CN111254989A - Spring core high damping rubber shock insulation support - Google Patents
Spring core high damping rubber shock insulation support Download PDFInfo
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- CN111254989A CN111254989A CN202010191314.XA CN202010191314A CN111254989A CN 111254989 A CN111254989 A CN 111254989A CN 202010191314 A CN202010191314 A CN 202010191314A CN 111254989 A CN111254989 A CN 111254989A
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- damping rubber
- spring
- connecting plate
- annular
- rubber block
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
Abstract
The invention provides a spring core high-damping rubber shock insulation support which comprises an upper connecting plate, wherein the bottom of the upper connecting plate is provided with at least three annular baffles, and an annular groove is formed between every two adjacent annular baffles; the high-damping rubber block is tightly attached to the lower surface of the upper connecting plate, an annular convex block is arranged at the upper end of the high-damping rubber block and is positioned right below the annular groove, and the annular convex block is embedded in the annular groove; a rubber protective layer is arranged on the periphery of the high-damping rubber block; and a lower connecting plate; the high-damping rubber block is provided with a cylindrical through hole, and a spring is arranged in the through hole; the upper end of the spring is connected with the bottom surface of the upper connecting plate, and the lower end of the spring is connected with the top surface of the lower connecting plate. The spring core high-damping rubber shock insulation support can ensure the shock insulation effect of the structure in the horizontal direction and the vertical direction in a strong earthquake, thereby improving the overall shock resistance of the structure.
Description
Technical Field
The invention relates to the technical field of shock insulation structures in subway stations, in particular to a spring core high-damping rubber shock insulation support.
Background
Earthquake damage of existing underground structures can be traced to 1923 years of great earthquake in Japan at the earliest time, water supply pipelines in Tokyo city are seriously damaged in the earthquake, and the south has no valley tunnel lining cracks all over the hole (Yuanyong et al, 2014). The column feet of a plurality of columns in an underground clear water pond of a water plant in the northern suburbs of the Tangshan in the great earthquake of the Tangshan in 1976 of China are shaken to be crisp, cement is peeled off, and reinforcing steel bars are exposed. Researchers also observed some slight cracks of subway stations and tunnels after Mexico earthquake in 1985, and the cracks are mainly distributed at the joints of the tunnels between subway sections and the station structures and the positions where the rigidity changes sharply. Especially, in the aseismic earthquake of osaka matter in 1995, people are given a sound to severe damage of large-scale underground stations of subways and tunnels among the stations, students pay attention to the study on the earthquake-resistant performance of underground structures of subways in strong earthquake, and begin to recognize that the earthquake-resistant performance of underground structures of cities in strong earthquake is very important for maintaining the structural safety and functions of underground structures of subways in strong earthquake, and repairing and rebuilding the underground structures after the earthquake.
The traditional earthquake-proof design method mostly utilizes the plastic deformation of the structure to absorb the energy input by the earthquake, thereby ensuring the earthquake safety. However, the seismic isolation structure can greatly reduce the acceleration reaction of the upper part of the building, so that the structure does not need to generate plastic deformation, and the normal functions of the structure and internal facilities and equipment thereof can be ensured. Therefore, the seismic isolation and reduction technology of the structure is considered to be an advanced technology which has important influence on seismic engineering, and can meet the overall requirement of building 'flexible cities' for improving the seismic isolation and reduction of buildings in future in China. However, the active and passive control theory and method of seismic isolation and reduction structure based on rigid foundation assumption are difficult to be applied to the specific requirements of seismic isolation and reduction of underground structure. Meanwhile, the underground structure is difficult to be completely separated from the surrounding foundation soil by adopting a shock isolation device, and the method for reducing the seismic response of the underground structure by prolonging the period of the underground structure is also difficult to realize.
In summary, in view of the particularity of the engineering field where the urban subway underground station structure is located, the self earthquake-proof performance and the complexity of the earthquake damage mechanism, it is urgently needed to research and develop earthquake reduction and isolation measures of the subway underground station structure and establish an earthquake reduction and isolation control theory and a practical design method suitable for the subway underground station structure.
