CN114541850B - Roof garden vibration reduction and energy dissipation device based on particle mass damping - Google Patents
Roof garden vibration reduction and energy dissipation device based on particle mass damping Download PDFInfo
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- CN114541850B CN114541850B CN202210149476.6A CN202210149476A CN114541850B CN 114541850 B CN114541850 B CN 114541850B CN 202210149476 A CN202210149476 A CN 202210149476A CN 114541850 B CN114541850 B CN 114541850B
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- 238000013016 damping Methods 0.000 title claims abstract description 140
- 239000002245 particle Substances 0.000 title claims abstract description 117
- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 25
- 230000009467 reduction Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 230000008859 change Effects 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 21
- 239000004575 stone Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/32—Roof garden systems
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Botany (AREA)
- Vibration Dampers (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to a roof garden vibration reduction and energy dissipation device based on particle mass damping, which comprises a box body, and a particle damping unit and a silt damping unit which are movably arranged in the box body, wherein the particle damping unit comprises water and particle balls and is divided into a plurality of particle damping unit chambers by a baffle plate; the silt damping unit chamber is connected with the pipeline through an energy dissipation spring; the controller can adjust the rotating speed of the water turbine and the switch of the water control valve to realize the rigidity change of the particle damping unit, the water flow generated by the pipeline is utilized to drive the water turbine to recover energy, and the recovered energy can be used by the pressure sensor, the sprinkler and the controller; the water in the box body can form a closed loop by the silt damping unit chamber, the particle damping unit chamber, the water tank, the pipeline and the sprinkler, so that water resources are fully utilized, and the purposes of multi-mechanism controllable energy consumption and green energy conservation are realized.
Description
Technical Field
The invention belongs to the field of vibration control of civil structures, and particularly relates to a roof garden vibration reduction and energy dissipation device based on particle mass damping.
Background
With the improvement of living standard of people, people put forward higher demands on working and living environment, so that the work of increasing urban greening area and improving the increasingly worsened living environment becomes a urgent problem to be solved. Today, urban architecture is evolving towards multiple floors, high floors and high densities, and urban green space is being consumed gratuitously year by year. In order to develop urban greening space, large parks and the like are newly built in many large and medium cities, but in general, the development in the horizontal direction cannot meet the requirements. Therefore, the method opens up landscaping sites on new and reconstructed old buildings, builds roof gardens, and is an effective way for increasing urban green land areas. If the energy dissipation and shock absorption functions of the roof garden can be developed, the greening environment and shock absorption and disaster reduction are unified. Thus, the urban greening problem is solved, and the aim of reducing urban earthquake disasters is fulfilled.
For example, patent CN108476805A discloses a building vibration damping and energy dissipating device combined with roof greening technology, in which a vegetation layer (1), a planting base layer (2), an aquifer (3), a first filter screen (6), a filter layer (4), a second filter screen (7) and a drainage layer (5) are sequentially arranged in a metal outer box (10) from top to bottom, wherein the drainage layer (5) comprises a plurality of solid particles (9) and a drainage outlet (8) at the upper part of the layer.
Particle dampers are a passive control technology developed from traditional impact dampers, which have been studied and applied in the mechanical and aerospace fields. Particle damping is an additional mass type passive damping technology, which is characterized in that a certain amount of particles such as metal, tungsten carbide or ceramic are filled in a limited enclosed space in a vibration body or an additional cavity outside the vibration body, and vibration energy of a system is consumed by utilizing friction and collision between particles and the cavity wall, so that damping is provided for a main body structure, and the response of the main body structure is weakened. The method has the advantages of simple concept, low price, good durability, high reliability, insensitivity to temperature change, good performance under a wide frequency band and the like, is particularly easy to use in a long-term severe environment (such as high temperature, severe cold, greasy dirt and the like), and can fully play a role in occasions where a viscoelastic damping structure is not suitable to be used, and special maintenance and replacement are not needed.
