CN115341677B - Prestressed self-resetting energy-dissipation inhaul cable support - Google Patents
Prestressed self-resetting energy-dissipation inhaul cable support Download PDFInfo
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- CN115341677B CN115341677B CN202211072683.2A CN202211072683A CN115341677B CN 115341677 B CN115341677 B CN 115341677B CN 202211072683 A CN202211072683 A CN 202211072683A CN 115341677 B CN115341677 B CN 115341677B
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- threaded rod
- friction
- ratchet wheel
- self
- resetting
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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
-
- 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
-
- 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
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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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)
- Transmission Devices (AREA)
Abstract
The invention discloses a prestress-free self-resetting energy-consumption cable support which comprises a connecting piece, an outer sleeve, a threaded rod, an inner sleeve, a ratchet wheel, an energy-consumption mechanism, a self-resetting mechanism and a steel cable. The self-resetting energy-consumption inhaul cable support is realized by mainly relying on the unidirectional rotation characteristic of a ratchet wheel and a spring, wherein the prestress-free effect of the self-resetting energy-consumption inhaul cable support is realized by the following steps: because the thread part of the threaded rod is connected with the central screw hole of the ratchet wheel, when the threaded rod bears the downward movement of the tensile force, the spring is compressed, the ratchet wheel and the ratchet wheel sleeve are driven to rotate unidirectionally, the static friction force of the friction mechanism is overcome, the rotation friction is started, and therefore the energy of the earthquake input structure is dissipated in the form of friction heat energy, and the effects of protecting the support and the structure are achieved; when the pulling force is removed, the threaded rod performs upward reset motion under the action of the restoring force of the spring, the ratchet wheel and the ratchet wheel sleeve do not rotate, and self-reset can be freely realized due to no friction resistance.
Description
Technical Field
The invention relates to an anti-seismic support structure, in particular to a self-resetting support structure.
Background
Engineering structures often generate larger residual deformation after earthquake, which causes serious threat to personnel and structure safety, and repair after earthquake is difficult and costly. The self-resetting support is a novel anti-seismic support form, has obvious technical advantages for improving the anti-seismic performance of engineering structures, particularly reducing the residual deformation of the structures after earthquake, and accords with the development direction of future anti-seismic technology.
The existing self-resetting function of the self-resetting support is realized mainly by means of a shape memory alloy or a prestress technology. The shape memory alloy has super-elastic effect and shape memory effect, and can be restored by heating or unloading, but the shape memory alloy has high price and is greatly influenced by environmental temperature, so that the shape memory alloy is difficult to popularize and apply in engineering. The self-resetting support based on the prestressing technology can adopt a prestressing material or a prestressing spring as a resetting member to provide the restoring force of the support. However, the self-resetting support has complicated prestressing process, special tensioning equipment is needed, and the prestressing control and anchoring measures are required to be high, otherwise, the self-resetting effect is affected.
Disclosure of Invention
The invention aims to: aiming at the prior art, the self-resetting energy-consumption inhaul cable support free of prestress is provided, and the functions of self-resetting and energy consumption can be realized without adopting a shape memory alloy material or applying prestress.
