Fabricated beam-column joint damping structure and construction method

Abstract

The application discloses an assembled beam-column joint damping structure and a construction method, the joint comprises a vertical damping structure, a horizontal damping structure and an oblique damping structure; the vertical damping structure comprises a joint upper cylinder, a middle part of the joint upper cylinder is hingedly connected with a connecting rod assembly, a lower end of the connecting rod assembly is elastically connected with a joint lower cylinder in a horizontal direction, a plurality of vertical sliding rods are arranged on the front side and the rear side of the connecting rod assembly, and the lower ends of the vertical sliding rods are elastically connected with the joint lower cylinder in a vertical direction; the horizontal damping structure is symmetrically distributed on the left side and the right side of the joint lower cylinder after penetrating the joint lower cylinder; the structure is connected and combined with the beam and the column through the setting of the energy dissipation component, so that the damping and energy dissipation effect is achieved; under the action of the earthquake, the damping structure can offset a certain amount of seismic energy through the mutual restriction of the deformation, the vertical displacement and the horizontal displacement of the component itself, and the influence of the earthquake on the structure is reduced.

Description

Technical Field

[0001] This invention relates to the field of building technology, specifically to a prefabricated beam-column joint vibration reduction structure and its construction method. Background Technology

[0002] Structural energy dissipation and vibration reduction technology involves installing energy-dissipating devices, such as dampers and components, at certain locations within a structure. These devices dissipate or absorb seismic energy input into the structure through energy-dissipating elasto-plastic (or viscoelastic) hysteretic deformation, thereby reducing the seismic response of the main structure and preventing structural damage or collapse. This achieves the goal of seismic mitigation and earthquake resistance, making it an effective engineering vibration reduction technology. Research shows that the proper placement of vibration reduction devices at beam-column joints can effectively protect buildings, thus ensuring and maintaining the safety of people's lives and property to a certain extent.

[0003] Existing seismic isolation structures also use simple buffer devices (springs, simple buffer devices), which only buffer the horizontal or vertical force of a single earthquake. Such structures cannot effectively handle other seismic forces and are prone to damage, leading to structural failure. Therefore, a reliable, economical, and well-suited prefabricated beam-column joint connection method that can effectively handle seismic forces is urgently needed. Summary of the Invention

[0004] To address the aforementioned problems, this invention discloses a prefabricated beam-column joint vibration reduction structure and construction method. This structure connects and combines beams and columns by setting energy-dissipating components to achieve the effect of vibration reduction and energy dissipation. Under earthquake action, this vibration reduction structure can offset a certain amount of earthquake energy through the deformation of the components themselves and the mutual restraint of vertical and horizontal displacements, thereby reducing the impact of earthquakes on the structure.

[0005] A prefabricated beam-column joint damping structure includes a vertical damping structure, a horizontal damping structure, and an oblique damping structure;

[0006] The vertical damping structure includes an upper cylinder at the node, a connecting rod assembly is hinged to the middle part of the upper cylinder at the node, the lower end of the connecting rod assembly is elastically connected to the lower cylinder at the node in the horizontal direction, and multiple vertical slide rods are provided on the front and rear sides of the connecting rod assembly. The upper end of the vertical slide rod is connected to the upper cylinder at the node, and the lower end of the vertical slide rod is elastically connected to the lower cylinder at the node in the vertical direction.

[0007] The transverse damping structure penetrates the lower cylinder of the node and is symmetrically distributed on the left and right sides of the lower cylinder of the node.

[0008] The inclined damping structure is installed between the reinforced concrete column and the reinforced concrete beam.

[0009] Preferably, the transverse damping structure includes at least two transverse slide rods symmetrically distributed front and rear. Each transverse slide rod passes through the upper or lower cylinder of the node in both left and right directions. Each transverse slide rod is connected to a first irregular steel block at both ends. Each first irregular steel block is elastically connected to a first irregular grooved cylinder, which is embedded inside the reinforced concrete beam.

[0010] Preferably, a first transverse spring is provided between the first irregularly shaped steel block and the first irregularly shaped groove cylinder.

[0011] Preferably, two transverse sliding rods at the same height are connected by a second irregular steel block, and two first irregular groove cylinders at the same height are connected by a second irregular groove cylinder, with the second irregular steel block and the second irregular groove cylinder being interlocked.

[0012] Preferably, the transverse damping structure consists of two sets, which are symmetrically distributed on the upper and lower sides of the reinforced concrete beam.

[0013] Preferably, multiple grooves are provided on the sides of the reinforced concrete beams on both the left and right sides of the beam-column joint. The grooves on the reinforced concrete beams on both the left and right sides are symmetrically arranged about the beam-column joint, and a first irregular groove cylinder is installed in each groove.

