-1), and aligning the horizontal flange with the hole of the special-shaped stainless steel fixing plate (2-4); S32. The vertical flange and the horizontal flange are fixed in sequence by the first high-strength stainless steel fastener (2-6) to form a shear force transmission path.

10. The aluminum alloy beam-column plate connection node construction method according to claim 8, characterized in that: The S5 includes the following steps: S51, pre-tighten the ferrule (3-4) to the threaded end of the through-core steel rod (3-3), leaving an adjustment margin; S52, inserting a positioning tool through the positioning hole of the web of the aluminum alloy column (1), and adjusting the ferrule (3-4) until it contacts the inner wall of the special-shaped stainless steel fixing plate (2-4); S53, apply torque to tighten the ferrule (3-4) to form a rigid force transmission path.

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