Assembly type frame structure beam column H-shaped energy dissipation connecting structure

Abstract

The invention discloses an assembly type frame structure beam column H-shaped energy dissipation connecting structure which comprises two energy dissipation connecting assemblies, a first end plate, a second end plate and an embedded steel plate. Each energy dissipation connecting assembly comprises a column side connecting piece, an H-shaped energy dissipation piece and a beam side connecting piece; the first end plate is connected to the column side connecting piece and is fixed to a beam column mounting position of a to-be-assembled prefabricated column during assembly; the second end plate is installed on the other side, opposite to the first end plate, of the prefabricated column, and the embedded steel plate is connected to the beam side connecting piece and fixed to the end of the prefabricated beam to be assembled during assembling; the H-shaped energy dissipation piece is connected with the column side connecting piece through a plurality of bolt rods, each bolt rod is sleeved with a plurality of disc spring gaskets, the disc spring gaskets can consume vibration energy through deformation, and the two ends of each bolt rod are fastened through nuts. Under the action of earthquake load, the H-shaped energy dissipation piece can consume most earthquake energy, damage to concrete at the beam end is reduced, and repair and replacement after an earthquake are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled concrete buildings, and in particular relates to an H-shaped energy-absorbing connection structure of beams and columns of an assembled frame structure. Background Art

[0002] In recent years, with the rapid development of prefabricated buildings in my country, dry connection technology has attracted extensive attention from scholars because of its less wet work, convenient on-site construction and installation, and meeting the development concept of green, environmentally friendly, energy-saving and efficient prefabricated buildings. At present, the existing dry connection node technology of prefabricated concrete frame structure has the following problems:

[0003] (1) The part where the prefabricated beams and columns are connected is called the core area of ​​the node. It is the key part of the main structure that is subjected to stress. It is in a state of combined stress of bending moment, shear force and axial force in the structure. Under the action of earthquake, how to realize the design concept of "strong column and weak beam, strong node and weak member", that is, the plastic hinge at the beam end appears before the column end, to ensure the integrity of the core area of ​​the node, is one of the main problems that need to be solved in the design of frame structures. On this basis, through certain measures, while ensuring the appearance of plastic hinge at the beam end, it is also possible to realize the replacement and repairability of the components after the earthquake, so that the structure has the ability to self-reset and dissipate energy, which is the key direction of the development of prefabricated frame structures.

[0004] (2) The dry node connection structures currently proposed mainly include bolt connection, welding connection, grouting sleeve connection, prestressed connection and bracket connection. Bolt connection is usually used in steel structures. How to apply bolt connection in concrete structure and increase its initial stiffness is one of the main difficulties in structural design; welding connection is mainly used in steel structure. This connection needs to be operated on site, which requires high technical level of welders and difficult to ensure construction quality; grouting sleeve connection is a steel bar connection method recommended in the specification. Its main problems are that it is difficult to install and position, the construction quality is difficult to detect, and there are safety hazards; the construction, calculation and structure of prestressed connection components are relatively complex, the energy dissipation capacity is relatively weak, and the residual deformation after earthquake is relatively large; bracket connection is divided into open bracket connection and hidden bracket connection. The open bracket occupies a large space and has poor appearance when exposed to the outside. The hidden bracket will inevitably affect the mechanical properties of the component due to aesthetic considerations. At the same time, the reinforcement of the beam end and the bracket is relatively complex.

[0005] (3) If the core area of ​​the node or the column end is damaged before the beam end, the ductility of the structure will be significantly reduced, resulting in rapid damage to the structural components under earthquake action, or even collapse. Therefore, the bearing capacity of the node must achieve a balance. When a strong earthquake occurs, the beam end needs to be damaged in time to produce a plastic hinge, but it must also be ensured that it is not affected by small earthquakes and wind shocks, so that the node damage can be controlled. Although measures such as increasing the strength grade of the concrete in the core area of ​​the node, increasing the configuration of stirrups in the core area of ​​the node, and strengthening the constraints on the core area of ​​the node can effectively improve the bearing capacity, these measures all have problems such as being difficult to repair and uneconomical.

