CN111691566A - Dual energy consumption type damper - Google Patents

Dual energy consumption type damper Download PDF

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Publication number
CN111691566A
CN111691566A CN202010663856.2A CN202010663856A CN111691566A CN 111691566 A CN111691566 A CN 111691566A CN 202010663856 A CN202010663856 A CN 202010663856A CN 111691566 A CN111691566 A CN 111691566A
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CN
China
Prior art keywords
yield point
shaped
low yield
steel sheet
dual
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CN202010663856.2A
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Chinese (zh)
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史庆轩
马立成
王斌
孟非凡
张甜
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN202010663856.2A priority Critical patent/CN111691566A/en
Publication of CN111691566A publication Critical patent/CN111691566A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, 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
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

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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)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The utility model provides a dual power consumption type attenuator, including the low yield point steel sheet of U-shaped, the low yield point steel sheet of U-shaped divide into two, form annular structure through butt weld, the U-shaped department of the low yield point steel sheet of U-shaped is hollow out construction, the bolt hole that resists plucking and not shearing has been seted up to the first side of the low yield point steel sheet of U-shaped, ordinary bolt hole has been seted up to the second side of the low yield point steel sheet of U-shaped, be provided with viscoelastic damping material between first side of the low yield point steel sheet of U-shaped and the second side, viscoelastic damping material one terminal surface links to each other with the first side of the low yield point steel sheet of U-shaped through the upper cover plate, viscoelastic damping material other terminal. The invention improves the earthquake-resistant performance of the structure and has the characteristics of reliable performance and simple structure.

