CN109112956B - Multidirectional tensile pulling self-resetting friction support based on TMD - Google Patents
Multidirectional tensile pulling self-resetting friction support based on TMD Download PDFInfo
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- CN109112956B CN109112956B CN201811211988.0A CN201811211988A CN109112956B CN 109112956 B CN109112956 B CN 109112956B CN 201811211988 A CN201811211988 A CN 201811211988A CN 109112956 B CN109112956 B CN 109112956B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 238000013016 damping Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 8
- 238000002955 isolation Methods 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Multidirectional tensile is pulled out from friction support that resets based on TMD belongs to bridge, building engineering field. The device comprises an upper sliding plate, a lower sliding plate, a sliding block, an outer baffle plate, TMDs, springs, a speed reducing ring and a connecting column. A mechanical locking structure is arranged between the sliding block and the upper and lower sliding plates, so that the sliding block has a pull-out resistance function; springs, a speed reducing ring and TMD are arranged between the outer baffle and the sliding block, the speed reducing ring is used for ensuring the synergistic effect of a plurality of groups of springs, and the TMD is fixed on the inner side of the outer baffle; the sliding surfaces between the sliding block and the upper sliding plate and the lower sliding plate are spherical surfaces, the sliding block can freely slide in a horizontal plane, and the residual displacement of the sliding block can be eliminated and self-reset by means of gravity and spring counterforce. The pull out resistance system can resist the vertical displacement of the upper structure caused by earthquake or accidental load.
Description
Technical Field
The invention belongs to the field of bridge engineering and building engineering, and in particular relates to a seismic reduction and isolation support with a tensile pulling requirement for bridge engineering and building engineering.
Background
In recent years, because China is in European Asia seismic zone and Pacific seismic zone, 41% of China has territories, more than half of cities are located in areas with basic earthquake intensity of 7 degrees or more than 7 degrees, and areas with the intensity of 6 degrees and more than 6 degrees account for 79% of the territory area. For bridge engineering and building engineering in strong earthquake areas, the structural earthquake resistance and the post-earthquake recovery capability become important indexes for checking the structural functions.
The seismic isolation support is an important structural anti-seismic component, can prolong the structural vibration period, actively avoid the main energy frequency band of seismic waves, furthest reduce the damage and damage of the earthquake to the upper structure, protect the upper structure function and ensure the life and property safety of human beings.
In the existing sliding friction support, improvement and research are mainly conducted on the aspects of sliding freedom degree, sliding block type and number, sliding surface friction coefficient and the like. For less drawing resistance, only the drawing resistance support is basically in bidirectional sliding, and due to the structural characteristics of the sliding track and the sliding block, good synergistic effect is difficult under the action of the self weight of the upper part and the earthquake; the self-resetting capability basically depends on only the horizontal component of dead weight, and the friction coefficient of the sliding surface has larger influence on the self-resetting; the energy consumption of the support is basically dependent on the friction energy consumption of the sliding surface, but the excessive friction force restricts the self-resetting capability.
Disclosure of Invention
In order to overcome the defects of the drawing-resistant vibration-isolating support, the invention can effectively solve the problems of drawing resistance, energy consumption and self-resetting of the friction vibration-isolating support, has better durability and stability, and can be suitable for bridges and building structures in strong earthquake areas.
The technical scheme of the invention is as follows:
the multidirectional tensile pulling self-resetting friction support based on TMD is characterized by comprising an upper sliding plate (1), a sliding block (2), a lower sliding plate (3), an outer baffle plate (4), a speed reducing ring (5), a spring (6), TMD (frequency modulation mass damping device) (7) and a connecting column (8);
the sliding block (2) comprises a sliding block upper end (2-1), a sliding block main body (2-2) and a sliding block lower end (2-3) which are sequentially rolled together, wherein the sliding block upper end (2-1) is a mushroom-shaped end, the sliding block main body (2-2) is of a cylindrical structure, and the sliding block lower end (2-3) is a crisscross plate-shaped limiting end;
the outer baffle (4) comprises a barrel-shaped vertical plate (4-1) and an annular bottom end surface (4-2), and the barrel-shaped vertical plate (4-1) is fixed with the outer side of the annular bottom end surface (4-2); a plurality of springs (6) are uniformly distributed and fixed on the inner side of the barrel-shaped vertical plate (4-1), the other ends of the springs (6) are fixed on the periphery of the speed reducing ring (5), and the springs (6) are in a free state; the speed reducing ring (5) is coaxially sleeved outside the sliding block main body (2-2), and a gap is formed between the speed reducing ring (5) and the sliding block main body (2-2); a plurality of TMDs (frequency modulation mass damping devices) (7) are uniformly distributed and fixed on the inner side of the barrel-shaped vertical plate (4-1), a plurality of TMDs (frequency modulation mass damping devices) (7) of the springs (6) are distributed in the same radial plane, and the radial length of the TMDs is smaller than the radial free length of the springs; the annular bottom end surface (4-2) is fixedly connected with the upper end surface of the lower slide plate (3) through a connecting column (8); a gap is formed between the annular bottom end surface (4-2) and the upper end surface of the lower slide plate (3), and a cross plate type limiting end of the lower end head (2-3) of the slide block is inserted into the gap between the annular bottom end surface (4-2) and the upper end surface of the lower slide plate (3);
the lower surface of the upper sliding plate (1) is provided with a tongue-and-groove matched with the upper end head (2-1) of the sliding block.
