An assembled steel-bamboo hybrid frame friction energy dissipation joint and a construction method thereof

Abstract

The application relates to a fabricated steel-bamboo mixed frame friction energy dissipation node and a construction method thereof, and belongs to the technical field of structural engineering. The fabricated steel-bamboo mixed frame friction energy dissipation node comprises an H-shaped steel column and an engineering bamboo beam. The energy dissipation node further comprises unequal limb connecting angle steel, an outer energy dissipation plate, a U-shaped energy dissipation piece and a friction type energy dissipation inclined brace. The application is improved on the basis of the traditional plug-in plate bolt node and the node disclosed in the above patent. Through the setting of the friction type energy dissipation plate piece and the inclined brace, the node can have strong energy dissipation capacity and good ductility, delay the splitting damage of the engineering bamboo material, and simultaneously enable the frame structure to have effective lateral stiffness.

Description

TECHNICAL FIELD

[0001] The application relates to an assembled energy dissipation node, in particular to an assembled steel-bamboo hybrid frame friction energy dissipation node and a construction method thereof, and belongs to the technical field of structural engineering. BACKGROUND

[0002] The building industry is a key field of global carbon emission reduction, and its energy consumption accounts for 36% of global energy consumption. A large amount of greenhouse gases will be emitted during the manufacture of traditional building materials such as concrete and steel. Ecological materials such as bamboo have the advantages of green environmental protection, short growth cycle, renewability and wide distribution, and have attracted great attention in recent years.

[0003] The steel-bamboo hybrid frame formed by combining a traditional H-shaped steel column and an engineering bamboo beam has a certain lateral stiffness and simultaneously reduces the carbon emission of the structure at the component level. The node of the beam-column component in the frame structure is a key part of the whole structure. At present, the existing connection mode of the steel-bamboo hybrid frame beam-column node is mainly steel inserts plus through bolts. Because the transverse strength of the engineering bamboo is too low, splitting failure easily occurs near the bolt hole under external force, which seriously affects the safety of the structure.

[0004] The currently disclosed patent CN116180923A discloses a friction-bending composite energy dissipation prestressed self-resetting steel-bamboo combined beam-column node. The node is provided with a friction-bending composite energy dissipation device at the web of the thin-walled I-beam to provide energy dissipation capacity, so that the structure can well dissipate external loads. However, it has limitations: the stiffness of the cold-formed thin-walled steel beam segment at the beam end without glued bamboo is small, and local and overall buckling and out-of-plane deformation easily occur, causing the node to fail prematurely; the anchoring of the prestressed tendon for realizing self-resetting is difficult, and the loss of prestress cannot be avoided, making it difficult for the structure to have ideal self-resetting function. The disclosed patent CN115012528A discloses an adjustable prestressed self-resetting engineering bamboo beam-column node. The node realizes the functions of improving the self-resetting performance, initial stiffness and bending capacity of the node through a self-resetting system composed of steel strands, pulley guide devices, anchoring devices, jacks and prestress monitoring devices. However, the node assembly is complex and difficult to apply in engineering practice. The disclosed patent CN115772942A discloses a reconstituted bamboo beam-column frame node connected by a combination. The oval bolt through hole of the half tenon of the tenon-and-mortise connection piece is connected to the reconstituted bamboo column by a bolt, so that friction energy is generated between the half tenon and the mortise, which significantly improves the anti-pulling tenon capacity while fully utilizing the excellent energy dissipation capacity of the half tenon structure. However, the force of the tenon-and-mortise connection is complex, and the slot at the beam end of the node is too large, which weakens the bearing capacity of the engineering bamboo beam. At the same time, the node is essentially a plug-in bolt connection without effective lateral force resisting members, and the structure is unstable. SUMMARY

[0005] In view of the above defects of the prior art, the application provides a fabricated steel-bamboo hybrid frame friction energy dissipation node and a construction method thereof.The application improves the traditional plug-in bolt node and the node disclosed in the above patent, and sets a friction type energy dissipation plate and a diagonal brace, so that the node has strong energy dissipation capacity and good ductility, delays the splitting damage of the engineering bamboo, and enables the frame structure to have effective lateral stiffness.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0007] A fabricated steel-bamboo hybrid frame friction energy dissipation node, comprising an H-shaped steel column and an engineering bamboo beam, the energy dissipation node further comprising unequal limb connecting angle steels, an outer energy dissipation plate, a U-shaped energy dissipation piece and a friction type energy dissipation diagonal brace.

