CN201560507U - A Composite Tensile Laminated Rubber Seismic Isolation Bearing - Google Patents

Abstract

The utility model relates to a composite tensile laminated rubber vibration isolation support. The support comprises an upper connecting plate (2), a lower connecting plate (3) and a laminated rubber elastic body (1) clamped between the upper and lower connecting plates and is characterized in that the inside of the laminated rubber elastic body (1) around a vertical center line thereof is uniformly provided with a plurality of cylindrical holes (10) in parallel with the center line; an upper sealing plate (1-4) and a lower sealing plate (1-5) of the laminated rubber elastic body (1) at both ends of each cylindrical hole (10) are respectively provided with a through hole; the inside of each cylindrical hole (10) is provided with a cylindrical helical spring (4) and is filled with elastic rubber cement (12); a steel wire for winding a helical body (4-1) of each cylindrical helical spring (4) respectively extends toward two ends and passes through the through hole to be respectively fixedly connected with the upper connecting plate (2) and the lower connecting plate (3); the inside of each through hole is respectively provided with a sealing ring (11) matched with the corresponding steel wire for winding the helical body (4-1) of the cylindrical helical spring (4); and the elastic rubber cement (12) is methyl silicone rubber or methyl phenyl vinyl silicone rubber.

Description

A Composite Tensile Laminated Rubber Seismic Isolation Bearing

technical field

The utility model relates to an anti-seismic (or vibration) building component, in particular to a laminated rubber shock-isolation bearing.

Background technique

The laminated rubber shock-isolation bearing is a two-dimensional shock-isolation component commonly used in anti-vibration engineering. The component is mainly composed of alternate laminated layers of rubber and steel plates molded and vulcanized between the upper and lower connecting plates. This kind of laminated rubber seismic isolation bearing can not only bear constant loads such as buildings, but also has good horizontal deformation capacity and damping energy dissipation capacity, so it can effectively isolate buildings from the horizontal action of earthquakes. However, the tensile strength of the existing laminated rubber seismic isolation bearings is relatively poor, and it is difficult to meet the seismic isolation requirements of high-rise buildings, because the earthquake itself has multi-dimensional characteristics, especially in high-intensity areas of earthquakes, it is easy to cause high-rise Buildings sway or even overturn, requiring seismic isolation bearings to withstand huge tensile forces. Before the tensile stress reaches a certain value, the support is elastic, and if it exceeds this value, it will be yielded. After passing the yield point, although there is no damage on the appearance, many holes will be generated inside due to the tensile deformation, which is serious. When the rubber layer breaks or the rubber/steel plate interface bond failure occurs.

On August 29, 2007, the State Intellectual Property Bureau authorized and announced the utility model patent of "a laminated rubber shock-isolating bearing with tensile effect" (the authorized announcement number is CN200940296). At least three flexible tensile members are evenly distributed circularly around the symmetrical center line. The middle part of the flexible tensile member is bent and placed in the center hole of the rubber pad, and the two ends are fixed on the upper and lower ends of the rubber pad. The stretching length is not greater than the tensile elastic deformation of the rubber pad. Although the above-mentioned utility model scheme can not only improve the anti-swaying or even overturning ability of high-rise buildings, but also can effectively protect the overall structure of the rubber pad and the shock-isolation bearing from being damaged, but because the flexible tensile member is a steel wire rope, Therefore obviously there are the following deficiencies: 1, the tensile elastic deformation of the steel wire rope is extremely small, and the damping energy dissipation effect cannot be produced when the building is thrown up or made to sway by an earthquake; It is difficult to control the degree of tightness. If it is tight, it will affect the shear deformation of the rubber pad. If it is loose, it will lose its protective effect on the rubber pad when it is pulled; 3. Since the initial steel wire rope under tension can freely extend the length, the early stiffness of the entire support is It is determined by the physical properties of the laminated rubber material, so it is impossible to preset the early stiffness of the bearing according to actual needs, and it is obviously impossible to control the wind load response of the building and resist micro-vibration; 4. When the displacement of the building When it is not within the tensile elastic deformation range of the steel wire rope, it is impossible to provide additional tension for the reset of the building. Therefore, when the mass of the building is large, only the stiffness of the rubber pad itself can make the building completely reset; 5. The steel wire rope is set in In the center hole of the rubber pad, when the support is pulled on one side (such as when the building is overturned), the laminated rubber on the tensioned side cannot be protected, and the laminated rubber on the tensioned side of the support is still torn risk of cracking.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to further improve the compression and shear damping energy dissipation effect and the tensile damage resistance of the laminated rubber shock-isolating bearing.