However, the particle damper at the present stage also has some disadvantages and shortcomings: (1) the noise is high when particles collide; (2) Particles in the traditional particle damper are stacked together, and particle collision efficiency is low; (3) When the traditional particle damper works, the energy dissipation mechanism is single; (4) The energy dissipation is mostly dissipated in the form of heat, and the recycling of the energy is not realized. Therefore, the damping effect is effectively enhanced, the damping performance is improved, and the damping control method has great significance for damping control of a roof garden.
Disclosure of Invention
The invention aims to solve the problems of large noise, low collision efficiency, single energy dissipation mechanism, unrecoverable energy and the like when particles collide when the conventional particle damper is applied to a roof garden, and provides a damping and energy dissipation device for the roof garden based on particle mass damping.
The aim of the invention is achieved by the following technical scheme:
The roof garden vibration reduction and energy dissipation device based on particle mass damping comprises a box body, and a particle damping unit and a silt damping unit which are arranged in the box body, wherein the silt damping unit is movably arranged at the upper part of the particle damping unit, and water in the silt damping unit flows into the particle damping unit from the bottom of the silt damping unit;
The silt damping unit comprises a silt damping unit chamber, wherein a vegetation layer, a sandy soil layer and a silt layer are sequentially arranged in the silt damping unit chamber from top to bottom, and a filter screen is arranged at the bottom;
The silt damping unit chamber and the particle damping unit are connected with the water tank through a circulating pipeline;
the silt damping unit chamber is connected with the pipeline through an energy dissipation spring.
Preferably, a sprinkler is arranged on the upper portion of the silt damping unit chamber, the sprinkler is communicated with the particle damping unit chamber of the particle damping unit, water in the particle damping unit chamber is sprayed to the silt damping unit chamber, and water is irrigated to the vegetation layer, the sandy soil layer and the silt layer.
Preferably, a water control valve and a controller are arranged in the pipeline, and the controller detects the pressure of water in the particle damping unit chamber through a pressure sensor to control the opening and closing of the water control valve. The water control valve enables water to realize circulating flow in the whole tank body, and the controller can drain water into or out of the water tank according to actual conditions, so that the recycling of water resources is ensured.
Preferably, a water turbine is arranged in the pipeline, the water turbine is connected with an energy accumulator, energy recovery is carried out through water discharged by the particle damping unit chamber, the energy accumulator stores electric energy generated by the water turbine, and the rotating speed of the water turbine is regulated by a controller.
Preferably, the particle damping unit is divided into a plurality of particle damping unit chambers by a baffle plate; and a particle ball is arranged in the particle damping unit cavity.
Preferably, the baffle is fixedly connected with the silt damping unit chamber, can move along the inner wall of the box body together with the silt damping unit chamber, and can change the volume of the particle damping unit chamber along with the movement of the baffle, so that the water and particle ball movement energy consumption is better driven.
Preferably, the material of the particle balls is any one of ceramics, steel, concrete and stone, and consists of two particle balls with different sizes, wherein the diameter of the large particle ball is 1.5-4 times of that of the small particle ball; the volume of the particle ball is 30% -50% of the volume of the particle damping unit chamber.
Preferably, the two sides of the bottom of the silt damping unit chamber are symmetrically provided with filter screens; the filter screen is divided into an upper part and a lower part, the upper part moves along with the silt damping unit chamber, and the lower part is fixedly connected with the box body, so that water in the silt damping unit chamber is ensured to completely flow into the particle damping unit chamber.
Preferably, the energy dissipation spring is a nonlinear spring, and nonlinear length change occurs during vibration, so that expansion deformation energy dissipation is realized.
Preferably, the ratio of the thickness of the silty layer to the sandy layer is in the range of 0.4 to 0.6; the pore diameter of the filter screen is smaller than 0.075mm, so that the powder soil particles cannot be lost together with water; and stone blocks are placed in the vegetation layer, the sandy soil layer and the silty soil layer.
