WO2022141728A1

WO2022141728A1 - Multi-material composite rolling seismic isolation device

Info

Publication number: WO2022141728A1
Application number: PCT/CN2021/074321
Authority: WO
Inventors: 程丽华; 田中山; 孙建刚; 赖少川; 李想; 杨文�; 刘宝良
Original assignee: 广东石油化工学院
Priority date: 2020-12-29
Filing date: 2021-01-29
Publication date: 2022-07-07
Also published as: CN112727976A

Abstract

A multi-material composite rolling seismic isolation device, comprising a first base plate (100) which is a horizontal plate. A rolling portion comprises a first rolling recess (200), steel balls (300) and a second rolling recess (400), wherein arc-shaped recess openings of the first rolling recess (200) and the second rolling recess (400) are arranged in opposite directions, and a rolling space allowing the steel balls (300) to roll therein is formed between the first rolling recess and the second rolling recess; an SMA wire layer (500) is wound around and covers the outside of the first rolling recess (200) and the second rolling recess (400); a second base plate (600) has the same shape as the first base plate (100), and the two are respectively correspondingly fixed to the bottom of the second rolling recess (400) and the top of the first rolling recess (200); rubber pads (700) are fixed between the second base plate (600) and the second rolling recess (400) and between the first base plate (100) and the first rolling recess (200); and two ends, located outside the rolling space, of the first base plate (100) and the second base plate (600) are respectively connected by means of four rubber columns (800). Multiple materials are combined, and the device has an instantaneous reset function; and the device can achieve the aims of supporting an upper structure and isolating the upper structure from the effects of an earthquake, thereby reducing the damage of a destructive earthquake to an LNG storage tank. The structure is simple, the materials can be obtained easily, and the manufacturing cost is reduced.

Description

A multi-material composite rolling vibration isolation device

technical field

The invention relates to the technical field of vibration isolation devices, and more particularly to a multi-material composite rolling vibration isolation device.

Background technique

At present, the research on the basic vibration isolation device applied to LNG storage tanks at home and abroad mainly focuses on the rubber pad vibration isolation device, which is used to reduce the base shear force and overturning moment, and reduce the dynamic hydraulic pressure. However, the vibration isolation device in the prior art generally As a single isolation device, the isolation effect is poor.

Therefore, how to provide a multi-material composite rolling vibration isolation device is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

Therefore, the purpose of the present invention is to provide a multi-material composite rolling vibration isolation device to improve the vibration isolation effect.

The invention provides a multi-material composite rolling vibration isolation device, comprising:

the first pad, the first pad is a horizontal plate;

The rolling part includes: a first rolling groove, a steel ball and a second rolling groove, the first rolling groove and the second rolling groove are oppositely arranged in the direction of arc-shaped notches, and a rolling space for the rolling of the steel ball is formed inside;

SMA wire layer, the first rolling groove and the second rolling groove are wrapped with SMA wire layer;

the second backing plate, the second backing plate has the same shape as the first backing plate, and the two are respectively fixed on the bottom of the second rolling groove and the top of the first rolling groove;

rubber pads, rubber pads are fixed between the second pad and the second rolling groove, and between the first pad and the first rolling groove;

and rubber columns, the two ends of the first pad and the second pad located outside the rolling space are respectively connected by four rubber columns.

It can be seen from the above technical solutions that, compared with the prior art, the present disclosure provides a multi-material composite rolling vibration isolation device, which is composed of a variety of materials and has an instantaneous reset function, which can not only serve the purpose of supporting the upper structure, but also support the upper structure. It can achieve the purpose of isolating the input of earthquakes to the upper structure and reduce the damage of destructive earthquakes to the LNG storage tank. Therefore, through the material characteristics, the effect of variable stiffness and large displacement isolation is achieved, thereby improving the stability of the device and increasing the reduction of the device. The seismic energy dissipation capacity is simple, the structure is simple, the material is easy to obtain, the installation and construction are simple, and the cost of the seismic isolation device is reduced.