[0014] Preferably, a vertical spring is connected below each vertical slide bar, and the other end of the vertical spring is connected to the cylinder body below the node.

[0015] Preferably, the connecting rod assembly consists of two connecting rods arranged in an inverted V shape between the upper cylinder and the lower cylinder of the node.

[0016] Preferably, the lower end of each connecting rod is connected to a second transverse spring on both its left and right sides, and the other end of the second transverse spring is connected to the side wall of the lower cylinder of the node.

[0017] Preferably, the inclined shock absorption structure includes a buffer inner cylinder, with a rubber filler inside the buffer inner cylinder, and a buffer outer cylinder slidably fitted outside the buffer inner cylinder.

[0018] Preferably, a guide structure is provided between the inner buffer cylinder and the outer buffer cylinder.

[0019] Preferably, the cross-section of the first irregular steel block is figure-eight shaped, and the inside of the first irregular groove cylinder is provided with a figure-eight shaped sliding groove that matches the shape of the first irregular steel block.

[0020] Preferably, a rubber buffer sleeve is provided between the transverse slide bar and the lower cylinder of the node.

[0021] Preferably, the left and right sides of the upper cylinder body and the lower cylinder body of the node are provided with protruding steel blocks, and the end of the reinforced concrete beam near the node is provided with a snap-fit ​​groove that matches the shape of the protruding steel blocks.

[0022] This invention also discloses a construction method for a prefabricated beam-column vibration reduction structure, the specific steps of which are as follows:

[0023] Step 1: Factory prefabrication of reinforced concrete columns, reinforced concrete left beams, vertical damping structures, horizontal damping structures, and diagonal damping structures;

[0024] Step 2: Assemble the various parts of the vertical damping structure and connect the horizontal damping structure with the vertical damping structure and the reinforced concrete beam;

[0025] Step 3: Connect the upper and lower ends of the vertical damping structure to the corresponding reinforced concrete columns, pour and cure the concrete, and then reinforce it with covering parts and screws.

[0026] Step 4: Seal the front and back of the reinforced concrete beam with steel plates, screws, and matching rivets;

[0027] Step 5: Install the inclined damping structure between the reinforced concrete column and the reinforced concrete beam.

[0028] Beneficial effects

[0029] 1. In this invention, the vertical damping structure primarily bears the vertical force of an earthquake. Energy dissipation through springs reduces the vertical force borne by the structure. The connecting rods and springs also function as buffers. The horizontal force of an earthquake is reduced by the transverse damping structure, which also limits the displacement range of the columns. The horizontal force of an earthquake, through the deformation of the beams compressing or stretching the springs in the irregularly shaped grooves of the transverse damping structure, also involves the compression of the rubber within the grooves, thus achieving the purpose of buffering and energy dissipation. The irregularly shaped protruding steel blocks on the sliding rods are used to fix the relative position of the grooves and the sliding rods, ensuring that the structural function does not fail. The springs in the irregularly shaped groove components also play an auxiliary role. The main purpose of these springs is to ensure that the collision between the irregularly shaped slider and the irregularly shaped groove is elastic, effectively protecting the components from damage.

[0030] 2. The protruding blocks are embedded in the precast grooves of the left and right concrete beams to prevent the intermediate nodes from dislodging during irregular deformation of the beams and columns under seismic loads. This would prevent structural failure of the intermediate nodes and subsequent instability of the entire structure. The connection between the intermediate nodes and the upper and lower columns is a rigid connection, which improves the overall structural integrity and enhances safety. The connection between the intermediate nodes and the beams is an elastic connection, but this does not affect the load-bearing capacity and improves the seismic performance of the structure.

[0031] 3. This prefabricated node connection method changes the traditional concrete beam-column node connection method and construction method. The core area of ​​the node, columns, beams and connectors can all be prefabricated in the factory and transported to the construction site. It can be mass-produced, ensuring the quality of components, and is suitable for rapid construction and large-scale promotion in cities and towns.

[0032] 4. This invention offers good material versatility. Given the complexity of building construction sites, the material selection for this structure can be appropriately adjusted. Recycled foamed concrete can be used in extremely hot regions, while recycled insulating concrete can be used in extremely cold regions, which can effectively improve the structural durability and long-term performance. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural diagram of the present invention;

[0035] Figure 2 This is a structural diagram after the concrete beam covering has been removed.