[0006] Therefore, it is of great significance to the development of prefabricated buildings to study and develop a dry connection node that conforms to the design principle of "strong columns and weak beams, strong nodes and weak components", can reduce the damage to the concrete end of the beam in the core area of ​​the node, is simple to assemble and replaceable, has a wide range of economic applications, can effectively dissipate seismic energy, and can achieve self-reset with small deformation. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides an H-type energy-absorbing connection structure for beams and columns of an assembled frame structure. The H-type energy-absorbing connector is applied to the beam-column connection of the assembled frame, which can meet the needs of building design and construction, dissipate a large amount of seismic energy under the action of seismic loads, reduce the concrete damage at the beam end of the node core area, and achieve the purpose of self-reset. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0008] The present invention provides an H-shaped energy-absorbing connection structure of beams and columns of an assembled frame structure, comprising two energy-absorbing connection components, a first end plate, a second end plate and an embedded steel plate, wherein:

[0009] The energy-absorbing connection assembly includes a column-side connection piece, an H-shaped energy-absorbing piece, and a beam-side connection piece, wherein the first end plate is connected to the column-side connection piece and fixed to the beam-column installation position of the prefabricated column to be assembled during assembly; the second end plate is installed on the other side of the prefabricated column opposite to the first end plate, and the embedded steel plate is connected to the beam-side connection piece and fixed to the end of the prefabricated beam to be assembled during assembly;

[0010] The H-shaped energy absorbing part is connected to the column side connecting part through a plurality of bolt rods, and a plurality of disc spring washers are sleeved on each bolt rod. The disc spring washers can consume vibration energy through deformation, and the two ends of the bolt rod are fastened by nuts.

[0011] In one embodiment of the present invention, a plurality of common longitudinal bars and a plurality of prestressed bars are arranged inside the precast beam, and the middle part of the end to be installed of the precast beam includes a protrusion, wherein:

[0012] On the upper and lower sides of the protruding part, a step part is respectively formed, and a pre-embedded steel plate is pre-embedded on the side surface of each step part. And a plurality of ordinary longitudinal bars in the beam are located at the upper and lower ends of the precast beam. The ends of the ordinary longitudinal bars in the beam pass through the pre-embedded steel plate and are fastened by nuts;

[0013] The prestressed tendons are arranged in parallel between the ordinary longitudinal bars in the beam at the upper and lower ends. And the ends of the prestressed tendons extend out of the protruding part and can be fixed to the first end plate during assembly.

[0014] In an embodiment of the present invention, two arc-shaped groove steel plates are installed on one side surface of the first end plate close to the energy dissipation connection assembly. Among them,

[0015] Each arc-shaped groove steel plate includes an arc surface, and the two arc surfaces are arranged opposite to each other. Two installation holes are opened on the arc surface of each arc-shaped groove steel plate. During assembly, the prestressed tendon can pass through the installation holes on the corresponding arc-shaped groove steel plate and be fixed to the first end plate by a nut.

[0016] In an embodiment of the present invention, a fillet is respectively formed between the upper surface and the end surface of the protruding part and between the lower surface and the end surface. The radian of the fillet is equal to the radian of the arc surface of the arc-shaped groove steel plate; Four prestressed tendons are arranged inside the precast beam. Among them, the ends of two prestressed tendons extend out from the fillet at the upper end, and the other two prestressed tendons extend out from the fillet at the lower end.

[0017] In an embodiment of the present invention, during assembly, the column-side connectors of the two energy dissipation connection assemblies are respectively fixed to the outside of one of the arc-shaped groove steel plates; The end of the protruding part of the precast beam is clamped between the arc surfaces of the two energy dissipation connection assemblies.

[0018] In an embodiment of the present invention, a steel sleeve hoop is sleeved at the connection position of the precast column. During assembly, the first end plate and the second end plate are fixed to the outside of the steel sleeve hoop. And after assembly is completed, grouting is carried out between the steel sleeve hoop and the first end plate, and between the steel sleeve hoop and the second end plate.

[0019] In an embodiment of the present invention, the H-shaped energy dissipation member includes a first connection part, a second connection part and an intermediate part. Among them,

[0020] Both the first connection part and the second connection part are plate-shaped and arranged in parallel. The intermediate part is vertically connected between the first connection part and the second connection part;

[0021] A plurality of first through holes are formed in the first connecting portion, and a plurality of second through holes are formed at corresponding positions of the column-side connecting member. A bolt rod is disposed in the first through hole and the second through hole at the corresponding position. A plurality of disc spring washers are sleeved on one side of the bolt rod where the H-shaped energy dissipating member is located and on one side of the column-side connecting member, and both ends of the bolt rod are fastened by nuts.

