Inorganic glue composite bamboo anti-seismic beam-column joint with recoverable function and assembling method

Abstract

The invention belongs to the field of inorganic glue composite bamboo anti-seismic beam-column joints, and relates to an inorganic glue composite bamboo anti-seismic beam-column joint with a recoverable function and a splicing method, the inorganic glue composite bamboo anti-seismic beam-column joint is suitable for earthquake area engineering application, the inorganic glue composite bamboo anti-seismic beam-column joint is composed of an inorganic glue composite bamboo splicing beam, an inorganic glue composite bamboo column and a connecting piece, and compression-resistant steel plates are arranged on the two sides of the inorganic glue composite bamboo column; an upper energy consumption angle steel and a lower energy consumption angle steel are fixed on each compression-resistant steel plate; an inorganic glue composite bamboo splicing beam is fixed between the upper energy consumption angle steel and the lower energy consumption angle steel; the inorganic glue composite bamboo splicing beam on each side is formed by splicing two inorganic glue composite bamboo single-section beams arranged up and down and a shear-resistant connecting steel plate located between the two inorganic glue composite bamboo single-section beams. The prestressed tendons penetrate through circular holes in the shear-resistant connecting steel plates, penetrate through the inorganic glue composite bamboo columns and are anchored to the beam ends of the inorganic glue composite bamboo splicing beams on the other sides; friction dampers are arranged on the energy dissipation angle steel and connected with the ends of the inorganic glue composite bamboo splicing beams.

Description

Technical Field

[0001] The invention mainly belongs to the field of inorganic glue composite bamboo earthquake-resistant beam-column nodes, and relates to an inorganic glue composite bamboo earthquake-resistant beam-column node with a restorable function and an assembling method. Background Art

[0002] As a new type of bamboo-based inorganic adhesive bonded biomass material, inorganic adhesive composite bamboo material has broad application prospects due to its excellent mechanical properties and environmentally friendly characteristics.

[0003] Traditional inorganic adhesive composite bamboo beam-column nodes are mostly connected by steel filler plates-bolts, and organic adhesive is poured at the connection position to form a rigid node, and its post-earthquake recoverability is facing challenges. In the invention patent with patent publication number CN103243820A, a recoverable prefabricated beam-column node that can be applied to the field of building structure technology is proposed. Its core idea relies on prefabricated reinforced concrete beam-column components, pre-tensioned prestressed tendons are preset in the beam, and the rigid connection at the node is disconnected to convert into a semi-rigid connection. In addition, tensioned prestressed tendons or energy-absorbing shock-absorbing components are set in the node area, so that the node undergoes controllable deformation within a certain range under the action of loads such as earthquakes, but after the load disappears, it can rely on the prestressed or elastic recovery mechanism in the design to automatically return to a position close to the original position, thereby realizing the self-reset ability of the structure after the earthquake. This design concept not only improves the seismic performance of the structure, but also significantly reduces the cost of post-disaster maintenance, providing an important reference for the toughness design of modern building structures and a new technical approach to improving the seismic performance of bamboo and wood structures.

[0004] The invention patent with the patent publication number CN113006279A discloses a connection node between beams and columns in an inorganic adhesive composite bamboo-wood structure, a frame structure and a method, which has good node stiffness and integrity, but still faces the following problems: 1) Inorganic adhesive composite bamboo beam-column nodes are mostly connected by steel filler plates and bolts, and organic adhesive is added to ensure the rigidity of the nodes. However, this leads to a significant decrease in the deformation capacity of the nodes.

[0005] 2) The inorganic adhesive composite bamboo beam-column joints often suffer from transverse splitting failure at the beam ends under earthquake action, which is a brittle failure mode with strong unpredictability and poor seismic effect; 3) In the inorganic adhesive composite bamboo beam-column joint, under the action of earthquake, the column surface is often squeezed by the beam end and locally compressed and damaged, which cannot be repaired. Summary of the invention

[0006] In order to solve the technical problems existing in the prior art, the present invention discloses an inorganic adhesive composite bamboo earthquake-resistant beam-column node with a restorable function and an assembling method.