Description

Dual energy consumption type damper
Technical Field
The invention relates to the technical field of special structures and energy dissipation and shock absorption structures, in particular to a dual energy dissipation type damper.
Background
The traditional earthquake-resistant structure resists the earthquake action by enhancing the earthquake-resistant performance of the structure. Under the action of strong shock, major stressed components can be greatly damaged, so that the major stressed components are difficult to repair after the shock, certain economic loss is caused, and even casualties are caused. Therefore, the performance target of 'falling from great earthquakes' can not meet the requirements of modern society, and a new technology is urgently needed to improve the anti-seismic toughness of the structure.
The metal damper utilizes plastic deformation of metal to realize energy consumption. During an earthquake, the metal damper must enter plastic prior to structural members such as beams and columns, and must enter a plastic state at the stress level desired by design.
The metal damper is one of the most widely applied energy dissipation and shock absorption devices due to the simple mechanical model, obvious energy dissipation effect, and better durability and economy. However, metal dampers require relative displacement to yield to dissipate energy. Therefore, the metal damper is difficult to act under the actions of small vibration, medium vibration and large vibration, and when the metal damper is in the wind vibration circulation action for a long time, the metal material is easy to generate fatigue effect, and the service life is limited. In addition, the metal damper has obvious influence on the lateral stiffness of the structure before and after yielding, and is inconvenient to design.
The viscoelastic damper is an effective passive damping control device, and provides additional rigidity and damping for a structure mainly by means of hysteresis energy dissipation characteristics of viscoelastic materials, so that dynamic response of the structure is reduced, and the aim of damping is fulfilled.
The viscoelastic damper has reliable performance, simple structure and convenient manufacture, and can provide rigidity and larger damping for the structure; the force and displacement hysteresis curve of the damper is approximate to an ellipse, the energy consumption capability is strong, and the wind vibration and earthquake reaction of a building can be effectively reduced; has wide engineering applicability. Compared with the displacement type damper, the viscoelastic damper can dissipate energy under all vibration conditions, and can dissipate energy even under a small vibration condition. The viscoelastic damper can be simultaneously applied to earthquake and wind vibration control of the structure, and the problem that how the initial rigidity of the energy dissipater is matched with the lateral movement rigidity of the structure in other dampers is solved.
Research shows that the energy consumption capacity of the viscoelastic damper increases along with the increase of frequency, and under high frequency, the energy consumption capacity gradually returns to a certain balance value along with the increase of cycle times; when the strain amplitude is less than 50%, the influence of the strain is small, but under the excitation of large strain, the energy consumption capacity gradually returns to a certain balance value along with the increase of the cycle number. It has been found that the viscoelastic damper is not pulled out when the strain amplitude reaches 300%, but when the strain amplitude reaches 150%, the hysteresis curve has changed into reverse S-shape, the viscous performance is reduced, the strain hardening is enhanced, and the rigidity is increased. Obviously, under the action of 'heavy shock', the material utilization rate of the viscoelastic damper is not high.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a dual energy consumption type damper, which solves the problem of insufficient energy consumption capability of a viscoelastic damper under a large strain amplitude value in a mode of combining a displacement type damper and a velocity type damper, can also avoid the fatigue effect of a metal damper under the action of wind vibration, realizes the energy consumption of the damper in the whole process, improves the anti-seismic performance of the structure, and has the characteristics of reliable performance and simple structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a dual power consumption type attenuator, includes U-shaped low yield point steel sheet 1, U-shaped low yield point steel sheet 1 be two, end to end forms ring structure, U-shaped department of U-shaped low yield point steel sheet 1 be hollow out construction, U-shaped low yield point steel sheet 1 first side seted up resistance to plucking bolt hole 2 that does not shear, U-shaped low yield point steel sheet 1 second side seted up ordinary bolt hole 3, U-shaped low yield point steel sheet 1 first side and second side between be provided with viscoelastic damping material 4.
One end face of the viscoelastic damping material 4 is connected with the first side face of the U-shaped steel plate 1 with the low yield point through an upper cover plate 5, and the other end face of the viscoelastic damping material 4 is connected with the second side face of the U-shaped steel plate 1 with the low yield point through a lower cover plate 6.
And a constraint steel plate 7 is arranged on the outer side of the viscoelastic damping material 4.