[0022] The middle portion is integrally plate-shaped, and a plurality of uniformly arranged energy dissipating member strips are formed on the plate surface of the middle portion.

[0023] In an embodiment of the present invention, long strip-shaped gaps are further formed on the side walls between adjacent energy dissipating member strips of the middle portion.

[0024] In an embodiment of the present invention, the column-side connecting member and the arc-shaped groove steel plate are both connected to the first end plate by welding; the beam-side connecting member is connected to the embedded steel plate by welding.

[0025] In an embodiment of the present invention, the column-side connecting member includes a first arm portion, a second arm portion, and a third arm portion that are sequentially vertically connected. Among them, the second arm portion is connected to the energy dissipating connection assembly, and the first arm portion and the third arm portion are respectively connected to the first end plate.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. The end plate connection of the present invention enhances the shear resistance of the joint core area. When an earthquake occurs, the design concept of "strong joint, weak member" can be realized. The energy dissipating connection assembly controls the occurrence of plastic hinges at the beam end of the joint, realizing the design principle of "strong column, weak beam". Under the action of earthquake loads, the energy dissipating connection assembly can consume most of the earthquake energy, reduce the damage of the beam-end concrete, and moreover, the design of the energy dissipating connection assembly is convenient for post-earthquake repair and replacement.

[0028] 2. The present invention anchors the prestressed tendons on the first end plate of the joint core area, which is different from the traditional method of directly anchoring on the precast column, improves the seismic performance of the joint, enables the precast beam to have self-centering ability, and the traditional prestressed tendons are all post-tensioned on site, with great construction difficulty. However, the present invention can complete the tensioning of the prestressed tendons in the precast factory first, avoiding complex construction.

[0029] 3. The connection method of the H-shaped energy-dissipating connection structure for beam-column in the prefabricated frame structure of the present invention takes the H-shaped energy-dissipating component as the main body, and components such as disc spring gaskets together achieve seismic resistance with multiple defense lines. When an earthquake occurs, the column-side connector using low-yield steel can make the deformation mainly concentrated at the position of the H-shaped energy-dissipating component, avoiding damage to the concrete at the beam end. When a minor earthquake occurs, first, the disc spring gasket in the fixed sleeve deforms to consume seismic energy. When a moderate earthquake occurs, the multi-slit strips of the H-shaped energy-dissipating component deform to dissipate energy, and the strips yield and break in stages. Even when all the strips of the H-shaped energy-dissipating component are broken during a major earthquake, the precast beam still remains intact, ensuring the safety of the main structure to the greatest extent.

[0030] 4. The connection method of the H-shaped energy-dissipating connection structure for beam-column in the prefabricated frame structure of the present invention can effectively improve the ability of the reinforced concrete structure to resist residual deformation. When an earthquake occurs, the components are less damaged, and it can still maintain good self-centering ability after the earthquake. Even if the H-shaped energy-dissipating component is completely damaged, it can be quickly replaced, which has a positive significance for the seismic performance and service life of the structure. The H-shaped energy-dissipating connection structure for beam-column in the prefabricated frame structure can be completely hidden under the building finish surface, without affecting the subsequent construction of the building and the aesthetics of the structure.

[0031] The present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0032] Figure 1 It is an assembly schematic diagram of a precast column provided by an embodiment of the present invention;

[0033] Figure 2 It is a structural schematic diagram of a precast beam provided by an embodiment of the present invention;

[0034] Figure 3 It is a structural schematic diagram of an H-shaped energy-dissipating connection structure for beam-column of a self-centering prefabricated frame structure provided by an embodiment of the present invention;

[0035] Figure 4 It is a structural schematic diagram of an H-shaped energy-dissipating component provided by an embodiment of the present invention;

[0036] Figure 5 It is an installation schematic diagram of a precast column and a precast beam provided by an embodiment of the present invention;

[0037] Figure 6 It is an installation schematic diagram of a first end plate and an arc-shaped groove steel plate provided by an embodiment of the present invention.