All contact surfaces between the sliding block (2) and the upper sliding plate (1) and between the sliding block and the lower sliding plate (3) adopt spherical surfaces with consistent curvatures.
The whole of the crisscross plate type limiting end head of the lower end head (2-3) of the sliding block is of a spherical plate type; the upper surface of the lower sliding plate (3) is a concave spherical surface; the lower surface of the annular bottom end surface (4-2) is a convex spherical surface; the curvatures of the crisscross plate type limiting end of the lower end head (2-3) of the sliding block, the upper surface of the lower sliding plate (3) and the lower surface of the annular bottom end surface (4-2) are the same.
The lower surface of the upper sliding plate (1) is provided with a tongue-and-groove, and the upper end of the sliding block (2) is provided with an enlarged mushroom-shaped end head, so that the sliding block (2) can rotate in the tongue-and-groove of the upper sliding plate (1) in a small amplitude but cannot be separated from the upper sliding plate (1). 4 limit ends are arranged below the sliding block (2), the whole shape is a crisscross plate type, and the length of each end is larger than the maximum allowable displacement of the sliding block.
The outer baffle (4) is connected with the speed reducing ring (5) by virtue of springs (6), and the springs are uniformly and symmetrically arranged in the diameter surface, and the number of the springs is a multiple of 4.
TMD (7) fix in outer baffle (4) inboard evenly symmetrical arrangement in the diametral plane, TMD (7) number is the multiple of 4, TMD (7) are greater than outer baffle (4) lower extreme horizontal plate width along outer baffle (4) radial length, and are less than the initial length of spring (6) when slider (2) are in central point.
The upper sliding plate (1), the sliding block (2), the lower sliding plate (3), the outer baffle plate (4), the speed reducing ring (5), the spring (6) and the connecting column (8) are made of stainless steel materials, and the sliding surfaces are made of polytetrafluoroethylene materials.
A mechanical locking structure is arranged between the sliding block (2) and the upper and lower sliding plates (1, 3), so that the sliding block has a pulling-out resistance function; springs, a speed reducing ring and TMD are arranged between the outer baffle and the sliding block, the speed reducing ring is used for ensuring the synergistic effect of a plurality of groups of springs, and the TMD is fixed on the inner side of the outer baffle; the sliding surfaces between the sliding block and the upper sliding plate and the lower sliding plate are spherical surfaces, the sliding block can freely slide in a horizontal plane, and the residual displacement of the sliding block can be eliminated and self-reset by means of gravity and spring counterforce. The pull out resistance system can resist the vertical displacement of the upper structure caused by earthquake or accidental load.
The invention has the following advantages: compared with a common friction vibration isolation support, the invention has better energy consumption and self-resetting function, and can greatly reduce the damage of vertical seismic waves to an upper structure; compared with the existing anti-pulling support, the invention can ensure that the upper structure can freely slide in the horizontal plane, and the spring system is utilized to ensure the self-resetting capability, thereby greatly reducing the residual displacement of the support after earthquake; compared with the existing support, the invention introduces TMD into the support, thereby greatly enhancing the shock absorption and isolation and energy consumption capabilities of the support. The invention is suitable for bridges and building structures in strong earthquake areas, and has better shock absorption and isolation effects on curved bridges and high-rise buildings.