[0008] The H-shaped steel column and the engineering bamboo beam are connected through two unequal limb connecting angle steels and a plurality of high-strength bolts; the outer energy dissipation plate and the U-shaped energy dissipation piece are arranged between the front and rear connecting angle steels of the engineering bamboo beam, the U-shaped energy dissipation piece is arranged on the top surface and the bottom surface of the end of the engineering bamboo beam, the upper and lower ends of the outer energy dissipation plate are connected with the front and rear side plates of the U-shaped energy dissipation piece, and the outer energy dissipation plate and the U-shaped energy dissipation piece are bolted to the outer side of the front and rear side plates of the U-shaped energy dissipation piece, the outer energy dissipation plate and the U-shaped energy dissipation piece integrally wrap and hold the end of the engineering bamboo beam, and abut against the H-shaped steel column.

[0009] The front and rear side plates of the U-shaped energy dissipation piece are provided with long strip-shaped enlarged bolt holes, so as to facilitate relative rotation of the outer energy dissipation plate and energy dissipation.

[0010] The U-shaped energy dissipation piece and the H-shaped steel column are connected with the friction type energy dissipation diagonal brace; the friction type energy dissipation diagonal brace is formed by connecting the inner energy dissipation plate of the diagonal brace and the outer energy dissipation plate of the diagonal brace through a plurality of high-strength bolts.

[0011] Further, the U-shaped energy dissipation pieces at the far column ends of the two ends of the friction type energy dissipation diagonal brace and the H-shaped steel column are each welded with a connecting lug plate, and the friction type energy dissipation diagonal brace and the connecting lug plate are connected through a pin shaft.

[0012] Further, the inner energy dissipation plate of the diagonal brace in the friction type energy dissipation diagonal brace is a single plate, the outer energy dissipation plate of the diagonal brace is a double plate, and the inner energy dissipation plate of the diagonal brace is fixed to the inner side of the outer energy dissipation plate of the diagonal brace through a high-strength bolt.

[0013] Further, the inner side of the outer energy dissipation plate of the diagonal brace is fixed with a brass friction plate.

[0014] Further, the H-shaped steel column is further provided with a rib plate.

[0015] Further, the rib plate is welded on both sides of the web plate of the node core area position H-shaped steel column, and is symmetrically arranged.

[0016] Furthermore, a brass friction plate is provided between the external energy dissipation plate and the U-shaped energy dissipation component, and the external energy dissipation plate, the U-shaped energy dissipation component, and the engineering bamboo beam are connected together by high-strength tie bolts.

[0017] Furthermore, the front and rear side plates of the U-shaped energy-consuming component are trapezoidal in shape.

[0018] The construction method for the above-mentioned prefabricated steel-bamboo hybrid frame friction energy dissipation joint includes the following steps:

[0019] Step 1: Prefabricate H-shaped steel columns in the factory. Drill holes on the upper flange of the H-shaped steel column along the column elevation direction according to the arrangement of high-strength bolts. Then, weld ribs symmetrically on both sides of the web at the core area of ​​the column node to form the H-shaped steel column.

[0020] Step 2: Prefabricate the engineering bamboo beams in the factory, and prefabricate through bolt holes on the front and back of the engineering bamboo beams according to the arrangement of high-strength tie bolts to form the engineering bamboo beams;

[0021] Step 3: Pre-drill bolt holes on the long and short legs of the front and rear unequal-leg connecting angle steel according to the arrangement of high-strength tie bolts. The cutting length of the front and rear unequal-leg connecting angle steel is equal to the height of the engineering bamboo beam.

[0022] Step 4: Prefabricate the external energy-dissipating plate and U-shaped energy-dissipating component. Pre-drill bolt holes on the external energy-dissipating plate according to the arrangement of high-strength tie bolts. Then weld the two external energy-dissipating plates to the unequal-leg connecting angle steel at the front and rear of the engineering bamboo beam. Note that the bolt holes of the external energy-dissipating plate and the long leg of the unequal-leg connecting angle steel should be aligned with each other. The U-shaped energy-dissipating component is made of steel plate by welding and cutting. Two long strip-shaped enlarged bolt holes are pre-drilled on its side near the column end. The upper far column end is welded with a connecting ear plate. A brass friction plate with pre-drilled normal-sized bolt holes is set between the external energy-dissipating plate and the U-shaped energy-dissipating component to delay the wear of the energy-dissipating plate.