[0038] Description of the reference numerals:

[0039] 1 - Energy - dissipating connection component; 11 - Column - side connecting piece; 12 - H - shaped energy - dissipating piece; 121 - First connecting part; 122 - Second connecting part; 123 - Intermediate part; 124 - Energy - dissipating strip; 125 - Gap; 13 - Beam - side connecting piece; 14 - Bolt rod; 15 - Disc spring gasket; 16 - Nut; 17 - Fixed sleeve; 18 - Circular gasket; 2 - First end plate; 3 - Second end plate; 4 - Embedded steel plate; 5 - Prefabricated column; 51 - Column longitudinal reinforcement; 52 - Column stirrup; 6 - Prefabricated beam; 61 - Ordinary longitudinal reinforcement in beam; 62 - Prestressed tendon; 63 - Protrusion; 64 - Step; 65 - Fillet; 66 - Beam stirrup; 7 - Arc - shaped grooved steel plate; 71 - Arc surface; 72 - Installation hole; 8 - Steel sleeve hoop; 9 - High - strength grouting material. Specific embodiments

[0040] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and specific embodiments, will provide a detailed description of an H - shaped energy - dissipating connection structure for beam - column of an assembled frame structure according to the present invention.

[0041] The foregoing and other technical contents, features, and effects of the present invention can be clearly presented in the following detailed description in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in - depth and specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and illustration purposes and are not used to limit the technical solutions of the present invention.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant is intended to cover non - exclusive inclusion, so that an article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the said element.

[0043] This embodiment provides an H - shaped energy - dissipating connection structure for beam - column of an assembled frame structure. Please also refer to Figures 1 to 3, the connection structure includes two energy dissipation connection components 1, a first end plate 2, a second end plate 3 and a pre-embedded steel plate 4. Among them, the energy dissipation connection component 1 includes a column-side connecting piece 11, an H-shaped energy dissipation member 12 and a beam-side connecting piece 13. The first end plate 2 is connected to the column-side connecting piece 11 and fixed to the beam-column installation position of the precast column 5 to be assembled during assembly; the second end plate 3 is installed on the other side of the precast column 5 opposite to the first end plate 2, and the pre-embedded steel plate 4 is connected to the beam-side connecting piece 13 and fixed to the end of the precast beam 6 to be assembled during assembly; the H-shaped energy dissipation member 12 is connected to the column-side connecting piece 11 through a plurality of bolt rods 14, and a plurality of disc spring washers 15 are sleeved on each bolt rod 14. The disc spring washers 15 can consume vibration energy through deformation, and both ends of the bolt rod 14 are fastened by nuts 16.

[0044] Inside the precast column 5 of this embodiment, there are a plurality of longitudinal column longitudinal bars 51 and a plurality of column stirrups 52 arranged around the column longitudinal bars 51, as Figure 1 shown. The main body of the precast column 5 is a concrete column.

[0045] Furthermore, inside the precast beam 6, there are a plurality of ordinary beam longitudinal bars 61, a plurality of prestressed tendons 62 and a plurality of beam stirrups 66 arranged around the ordinary beam longitudinal bars 61, as Figure 2 shown. The main body of the precast beam 6 is a concrete beam. The middle part of the end to be installed of the precast beam 6 includes a protruding part 63. Among them, a step part 64 is formed on each of the upper and lower sides of the protruding part 63, and a pre-embedded steel plate 4 is pre-embedded on each side surface of the step part 64. And a plurality of ordinary beam longitudinal bars 61 are located at the upper and lower ends of the precast beam 6, and the ends of the ordinary beam longitudinal bars 61 pass through the pre-embedded steel plate 4 and are fastened by nuts; the prestressed tendons 62 are arranged in parallel between the ordinary beam longitudinal bars 61 at the upper and lower ends, and the ends of the prestressed tendons 62 extend out of the protruding part 63 and can be fixed to the first end plate 2 during assembly. That is to say, the two energy dissipation connection components 1 are respectively installed on the upper and lower sides of the protruding part 63, as Figure 5 shown.

[0046] It should be noted that there is no direct bond between the prestressed tendon and the surrounding concrete. The prestressed tendon is inserted into the reserved duct before or after pouring the concrete and can slide freely in the sleeve during tensioning. The tensile force acts directly on the concrete through the anchor, without relying on the surrounding bond force.