Drawings
Fig. 1 is a schematic perspective view of a multi-directional tensile self-resetting friction support based on TMD
FIG. 2 is a schematic diagram of the inside of a TMD-based multidirectional tensile self-resetting friction support
FIG. 3 is a cross-sectional view of a TMD-based multidirectional anti-pull self-resetting friction support
FIG. 4 is a perspective view of a TMD-based multidirectional tensile self-resetting friction support slider
FIG. 5 is a 1/2 cross-sectional view of a TMD-based multidirectional anti-pull self-resetting friction support outer baffle
FIG. 6 is a vertical cross-sectional view of a TMD-based multidirectional tensile self-resetting friction support with maximum displacement
FIG. 7 is a horizontal cross-sectional view of a TMD-based multi-directional pull-out self-resetting friction support maximum displacement;
in the figure: 1-an upper slide plate; 2-a sliding block; 2-1, the upper end of the slide block; 2-a slider body; 2-3-the lower end of the sliding block; 3-a lower slide plate; 4-an outer baffle; 4-1, a barrel-shaped vertical plate; 4-2-annular bottom end face; 5-a speed reducing ring; 6, a spring; 7-TMD; 8-connecting column.
Detailed Description
Embodiments of the present invention are further described below with reference to fig. 1-7.
When an earthquake acts, the upper sliding plate (1) moves along with the upper structure, the lower sliding plate (3) moves along with the ground, and the middle sliding block (2) slides. When the displacement of the sliding block (2) reaches a certain range, the sliding block (2) contacts the speed reducing ring (5) and continuously slides with the speed reducing ring (5), the surrounding springs (6) store spring potential energy due to the movement of the speed reducing ring (5) and the extension and compression of the speed reducing ring (5), and the spring potential energy and the spring counter force are increased along with the increase of the displacement of the speed reducing ring (5); when the displacement is further expanded, the deceleration ring (5) collides and contacts with the TMD (7), the TMD (7) structure plays the roles of energy consumption and damping, and the damage of earthquake energy to the structure is reduced; when the displacement of the sliding block (2) is continuously increased, the sliding block (2) finally collides with the annular bottom end surface (4-2) of the outer baffle, and the sliding block (2) cannot move continuously.
At this time, due to the influence of the self weight of the upper structure, the sliding block (2) can receive a horizontal restoring force, the direction is directed to the center of the lower sliding plate (3), and the traditional support cannot reset by itself due to the large static friction force. The support ensures that the sliding block (2) slides reciprocally and finally the sliding block (2) returns to the central position because the potential energy of the spring is larger and the horizontal component force of the self weight of the upper structure is larger than the static friction force.
The following requirements should be noted in the manufacture of the support:
1. the curvature of the sliding block (2) and the sliding plate surface contacted with the sliding block is consistent, and spherical surfaces or other reasonable curved surfaces are adopted;
2. the upper sliding plate (1) is provided with a tongue and groove to ensure that the sliding block (2) can rotate in a small amplitude but cannot be separated from the sliding plate, and the upper sliding plate (1) can be ensured to be basically horizontal so as to meet the requirement that the upper building or the bridge structure integrally moves under the condition of not being unstable.
3. 4 limit ends, namely a lower end (2-3) of the slide block, are arranged below the slide block (2), the linearity of the limit ends meets the requirement of the slide block on the 1 st point, the rigidity is enough, and the free length of the ends is larger than the maximum displacement of the slide block.
The TMD (7) energy consumption device is required to meet the energy consumption requirement, and a proper TMD device is selected according to the size of the support and the self weight of the upper structure.
5. The springs (6) are arranged according to the self weight of the upper structure, the strength and the rigidity of the springs are selected through calculation, and each group can be cooperated with a plurality of springs.
6. The anti-drawing integral force transmission way is as follows: the upper structure (building and bridge) -upper sliding plate (1) -upper end head (2-1) -main body (2-2) -lower end head (2-3) -outer baffle (4) -connecting column (8) -lower sliding plate (3) -ground.
