Replaceable beam-column seismic joint structure

Abstract

This invention discloses a replaceable beam-column seismic joint structure, including a web in the vertical direction, end plates fixedly connected to the left and right ends of the web, flanges horizontally arranged at the upper and lower ends of the web, and a connecting assembly connected to the flanges and the web. The connecting assembly includes a groove in the middle of the upper and lower sides of the web, a connecting shell connected to the groove by a snap-fit ​​body, a receiving groove in the connecting shell, and a rubber block in the receiving groove for filling the receiving groove. The upper and lower sides of the connecting shell contact the web and the flange respectively to achieve large deformation of the joint structure to consume a large amount of external energy. The flange is a corrugated flange. By weakening the connection between the web and the corrugated flange, the plastic hinge of the beam is controlled to move outward to the joint, achieving the design goal of strong joint and weak member. Under seismic action, the plastic hinge rotates, and the good deformation capacity of the corrugated flange and rubber is used to consume seismic energy.

Description

Technical Field

[0001] This invention relates to the field of seismic-resistant structural technology, specifically to a replaceable beam-column seismic-resistant joint structure. Background Technology

[0002] With the rapid development of science and technology, the construction industry has conducted more research on disaster prevention and mitigation during the process of building design and construction. Through reasonable conceptual design, the damage to structures caused by earthquakes can be reduced, and casualties caused by structural damage can be avoided as much as possible.

[0003] Currently, most focus on replaceable joints is on how to quickly replace them after damage, with less attention paid to the transfer of plastic hinges. The location of plastic hinges cannot be freely controlled, thus presenting certain shortcomings. For example, Chinese patent application CN202022791063.7 discloses a replaceable prefabricated composite structural beam-column joint connection device after an earthquake. The main body of the connection device includes a cylinder, an upper flange, a lower flange, and two webs. The upper flange is connected between the upper flange of the cantilever beam and the upper flange of the steel beam using friction-type high-strength bolts, and the lower flange is connected between the lower flange of the cantilever beam and the lower flange of the steel beam using friction-type high-strength bolts. The two webs are respectively connected to the webs of the cantilever beam and the steel beam. This patent achieves the organic combination of replaceability and energy dissipation by strengthening the beam ends and weakening the webs to realize the outward movement of the plastic hinge. However, there is no soft connection between the upper and lower flanges and the webs in this patent, making it impossible to dissipate a large amount of external energy during large deformation of the joint.

[0004] Therefore, providing a replaceable beam-column seismic joint structure that can achieve large deformation of the node and consume a large amount of external energy has become a problem worthy of research. Summary of the Invention

[0005] The purpose of this invention is to provide a replaceable beam-column seismic joint structure that can achieve large deformation of the node and consume a large amount of external energy.

[0006] The objective of this invention is achieved as follows:

[0007] A replaceable beam-column seismic joint structure includes a web in the vertical direction, end plates fixedly connected to the left and right ends of the web, flanges horizontally arranged at the upper and lower ends of the web, and a connecting assembly connected to the flanges and the web. The connecting assembly includes a groove in the middle of the upper and lower sides of the web, a connecting shell connected to the groove by a snap-fit ​​body, a receiving groove in the connecting shell, and a rubber block in the receiving groove for filling the receiving groove. The upper and lower sides of the connecting shell contact the web and the flange respectively to achieve large deformation of the joint structure and consume a large amount of external energy. The flange is a corrugated flange.

[0008] The flange includes a corrugated plate and horizontal plates fixedly connected to the left and right ends of the corrugated plate. The connecting shell is in contact with the corrugated plate and the horizontal plates. The horizontal plates located on the left and right sides of the corrugated plate are welded and fixed to the left and right sides of the web plate.

[0009] Two connection components are provided, and the two connection components are arranged symmetrically.

[0010] The top of the connecting shell located on the upper side of the web plate is connected to the lower surface of the corrugated plate. The position where the connecting shell contacts the corrugated plate is corrugated, and the position where the top of the rubber block contacts the corrugated plate is corrugated.

[0011] The number of the buckle bodies is the same as the number of the grooves, and their positions correspond to each other.

[0012] The buckle body located on the upper side of the web includes a first buckle block located on the lower part of the front and rear sides of the groove, and a second buckle block located on the bottom of the front and rear sides of the connecting shell. The first buckle block is located above the second buckle block and they are engaged.

[0013] The rubber block is provided in three parts, which are located in the groove and on the front and rear sides of the web plate, respectively.

[0014] The end plate is provided with several mounting holes, and the beam end is connected to the end plate through the mounting holes and bolt assembly.