[0047] Furthermore, two arc-shaped groove steel plates 7 are installed on the surface of the first end plate 2 close to the energy dissipation connection component 1. Each arc-shaped groove steel plate 7 includes an arc surface 71 and the two arc surfaces 71 are arranged oppositely. Two mounting holes 72 are opened on the arc surface 71 of each arc-shaped groove steel plate 7, as Figure 6As shown, during assembly, the prestressed tendon 62 can pass through the mounting holes 72 on the corresponding arc-shaped grooved steel plate 7 and be fixed to the first end plate 2 with nuts, as Figure 5 shown.

[0048] In this embodiment, as Figure 2 shown, fillets 65 are respectively formed between the upper surface and the end face of the protrusion 63 and between the lower surface and the end face, and the radian of the fillet 65 is equal to the radian of the arc surface 71 of the arc-shaped grooved steel plate 7; four prestressed tendons 62 are arranged inside the precast beam 6. Among them, the ends of two prestressed tendons 62 extend out from the fillets 65 at the upper end, and the ends of the other two prestressed tendons 62 extend out from the fillets 65 at the lower end.

[0049] The contact surface between the arc-shaped grooved steel plate 7 and the protrusion 63 is arc-shaped. The purpose is that when the beam is subjected to vertical force, the arc-shaped grooved steel plate 7 can not only resist shear force, but the contact surface can also have rotational friction energy dissipation to prevent concrete extrusion failure.

[0050] Specifically, four ordinary longitudinal bars 61 in the beam and four prestressed tendons 62 are arranged inside the precast beam 6 of this embodiment. Among them, two ordinary longitudinal bars 61 in the beam are horizontally arranged at the upper end of the precast beam 6, and the ends of these two ordinary longitudinal bars 61 in the beam extend out from the side surfaces of the upper step portion 64 and are fastened to the upper embedded steel plate 4 with high-strength nuts; the other two ordinary longitudinal bars 61 in the beam are horizontally arranged at the lower end of the precast beam 6, and the ends of these two ordinary longitudinal bars 61 in the beam extend out from the side surfaces of the lower step portion 64 and are fastened to the lower embedded steel plate 4 with high-strength nuts, so that the upper and lower step portions form a symmetrical structure.

[0051] Similarly, the four prestressed tendons 62 are located between the ordinary longitudinal bars 61 in the beam on the upper and lower sides, and two prestressed tendons 62 are horizontally arranged at the upper side. The ends of these two prestressed tendons 62 extend out from the fillets 65 at the upper end, and during assembly, pass through the mounting holes 72 on the arc-shaped grooved steel plate 7 at the corresponding positions and the mounting holes reserved at the corresponding positions of the first end plate 2, and are fixed to the first end plate 2 with nuts; the other two prestressed tendons 62 are horizontally arranged at the lower side. The ends of these two prestressed tendons 62 extend out from the fillets 65 at the lower end, and during assembly, pass through the mounting holes 72 on the arc-shaped grooved steel plate 7 at the corresponding positions and the mounting holes reserved at the corresponding positions of the first end plate 2, and are fixed to the first end plate 2 with high-strength nuts. Preferably, a steel sleeve can also be wrapped outside the connection end of the precast beam 6 to enhance the bearing capacity of this area.

[0052] Furthermore, as Figure 5 shown, during assembly, the column-side connectors 11 of the two energy-dissipating connection assemblies 1 are respectively fixed to the outside of one of the arc-shaped grooved steel plates 7; the end of the protrusion 63 of the precast beam 6 is clamped between the arc surfaces 71 of the two energy-dissipating connection assemblies 1.

[0053] Continue to refer to Figure 1 , at the connection position of the precast column 5 of this embodiment, a steel sleeve hoop 8 is sleeved. The steel sleeve hoop 8 is sleeved on the outer periphery of the connection position of the precast column 5, and is used to enhance the overall strength of the beam-column connection position. During assembly, the first end plate 2 and the second end plate 3 are fixed on the opposite sides of the steel sleeve hoop 8, and after the assembly is completed, the space between the steel sleeve hoop 8 and the first end plate 2, and the space between the steel sleeve hoop 8 and the second end plate 3 are grouted with high-strength grouting material 9. Preferably, as Figure 5 and Figure 6 shown, a plurality of through holes are opened at the edges of the first end plate 2 and the second end plate 3. A plurality of bolt rods sequentially pass through the through holes on the first end plate 2, the precast column 5, and the through holes on the second end plate 3, and are fastened by high-strength nuts on both sides of the precast column 5, so as to fix the first end plate 2 and the second end plate 3 on the precast column 5. That is to say, the first end plate 2 and the second end plate 3 are connected by a plurality of high-strength bolt rods passing through the precast column. As described above, the energy dissipation connection assembly 1 is fixed on the first end plate 2, and the precast beam 6 is fixedly connected to the energy dissipation connection assembly 1 through the ordinary longitudinal bars 61 and the prestressed tendons 62 in the beam, and then the assembly connection between the precast column 5 and the precast beam 6 is realized through the energy dissipation connection assembly 1.