[0023] Step 5: Prefabricate friction-type energy-dissipating braces in the factory. These braces consist of an outer double-layered outer energy-dissipating plate and an inner single-layered inner energy-dissipating plate. The outer energy-dissipating plate has pre-drilled bolt holes of normal size, arranged according to the high-strength bolt layout. The inner energy-dissipating plate has pre-drilled elongated, enlarged bolt holes. The spacing between the outer and inner energy-dissipating plates is greater than the thickness of the inner plate. Brass friction plates with pre-drilled bolt holes are placed between the outer and inner energy-dissipating plates. Pin holes are pre-drilled at the ends of both the outer and inner energy-dissipating plates for inserting pins. The thickness of the ends of the outer and inner energy-dissipating plates must match the spacing between the connecting lugs.

[0024] Step Six: On-site installation, including the following installation steps:

[0025] Step 6.1: Align the bolt holes on the short legs of the two unequal-leg connecting angle steels with the bolt holes on the flanges of the H-beam steel column, and tighten them with high-strength bolts;

[0026] Step 6.2: Place the external energy-dissipating plate, U-shaped energy-dissipating component, and engineering bamboo beam in sequence along the beam width direction. Note that the engineering bamboo beam near the column end should be tightly fitted with the flange of the H-shaped steel column, the engineering bamboo beam should be tightly fitted with the contact surface of each connector and the bolt holes should be aligned, and the engineering bamboo beam should be tightly fitted with the contact surface of each energy-dissipating plate and the bolt holes should be aligned.

[0027] Step 6.3: Use high-strength tie bolts to fasten the long legs of the unequal-leg connecting angle steel to the engineering bamboo beam and each energy-dissipating plate;

[0028] Step 6.4: Insert the inner energy-dissipating plate of the friction-type energy-dissipating brace between the outer energy-dissipating plates, aligning the ordinary bolt holes of the outer energy-dissipating plate with the elongated enlarged bolt holes of the inner energy-dissipating plate. Ensure that there is sufficient clearance on both sides of the elongated enlarged bolt holes to ensure that the outer and inner energy-dissipating plates can slide relative to each other when the friction-type energy-dissipating brace is subjected to tension and compression. At the same time, use high-strength bolts to fasten the outer and inner energy-dissipating plates of the brace together.

[0029] Step 6.5: Align the bolt holes of the connecting ear plate base on the upper and lower parts of the engineering bamboo beam with the corresponding bolt holes on the flange of the H-shaped steel column, and use high-strength bolts to fasten the connecting ear plate to the H-shaped steel column.

[0030] Step 6.6: Align the pin holes at both ends of the friction-type energy-dissipating diagonal brace with the pin holes of the connecting ear plates on the H-shaped steel column and the engineering bamboo beam, and then insert the pin shaft. At this point, the installation of the prefabricated steel-bamboo hybrid frame friction energy-dissipating node is completed.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) All connecting parts and energy-consuming devices of the node can be prefabricated in the factory and then connected on site by bolts without welding;

[0033] (2) Each energy-consuming plate, connecting angle steel, and friction-type energy-consuming diagonal brace can be replaced at any time after wear and damage;

[0034] (3) The energy dissipation in the three stages is achieved by the combination of energy dissipation plates, friction-type energy dissipation braces and high-strength tie bolts bending deformation or bolt hole bearing failure, thereby enabling the nodes to have strong energy dissipation capacity and making the overall structure have good seismic performance.

[0035] (4) Due to the presence of friction-type diagonal bracing, the lateral stiffness of the hybrid frame can be improved to a certain extent. Attached Figure Description

[0036] Figure 1 This is a detailed 3D structural diagram of the nodes of the present invention;

[0037] Figure 2 This is a detailed drawing of the unequal-limb connecting angle steel structure of the present invention;

[0038] Figure 3 This is a detailed structural drawing of the external energy-consuming plate and U-shaped energy-consuming component of the present invention;

[0039] Figure 4 This is a detailed drawing of the friction-type energy-dissipating diagonal brace structure of the present invention;

[0040] Figure 5 This is a top view of the nodes of the present invention;

[0041] Figure 6 This is a front view of the node in this invention;

[0042] Figure 7 This is the right view of the node in this invention. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-7 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0044] Example 1

[0045] As attached Figures 1-7 As shown, a prefabricated steel-bamboo hybrid frame friction energy dissipation node in this embodiment includes an H-shaped steel column 1, an engineering bamboo beam 2, and the energy dissipation node also includes unequal-limb connecting angle steel 4, an external energy dissipation plate 5, a U-shaped energy dissipation component 6, and a friction-type energy dissipation diagonal brace 7.

