CN114922496B - Displacement amplification staged energy consumption self-resetting beam-column joint - Google Patents
Displacement amplification staged energy consumption self-resetting beam-column joint Download PDFInfo
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- CN114922496B CN114922496B CN202210722161.6A CN202210722161A CN114922496B CN 114922496 B CN114922496 B CN 114922496B CN 202210722161 A CN202210722161 A CN 202210722161A CN 114922496 B CN114922496 B CN 114922496B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5812—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/024—Structures with steel columns and beams
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2448—Connections between open section profiles
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- Architecture (AREA)
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- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The application discloses displacement is enlarged and is consumed energy from restoring to throne beam column node by stage relates to building structure energy dissipation shock attenuation technical field. The damper can generate larger damper energy consumption displacement by the same structural deformation, improve the energy consumption capacity of the structure, weaken the expansion effect of the frame, and simultaneously realize staged energy consumption, self-reset and easy recovery after an earthquake. The node comprises a frame column, a cantilever short beam, a frame beam, an energy dissipation damper assembly and an elastic reset piece; two ends of the cantilever short beam are respectively connected with the frame column and the frame beam; the energy consumption damper assembly comprises two energy consumption dampers; the energy consumption damper comprises a first fixed block, a second fixed block, a first energy consumption rod, a second energy consumption rod, a first slider and a second slider; the first fixed block and the second fixed block are fixedly connected to the cantilever short beam; the second slider is positioned below the first slider, and the first slider and the second slider are both connected with the first fixed block in a sliding manner; the elastic restoring member can provide restoring force to the second slider.
Description
Technical Field
The application relates to the technical field of energy dissipation and shock absorption of building structures, in particular to a displacement amplification staged energy consumption self-resetting beam-column node.
Background
The earthquake causes huge economic loss, mainly because the construction is seriously damaged during the earthquake, the earthquake is difficult to repair and can only be overturned for reconstruction; or the building function is interrupted due to the need of repair and the long repair time, which directly affects the production and life of people. Therefore, it becomes a hot point to realize the quick recovery of the normal use function of the engineering structure, the city and even the whole society after the strong earthquake.
The steel structure has the advantages of high strength, good earthquake resistance, short construction period and the like, and is widely applied to various buildings. The beam column node is a key component in a steel structure, ensures the cooperative work of beams and columns, and enables the structure to form a whole, but the traditional steel structure beam column node has weak energy consumption capability and poor self-resetting capability, and can not be repaired and damaged easily in the earthquake.
The fabricated self-resetting steel frame structural system can effectively dissipate earthquake energy in an earthquake, control structural damage, has small residual deformation after the earthquake and is easy to repair, but brings self expansion effect of the fabricated self-resetting steel frame due to the characteristic of the node opening of the self-resetting steel frame during the earthquake, so that the traditional floor system is not suitable for the structural system.
Disclosure of Invention
In order to solve the technical problem, embodiments of the present application provide a displacement amplification staged energy consumption self-resetting beam column node, which not only can generate larger damper energy consumption displacement with the same structural deformation amount, but also can improve the structural energy consumption capability, further weaken the expansion effect of the frame, and simultaneously achieve staged energy consumption, self-resetting and easy recovery after an earthquake.