Further, it also includes two mild steel rings, each of which is a semi-circular arc structure, which is enclosed on the outside of the rubber column, and its two ends are respectively connected to one end of the first backing plate and the one end of the second backing plate. Auxiliary stiffness is thus provided by the mild steel rings on both sides with a radius of 60-120mm.

Further, when the upper structure is automatically large, it also includes at least one middle rolling groove, and the top and bottom of the middle rolling groove are respectively provided with rolling grooves with the same curvature as the first rolling groove and the second rolling groove.

Further, the number of fixed grooves corresponding to the top and bottom of the first rolling groove, the second rolling groove and the middle rolling groove matched with them are all nine, and the diameters of the steel balls in the multiple rolling spaces formed by each other are the same.

Further, a fixing block is arranged on the inner side of the first backing plate and the second backing plate opposite to the rubber column, and the fixing block is provided with a fixing hole for fixing the rubber column.

Further, the thicknesses of the second backing plate 600 and the first backing plate 100 are both 10-15 mm.

Further, the radius of the arc notch of the first rolling groove 200 and the second rolling groove 400 is 60-100 mm.

Further, the cross section of the rubber column 800 is a square, and the side length thereof is 8-15 mm.

Further, the diameter of the SMA wire corresponding to the SMA wire layer 500 is 0.4-0.8 mm.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a schematic structural diagram of an embodiment with a large upper self-gravity of a multi-material composite rolling vibration isolation device provided by the present invention;

FIG. 2 shows a schematic cross-sectional view of FIG. 1 in a top-down direction;

Figure 3 is a schematic structural diagram of an embodiment with a small upper self-gravity of a multi-material composite rolling vibration isolator provided by the present invention;

FIG. 4 is a schematic cross-sectional view of FIG. 3 in a top-down direction;

In the picture: 100-first backing plate, 101-fixing block, 200-first rolling groove, 300-steel ball, 400-second rolling groove, 500-SMA wire layer, 600-second backing plate, 700-rubber Pad, 800 - Rubber Post, 801 - Mild Steel Ring, 900 - Middle Roll Groove.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed, and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The invention can form single-rigidity multi-material composite rolling seismic isolation devices and variable-stiffness multi-material composite rolling seismic isolation devices with different internal structures according to the self-weight of the upper structure of the seismic isolation device and the seismic fortification level of the area where the structure is located.

Referring to Figures 1 and 2, in view of the dead weight of the upper structure of the seismic isolation device and the application of the high seismic fortification level in the area where the structure is located, the embodiment of the present invention discloses a multi-material composite rolling seismic isolation device with variable stiffness, comprising: : the first backing plate 100, the first backing plate 100 is a horizontal plate; the rolling part, the rolling part includes: the first rolling groove 200, the steel ball 300 and the second rolling groove 400, the first rolling groove 200 and the second rolling groove 400 The arc-shaped grooves are arranged in opposite directions, and a rolling space for the rolling of the steel ball 300 is formed inside; the SMA wire layer 500, the first rolling groove 200 and the second rolling groove 400 are wrapped with an SMA wire layer 500 on the outside; the second backing plate 600, the second backing plate 600 has the same shape as the first backing plate 100, and they are respectively fixed to the bottom of the second rolling groove 400 and the top of the first rolling groove 200; the rubber pad 700, the second backing plate 600 and the second rolling groove 400, between the first backing plate 100 and the first rolling groove 200, a rubber pad 700 is fixed; and the rubber column 800, the two ends of the first backing plate 100 and the second backing plate 600 outside the rolling space pass through four holes respectively. A rubber column 800 is connected. It also includes two middle-layer rolling grooves 900 . The top and bottom of the middle-layer rolling grooves 900 are respectively provided with rolling grooves with the same curvature as the first rolling grooves 200 and the second rolling grooves 400 . The number of fixed grooves corresponding to the top and bottom of the first rolling groove 200, the second rolling groove 400 and the matching middle rolling groove 900 is nine, which reduces the concentrated force of the steel balls on the rolling groove section, and forms multiple rolling spaces. The inner steel balls 300 have the same diameter.

