Detachable and replaceable assembly type steel-concrete composite structure beam column energy consumption connecting joint and construction method thereof

Abstract

The invention discloses a detachable and replaceable assembly type steel-concrete composite structure beam column energy dissipation connecting joint and a construction method thereof. The connecting joint comprises an energy dissipation module, a steel-concrete composite shear wall / special-shaped column connecting structure, a prefabricated concrete composite beam end structure, a pin shaft and a one-way high-strength bolt. The energy consumption module can achieve three-level energy consumption and comprises an upper cover plate I and a lower cover plate I. The upper cover plate I and the lower cover plate I are connected through the left end sealing plate and the right end sealing plate to form a box body structure with four closed faces and two open faces. A web plate is arranged in the box body and between the upper cover plate and the lower cover plate I, the box body is divided into two cavities, and concrete is poured in the cavities. During assembly, the two ends of the energy consumption module are embedded into the wall / column connecting structure and the beam end structure correspondingly and are positioned and fastened through the pin shafts and the one-way high-strength bolts. Post-earthquake damage control of the steel-concrete composite structure beam-column connecting joint can be achieved, the good shock absorption and energy dissipation capacity is achieved, dismounting, replacement and maintenance are convenient after an earthquake, and installation is easy and convenient.

Description

Technical Field

[0001] This invention relates to the field of building structure engineering technology, specifically to a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node and its construction method. Background Technology

[0002] The safety and reliability of building structures are fundamental to ensuring personal and property safety. Beam-column connections, as critical force transmission hubs, directly impact the overall structure's seismic resistance and post-disaster repair feasibility. With the acceleration of my country's construction industrialization, prefabricated structural systems have gained widespread application due to their advantages such as high construction efficiency, controllable quality, and minimal environmental impact. Among these, the combination of steel-concrete composite structures (such as steel-concrete composite shear walls and steel-concrete composite columns) and precast concrete composite beams combines the advantages of good ductility in steel structures and high stiffness in concrete structures, showing promising application prospects in high-rise and super high-rise buildings and large-span structures.

[0003] For connection nodes where vertical members are steel-concrete composite shear walls or steel-concrete composite irregular columns, and horizontal members are precast concrete composite beams, existing connection technologies still have significant limitations. Currently common connection methods mainly include welding, bolting, and cast-in-place wet joints. While welding offers direct force transmission and high stiffness, the quality of on-site welding is difficult to guarantee. The heat-affected zone is prone to residual stress and brittle structures, leading to reduced joint ductility and susceptibility to brittle failure under seismic loading. Furthermore, post-fault repair is extremely difficult, often requiring replacement or reinforcement of the entire joint area, resulting in high costs and long timelines. While ordinary bolting is convenient to construct and avoids on-site welding, it is prone to slippage or bolt shearing under strong earthquakes, leading to joint failure. It also suffers from the problem of inconvenient post-earthquake repair.

[0004] In recent years, with the emergence of resilient architecture and recoverable functional structures, the concept of replaceable energy-dissipating components or nodes has gradually gained attention. This concept aims to design specific connections in a structure as "fuses," allowing them to preferentially enter plasticity and dissipate energy under extreme loads such as earthquakes, while the main load-bearing components remain elastic or only slightly damaged. After an earthquake, simply replacing these removable energy-dissipating elements can quickly restore the structure's functionality, significantly reducing repair costs and time. However, existing replaceable energy-dissipating connection technologies still face many challenges in practical engineering applications: First, the construction is complex, with multiple connection interfaces between energy-dissipating elements and the main structure, and unclear force transmission paths, affecting the stress performance and reliability of the nodes; second, replacement feasibility is poor, often lacking effective disassembly space and operational procedures, leading to difficult and inefficient on-site replacement; third, the multi-stage energy dissipation mechanism is unclear, and many designs fail to effectively coordinate the collaborative work of different energy-dissipating elements at different deformation stages, resulting in low energy dissipation efficiency or premature failure. Summary of the Invention

[0005] The purpose of this invention is to provide a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node, including an energy-dissipating module, a steel-concrete composite shear wall / irregular column connection structure, a precast concrete composite beam end structure, a pin shaft, and a unidirectional high-strength bolt.

[0006] The energy-consuming module includes an upper cover plate I, a lower cover plate I, an end sealing plate, a web plate, a round steel pipe, a cylindrical head stud, an energy-consuming rubber block, and reinforced concrete.

[0007] The upper cover plate I is located directly above the lower cover plate I. The upper cover plate I and the lower cover plate I are connected by two end sealing plates, forming a box structure that is closed on four sides and open on two sides. Inside the box, a web plate perpendicular to the two end sealing plates is provided between the upper cover plate I and the lower cover plate I to divide the interior of the box into two chambers. Energy-dissipating rubber blocks are attached to the side walls of the two chambers. Multiple sets of cylindrical head studs are spaced apart on the two sides of the web plate. The two chambers are filled with reinforced concrete.

[0008] The end cap plate is provided with several circular steel pipes spaced apart. The axial direction of the circular steel pipes is perpendicular to the plane of the web plate. The two ends of the lower cover plate I extend out of the box body, and the extended sections are provided with several bolt holes I spaced apart.

[0009] The connecting component of the steel-concrete composite shear wall / irregular column connection structure is in the shape of a groove I. The plate forming the groove I is provided with a number of bolt holes II and a number of pin connection holes I at intervals.

[0010] The connecting component of the precast concrete composite beam end structure is in the shape of a groove II, and the plate forming the groove II is provided with a number of bolt holes III and a number of pin connection holes II at intervals.

[0011] The number and position of bolt holes II and III correspond to the number and position of bolt holes I on both ends of the lower cover plate I, respectively. The number and position of pin connection holes I and pin connection holes II correspond to the number and position of the round steel pipes on both end caps, respectively.

[0012] During assembly, the two ends of the energy-consuming module are embedded in groove I and groove II respectively, and the energy-consuming module is positioned and fastened using pins and one-way high-strength bolts.