The technical solution that the utility model solves the problems of the technologies described above is:

A composite tension-resistant laminated rubber shock-isolation bearing, the bearing includes an upper connecting plate, a lower connecting plate and a laminated rubber elastic body clamped between the upper and lower connecting plates, and is characterized in that,

The body of the laminated rubber elastic body is evenly distributed around its vertical center line with several cylindrical holes parallel to the center line, and the upper sealing plate and the lower sealing plate of the laminated rubber elastic body at both ends of each cylindrical hole are respectively provided with a through hole; each

A cylindrical helical spring is provided in the cylindrical hole and filled with elastic cement, wherein the steel wires of the helical body wound around the cylindrical helical spring extend to both ends respectively, and are fixedly connected with the upper connecting plate and the lower connecting plate respectively after passing through the through hole. The elastic cement mentioned above is methyl silicone rubber or methyl vinyl phenyl silicone rubber; each

Sealing rings matching the steel wires of the helical body of the cylindrical helical spring are respectively arranged in the through holes.

In the shock-isolation bearing described in the utility model, step holes are respectively provided on the upper connecting plate and the lower connecting plate opposite to the through holes, and the two ends of the steel wires of the spiral body of the cylindrical helical spring extend to the step holes respectively. A radially expanding T-shaped head is respectively arranged on the inside and the ends, and the T-shaped head is welded integrally with the inner wall of the stepped hole respectively. The fixed connection structure between the steel wire of the helical body of the cylindrical helical spring and the upper connecting plate and the lower connecting plate can significantly improve the reliability of the connection between the two.

In the shock-isolation bearing described in the utility model, the T-shaped head located in the ladder hole on the lower connecting plate is formed by the radial expansion of the steel wire head of the spiral body of the cylindrical helical spring, and the ladder located on the upper connecting plate The T-shaped head in the hole is formed by threading and fixing a countersunk round nut on the steel wire head of the coiled cylindrical helical spring. The above improvement scheme not only facilitates the installation of the cylindrical coil spring, but also can adjust the pre-tension length of the cylindrical coil spring through the countersunk head round nut, thereby making it more convenient to adjust the early tensile stiffness of the entire support.

In order to improve the early stiffness, to control the wind load response of the building and resist the micro-vibration of the foundation, several lead rods can be added in the laminated rubber elastic body of the composite tensile laminated rubber shock-isolation bearing described in the utility model. The rods vertically traverse the laminated rubber elastic body and are evenly distributed around the vertical centerline of the laminated rubber elastic body. When the described lead rod is one, it is arranged at the center of the laminated rubber elastic body.

According to the chemical and physical properties of elastic mastic, its damping energy dissipation effect is not only related to its viscoelasticity and compressibility, but also its flow velocity is also an important factor. Therefore, it is advisable to control the difference between the inner diameter of the cylindrical hole described in the present invention and the outer diameter of the cylindrical helical spring at 3-5 mm.

The composite tension-resistant laminated rubber shock-isolation bearing described in the utility model can be circular or rectangular, that is, when the laminated rubber elastic body is cylindrical, the upper and lower connecting plates can be circular steel plates, It can also be a square steel plate; when the laminated rubber elastic body is a square, the upper and lower connecting plates are a square steel plate.