The upper cover plate 5 is connected with the beam through a connecting plate 8, the lower cover plate 6 is connected with the support through a support connecting plate 9, and the connecting piece is a high-strength bolt 10.
The upper cover plate 5 is provided with bolt holes opposite to the anti-pulling and non-shearing holes 2 on the U-shaped low yield point steel plate 1 and is connected through high-strength bolts 10, and the lower cover plate 6 is connected with the U-shaped low yield point steel plate 1 through the high-strength bolts 10.
The yield point of the U-shaped low-yield-point steel plate 1 is 235N/mm2Or 100N/mm2 steel roll.
The main material (base material) of the viscoelastic material 4 is a high molecular polymer with viscoelastic property, butyl rubber is selected as the base material, a modifier is added to form the damping material, and the shear modulus and the loss factor of the damping material meet the engineering use requirements.
And the viscoelastic material 4 and the constraint steel plate 7 are bonded through processes such as vulcanization and the like.
The anti-pulling and non-shearing bolt holes 2 are made of special foam filling materials, so that anti-pulling and non-shearing connection is realized.
The hollow structure be U type structure, resistance to plucking bolt hole (2) that does not shear be the bar structure of symmetry setting, ordinary bolt hole (3) be provided with a plurality ofly, with resistance to plucking bolt hole (2) that does not shear correspond the setting from top to bottom at same vertical position.
The dual energy dissipation damper can be applied to a supporting frame system.
The invention has the beneficial effects that:
1) the damper can play a good energy consumption role under earthquakes with different intensities.
2) Under the action of 'small vibration' and wind vibration, the U-shaped low-yield-point steel plate does not participate in the work, so that the fatigue resistance of the steel is indirectly improved, and the problem that the influence of a metal damper on the structural rigidity is undefined is avoided.
3) Under the action of 'middle shock', the U-shaped steel plate with the low yield point enters an elastoplasticity stage, so that short plates with poor energy consumption of the viscoelastic material under large strain are compensated, and the utilization rate of the viscoelastic material is indirectly improved.
4) Under the action of 'heavy shock', the viscoelastic material generates large strain and the energy consumption capability is insufficient, and the U-shaped steel plate with low yield point enters a plasticity stage, so that the energy consumption reliability of the damper can be improved.
5) Due to the adoption of the dual energy consumption type damper, the design limit value of the component of the main body structure can be properly widened, and the economic benefit can be improved.
Drawings
Fig. 1 is a schematic structural view of the dual dissipative damper of the present invention.
FIG. 2 is a schematic structural view of a U-shaped low yield point steel plate.
FIG. 3 is a schematic diagram of the structure of a viscoelastic damping material and a cushion steel plate.
Fig. 4 is a schematic view of the structure of the upper and lower cover plates and the high-strength bolt.
FIG. 5 is a schematic diagram of a support frame structure system according to the present invention.
Fig. 6 is a first schematic view of a supporting frame node structure.
Fig. 7 is a schematic diagram of a supporting frame node structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the dual energy dissipation damper of the present invention comprises a U-shaped low yield point steel plate 1, a viscoelastic material 4 based on butyl rubber, a cushion steel plate 7 for restraining the viscoelastic material, and a high strength bolt 10 for assembly.
As shown in FIG. 2, the U-shaped low yield point steel sheet 1 of the present invention has a yield strength of 235N/mm2Or a yield strength of 100N/mm2The steel plates are rolled and formed, then are connected through butt welding, and after the steel plates are formed, common bolt holes and anti-pulling and non-shearing bolt holes 2 are formed in the U-shaped low-yield-point steel plates 1 so as to facilitate installation.
As shown in fig. 3, the viscoelastic material 4 and the constraint steel plate 7 of the present invention are constructed by bonding a viscoelastic material based on butyl rubber and a backing steel plate by a vulcanization process, and for the sake of easy installation, steel plates 5 and 6 are provided at the ends and bolt holes are provided.
As shown in FIG. 4, in the connecting plate of the present invention, a connecting plate 9 is provided on the top of the support for easy installation, and bolt holes are provided on the connecting plate. Connecting plates 8 are embedded at the bottoms of the beams, and bolt holes are formed so that the dampers can be conveniently installed.
The installation process of the double energy consumption type damper is as follows:
1) and (3) selecting a qualified low-yield-point steel plate to be rolled, welding the rolled U-shaped steel, and arranging a bolt hole to form the U-shaped low-yield-point steel plate 1 after welding.
2) The viscoelastic material 4 and the constraint steel plate 7 are bonded together through a vulcanization process, and holes are formed in the end cover plates.
3) And connecting the bonded viscoelastic material 4 with the connecting plates 5 and 6, the U-shaped low-yield-point steel plate 1 and the connecting plates 8 and 9 through high-strength bolts 10.