Disclosure of Invention
In order to solve the problems, the invention provides the spring core high-damping rubber shock insulation support which can ensure the shock insulation effect of the structure in the horizontal direction and the vertical direction in a strong earthquake, so that the overall shock resistance of the structure is improved. In order to achieve the above purpose, the invention adopts a technical scheme that:
a spring core high damping rubber isolation bearing comprises: the bottom of the upper connecting plate is provided with at least three annular baffles, and an annular groove is formed between every two adjacent annular baffles; the high-damping rubber block is tightly attached to the lower surface of the upper connecting plate, an annular convex block is arranged at the upper end of the high-damping rubber block and is positioned right below the annular groove, and the annular convex block is embedded in the annular groove; a rubber protective layer is arranged on the periphery of the high-damping rubber block; the lower connecting plate is arranged at the lower end of the high-damping rubber block; the high-damping rubber block is provided with a cylindrical through hole, and a spring is arranged in the through hole; the upper end of the spring is connected with the bottom surface of the upper connecting plate, and the lower end of the spring is connected with the top surface of the lower connecting plate.
Further, the through hole, the high damping rubber block and the spring are coaxially arranged.
Furthermore, the upper connecting plate and the lower connecting plate are made of metal materials, and the thickness of the upper connecting plate and the lower connecting plate is 1-3 cm; the groove width of the annular groove is 1-3 cm, and the depth of the annular groove is 1-3 cm.
Further, the high-damping rubber block is made of the high-damping rubber material, and the Young modulus of the high-damping rubber material is 0.1-1 MPa at most.
Further, the diameter d of the through hole110-35 cm; diameter d of the spring2Is d1～d1(-1)mm。
Further, the axial stiffness variation range F of the spring1300-500 KN/mm, and the transverse stiffness of the spring is 1/2F1。
Further, the rotation angle of the vibration isolation support is less than 0.015 rad.
Further, the vertical bearing capacity of the vibration isolation support is 200kN-25000 kN.
Furthermore, the equivalent damping ratio of the vibration isolation support is more than 8%, and the application temperature range is-20-50 ℃.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) according to the spring core high-damping rubber shock insulation support, the top end of the high-damping rubber block is embedded in the lower surface of the upper connecting plate to form a sawtooth type staggered joint connecting structure, so that the capability of resisting horizontal force of the shock insulation support is guaranteed, the high-damping rubber is not subjected to tensile stress under tensile stress, and the high-damping rubber is not damaged by tension. Meanwhile, the rigid spring is arranged in the center of the high-damping rubber block, so that the recovery capability of the high-damping rubber after horizontal deformation is improved, meanwhile, enough vertical tension and compression capability is provided, and the high-damping rubber is prevented from generating excessive tension and compression damage. The springs are arranged up and down and fixedly connected with the upper connecting plate and the lower connecting plate, so that the tensile and pressure resistance of the shock insulation support is guaranteed.
(2) According to the high-damping rubber shock insulation support with the spring core, after the shock insulation support is applied to the connection structure of the center pillar of the underground station of the subway, the shear resistance of the underground station and the tensile and compressive capacity of the center pillar can be remarkably improved. The effectual not enough of filling underground structure shock-absorbing technique reduces the earthquake of the center pillar of subway underground station structure and isolation bearing itself and destroys the risk, improves the whole anti-seismic performance of subway station structure, alleviates huge economic loss and the casualties that subway underground station structure earthquake destruction brought. And the rapid development of the earthquake-proof and disaster-reduction work of the life line engineering of the major city of urban rail transit in China is powerfully promoted, and important scientific basis and technical guarantee are provided for improving the toughness of the underground space in the construction of the 'toughness city' in China.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a spring core high damping rubber vibration isolation bearing according to an embodiment of the present invention;
FIG. 2 is a top view of a high damping rubber block according to an embodiment of the present invention;
fig. 3 is a bottom view of the upper connecting plate according to an embodiment of the present invention.
Reference numerals
1 upper junction plate, 11 annular baffle, 12 annular grooves, 2 high damping rubber blocks, 21 annular bumps, 22 rubber protective layers, 23 through holes, 3 lower junction plates, 4 springs and 5 mounting holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the embodiment of the invention discloses a spring core high damping rubber vibration isolation support, which comprises: upper junction plate 1, high damping rubber piece 2, lower connecting plate 3 and spring 4.
The upper connecting plate 1 is made of metal materials, and hard steel plates are preferably selected, so that the upper connecting plate can be well connected with a main structure of a station in a stress process without deformation. At least three annular baffles 11 are arranged at the bottom of the upper connecting plate 1, and an annular groove 12 is formed between every two adjacent annular baffles 11. The thickness of the upper connecting plate 1 is 1-3 cm. The groove width of the annular groove 12 is 1-3 cm, and the depth of the annular groove 12 is 1-3 cm.