[0007] In order to achieve the above object, the technical solution of the present invention is: In the first aspect, the present invention provides an inorganic adhesive composite bamboo seismic beam-column node with a restorable function, which is composed of an inorganic adhesive composite bamboo spliced ​​beam, a shear-resistant connecting steel plate, a compression steel plate, an inorganic adhesive composite bamboo column, an energy-absorbing angle steel, a friction damper, a prestressed tendon and an anchor. Compression steel plates are arranged on both sides of the inorganic adhesive composite bamboo column, and an upper energy-absorbing angle steel and a lower energy-absorbing angle steel are fixed on each compression steel plate; the inorganic adhesive composite bamboo spliced ​​beam is fixed between the upper energy-absorbing angle steel and the lower energy-absorbing angle steel; the inorganic adhesive composite bamboo spliced ​​beam on each side is spliced ​​by two inorganic adhesive composite bamboo single-section beams arranged upper and lower and a shear-resistant connecting steel plate located between the two inorganic adhesive composite bamboo single-section beams, and the prestressed tendon passes through the internal circular hole of the shear-resistant connecting steel plate, penetrates the inorganic adhesive composite bamboo column and is anchored to the beam end of the inorganic adhesive composite bamboo spliced ​​beam on the other side; and a friction damper is arranged on the energy-absorbing angle steel, and the friction damper is connected to the end of the inorganic adhesive composite bamboo spliced ​​beam. Under the action of earthquake, the inorganic adhesive composite bamboo beam ends are bent and opened, the energy-absorbing angle steel at the beam ends fatigue yields and the friction damper dissipates the earthquake energy, and the prestressed tendons are within the elastic range to provide self-reset capability for the node. After the earthquake ends, the energy-absorbing angle steel is replaced and the inorganic adhesive composite bamboo beam-column node can continue to be used.

[0008] As a further technical solution, the friction damper includes a friction steel plate, the upper part of the friction steel plate passes through the upper energy dissipation angle steel, and is connected to the upper energy dissipation angle steel through screws and connecting plates; the middle part of the friction steel plate passes through the inorganic glue composite bamboo single-section beam and is welded to the shear-resistant connecting steel plate; the lower part of the friction steel plate passes through the lower energy dissipation angle steel, and is connected to the lower energy dissipation angle steel through screws and connecting plates.

[0009] As a further technical solution, the first connecting plate and the second connecting plate are vertically welded on the upper energy-absorbing angle steel; and an elliptical hole is set on the first connecting plate and the second connecting plate; the upper part of the friction steel plate passes through the upper energy-absorbing angle steel and is inserted between the first connecting plate and the second connecting plate, and the first threaded rod and the second threaded rod pass through the first connecting plate, the friction steel plate and the second connecting plate in turn, and the two ends are fastened by nuts. As a further technical solution, the third connecting plate and the fourth connecting plate are vertically welded on the lower energy-absorbing angle steel; the lower part of the friction steel plate passes through the lower energy-absorbing angle steel and is inserted between the third connecting plate and the fourth connecting plate; the third threaded rod and the fourth threaded rod pass through the third connecting plate, the friction steel plate and the fourth connecting plate in turn, and the two ends are fastened by nuts.

[0010] As a further technical solution, the upper energy dissipation angle steel and the lower energy dissipation angle steel are both L-shaped angle steels, which are connected to the compression steel plate and the inorganic adhesive composite bamboo column by bolts; Furthermore, along the length direction of the shear connection steel plate, a hole with a diameter sufficient to pull the unbonded prestressed material is left inside the shear connection steel plate, and cylindrical metal shear keys with equal diameter and height are evenly distributed on both sides of the steel plate.

[0011] Furthermore, an insertion hole cooperating with the shear key is arranged on the inorganic adhesive composite bamboo single-section beam.

[0012] Furthermore, the prestressed tendons are one of prestressed steel strands, prestressed stainless steel tendons, carbon fiber tendons, and PBO fiber tendons.

[0013] Furthermore, the cross-sections of the inorganic adhesive composite bamboo spliced ​​beams and inorganic adhesive composite bamboo columns are both square or rectangular.

[0014] Furthermore, the splicing interface of the inorganic adhesive composite bamboo splicing beam is bonded with organic adhesive such as epoxy resin.

[0015] Furthermore, the energy-absorbing steel boots at the beam ends are made of seismic-resistant soft steel and are mechanically connected by bolts.

[0016] Furthermore, the anchor used is a wedge-shaped anchor with a conical structure, and a locking effect is produced by mutual compression between the cone and the anchor body.