The particle damping units can consume energy through continuous mutual collision and friction between particle balls and the inner wall of each particle damping unit cavity and between large and small particle balls and continuous sloshing of water and particle balls when the wind/earthquake action is smaller; when the wind/earthquake action is aggravated, the silt damping unit chamber is deformed by the energy-consuming spring to consume energy, meanwhile, the silt soil and the silt in the silt damping unit chamber are liquefied and have different dynamic characteristics with the solids such as the arranged stone, so that the relative motion exists, and the liquefied silt soil and the silt have certain adsorption force and viscous force on the solids in the silt damping unit chamber, so that a mode of a well-known tuned mass damper is formed; the clash damping unit chamber moves together with the baffle plate, the baffle plate can aggravate the collision of the particle ball, and the particle tuned mass damper can be achieved after the clash damping unit chamber is combined with the particle damping unit.
When the structure vibrates horizontally, the controller can adjust the rotating speed of the water turbine and the switch of the water control valve to realize the rigidity change of the particle damping unit; the water flow generated by the pipeline is utilized to drive the water turbine to recover energy, and the recovered energy can be used by the pressure sensor, the sprinkler and the controller; the water in the box body can form a closed loop by the silt damping unit chamber, the particle damping unit chamber, the water tank, the pipeline and the sprinkler, so that water resources are fully utilized, and the purposes of multi-mechanism controllable energy consumption and green energy conservation are realized.
Compared with the prior art, the invention has the following advantages:
1) The particle damping unit is filled with water, so that the energy consumption of the device can be increased, and the noise generated by the device can be effectively reduced.
2) According to the wind/earthquake action, different mechanisms can be adopted to consume energy; when the vibration effect is smaller, the particle damping unit mainly performs energy consumption vibration reduction, and when the vibration degree is larger, besides the vibration reduction energy consumption measures, the silt damping unit and the water turbine also participate in energy consumption, so that multiple mechanism energy consumption is realized, and the vibration reduction effect is improved.
2) The water control valve is connected with the pipeline to form a loop, so that water can realize circulating flow and utilization, energy is dissipated and recycled by the water turbine, and the recycled energy is supplied to the sensor, the sprinkler and the controller for use, so that green energy conservation is realized.
4) The invention not only can discover the energy dissipation and shock absorption functions of the roof garden, but also unifies the greening environment with shock absorption and disaster reduction, thus solving the urban greening problem and achieving the aim of reducing urban earthquake disasters.
Drawings
FIG. 1 is a front elevation view of a roof garden vibration damping and energy dissipating device based on particulate mass damping of the present invention;
FIG. 2 is a schematic diagram of the operation of the pressure sensor of the present invention;
FIG. 3 is a schematic diagram of the working principle of the tuned mass damper of the present invention;
fig. 4 is a schematic diagram of the working principle of the particle tuned mass damper of the present invention.
Reference numerals in the drawings: 1 is a box body, 2 is a vegetation layer, 3 is a sandy soil layer, 4 is a silt layer, 5 is an energy-consuming spring, 6 is a water control valve, 7 is water, 8 is a particle ball, 9 is a water turbine, 10 is a filter screen, 11 is a pipeline, 12 is a controller, 13 is a sprinkler, 14 is a baffle, 15 is a particle damping unit chamber, 16 is a silt damping unit chamber, 17 is a water tank, 18 is an energy accumulator, 19 is a sensor, and 20 is a block stone.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
The roof garden vibration damping and energy dissipating device based on particle mass damping is fixed on the top of a structure to be damped, and the structure is shown in figure 1, and comprises a box body 1, and a particle damping unit and a silt damping unit which are movably arranged in the box body 1, wherein the particle damping unit comprises water 7 and particle balls 8 and is divided into a plurality of particle damping unit chambers 15 by a baffle 14; the silt damping unit chamber 16 is connected with the pipeline 11 through the energy dissipation spring 5.
Specifically, the baffle 14 is fixedly connected with the silt damping unit chamber 16, can move along the inner wall of the box body 1 together with the silt damping unit chamber 16, and can change the volume of the particle damping unit chamber 15 along with the movement of the baffle 14, so that the movement energy consumption of the water 7 and the particle balls 8 is better driven.
Specifically, the material of the particle balls 8 is any one of ceramics, steel, concrete and stone, and consists of two particle balls with different sizes, wherein the diameter of the large particle ball is 1.5-4 times that of the small particle ball; the volume of the particle ball 5 is 30% -50% of the volume of the particle damping unit chamber 15.