[0015] The beneficial effects of this invention are as follows: 1. This invention consists of several high-strength bolts, end plates, web plates, flange plates, and connecting components. By weakening the connection between the steel beam web plate and the corrugated flange plate, the plastic hinge of the beam is controlled to move outward to this node, achieving the design goal of strong node and weak member. Under seismic action, the plastic hinge rotates, and the good deformation capacity of the corrugated flange plate and rubber is used to consume seismic energy. Since the flange is corrugated, it has a large longitudinal expansion and contraction deformation capacity. The tensile load is transmitted to the web plate through the web plate connecting plate, and the compressive load is transmitted to the web plate through the high-performance rubber filler. Therefore, under the action of cyclic load, the lower flange at this position is stretched and the upper flange is compressed, thereby achieving large deformation of the node to consume a large amount of external energy, reducing seismic action, mitigating structural damage under seismic action, and protecting human life and property safety.

[0016] 2. The node of this invention is fixed to the structure by two end plates and several high-strength bolts, which can realize quick installation and replacement, and can better achieve the seismic performance design goal of being repairable in moderate earthquakes and not collapsing in major earthquakes.

[0017] 3. Compared with the weakened dog bone joint, this invention not only achieves the goal of plastic hinge displacement of the dog bone joint, but also improves the energy dissipation capacity of the joint. In addition, when the joint structure is damaged, the joint can be quickly replaced by removing the bolts on the connecting plates at both ends, so that the overall structure can be restored to the design requirements as soon as possible, reducing the overall maintenance time, reducing the impact of damage, and achieving higher social and economic benefits. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 for Figure 1 The left view;

[0020] Figure 3 This is a cross-sectional view along the AA direction;

[0021] Figure 4 This is a schematic diagram of the web structure of the present invention;

[0022] Figure 5 This is a cross-sectional view of the web along the AA direction;

[0023] Figure 6 This is a cross-sectional view of the shell connected in the AA direction;

[0024] In the figure: web plate 1, end plate 2, flange plate 3, connecting assembly 4, corrugated plate 5, horizontal plate 6, mounting hole 7, groove 8, connecting shell 41, first limiting block 42, receiving groove 43, second limiting block 44, rubber block 45. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0026] like Figures 1 to 6 As shown, a replaceable beam-column seismic joint structure includes a vertically positioned web 1, end plates 2 fixedly connected to the left and right ends of the web 1, horizontally positioned flange plates 3 at the upper and lower ends of the web 1, and connecting components 4 connecting the flange plates 3 and the web 1. The upper and lower flange plates 3 are symmetrically arranged, and two connecting components 4 are provided, symmetrically positioned vertically. The end plates are provided with several mounting holes 7, and the beam ends are connected to the end plates on site through the mounting holes 7 and bolt assemblies. This structure offers high construction efficiency, reduces on-site welding work, enables rapid installation and replacement, and better achieves the seismic performance design goal of being repairable in moderate earthquakes and resistant to collapse in major earthquakes.

[0027] The connecting assembly 4 includes a groove 8 located in the middle of the upper and lower sides of the web plate 1, a connecting shell 41 connected to the groove 8 by a snap-fit ​​body, a receiving groove 43 located in the connecting shell 41, and a rubber block 45 located in the receiving groove 43 and used to fill the receiving groove 43. The connecting shell 41 is composed of two connecting plates, front and rear. The top of the two connecting plates is welded and fixed to the lower surface of the flange plate 3. The receiving groove 43 is a cylindrical groove, that is, the top of the receiving groove 43 is connected to the lower surface of the flange plate 3, and the bottom of the receiving groove 43 is through which the web plate 1 passes. The upper and lower sides of the connecting shell 41 contact the web plate 1 and the flange plate 3 respectively to achieve large deformation of the node structure and consume a large amount of external energy. The contact part between the connecting shell 41 and the flange plate 3 is fixed by welding, and the connecting shell 41 and the web plate 1 are in contact by snap-fit ​​body. The lower part of the connecting shell 41 located on the upper side of the web plate is connected to the web plate 1 through rubber blocks 45 and buckles, which can slide up and down and be fixed left and right. Three rubber blocks 45 are provided. One rubber block 45 is located in the groove 8 of the web plate 1 and its top contacts the flange plate 3. The other two rubber blocks 45 are located on the front and rear sides of the web plate 1. The rubber blocks 45 only function under pressure, which reduces the constraint of the flange plate 3 on the web plate 1, thereby realizing the weakening design of the node.