Since the composite tension-resistant laminated rubber shock-isolating bearing described in the utility model is formed by adding a cylindrical helical spring in the laminated rubber elastic body on the basis of the common laminated rubber shock-isolating bearing and injecting elastic cement, it will be used when an earthquake occurs. When the seismic isolation bearing is subjected to shear or/and compression deformation, the cylindrical coil spring in the cylindrical hole must be elongated or shortened to absorb energy, and at the same time, the elastic cement in the cylindrical hole will also produce corresponding shape changes and volume changes. And absorb the energy produced by external force. In addition, in the above process, the helical body of the cylindrical coil spring forces the elastic mastic to flow at a high speed in the cylindrical hole in the laminated rubber elastic body, converting a part of the external force into heat energy and dissipating it. It can be seen from the above analysis that under the combined action of the cylindrical coil spring and the elastic cement, the seismic isolation bearing described in the utility model not only improves the damping energy dissipation effect, but also significantly improves the shear tensile strength, especially for buildings in earthquakes. When horizontal or/and settlement displacement occurs, the rigidity and elasticity of the cylindrical helical spring provide additional tension for the restoration of the building. In addition, the utility model also has the following outstanding advantages and significant effects compared with the prior art: 1. The elastic deformation of the cylindrical helical spring is far greater than that of the laminated rubber elastic body, and its tension and deformation are linearly changed. There are no other uncertain factors, so the design calculation is convenient and it is easy to make the theoretical calculation consistent with the actual effect; 2. The preset tensile stress can be adjusted by adjusting the pretension degree of the cylindrical coil spring, so as to achieve the preset early stage of the entire support. The purpose of tensile stiffness; 3. The cylindrical helical spring has good rigidity and elasticity. When the support is destructively stretched, the cylindrical helical spring enters the stretching working state, providing additional tensile force for the support. The laminated rubber elastomer in the middle can be effectively protected.

Description of drawings

Figures 1 to 4 are structural schematic diagrams of a specific embodiment of the composite tensile laminated rubber shock-isolation bearing described in the present invention, wherein Figure 1 is the main view (A-A section of Figure 2), and Figure 2 is a top view, Fig. 3 is a B-B sectional view of Fig. 1, and Fig. 4 is an enlarged view of the connection structure between the cylindrical helical spring and the upper connecting plate or the lower connecting plate in Fig. 1 .

Figures 5 and 6 are structural schematic diagrams of another specific embodiment of the composite tensile laminated rubber shock-isolation bearing of the present invention, wherein Figure 5 is the front view, and Figure 6 is the C-C sectional view of Figure 5 .

7 to 9 are structural schematic diagrams of yet another specific embodiment of the composite tensile laminated rubber shock-isolation bearing described in the present invention, wherein, FIG. 7 is the main view, FIG. 8 is the top view, and FIG. 9 is D-D of FIG. 7 Sectional view.

Fig. 10 is a cross-sectional schematic diagram of another specific embodiment of the composite tension-resistant laminated rubber shock-isolation bearing of the present invention.

Figures 11a to 11c are the working states of the cylindrical hole and the cylindrical helical spring and elastic cement in the composite tensile laminated rubber shock-isolating bearing described in the utility model under various stress states, among which, Figure 11a is a shearing state, Figure 11b is the compressed state, and Figure 11c is the stretched state.

Detailed ways

The utility model is further described in detail below in conjunction with the accompanying drawings, so that the public can better grasp the implementation means of the utility model and fully understand the beneficial effects of the utility model, but the utility model is not limited by the embodiments.

Referring to Figures 1-3, the laminated rubber elastic 1 is composed of a layer of rubber 1-1 and a steel plate 1-2 alternately stacked and then molded and vulcanized. During the process of molding and vulcanized, a rubber protective layer 1-3 is naturally formed around it; The upper sealing plate 1-4 and the lower sealing plate 1-5 at the upper and lower ends of the laminated rubber elastic 1 are thicker than the steel plate 1-2 in the middle, and the whole laminated rubber elastic 1 It is fixed in the middle of the upper connecting plate 2 and the lower connecting plate 3. The center of the laminated rubber elastic 1 is provided with a central hole 5, and cylindrical holes 10 with a circular cross section are evenly distributed around the axis of the central hole 5, and the upper sealing plate of the laminated rubber elastic body 1 at both ends of each cylindrical hole 10 1-4 and the lower sealing plate 1-5 are respectively provided with a through hole, and the upper connecting plate 2 and the lower connecting plate 3 opposite thereto are respectively provided with stepped holes 6 . Each cylindrical hole 10 is provided with a cylindrical coil spring 4 filled with elastic mastic 12 made of methyl vinyl phenyl silicone rubber. An O-shaped sealing ring 11 is provided in each through hole set on the upper sealing plate 1-4 and the lower sealing plate 1-5, and the steel wires at the two ends of the spiral body 4-1 of the cylindrical coil spring 4 extend to the two ends respectively, and pass through The central hole of the O-shaped sealing ring 11 extends into the stepped hole 6 respectively, and a radially expanding T-shaped head 4-2 is respectively arranged at the end, and the T-shaped head 4-2 is welded to the inner wall of the stepped hole 6 respectively. In one piece, the helical body 4-1 of the cylindrical coil spring 4 is fixed between the upper connecting plate 2 and the lower connecting plate 3.