[0013] Furthermore, the energy-consuming module can achieve three-stage energy consumption: the first stage of energy consumption is achieved through the deformation provided by the energy-consuming rubber block; the second stage of energy consumption is achieved through the compressive strength provided by the reinforced concrete; and the third stage of energy consumption is achieved through the yield force provided by the upper cover plate I and the lower cover plate I.

[0014] Furthermore, the upper cover plate I and the lower cover plate I can be made of carbon structural steel or low-alloy high-strength structural steel.

[0015] The round steel pipe is made of seamless steel pipe.

[0016] The upper cover plate I, lower cover plate I, end sealing plate, web plate, and round steel pipe are all connected by welding.

[0017] Furthermore, the upper cover plate I and the lower cover plate I are arranged in parallel. The end sealing plate is perpendicular to the lower cover plate I. Several circular steel pipes are arranged in parallel, and their axes are parallel to the surface of the lower cover plate I. The two sections extending out of the box body on both sides of the lower cover plate I are of equal length.

[0018] Furthermore, the steel-concrete composite shear wall / irregular column connection structure includes a steel-concrete composite shear wall / irregular column, a vertical connecting rib, an upper cover plate II, and a lower cover plate II.

[0019] The steel-concrete composite shear wall / irregular column is equipped with a steel plate.

[0020] The steel-concrete composite shear wall / irregular column has vertical connecting ribs on both sides. One end of each vertical connecting rib is welded to the outer steel plate of the steel-concrete composite shear wall / irregular column, and the other end extends out of the steel-concrete composite shear wall / irregular column. An upper cover plate II and a lower cover plate II, perpendicular to the vertical connecting ribs, are provided between the two vertical connecting ribs. A groove I is formed between the upper cover plate II, the lower cover plate II, the extended ends of the two vertical connecting ribs, and the steel-concrete composite shear wall / irregular column.

[0021] The upper cover plate II and the lower cover plate II are arranged in parallel, with the upper cover plate II located above the lower cover plate II. The length of the upper cover plate II is greater than the length of the lower cover plate II, and the upper cover plate II extends out of the groove I.

[0022] The lower cover plate II has several bolt holes II spaced apart on its surface.

[0023] The vertical connecting rib is provided with several pin connection holes I spaced apart.

[0024] During assembly, one end of the energy-consuming module is embedded in groove I. At this time, the upper cover plate II and the lower cover plate II are located above the upper cover plate I and the lower cover plate I, respectively. The pin connection holes I on the vertical connecting ribs on both sides correspond to the two ends of the round steel pipe. The pins are positioned by passing through the pin connection holes I on one side of the vertical connecting rib, the round steel pipe, and the pin connection holes I on the other side of the vertical connecting rib. The bolt holes I on the lower cover plate I, which extends into groove I, are aligned with the bolt holes II on the lower cover plate II. The energy-consuming module and the steel-concrete composite shear wall / irregular column connection structure are fastened with unidirectional high-strength bolts.

[0025] Furthermore, the precast concrete composite beam end structure includes a vertical connecting plate, an upper cover plate III, a lower cover plate III, bolt holes III, pin connection holes II, an end plate, a steel short beam, PBL shear connectors, a precast concrete composite beam, longitudinal reinforcement, and stirrups. The steel short beam is embedded within the precast concrete composite beam, with one end welded to the end plate. PBL shear connectors are welded to both the upper and lower sides of the steel short beam, and the two ends of the PBL shear connectors are welded to the end plate and the longitudinal reinforcement within the precast concrete composite beam, respectively. Within the precast concrete composite beam, the longitudinal reinforcement not welded to the PBL shear connectors is welded to the end plate. The stirrups in the connection area between the precast concrete composite beam and the steel short beam are densely arranged.

[0026] Two vertical connecting plates are welded opposite each other on the other side of the end plate. The two vertical connecting plates are arranged in parallel and perpendicular to the end plate. An upper cover plate III and a lower cover plate III are welded between the two vertical connecting plates. A groove II is formed between the two vertical connecting plates and the end plate, the upper cover plate III, and the lower cover plate III.

[0027] The upper cover plate III and the lower cover plate III are arranged in parallel, with the upper cover plate III located above the lower cover plate III. The length of the upper cover plate III is greater than the length of the lower cover plate III, and one end of the upper cover plate III extends out of the groove II.

[0028] The lower cover plate III has several bolt holes III spaced apart on its surface.

[0029] The vertical connecting plate is provided with several pin connection holes II at intervals.

[0030] During assembly, one end of the energy-consuming module is embedded in groove II. At this time, the upper cover plate III and the lower cover plate III are located above the upper cover plate I and the lower cover plate I, respectively. The pin connection holes II on the vertical connecting plates on both sides correspond to the two ends of the round steel pipe. The pins are positioned by passing through one vertical connecting plate, the round steel pipe, and the other vertical connecting plate in sequence. The bolt hole I on the lower cover plate I, which extends into groove II, is aligned with the bolt hole III on the lower cover plate III. The energy-consuming module and the beam end structure of the precast concrete composite beam are fastened with unidirectional high-strength bolts.

[0031] Furthermore, the shape of the energy-dissipating rubber block is adapted to the shape of the chamber. The energy-dissipating rubber block has an overall square ring structure and is attached to the side wall of the chamber. The side wall of the chamber includes the side wall of the upper cover plate I, the side wall of the lower cover plate I, and the side wall of the end seal plate inside the chamber.

[0032] The energy-consuming rubber block is fixed by a double fixation method:

[0033] An adhesive is used to attach the energy-consuming rubber block to the side wall of the chamber.

[0034] The energy-dissipating rubber block has several through holes spaced apart. When pouring concrete, the concrete is poured into the through holes to fix the energy-dissipating rubber block.

[0035] Furthermore, the pin can be made of low-alloy high-strength structural steel or alloy structural steel.

[0036] Furthermore, the method for manufacturing the energy-consuming module includes the following steps:

[0037] S1. The frame structure of the welding energy consumption module, the frame structure including an upper cover plate I, a lower cover plate I, an end sealing plate, a web plate and a round steel pipe; the web plate divides the frame structure into two chambers;

[0038] S2. Weld several cylindrical head studs to the web plate;

[0039] S3. Attach energy-dissipating rubber blocks to the inner wall of one side chamber; then place a steel mesh in the same side chamber and pour concrete.