[0054] Please refer to Figure 5 , the H-shaped energy dissipation member 12 of this embodiment includes a first connection portion 121, a second connection portion 122, and an intermediate portion 123. Among them, the first connection portion 121 and the second connection portion 122 are both plate-shaped and arranged in parallel, and the intermediate portion 123 is vertically connected between the first connection portion 121 and the second connection portion 122; a plurality of first through holes are opened on the first connection portion 121, and a plurality of second through holes are opened at the corresponding positions of the column-side connecting member 11. Bolt rods 14 are arranged in the first through holes and the second through holes at the corresponding positions. A plurality of disc spring washers 15 are sleeved on one side of the bolt rod 14 of the H-shaped energy dissipation member 12 and one side of the column-side connecting member 11, and both ends of the bolt rod 14 are fastened by nuts 16. In this embodiment, a circular washer 18 is sleeved on one side of the bolt rod 14 of the H-shaped energy dissipation member 12 and one side of the column-side connecting member 11 first, and then a plurality of disc spring washers 15 are sleeved, and the two are sleeved with a fixing sleeve 17, and finally they are fixed to the H-shaped energy dissipation member 12 and the column-side connecting member 11 with high-strength bolts.

[0055] The intermediate portion 123 is integrally plate-shaped, and a plurality of energy dissipation member strips 124 are uniformly arranged on the plate surface of the intermediate portion 123. Further, long strip-shaped gaps 125 are also opened on the side walls between adjacent energy dissipation member strips 124 of the intermediate portion 33. When the precast beam 6 is subjected to tensile and compressive forces in the direction of the beam longitudinal bars, the circular washer 18 and the disc spring washers 15 in the fixing sleeve 17 and the energy dissipation member strips 124 of the H-shaped energy dissipation member 12 can be deformed under force to dissipate energy.

[0056] In addition, both the column-side connecting member 11 and the arc-shaped bevel steel plate 7 are connected to the first end plate 2 by welding; the beam-side connecting member 13 is connected to the embedded steel plate 4 by welding.

[0057] Furthermore, the column-side connecting member 11 is in a similar C shape, including a first arm, a second arm, and a third arm that are vertically connected in sequence. Among them, the second arm is connected to the energy dissipation connection assembly 1, and the end faces of the first arm and the third arm are respectively welded to the first end plate 2. Similarly, the beam-side connecting member 13 is in a similar C shape, including a fourth arm, a fifth arm, and a sixth arm that are vertically connected in sequence. Among them, the fifth arm is connected to the energy dissipation connection assembly 1, and the end faces of the fourth arm and the sixth arm are respectively welded to the embedded steel plate 4.

[0058] The installation steps of the beam-column H-shaped energy dissipation connection structure of the prefabricated frame structure in this embodiment are as follows:

[0059] First, install the first end plate and the second end plate at the position of the steel sleeve hoop of the precast column. The two are connected by high-strength bolt rods passing through the column body. Then, back-weld two arc-shaped bevel steel plates at the corresponding positions of the first end plate. Insert the prestressed tendons into the reserved holes of the first end plate and the prestressed duct in the beam in sequence. After the installation of the precast beam is completed, weld the column-side connecting member to the corresponding position of the first end plate, weld the beam-side connecting member to the embedded steel plate, install the H-shaped energy dissipation member between the column-side connecting member and the beam-side connecting member, and fix it with high-strength bolts, round washers, and disc spring washers. After the installation is completed, use high-strength grouting material to grout the gaps between the first end plate, the second end plate, and the steel sleeve hoop.