In order to achieve the above object, an embodiment of the present application provides a displacement amplification staged energy consumption self-resetting beam-column node, which includes a frame column, a cantilever short beam, a frame beam, an energy consumption damper assembly and an elastic resetting piece; the frame column, the cantilever short beam and the frame beam are all H-shaped steel; two ends of the cantilever short beam are respectively connected with the flange of the frame column and the first end of the frame beam; the energy dissipation damper assembly comprises two energy dissipation dampers symmetrically arranged relative to a web of the cantilever short beam; the energy consumption damper comprises a first fixed block, a second fixed block, a first energy consumption rod, a second energy consumption rod, a first slider and a second slider; the first fixing block and the second fixing block are fixedly connected to a web plate of the cantilever short beam; the second fixed block is arranged close to the flange of the cantilever short beam, and the first slider and the second slider are sequentially arranged on one side, away from the flange of the cantilever short beam, of the second fixed block; the first end of the first slider is connected with the first fixed block in a sliding mode through the first energy consumption rod; the second end of the first slider is connected with the frame beam; a first limiting structure is arranged between the first slider and the second fixed block and can prevent the first slider from moving towards the vertical direction; the first end of the second slider is connected with the first fixed block in a sliding mode through the second energy consumption rod; a second limiting structure is arranged between the first slider and the second slider, and the second limiting structure can prevent the first slider from moving towards the vertical direction; the frame beam is provided with an elastic resetting piece; the elastic resetting piece can provide upward resilience force for the second slider; when the first slider and the second slider move, the displacement in the vertical direction is multiple times of the displacement in the horizontal direction.
Further, the first limiting structure comprises a first limiting protrusion arranged at the first end of the first slider and a first limiting groove arranged at the lower end of the second fixed block; the first limiting groove is matched with the first limiting bulge; the second limiting structure comprises a second limiting protrusion arranged at the first end of the first slider and a second limiting groove arranged at the upper end of the second slider; the second limiting groove is matched with the second limiting bulge; the first limiting protrusion, the second limiting protrusion, the first limiting groove and the second limiting groove are curved surfaces, and the curved surfaces meet a planar relation that a relation delta y =2 delta x, wherein the delta x is a displacement in a horizontal direction, and the delta y is a displacement in a vertical direction.
Furthermore, the energy dissipation damper also comprises a first limiting block fixedly connected to a web plate of the cantilever short beam; the first limiting block and the second fixing block are located on the same vertical plane.
Furthermore, the elastic reset piece is a third compression spring, and two ends of the third compression spring are respectively connected with the lower surface of the second slider and the upper surface of the first limiting block.
Furthermore, the energy dissipation damper also comprises a second limiting block fixedly connected to a web plate of the cantilever short beam; when the second slider is located at the limit position far away from the first fixed block, the second slider is abutted to the second limiting block.
Further, the dissipative damper assembly further comprises a hinge shaft; the energy-consuming damper further comprises a connector; the first ends of the two connectors are respectively hinged to the second ends of the corresponding second sliders, and the second ends of the two connectors are hinged to the frame beam through hinge shafts.
Furthermore, the small end of the first energy consumption rod penetrates through the through hole in the first fixed block and then is in threaded connection with the first end of the first slider, and the small end of the first energy consumption rod can slide in the through hole in the first fixed block; and the small end of the second energy consumption rod penetrates through the through hole in the first fixed block and then is in threaded connection with the first end of the second slider, and the small end of the second energy consumption rod can slide in the through hole in the first fixed block.
Furthermore, a first compression spring is sleeved on the small end of the first energy consumption rod and is positioned between the large end of the first energy consumption rod and the first fixed block; and a second compression spring is sleeved on the small end of the second energy consumption rod and is positioned between the large end of the second energy consumption rod and the first fixing block.
Furthermore, the first end of the cantilever short beam is welded on the flange of the frame column, and the second end of the cantilever short beam is connected to the first end of the frame beam in a sliding mode through a connecting plate assembly.
Furthermore, the energy dissipation damper assemblies are two groups, and the two groups of energy dissipation dampers are symmetrically arranged relative to a center line of the cantilever short beam in the horizontal direction.
Compared with the prior art, the application has the following beneficial effects:
1. when the displacement amplification staged energy consumption self-resetting beam-column joint is normally used, the structure is in an elastic stage, and the energy consumption damper does not participate in working; when the small and medium earthquakes occur, the joint of the cantilever short beam and the frame beam rotates relatively, the second energy consumption rod connected with the second slider yields and consumes energy firstly, and the first energy consumption rod connected with the first slider still keeps elasticity; under the action of a large earthquake, the two sliders can yield together to consume energy, the vertical displacement of the second slider is multiple times of the horizontal displacement of the first slider, the same structural deformation can generate larger damper energy consumption displacement, and meanwhile, the damper has the functions of displacement amplification and staged energy consumption.