[0046] like Figures 2-3 As shown, the H-shaped steel column 1 and the engineering bamboo beam 2 are connected by two unequal-legged connecting angle steels 4 and multiple high-strength bolts 11. An external energy-dissipating plate 5 and a U-shaped energy-dissipating component 6 are installed between the front and rear connecting angle steels 4 of the engineering bamboo beam 2. The U-shaped energy-dissipating component 6 is located on the top and bottom surfaces of the ends of the engineering bamboo beam 2, and its front and rear side plates are trapezoidal. The upper and lower ends of the external energy-dissipating plate 5 are connected to the front and rear side plates of the U-shaped energy-dissipating component 6 and are bolted to the outside of the front and rear side plates of the U-shaped energy-dissipating component 6. The external energy-dissipating plate 5 and the U-shaped energy-dissipating component 6 together wrap around and clamp the ends of the engineering bamboo beam 2 and abut against the H-shaped steel column 1. The front and rear side plates of the U-shaped energy-dissipating component 6 have elongated enlarged bolt holes to facilitate relative rotation with the external energy-dissipating plate 5 for energy dissipation. Specifically, as shown... Figure 3 As shown, a brass friction plate is provided between the external energy dissipation plate 5 and the U-shaped energy dissipation component 6, and the external energy dissipation plate 5, the U-shaped energy dissipation component 6 and the engineering bamboo beam 2 are connected together by high-strength tie bolts 8.

[0047] like Figure 1 and Figure 4 As shown, a friction-type energy-dissipating brace 7 connects the U-shaped energy-dissipating component 6 to the H-shaped steel column 1. The friction-type energy-dissipating brace 7 is composed of an inner energy-dissipating plate 71 and an outer energy-dissipating plate 72 connected by multiple high-strength bolts 11. Connecting lugs 10 are welded to the distal ends of the U-shaped energy-dissipating component 6 at both ends of the friction-type energy-dissipating brace 7 and to the H-shaped steel column 1. The friction-type energy-dissipating brace 7 and the connecting lugs 10 are connected by a pin 9.

[0048] In this embodiment, the inner energy-dissipating plate 71 of the friction-type energy-dissipating brace 7 is a single plate, and the outer energy-dissipating plate 72 is a double plate. The inner energy-dissipating plate 71 is fixed to the inner side of the outer energy-dissipating plate 72 by high-strength bolts 11. A brass friction plate is fixed to the inner side of the outer energy-dissipating plate 72.

[0049] In this embodiment, as Figure 1 As shown, the H-shaped steel column 1 is also provided with ribs 3. The ribs 3 are welded to both sides of the web of the H-shaped steel column 1 at the core area of ​​the node, and are arranged symmetrically.

[0050] Example 2

[0051] The construction method of the prefabricated steel-bamboo hybrid frame friction energy dissipation node in Embodiment 1 above specifically includes the following steps:

[0052] Step 1: Prefabricate H-shaped steel column 1 in the factory. According to the arrangement of high-strength bolts 11, pre-drill holes on the upper flange of H-shaped steel column 1 along the column elevation direction. Then, weld four rib plates 3 symmetrically on both sides of the web at the core area of ​​the column node to form H-shaped steel column 1.

[0053] Step 2: Prefabricate the engineering bamboo beam 2 in the factory. According to the arrangement of the high-strength tie bolts 8, prefabricate four long bolt holes in two rows on the front and back of the engineering bamboo beam 2 to form the engineering bamboo beam 2.

[0054] Step 3: Pre-drill four bolt holes in double rows on the long and short legs of the front and rear unequal-leg connecting angle steel 4 according to the arrangement of high-strength tie bolts 8. The cutting length of the front and rear unequal-leg connecting angle steel 4 is equal to the height of the engineering bamboo beam 2.

