CN113323178B - Compound low yield point metal damper with multidimension power consumption function - Google Patents
Compound low yield point metal damper with multidimension power consumption function Download PDFInfo
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- CN113323178B CN113323178B CN202110557911.4A CN202110557911A CN113323178B CN 113323178 B CN113323178 B CN 113323178B CN 202110557911 A CN202110557911 A CN 202110557911A CN 113323178 B CN113323178 B CN 113323178B
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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
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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
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a composite low-yield-point metal damper with a multi-dimensional energy consumption function, which is arranged in an interlayer support and aims to play the roles of energy consumption and shock absorption in any direction in a plane and simultaneously have the functions of vibration damping and resetting in the vertical direction and the torsion direction. The steel tube shear energy-consumption damper consists of a bending energy-consumption damper, a shearing energy-consumption damper, an inner steel tube, an outer steel ring and a steel plate, and is characterized in that: the inner steel cylinder, the outer steel cylinder and the outer steel ring are coaxial, the bending energy dissipation damper and the shearing energy dissipation damper are horizontally and symmetrically arranged along the circumference of the steel cylinder in the radial direction, two ends of the bending energy dissipation damper and two ends of the shearing energy dissipation damper are fixed on the inner steel cylinder and the outer steel cylinder respectively, one side of the outer steel cylinder is welded, and one side of the inner steel cylinder is welded. The outer steel cylinder and the outer steel ring are coaxial, the steel plates are horizontally and symmetrically arranged along the radial direction of the circumference and are fixed in a welding mode, and two ends of the steel plates are respectively fixed on the outer steel cylinder and the outer steel ring. The invention can deform, consume energy and absorb shock in any direction, vertical direction and torsion direction in a plane, and has low yield strength and high energy consumption efficiency.
Description
Technical Field
The invention relates to a composite low-yield-point metal damper with a multi-dimensional energy consumption function, which can deform, consume energy and absorb shock in any direction, vertical direction and torsion direction in a plane, and has low yield strength and high energy consumption efficiency. The invention belongs to the technical field of civil engineering disaster prevention and reduction.
Background
Earthquake fortification needs to be considered in most areas of China, and the improvement of the earthquake-resistant and shock-absorbing technical level of the building structure has important significance. The damper is an excellent energy-consumption shock absorption device, but the existing damper can only participate in one type of shock absorption and energy consumption, and cannot well realize sufficient shock absorption and energy consumption of a structure under complex multidimensional seismic oscillation. Therefore, the invention provides a composite type low-yield-point metal damper with a multi-dimensional energy consumption function. The mechanical principle of the device is as follows: the advantages of the bending energy-consumption damper and the advantages of the shearing energy-consumption damper are combined, the outer steel cylinder and the outer steel ring are connected through the steel plate, the advantages of the bending damper and the advantages of the shearing damper are complemented, and the multidimensional low-yield-point steel damper capable of fully consuming energy in multiple directions is formed. For the bending energy-consuming damper, different hollow forms are arranged according to different requirements, so that sufficient bending deformation energy consumption can be realized, the whole section can be yielded at the same time, and the energy-consuming capability is greatly improved, thereby achieving a good shock absorption effect. For the shear energy consumption damper, a plurality of steels with different yield strengths are combined into a low-yield-point damper which can resist shear deformation. For example, the partial damper may be composed of low yield point steel (LY 160) and normal steel (Q345) in various combinations of thickness and proportions. In an earthquake, the low-yield material enters the deformation stage at first and reaches the yield stage, and the nodes fully consume energy and absorb shock. The damper between the inner steel cylinder and the outer steel cylinder and the steel plate between the outer steel cylinder and the outer steel ring can well play a role in torsion resistance and a reset function, and the damping and energy consumption are carried out, so that the stability of the structure is guaranteed.
Disclosure of Invention
In order to improve the damage condition of a structure in an earthquake, the invention provides a composite type low-yield-point metal damper with a multi-dimensional energy dissipation function.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite low-yield-point metal damper with a multi-dimensional energy consumption function mainly comprises: crooked power consumption attenuator (1), shearing power consumption attenuator (2), interior steel cylinder (3), outer steel cylinder (4), outer steel ring (5), steel sheet (6) are constituteed, characterized by: the inner steel cylinder (3), the outer steel cylinder (4) and the outer steel ring (5) are coaxial, and the bending energy-consumption damper (1) and the shearing energy-consumption damper (2) are radially, horizontally and symmetrically arranged along the circumference of the steel cylinder and are fixed with the inner steel cylinder (3) and the outer steel cylinder (4) in a welding mode. The outer steel cylinder (4) and the outer steel ring (5) are coaxial, the steel plates (6) are horizontally and symmetrically arranged along the radial direction of the circumference and are fixed in a welding mode, and the two ends of the steel plates are respectively fixed on the outer steel cylinder (4) and the outer steel ring (5). The inner steel cylinder (3) is fixedly connected with the outer support and then connected with a structure to be controlled.