Referring to Fig. 4, the specific composition of the T-shaped head 4-2 at each cylindrical helical spring 4 two ends in this example is as follows: the T-shaped head 4-2 that is positioned at the ladder hole 6 on the lower connecting plate 3 is made by winding The steel wire head of the spiral body 4-1 of cylindrical helical spring 4 radially expands to form, and the T-shaped head 4-2 of 6 in the ladder hole on the upper connecting plate 2 is threaded on the steel wire head of winding cylindrical helical spring 4 and A countersunk head round nut 9 is fixed by welding.

Referring to FIG. 1 , the difference between the inner diameter D of the cylindrical hole 10 and the outer diameter d of the cylindrical coil spring 4 in this example is 3mm.

Referring to Fig. 5 and Fig. 6, this example is obtained by adding a lead rod 8 on the basis of the embodiment shown in Figs. 1-4. The specific improvement method is that the elastic cement 12 injected in the cylindrical hole 10 is methyl silicone rubber, the aperture of the central hole 5 in the embodiment shown in Figures 1 to 4 is expanded and pressed into the lead rod 8, and the inner diameter of the cylindrical hole 10 The difference between D and the outer diameter d of the cylindrical coil spring 4 is 4 mm, and other structures are the same as those of the embodiment shown in Figs. 1-4.

Referring to Figures 7-9, this example is a support of a rectangular structure, which is a deformed product of the embodiment shown in Figures 5 and 6, and it differs from the embodiment shown in Figures 5 and 6 in that, Both the upper connecting plate 2 and the lower connecting plate 3 are rectangular steel plates, and the laminated rubber elastic 1 is a hexahedron with a rectangular cross section. In addition to the central hole 5, eight cylinders with a circular cross section are arranged in the body of the hexahedron. Holes 10, eight cylindrical holes 10 are evenly distributed around the axis of the central hole 5 and together with the central hole 5 form a 3 × 3 lattice, each cylindrical hole 10 is provided with a cylindrical coil spring 4 and is injected with a material of methyl The elastic cement 12 of vinyl phenyl silicone rubber; the difference between the inner diameter D of the cylindrical hole 10 and the outer diameter d of the cylindrical coil spring 4 is 5mm.

Referring to Fig. 10, this example is formed by making the following changes on the basis of the embodiment shown in Figs. The vertical centerline diagonal distribution.

The cylindrical helical spring 4 and the elastic cement 12 are the core components for completing the inventive task of the utility model. The working principle thereof will be briefly introduced below in conjunction with FIGS. 11a-11c and FIG.

Referring to Figure 11a and Figure 4, screw the countersunk round nut 9 in the stepped hole 6 of the upper connecting plate 3 during assembly, adjust the tensile stress of the cylindrical coil spring 4 to the design value, and then connect the countersunk round nut 9 with the winding The steel wire head of cylindrical helical spring 4 and the inwall of stepped hole 6 are welded dead. At this time, under the joint action of the cylindrical coil spring 4 and the elastic mastic 12 distributed in the laminated rubber elastic body 1, the entire shock-isolation bearing obtains the required early tensile stiffness. Referring to Fig. 11a, when the strong shear force generated by the earthquake is transmitted to the upper connecting plate 2 and the lower connecting plate 3, the cylindrical coil spring 4 is inclined and elongated with the relative displacement of the upper connecting plate 2 and the lower connecting plate 3, once When the external force is canceled, the internal tension of the cylindrical coil spring 4 acts on the upper connecting plate 2 and the lower connecting plate 3, providing tension for the reset of the building; The volume of 10 is constant, but the shape of the hole will change repeatedly, and the helix 4-1 of the cylindrical helical spring 4 is also stretched repeatedly, so the elastic mastic 12 must flow at high speed in the cylindrical hole 10, so that the molecules of the elastic mastic 12 The movement of the chain segment and the entire molecular chain is displaced, generating extremely strong viscous friction, absorbing the energy generated by external forces, and converting part of the energy into heat energy to dissipate, thereby generating damping effect to achieve vibration reduction and buffering. Referring to Fig. 11b and Fig. 11c, when an earthquake causes the building to vibrate up and down, the entire seismic isolation support must be subjected to tension and compression alternately. If it is compressed, in addition to the compression of the laminated rubber elastic 1 to produce damping, the column coil spring 4 and the elastic cement 12 are also compressed at the same time (see Figure 11b). During the volume compression process, the two will receive part of the energy and convert it into elastic potential energy Storing and generating elasticity at the same time, once the external force is removed, the two will recover by themselves under the action of compression elasticity; in addition, in the above process, as the column coil spring 4 is stretched and relaxed, the elastic cement 12 also flows at high speed in the cylindrical hole 10 resulting in a damping effect. Under tension, if the force is small, the rigidity of the entire support is relatively high due to the vacuum generated by the cylindrical hole 10, and the vibration damping and buffering effects are limited, but when the destructive tension acts on the support, once the laminated rubber elastic 1 When a large tensile deformation occurs, the cylindrical coil spring 4 immediately enters the working state to share the tension transmitted from the upper connecting plate 2 and the lower connecting plate 3 (see Figure 11c), and significantly improve the damage resistance of the entire support.