2. Third compression spring one side in this application embodiment links to each other with the second slider, and the opposite side links to each other with first stopper, and simultaneously, first compression spring and second compression spring's one end and power consumption stick are connected, and the other end is connected with the slider, makes the node have better from the reset ability after the shake.
3. The energy consumption rod can be recovered after the earthquake, and the easy recovery is realized.
4. The embodiment of the application has simple structure, is mostly connected by bolts, can realize assembly and can be widely applied to the technical field of damping and energy dissipation of building structures.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of an embodiment of the present disclosure;
FIG. 2 is a schematic perspective view of another embodiment of the present disclosure;
FIG. 3 is a schematic perspective view of an angle of the dissipative damper according to the embodiment of the present application;
FIG. 4 is a schematic perspective view of another angle of the dissipative damper according to the embodiment of the present application;
FIG. 5 is a schematic structural diagram of a joint between a cantilever short beam and a frame beam in an embodiment of the present application;
figure 6 is a schematic view of an energy consuming damper assembly according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1 and 2, an embodiment of the present application provides a displacement amplification staged energy dissipation self-resetting beam-column node, which includes a frame column 1, a cantilever short beam 2, a frame beam 3, an energy dissipation damper assembly 4 and an elastic resetting piece 5. Wherein, the frame column 1, the cantilever short beam 2 and the frame beam 3 are all H-shaped steel. The left end of the cantilever short beam 2 is welded on the right flange of the frame column 1, and the right end of the cantilever short beam 2 is connected with the left end of the frame beam 3 in a sliding mode through a connecting plate assembly 6. In order to enhance the stability of the frame column 1, two stiffening ribs 11 are welded between two flanges of the frame column 1, and the two stiffening ribs are respectively positioned on the same horizontal line with the upper flange and the lower flange of the cantilever short beam 2.
Specifically, referring to fig. 1, 2 and 5, the web assembly 6 includes a web connecting plate 61, two flange connecting plates 62 and a plurality of high-strength bolt pairs 63. Referring to fig. 5, the web middle of the cantilever stub beam 2 is provided with a first circular hole 21. The web middle of the frame beam 3 is provided with a second circular hole 31. Referring to fig. 2, the web connecting plate 61 is provided with a third circular hole 611 and a first elongated hole 612. And a fourth round hole (not shown) is arranged on the flange of the cantilever short beam 2. The flange of the frame beam 3 is provided with a fifth round hole (not shown). The flange connecting plate 62 is provided with a sixth round hole (not shown) and a second elongated hole (not shown). The web plate of the cantilever short beam 2 and the web plate of the frame beam 3 are connected with the web plate connecting plate 61 through a high-strength bolt pair 63 to resist shearing force. The flange of the cantilever short beam 2 and the flange of the frame beam 3 are connected with the flange connecting plate 62 through a high-strength bolt pair 63 to resist shearing force. Thereby, the frame beam 3 can be slid or turned at a small angle with respect to the cantilever stub beam 2.
In order to further improve the shear resistance, a beam end shear structure 7 is provided between the cantilever short beam 2 and the frame beam 3. Specifically, referring to fig. 5, the beam-end shear structure 7 includes a shear protrusion 71 disposed in the middle of the web of the boom short beam 2 and a shear recess 72 disposed in the middle of the web of the frame beam 3, the shear recess 72 is adapted to the shear protrusion 71, and after the boom short beam 2 and the frame beam 3 are connected, the shear protrusion 71 is located in the shear recess 72.
With continued reference to fig. 1, the dissipative damper assemblies 4 are provided in two sets, and the two sets of dissipative dampers 41 are arranged up and down symmetrically with respect to the center line of the cantilever stub beam 2. Therefore, displacement amplification, staged energy consumption and self-resetting can be realized no matter the frame beam 3 rotates clockwise or anticlockwise relative to the cantilever short beam 2.