[0060] The end - plate connection of the present invention enhances the shear resistance of the joint core area. When an earthquake occurs, it can realize the design concept of "strong joints, weak members". The energy - dissipating connection component controls the occurrence of plastic hinges at the beam ends of the joints, realizing the design principle of "strong columns, weak beams". Under the action of seismic loads, the energy - dissipating connection component can consume most of the seismic energy, reducing the damage of the beam - end concrete. Moreover, the design of the energy - dissipating connection component facilitates post - earthquake repair and replacement. The present invention anchors the prestressed tendons on the first end - plate in the joint core area, which is different from the traditional way of directly anchoring on the precast column, improving the seismic performance of the joint and enabling the precast beam to have self - reset ability. And the traditional prestressed tendons are post - tensioned on - site, with great construction difficulty, while the present invention can complete the tensioning of the prestressed tendons in the precast factory first, avoiding complex construction. The connection method of the H - type energy - dissipating connection structure for beam - column in the prefabricated frame structure of the present invention takes the H - type energy - dissipating component as the main body, and components such as disc spring gaskets together achieve multi - level seismic resistance. When an earthquake occurs, the column - side connecting piece made of low - yield steel can make the deformation mainly concentrate on the position of the H - type energy - dissipating component, avoiding the damage of the beam - end concrete. When a minor earthquake occurs, first the disc spring gasket in the fixed sleeve deforms to consume seismic energy. When a moderate earthquake occurs, the multi - slit strips of the H - type energy - dissipating component deform to dissipate energy, and the strips yield and break in stages. Even when all the strips of the H - type energy - dissipating component are broken during a major earthquake, the precast beam still remains intact, ensuring the safety of the main structure to the greatest extent.

[0061] The connection method of the H - type energy - dissipating connection structure for beam - column in the prefabricated frame structure of the present invention can effectively improve the ability of the reinforced concrete structure to resist residual deformation. When an earthquake occurs, the components are less damaged and can still maintain good self - reset ability after the earthquake. Even if the H - type energy - dissipating component is completely damaged, it can be quickly replaced, which has a positive significance for the seismic performance of the structure and the service life of the building. The H - type energy - dissipating connection structure for beam - column in the prefabricated frame structure can be completely hidden under the building finish surface, without affecting the subsequent construction of the building and the aesthetics of the structure.

[0062] In several embodiments provided by the present invention, it should be understood that the devices and methods disclosed by the present invention can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there can be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0063] In addition, each functional module in various embodiments of the present invention can be integrated in a processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The above - mentioned integrated modules can be implemented in the form of hardware, or in the form of a combination of hardware and software functional modules.

[0064] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An H-shaped energy-dissipating connection structure of beams and columns of an assembled frame structure, characterized in that: It comprises two energy-dissipating connection components (1), a first end plate (2), a second end plate (3) and a pre-buried steel plate (4), wherein: The energy-absorbing connection assembly (1) comprises a column-side connection piece (11), an H-shaped energy-absorbing piece (12) and a beam-side connection piece (13); the first end plate (2) is connected to the column-side connection piece (11) and fixed to the beam-column installation position of the prefabricated column (5) to be assembled during assembly; the second end plate (3) is installed on the other side of the prefabricated column (5) opposite to the first end plate (2); the embedded steel plate (4) is connected to the beam-side connection piece (13) and fixed to the end of the prefabricated beam (6) to be assembled during assembly; The H-shaped energy absorbing member (12) is connected to the column side connecting member (11) via a plurality of bolt rods (14), a plurality of disc spring washers (15) are sleeved on each bolt rod (14), the disc spring washers (15) are capable of absorbing vibration energy through deformation, and the two ends of the bolt rod (14) are fastened via nuts (16).

2. The H-shaped energy dissipation connection structure of beams and columns of the assembled frame structure according to claim 1 is characterized in that: The interior of the prefabricated beam (6) is provided with a plurality of common longitudinal bars (61) and a plurality of prestressed bars (62). The middle portion of the end portion to be installed of the prefabricated beam (6) includes a protruding portion (63), wherein: A step portion (64) is formed on the upper and lower sides of the protruding portion (63), and a pre-embedded steel plate (4) is pre-embedded on the side of each of the step portions (64). The plurality of common longitudinal bars (61) in the beam are located at the upper and lower ends of the prefabricated beam (6), and the ends of the common longitudinal bars (61) in the beam pass through the pre-embedded steel plate (4) and are fastened by nuts. The prestressed tendons (62) are arranged in parallel between the common longitudinal tendons (61) in the upper and lower ends of the beam, and the ends of the prestressed tendons (62) extend out of the protrusions (63) and can be fixed to the first end plate (2) during assembly.