The bending energy-consuming damper (1) can realize bending deformation energy consumption, and different hollow forms are arranged according to different requirements, so that an ideal damping effect is achieved. Under the action of an earthquake, the whole section of the bending energy-consuming damper (1) can yield at the same time, and is convenient to replace after the earthquake, so that the restoring is facilitated and the aftershock resistance is realized.
The shearing energy consumption damper (2) can realize shearing deformation energy consumption. The shearing energy dissipation damper (2) mainly comprises a partially hollow energy dissipation metal plate between an inner steel cylinder and an outer steel cylinder. The energy dissipation metal plates can be combined by steel plates with different thicknesses and yield strengths in different proportions, are arranged in a staggered mode and are fixedly connected with one another, and then are connected through high-strength bolts.
The outer steel cylinder (4) and the outer steel ring (5) are connected by a steel plate (6), so that the energy consumption of the torsional deformation can be better performed. When the structure is subjected to the force of up-and-down motion, the inner steel cylinder (3) and the outer steel cylinder (4) can move relatively, and the bending energy-consuming damper (1) and the shearing energy-consuming damper (2) can fully consume energy for up-and-down deformation, so that the safety of the main structure is ensured.
And part of steel plates in the bending energy-consumption damper (1) and the shearing energy-consumption damper (2) can adopt low-yield-point steel, and the yield stress of the low-yield-point steel is not more than 200MPa. The thickness of the energy dissipation metal plate in the bending energy dissipation damper (1) and the shearing energy dissipation damper (2) can be different, and the thickness range of the plate with the minimum thickness is 1-10 mm; the thickness of the plate with the largest thickness cannot exceed 50mm. The distances between the energy dissipation metal plates in the bending energy dissipation damper (1) and the shearing energy dissipation damper (2) can be different, the range of the minimum distance is 1 time of the minimum plate thickness to 2 times of the minimum plate thickness, and the range of the maximum distance is 2 times of the maximum plate thickness to 3 times of the maximum plate thickness.
The number of the energy dissipation metal plates in any shear energy dissipation damper connected with the inner steel cylinder (3) cannot be less than 3; the number of the energy dissipation metal plates in any bending energy dissipation damper connected with the inner steel cylinder (3) cannot be less than 3; the thicknesses of the inner steel cylinder (3), the outer steel cylinder (4) and the outer steel ring (5) are more than 3 times of the thickness of the thickest energy dissipation metal plate in the bending energy dissipation damper and the shearing energy dissipation damper.
The functions of the invention are as follows:
bending energy dissipation dampers and shearing energy dissipation dampers are uniformly arranged between the inner steel cylinder and the outer steel cylinder, and energy dissipation can be carried out on vibration in any direction in a plane during earthquake. The inner steel cylinder and the outer steel cylinder have vertical and torsional vibration damping and resetting functions. The outer steel cylinder and the outer steel ring are connected by the steel plate, so that the vibration damping in the torsion direction can be improved, and the damper has a better reset function.
The structure is subjected to bending action, and when the bending energy-consuming damper reaches the yield stage, energy-consuming shock absorption is realized. The structure is subjected to a shearing action, the low-yield material in the shearing energy-consuming damper enters the deformation stage at first and reaches the yield stage, and the node performs sufficient energy-consuming shock absorption. The structure receives the twisting action, can produce relative rotation between interior steel section of thick bamboo and the outer steel section of thick bamboo, can consume energy to the twisting action, and the relative rotation of outer steel ring to the outer steel section of thick bamboo simultaneously also can consume energy to the twisting action.
Compared with the prior art, the invention has the following advantages:
1) The shape of the bending energy-consumption damper is optimized by the shape of the traditional metal damper based on the full-stress design theory, the optimized damper can achieve the yield of the whole section under the stress action, and the performance is excellent.