[0017] In the second aspect, the present invention provides an assembly method of the inorganic glue composite bamboo seismic beam-column node with a restorable function based on the above-mentioned inorganic glue composite bamboo seismic beam-column node with a restorable function, as follows: Step 1, welding the friction steel plate to the shear connection steel plate to form a whole; passing the reserved holes of the first inorganic glue composite bamboo single-section beam and the second inorganic glue composite bamboo single-section beam through the friction steel plate respectively, and clamping them on the shear key of the shear connection steel plate, and bonding and fixing them with epoxy resin organic glue; after the organic glue is fully dried and cured, a complete structure is formed; Step 2: Connect the compression steel plate through the inorganic adhesive composite bamboo column by screws; Step 3, pass the upper energy dissipation angle steel through the friction steel plate and place it on the first inorganic adhesive composite bamboo single-segment beam, then place the first connecting plate and the second connecting plate on both sides of the upper part of the friction steel plate respectively, and connect them tightly through the first threaded rod and the second threaded rod; Pass the lower energy dissipation angle steel through the friction steel plate and place it on the second inorganic adhesive composite bamboo single-segment beam, then place the third connecting plate and the fourth connecting plate on both sides of the lower part of the friction steel plate respectively, and connect them tightly through the third threaded rod and the fourth threaded rod; Step 4: Connect the assembled friction damper, shear-resistant connecting steel plate and inorganic adhesive composite bamboo beam to the screw that previously passed through the inorganic adhesive composite bamboo column and the compression steel plate, and then tighten the nut to ensure a stable connection; Step 5, according to Step 1 to Step 4, the friction damper, the shear connection steel plate and the third inorganic adhesive composite bamboo single-section beam and the second inorganic adhesive composite bamboo single-section beam on the other side are butt-jointed and installed; Step 6. After both sides are accurately connected, the prestressed tendons are passed through the holes inside the shear-resistant connecting steel plate and through the inorganic adhesive composite bamboo column. After extending out at the other end, both ends are fixed with anchors; finally, the prestressed tendons are post-tensioned to ensure the reliability of the overall structure.

[0018] The beneficial effects of the present invention are as follows: When a node is subjected to a horizontal earthquake, the seismic force is transmitted to the node through the beams and columns, and the components in the node start up in sequence and work together to form a highly efficient earthquake-resistant and self-reset system. 1. After the horizontal earthquake force is transmitted to the node, it first causes deformation in the node area. The energy-absorbing angle steel responds quickly through its own plastic deformation, dissipating the earthquake force and converting it into plastic energy dissipation. This process effectively reduces the stress concentration at the beam-column connection and reduces the initial deformation amplitude of the structure. Then, the friction damper begins to slip, further dissipating the seismic energy and at the same time alleviating the impact of the angle steel deformation on the core part of the node. This front-to-back energy dissipation mechanism not only prolongs the duration of energy dissipation, but also provides stable conditions for subsequent reset.

[0019] 2. While the energy dissipation system is functioning, the tensioning effect of the prestressed tendons gradually emerges. The prestressed tendons enhance the overall stiffness of the node through the initial constraint force, enabling the node to effectively control deformation under the action of horizontal seismic forces. At the same time, the constraint force of the prestressed tendons in turn provides a more stable deformation environment for the energy dissipation angle steel and friction damper, avoiding failure of both due to excessive deformation. Through the combination of rigidity and flexibility, the node can absorb seismic energy while maintaining a certain elastic deformation capacity, thereby achieving a balance between safety and adaptability.

[0020] 3. As the energy dissipation of the node is gradually completed, the prestressed tendons begin to dominate the reset process. After the seismic force ends, the energy-absorbing angle steel and the friction damper gradually return to their initial state, while the elastic reset force of the prestressed tendons quickly takes effect, pulling the node back to its original position from the residual deformation state. This dynamic alternation not only ensures the adequacy of node energy dissipation, but also achieves efficient reset after the earthquake, greatly improving the recoverability of the structure.

