CN114753240A - Novel magnetic control semi-active friction type self-resetting shock insulation support - Google Patents
Novel magnetic control semi-active friction type self-resetting shock insulation support Download PDFInfo
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- CN114753240A CN114753240A CN202210269556.5A CN202210269556A CN114753240A CN 114753240 A CN114753240 A CN 114753240A CN 202210269556 A CN202210269556 A CN 202210269556A CN 114753240 A CN114753240 A CN 114753240A
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- connecting body
- friction block
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- bearing cavity
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- 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
Abstract
The invention discloses a novel magnetic control semi-active friction type self-resetting seismic isolation support. The traditional rubber shock insulation support has the problems of vertical compressive strength and weak tensile strength, and the shock insulation effect is influenced. The invention comprises an upper connector, the lower end of which is connected with a high-strength bearing cavity; the high-strength bearing cavity is connected with the friction block in a penetrating mode to form a cavity body with a hollow interior, and an excitation coil connected with an external voltage control device is arranged in the cavity body; the friction block is connected with the lower connecting body in a sliding way; the lower connecting body is connected with an anti-overturning steel frame, and the high-strength bearing cavity and the friction block are arranged inside the anti-overturning steel frame; and a plurality of SMA wires which are pre-applied with the same pre-tensioning strain are arranged between the upper connecting body and the lower connecting body. The invention changes the positive pressure between the friction block and the contact surface by controlling the voltage to change the size of the magnetic field, thereby changing the friction force to make the friction block self-adaptive to the earthquake force and achieving the purpose of consuming earthquake energy.
Description
Technical Field
The invention belongs to the technical field of disaster prevention and reduction, and particularly relates to a novel magnetic control semi-active friction type self-resetting seismic isolation support.
Background
With the rapid promotion of global industrialization, seismic isolation and reduction technology is also greatly developed. The application of elements such as vibration isolation support dampers and the like on structures such as bridges, buildings and the like is increased more and more, and the traditional anti-seismic design concept of resisting the earthquake action through the structure is broken. At present, rubber vibration isolation supports are widely applied as energy dissipation elements. However, the traditional rubber shock insulation support has the problems of vertical compressive strength, weak tensile strength, rubber aging and the like, so that the whole shock insulation effect is influenced. In addition, the rubber shock insulation support belongs to the passive energy consumption category, and small shocks often cannot play a role, and medium and large shocks cannot fully consume seismic energy. With the semi-active control and the active control, a great result is obtained, and a new direction is provided for the structural shock isolation.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a novel magnetic control semi-active friction type self-resetting seismic isolation support.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
A novel magnetic control semi-active friction type self-resetting seismic isolation support comprises an upper connector, wherein the lower end of the upper connector is fixedly connected with a high-strength bearing cavity; the high-strength bearing cavity is fixedly connected with the friction block in a penetrating mode to form a cavity with a hollow interior, an excitation coil is arranged in the cavity, and the excitation coil is connected with an external voltage control device;
the friction block is arranged on the lower connecting body and is in sliding connection with the lower connecting body;
an anti-overturning steel frame is fixedly connected to the lower connecting body, the anti-overturning steel frame is a cylinder with a hollow interior, the high-strength bearing cavity and the friction block are arranged inside the anti-overturning steel frame, and a gap is formed between the anti-overturning steel frame and the upper surface of the high-strength bearing cavity;
a plurality of SMA wires are uniformly arranged between the upper connecting body and the lower connecting body, two ends of the SMA wires are respectively in anchoring connection with the upper connecting body and the lower connecting body, and the SMA wires apply the same pre-tensioning strain in advance.
Specifically, the lower end of the upper connecting body is connected with the high-strength pressure-bearing cavity in a welding manner;
specifically, a wire guide hole is formed in the high-strength pressure-bearing cavity.
The invention has the beneficial effects that:
1) the invention utilizes an external voltage control device to change the size of a magnetic field generated by a coil by controlling the size of voltage so as to change the positive pressure between a friction block and a contact surface, thereby changing the friction force of the friction block, enabling the friction block to be adaptive to seismic force and finally achieving the purpose of effectively consuming seismic energy;
2) The anti-overturning steel frame is arranged in the anti-overturning device, so that the whole device can be prevented from overturning, a limiting effect can be achieved, and the working safety and stability of the whole device are improved;
3) the novel intelligent SMA wire is adopted, so that the whole device can realize automatic reset after the earthquake is finished.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a sectional view taken along line A-A;
in the figure, 1-an upper connector, 2-a lower connector, 3-an anti-overturning steel frame, 4-a high-strength bearing cavity, 5-an excitation coil, 6-a friction block and 7-SMA wire.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
As shown in fig. 1 and 2, the invention comprises an upper connector 1, wherein the upper connector 1 is in a two-section stepped cylindrical shape, and the diameter of the upper end is larger than that of the lower end; the lower end of the upper connector 1 is welded with the high-strength bearing cavity 4; the high-strength bearing cavity 4 is a cylinder with a hollow interior, and a wire hole is formed in the high-strength bearing cavity 4.