[0028] The flange plate 3 is a corrugated flange plate, which includes a corrugated plate 5 and horizontal plates 6 that are fixedly connected to the left and right ends of the corrugated plate 5 by welding. The connecting shell 41 contacts the corrugated plate 5 and the horizontal plates 6. The horizontal plates 6 located on the left and right sides of the corrugated plate 5 are fixedly connected to the left and right sides of the web plate 1 by welding. The part of the connecting shell 41 that contacts the corrugated plate 5 is corrugated, and the part of the rubber block 45 that contacts the corrugated plate 5 is corrugated. The corrugated shape of the rubber block 45 matches the corrugated shape of the corrugated plate 5. Because the flange plate 3 is corrugated, it has a large longitudinal expansion and contraction deformation capacity. The tensile load is transmitted to the web plate 1 through the connecting component 4, and the compressive load is transmitted to the web plate 1 through the high-performance rubber block 45 filler. Therefore, under the action of reciprocating load, the flange plate 3 located at the lower position is stretched, and the flange plate located at the upper position is compressed, thereby achieving large deformation of the node and consuming a large amount of external energy. This invention has a clear design concept and a simple structure, allowing for pre-design and fabrication in the factory. This ensures component quality and enables modular production. Under seismic loading, the plastic hinges rotate, utilizing the excellent deformation capacity of the corrugated flanges and rubber to dissipate seismic energy, reducing seismic forces and mitigating structural damage, thus protecting human life and property. Example 2

[0029] like Figures 1 to 6As shown, a replaceable beam-column seismic joint structure includes a vertically positioned web 1, end plates 2 fixedly connected to the left and right ends of the web 1, horizontally positioned flange plates 3 at the upper and lower ends of the web 1, and connecting components 4 connecting the flange plates 3 and the web 1. The upper and lower flange plates 3 are symmetrically arranged, and two connecting components 4 are provided, symmetrically positioned vertically. The end plates are provided with several mounting holes 7, and the beam ends are connected to the end plates on site through the mounting holes 7 and bolt assemblies. This structure offers high construction efficiency, reduces on-site welding work, enables rapid installation and replacement, and better achieves the seismic performance design goal of being repairable in moderate earthquakes and resistant to collapse in major earthquakes.

[0030] The connecting assembly 4 includes a groove 8 located in the middle of the upper and lower sides of the web plate 1, a connecting shell 41 connected to the groove 8 by a snap-fit ​​body, a receiving groove 43 located in the connecting shell 41, and a rubber block 45 located in the receiving groove 43 and used to fill the receiving groove 43. The connecting shell 41 is composed of two connecting plates, front and rear. The top of the two connecting plates is welded and fixed to the lower surface of the flange plate 3. The receiving groove 43 is a cylindrical groove, that is, the top of the receiving groove 43 is connected to the lower surface of the flange plate 3, and the bottom of the receiving groove 43 is through which the web plate 1 passes. The upper and lower sides of the connecting shell 41 contact the web plate 1 and the flange plate 3 respectively to achieve large deformation of the node structure and consume a large amount of external energy. The contact part between the connecting shell 41 and the flange plate 3 is fixed by welding, and the connecting shell 41 and the web plate 1 are in contact by snap-fit ​​body. The lower part of the connecting shell 41 located on the upper side of the web plate is connected to the web plate 1 through rubber blocks 45 and buckles, which can slide up and down and be fixed left and right. Three rubber blocks 45 are provided. One rubber block 45 is located in the groove 8 of the web plate 1 and its top contacts the flange plate 3. The other two rubber blocks 45 are located on the front and rear sides of the web plate 1. The rubber blocks 45 only function under pressure, which reduces the constraint of the flange plate 3 on the web plate 1, thereby realizing the weakening design of the node.

[0031] The flange plate 3 is a corrugated flange plate, which includes a corrugated plate 5 and horizontal plates 6 that are fixedly connected to the left and right ends of the corrugated plate 5 by welding. The connecting shell 41 contacts the corrugated plate 5 and the horizontal plates 6. The horizontal plates 6 located on the left and right sides of the corrugated plate 5 are fixedly connected to the left and right sides of the web plate 1 by welding. The part of the connecting shell 41 that contacts the corrugated plate 5 is corrugated, and the part of the rubber block 45 that contacts the corrugated plate 5 is corrugated. The corrugated shape of the rubber block 45 matches the corrugated shape of the corrugated plate 5. Because the flange plate 3 is corrugated, it has a large longitudinal expansion and contraction deformation capacity. The tensile load is transmitted to the web plate 1 through the connecting component 4, and the compressive load is transmitted to the web plate 1 through the high-performance rubber block 45 filler. Therefore, under the action of reciprocating load, the flange plate 3 located at the lower position is stretched, and the flange plate located at the upper position is compressed, thereby achieving large deformation of the node and consuming a large amount of external energy. This invention has a clear design concept and a simple structure, allowing for pre-design and fabrication in the factory. This ensures component quality and enables modular production. Under seismic loading, the plastic hinges rotate, utilizing the excellent deformation capacity of the corrugated flanges and rubber to dissipate seismic energy, reducing seismic forces and mitigating structural damage, thus protecting human life and property.