The technical scheme is as follows: a prestress-free self-resetting energy-dissipation inhaul cable support comprises an outer sleeve, a threaded rod, an inner sleeve, a ratchet wheel, an energy-dissipation mechanism, a self-resetting mechanism and a steel inhaul cable;
the inner sleeve and the outer sleeve are coaxially arranged, and balls are arranged between the inner sleeve and the outer sleeve; a ratchet groove is formed in the inner sleeve, and a ratchet is embedded into the ratchet groove; the outer diameter of the lower part of the inner sleeve is smaller than that of the upper part, and a circular friction plate is fixedly connected to the bottom of the inner sleeve; the threaded rod is positioned on the central axis of the inner sleeve and is connected with the central screw hole of the ratchet wheel, and the lower end of the threaded rod penetrates out from the central hole at the lower end of the outer sleeve;
the energy consumption mechanism comprises an upper pressing plate, a lower pressing plate, an upper friction ring and a lower friction ring; the upper pressing plate and the upper friction ring are sleeved at the lower part of the inner sleeve, and the upper friction ring is positioned between the upper pressing plate and the upper surface of the friction plate; the lower pressing plate and the lower friction ring are sleeved on the threaded rod, and the lower friction ring is positioned between the lower surface of the friction plate and the lower pressing plate; the bottom surface of the lower pressing plate is fixed with the inner wall of the outer sleeve through a plurality of stiffening plates; the upper friction ring and the upper surface of the friction plate form a rotary friction pair, the lower friction ring and the lower surface of the friction plate form a rotary friction pair, and the upper pressure plate and the lower pressure plate are connected through a plurality of bolts to apply pretightening force;
the self-resetting mechanism comprises a spring end plate, a spring and a inhaul cable connecting piece; the spring end plate is fixed at the lower part of the threaded rod, and the spring is sleeved on the threaded rod and is positioned between the spring end plate and the lower end of the outer sleeve; the steel inhaul cable is fixed at the bottom of the inhaul cable connecting piece through an anchoring end head, and the inhaul cable connecting piece is connected with the bottom end of the threaded rod through internal threads;
the ratchet wheel can rotate unidirectionally around the central axis of the inner sleeve, and when the threaded rod moves downwards, the ratchet wheel is driven to rotate, and the ratchet wheel rotates to drive the ratchet sleeve to rotate.
Further, threads are arranged at two ends of the threaded rod, the middle part is smooth, and the diameter of the threaded part is consistent with that of the smooth part.
Further, a rubber gasket is provided between the outer sleeve and the cable connector.
The beneficial effects are that: the novel damping prestress-free self-resetting energy-consumption cable support structurally comprises an outer sleeve, a ratchet wheel, an energy-consumption mechanism, a self-resetting mechanism and a steel cable, and has the advantages that compared with the existing self-resetting energy-consumption cable support:
the self-resetting function is realized without applying prestress. Under the action of earthquake, the support is in two states of repeated loading and unloading, wherein the unloading is the process of support resetting. Because of the existence of the ratchet wheel, the ratchet wheel clamps the ratchet wheel groove at the initial stage of the loading process, when the external force is insufficient to overcome the friction force, only the steel inhaul cable plays a supporting role, when the external force is continuously increased, the static friction force is overcome, the ratchet wheel rotates to drive the ratchet wheel sleeve to rotate, and when the ratchet wheel sleeve rotates, the friction plate, the upper friction ring and the lower friction ring generate rotary friction to consume friction energy; when the self-resetting device is used for unloading, the ratchet is separated from the ratchet groove, the ratchet is not contacted with the ratchet sleeve, friction force is not blocked, and the support can freely move to the original position under the action of the restoring force of the spring until the self-resetting is completely restored to the original position.
Drawings
FIG. 1 is a cross-sectional view of a prestress-free self-resetting power-dissipating cable brace of the present invention;
FIG. 2 is a schematic view of a connector structure;
FIG. 3 is a cross-sectional view of the outer sleeve;
FIG. 4 is a schematic view of a threaded rod;
FIG. 5 is a cross-sectional view of the inner sleeve;
FIG. 6 is a schematic view of a ratchet mechanism;
FIG. 7 is a schematic view of a bolt;
FIG. 8 is a schematic view of the upper platen structure;
FIG. 9 is a schematic view of the upper friction ring structure;
FIG. 10 is a schematic view of the lower friction ring structure;
FIG. 11 is a schematic view of the structure of the lower platen;
FIG. 12 is a schematic view of a stiffener structure;
FIG. 13 is a schematic view of a spring construction;
FIG. 14 is a schematic view of a rubber gasket construction;
FIG. 15 is a schematic view of a cable connector structure;
FIG. 16 is a schematic view of an anchor head structure;
fig. 17 is a schematic view of a steel cable structure.
Detailed Description
The invention is further explained below with reference to the drawings.