Referring to fig. 6, each set of dissipative damper assemblies 4 comprises two dissipative dampers 41 arranged symmetrically with respect to the web of the cantilever stub beam 2. Hereinafter, the dissipative damper 41 is explained as an example, which is toward the paper surface and is close to the upper flange of the cantilever stub 2.
Referring to fig. 2, 3 and 4, the dissipative damper 41 includes a first fixing block 411, a second fixing block 412, a first dissipative rod 413, a second dissipative rod 414, a first slider 415, a second slider 416, a first stopper 417, a second stopper 418, and a connector 419.
Referring to fig. 1 and 3, the first fixing block 411 and the second fixing block 412 are both fixedly connected to a web of the cantilever short beam 2, and the second fixing block 412 is disposed near a flange of the cantilever short beam 2. A first slider 415, a second slider 416 and a first stopper 417 are sequentially disposed below the second fixed block 412. The first stopper 417 is welded to the web of the cantilever beam 2 and is located on the same vertical plane as the second fixing block 412. It should be noted that the first limiting blocks 417 in the two sets of dissipative dampers 41 disposed vertically symmetrically may be shared.
Referring to fig. 3, the first slider 415 has a left end slidably coupled to the first fixing block 411 by a first energy consumption bar 413, and a right end hinged to a left end of the connector 419. Referring to fig. 6, the right end of the connector 419 is connected to the frame beam 3 through the hinge shaft 42. Specifically, the small end of the first energy consumption rod 413 passes through the through hole of the first fixed block 411 and then is in threaded connection with the first end of the first slider 415, the small end of the first energy consumption rod 413 can slide in the through hole of the first fixed block 411, the small end of the second energy consumption rod 414 passes through the through hole of the first fixed block 411 and then is in threaded connection with the first end of the second slider 416, and the small end of the second energy consumption rod 414 can slide in the through hole of the first fixed block 411. Referring to fig. 1, 5 and 6, the frame beam 3 is provided with a coupling hole 32, and the hinge shaft 42 passes through the coupling hole 32 and both ends thereof are respectively hinge-coupled with corresponding connectors 419. In the embodiment of the present invention, the number of the first energy consumption rods 413 is three, and the number of the second energy consumption rods 414 is two. It should be noted that the number of the first energy consumption rod 413 and the second energy consumption rod 414 may be one or multiple, and the specific number is selected according to actual needs, and is not limited herein.
Referring to fig. 1 and 4, a first limit structure is disposed between the first slider 415 and the second fixed block 412, and the first limit structure can prevent the first slider 415 from moving in a vertical direction. Specifically, the first limit structure includes a first limit protrusion 4151 disposed at an upper portion of a left end of the first slider 415 and a first limit groove 4121 disposed at a lower end of the second fixed block 412, and the first limit groove 4121 is adapted to the first limit protrusion 4151. When the beam-column node is in a normal state, the first stopper protrusion 4151 is completely located within the first stopper groove 4121.
Referring to fig. 1, a second stopper 418 is welded to the web of the cantilever beam 2, the left end of the second slider 416 is slidably connected to the first fixing block 411 through a second energy consumption rod 414, and the second stopper 418 can prevent the second slider 416 from moving horizontally.
A second limiting structure is arranged between the first slider 415 and the second slider 416. The second stopper structure can prevent the first slider 415 from moving rightward. Specifically, the second stopper structure includes a second stopper protrusion 4152 provided at a lower portion of the left end of the first slider 415 and a second stopper groove 4161 provided at an upper end of the second slider 416. The second restricting groove 4161 is fitted with the second restricting protrusion 4152. When the beam-column node is in the normal state, the second restricting projection 4152 is completely located within the second restricting groove 4161.