As shown in figure 5, the double-energy-consumption type damper is arranged at the bottom of a beam through the herringbone support, and energy consumption of the damper is realized when vibration occurs between structural layers.
As shown in figure 6, the support is connected with the connecting plate through four-side circumferential welding at the bottom of the damper, the connecting plate is provided with bolt holes, and then the connecting plate is connected with the damper through high-strength bolts.
As shown in figure 7, the support connection of the invention is realized by embedding connecting plates at the beam column nodes at the bottom of the support, inserting the support into the two connecting plates and connecting the two connecting plates through fillet welds.
The yield point of the U-shaped low-yield-point steel plate 1 is 235N/mm2Or 100N/mm2The steel material is rolled and formed, the main reason for manufacturing the hollow structure is to reduce the yield load, indirectly improve the local bearing capacity of the anti-pulling and non-shearing bolt hole 2, and in addition, the arc-shaped opening can enable the stress to be transmitted uniformly and generate bending yield under the action of an earthquake.
The viscoelastic material 4 and the main material (base material) of the viscoelastic damping material 4 are high molecular polymers with viscoelastic characteristics, butyl rubber is selected as the base material, the damping material is formed by adding a modifier, and the shear modulus and the loss factor of the damping material meet the engineering use requirements.
The viscoelastic material 4 is bonded with the constraint steel plate 7, the viscoelastic material is low in rigidity and easy to deform, design parameters are not easy to control, and in order to constrain the viscoelastic material 4, the viscoelastic material 4 and the constraint steel plate 7 are bonded together through a vulcanization process. The vulcanization process is mature and reliable, and the bonding strength of the vulcanized rubber is found to be stronger than the shear strength of a viscoelastic material in previous researches.
The upper cover plate 5 and the lower cover plate 6 are connected, the cover plates are arranged on the constraint steel plates 7 at the two ends, the bolt holes arranged on the upper cover plate 5 are opposite to the anti-pulling and non-shearing holes 2 on the U-shaped low yield point steel plate 1, the upper cover plate 5 is connected with the U-shaped low yield point steel plate 1 through high-strength bolts 10, and the lower cover plate 6 is connected with the U-shaped low yield point steel plate 1 through the high-strength bolts.
The anti-pulling and non-shearing connecting technology is characterized in that the sliding direction of a bolt is artificially set, so that the high-strength bolt is free from shearing force in the sliding direction. The technology is successfully applied to the connecting piece of the steel-concrete composite beam to solve the problem of concrete cracking in the hogging moment area of the steel-concrete composite beam. The special foam filling material is mainly adopted to realize the connection of resistance to plucking and non-shearing.
The dual energy dissipation damper can be applied to a supporting frame system.
The working principle of the invention is as follows:
under the action of wind vibration or small vibration, the structural floor beam generates horizontal displacement to drive the connecting plate 8, the connecting plate 8 drives the upper cover plate 5 to move in the anti-pulling and non-shearing bolt hole 2 through the high-strength bolt 10, so that the viscoelastic material generates shear deformation, and energy consumption is realized; under the action of a medium shock, the high-strength bolt 10 is in contact with the end part of the anti-pulling and non-shearing bolt hole to drive the U-shaped steel plate 1 with the low yield point to roll, so that the steel with the low yield point is yielded, and the viscoelastic material and the steel with the low yield point participate in energy dissipation; under the action of a large shock, the viscoelastic material generates large shearing strain, the energy consumption capacity is insufficient, at the moment, the U-shaped low-yield-point steel plate generates large rolling deformation, the plastic deformation is increased, and the low-yield-point steel mainly contributes to energy consumption.
According to the design principle of an anti-seismic concept, the structure is provided with a plurality of anti-seismic defense lines, so that the damage and even collapse of the main body structure caused by insufficient energy consumption of the viscoelastic material under large strain are avoided. Meanwhile, the material advantages of the low yield point steel and the viscoelastic material are reasonably utilized. Under the action of 'small vibration' and wind vibration, the viscoelastic material consumes energy, the low-yield-point steel does not participate in the work, and the fatigue performance of the steel is indirectly improved; under the action of 'middle shock', the low-yield-point steel and the viscoelastic material work simultaneously, and the energy consumption is reliable; under the action of 'heavy shock', the viscoelastic material has insufficient energy consumption, the low-yield-point steel has greatly increased energy consumption, and the short plate with insufficient energy consumption of the viscoelastic material is compensated.