As shown in fig. 1, the prestress-free self-resetting energy-consumption cable support comprises a connecting piece 1, an outer sleeve 2, a threaded rod 3, an inner sleeve 4, a ratchet wheel 6, an energy-consumption mechanism, a self-resetting mechanism and a steel cable 17.
The inner sleeve 4 is arranged coaxially with the outer sleeve 2. As shown in fig. 3 and 5, the inner wall of the outer sleeve 2 and the outer wall of the inner sleeve 4 are provided with annular grooves in opposite directions and form a ball groove 18 together, and a circle of balls 5 are arranged in the ball groove 18, so that the left-right displacement of the inner sleeve 4 in the outer sleeve 2 is limited.
As shown in fig. 5, a ratchet groove 22 is formed in the inner sleeve 4, as shown in fig. 6, the ratchet 6 is provided with two layers of ratchet teeth, the ratchet 6 is embedded in the ratchet groove 22, the ratchet teeth of the ratchet 6 are meshed with the ratchet groove 22, and the ratchet groove 22 limits the up-and-down displacement of the ratchet 6. The lower part of the inner sleeve 4 has smaller outer diameter than the upper part, and a circular friction plate 23 is fixedly connected at the bottom. The threaded rod 3 is positioned on the central axis of the inner sleeve 4 and is connected with the central screw hole of the ratchet wheel 6, and the lower end of the threaded rod 3 penetrates out of the central hole 19 at the lower end of the outer sleeve 2.
The energy dissipation mechanism comprises an upper pressing plate 8, a lower pressing plate 11, an upper friction ring 9 and a lower friction ring 10. The upper pressing plate 8 and the upper friction ring 9 are sleeved at the lower part of the inner sleeve 4, and the upper friction ring 9 is positioned between the upper pressing plate 8 and the upper surface of the friction plate 23. The lower pressing plate 11 and the lower friction ring 10 are sleeved on the threaded rod 3, and the lower friction ring 10 is positioned between the lower surface of the friction plate 23 and the lower pressing plate 11. The bottom surface of the lower pressing plate 11 is fixed to the inner wall of the outer sleeve 2 through a plurality of stiffening plates 12 as shown in fig. 12, and specifically, the stiffening plates 12 are fixed to the inner wall of the outer sleeve 2 while being fixed to the bottom surface of the lower pressing plate 11. The upper friction ring 9 and the upper surface of the friction plate 23 form a rotary friction pair, the lower friction ring 10 and the lower surface of the friction plate 23 form a rotary friction pair, and the upper pressure plate 8 and the lower pressure plate 11 are connected by a plurality of bolts 7 as shown in fig. 7 to apply a pre-tightening force.
Specifically, as shown in fig. 9, the inner diameter of the upper friction ring 9 is slightly larger than the outer diameter of the lower portion of the inner sleeve 4, and the outer diameter thereof is equal to the outer diameter of the friction plate 23; as shown in FIG. 8, the inner diameter of the upper pressing plate 8 is equal to the inner diameter of the upper friction ring 9, and the outer diameter of the upper pressing plate is slightly smaller than the inner diameter of the outer sleeve 2 and slightly larger than the outer diameter of the lower part of the inner sleeve 4; as shown in fig. 10, the inner diameter of the lower friction ring 10 is smaller than the inner diameter of the friction plate 23 and larger than the diameter of the threaded rod 3, and the outer diameter of the lower friction ring 10 is equal to the outer diameter of the friction plate 23; as shown in fig. 11, the inner diameter of the lower pressing plate 11 is slightly larger than the diameter of the threaded rod 3, and the outer diameter is slightly smaller than the inner diameter of the outer sleeve 2. The periphery of the upper pressing plate 8 is provided with a plurality of bolt holes 24, the periphery of the lower pressing plate 11 is also provided with a plurality of bolt holes 24, and the bolts 7 pass through the bolt holes 24 of the upper pressing plate 8 and the lower pressing plate 11, so that the upper pressing plate 8, the lower pressing plate 11, the upper friction ring 9, the lower friction ring 10 and the friction plate 23 jointly form an energy consumption mechanism.