The first restricting protrusion 4151, the second restricting protrusion 4152, the first restricting groove 4121 and the second restricting groove 4161 may be curved surfaces or flat surfaces. For ease of understanding, all the curved surfaces described above may satisfy a planar relationship of the relationship Δ y =2 Δ x, where Δ x is a displacement amount in the horizontal direction and Δ y is a displacement amount in the vertical direction. That is, 2 Δ is generated when the first slider 415 generates x The second slider 416 will generate a 4 Δ during the vertical displacement of (a) x The vertical displacement of the energy-saving device can realize staged energy consumption. Therefore, the embodiment of the application can convert the transmitted horizontal displacement into the vertical displacement and amplify the original displacement, so that the sensitivity of the damper to the structural deformation is improved, and the energy consumption capacity of the structure is improved. In addition, in order to make the energy dissipater dissipate energy more effectively, the contact surfaces of the first slider 415, the second slider 416 and the first fixing block 411 may be designed to be different curved surfaces, and the geometric shape of the contact surfaces is adjusted to satisfy the requirement of dissipating energy for amplification of displacement.
The frame beam 3 is provided with an elastic reset member 5, the elastic reset member 5 in the embodiment of the present application may be a third compression spring, and two ends of the third compression spring are respectively connected to the lower surface of the second slider 416 and the upper surface of the first limiting block 417. Thus, when self-reset is required, the elastic reset piece 5 can provide an upward resilient force to the second slider 416. The resilience provided by the elastic resetting piece 5 is the main resilience.
The small end of the first energy consuming rod 413 is sleeved with a first compression spring 4110, the first compression spring 4110 is located between the large end of the first energy consuming rod 413 and the first fixed block 411, the small end of the second energy consuming rod 414 is sleeved with a second compression spring 4111, and the second compression spring 4111 is located between the large end of the second energy consuming rod 414 and the first fixed block 411. Thus, the first compression spring 4110 and the second compression spring 4111 can provide resilience force in the axial direction for the first energy consuming bar 413 and the second energy consuming bar 414, and the resilience force provided by the first compression spring 4110 and the second compression spring 4111 is an auxiliary resilience force.
The first energy consumption rod 413 and the second energy consumption rod 414 are both made of steel with the yield strength ranging from 100MPa to 225 MPa. The web connecting plate 61 and the flange connecting plate 62 are made of steel with yield strength not lower than 345 MPa. The first compression spring, the second compression spring and the third compression spring are all made of 60Si2MnA and 50CrVA spring steel with yield strength not lower than 1600 MPa.
The beam-column joint connection structure is convenient to connect and easy to construct, has excellent energy consumption self-resetting capability and restorable easy-to-restore capability, and also has displacement amplification and staged energy consumption functions.
The working principle of the self-resetting beam-column joint with staged energy consumption during displacement amplification of the embodiment of the application is as follows:
referring to fig. 1, the node structure of the embodiment of the present application is symmetrical, so that the working principle of the beam end node is consistent whether clockwise rotation or counterclockwise rotation occurs. The description will be given by taking an example in which the frame beam 3 rotates clockwise with respect to the cantilever beam 2 with the lower flange edge as the center of rotation.
During normal use, the node in the embodiment of the present application is in an elastic stage, the joint between the cantilever short beam 2 and the frame beam 3 bears shear force and bending moment, and the energy dissipation damper 41 does not participate in work.
When a small shock or a medium shock occurs, the frame beam 3 drives the first slider 415 to move downwards to the right, and simultaneously the second slider 416 moves downwards, and because the relative rotation angle of the cantilever short beam 2 is small, the second energy consumption rod 414 connected with the second slider 416 generates plastic deformation yielding energy firstly, and the first energy consumption rod 413 connected with the first slider 415 still keeps elasticity. After earthquake, the elastic reset piece 5, the first compression spring 4110 and the second compression spring 4111 provide restoring force, so that self-reset is realized.