Specifically, the silt damping unit comprises a silt damping unit chamber 16, a vegetation layer 2, a sandy soil layer 3, a silt layer 4 and a filter screen 10, wherein the ratio of the silt layer 4 to the sandy soil layer 3 ranges from 0.4 to 0.6; the pore diameter of the filter screen 10 is smaller than 0.075mm, so that the silt particles cannot be lost together with water; the boulders 20 are placed in the vegetation layer 2, sandy soil layer 3, and silty soil layer 4.
In this embodiment, the two symmetrically arranged filter screens 10 are divided into an upper part and a lower part, the upper part moves together with the silt damping unit chamber 16, and the lower part is fixedly connected to the box 1, so that water in the silt damping unit chamber 16 is ensured to completely flow into the particle damping unit chamber 15.
Specifically, the energy dissipation spring 5 is a nonlinear spring, and nonlinear length change occurs during vibration, so that expansion deformation energy dissipation is realized.
The sprinkler 13 and the particle damping unit chamber 15 in the embodiment are communicated through a circulating pipeline 11, the sprinkler 13 can irrigate water 7 to the vegetation layer 2, the sandy soil layer 3 and the silt soil layer 4, and a water control valve 6 is arranged in the pipeline 11, so that the water 7 can realize circulating flow in the whole box body 1;
specifically, the controller 12 can discharge the water 7 into or out of the water tank 17 according to actual conditions, thereby ensuring the recycling of water resources.
The water turbine 9 in the present embodiment is connected to an accumulator 18, energy recovery is performed by the water 7 discharged from the particle damping unit chamber 15, the accumulator 18 stores electric energy generated by the water turbine 9, and the water turbine 9 is regulated in rotation speed (power generation power) by the controller 12.
The controller 12 in this embodiment controls the opening and closing of the water control valve 6 by detecting the pressure of the water 7 in the particle damping unit chamber 15 by means of the pressure sensor 19, as shown in fig. 2.
The device has the concrete working principle that when the wind/earthquake action is smaller, the particle damping units can consume energy through the continuous mutual collision and friction between the particle balls 8 and the inner wall 15 of the cavity of each particle damping unit and between the large particle balls 8 and the continuous sloshing of the water 7 and the particle balls 8; when the wind/earthquake action is intensified, the silt damping unit chamber 16 is deformed by the energy dissipation spring 5 to consume energy, meanwhile, the silt damping unit chamber 16 moves back and forth, the sandy soil 3 and the silt 4 in the silt damping unit chamber 16 are liquefied and have different dynamic characteristics with the solids such as the arranged stone block 20, so that relative movement exists, the sandy soil 3 and the silt 4 flowing after the liquefaction have certain adsorption force and viscous force on the solids in the sandy soil and the silt 4, and a mode of a well-known tuned mass damper is formed, as shown in fig. 3; as the silt damping unit chamber 16 moves with the baffle 14, the baffle exacerbates the collision of the particle ball 8 and the particle tuned mass damper effect is achieved when combined with the particle damping unit, as shown in figure 4.