The self-resetting mechanism comprises a spring end plate 21, a spring 13 and a inhaul cable connection piece 15. The spring end plate 21 is located in the outer sleeve 2, fixed to the lower portion of the threaded rod 3, and the spring 13 shown in fig. 13 is sleeved on the threaded rod 3 and located between the spring end plate 21 and the lower end of the outer sleeve 2. The steel cable 17 shown in fig. 17 is fixed to the bottom of the cable connector 15 shown in fig. 15 by the anchor head 16 shown in fig. 16, and the cable connector 15 is connected to the bottom end of the threaded rod 3 by the internal thread 20. A rubber washer 14 as shown in fig. 14 is provided between the outer sleeve 2 and the cable connecting piece 15.
As shown in fig. 4, the threaded rod 3 is provided with threads 301 at both ends, the middle portion is smooth, and the diameter of the threaded portion 301 is identical to the diameter of the smooth portion. The ratchet wheel 6 can rotate unidirectionally around the central axis of the inner sleeve 4, and when the threaded rod 3 moves downwards, the ratchet wheel 6 is driven to rotate, and the ratchet wheel 6 rotates to drive the ratchet sleeve 4 to rotate; when the threaded rod 3 is displaced upward, the ratchet 6 does not rotate.
The connecting element 1 as shown in fig. 2 is fixed to the top end of an outer sleeve 2.
The prestress-free self-resetting energy-consumption inhaul cable support disclosed by the invention has the advantages that the prestress-free effect is realized mainly by virtue of the unidirectional rotation characteristic of a ratchet structure: because the thread part is in threaded connection with the central screw hole of the ratchet wheel, when the threaded rod moves downwards in a pulling way, the ratchet wheel and the ratchet wheel sleeve are driven to rotate in a unidirectional way, and then the friction mechanism is started to start rotating friction, so that the energy of the earthquake input structure is dissipated in a friction heat energy mode, and the effects of protecting the support and the structure are realized; when the self-resetting device is unloaded, the ratchet wheel is in no contact with the ratchet wheel sleeve, friction force is not used for blocking, and the support can freely move to the original position under the action of the restoring force of the spring until the self-resetting is completely restored. Specifically, under the small shock condition, the steel inhaul cable is subjected to downward tension, and the tension is transmitted to the threaded rod through the inhaul cable connecting piece. At this time, the threaded rod has a tendency to move downward, and the ratchet sleeve have a tendency to rotate. However, because a large pretightening force is applied between the upper friction ring, the lower friction ring and the friction plate through the bolts, a large friction force is generated to prevent the ratchet sleeve and the ratchet from rotating and the threaded rod from moving downwards. Under this condition, the anchoring end of the cable is equivalent to the fixed end of the cable, so that only the steel cable plays a supporting role to provide rigidity without energy consumption and self-resetting effect.
Under the condition of medium shock or large shock, the pulling force of the steel inhaul cable is continuously increased until the friction force of the friction mechanism is overcome, at the moment, the threaded rod moves downwards, the length of the spring is compressed, the ratchet wheel and the ratchet wheel sleeve rotate, meanwhile, the friction plate, the upper friction ring and the lower friction ring are driven to generate rotary friction, the energy dissipation mechanism of the support is started, and the seismic energy is started to be dissipated.