[0040] S4. After the concrete has cured and solidified to 70% of its strength, repeat step S3) to complete the fabrication of the energy-consuming rubber block and reinforced concrete for the other side chamber.

[0041] Another objective of this invention is to provide a method for replacing energy-dissipating connection nodes of beams and columns in a detachable and replaceable prefabricated steel-concrete composite structure. When the energy-dissipating module is damaged under seismic loading, it needs to be replaced. The replacement includes the following steps:

[0042] S1. Temporary supports are installed around the precast concrete composite beam;

[0043] S2. Remove the pin and one-way high-strength bolt to disassemble the damaged energy-consuming module;

[0044] S3. Clean the bolt holes II and pin connection holes I on the steel-concrete composite shear wall / irregular column connection structure, as well as the bolt holes III and pin connection holes II on the beam end structure of the precast concrete composite beam.

[0045] S4. Place the new energy-consuming module into the connection area, align it accurately, put the pin back in, and fix it with a one-way high-strength bolt.

[0046] S5. Dismantle the temporary supports set around the precast concrete composite beam.

[0047] The technical effects of this invention are undeniable, and its beneficial effects are as follows:

[0048] 1. The connection node of this invention innovatively adopts an independent, replaceable energy-dissipating module as the main energy-dissipating element. It is connected to the steel-concrete composite shear wall / irregular column connection structure and the precast concrete composite beam end structure via pins and unidirectional high-strength bolts. This design cleverly achieves a three-stage energy dissipation mechanism: the first stage dissipates energy through the deformation of rubber blocks within the energy-dissipating module at small angles; the second stage dissipates energy through the compression and breakage of reinforced concrete blocks within the module as the angle increases; the third stage, after the reinforced concrete blocks fail, the upper and lower steel cover plates of the module enter the yielding stage, providing stable plastic energy dissipation. This multi-stage, multi-layered energy dissipation design ensures the reliable performance of the node under earthquakes of varying intensities.

[0049] 2. After an earthquake damages the energy dissipation module, the connection node of the present invention can be quickly and conveniently replaced through standardized steps such as setting temporary supports, disassembling pins and bolts, replacing new modules, and reconnecting. This minimizes post-earthquake repair time and costs and significantly improves the structure's recoverability and seismic toughness.

[0050] 3. The connection node structure of the present invention is reasonably designed, with necessary installation and rotation space reserved, ensuring the feasibility and convenience of construction. It effectively solves the contradiction between existing steel-concrete composite shear wall and precast composite beam connection nodes in terms of seismic performance, replaceability and construction efficiency, and provides strong technical support for promoting high-performance and recoverable prefabricated structural systems. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to the present invention.

[0052] Figure 2 This is a schematic diagram of the energy-consuming module;

[0053] Figure 3 This is a schematic diagram of the energy-consuming module, in which... Figure 3 (a) is the front view. Figure 3 (b) is a sectional view;

[0054] Figure 4 This is a schematic diagram of the connection structure between a steel-concrete composite shear wall and an irregularly shaped column. Figure 4 (a) is the front view. Figure 4 (b) is the right view;

[0055] Figure 5 This is a schematic diagram of the end structure of a precast concrete composite beam, in which... Figure 5 (a) is the front view. Figure 5 (b) is a top view;

[0056] In the diagram: 1. Energy-consuming module; 2. Steel-concrete composite shear wall / irregular column connection structure; 3. Precast concrete composite beam end structure; 4. Pin shaft; 5. One-way high-strength bolt.

[0057] Upper cover plate I101, lower cover plate I102, bolt hole I1021, end sealing plate 103, web plate 104, round steel pipe 105, cylindrical head stud 106, energy-consuming rubber block 107, reinforced concrete 108;

[0058] Steel-concrete composite shear wall / irregular column 201, vertical connecting rib plate 202, upper cover plate II 203, lower cover plate II 204, bolt hole II 2041, pin connection hole I 205;

[0059] Vertical connecting plate 301, upper cover plate Ⅲ 302, lower cover plate Ⅲ 303, bolt hole Ⅲ 3031, pin connection hole Ⅱ 304, end plate 305, steel short beam 306, PBL shear connector 307, precast concrete composite beam 308, longitudinal reinforcement 309, stirrup 310. Detailed Implementation

[0060] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0061] Example 1:

[0062] See Figure 1 A detachable and replaceable prefabricated steel-concrete composite structure beam-column energy dissipation connection node includes an energy dissipation module 1, a steel-concrete composite shear wall / irregular column connection structure 2, a precast concrete composite beam end structure 3, a pin shaft 4, and a one-way high-strength bolt 5.

[0063] The energy-consuming module 1 is located between the steel-concrete composite shear wall / irregular column connection structure 2 and the precast concrete composite beam end structure 3, and is used to connect the steel-concrete composite shear wall / irregular column connection structure 2 and the precast concrete composite beam end structure 3.

[0064] See Figure 2 and Figure 3 The energy-consuming module 1 includes an upper cover plate I 101, a lower cover plate I 102, an end sealing plate 103, a web plate 104, a round steel pipe 105, a cylindrical head stud 106, an energy-consuming rubber block 107, and reinforced concrete 108.

[0065] The upper cover plate I101 is located directly above the lower cover plate I102. The upper cover plate I101 and the lower cover plate I102 are connected by two end sealing plates 103, forming a box structure that is closed on four sides and open on two sides. Inside the box, a web plate 104 perpendicular to the two end sealing plates 103 is provided between the upper cover plate I101 and the lower cover plate I102 to divide the interior of the box into two chambers. Energy-dissipating rubber blocks 107 are attached to the side walls of the two chambers. Multiple sets of cylindrical head studs 106 are spaced apart on the two sides of the web plate 104. The two chambers are filled with reinforced concrete 108.

[0066] The end cap 103 is provided with a plurality of round steel pipes 105 spaced apart. The axial direction of the round steel pipes 105 is perpendicular to the plane of the web plate 104. The two ends of the lower cover plate I 102 extend out of the box body, and the extended sections are provided with a plurality of bolt holes I 1021 spaced apart.