The high-damping rubber block 2 is made of a high-damping rubber material, and the Young's modulus of the high-damping rubber material is 0.1-1 MPa at most. The high-damping rubber block 2 is tightly attached to the lower surface of the upper connecting plate 1, an annular bump 21 is arranged at the upper end of the high-damping rubber block 2, the annular bump 21 is located under the annular groove 12, and the annular bump 21 is embedded in the annular groove 12. The annular bump 21 and the annular groove 12 form zigzag staggered joint connection, so that the horizontal shearing force transmission of the high-damping rubber block 2 and the upper connecting plate 1 is ensured, and meanwhile, the high-damping rubber block 2 and the upper connecting plate 1 are ensured not to generate tension transmission when being vertically pulled. The periphery of the high-damping rubber block 2 is provided with a rubber protective layer 22 for preventing the high-damping rubber block 2 from being damaged or aged due to long-term contact with air in the using process, so that the using performance is influenced.
The high-damping rubber block 2 is provided with a cylindrical through hole 23, and a spring 4 is arranged in the through hole 23. When an earthquake occurs, the spring 4 limits the excessive shearing deformation of the high damping rubber, and the vibration isolation support has good limiting and shearing deformation self-recovery capabilities. The upper end of the spring 4 is connected with the bottom surface of the upper connecting plate 1, and the welding mode is optimized. The lower end of the spring 4 is connected with the top surface of the lower connecting plate 3, preferably in a welding mode. When an earthquake happens, the shock insulation support improves the vertical tensile capacity under the action of the spring 4, and the damage to the center column of the underground station structure under the earthquake vertical tensile force is prevented. The through hole 23, the high damping rubber block 2 and the spring 4 are preferably arranged coaxially, so that the uniform stress is ensured. Diameter d of the through-hole 231Is 10-35 cm. Diameter d of the spring 42Is d1～d1The outer wall of the spring 4 is abutted against the inner wall of the through hole 23 to ensure that the spring 4 and the high damping rubber block 2 have good horizontal shearing deformation coordination capacity (minus 1 mm). Range of variation F of axial stiffness of said spring 41300-500 KN/mm, and the transverse rigidity of the spring 4 is 1/2F1。
The lower connecting plate 3 is made of metal materials, and preferably made of hard steel plates. The lower connecting plate 3 is arranged at the lower end of the high-damping rubber block 2. The thickness of the lower connecting plate 1 is 1-3 cm. And the rotation angle of the shock insulation support is less than 0.015 rad. The vertical bearing capacity of the vibration isolation support is 200kN-25000 kN. The equivalent damping ratio of the vibration isolation support is more than 8%, and the application temperature range is-20-50 ℃.
When in use, the shock insulation support is fixedly connected with the part to be connected of the underground station through the upper connecting plate 1 and the mounting holes 5 on the lower connecting plate 3. When an earthquake occurs, the destructive force of the earthquake on an underground station can be divided into horizontal destructive force and vertical destructive force. Under the effect of horizontal destructive power high damping rubber block 2 receives the level to the shearing force, high damping rubber block 2 is in order to offset partial horizontal destructive power of earthquake through elastic shear deformation, the horizontal elastic deformation of upper junction plate 1 and high damping rubber block 2 is guaranteed to the zigzag fissure of displacement structure, makes high damping rubber block 2 and the horizontal shearing force transmission of upper junction plate 1. The spring 4 can limit the transitional shearing deformation of the high-damping rubber block 2 to ensure that the high-damping rubber block has good horizontal shearing self-recovery capability.
Under the action of vertical destructive force, because the spring 4 is fixedly connected with the upper connecting plate 1 and the lower connecting plate 3, under the action of vertical tensile force, tensile force cannot be transmitted between the high-damping rubber block 2 and the upper connecting plate 1, and the spring 4 provides tensile force to protect the high-damping rubber block 2 from being damaged by the tensile force. Under the effect of vertical pressure, undertake vertical pressure through spring 4 and high damping block rubber 2 jointly, guarantee that high damping block rubber 2 does not produce excessive pressurized destruction, through the vertical pressurized deformation of high damping block rubber 2, offset the vertical destructive power of partial earthquake, provide fine vertical anti-seismic performance for the underground station structure center pillar.
The above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes that are transformed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a spring core high damping rubber shock insulation support which characterized in that includes:
the bottom of the upper connecting plate (1) is provided with at least three annular baffles (11), and an annular groove (12) is formed between every two adjacent annular baffles (11);
the high-damping rubber block (2) is tightly attached to the lower surface of the upper connecting plate (1), an annular convex block (21) is arranged at the upper end of the high-damping rubber block (2), the annular convex block (21) is located right below the annular groove (12), and the annular convex block (21) is embedded in the annular groove (12); a rubber protective layer (22) is arranged on the periphery of the high-damping rubber block (2); and
the lower connecting plate (3) is arranged at the lower end of the high-damping rubber block (2);
wherein, the high damping rubber block (2) is provided with a cylindrical through hole (23), and a spring (4) is arranged in the through hole (23); the upper end of the spring (4) is connected with the bottom surface of the upper connecting plate (1), and the lower end of the spring (4) is connected with the top surface of the lower connecting plate (3).