[0055] Step 4: Prefabricate the external energy-dissipating plate 5 and the U-shaped energy-dissipating component 6. Prefabricate four bolt holes on the external energy-dissipating plate 5 according to the arrangement of the high-strength tie bolts 8. Then weld the two external energy-dissipating plates 5 to the unequal-leg connecting angle steel 4 at the front and rear of the engineering bamboo beam 2. Note that the bolt holes on the long legs of the external energy-dissipating plate 5 and the unequal-leg connecting angle steel 4 must be aligned. The U-shaped energy-dissipating component 6 is made of three steel plates through welding and cutting. Two long, enlarged bolt holes are prefabricated on its side near the column end, and an ear plate is welded to the upper end far from the column. A 3mm thick brass friction plate with prefabricated, normally sized bolt holes is placed between the external energy-dissipating plate 5 and the U-shaped energy-dissipating component 6 to slow down the wear of the energy-dissipating plate.

[0056] Step 5: Prefabricate the friction-type energy-dissipating brace 7 in the factory. The friction-type energy-dissipating brace 7 consists of an outer double-layered outer energy-dissipating plate 72 and an inner single-layered inner energy-dissipating plate 71. The outer energy-dissipating plate 72 has three pre-drilled bolt holes of normal size according to the arrangement of high-strength bolts 11. The inner energy-dissipating plate 71 has pre-drilled elongated enlarged bolt holes. The spacing of the outer energy-dissipating plates 72 should be 6 to 7 millimeters larger than the thickness of the inner energy-dissipating plate 71. A 3-millimeter-thick brass friction plate with pre-drilled normal bolt holes is provided between the outer energy-dissipating plate 72 and the inner energy-dissipating plate 71. Pin holes are pre-drilled at the ends of the outer energy-dissipating plate 72 and the inner energy-dissipating plate 71 for inserting pins 9. The thickness of the ends of the outer energy-dissipating plate 72 and the inner energy-dissipating plate 71 should match the spacing between the connecting ear plates 10.

[0057] Step Six: On-site installation, including the following installation steps:

[0058] Step 6.1: Align the bolt holes on the short legs of the two unequal-leg connecting angle steels 4 with the bolt holes on the flange of the H-shaped steel column 1, and fasten them together with four high-strength bolts 11.

[0059] Step 6.2: Place the external energy-dissipating plate 5, the U-shaped energy-dissipating component 6, and the engineering bamboo beam 2 in sequence along the beam width direction. Note that the engineering bamboo beam 2 should be in close contact with the flange of the H-shaped steel column 1 near the column end, the engineering bamboo beam 2 should be in close contact with the contact surfaces of each connecting component and the bolt holes should be aligned, and the engineering bamboo beam 2 should be in close contact with the contact surfaces of each energy-dissipating plate and the bolt holes should be aligned.

[0060] Step 6.3: Use high-strength tie bolts 8 to fasten the long leg of the unequal-leg connecting angle steel 4 to the engineering bamboo beam 2 and each energy-consuming plate.

[0061] Step 6.4: Insert the inner energy-dissipating plate 71 of the friction-type energy-dissipating diagonal brace 7 between the outer energy-dissipating plate 72 of the diagonal brace, so that the ordinary bolt hole of the outer energy-dissipating plate 72 of the diagonal brace is aligned with the elongated enlarged bolt hole of the inner energy-dissipating plate 71 of the diagonal brace. Make sure that there is enough space on both sides of the elongated enlarged bolt hole to ensure that the outer energy-dissipating plate 72 and the inner energy-dissipating plate 71 of the diagonal brace can slide relative to each other when the friction-type energy-dissipating diagonal brace 7 is subjected to tension and compression. At the same time, use high-strength bolts 11 to fasten the outer energy-dissipating plate 72 and the inner energy-dissipating plate 71 of the diagonal brace.

[0062] Step 6.5: Align the bolt holes on the base of the connecting ear plate 10 on the upper and lower parts of the engineering bamboo beam 2 with the corresponding bolt holes on the flange of the H-shaped steel column 1, and use high-strength bolts 11 to fasten the connecting ear plate 10 to the H-shaped steel column 1.

[0063] Step 6.6: Align the pin holes at both ends of the friction-type energy-dissipating diagonal brace 7 with the pin holes of the connecting ear plate 10 on the H-shaped steel column 1 and the engineering bamboo beam 2, and then insert the pin shaft 9. At this point, the installation of the prefabricated steel-bamboo hybrid frame friction energy-dissipating node is completed.