2) The energy consumption metal plate of the shearing energy consumption damper is formed by combining low yield point steel with different thicknesses and steel plates of common steel in different proportions, so that the equivalent yield strength is lower and adjustable.
3) The design of the full stress of the bending energy-consuming metal damper is that the triangular damper is an ideal model which can reach the full stress, the contact surface at the top of the triangular damper is too small to be reliably connected with a building structure in application, and a top node can be broken and damaged when the triangular damper participates in energy consumption. The bending energy-consumption metal damper is optimized in shape, the damper can be made into a vertically symmetrical mode, and the upper end and the lower end of the damper are connected with the structure in a fixed mode. When the damper is bent, the reverse bending point is in the middle of the damper, and the stress form of the damper is equivalent to that of four independent triangular plates.
4) The full stress design of the shearing energy consumption damper has the advantages that the stress distribution of the internal optimized damper is uniform, but the stress level is relatively low. The edge optimized damper is uniform in stress and high in stress level, and best meets the full stress design criterion.
Drawings
FIG. 1 is a top view of the apparatus of the present invention
FIG. 2 is a cross-sectional view of the device of the present invention
FIG. 3 is a cross-sectional view of the device of the present invention
FIG. 4 is a perspective view of the device of the present invention
FIG. 5 is a structural view of a bending energy-consuming damper of the present invention
FIG. 6 is a drawing of the soft steel energy dissipation damper mechanism of the device of the present invention
FIG. 7 is a schematic view of an embodiment of the apparatus of the present invention
In the figure: 1-bending energy dissipation damper, 2-shearing energy dissipation damper, 3-inner steel cylinder, 4-outer steel cylinder, 5-outer steel ring and 6-steel plate.
Detailed Description
Example 1:
the following detailed description of the embodiments of the invention refers to the accompanying drawings.
The composite low-yield-point metal damper with the multidimensional energy dissipation function can play the functions of energy dissipation and shock absorption in any direction in a plane, and has the functions of vibration damping in the vertical direction and the torsion direction and resetting. The steel tube shear comprises a bending energy dissipation damper (1), a shearing energy dissipation damper (2), an inner steel tube (3), an outer steel tube (4), an outer steel ring (5) and a steel plate (6).
The implementation steps are as follows:
1) In this example, the applied building is a steel-concrete frame structure, which has 5 layers in total and 4.2m layer height. For the part of the frame for installing the damper, the upper end of the damper is fixedly connected with a beam-column joint, the lower end of the damper is fixedly connected with a column base, and the connection mode is bolt connection. The column distance is 6.0m, the whole length of the supporting device connected with the damper is 9.9m, the cross section of the inclined strut is an I-shaped cross section, and the specification is 630 multiplied by 180 multiplied by 17mm.
The design parameters of the composite low-yield-point metal damper with the multidimensional energy consumption function are as follows: the thickness of outer steel cylinder and interior steel cylinder is 40mm, the thickness of outer steel ring is 35mm, the internal diameter 120mm of interior steel cylinder, the external diameter is 200mm, the internal diameter of outer steel cylinder is 520mm, the external diameter is 600mm, the sectional length of crooked energy dissipation attenuator is 160mm at the longest point, energy consumption metal sheet plate thickness is 6mm and 8mm respectively, single crooked energy dissipation attenuator sets up 4 energy consumption metal sheets, two energy consumption metal sheet thickness in edge are 8mm, two energy consumption metal sheet thickness in the middle of the centre are 6mm. The longest section length of the shearing energy-consumption damper is 160mm, the thicknesses of energy-consumption metal plates are 6mm and 8mm respectively, 9 energy-consumption metal plates are arranged on a single shearing energy-consumption damper, and the energy-consumption metal plates with different plate thicknesses are alternately placed. The height of the section of the steel plate is 60mm, and the overall height of the damper is 1.2m. The yield strength of the energy dissipating metal plate 6mm thick was LY160, and the yield strength of the energy dissipating metal plate 8mm thick was Q345. The number of the bending energy-consuming dampers is 6, the distance between every two adjacent bending energy-consuming dampers is 168mm, the distance between the edge energy-consuming metal plate and the adjacent energy-consuming metal plate in a single bending energy-consuming damper is 8mm, and the distance between the two adjacent energy-consuming metal plates in the middle is 16mm.
And selecting components with corresponding sizes according to requirements, and welding the inner steel cylinder and the outer steel cylinder by using a bending energy-consumption damper and a shearing energy-consumption damper.