[0021] 4. The collaborative working ability of each component during the stress process of the node is maintained throughout: the energy-absorbing angle steel alleviates the initial impact force through plastic energy dissipation, the friction damper absorbs the excess energy immediately afterwards, and the prestressed tendons provide rigidity guarantee throughout the process and complete the node reset function in the final stage. This clear division of labor and interdependent synergy ensures the comprehensive advantages of the node in seismic performance and reflects the systematic and advanced nature of the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a structural schematic diagram of the inorganic adhesive composite bamboo seismic beam-column node assembly state with restorable function proposed by the present invention: Figure 2 This is a schematic diagram of the explosion state of the inorganic adhesive composite bamboo seismic beam-column node with recoverable function proposed by the present invention: Figure 3 It is a structural schematic diagram of the friction damper part of the self-resetting inorganic adhesive composite bamboo beam column of the present invention; Numbers in the figure: 1-1. The first inorganic glue composite bamboo single-segment beam, 1-2. The second inorganic glue composite bamboo single-segment beam, 1-3. The third inorganic glue composite bamboo single-segment beam, 1-4. The fourth inorganic glue composite bamboo single-segment beam, 2. Inorganic glue composite bamboo column, 3-1. Upper energy dissipation angle steel, 3-2. Lower energy dissipation angle steel, 4. Friction damper, 4-1. The first connecting plate, 4-2. The second connecting plate, 4-3. The third connecting plate, 4-4. The fourth connecting plate, 4-5. The first threaded rod, 4-6. The second threaded rod, 4-7. The third threaded rod, 4-8. The fourth threaded rod, 4-9. Friction steel plate, 5. Compression steel plate, 6. Shear connection steel plate, 7. Anchor, 8. Prestressed tendons, 9. Shear key, 10. Reserved hole; DETAILED DESCRIPTION The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] The present embodiment provides an inorganic adhesive composite bamboo seismic beam-column node with a restorable function, which is composed of an inorganic adhesive composite bamboo spliced ​​beam, an inorganic adhesive composite bamboo column, an energy-absorbing steel boot at the beam end, a node reinforcement steel sleeve, prestressed tendons, a PVC prestressed pipe and an anchor. The inorganic adhesive composite bamboo spliced ​​beam is arranged on both sides of the inorganic adhesive composite bamboo column; the inorganic adhesive composite bamboo spliced ​​beam on each side is formed by splicing two inorganic adhesive composite bamboo single-section beams, and a PVC prestressed pipe is pre-grooved inside to bury the PVC prestressed pipe. After the single sections are vertically spliced, an integral part is formed by inserting the energy-absorbing steel boot at the beam end, and the node reinforcement sleeve and the energy-absorbing steel boot at the beam end are connected to the inorganic adhesive composite bamboo column by bolts to form a whole. The prestressed steel strand passes through the PVC prestressed pipe from one end of the inorganic adhesive composite bamboo beam and is fixed to the other end of the inorganic adhesive composite bamboo beam, and is anchored by an anchor.

[0024] Under the action of earthquake, the inorganic adhesive composite bamboo beam ends are bent and opened, the energy-absorbing steel boots at the beam ends fatigue and yield to dissipate the earthquake energy, and the prestressed tendons are in the elastic range to provide self-reset capability for the nodes. After the earthquake ends, the inorganic adhesive composite bamboo beam-column node can continue to be used by replacing the energy-absorbing steel boots.

[0025] Embodiment 1: like Figure 1 , Figure 2 , Figure 3As shown, it is a self-resetting inorganic adhesive composite bamboo structure beam-column cross-shaped node, including an inorganic adhesive composite bamboo single-section beam, an inorganic adhesive composite bamboo column 2, an upper energy dissipation angle steel 3-1, a lower energy dissipation angle steel 3-2, a friction damper 4, a compression steel plate 5, a shear connection steel plate 6, an anchor 7, a prestressed tendon 8, and a shear key 9. The inorganic adhesive composite bamboo single section and the inorganic adhesive composite bamboo column 2 are bolted together through the beam end energy dissipation angle steel and the friction damper, and the prestressed tendon 8 longitudinally penetrates the shear connection steel plate 6 and is fixed to both sides of the inorganic adhesive composite bamboo spliced ​​beam through the anchor 7.