[0064] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the structure of the present invention. The arrangement and quantity of the present invention are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of the present invention, without departing from the scope of the present invention, are still within the scope of the present invention.

Claims

1. A construction method for a prefabricated steel-bamboo hybrid frame friction energy dissipation node, wherein the prefabricated steel-bamboo hybrid frame friction energy dissipation node includes H-shaped steel columns (1), engineering bamboo beams (2), and the energy dissipation node further includes unequal-limb connecting angle steel (4), external energy dissipation plate (5), U-shaped energy dissipation component (6) and friction-type energy dissipation diagonal brace (7); The H-shaped steel column (1) and the engineering bamboo beam (2) are connected by two unequal-legged connecting angle steels (4) and multiple high-strength bolts (11); wherein, The outer energy-consuming plate (5) and the U-shaped energy-consuming component (6) are provided between the front and rear connecting angle steels of the engineering bamboo beam (2). The U-shaped energy-consuming component (6) is set on the top and bottom surfaces of the end of the engineering bamboo beam (2). The upper and lower ends of the outer energy-consuming plate (5) are connected to the front and rear side plates of the U-shaped energy-consuming component (6) and bolted to the outside of the front and rear side plates of the U-shaped energy-consuming component (6). The outer energy-consuming plate (5) and the U-shaped energy-consuming component (6) together wrap and clamp the end of the engineering bamboo beam (2) and abut against the H-shaped steel column (1). The front and rear side plates of the U-shaped energy-consuming component (6) are provided with long strip-shaped enlarged bolt holes so as to allow relative rotation with the outer energy-consuming plate (5) to consume energy. The friction-type energy-dissipating diagonal brace (7) is connected between the U-shaped energy-dissipating component (6) and the H-shaped steel column (1); the friction-type energy-dissipating diagonal brace (7) is formed by connecting the inner energy-dissipating plate (71) and the outer energy-dissipating plate (72) of the diagonal brace through multiple high-strength bolts (11); the far end of the U-shaped energy-dissipating component (6) at both ends of the friction-type energy-dissipating diagonal brace (7) and the H-shaped steel column (1) are both welded with connecting ear plates (10), and the friction-type energy-dissipating diagonal brace (7) and the connecting ear plates (10) are connected by a pin (9); Its features include the following steps: Step 1: Prefabricate H-shaped steel columns (1) in the factory, pre-drill holes on the upper flange of the H-shaped steel column (1) according to the arrangement of high-strength bolts (11) along the column elevation direction, and then symmetrically weld ribs (3) on both sides of the web at the core area of ​​the column node to form H-shaped steel column (1). Step 2: Prefabricate the engineering bamboo beam (2) in the factory, and prefabricate through bolt holes on the front and back of the engineering bamboo beam (2) according to the arrangement of high-strength tie bolts (8) to form the engineering bamboo beam (2); Step 3: Pre-drill bolt holes on the long and short legs of the front and rear unequal-leg connecting angle steel (4) according to the arrangement of high-strength tie bolts (8). The cutting length of the front and rear unequal-leg connecting angle steel (4) is equal to the height of the engineering bamboo beam (2). Step 4: Prefabricate the external energy dissipation plate (5) and the U-shaped energy dissipation component (6). Prefabricate bolt holes on the external energy dissipation plate (5) according to the arrangement of high-strength tie bolts (8). Then weld the two external energy dissipation plates (5) to the unequal leg connecting angle steel (4) at the front and rear of the engineering bamboo beam (2). Note that the bolt holes of the external energy dissipation plate (5) and the long leg of the unequal leg connecting angle steel (4) should be aligned with each other. The U-shaped energy dissipation component (6) is made of steel plate by welding and cutting. Two long strip-shaped enlarged bolt holes are prefabricated on its side near the column end. The upper far column end is welded with connecting ear plate. A brass friction plate with prefabricated normal-sized bolt holes is set between the external energy dissipation plate (5) and the U-shaped energy dissipation component (6) to delay the wear of the energy dissipation plate. Step 5: Prefabricate the friction-type energy-dissipating diagonal brace (7) in the factory. The friction-type energy-dissipating diagonal brace (7) is divided into an outer double-layer diagonal brace outer energy-dissipating plate (72) and an inner single-layer diagonal brace inner energy-dissipating plate (71). The outer energy-dissipating plate (72) is prefabricated with bolt holes of normal size according to the arrangement of high-strength bolts (11). The inner energy-dissipating plate (71) is prefabricated with long strip-shaped enlarged bolt holes. The spacing of the outer energy-dissipating plate (72) is larger than the thickness of the inner energy-dissipating plate (71). Brass friction plates with prefabricated normal bolt holes are set between the outer energy-dissipating plate (72) and the inner energy-dissipating plate (71). Pin holes are prefabricated at the ends of the outer energy-dissipating plate (72) and the inner energy-dissipating plate (71) for inserting pin shafts (9). The thickness of the ends of the outer energy-dissipating plate (72) and the inner energy-dissipating plate (71) should match the spacing between the connecting ear plates (10). Step Six: On-site installation.

2. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 1, characterized in that: The friction-type energy-dissipating diagonal brace (7) has a single inner energy-dissipating plate (71) and a double outer energy-dissipating plate (72). The inner energy-dissipating plate (71) is fixed to the inner side of the outer energy-dissipating plate (72) by high-strength bolts (11).

3. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 2, characterized in that: A brass friction plate is fixed on the inner side of the diagonal brace outer energy dissipation plate (72).

4. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 3, characterized in that: The H-shaped steel column (1) is also provided with ribs (3).

5. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 4, characterized in that: The ribs (3) are welded to both sides of the web of the H-shaped steel column (1) at the core area of ​​the node, and are arranged symmetrically.

6. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 5, characterized in that: A brass friction plate is provided between the external energy dissipation plate (5) and the U-shaped energy dissipation component (6), and the external energy dissipation plate (5), the U-shaped energy dissipation component (6) and the engineering bamboo beam (2) are connected together by high-strength tie bolts (8).

7. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 1, characterized in that: The front and rear side plates of the U-shaped energy-consuming component (6) are trapezoidal in shape.

8. The construction method of a prefabricated steel-bamboo hybrid frame friction energy dissipation node according to claim 1, characterized in that, Step six includes the following installation steps: Step 6.1: Align the bolt holes on the short legs of the two unequal-leg connecting angle steels (4) with the bolt holes on the flange of the H-shaped steel column (1), and fasten them with high-strength bolts (11); Step 6.2: Place the external energy dissipation plate (5), U-shaped energy dissipation component (6), and engineering bamboo beam (2) in sequence along the beam width direction. Note that the engineering bamboo beam (2) should be tightly fitted with the flange of the H-shaped steel column (1) near the column end, the engineering bamboo beam (2) should be tightly fitted with the contact surface of each connecting component and the bolt holes should be aligned, and the engineering bamboo beam (2) should be tightly fitted with the contact surface of each energy dissipation plate and the bolt holes should be aligned. Step 6.3: Use high-strength tie bolts (8) to fasten the long legs of the unequal-leg connecting angle steel (4) to the engineering bamboo beam (2) and each energy-consuming plate; Step 6.4: Insert the inner energy-dissipating plate (71) of the friction-type energy-dissipating diagonal brace (7) between the outer energy-dissipating plate (72) of the diagonal brace, so that the ordinary bolt hole of the outer energy-dissipating plate (72) of the diagonal brace is aligned with the long strip enlarged bolt hole of the inner energy-dissipating plate (71) of the diagonal brace. Make sure that there is enough space on both sides of the long strip enlarged bolt hole to ensure that the outer energy-dissipating plate (72) and the inner energy-dissipating plate (71) of the diagonal brace can slide relative to each other when the friction-type energy-dissipating diagonal brace (7) is subjected to tension and compression. At the same time, use high-strength bolts (11) to fasten the outer energy-dissipating plate (72) and the inner energy-dissipating plate (71) of the diagonal brace. Step 6.5: Align the bolt holes of the connecting ear plates (10) bases on the upper and lower parts of the engineering bamboo beam (2) with the corresponding bolt holes on the flange of the H-shaped steel column (1), and use high-strength bolts (11) to fasten the connecting ear plates (10) to the H-shaped steel column (1); Step 6.6: Align the pin holes at both ends of the friction-type energy-dissipating diagonal brace (7) with the pin holes of the connecting ear plate (10) on the H-shaped steel column (1) and the engineering bamboo beam (2), and then insert the pin shaft (9). At this point, the installation of the prefabricated steel-bamboo hybrid frame friction energy-dissipating node is completed.

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