2. The spring core high damping rubber isolation bearing of claim 1, wherein the through hole (23), the high damping rubber block (2) and the spring (4) are coaxially arranged.
3. The spring core high-damping rubber vibration-isolating support is characterized in that the upper connecting plate (1) and the lower connecting plate (3) are made of metal materials, and the thicknesses of the upper connecting plate (1) and the lower connecting plate (3) are 1-3 cm; the groove width of the annular groove (12) is 1-3 cm, and the depth of the annular groove (12) is 1-3 cm.
4. The spring core high-damping rubber vibration-isolating support as claimed in claim 1, wherein the high-damping rubber block (2) is composed of the high-damping rubber material, and the Young's modulus of the high-damping rubber material is 0.1-1 MPa at most.
5. The spring core high damping rubber isolation bearing of claim 1, whichCharacterized in that the diameter d of the through-hole (23)110-35 cm; diameter d of the spring (4)2Is d1～d1(-1)mm。
6. The spring-core high-damping rubber isolation bearing as claimed in claim 1, wherein the range F of variation of the axial stiffness of the spring (4)1300-500 KN/mm, and the transverse stiffness of the spring (4) is 1/2F1。
7. The spring core high damping rubber isolation bearing of claim 1, wherein the angle of rotation of the isolation bearing is less than 0.015 rad.
8. The spring core high damping rubber isolation bearing of claim 1, wherein the vertical bearing capacity of the isolation bearing is 200kN-25000 kN.
9. The spring core high-damping rubber vibration isolation support as claimed in claim 1, wherein the equivalent damping ratio of the vibration isolation support is more than 8%, and the application temperature range is-20-50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191314.XA CN111254989A (en) | 2020-03-18 | 2020-03-18 | Spring core high damping rubber shock insulation support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191314.XA CN111254989A (en) | 2020-03-18 | 2020-03-18 | Spring core high damping rubber shock insulation support |
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| CN111254989A true CN111254989A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010191314.XA Pending CN111254989A (en) | 2020-03-18 | 2020-03-18 | Spring core high damping rubber shock insulation support |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286917A (en) * | 2010-11-11 | 2011-12-21 | 东南大学 | Multifunctional isolation bridge bearing |
| CN102287007A (en) * | 2010-11-11 | 2011-12-21 | 东南大学 | Soft steel core rubber mat-steel spring combined seismic isolation supporting seat |
| CN204728470U (en) * | 2015-05-29 | 2015-10-28 | 南通蓝科减震科技有限公司 | A kind of Self-resetting stair shock isolating pedestal and quakeproof stair |
| CN205775821U (en) * | 2016-06-29 | 2016-12-07 | 河海大学 | A kind of limit-type rubber earthquake isolation support |
| CN208718138U (en) * | 2018-07-17 | 2019-04-09 | 中铁第一勘察设计院集团有限公司 | A kind of spacing-type tin core rubber earthquake isolation support |
| CN209907641U (en) * | 2019-03-15 | 2020-01-07 | 华北理工大学 | Building shock isolation device |
-
2020
- 2020-03-18 CN CN202010191314.XA patent/CN111254989A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286917A (en) * | 2010-11-11 | 2011-12-21 | 东南大学 | Multifunctional isolation bridge bearing |
| CN102287007A (en) * | 2010-11-11 | 2011-12-21 | 东南大学 | Soft steel core rubber mat-steel spring combined seismic isolation supporting seat |
| CN204728470U (en) * | 2015-05-29 | 2015-10-28 | 南通蓝科减震科技有限公司 | A kind of Self-resetting stair shock isolating pedestal and quakeproof stair |
| CN205775821U (en) * | 2016-06-29 | 2016-12-07 | 河海大学 | A kind of limit-type rubber earthquake isolation support |
| CN208718138U (en) * | 2018-07-17 | 2019-04-09 | 中铁第一勘察设计院集团有限公司 | A kind of spacing-type tin core rubber earthquake isolation support |
| CN209907641U (en) * | 2019-03-15 | 2020-01-07 | 华北理工大学 | Building shock isolation device |
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Application publication date: 20200609 |
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