[0067] The connecting component of the steel-concrete composite shear wall / irregular column connection structure 2 is in the shape of a groove I. The plate forming the groove I is provided with a number of bolt holes II2041 and a number of pin connection holes I205 at intervals.

[0068] The connecting component of the precast concrete composite beam end structure 3 is in the shape of a groove II. The plate forming the groove II is provided with a number of bolt holes III 3031 and a number of pin connection holes II 304 at intervals.

[0069] The number and position of bolt holes II2041 and III3031 correspond to the number and position of bolt holes I1021 on both ends of the lower cover plate I102. The number and position of pin connection holes I205 and II304 correspond to the number and position of round steel pipes 105 on both end sealing plates 103.

[0070] During assembly, the two ends of the energy-consuming module 1 are respectively embedded in groove I and groove II, and the energy-consuming module 1 is positioned and fastened by pin 4 and one-way high-strength bolt 5.

[0071] Example 2:

[0072] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, the energy-consuming module 1 can achieve three-stage energy consumption: the first stage of energy consumption is achieved by the deformation provided by the energy-consuming rubber block 107; the second stage of energy consumption is achieved by the compressive strength provided by the reinforced concrete 108; and the third stage of energy consumption is achieved by the yield force provided by the upper cover plate I 101 and the lower cover plate I 102.

[0073] Example 3:

[0074] The main structure of this embodiment is the same as any one of embodiments 1-2. Furthermore, the upper cover plate I101 and the lower cover plate I102 can be made of carbon structural steel or low-alloy high-strength structural steel. Among them, low-alloy high-strength structural steel refers to steel that meets the requirements of the current national standard "Low-alloy High-strength Structural Steel" (GB / T 1591-2018).

[0075] The round steel pipe 105 is made of seamless steel pipe. The upper cover plate I 101, the lower cover plate I 102, the end sealing plate 103, the web plate 104, and the round steel pipe 105 are all connected by welding.

[0076] Example 4:

[0077] The main structure of this embodiment is the same as any one of embodiments 1 to 3. Further, see [link to embodiment 1]. Figure 2 The upper cover plate I101 and the lower cover plate I102 are arranged in parallel. The end sealing plate 103 is perpendicular to the lower cover plate I102. A plurality of the circular steel pipes 105 are arranged in parallel, and their axes are parallel to the surface of the lower cover plate I102. The two sections extending out of the box body on both sides of the lower cover plate I102 are of equal length.

[0078] Example 5:

[0079] The main structure of this embodiment is the same as any one of embodiments 1 to 4. Further, see [link to embodiment 1]. Figure 4 The steel-concrete composite shear wall / irregular column connection structure 2 includes a steel-concrete composite shear wall / irregular column 201, a vertical connecting rib plate 202, an upper cover plate II 203, and a lower cover plate II 204.

[0080] The steel-concrete composite shear wall / irregular column 201 is externally fitted with a steel plate.

[0081] The steel-concrete composite shear wall / irregular column 201 has vertical connecting ribs 202 on both sides. One end of each vertical connecting rib 202 is welded to the external steel plate of the steel-concrete composite shear wall / irregular column 201, and the other end extends out of the steel-concrete composite shear wall / irregular column 201. Between the two vertical connecting ribs 202, there is an upper cover plate II 203 and a lower cover plate II 204 perpendicular to the vertical connecting ribs 202. The upper cover plate II 203 and the lower cover plate II 204 are rectangular plates, and the three side walls of the upper cover plate II 203 / lower cover plate II 204 are welded to the external steel plate and the two vertical connecting ribs 202, respectively.

[0082] A groove I is formed between the upper cover plate II 203, the lower cover plate II 204, the protruding ends of the two vertical connecting ribs 202, and the steel-concrete composite shear wall / irregular column 201.

[0083] The upper cover plate II 203 and the lower cover plate II 204 are arranged in parallel, with the upper cover plate II 203 located above the lower cover plate II 204. The length of the upper cover plate II 203 is greater than the length of the lower cover plate II 204, and the upper cover plate II 203 extends out of the groove I.

[0084] The lower cover plate Ⅱ204 has several bolt holes Ⅱ2041 spaced apart on its surface.

[0085] The vertical connecting rib plate 202 is provided with a plurality of pin connecting holes I205 at intervals.

[0086] During assembly, one end of the energy-consuming module 1 is embedded in the groove I. At this time, the upper cover plate II 203 and the lower cover plate II 204 are located above the upper cover plate I 101 and the lower cover plate I 102, respectively. The pin connection holes I 205 on the vertical connecting ribs 202 on both sides correspond to the two ends of the round steel pipe 105. The pin 4 is positioned by passing through the pin connection holes I 205 on one side of the vertical connecting rib 202, the round steel pipe 105, and the pin connection holes I 205 on the other side of the vertical connecting rib 202. The bolt holes I 1021 on the lower cover plate I 102, which extends into the groove I, are aligned with the bolt holes II 2041 on the lower cover plate II 204. The energy-consuming module 1 and the steel-concrete composite shear wall / irregular column connection structure 2 are fastened by unidirectional high-strength bolts 5.

[0087] Example 6:

[0088] The main structure of this embodiment is the same as any one of embodiments 1 to 5. Further, see [link to embodiment 1-5]. Figure 5 The precast concrete composite beam end structure 3 includes a vertical connecting plate 301, an upper cover plate Ⅲ 302, a lower cover plate Ⅲ 303, bolt holes Ⅲ 3031, pin connection holes Ⅱ 304, an end plate 305, a steel short beam 306, a PBL shear connector 307, a precast concrete composite beam 308, longitudinal reinforcement 309, and stirrups 310.

[0089] The steel short beam 306 is embedded within the precast concrete composite beam 308, with one end welded to the end plate 305. PBL shear connectors 307 are welded to both the top and bottom sides of the steel short beam 306, with both ends of the PBL shear connectors 307 welded to the end plate 305 and the longitudinal reinforcement 309 within the precast concrete composite beam 308, respectively. Within the precast concrete composite beam 308, the longitudinal reinforcement 309 not welded to the PBL shear connectors 307 is welded to the end plate 305. The stirrups 310 in the connection area between the precast concrete composite beam 308 and the steel short beam 306 are densely arranged.