Advantageously, in the above-mentioned embodiment, two mild steel rings 801 are also included, each of which is a semi-circular arc structure, which is enclosed on the outside of the rubber column 800, and its two ends are respectively connected to the first pad One end of the plate 100 and the second backing plate 600 . A fixing block 101 is provided on the inner side of the first backing plate 100 and the second backing plate 600 opposite to the rubber column 800 , and the fixing block 101 is provided with a fixing hole for fixing the rubber column 800 . The thicknesses of the second backing plate 600 and the first backing plate 100 are both 10-15 mm. The radius of the arc-shaped notch of the first rolling groove 200 and the second rolling groove 400 is 60-100 mm. The cross section of the rubber column 800 is square, and its side length is 8-15mm. The diameter of the SMA wire corresponding to the SMA wire layer 500 is 0.4-0.8 mm.

Therefore, in this embodiment provided by the present invention, the seismic isolation device is installed on the pile foundation of the LNG storage tank during use. When an earthquake occurs, a lateral force is generated due to the inertial force, which pushes the steel ball to roll to generate displacement, and passes through The deformation of the rubber column and the mild steel provides restoring stiffness to achieve the purpose of absorbing seismic energy; and using the restoring force and anti-fatigue properties generated by the superelastic properties of the SMA wire, the vibration isolation device absorbs energy and quickly resets, while the SMA wire is wrapped around the rolling surface. Outside the space to prevent debris from entering the rolling space. By increasing the number of intermediate rolling groove layers and the number of steel balls, the purpose of changing the isolation stiffness can be achieved to meet the requirements of different sites. Based on the different properties of rolling vibration isolation, rubber column, SMA wire and mild steel ring, they are optimally combined to form a multi-material composite rolling vibration isolation device, so as to achieve a safer, more reliable, more practical, more durable and more economical structure. this goal.

Referring to Figures 3 and 4, for applications where the self-weight of the upper structure of the seismic isolation device is small and the seismic fortification level of the region where the structure is located is low, the embodiment of the present invention discloses a multi-material composite rolling seismic isolation device with variable stiffness, comprising: : the first backing plate 100, the first backing plate 100 is a horizontal plate; the rolling part, the rolling part includes: the first rolling groove 200, the steel ball 300 and the second rolling groove 400, the first rolling groove 200 and the second rolling groove 400 The arc-shaped grooves are arranged in opposite directions, and a rolling space for the rolling of the steel ball 300 is formed inside; the SMA wire layer 500, the first rolling groove 200 and the second rolling groove 400 are wrapped with an SMA wire layer 500 on the outside; the second backing plate 600, the second backing plate 600 has the same shape as the first backing plate 100, and they are respectively fixed to the bottom of the second rolling groove 400 and the top of the first rolling groove 200; the rubber pad 700, the second backing plate 600 and the second rolling groove Rubber pads 700 are fixed between the first pad 100 and the first rolling groove 200 between 400 and 400; A rubber column 800 is connected. The number of fixed grooves corresponding to the first rolling groove 200 and the second rolling groove 400 is one.

Advantageously, in the above-mentioned embodiment, two mild steel rings 801 are also included, each of which is a semi-circular arc structure, which is enclosed on the outside of the rubber column 800, and its two ends are respectively connected to the first pad One end of the plate 100 and the second backing plate 600 . A fixing block 101 is provided on the inner side of the first backing plate 100 and the second backing plate 600 opposite to the rubber column 800 , and the fixing block 101 is provided with a fixing hole for fixing the rubber column 800 . The thicknesses of the second backing plate 600 and the first backing plate 100 are both 10-15 mm. The radius of the arc notch of the first rolling groove 200 and the second rolling groove 400 is 60-100 mm. The cross section of the rubber column 800 is square, and its side length is 8-15mm. The diameter of the SMA wire corresponding to the SMA wire layer 500 is 0.4-0.8 mm.