[0036] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0037] Figure 4 This is a diagram showing the connection between the transverse slide bar and the lower cylinder block at the node;

[0038] Figure 5 A sectional view showing the positional relationship between the transverse damping structure, the lower cylinder at the node, and the reinforced concrete beam;

[0039] Figure 6 This is a diagram of a transverse damping structure;

[0040] Figure 7 This is a structural diagram of the transverse sliding rod and the first and second irregularly shaped steel blocks;

[0041] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0042] Figure 9 Structural diagrams of the first and second irregular-shaped cylinders;

[0043] Figure 10 Vertical vibration damping structure cross section Figure 1 ;

[0044] Figure 11 Vertical vibration damping structure cross section Figure 2 ;

[0045] Figure 12 This is a structural diagram of the cylinder block after it has been inverted at the node;

[0046] Figure 13 This is a structural diagram of the cylinder block below the node;

[0047] Figure 14 Diagram of an oblique damping structure;

[0048] Figure 15 This is a structural diagram of the inner cylinder of the buffer system;

[0049] Figure 16 This is a structural diagram of the buffer outer cylinder;

[0050] In the diagram: 1—Reinforced concrete upper column; 2—Reinforced concrete lower column; 3—Reinforced concrete left beam; 4—Reinforced concrete right beam; 5—Upper column covering; 6—Lower column covering; 7—Concrete beam covering; 8—Upper slot; 9—Inner buffer cylinder; 10—Outer buffer cylinder; 11—Lower slot; 13—Protruding steel block; 14—Vertical spring; 15—First irregularly shaped cylinder; 16—First transverse spring; 17—First irregularly shaped steel block; 18—Vertical slide rod; 19—Transverse slide rod; 20—Slide rod protruding steel block; 21—Second irregularly shaped steel block; 22—Second irregularly shaped cylinder; 23—Second transverse spring; 24—Node upper cylinder; 25—Transverse cylinder; 26—Node lower cylinder; 30—Connecting flange; 31—Hinge seat; 32—Connecting rod assembly; 33—Spring baffle; 34—Vertical cylinder; 35—Transverse through hole; 36—Rubber buffer sleeve. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0052] In the description of this invention, it should be understood that the terms “inner,” “outer,” “left,” and “right” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] like Figure 1-16As shown, the present invention discloses a beam-column joint damping structure, which includes a vertical damping structure for connecting reinforced concrete columns, a horizontal damping structure for connecting reinforced concrete beams, and an oblique damping structure for simultaneously connecting reinforced concrete columns and reinforced concrete beams.

[0054] like Figure 10-13 As shown, the vertical damping structure includes an upper cylinder 24 and a lower cylinder 26. The upper cylinder has a hinge seat 31 in its middle section, which is hinged to a connecting rod assembly 32. This connecting rod assembly is an inverted V-shaped structure composed of two connecting rods. The upper apex of the inverted V-shape is hinged to the hinge seat 32. Each branch of the inverted V-shape has a second transverse spring 23 connected to its left and right sides at its lower end. The other end of each transverse spring is connected to the side wall of a transverse cylinder 25. The lower cylinder is divided into three parts from front to back. The middle part is divided into two transverse cylinders 25 distributed to the left and right, while the front and rear parts are divided into three vertical cylinders 34, one in the left, one in the middle, and one in the right. All cylinders have a closed lower section and an open upper section. On the lower surface of the cylinder body at the node, three vertical slide rods 18 arranged parallel to each other from left to right are connected to the front and rear sides of the hinge seat. The lower end of each vertical slide rod is connected to a vertical spring 14, and the lower end of the vertical spring is connected to the bottom of the corresponding vertical cylinder.

[0055] Both the upper and lower cylinder bodies at the node have transverse through holes 35 machined through the left and right sides of the cylinder body. Rubber buffer sleeves 36 are embedded in these transverse through holes. The transverse damping structure is connected to the left and right sides of the vertical damping structure through these rubber buffer sleeves, as detailed below:

[0056] like Figure 6-9 As shown, the transverse damping structure is divided into upper and lower groups. The upper transverse damping structure is connected to the upper cylinder body of the node, and the lower transverse damping structure is connected to the lower cylinder body of the node. Each group of transverse damping structures includes a transverse slide rod 19, a first irregularly shaped steel block 17, and a first irregularly shaped grooved cylinder 15. Each slide rod passes through the upper cylinder body 24 or the lower cylinder body 26 of the node on both sides. Both ends of each transverse slide rod protrude from the node cylinder body and are connected to a first irregularly shaped steel block 17. The cross-section of the first irregularly shaped steel block 17 is in the shape of the Arabic numeral 8. The diameter of the irregularly shaped steel block is larger than that of the transverse slide rod 19. Each first irregularly shaped steel block is connected to a first transverse spring 16 at both ends. The other end of the first transverse spring 16 is connected to the side wall of the first irregularly shaped grooved cylinder 15. The first irregularly shaped grooved cylinder 15 has an 8-shaped groove inside that matches the shape of the first irregularly shaped steel block. The first irregularly shaped grooved cylinder is embedded in the interior of the reinforced concrete beam.