[0090] Two vertical connecting plates 301 are welded opposite each other on the other side of the end plate 305. The two vertical connecting plates 301 are arranged in parallel and perpendicular to the end plate 305. An upper cover plate III 302 and a lower cover plate III 303 are welded between the two vertical connecting plates 301. The upper cover plate III 302 and the lower cover plate III 303 are rectangular plates, and the three side walls of the upper cover plate III 302 and the lower cover plate III 303 are respectively welded to the end plate 305 and the two vertical connecting plates 301.

[0091] Grooves II are formed between the two vertical connecting plates 301 and the end plate 305, the upper cover plate Ⅲ 302 and the lower cover plate Ⅲ 303.

[0092] The upper cover plate Ⅲ302 and the lower cover plate Ⅲ303 are arranged in parallel, with the upper cover plate Ⅲ302 located above the lower cover plate Ⅲ303. The length of the upper cover plate Ⅲ302 is greater than the length of the lower cover plate Ⅲ303, and one end of the upper cover plate Ⅲ302 extends out of the groove Ⅱ.

[0093] The lower cover plate Ⅲ303 has several bolt holes Ⅲ3031 spaced apart on its surface.

[0094] The vertical connecting plate 301 is provided with a plurality of pin connecting holes II 304 at intervals.

[0095] During assembly, one end of the energy-consuming module 1 is embedded in the groove II. At this time, the upper cover plate III 302 and the lower cover plate III 303 are located above the upper cover plate I 101 and the lower cover plate I 102, respectively. The pin connection holes II 304 on the vertical connecting plates 301 on both sides correspond to the two ends of the round steel pipe 105. The pin 4 passes through the vertical connecting plate 301 on one side, the round steel pipe 105, and the vertical connecting plate 301 on the other side for positioning. The bolt hole I 1021 on the lower cover plate I 102, which extends into the groove II, is aligned with the bolt hole III 3031 on the lower cover plate III 303. The energy-consuming module 1 and the precast concrete composite beam end structure 3 are fastened by unidirectional high-strength bolts 5.

[0096] Example 7:

[0097] The main structure of this embodiment is the same as any one of embodiments 1 to 6. Further, see [link to embodiment 1-6]. Figure 2 The shape of the energy-dissipating rubber block 107 is adapted to the shape of the chamber. The energy-dissipating rubber block 107 has a square ring structure and is attached to the side wall of the chamber. The side wall of the chamber includes the side wall of the upper cover plate I 101, the side wall of the lower cover plate I 102, and the side wall of the end sealing plate 103 inside the chamber.

[0098] The energy-consuming rubber block 107 is fixed by a double fixation method:

[0099] The energy-consuming rubber block 107 is attached to the side wall of the chamber using an adhesive.

[0100] The energy-consuming rubber block 107 has several through holes spaced apart. When pouring concrete, the concrete is poured into the through holes to fix the energy-consuming rubber block 107.

[0101] Example 8:

[0102] The main structure of this embodiment is the same as any one of embodiments 1 to 7. Furthermore, the pin 4 can be made of low alloy high strength structural steel or alloy structural steel.

[0103] Low-alloy high-strength structural steel refers to steel that meets the requirements of the current national standard "Low-alloy high-strength structural steel" (GB / T1591-2018); alloy structural steel refers to steel that meets the requirements of the current national standard "Alloy structural steel" (GB / T 3077-2015).

[0104] Example 9:

[0105] The main structure of this embodiment is the same as any one of embodiments 1 to 8. Furthermore, the manufacturing method of the energy-consuming module 1 includes the following steps:

[0106] S1. The frame structure of the welding energy dissipation module 1 includes an upper cover plate I 101, a lower cover plate I 102, an end sealing plate 103, a web plate 104, and a round steel pipe 105; the web plate 104 divides the frame structure into two chambers.

[0107] S2. Weld several cylindrical head studs 106 onto the web plate 104;

[0108] S3. Attach energy-dissipating rubber blocks 107 to the inner wall of one side chamber. Then place a steel mesh in the same side chamber and pour concrete.

[0109] S4. After the concrete has cured and solidified to 70% of its strength, repeat step S3 to complete the fabrication of the energy-consuming rubber block and reinforced concrete for the other chamber.

[0110] Example 10:

[0111] A method for replacing the detachable and replaceable prefabricated steel-concrete composite beam-column energy dissipation connection node, based on embodiments 1-9, is provided. When the energy dissipation module 1 is damaged under seismic loading, it needs to be replaced. The replacement includes the following steps:

[0112] S1. Temporary supports are set up around the precast concrete composite beam 308. In this embodiment, coupler-type steel pipe scaffolding is used as temporary supports.

[0113] S2. Remove the pin 4 and the one-way high-strength bolt 5 to disassemble the damaged energy-consuming module 1.

[0114] S3. Clean the bolt holes II2041 and pin connection holes I205 on the steel-concrete composite shear wall / irregular column connection structure 2, and the bolt holes III3031 and pin connection holes II304 on the precast concrete composite beam end structure 3.

[0115] S4. Place the new energy-consuming module 1 into the connection area, align it accurately, and then put the pin 4 back in and fix it with the one-way high-strength bolt 5.

[0116] S5. Dismantle the temporary supports set around the precast concrete composite beam 308.

[0117] Example 11:

[0118] The main structure of this embodiment is the same as any one of embodiments 1 to 10. Furthermore, a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node includes: a detachable and replaceable energy-dissipating module 1, a steel-concrete composite shear wall / irregular column connection structure 2, and a precast concrete composite beam end structure 3.

[0119] The construction method of the energy dissipation connection node is as follows: First, the energy dissipation module 1 is lifted from the lower opening of the steel-concrete composite shear wall / irregular column connection structure 2 and the precast concrete composite beam end structure 3. After accurate alignment, it is connected by pin shaft 4 and one-way high-strength bolt 5 to form a whole to jointly resist the bending moment and shear force at the connection node.