[0026] Specifically, compression steel plates 5 are fixed on both sides of the inorganic glue composite bamboo column 2, an upper energy dissipation angle steel 3-1 and a lower energy dissipation angle steel 3-2 are fixed on the compression steel plate 5, a friction damper 4 is fixed on the upper energy dissipation angle steel 3-1 and the lower energy dissipation angle steel 3-2, both ends of the shear connection steel plate 6 pass through the inorganic glue composite bamboo column 2 and extend to a distance outside the inorganic glue composite bamboo column 2, and a first inorganic glue composite bamboo single-section beam 1-1 and a second inorganic glue composite bamboo single-section beam 1-2 are arranged on the top of the shear connection steel plate 6; the shear connection steel plate 6 The third inorganic adhesive composite bamboo single-section beam 1-3 and the fourth inorganic adhesive composite bamboo single-section beam 1-4 are arranged at the bottom; a plurality of shear keys 9 are welded at the top and bottom of the shear connection steel plate 6, and the shear keys 9 are inserted at the bottom of the first inorganic adhesive composite bamboo single-section beam 1-1, the second inorganic adhesive composite bamboo single-section beam 1-2, the third inorganic adhesive composite bamboo single-section beam 1-3, and the fourth inorganic adhesive composite bamboo single-section beam 1-4; and prestressed tendons 8 are also passed through along the length direction of the shear connection steel plate 6, and the two ends of the prestressed tendons 8 are anchored by anchors 7. The above-mentioned self-resetting inorganic adhesive composite bamboo structure beam-column cross-shaped node is composed of a self-resetting system, a protective device and an energy dissipation device. The present invention arranges prestressed tendons 8 as a self-resetting system, and arranges soft steel energy dissipation angle steel and friction damper as an energy dissipation system. The present invention arranges energy dissipation angle steel at the node, which serves to dissipate the energy of the inorganic adhesive composite bamboo column 2 under the action of an earthquake. The present invention sets a friction damper at the beam end, which also serves to dissipate the energy of the inorganic adhesive composite bamboo column 2 under earthquake action. The prestressed tendons 8 are tied in the inorganic adhesive composite bamboo beam-column node, which has one function of increasing the overall stiffness of the structure and another function of keeping the prestressed tendons 8 in the elastic stage under medium and large earthquakes, providing self-resetting performance at the epicenter and eliminating residual deformation of the node.

[0027] Furthermore, the upper energy dissipation angle steel 3-1 and the lower energy dissipation angle steel 3-2 are both L-shaped angle steels, which are connected to the compression steel plate 5 and the inorganic adhesive composite bamboo column 2 by bolts; Furthermore, a through hole with a diameter sufficient to pull the unbonded prestressed material is left inside the shear connection steel plate 6, and cylindrical metal shear keys with equal diameter and height are evenly distributed on both sides of the steel plate.

[0028] Furthermore, the friction damper 4 includes a first connecting plate 4-1, a second connecting plate 4-2, a third connecting plate 4-3, a fourth connecting plate 4-4, a first threaded rod 4-5, a second threaded rod 4-6, a third threaded rod 4-7, a fourth threaded rod 4-8, and a friction steel plate 4-9; the first connecting plate 4-1 and the second connecting plate 4-2 are vertically welded on the upper energy dissipation angle steel 3-1; the third connecting plate 4-3 and the fourth connecting plate 4-4 are also vertically welded on the lower energy dissipation angle steel 3-2; and an elliptical hole is set on the first connecting plate 4-1 and the second connecting plate 4-2; the upper part of the friction steel plate 4-9 passes through the upper energy dissipation angle steel 3-1. The angle steel 3-1 is inserted between the first connecting plate 4-1 and the second connecting plate 4-2, and the middle part passes through the inorganic glue composite bamboo single-section beam and is welded to the shear-resistant connecting steel plate 6; the lower part passes through the lower energy-absorbing angle steel 3-2, and is inserted between the third connecting plate 4-3 and the fourth connecting plate 4-4, and the first threaded rod 4-5 and the second threaded rod 4-6 pass through the first connecting plate 4-1, the friction steel plate 4-9, and the second connecting plate 4-2 in turn, and the two ends are fastened by nuts; and the third threaded rod 4-7 and the fourth threaded rod 4-8 pass through the third connecting plate 4-3, the friction steel plate 4-9, and the fourth connecting plate 4-4 in turn, and the two ends are fastened by nuts.

[0029] Furthermore, insertion holes cooperating with the shear key 9 are set at the bottom of the first inorganic glue composite bamboo single-section beam 1-1 and the second inorganic glue composite bamboo single-section beam 1-2; insertion holes cooperating with the shear key 9 are set at the top of the third inorganic glue composite bamboo single-section beam 1-3 and the fourth inorganic glue composite bamboo single-section beam 1-4.