[0032] The number of the snap-fit ​​bodies is the same as the number of the grooves 8 and their positions correspond to each other. The snap-fit ​​bodies located on the upper side of the web include a first snap-fit ​​block 42 located on the lower part of the front and rear sides of the groove 8 and a second snap-fit ​​block 44 located on the bottom of the front and rear sides of the connecting shell 41. The first snap-fit ​​block 42 is located below the second snap-fit ​​block 44 and is snap-fitted. The lower part of the connecting shell 41 is connected to the web 1 through a rubber block 45 and the first snap-fit ​​block 42 and the second snap-fit ​​block 44, which can slide up and down and be fixed left and right. The rubber block 45 only functions under pressure, which reduces the constraint of the flange plate 3 on the web 1, thereby realizing the weakening design of the node.

[0033] This invention comprises several high-strength bolts, end plates, web plates, flange plates, and connecting components. By weakening the connection between the web plate and the corrugated flange plate, the plastic hinge of the beam is controlled to shift outward to this node, achieving the design goal of strong node and weak member. Under seismic loading, the plastic hinge rotates, and the good deformation capacity of the corrugated flange plate and rubber is used to dissipate seismic energy. Since the flange is corrugated, it has a large longitudinal expansion and contraction deformation capacity. Tensile loads are transferred to the web plate through the web plate connecting plate, and compressive loads are transferred to the web plate through the high-performance rubber filler. Therefore, under cyclic loading, the lower flange at this position is stretched and the upper flange is compressed, thereby achieving large deformation of the node to dissipate a large amount of external energy, reducing seismic loading, mitigating structural damage under seismic loading, and protecting human life and property.

[0034] The node of this invention is fixed to the structure by two end plates and several high-strength bolts, which can realize quick installation and replacement, and can better achieve the seismic performance design goal of being repairable in moderate earthquakes and not collapsing in major earthquakes.

[0035] Compared with the weakened dog bone joint, this invention achieves the goal of plastic hinge displacement of the dog bone joint and improves the energy dissipation capacity of the joint. In addition, when the joint structure is damaged, the joint can be quickly replaced by removing the bolts on the connecting plates at both ends, so that the overall structure can be restored to the design requirements as soon as possible, reducing the overall maintenance time, reducing the impact of damage, and achieving higher social and economic benefits.

Claims

1. A replaceable beam-column seismic joint structure, characterized in that: It includes a web in the vertical direction, end plates fixedly connected to the left and right ends of the web, flanges located at the upper and lower ends of the web and horizontally arranged, and a connecting assembly connected to the flanges and the web. The connecting assembly includes a groove located in the middle of the upper and lower sides of the web, a connecting shell connected to the groove through a snap-fit ​​body, a receiving groove located in the connecting shell, and a rubber block located in the receiving groove for filling the receiving groove. The upper and lower sides of the connecting shell contact the web and the flange respectively to achieve large deformation of the node structure to consume a large amount of external energy. The flange is a corrugated flange.

2. The replaceable beam-column seismic joint structure according to claim 1, characterized in that: The flange includes a corrugated plate and horizontal plates fixedly connected to the left and right ends of the corrugated plate. The connecting shell is in contact with the corrugated plate and the horizontal plates. The horizontal plates located on the left and right sides of the corrugated plate are welded and fixed to the left and right sides of the web plate.

3. The replaceable beam-column seismic joint structure according to claim 1, characterized in that: Two connection components are provided, and the two connection components are arranged symmetrically.

4. The replaceable beam-column seismic joint structure according to claim 2, characterized in that: The top of the connecting shell located on the upper side of the web plate is connected to the lower surface of the corrugated plate. The position where the connecting shell contacts the corrugated plate is corrugated, and the position where the top of the rubber block contacts the corrugated plate is corrugated.

5. The replaceable beam-column seismic joint structure according to claim 1, characterized in that: The number of the buckle bodies is the same as the number of the grooves, and their positions correspond to each other.

6. The replaceable beam-column seismic joint structure according to claim 5, characterized in that: The buckle body located on the upper side of the web includes a first buckle block located on the lower part of the front and rear sides of the groove, and a second buckle block located on the bottom of the front and rear sides of the connecting shell. The first buckle block is located above the second buckle block and is engaged with it.

7. The replaceable beam-column seismic joint structure according to claim 1, characterized in that: The rubber block is provided in three parts, which are located in the groove and on the front and rear sides of the web plate, respectively.

8. The replaceable beam-column seismic joint structure according to claim 1, characterized in that: The end plate is provided with several mounting holes, and the beam end is connected to the end plate through the mounting holes and bolt assembly.

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