[0057] Each transverse slide bar is connected to a slide bar protrusion steel block 20 on its side. At the same time, the protrusion steel blocks on the two transverse slide bars 19 that penetrate the cylinder body above or below the node are connected together by a second irregularly shaped steel block 21 running in a front-back direction. The second irregularly shaped steel block is a rectangular steel plate. Multiple grooves are provided on the upper and lower end faces of the rectangular steel plate. Two first irregularly shaped groove cylinders 15 at the same height are connected together by a second irregularly shaped groove cylinder 22. Multiple protrusions that cooperate with the grooves are provided on the upper and lower inner walls of the second irregularly shaped groove cylinder. The second irregularly shaped steel block 21 and the second irregularly shaped groove cylinder are connected to each other by inserting the grooves and protrusions.

[0058] like Figure 1 and Figures 14 to 16 As shown, the oblique damping structure includes a nested inner buffer cylinder 9 and an outer buffer cylinder 10. The inner buffer cylinder is a cylindrical structure with an open bottom, and its inner cavity is filled with rubber filler. A hexagonal inner cylinder insertion block is provided at the upper end of the cylindrical structure. The sidewalls of the inner buffer cylinder have a concave-convex structure. The outer buffer cylinder is a cylindrical structure with an open top, wherein the outer buffer cylinder has two layers of sidewalls connected at the bottom. The inner buffer cylinder is nested between the two layers of sidewalls. The inner sidewall of the outer layer and the outer sidewall of the inner layer are provided with a convex-concave structure that mates with the concave-convex structure.

[0059] The upper cylinder and lower cylinder of the node are provided with protruding steel blocks 13 on their left and right sides, and the reinforced concrete beam is provided with a snap-fit ​​groove that matches the shape of the protruding steel blocks at one end near the node.

[0060] This invention also discloses a construction method for a prefabricated beam-column vibration reduction structure, the specific steps of which are as follows:

[0061] Step 1: Prefabricate reinforced concrete upper column 1, reinforced concrete lower column 2, reinforced concrete left beam 3, and reinforced concrete right beam in the factory, and prefabricate vertical damping devices, horizontal damping devices, and diagonal damping devices. Prefabricate upper column cladding 5, lower column cladding 6, and concrete beam cladding 7. The concrete beam cladding consists of two channel steel pieces laterally installed on the front and rear sides of the concrete beam. The middle portion of the two flanges of the channel steel is machined to fit the notch of the concrete column. An upper slot 8 is welded to the lower end of the concrete beam cladding, and lower slots 11 are welded to both sides of the lower column cladding.

[0062] Step 2: Assemble the prefabricated upper cylinder 24 and lower cylinder 26 of the node, as well as the connecting rod assembly 32, vertical slide rod 18, vertical spring 14, and second transverse spring 23. Then connect the transverse damping device to the middle node and the prefabricated left and right beams. Finally, fix the transverse damping device to the beam with perforated steel sheets, matching rivets, and matching bolts.

[0063] Step 3: Place 30 connecting flanges at the upper end of the cylinder body and the lower end of the cylinder body at the node into the reserved grooves at the lower end of the precast concrete upper column and the upper end of the precast concrete lower column. After pouring and curing, reinforce with flat steel covering parts and screws.

[0064] Step 4: Use a steel plate, threaded screws at both ends, and matching rivets to seal the front and back. The diameter of the pre-drilled bolt holes in the concrete beam should be slightly larger than the diameter of the screws.

[0065] Step 5: Assemble the inner and outer buffer cylinders of the inclined shock absorption device. Fill the inner buffer cylinder with rubber and then connect it to the upper and lower slots.