[0030] Furthermore, one end of the first inorganic glue composite bamboo single-section beam 1-1, the second inorganic glue composite bamboo single-section beam 1-2, the third inorganic glue composite bamboo single-section beam 1-3, and the fourth inorganic glue composite bamboo single-section beam 1-4 are all provided with a reserved hole 10 for the friction steel plate 4-9 to pass through; the reserved holes 10 on the first inorganic glue composite bamboo single-section beam 1-1 and the third inorganic glue composite bamboo single-section beam 1-3 are coaxially aligned up and down; the reserved holes 10 on the second inorganic glue composite bamboo single-section beam 1-2 and the fourth inorganic glue composite bamboo single-section beam 1-4 are coaxially aligned up and down.

[0031] Furthermore, the materials used for the first inorganic adhesive composite bamboo single-section beam 1-1, the second inorganic adhesive composite bamboo single-section beam 1-2, the third inorganic adhesive composite bamboo single-section beam 1-3, the fourth inorganic adhesive composite bamboo single-section beam 1-4 and the inorganic adhesive composite bamboo column 2 are all bamboo-based inorganic adhesive-bonded composite biomass materials.

[0032] Furthermore, the cross-sections of the first inorganic glue composite bamboo single-section beam 1-1, the second inorganic glue composite bamboo single-section beam 1-2, the third inorganic glue composite bamboo single-section beam 1-3, the fourth inorganic glue composite bamboo single-section beam 1-4 and the inorganic glue composite bamboo column 2 are all square or rectangular.

[0033] Furthermore, the splicing interface of the inorganic adhesive composite bamboo single-end beam is bonded with organic adhesive such as epoxy resin.

[0034] Furthermore, the upper energy dissipation angle steel 3-1 and the lower energy dissipation angle steel 3-2 are made of earthquake-resistant soft steel and are mechanically connected by bolts.

[0035] Furthermore, the prestressed tendons 8 are one of prestressed steel strands, prestressed stainless steel tendons, carbon fiber tendons, and PBO fiber tendons.

[0036] Furthermore, the anchor 7 is a wedge-shaped anchor, which adopts a conical structure and produces a locking effect through the mutual compression between the cone and the anchor body.

[0037] Furthermore, the self-resetting inorganic adhesive composite bamboo structure beam-column cross-shaped node assembly method of the present invention is as follows: Step 1: Steel plate welding and beam segment bonding Weld the friction steel plate 4-9 to the shear connection steel plate 6 to form a whole; pass the reserved holes 10 of the first inorganic glue composite bamboo single-section beam 1-1 and the second inorganic glue composite bamboo single-section beam 1-2 through the friction steel plate 4-9 respectively, and clamp them on the shear key 9 of the shear connection steel plate 6, and fix them with epoxy resin organic glue. After the organic glue is fully dried and cured, a complete structure is formed; Step 2: Connect the compression steel plate 5 to the bamboo column The compression steel plate 5 is connected by passing the inorganic adhesive composite bamboo column 2 through the screw rod. At this time, only the screw rod is passed through without tightening the nut.

[0038] Step 3: Energy dissipation angle steel installation The upper energy dissipation angle steel 3-1 is passed through the friction steel plate 4-9 and placed on the first inorganic adhesive composite bamboo single-segment beam 1-1, and then the first connecting plate 4-1 and the second connecting plate 4-2 are respectively placed on both sides of the friction steel plate 4-9, and they are tightly connected by the first threaded rod 4-5 and the second threaded rod 4-6; Pass the lower energy dissipation angle steel 3-2 through the friction steel plate 4-9 and place it on the second inorganic adhesive composite bamboo single-segment beam 1-2, then place the third connecting plate 4-3 and the fourth connecting plate 4-4 on both sides of the friction steel plate 4-9 respectively, and connect them tightly through the third threaded rod 4-7 and the fourth threaded rod 4-8; Step 4: Friction damper docking Connect the assembled friction damper 4, shear-resistant connecting steel plate 6 and inorganic adhesive composite bamboo beam as a whole to the screw rod that previously passed through the inorganic adhesive composite bamboo column 2 and the compression steel plate 5. The screw rod needs to be numbered for identification, and then tighten the nut to ensure a stable connection.