When the structure vibrates horizontally, the controller 12 can adjust the rotating speed of the water turbine 9 and the switch of the water control valve 6 to realize the rigidity change of the particle damping unit; the water flow generated by the pipeline 11 is utilized to drive the water turbine 9 to recycle energy, and the recycled energy can be used by the pressure sensor 19, the sprinkler 13 and the controller 12; the water 7 in the box body 1 can form a closed loop by the silt damping unit chamber 16, the particle damping unit chamber 15, the water tank 17, the pipeline 11 and the sprinkler 13, water resources are fully utilized, and the purposes of multi-mechanism controllable energy consumption and environmental protection and energy saving are achieved.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (6)
1. The roof garden vibration reduction and energy dissipation device based on particle mass damping is characterized by comprising a box body (1), and a particle damping unit and a silt damping unit which are arranged in the box body (1), wherein the silt damping unit is movably arranged at the upper part of the particle damping unit, and water in the silt damping unit flows into the particle damping unit from the bottom of the silt damping unit;
the silt damping unit comprises a silt damping unit chamber (16), a vegetation layer (2), a sandy soil layer (3) and a silt layer (4) are sequentially arranged in the silt damping unit chamber (16) from top to bottom, and a filter screen (10) is arranged at the bottom;
The silt damping unit chamber (16) and the particle damping unit are connected with the water tank (17) through the circulating pipeline (11);
The silt damping unit chamber (16) is connected with the pipeline (11) through an energy dissipation spring (5);
The particle damping unit is divided into a plurality of particle damping unit chambers (15) by a baffle plate (14); a particle ball (8) is arranged in the particle damping unit chamber (15);
The baffle plate (14) is fixedly connected with the silt damping unit chamber (16), can move along the inner wall of the box body (1) together with the silt damping unit chamber (16), and can change the volume of the particle damping unit chamber (15) along with the movement of the baffle plate (14);
A sprinkler (13) is arranged at the upper part of the silt damping unit chamber (16), the sprinkler (13) is communicated with the particle damping unit chamber (15) of the particle damping unit, water in the particle damping unit chamber (15) is sprayed to the silt damping unit chamber (16), and water (7) is irrigated to the vegetation layer (2), the sandy soil layer (3) and the silt layer (4);
a water control valve (6) and a controller (12) are arranged in the pipeline (11), and the controller (12) detects the pressure of water (7) in the particle damping unit chamber (15) through a pressure sensor (19) to control the switch of the water control valve (6);
The pipeline (11) is internally provided with a water turbine (9), the water turbine (9) is connected with an energy accumulator (18), and energy recovery is carried out through water (7) discharged from the particle damping unit chamber (15).
2. Roof garden vibration damping and energy dissipating device based on particle mass damping according to claim 1, characterized in that the energy storage (18) stores the electric energy generated by the water turbine (9) and that the water turbine (9) is regulated in rotation speed by the controller (12).
3. The roof garden vibration reduction and energy dissipation device based on particle mass damping according to claim 1, wherein the particle balls (8) are made of any one of ceramics, steel, concrete and stone, and consist of two particle balls with different sizes, wherein the diameter of the large particle ball is 1.5-4 times that of the small particle ball; the volume of the particle ball (8) is 30% -50% of the volume of the particle damping unit chamber (15).
4. Roof garden vibration damping and energy dissipating device based on particle mass damping according to claim 1, characterized in that the bottom of the silt damping unit chamber (16) is symmetrically provided with filter screens (10); the filter screen (10) is divided into an upper part and a lower part, the upper part moves along with the silt damping unit chamber (16), and the lower part is fixedly connected with the box body (1).
5. The roof garden vibration reduction and energy dissipation device based on particle mass damping according to claim 1 is characterized in that the energy dissipation spring (5) is a nonlinear spring, and nonlinear length change occurs during vibration, so that telescopic deformation energy dissipation is realized.
6. Roof garden vibration damping and energy dissipating device based on particle mass damping according to claim 1, characterized in that the ratio of the thickness of the silty layer (4) to the sandy soil layer (3) ranges between 0.4 and 0.6; the aperture of the filter screen (10) is smaller than 0.075mm; and the vegetation layer (2), the sandy soil layer (3) and the silt layer (4) are internally provided with a block stone (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149476.6A CN114541850B (en) | 2022-02-18 | 2022-02-18 | Roof garden vibration reduction and energy dissipation device based on particle mass damping |
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| CN202210149476.6A CN114541850B (en) | 2022-02-18 | 2022-02-18 | Roof garden vibration reduction and energy dissipation device based on particle mass damping |
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| CN114541850B true CN114541850B (en) | 2024-04-26 |
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| CN212772481U (en) * | 2020-05-29 | 2021-03-23 | 中交第四航务工程勘察设计院有限公司 | Anti earthquake liquefaction system of sand foundation building |
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| US10094089B2 (en) * | 2015-03-12 | 2018-10-09 | Geopier Foundation Company, Inc. | Soil improvement foundation isolation and load spreading systems and methods |
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