The high-strength bearing cavity 4 is fixedly connected with the friction block 6 in a penetrating manner to form a cavity body with a hollow interior, and the magnet exciting coil 5 is arranged in the cavity body; the excitation coil 5 is connected with an external voltage control device through a wire hole on the high-strength bearing cavity 4;
The friction block 6 is arranged on the lower connecting body 2, and the friction block 6 is connected with the lower connecting body 2 in a sliding manner; a system consisting of the upper connector 1, the high-strength bearing cavity 4 and the friction block 6 can slide on the lower connector 2 in a friction manner;
an anti-overturning steel frame 3 is welded and connected to the lower connecting body 2, the anti-overturning steel frame 3 is a cylinder with a hollow interior, the high-strength pressure-bearing cavity 4 and the friction block 6 are arranged inside the anti-overturning steel frame 3, and a gap is formed between the upper surfaces of the anti-overturning steel frame 3 and the high-strength pressure-bearing cavity 4; the anti-overturning steel frame 3 can prevent the whole device from overturning and play a limiting role, so that the working safety and stability of the whole device are improved;
4 SMA wires 7 are uniformly arranged between the upper connector 1 and the lower connector 2, two ends of each SMA wire 7 are respectively in anchoring connection with the upper connector 1 and the lower connector 2, and the SMA wires 7 apply the same pre-tensioning strain in advance; the SMA wire is a shape memory alloy, is a novel intelligent material, has excellent shape memory effect and super-elastic effect, and can automatically recover after deformation.
The working principle of the invention is as follows:
the upper connection body 1 and the lower connection body 2 are connected to a building. When an earthquake occurs, a system consisting of the upper connector 1, the high-strength pressure bearing cavity 4 and the friction block 6 can rub on the lower connector 2 to slide, and an external voltage control device is utilized to change the size of a magnetic field generated by the excitation coil 5 by controlling the size of voltage so as to change the positive pressure between the friction block 6 and a contact surface, thereby changing the friction force of the friction block, enabling the friction block to be adaptive to the earthquake force and finally achieving the purpose of effectively consuming earthquake energy. After the earthquake is finished, the SMA wire 7 can provide reset.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (3)
1. A novel magnetic control semi-active friction type self-resetting seismic isolation support is characterized in that: the high-strength pressure-bearing device comprises an upper connector (1), wherein the lower end of the upper connector (1) is fixedly connected with a high-strength pressure-bearing cavity (4); the high-strength bearing cavity (4) is fixedly connected with the friction block (6) in a penetrating mode to form a cavity with a hollow interior, the interior of the cavity is provided with an excitation coil (5), and the excitation coil (5) is connected with an external voltage control device;
The friction block (6) is arranged on the lower connecting body (2), and the friction block (6) is connected with the lower connecting body (2) in a sliding manner;
an anti-overturning steel frame (3) is fixedly connected to the lower connecting body (2), the anti-overturning steel frame (3) is a cylinder with a hollow inner part, the high-strength bearing cavity (4) and the friction block (6) are arranged in the anti-overturning steel frame (3), and a gap is formed between the anti-overturning steel frame (3) and the upper surface of the high-strength bearing cavity (4);
a plurality of SMA wires (7) are uniformly arranged between the upper connecting body (1) and the lower connecting body (2), two ends of each SMA wire (7) are respectively in anchoring connection with the upper connecting body (1) and the lower connecting body (2), and the SMA wires (7) apply the same pre-tensioning strain in advance.
2. The novel magnetic control semi-active friction type self-resetting seismic isolation bearing according to claim 1, characterized in that: the lower end of the upper connecting body (1) is connected with the high-strength pressure-bearing cavity (4) in a welding mode.
3. The novel magnetic control semi-active friction type self-resetting seismic isolation bearing according to claim 2, characterized in that: and the high-strength pressure-bearing cavity (4) is provided with a wire guide hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210269556.5A CN114753240A (en) | 2022-03-18 | 2022-03-18 | Novel magnetic control semi-active friction type self-resetting shock insulation support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210269556.5A CN114753240A (en) | 2022-03-18 | 2022-03-18 | Novel magnetic control semi-active friction type self-resetting shock insulation support |
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| Publication Number | Publication Date |
|---|---|
| CN114753240A true CN114753240A (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210269556.5A Pending CN114753240A (en) | 2022-03-18 | 2022-03-18 | Novel magnetic control semi-active friction type self-resetting shock insulation support |
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| CN (1) | CN114753240A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207633204U (en) * | 2017-12-04 | 2018-07-20 | 西京学院 | A kind of half active Self-resetting sliding isolated bearing of magnetic control |
| CN208280362U (en) * | 2018-05-28 | 2018-12-25 | 西京学院 | A kind of half active friction energy-consumption damper of GMM |
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN211257991U (en) * | 2019-11-07 | 2020-08-14 | 李国豪 | Magnetic control semi-active mass coordination friction type damper |
-
2022
- 2022-03-18 CN CN202210269556.5A patent/CN114753240A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN207633204U (en) * | 2017-12-04 | 2018-07-20 | 西京学院 | A kind of half active Self-resetting sliding isolated bearing of magnetic control |
| CN208280362U (en) * | 2018-05-28 | 2018-12-25 | 西京学院 | A kind of half active friction energy-consumption damper of GMM |
| CN211257991U (en) * | 2019-11-07 | 2020-08-14 | 李国豪 | Magnetic control semi-active mass coordination friction type damper |
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