[0039] Step 5, according to the steps 1-4, the friction damper 4, the shear connection steel plate 6 and the third inorganic adhesive composite bamboo single-section beam 1-3 and the second inorganic adhesive composite bamboo single-section beam 1-2 on the other side are butt-jointed and installed; Step 6: Installation and tensioning of prestressed tendons 8 After both sides are accurately butted, the prestressed tendons 8 are passed through the hole inside the shear connection steel plate 6 and through the inorganic adhesive composite bamboo column 2. After extending out at the other end, both ends are fixed with anchors 7. Finally, the prestressed tendons 8 are post-tensioned to ensure the reliability of the overall structure.

[0040] The working principle of the present invention is: When a node is subjected to a horizontal earthquake, the seismic force is transmitted to the node through the beams and columns. The components in the node start up in sequence and work together to form a highly efficient earthquake-resistant and self-reset system, as follows: After the horizontal earthquake force is transmitted to the node, it first causes deformation in the node area. The energy-absorbing angle steel responds quickly through its own plastic deformation, dissipating the earthquake force and converting it into plastic energy dissipation. This process effectively alleviates the stress concentration at the beam-column connection and reduces the initial deformation amplitude of the structure. Then, the friction damper begins to slip, further dissipating the seismic energy and at the same time alleviating the impact of the angle steel deformation on the core part of the node. This front-to-back energy dissipation mechanism not only prolongs the duration of energy dissipation, but also provides stable conditions for subsequent reset.

[0041] While the energy dissipation system is functioning, the tensioning effect of the prestressed tendons 8 gradually emerges. The prestressed tendons 8 enhance the overall stiffness of the node through the restraining force initially applied, enabling the node to effectively control deformation under the action of horizontal seismic forces. At the same time, the restraining force of the prestressed tendons 8 in turn provides a more stable deformation environment for the energy dissipation angle steel and the friction damper, preventing the failure of both due to excessive deformation. Through a combination of rigidity and flexibility, the node can absorb seismic energy while maintaining a certain elastic deformation capacity, thereby achieving a balance between safety and adaptability.

[0042] As the node energy dissipation is gradually completed, the prestressed tendons 8 begin to dominate the reset process. After the earthquake force ends, the energy-absorbing angle steel and the friction damper gradually return to their initial state, while the elastic reset force of the prestressed tendons 8 quickly takes effect, pulling the node back to its original position from the residual deformation state. This dynamic alternation not only ensures the adequacy of node energy dissipation, but also achieves efficient reset after the earthquake, greatly improving the recoverability of the structure.

[0043] The collaborative working ability of each component during the stress process of the node is maintained throughout: the energy-absorbing angle steel alleviates the initial impact force through plastic energy dissipation, the friction damper absorbs the excess energy immediately afterwards, and the prestressed tendons 8 provide stiffness guarantee throughout the process and complete the node reset function in the final stage. This clear division of labor and interdependent synergy ensures the comprehensive advantages of the node in seismic performance and reflects the systematic and advanced nature of the design.

Claims

1. The inorganic adhesive composite bamboo seismic beam-column node with restorable function is characterized by: It consists of an inorganic adhesive composite bamboo spliced ​​beam, a shear-resistant connecting steel plate, a compression steel plate, an inorganic adhesive composite bamboo column, an energy-absorbing angle steel, a friction damper, a prestressed tendon and an anchor. Compression steel plates are arranged on both sides of the inorganic adhesive composite bamboo column, and an upper energy-absorbing angle steel and a lower energy-absorbing angle steel are fixed on each compression steel plate; the inorganic adhesive composite bamboo spliced ​​beam is fixed between the upper energy-absorbing angle steel and the lower energy-absorbing angle steel; the inorganic adhesive composite bamboo spliced ​​beam on each side is spliced ​​by two inorganic adhesive composite bamboo single-section beams arranged up and down and a shear-resistant connecting steel plate located between the two inorganic adhesive composite bamboo single-section beams, and the prestressed tendon passes through the internal circular hole of the shear-resistant connecting steel plate, penetrates the inorganic adhesive composite bamboo column and is anchored to the beam end of the inorganic adhesive composite bamboo spliced ​​beam on the other side; and a friction damper is arranged on the energy-absorbing angle steel, and the friction damper is connected to the end of the inorganic adhesive composite bamboo spliced ​​beam.

2. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The friction damper comprises a friction steel plate, the upper part of which passes through an upper energy-dissipating angle steel and is connected to the upper energy-dissipating angle steel through a screw rod and a connecting plate; the middle part of the friction steel plate passes through an inorganic adhesive composite bamboo single-section beam and is welded to a shear-resistant connecting steel plate; the lower part of the friction steel plate passes through a lower energy-dissipating angle steel and is connected to the lower energy-dissipating angle steel through a screw rod and a connecting plate.

3. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The first connecting plate and the second connecting plate are vertically welded on the upper energy-absorbing angle steel; and an elliptical hole is set on the first connecting plate and the second connecting plate; the upper part of the friction steel plate passes through the upper energy-absorbing angle steel and is inserted between the first connecting plate and the second connecting plate, and the first threaded rod and the second threaded rod pass through the first connecting plate, the friction steel plate and the second connecting plate in turn, and the two ends are fastened by nuts.

4. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The third connecting plate and the fourth connecting plate are vertically welded on the lower energy-absorbing angle steel; the lower part of the friction steel plate passes through the lower energy-absorbing angle steel and is inserted between the third connecting plate and the fourth connecting plate; the third threaded rod and the fourth threaded rod pass through the third connecting plate, the friction steel plate and the fourth connecting plate in turn, and the two ends are fastened by nuts.

5. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The upper energy dissipation angle steel and the lower energy dissipation angle steel are both L-shaped angle steels, which are connected to the compression steel plate and the inorganic adhesive composite bamboo column by bolts.

6. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: Along the length direction of the shear connection steel plate, a hole with a diameter sufficient to pull the unbonded prestressing is left inside the shear connection steel plate, and cylindrical metal shear keys with equal diameter and height are evenly distributed on both sides of the steel plate.

7. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: An inserting hole matched with the shear key is arranged on the inorganic glue composite bamboo single-section beam.

8. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The prestressed tendons are one of prestressed steel strands, prestressed stainless steel tendons, carbon fiber tendons, and PBO fiber tendons.

9. The inorganic adhesive composite bamboo seismic beam-column node with restorable function as claimed in claim 1, characterized in that: The cross sections of the inorganic adhesive composite bamboo splicing beams and inorganic adhesive composite bamboo columns are both square or rectangular.

10. The method for assembling the inorganic adhesive composite bamboo seismic beam-column node with restorable function according to any one of claims 2 to 9, characterized in that: as follows: Step 1, welding the friction steel plate to the shear connection steel plate to form a whole; passing the reserved holes of the first inorganic glue composite bamboo single-section beam and the second inorganic glue composite bamboo single-section beam through the friction steel plate respectively, and clamping them on the shear key of the shear connection steel plate, and bonding and fixing them with epoxy resin organic glue; after the organic glue is fully dried and cured, a complete structure is formed; Step 2: Connect the compression steel plate through the inorganic adhesive composite bamboo column by screws; Step 3, pass the upper energy dissipation angle steel through the friction steel plate and place it on the first inorganic adhesive composite bamboo single-segment beam, then place the first connecting plate and the second connecting plate on both sides of the upper part of the friction steel plate respectively, and connect them tightly through the first threaded rod and the second threaded rod; Pass the lower energy dissipation angle steel through the friction steel plate and place it on the second inorganic adhesive composite bamboo single-segment beam, then place the third connecting plate and the fourth connecting plate on both sides of the lower part of the friction steel plate respectively, and connect them tightly through the third threaded rod and the fourth threaded rod; Step 4: Connect the assembled friction damper, shear-resistant connecting steel plate and inorganic adhesive composite bamboo beam to the screw that previously passed through the inorganic adhesive composite bamboo column and the compression steel plate, and then tighten the nut to ensure a stable connection; Step 5, according to Step 1 to Step 4, the friction damper, the shear connection steel plate and the third inorganic adhesive composite bamboo single-section beam and the second inorganic adhesive composite bamboo single-section beam on the other side are butt-jointed and installed; Step 6. After both sides are accurately connected, the prestressed tendons are passed through the holes inside the shear-resistant connecting steel plate and through the inorganic adhesive composite bamboo column. After extending out at the other end, both ends are fixed with anchors; finally, the prestressed tendons are post-tensioned to ensure the reliability of the overall structure.

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