3. The H-shaped energy dissipation connection structure of beams and columns of the assembled frame structure according to claim 2 is characterized in that: Two arc-shaped grooved steel plates (7) are installed on the surface of one side of the first end plate (2) close to the energy dissipation connection assembly (1), wherein: Each arc-shaped grooved steel plate (7) comprises an arc surface (71) and the two arc surfaces (71) are arranged opposite to each other. Two mounting holes (72) are provided on the arc surface (71) of each arc-shaped grooved steel plate (7). During assembly, the prestressed tendons (62) can pass through the mounting holes (72) on the corresponding arc-shaped grooved steel plates (7) and be fixed to the first end plate (2) by nuts.

4. The H-shaped energy dissipation connection structure of beams and columns of the assembled frame structure according to claim 3 is characterized in that: A fillet (65) is formed between the upper surface and the end surface of the protrusion (63) and between the lower surface and the end surface, respectively, and the curvature of the fillet (65) is equal to the curvature of the curved surface (71) of the curved groove steel plate (7); four prestressed tendons (62) are arranged inside the prefabricated beam (6), wherein the ends of two prestressed tendons (62) extend from the fillet (65) at the upper end, and the other two prestressed tendons (62) extend from the fillet (65) at the lower end.

5. The H-shaped energy dissipation connection structure of beams and columns of the assembled frame structure according to claim 3 is characterized in that: During assembly, the column-side connecting pieces (11) of the two energy-absorbing connecting assemblies (1) are respectively fixed to the outer side of one of the arc-shaped grooved steel plates (7); and the end of the protruding portion (63) of the prefabricated beam (6) is clamped between the arc surfaces (71) of the two energy-absorbing connecting assemblies (1).

6. The H-shaped energy dissipation connection structure of beams and columns of an assembled frame structure according to claim 1 is characterized in that: A steel hoop (8) is sleeved at the connection position of the prefabricated column (5). During assembly, the first end plate (2) and the second end plate (3) are fixed on the outside of the steel hoop (8). After assembly, grouting is performed between the steel hoop (8) and the first end plate (2), and between the steel hoop (8) and the second end plate (3).

7. The H-shaped energy dissipation connection structure of beams and columns of an assembled frame structure according to claim 1 is characterized in that: The H-shaped energy absorbing member (12) comprises a first connecting portion (121), a second connecting portion (122) and a middle portion (123), wherein: The first connecting portion (121) and the second connecting portion (122) are both plate-shaped and arranged in parallel, and the middle portion (123) is vertically connected between the first connecting portion (121) and the second connecting portion (122); A plurality of first through holes are formed on the first connection portion (121), and a plurality of second through holes are formed at corresponding positions of the column-side connection member (11), bolt rods (14) are arranged in the first through holes and the second through holes at corresponding positions, a plurality of disc spring washers (15) are sleeved on one side of the H-shaped energy absorbing member (12) and one side of the column-side connection member (11) of the bolt rod (14), and both ends of the bolt rod (14) are fastened by nuts (16); The middle portion (123) is in the shape of a plate as a whole, and a plurality of evenly arranged energy-absorbing component strips (124) are provided on the plate surface of the middle portion (123).

8. The H-shaped energy dissipation connection structure of beams and columns of the assembled frame structure according to claim 7 is characterized in that: A long strip-shaped gap (125) is also provided on the side wall between adjacent energy-absorbing component strips (124) of the middle portion (33).

9. The H-shaped energy dissipation connection structure of beams and columns of an assembled frame structure according to claim 1, characterized in that: The column-side connecting piece (11) and the arc-shaped grooved steel plate (7) are both connected to the first end plate (2) by welding; and the beam-side connecting piece (13) is connected to the embedded steel plate (4) by welding.

10. The H-shaped energy dissipation connection structure of beams and columns of an assembled frame structure according to any one of claims 1 to 9, characterized in that: The column-side connecting member (11) comprises a first arm portion, a second arm portion and a third arm portion which are vertically connected in sequence, wherein the second arm portion is connected to the energy-dissipating connecting component (1), and the first arm portion and the third arm portion are respectively connected to the first end plate (2).

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