Claims (10)

1. The utility model provides a dual power consumption type attenuator, its characterized in that, includes U-shaped low yield point steel sheet (1), U-shaped low yield point steel sheet (1) be two, end to end forms ring structure, the U-shaped department of U-shaped low yield point steel sheet (1) be hollow out construction, U-shaped low yield point steel sheet (1) first side seted up resistance to plucking bolt hole (2) that does not shear, U-shaped low yield point steel sheet (1) second side seted up ordinary bolt hole (3), U-shaped low yield point steel sheet (1) first side and second side between be provided with viscoelastic damping material (4).
2. A dual dissipative damper according to claim 1, wherein one end of the viscoelastic damping material (4) is connected to the first side of the U-shaped steel plate (1) with low yield point through the upper cover plate (5) and the other end of the viscoelastic damping material (4) is connected to the second side of the U-shaped steel plate (1) with low yield point through the lower cover plate (6).
3. A dual dissipative damper according to claim 1, wherein the viscoelastic damping material (4) is provided with a restraining steel plate (7) on the outside; the viscoelastic material (4) and the constraint steel plate (7) are bonded through a vulcanization process.
4. A dual dissipative damper according to claim 1, wherein the upper cover plate (5) is connected to the beam by means of a connecting plate (8), the lower cover plate (6) is connected to the support by means of a support connecting plate (9), and the connecting piece is a high strength bolt (10).
5. The dual energy dissipation type damper as recited in claim 4, wherein the upper cover plate (5) is provided with bolt holes opposite to the anti-pulling and non-shearing resistant holes (2) of the U-shaped low yield point steel plate (1) and is connected through high-strength bolts (10), and the lower cover plate (6) is connected with the U-shaped low yield point steel plate (1) through the high-strength bolts (10).
6. A dual dissipative damper according to claim 1, wherein the U-shaped steel sheet (1) with low yield point has a yield point of 235N/mm2Or 100N/mm2Rolling and forming the steel material.
7. The dual energy dissipation type damper as recited in claim 1, wherein the main material of the viscoelastic material (4) is a high molecular polymer with viscoelastic properties, butyl rubber is selected as a base material, and a modifier is added to form the damping material, so that the shear modulus and the loss factor of the damping material meet the engineering use requirements.
8. The dual dissipative damper according to claim 1, wherein the anti-pulling and anti-shearing bolt holes (2) are made of special foam filling material to achieve the anti-pulling and anti-shearing connection.
9. The dual energy dissipation type damper as claimed in claim 1, wherein the hollowed-out structure is a U-shaped structure, the anti-pulling and non-shearing bolt holes (2) are symmetrically arranged in a strip-shaped structure, and a plurality of common bolt holes (3) are arranged to correspond to the anti-pulling and non-shearing bolt holes (2) at the same vertical position.
10. Use of the dual dissipative damper of claim 1 in a braced frame system.
CN202010663856.2A 2020-07-10 2020-07-10 Dual energy consumption type damper Pending CN111691566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010663856.2A CN111691566A (en) 2020-07-10 2020-07-10 Dual energy consumption type damper

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Application Number Priority Date Filing Date Title
CN202010663856.2A CN111691566A (en) 2020-07-10 2020-07-10 Dual energy consumption type damper

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CN111691566A true CN111691566A (en) 2020-09-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112281641A (en) * 2020-10-16 2021-01-29 中冶南方城市建设工程技术有限公司 Grid damping support
CN112900670A (en) * 2021-01-22 2021-06-04 江南大学 Replaceable sectional yielding metal energy dissipation damper
CN113982345A (en) * 2021-10-18 2022-01-28 东南大学 Composite metal sleeve viscoelastic damper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112281641A (en) * 2020-10-16 2021-01-29 中冶南方城市建设工程技术有限公司 Grid damping support
CN112281641B (en) * 2020-10-16 2022-06-03 中冶南方城市建设工程技术有限公司 Grid damping support
CN112900670A (en) * 2021-01-22 2021-06-04 江南大学 Replaceable sectional yielding metal energy dissipation damper
CN113982345A (en) * 2021-10-18 2022-01-28 东南大学 Composite metal sleeve viscoelastic damper
CN113982345B (en) * 2021-10-18 2023-02-21 东南大学 Composite metal sleeve viscoelastic damper

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