In this embodiment, a single-rigidity multi-material composite rolling seismic isolation device is formed through the above structure, which satisfies the application where the self-weight of the upper structure of the seismic isolation device is small and the seismic fortification level of the area where the structure is located is low.

In the above two embodiments, after the rolling groove is relatively fixed, the SMA wire is wound around the rolling groove, and the winding can be stopped when the SMA wire completely covers the outer pores of the first rolling groove, the second rolling groove and the middle rolling groove.

In the present invention, the rubber rod and the soft steel ring are not connected to each other. In addition to the joint energy consumption and shock absorption, there is another purpose in that one is damaged and the other is still functioning.

The radii of the rolling grooves mentioned above are set according to the different types of sites where the structure is located, and different isolation periods are set to select the radius of the rolling grooves.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims

A multi-material composite rolling vibration isolation device, characterized in that it includes:

a first backing plate (100), the first backing plate (100) is a horizontal plate;

A rolling part, the rolling part comprises: a first rolling groove (200), a steel ball (300) and a second rolling groove (400), the first rolling groove (200) and the second rolling groove (400) The arc-shaped notches are arranged in opposite directions, and a rolling space for the steel ball (300) to roll is formed inside;

an SMA wire layer (500), the first rolling groove (200) and the second rolling groove (400) are wound and covered with the SMA wire layer (500);

A second backing plate (600), the second backing plate (600) has the same shape as the first backing plate (100), and they are respectively fixed on the bottom of the second rolling groove (400) and the first backing plate (100). a top of the rolling groove (200);

A rubber pad (700), between the second pad (600) and the second rolling groove (400), and between the first pad (100) and the first rolling groove (200) the rubber pad (700) is fixed;

and a rubber column (800), two ends of the first backing plate (100) and the second backing plate (600) located outside the rolling space are respectively connected by four rubber columns (800).
The multi-material composite rolling vibration isolation device according to claim 1, further comprising two mild steel rings (801), each of which is a semi-circular arc structure, which encloses It is located outside the rubber column (800), and its two ends are respectively connected to one end of the first backing plate (100) and one end of the second backing plate (600).
The multi-material composite rolling vibration isolation device according to claim 1, further comprising at least one middle-layer rolling groove (900), wherein the top and bottom of the middle-layer rolling groove (900) are respectively provided with A rolling groove (200) and a rolling groove with the same curvature as the second rolling groove (400).
The multi-material composite rolling vibration isolation device according to claim 3, characterized in that, the first rolling groove (200), the second rolling groove (400) and the middle-layer rolling groove ( 900) The number of fixed grooves corresponding to the top and the bottom are both nine, and the diameters of the steel balls (300) in the multiple rolling spaces formed by each other are all the same.
The multi-material composite rolling vibration isolation device according to claim 1, wherein the inner side of the first backing plate (100) and the second backing plate (600) are opposite to the rubber column (800) Each is provided with a fixing block (101), and the fixing block (101) is provided with a fixing hole for fixing the rubber column (800).
The multi-material composite rolling vibration isolation device according to any one of claims 1-5, wherein the thickness of the second backing plate (600) and the first backing plate (100) are both 10- 15mm.
The multi-material composite rolling vibration isolation device according to claim 6, characterized in that the radius of the arc-shaped notch of the first rolling groove (200) and the second rolling groove (400) is 60-100 mm .
The multi-material composite rolling vibration isolation device according to claim 6, characterized in that the rubber column (800) has a square cross-section and a side length of 8-15 mm.
The multi-material composite rolling vibration isolation device according to claim 6, wherein the diameter of the SMA wire corresponding to the SMA wire layer (500) is 0.4-0.8 mm.