When a large shock occurs, the frame beam 3 drives the first slider 415 to move downward to the right, and simultaneously the second slider 416 moves downward, and because the relative rotation angle of the cantilever short beam 2 is large, the second energy consumption rod 414 connected with the second slider 416 still generates plastic deformation yielding energy firstly, and the first energy consumption rod 413 connected with the first slider 415 also generates plastic deformation yielding energy successively. After earthquake, the elastic reset piece 5, the first compression spring 4110 and the second compression spring 4111 provide restoring force, so that self-reset is realized.
Because the first energy consumption rod 413 and the second energy consumption rod 414 are connected with the first slider 415 and the second slider 416 through threads, if the energy consumption rods are damaged after an earthquake, the energy consumption rods can be directly screwed off, and the energy consumption rods are easy to replace.
The above is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A displacement amplification staged energy consumption self-reset beam column node is characterized by comprising a frame column, a cantilever short beam, a frame beam, an energy consumption damper assembly and an elastic reset piece; the frame column, the cantilever short beam and the frame beam are all H-shaped steel;
two ends of the cantilever short beam are respectively connected with the flange of the frame column and the first end of the frame beam;
the energy dissipation damper assembly comprises two energy dissipation dampers symmetrically arranged relative to a web of the cantilever short beam;
the energy consumption damper comprises a first fixed block, a second fixed block, a first energy consumption rod, a second energy consumption rod, a first slider and a second slider; the first fixing block and the second fixing block are fixedly connected to a web plate of the cantilever short beam; the second fixing block is arranged close to the flange of the cantilever short beam, and the first slider and the second slider are sequentially arranged on one side, away from the flange of the cantilever short beam, of the second fixing block;
the first end of the first slider is connected with the first fixed block in a sliding mode through the first energy consumption rod; the second end of the first slider is connected with the frame beam; a first limiting structure is arranged between the first slider and the second fixed block and can prevent the first slider from moving towards the vertical direction;
the first end of the second slider is connected with the first fixed block in a sliding mode through the second energy consumption rod; a second limiting structure is arranged between the first slider and the second slider, and the second limiting structure can prevent the first slider from moving towards the vertical direction;
the frame beam is provided with an elastic resetting piece; the elastic resetting piece can provide upward resilience force for the second slider;
when the first slider and the second slider move, the displacement in the vertical direction is multiple times of the displacement in the horizontal direction.
2. The displacement amplification stage staged energy consumption self-resetting beam-column node as claimed in claim 1,
the first limiting structure comprises a first limiting protrusion arranged at the first end of the first slider and a first limiting groove arranged at the lower end of the second fixed block; the first limiting groove is matched with the first limiting bulge;
the second limiting structure comprises a second limiting protrusion arranged at the first end of the first slider and a second limiting groove arranged at the upper end of the second slider; the second limiting groove is matched with the second limiting bulge;
the first limiting protrusion, the second limiting protrusion, the first limiting groove and the second limiting groove are curved surfaces, and the curved surfaces meet the relation delta y ＝2△ x In which Δ x Is the amount of displacement in the horizontal direction, Δ y Is the amount of displacement in the vertical direction.
3. The displacement amplifying staged energy dissipating self-resetting beam-column node of claim 2, wherein the energy dissipating damper further comprises a first stopper attached to the web of the cantilever beam; the first limiting block and the second fixing block are located on the same vertical plane.
4. The displacement amplification stage energy dissipation self-resetting beam-column node as claimed in claim 3, wherein the elastic resetting piece is a third compression spring, and two ends of the third compression spring are respectively connected with the lower surface of the second slider and the upper surface of the first limiting block.
5. The displacement amplifying staged energy dissipation self-resetting beam-column node as claimed in claim 1, wherein the energy dissipation damper further comprises a second limiting block attached to the web of the cantilever beam; when the second slider is located at the limit position far away from the first fixed block, the second slider is abutted to the second limiting block.
6. A displacement amplifying staged power dissipating self-resetting beam and column node as claimed in claim 1, wherein the power dissipating damper assembly further comprises a hinged shaft; the energy-consuming damper further comprises a connector; the first ends of the two connectors are respectively hinged to the second ends of the corresponding second sliders, and the second ends of the two connectors are hinged to the frame beam through hinge shafts.