During welding, the height of the shearing energy dissipation damper is the same as that of the inner steel cylinder and the outer steel cylinder, the thicknesses of the energy dissipation metal plates are 6mm and 8mm respectively, 9 energy dissipation metal plates are arranged on a single shearing energy dissipation damper, the energy dissipation metal plates with different plate thicknesses are alternately placed, and the plate thicknesses of the edge energy dissipation metal plates are 8mm. The number of the bending energy-consuming dampers is 6, the distance between every two adjacent bending energy-consuming dampers is 168mm, the distance between the edge energy-consuming metal plate and the adjacent energy-consuming metal plate in a single bending energy-consuming damper is 8mm, and the distance between the two adjacent energy-consuming metal plates in the middle is 16mm.
The outer steel ring and the outer steel cylinder are connected through the steel plate, and the steel plate is guaranteed to be evenly distributed during welding.
Through finite element simulation, the displacement damping rates of the structure under 0.4g earthquake in two horizontal directions are respectively 19.8% and 14.6%, and the torsion angle damping rate is 8.2%.
The above is an exemplary embodiment of the present invention, but the implementation of the present invention is not limited thereto.
Claims (1)
1. A composite low-yield-point metal damper with a multi-dimensional energy consumption function is characterized in that: the inner steel cylinder (3), the outer steel cylinder (4) and the outer steel ring (5) are coaxial, the bending energy-consumption damper (1) and the shearing energy-consumption damper (2) are horizontally and symmetrically arranged along the radial direction of the circumference of the steel cylinder, the bending energy-consumption damper (1) and the shearing energy-consumption damper (2) are welded on the inner side of the outer steel cylinder (4), and the bending energy-consumption damper (1) and the shearing energy-consumption damper (2) are welded on the outer side of the inner steel cylinder (3); the outer steel cylinder (4) and the outer steel ring (5) are coaxial; the steel plates (6) are horizontally and symmetrically arranged along the circumferential radial direction and are fixed in a welding mode; two ends of the steel plate (6) are respectively fixed on the outer steel cylinder (4) and the outer steel ring (5); the inner steel cylinder (3) is fixedly connected with an external support and then connected with a structure to be controlled; the bending energy-consuming damper (1) realizes bending deformation energy consumption, and different hollow energy-consuming metal plates are arranged according to different requirements;
the shearing energy consumption damper (2) can realize shearing deformation energy consumption; the shearing energy-consuming damper (2) comprises a partially hollowed energy-consuming metal plate between an inner steel cylinder and an outer steel cylinder; the energy-consuming metal plate of the shearing energy-consuming damper is formed by combining low-yield-point steel with different thicknesses and steel plates of common steel in different proportions;
the longest section length of the bending energy-consumption damper (1) is 160mm, the thicknesses of energy-consumption metal plates are 6mm and 8mm respectively, 4 energy-consumption metal plates are arranged on a single bending energy-consumption damper, the thicknesses of two energy-consumption metal plates at the edge are 8mm, and the thicknesses of two energy-consumption metal plates in the middle are 6mm; the longest section length of the shearing energy-consuming damper (2) is 160mm, the thicknesses of energy-consuming metal plates are 6mm and 8mm respectively, and 9 energy-consuming metal plates are arranged in a single shearing energy-consuming damper;
the thicknesses of the energy dissipation metal plates in the bending energy dissipation damper (1) and the shearing energy dissipation damper (2) are different, and the thickness range of the plate with the minimum thickness is 1mm to 10mm; the thickness of the plate with the greatest thickness cannot exceed 50mm;
the distances between the energy dissipation metal plates in the bending energy dissipation damper (1) and the shearing energy dissipation damper (2) are different, the minimum distance ranges from 1 time of the minimum plate thickness to 2 times of the minimum plate thickness, and the maximum distance ranges from 2 times of the maximum plate thickness to 3 times of the maximum plate thickness;
the thickness of the inner steel cylinder (3), the outer steel cylinder (4) and the outer steel ring (5) is more than 3 times of the thickness of the thickest energy dissipation metal plate in the bending energy dissipation damper and the shearing energy dissipation damper.
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| CN115538634B (en) * | 2022-10-03 | 2023-11-24 | 北京工业大学 | Universal graded yielding combined damping device with torsion-resistant and anti-overturning functions |
| CN117536088B (en) * | 2024-01-09 | 2024-04-02 | 中裕铁信交通科技股份有限公司 | Heterogeneous metal damping rod and manufacturing method thereof |
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