[0120] The energy-consuming module consists of an upper cover plate, a lower cover plate, an end cap plate, a web plate, a round steel pipe, a cylindrical head stud, an energy-consuming rubber block, and an energy-consuming reinforced concrete block.

[0121] The energy-dissipating rubber block provides deformation to achieve the first stage of energy dissipation when the beam and column have a small rotation angle; when the rotation angle exceeds the energy dissipation limit of the rubber block, the reinforced concrete is squeezed and broken to achieve the second stage of energy dissipation; when the reinforced concrete block is destroyed, the steel materials of the upper and lower cover plates yield to achieve the third stage of energy dissipation.

[0122] The steel-concrete composite shear wall / irregular column connection structure 2 consists of two vertical connecting ribs welded to the outer steel plate of the steel-concrete composite shear wall / irregular column, a longer upper cover plate welded to the end steel plate of the steel-concrete composite shear wall / irregular column and the vertical connecting ribs on both sides, and a shorter lower cover plate. The vertical connecting ribs are provided with pin connection holes.

[0123] The precast concrete composite beam end structure 3, consisting of an extended steel short beam, is constructed by welding a vertical connecting plate, an upper cover plate, a lower cover plate, pin connection holes, and an end cap plate. A steel short beam is welded to the rear end of the end cap plate. Two PBL shear connectors are welded to the top and bottom of the steel short beam to transfer shear force between the precast concrete beam and the steel short beam. The steel short beam is embedded in the precast concrete composite beam. The ends of the longitudinal reinforcement in the precast concrete composite beam are welded to the surface of the PBL shear connectors to ensure that the force of the precast concrete composite beam is transferred to the extended steel short beam through the longitudinal reinforcement. The stirrups in the connection area between the precast concrete composite beam and the extended steel short beam are densely reinforced to ensure the integrity of the connection area.

[0124] When energy dissipation module 1 is damaged under earthquake load, the first step is to set up temporary supports to unload the frame beam. The second step is to remove the pin 4 connecting energy dissipation module 1, remove the nut of the one-way high-strength bolt 5, and disassemble the damaged energy dissipation module 1. The third step is to clean the pin holes and bolt holes in the connection area of ​​energy dissipation module 1. The fourth step is to place the new energy dissipation module 1 into the connection area, accurately align it, put the pin 4 back in, and connect it with the one-way high-strength bolt. The fifth step is to remove the temporary supports, allowing the energy dissipation node to connect the frame beam and the steel-concrete composite shear wall / irregular column to form a whole for load bearing.

[0125] Furthermore, in the steel-concrete composite shear wall / irregular column connection structure, the upper cover plate and the upper cover plate of the precast concrete composite beam end structure are both made of long steel plates, leaving a 1-2mm gap at the connection. Rubber strips are used to seal the gap during floor slab construction, which facilitates floor slab forming and provides rotational freedom of the connection node during use, making it easier to apply node deformation to the energy dissipation module.

[0126] Furthermore, in the steel-concrete composite shear wall / irregular column connection structure, both the lower cover plate and the lower cover plate in the precast concrete composite beam end structure are made of relatively short steel plates.

[0127] The spatial dimensions enclosed by the two vertical connecting ribs 202, the upper cover plate II 203, and the lower cover plate II 204 in the steel-concrete composite shear wall / irregular column connection structure, as well as the spatial dimensions enclosed by the two vertical connecting plates 301, the upper cover plate III 302, and the lower cover plate III 303 in the precast concrete composite beam end structure 3, are all 2-3 mm larger than the outline dimensions of the energy-consuming module 1, which facilitates the lifting and positioning of the energy-consuming module 1.

[0128] Furthermore, the upper and lower cover plates of the energy-consuming module 1 can be made of carbon structural steel, low-alloy high-strength structural steel or other high-ductility steel, and the round steel pipe should be made of seamless steel pipe.

[0129] Furthermore, the upper cover plate and end sealing plate of the energy-consuming module 1 should be welded to the round steel pipe.

[0130] Furthermore, the upper cover plate, lower cover plate, end sealing plate, web plate, and round steel pipe of the energy-consuming module 1 are all welded together as a whole; then the cylindrical head studs are welded to both sides of the web plate using a stud gun; next, energy-consuming rubber blocks are placed around the inside of one side of the steel component; finally, a steel mesh is placed inside, and concrete is poured; after the concrete has cured and solidified and reached 70% strength, the process of making the energy-consuming rubber blocks and reinforced concrete on the other side is repeated.

[0131] Furthermore, in the connection structure of the steel-concrete composite shear wall / irregular column, the vertical connecting rib plate and the vertical connecting plate of the precast concrete composite beam end structure are provided with circular holes of the same diameter as the inner diameter of the circular steel pipe in the energy dissipation module 1, which are used for the connection of the pin 4.

[0132] Furthermore, bolt holes are provided on the lower cover plate of energy-consuming module 1, the lower cover plate in the steel-concrete composite shear wall / irregular column connection structure, and the lower cover plate in the precast concrete composite beam end structure for connection of unidirectional high-strength bolts.

[0133] Furthermore, the pin 4 can be made of low-alloy high-strength structural steel or low-carbon alloy carburized steel.

[0134] Example 12:

[0135] The main structure of this embodiment is the same as any one of embodiments 1 to 11. Furthermore, this invention provides a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node and its construction method, belonging to the field of structural engineering technology. This detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node is suitable for prefabricated steel-concrete composite structures and is used for connecting precast concrete beams or steel beams with steel-concrete composite columns or steel-concrete composite shear walls. It aims to significantly improve the energy dissipation capacity and damage controllability of the node under extreme loads such as earthquakes, and to achieve rapid replacement and functional restoration of damaged components after an earthquake.

[0136] The removable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node consists of an overhanging short beam connected to a steel-concrete composite column or steel-concrete composite shear wall, an end structure energy-dissipating module of a precast concrete beam or steel beam, a pin shaft, and a unidirectional high-strength bolt.