Claims (6)

1. compound tensile laminate rubber shock-insulation bracket, this bearing comprise upper junction plate (2), lower connecting plate (3) and are clamped in the laminated rubber elastic body (1) between two junction plates up and down, it is characterized in that,

Be evenly equipped with several cylindrical holes parallel (10) around its vertical center line in the body of laminated rubber elastic body (1), be respectively equipped with a through hole on the upper sealing plate (1-4) of the laminated rubber elastic body (1) at each cylindrical hole (10) two and the following shrouding (1-5) with described center line; Each

Be provided with a cylindrically coiled spring (4) in the cylindrical hole (10) and be marked with elastic cement (12), wherein, the steel wire of the conveyor screw (4-1) of coiling cylindrically coiled spring (4) extends to two respectively, fixedly connected with lower connecting plate (3) with upper junction plate (2) respectively after passing described through hole, described elastic cement (12) is methyl silicone rubber or methyl ethylene phenyl siloxane rubber; Each

Be respectively equipped with the sealing ring (11) that the steel wire with the conveyor screw (4-1) of coiling cylindrically coiled spring (4) is complementary in the described through hole.

2. a kind of compound tensile laminate rubber shock-insulation bracket according to claim 1, it is characterized in that, upper junction plate (2) and lower connecting plate (3) are gone up with described through hole opposite position and are respectively equipped with shoulder hole (6), two of the steel wire of the conveyor screw (4-1) of coiling cylindrically coiled spring (4) extends to respectively in the shoulder hole (6), the termination is established the T shape head (4-2) of a radial dilatation respectively, and this T shape head (4-2) is integrally welded respectively with the inwall of described shoulder hole (6).

3. a kind of compound tensile laminate rubber shock-insulation bracket according to claim 2, it is characterized in that, the T shape head (4-2) that is positioned at the terraced hole (6) on the lower connecting plate (3) is that the steel wire head radial expansion by the conveyor screw (4-1) of coiling cylindrically coiled spring (4) forms, and the T shape head (4-2) that is positioned at the terraced hole (6) on the upper junction plate (2) is to be threaded and to fix a countersunk head round nut (9) to constitute on the steel wire head of coiling cylindrically coiled spring (4).

4. according to the described a kind of compound tensile laminate rubber shock-insulation bracket of one of claim 1～3, it is characterized in that the difference of the external diameter of the internal diameter of described cylindrical hole (10) and cylindrically coiled spring (4) is 3～5mm.

5. according to the described a kind of compound tensile laminate rubber shock-insulation bracket of one of claim 1～3, it is characterized in that, also comprise some lead rods (8), this lead rod (8) vertically crosses laminated rubber elastic body (1), and evenly distributes around the vertical center line of laminated rubber elastic body (1).

6. a kind of compound tensile laminate rubber shock-insulation bracket according to claim 4, it is characterized in that, also comprise some lead rods (8), this lead rod (8) vertically crosses laminated rubber elastic body (1), and evenly distributes around the vertical center line of laminated rubber elastic body (1).

Images