[0066] This node exhibits good seismic performance and high connection strength, making it suitable for connection nodes in prefabricated structures with small to medium spans. The intermediate node primarily bears the vertical force of earthquakes. The vertical seismic force on the structure is reduced by energy dissipation through lateral and vertical springs. The rubber also plays a role in damping and energy dissipation, and limits the displacement range of the columns. The horizontal force of earthquakes is reduced through lateral damping devices. The horizontal force of earthquakes is reduced by the deformation of the beams, which compresses or stretches the springs in the strip-shaped groove cylinder of the lateral damping device, simultaneously causing the rubber inside the groove cylinder to be compressed, thus achieving the purpose of buffering and energy dissipation. The lateral sliding rod and the irregularly shaped protruding steel block are used to fix the relative position of the groove cylinder and the sliding rod, ensuring that the structural function does not fail. The four springs in the irregularly shaped groove cylinder component also play an auxiliary role. The main purpose of these springs is to ensure that the collision between the irregularly shaped slider and the irregularly shaped groove cylinder is elastic, effectively protecting the component from damage. The protruding steel blocks on both sides of the intermediate node are embedded in the precast grooves of the concrete left and right beams. This is to prevent the intermediate node from dislodging from its original position during irregular deformation of the beams and columns under seismic loads, thus preventing structural failure of the intermediate node and subsequent instability of the entire structure. The connection between the intermediate node and the upper and lower beams is a rigid connection, which improves the overall structural integrity and enhances safety. The connection between the intermediate node and the beams is an elastic connection, but this does not affect its load-bearing capacity and improves the seismic performance of the structure.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefabricated beam-column joint vibration reduction structure, characterized in that, It includes vertical damping structures connecting reinforced concrete columns, horizontal damping structures connecting reinforced concrete beams, and oblique damping structures that connect both reinforced concrete columns and reinforced concrete beams. The vertical damping structure includes an upper cylinder (24) at the node, a connecting rod assembly (32) is hinged to the middle part of the upper cylinder at the node, and the lower end of the connecting rod assembly is elastically connected to the lower cylinder (26) at the node in the horizontal direction. Multiple vertical slide rods (18) are provided on the front and rear sides of the connecting rod assembly. The upper end of the vertical slide rod is connected to the upper cylinder (24) at the node, and the lower end of the vertical slide rod is elastically connected to the lower cylinder (26) at the node in the vertical direction. The transverse damping structure penetrates the lower cylinder body (26) of the node and is symmetrically distributed on the left and right sides of the lower cylinder body of the node; The inclined damping structure is installed between the reinforced concrete column and the reinforced concrete beam; The transverse damping structure includes at least two transverse slide rods (19) symmetrically distributed front and rear. Each transverse slide rod passes through the lower cylinder body (26) of the node in both left and right directions. Each transverse slide rod is connected to a first irregular steel block (17) at both ends. Each first irregular steel block is elastically connected to a first irregular groove cylinder (15). The first irregular groove cylinder is embedded in the interior of the reinforced concrete beam.

2. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, A first transverse spring (16) is provided between the first irregular steel block and the first irregular groove cylinder.

3. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, Two transverse sliding rods (19) at the same height are connected together by a second irregular steel block (21), and two first irregular groove cylinders (15) at the same height are connected together by a second irregular groove cylinder (22). The second irregular steel block (21) and the second irregular groove cylinder (22) are connected to each other by insertion.

4. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, The transverse damping structure consists of two sets, which are symmetrically distributed on the upper and lower sides of the reinforced concrete beam.

5. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, Multiple grooves are provided on the sides of the reinforced concrete beams on the left and right sides of the beam-column joint. The grooves on the reinforced concrete beams on the left and right sides are symmetrically arranged about the beam-column joint. A first irregular groove cylinder (15) is installed in each groove.

6. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, Each vertical slide bar is connected to a vertical spring (14) at its lower end, and the other end of the vertical spring is connected to the lower cylinder (26) of the node.

7. The prefabricated beam-column joint vibration reduction structure according to claim 1, characterized in that, The connecting rod assembly consists of two connecting rods arranged in an inverted V shape between the upper cylinder and the lower cylinder of the node.

8. A prefabricated beam-column joint vibration reduction structure according to claim 7, characterized in that, Each link has a second transverse spring (23) connected to its lower end on both sides, and the other end of the second transverse spring is connected to the side wall of the lower cylinder (26) of the node.

9. The construction method of the prefabricated beam-column joint vibration reduction structure according to claim 1, the specific steps are as follows: Step 1: Prefabricate reinforced concrete columns, reinforced concrete beams, vertical damping structures, horizontal damping structures, and diagonal damping structures in the factory; Step 2: Assemble the various parts of the vertical damping structure and connect the horizontal damping structure with the vertical damping structure and the reinforced concrete beam; Step 3: Connect the upper and lower ends of the vertical damping structure to the corresponding reinforced concrete columns, pour and cure the concrete, and then reinforce it with covering parts and screws. Step 4: Seal the front and back of the reinforced concrete beam with steel plates, screws, and matching rivets; Step 5: Install the inclined damping structure between the reinforced concrete column and the reinforced concrete beam.

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