[0137] The end structures of the outward-extending steel short beams and precast concrete beams or steel beams are all rectangular cross sections. The lower flange of the cross section has a notch to allow the energy dissipation module to be inserted from bottom to top. The webs on both sides of the cross section have round holes for inserting pins to connect with the energy dissipation module.

[0138] The energy-consuming module consists of upper and lower flange plates, end round steel pipes, end sealing plates between round steel pipes, web plate, cylindrical head studs welded on the web plate, reinforced concrete blocks flush with the flange edges, and a rubber layer between the reinforced concrete blocks and the surrounding steel plates.

[0139] The installation method involves passing a pin through the round hole in the web of the short beam and the round steel pipe at the end of the energy-consuming module, and then connecting the lower flange of the energy-consuming module to the lower flange of the short beam using grooved rivets or one-way high-strength bolts.

[0140] Using this type of connection node at the beam-column joint of prefabricated steel-concrete composite structures can solve the following two problems:

[0141] 1) It can realize three-stage energy dissipation of beam-column connection nodes in prefabricated steel-concrete composite structures through the destruction of energy dissipation modules during earthquakes, thereby avoiding damage to beam-column components during earthquakes;

[0142] 2) It can effectively disassemble and replace the connection nodes after they are damaged by energy dissipation during earthquakes.

[0143] The present invention provides a detachable and replaceable prefabricated steel-concrete composite structure beam-column energy dissipation connection node and its construction method, which can realize post-earthquake damage control of the beam-column connection node of the steel-concrete composite structure, has good shock absorption and energy dissipation capacity, is easy to disassemble, replace and repair after an earthquake, and is simple and convenient to install. It is conducive to the promotion of prefabricated steel-concrete composite structures and has broad market application prospects.

Claims

1. A detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node, characterized in that: It includes energy-consuming modules (1), steel-concrete composite shear wall / irregular column connection structure (2), precast concrete composite beam end structure (3), pin shaft (4) and unidirectional high-strength bolts (5). The energy-consuming module (1) includes an upper cover plate I (101), a lower cover plate I (102), an end cap plate (103), a web plate (104), a round steel pipe (105), a cylindrical head stud (106), an energy-consuming rubber block (107), and reinforced concrete (108). The upper cover plate I (101) is located directly above the lower cover plate I (102); the upper cover plate I (101) and the lower cover plate I (102) are connected by two end sealing plates (103) on the left and right sides, forming a box structure with four closed sides and two open sides; inside the box, a web plate (104) perpendicular to the two end sealing plates (103) is provided between the upper cover plate I (101) and the lower cover plate I (102) to divide the inside of the box into two chambers; energy-consuming rubber blocks (107) are attached to the inner side walls of the two chambers; multiple sets of cylindrical head studs (106) are spaced apart on the two sides of the web plate (104); the two chambers are filled with reinforced concrete (108). The end cap plate (103) is provided with a number of round steel pipes (105) at intervals; the axial direction of the round steel pipes (105) is perpendicular to the plane where the web plate (104) is located; the two ends of the lower cover plate I (102) extend out of the box body, and the extended section is provided with a number of bolt holes I (1021) at intervals. The connecting component of the steel-concrete composite shear wall / irregular column connection structure (2) is in the shape of a groove I. The plate forming the groove I is provided with a number of bolt holes II (2041) and a number of pin connection holes I (205) at intervals. The connecting component of the precast concrete composite beam end structure (3) is in the shape of a groove II. The plate forming the groove II is provided with a number of bolt holes III (3031) and a number of pin connection holes II (304) at intervals. The number and position of bolt holes II (2041) and III (3031) correspond to the number and position of bolt holes I (1021) on both ends of the lower cover plate I (102); the number and position of pin connection holes I (205) and II (304) correspond to the number and position of round steel pipes (105) on both end sealing plates (103). During assembly, the two ends of the energy-consuming module (1) are embedded in groove I and groove II respectively, and the energy-consuming module (1) is positioned and fastened by pin (4) and one-way high-strength bolt (5).

2. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The energy-consuming module (1) can achieve three-stage energy consumption: the first stage of energy consumption is achieved by the deformation provided by the energy-consuming rubber block (107); the second stage of energy consumption is achieved by the compressive strength provided by the reinforced concrete (108); and the third stage of energy consumption is achieved by the yield force provided by the upper cover plate I (101) and the lower cover plate I (102).

3. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The upper cover plate I (101) and the lower cover plate I (102) can be made of carbon structural steel or low alloy high strength structural steel; The round steel pipe (105) is made of seamless steel pipe; The upper cover plate I (101), lower cover plate I (102), end sealing plate (103), web plate (104), and round steel pipe (105) are all connected by welding.

4. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The upper cover plate I (101) and the lower cover plate I (102) are arranged in parallel; the end sealing plate (103) is perpendicular to the lower cover plate I (102); a plurality of the round steel pipes (105) are arranged in parallel, and their axes are parallel to the surface of the lower cover plate I (102); the two sections extending out of the box on both sides of the lower cover plate I (102) are of equal length.

5. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The steel-concrete composite shear wall / irregular column connection structure (2) includes a steel-concrete composite shear wall / irregular column (201), a vertical connecting rib plate (202), an upper cover plate II (203), and a lower cover plate II (204). The steel-concrete composite shear wall / irregular column (201) is externally fitted with a steel plate; The steel-concrete composite shear wall / irregular column (201) has vertical connecting ribs (202) on both sides; one end of the vertical connecting rib (202) is welded to the outer steel plate of the steel-concrete composite shear wall / irregular column (201), and the other end extends out of the steel-concrete composite shear wall / irregular column (201); an upper cover plate II (203) and a lower cover plate II (204) perpendicular to the vertical connecting ribs (202) are provided between the two vertical connecting ribs (202); a groove I is formed between the upper cover plate II (203), the lower cover plate II (204), the extended ends of the two vertical connecting ribs (202) and the steel-concrete composite shear wall / irregular column (201); The upper cover plate II (203) and the lower cover plate II (204) are arranged in parallel, and the upper cover plate II (203) is located above the lower cover plate II (204); the length of the upper cover plate II (203) is greater than the length of the lower cover plate II (204), and the upper cover plate II (203) extends out of the groove I; The lower cover plate II (204) has several bolt holes II (2041) spaced apart on its surface. The vertical connecting rib (202) is provided with a plurality of pin connecting holes I (205) spaced apart. During assembly, one end of the energy-consuming module (1) is embedded in the groove I. At this time, the upper cover plate II (203) and the lower cover plate II (204) are located above the upper cover plate I (101) and the lower cover plate I (102), respectively. The pin connection holes I (205) on the vertical connecting ribs (202) on both sides correspond to the two ends of the round steel pipe (105). The pin (4) passes through the pin connection holes I (205) on one side of the vertical connecting rib (202), the round steel pipe (105), and the pin connection holes I (205) on the other side of the vertical connecting rib (202) for positioning. The bolt hole I (1021) on the lower cover plate I (102) extending into one end of the groove I is aligned with the bolt hole II (2041) on the lower cover plate II (204). The energy-consuming module (1) and the steel-concrete composite shear wall / irregular column connection structure (2) are fastened by the unidirectional high-strength bolt (5).

6. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The precast concrete composite beam end structure (3) includes a vertical connecting plate (301), an upper cover plate III (302), a lower cover plate III (303), bolt holes III (3031), pin connection holes II (304), an end plate (305), a steel short beam (306), a PBL shear connector (307), a precast concrete composite beam (308), longitudinal reinforcement (309), and the stirrups (310). The steel short beam (306) is embedded in the precast concrete composite beam (308), and one end is welded to the end plate (305); PBL shear connectors (307) are welded to both the upper and lower sides of the steel short beam (306), and the two ends of the PBL shear connectors (307) are welded to the end plate (305) and the longitudinal reinforcement (309) in the precast concrete composite beam (308) respectively; the longitudinal reinforcement (309) in the precast concrete composite beam (308) that is not welded to the PBL shear connectors (307) is welded to the end plate (305); the stirrups (310) in the connection area between the precast concrete composite beam (308) and the steel short beam (306) are densely arranged; Two vertical connecting plates (301) are welded opposite each other on the other side of the end plate (305); the two vertical connecting plates (301) are arranged in parallel and perpendicular to the end plate (305); an upper cover plate III (302) and a lower cover plate III (303) are welded between the two vertical connecting plates (301); a groove II is formed between the two vertical connecting plates (301) and the end plate (305), the upper cover plate III (302) and the lower cover plate III (303); The upper cover plate III (302) and the lower cover plate III (303) are arranged in parallel, and the upper cover plate III (302) is located above the lower cover plate III (303); the length of the upper cover plate III (302) is greater than the length of the lower cover plate III (303), and one end of the upper cover plate III (302) extends out of the groove II; The lower cover plate Ⅲ (303) has a plurality of bolt holes Ⅲ (3031) spaced apart on its surface. The vertical connecting plate (301) is provided with a plurality of pin connecting holes II (304) at intervals. During assembly, one end of the energy-consuming module (1) is embedded in the groove II. At this time, the upper cover plate III (302) and the lower cover plate III (303) are located above the upper cover plate I (101) and the lower cover plate I (102), respectively. The pin connection holes (304) II on the vertical connecting plates (301) on both sides correspond to the two ends of the round steel pipe (105). The pin (4) passes through the vertical connecting plate (301) on one side, the round steel pipe (105) and the vertical connecting plate (301) on the other side in sequence for positioning. The bolt hole I (1021) on the lower cover plate I (102) extending into the groove II is aligned with the bolt hole III (3031) on the lower cover plate III (303). The energy-consuming module (1) and the precast concrete composite beam end structure (3) are fastened by the unidirectional high-strength bolt (5).

7. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The shape of the energy-consuming rubber block (107) is adapted to the shape of the chamber; the energy-consuming rubber block (107) is generally in the shape of a square ring structure and is attached to the side wall of the chamber; the side wall of the chamber includes the side wall of the upper cover plate I (101), the side wall of the lower cover plate I (102) and the side wall of the end sealing plate (103) inside the chamber. The energy-consuming rubber block (107) is fixed by a double fixation method: The energy-consuming rubber block (107) is attached to the side wall of the chamber using an adhesive; The energy-consuming rubber block (107) is provided with several through holes spaced apart; when pouring concrete, the concrete is injected into the through holes to fix the energy-consuming rubber block (107).

8. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that: The pin (4) can be made of low-alloy high-strength structural steel or alloy structural steel.

9. The detachable and replaceable prefabricated steel-concrete composite structure beam-column energy-dissipating connection node according to claim 1, characterized in that, The method for manufacturing the energy-consuming module (1) includes the following steps: S1. The frame structure of the welding energy-consuming module (1) includes an upper cover plate I (101), a lower cover plate I (102), an end cap plate (103), a web plate (104), and a round steel pipe (105); the web plate (104) divides the frame structure into two chambers; S2. Several cylindrical head studs (106) are welded to the web plate (104); S3. Attach energy-dissipating rubber blocks (107) to the inner wall of one side chamber; then place a steel mesh in the same side chamber and pour concrete. S4. After the concrete has cured and solidified to 70% of its strength, repeat step S3) to complete the fabrication of the energy-consuming rubber block and reinforced concrete for the other side chamber.

10. A method for replacing the energy-dissipating connection node of a prefabricated steel-concrete composite beam-column structure as described in claims 1-9, characterized in that: When the energy dissipation module (1) is damaged under earthquake action, it needs to be replaced. The replacement includes the following steps: S1. Temporary supports are installed around the precast concrete composite beam (308); S2. Remove the pin (4) and the one-way high-strength bolt (5) to disassemble the damaged energy-consuming module (1). S3. Clean the bolt holes II (2041) and pin connection holes I (205) on the steel-concrete composite shear wall / irregular column connection structure (2), and the bolt holes III (3031) and pin connection holes II (304) on the precast concrete composite beam end structure (3); S4. Place the new energy-consuming module (1) into the connection area, and after accurate alignment, put the pin (4) back in and fix it with a one-way high-strength bolt (5). S5. Remove the temporary supports set around the precast concrete composite beam (308).

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