When the steel inhaul cable is unloaded, the pulling force of the steel inhaul cable is continuously reduced, the spring gradually recovers to be long, meanwhile, the spring end plate is pushed to move upwards with the threaded rod until the steel inhaul cable returns to the initial position, and self-resetting is achieved. In the process, the ratchet teeth of the ratchet wheel can not clamp the ratchet wheel grooves and can not drive the ratchet wheel and the ratchet wheel sleeve to rotate, so that friction force can not be blocked. Based on the above, the spring in the invention does not need to apply prestress, and the problems of prestress maintenance, anchoring and the like are avoided, which is remarkably creative compared with the existing self-resetting support adopting the prestress technology.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (3)
1. The prestress-free self-resetting energy-dissipation inhaul cable support is characterized by comprising an outer sleeve (2), a threaded rod (3), an inner sleeve (4), a ratchet wheel (6), an energy-dissipation mechanism, a self-resetting mechanism and a steel inhaul cable (17);
the inner sleeve (4) and the outer sleeve (2) are coaxially arranged, and a ball (5) is arranged between the inner sleeve and the outer sleeve; a ratchet groove (22) is formed in the inner sleeve (4), and a ratchet (6) is embedded into the ratchet groove (22); the outer diameter of the lower part of the inner sleeve (4) is smaller than that of the upper part, and a circular friction plate (23) is fixedly connected to the bottom of the inner sleeve; the threaded rod (3) is positioned on the central axis of the inner sleeve (4) and is connected with the central screw hole of the ratchet wheel (6), and the lower end of the threaded rod (3) penetrates out of the central hole at the lower end of the outer sleeve (2);
the energy consumption mechanism comprises an upper pressing plate (8), a lower pressing plate (11), an upper friction ring (9) and a lower friction ring (10); the upper pressing plate (8) and the upper friction ring (9) are sleeved at the lower part of the inner sleeve (4), and the upper friction ring (9) is positioned between the upper pressing plate (8) and the upper surface of the friction plate (23); the lower pressing plate (11) and the lower friction ring (10) are sleeved on the threaded rod (3), and the lower friction ring (10) is positioned between the lower surface of the friction plate (23) and the lower pressing plate (11); the bottom surface of the lower pressing plate (11) is fixed with the inner wall of the outer sleeve (2) through a plurality of stiffening plates (12); the upper surfaces of the upper friction ring (9) and the friction plate (23) form a rotary friction pair, the lower surfaces of the lower friction ring (10) and the friction plate (23) form a rotary friction pair, and the upper pressing plate (8) and the lower pressing plate (11) are connected through a plurality of bolts (7) to apply pretightening force;
the self-resetting mechanism comprises a spring end plate (21), a spring (13) and a guy cable connecting piece (15); the spring end plate (21) is fixed at the lower part of the threaded rod (3), and the spring (13) is sleeved on the threaded rod (3) and is positioned between the spring end plate (21) and the lower end of the outer sleeve (2); the steel inhaul cable (17) is fixed at the bottom of the inhaul cable connecting piece (15) through an anchoring end head (16), and the inhaul cable connecting piece (15) is connected with the bottom end of the threaded rod (3) through an internal thread (20);
the ratchet wheel (6) can rotate unidirectionally around the central axis of the inner sleeve (4), and when the threaded rod (3) moves downwards, the ratchet wheel (6) is driven to rotate, and the ratchet wheel (6) rotates to drive the inner sleeve (4) to rotate.
2. The prestress-free self-resetting energy-consuming cable support according to claim 1, wherein the threaded rod (3) is provided with threads (301) at both ends, the middle part is smooth, and the diameter of the threaded rod (301) is identical to the diameter of the smooth part.
3. The prestressing-free self-resetting energy-dissipating cable brace according to claim 1, characterized in that a rubber gasket (14) is arranged between the outer sleeve (2) and the cable connection (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211072683.2A CN115341677B (en) | 2022-09-02 | 2022-09-02 | Prestressed self-resetting energy-dissipation inhaul cable support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211072683.2A CN115341677B (en) | 2022-09-02 | 2022-09-02 | Prestressed self-resetting energy-dissipation inhaul cable support |
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| CN115341677A CN115341677A (en) | 2022-11-15 |
| CN115341677B true CN115341677B (en) | 2023-08-04 |
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| CN202211072683.2A Active CN115341677B (en) | 2022-09-02 | 2022-09-02 | Prestressed self-resetting energy-dissipation inhaul cable support |
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| CN117167201B (en) * | 2023-09-06 | 2024-06-18 | 重庆大学 | Hybrid wind power tower system |
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| CN215717662U (en) * | 2021-08-17 | 2022-02-01 | 西安建筑科技大学 | Rotary self-resetting viscous energy dissipation support |
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2022
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| JP2011012785A (en) * | 2009-07-03 | 2011-01-20 | Kyb Co Ltd | Suspension device |
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