Claims (4)
1. The multidirectional tensile pulling self-resetting friction support based on TMD is characterized by comprising an upper sliding plate (1), a sliding block (2), a lower sliding plate (3), an outer baffle plate (4), a speed reducing ring (5), a spring (6), TMD (frequency modulation mass damping device) (7) and a connecting column (8);
the sliding block (2) comprises a sliding block upper end (2-1), a sliding block main body (2-2) and a sliding block lower end (2-3) which are sequentially rolled together, wherein the sliding block upper end (2-1) is a mushroom-shaped end, the sliding block main body (2-2) is of a cylindrical structure, and the sliding block lower end (2-3) is a crisscross plate-shaped limiting end;
the outer baffle (4) comprises a barrel-shaped vertical plate (4-1) and an annular bottom end surface (4-2), and the barrel-shaped vertical plate (4-1) is fixed with the outer side of the annular bottom end surface (4-2); a plurality of springs (6) are uniformly distributed and fixed on the inner side of the barrel-shaped vertical plate (4-1), the other ends of the springs (6) are fixed on the periphery of the speed reducing ring (5), and the springs (6) are in a free state; the speed reducing ring (5) is coaxially sleeved outside the sliding block main body (2-2), and a gap is formed between the speed reducing ring (5) and the sliding block main body (2-2); a plurality of TMDs (frequency modulation mass damping devices) (7) are uniformly distributed and fixed on the inner side of the barrel-shaped vertical plate (4-1), a plurality of TMDs (frequency modulation mass damping devices) (7) of the springs (6) are distributed in the same radial plane, and the radial length of the TMDs is smaller than the radial free length of the springs; the annular bottom end surface (4-2) is fixedly connected with the upper end surface of the lower slide plate (3) through a connecting column (8); a gap is formed between the annular bottom end surface (4-2) and the upper end surface of the lower slide plate (3), and a cross plate type limiting end of the lower end head (2-3) of the slide block is inserted into the gap between the annular bottom end surface (4-2) and the upper end surface of the lower slide plate (3);
the lower surface of the upper sliding plate (1) is provided with a tongue-and-groove matched with the upper end head (2-1) of the sliding block;
the whole of the crisscross plate type limiting end head of the lower end head (2-3) of the sliding block is of a spherical plate type; the upper surface of the lower sliding plate (3) is a concave spherical surface; the lower surface of the annular bottom end surface (4-2) is a convex spherical surface; the curvatures of the crisscross plate type limiting end of the lower end (2-3) of the sliding block, the upper surface of the lower sliding plate (3) and the lower surface of the annular bottom end surface (4-2) are the same;
the lower surface of the upper sliding plate (1) is provided with a tongue-and-groove, and the upper end of the sliding block (2) is provided with an enlarged mushroom-shaped end head, so that the sliding block (2) can rotate in the tongue-and-groove of the upper sliding plate (1) but cannot be separated from the upper sliding plate (1); the cross plate type limiting end head is arranged below the sliding block (2), and the length of the end head is larger than the maximum allowable displacement of the sliding block.
2. The multi-directional pull-out self-resetting friction support based on TMD according to claim 1, characterized in that the outer baffle (4) is connected with the speed reducing ring (5) by means of springs (6), the springs are uniformly and symmetrically arranged in the diameter plane, and the number of the springs is a multiple of 4.
3. The multi-directional pull-out self-reset friction support based on TMD according to claim 1, wherein the TMD (7) is fixed on the inner side of the outer baffle plate (4), and is uniformly and symmetrically arranged in the diameter surface, the number of TMDs (7) is a multiple of 4, and the radial length of the TMD (7) along the outer baffle plate (4) is larger than the horizontal plate width at the lower end of the outer baffle plate (4) and smaller than the initial length of the spring (6) when the sliding block (2) is at the central position.
4. The multi-directional pull-out self-resetting friction support based on TMD according to claim 1, wherein the upper sliding plate (1), the sliding block (2), the lower sliding plate (3), the outer baffle plate (4), the speed reducing ring (5), the spring (6) and the connecting column (8) are made of stainless steel materials, and each sliding surface is made of polytetrafluoroethylene materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811211988.0A CN109112956B (en) | 2018-10-18 | 2018-10-18 | Multidirectional tensile pulling self-resetting friction support based on TMD |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811211988.0A CN109112956B (en) | 2018-10-18 | 2018-10-18 | Multidirectional tensile pulling self-resetting friction support based on TMD |
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| CN109112956B true CN109112956B (en) | 2024-01-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058545B (en) * | 2020-01-02 | 2021-04-16 | 株洲时代新材料科技股份有限公司 | Anti-pulling device and shock insulation protection method |
| CN112391947B (en) * | 2020-11-20 | 2022-05-13 | 中北大学 | Three-dimensional shock insulation support |
| CN113006285B (en) * | 2021-03-10 | 2022-03-15 | 中建三局集团有限公司 | Multistage shock insulation friction pendulum support with resistance to plucking function |
| CN113463789B (en) * | 2021-07-22 | 2022-10-18 | 青岛理工大学 | Tuned mass damper for controlling wind vibration of super high-rise building |
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2018
- 2018-10-18 CN CN201811211988.0A patent/CN109112956B/en active Active
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|---|---|---|---|---|
| JP2003221943A (en) * | 2001-11-22 | 2003-08-08 | Bridgestone Corp | Slidable bearing structure |
| CN101672074A (en) * | 2009-09-25 | 2010-03-17 | 北京工业大学 | Drum-type omni-directional turned mass damper |
| CN103233529A (en) * | 2013-05-21 | 2013-08-07 | 上海大学 | Three-dimensional tuned mass damper device with clamping groove |
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| CN109112956A (en) | 2019-01-01 |
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