7. The displacement amplification stage energy dissipation self-resetting beam-column joint as claimed in claim 1, wherein the small end of the first energy dissipation rod is threaded with the first end of the first slider after passing through the through hole on the first fixed block, and the small end of the first energy dissipation rod can slide in the through hole on the first fixed block; and the small end of the second energy consumption rod penetrates through the through hole in the first fixed block and then is in threaded connection with the first end of the second slider, and the small end of the second energy consumption rod can slide in the through hole in the first fixed block.
8. The displacement amplification stage energy dissipation self-resetting beam-column joint as claimed in claim 2, wherein a first compression spring is sleeved on the small end of the first energy dissipation rod, and the first compression spring is located between the large end of the first energy dissipation rod and the first fixing block; and a second compression spring is sleeved on the small end of the second energy consumption rod and is positioned between the large end of the second energy consumption rod and the first fixing block.
9. The displacement amplifying staged energy dissipating self-resetting beam-column node of claim 2, wherein the first end of the cantilever beam is welded to the flange of the frame column, and the second end of the cantilever beam is slidably connected to the first end of the frame beam by a connecting plate assembly.
10. The displacement amplifying staged energy dissipation self-resetting beam-column joint as claimed in claim 2, wherein the energy dissipation damper assemblies are two groups, and the two groups of energy dissipation dampers are symmetrically arranged relative to the horizontal center line of the cantilever short beam.
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| CN202210722161.6A CN114922496B (en) | 2022-06-24 | 2022-06-24 | Displacement amplification staged energy consumption self-resetting beam-column joint |
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| CN202210722161.6A CN114922496B (en) | 2022-06-24 | 2022-06-24 | Displacement amplification staged energy consumption self-resetting beam-column joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104131616B (en) * | 2014-07-16 | 2016-05-04 | 长沙理工大学 | Self-resetting precast and assembled reinforced concrete framework |
| CN104314197B (en) * | 2014-11-03 | 2016-09-28 | 河南城建学院 | The double rod viscous damping wall of a kind of displacement equations type |
| CN107268825A (en) * | 2017-08-23 | 2017-10-20 | 陈云 | Self-resetting beam column friction energy-dissipating node |
| CN108412074A (en) * | 2018-05-31 | 2018-08-17 | 福州大学 | Displacement equations type is classified anti-seismic damper and its application method |
| CN108978917B (en) * | 2018-06-26 | 2020-06-26 | 江苏千禧杭萧装配式建筑科技有限公司 | Assembled metal friction energy dissipater |
| CN110056235B (en) * | 2019-03-19 | 2021-08-10 | 上海大学 | Displacement amplification corrugated web damper |
| CN110499833B (en) * | 2019-08-20 | 2020-09-22 | 燕山大学 | Staged energy consumption damper |
| CN211665986U (en) * | 2019-09-16 | 2020-10-13 | 重庆大学 | Multi-stage energy-consuming post-tensioning self-resetting node |
| CN111962703A (en) * | 2020-08-18 | 2020-11-20 | 广州大学 | Self-resetting buckling-restrained brace and energy dissipation method thereof |
| CN113445799A (en) * | 2021-06-17 | 2021-09-28 | 北京建筑大学 | Core column type double-flange self-resetting beam column connecting node structure |
| CN113530332A (en) * | 2021-07-19 | 2021-10-22 | 北京市建筑设计研究院有限公司 | Super high-rise energy dissipation cantilever damping system with amplification technology |
| CN216664470U (en) * | 2021-09-27 | 2022-06-03 | 燕山大学 | Self-resetting steel frame beam column joint of crawler steel energy dissipation damper |
| CN114607043B (en) * | 2022-01-05 | 2022-12-13 | 燕山大学 | Assembly type self-resetting friction energy-consuming steel frame beam-column joint with rotating center at web |
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