CN113463505B - Bridge shock insulation support - Google Patents
Bridge shock insulation support Download PDFInfo
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- CN113463505B CN113463505B CN202110877507.5A CN202110877507A CN113463505B CN 113463505 B CN113463505 B CN 113463505B CN 202110877507 A CN202110877507 A CN 202110877507A CN 113463505 B CN113463505 B CN 113463505B
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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
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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
- E01D19/041—Elastomeric bearings
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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
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- 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
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Abstract
A bridge shock insulation support belongs to the technical field of bridge shock resistance and comprises an upper base plate, a lower base plate, an upper support barrel, a lower support barrel and two springs, wherein the first spring is a compression spring, the second spring is a tension spring, seat rings are arranged at two ends of the tension spring, one end of the large seat ring is a large seat ring, the other end of the small seat ring is a small seat ring, the inner diameter of the lower support barrel is equal to the inner diameter of the large seat ring, the inner diameter and the outer diameter of the upper support barrel are equal to the inner diameter and the outer diameter of the small seat ring, and the outer diameter of the first spring is smaller than the inner diameter of the small seat ring; the first spring is inserted into the second spring and extends out of the seat rings at the two ends of the second spring, the two ends of the first spring are fixedly arranged on the upper seat plate and the lower seat plate, the upper end of the upper support cylinder is fixedly arranged on the small seat ring, and the lower end of the upper support cylinder is fixedly arranged on the lower seat plate; the lower end of the lower support cylinder is fixedly arranged on the large seat ring, and the upper end of the lower support cylinder is fixedly arranged on the upper seat plate. When pier or bridge floor receive vibrations, pressure spring and extension spring all can receive the extrusion of pier and bridge floor and cut down the vibrations energy, and the two buffer frequency can the diverse simultaneously, can effectively eliminate resonance.
Description
Technical Field
The invention relates to the technical field of bridge seismic resistance, in particular to a bridge seismic isolation support.
Background
The bridge is an important part of a highway, and vibration is generated when vehicles run on the surface of the bridge, so that the bridge must be isolated. Isolation bearing uses very extensively at present in current building structure, and it is rubber isolation bearing comparatively commonly used, through the elastic action of rubber, realizes reducing the effect of horizontal vibrations, also can guarantee sufficient vertical load simultaneously to support the building of building on isolation bearing.
For example, patent document CN 110700085B discloses a bridge seismic isolation bearing, which comprises an upper connection plate, a seat plate, a lower connection plate, a laminated rubber and a damping core, wherein the upper connection plate is connected with a bridge deck, the lower connection plate is connected with a bridge pier, the laminated rubber is fixed between the seat plate and the lower connection plate, the damping core is embedded in the center of the laminated rubber, a hollow tube extending in a spiral shape is fixed on the seat plate, the upper end of the hollow tube is fixed with the lower side surface of the upper connection plate, the lower end of the hollow tube is fixed with the upper side surface of a base, and a filler is filled in the hollow tube; this bridge isolation bearing, through the setting of hollow tube, alright realize earlier receiving the upper junction plate at the in-process of transportation installation, then realize isolated vertical vibration's effect through the mode of pouring into the stopping after the installation is accomplished. However, the hollow tube extending in a spiral shape in this embodiment actually corresponds to a spring, and the spring easily exceeds the yield strength and loses its elasticity after being pressed between the bridge pier and the bridge plate for a long time.
Patent document CN 110983955B discloses an anti-seismic support for a bridge, which includes a support plate system and a multi-directional energy dissipation structure. The supporting plate system comprises an upper supporting plate fixedly connected with the upper bridge structure, a lower supporting plate fixedly connected with the lower bridge structure and a middle supporting plate arranged between the upper supporting plate and the lower supporting plate; the multidirectional energy dissipation structure is formed by mutually matching a steel ring energy dissipation element, an eddy current damping element and a soft steel damping element; the steel ring energy dissipation element is arranged between the upper supporting plate and the middle supporting plate; the eddy current damping element and the mild steel damping element are arranged between the middle support plate and the lower support plate; the anti-seismic support for the bridge can realize multi-stage multidirectional energy consumption and improve the anti-seismic performance of the bridge. But its steel ring dissipative element also easily loses elasticity because of long-term pressure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a bidirectional recovery spring device used as a bridge seismic isolation support so as to keep the elasticity of the spring and prolong the effective service life.
In order to solve the technical problem, the invention adopts the technical scheme that the bridge shock insulation support comprises an upper seat plate, a lower seat plate and a spring, wherein the upper seat plate is connected with a bridge floor, and the lower seat plate is connected with a pier; the device is characterized by further comprising a lower support cylinder and an upper support cylinder, wherein the number of the springs is two; the first spring is a pressure spring, and the inner diameter and the outer diameter of an effective ring of the pressure spring are equal to those of the seat ring; the second spring is a tension spring, two ends of the effective ring which is pulled to be yellow are provided with seat rings instead of the pulling ring, wherein the seat ring at one end is a large seat ring, the inner diameter of the large seat ring is larger than the outer diameter of the effective ring, the seat ring at the other end is a small seat ring, and the outer diameter of the small seat ring is smaller than the inner diameter of the effective ring; the inner diameter of the lower supporting cylinder is equal to that of the large seat ring, the inner diameter of the upper supporting cylinder is equal to that of the small seat ring, and the outer diameter of the upper supporting cylinder is equal to that of the small seat ring; the outer diameter of the first spring is smaller than the inner diameter of the small seat ring; the first spring is inserted into the second spring and extends out of the seat rings at the two ends of the second spring, one end of the first spring is fixedly arranged on the upper seat plate, and the other end of the first spring is fixedly arranged on the lower seat plate; the upper supporting cylinder is inserted through the inner spiral annular wall of the second spring, the upper end face of the upper supporting cylinder is fixedly installed on the lower side surface of the small seat ring, and the lower end face of the upper supporting cylinder is fixedly installed on the lower seat plate; the lower supporting cylinder is wrapped and inserted in the outer spiral annular wall of the second spring, the lower end face of the lower supporting cylinder is fixedly installed on the upper side surface of the large seat ring, and the upper end face of the lower supporting cylinder is fixedly installed on the upper seat plate; therefore, when the bridge pier is impacted due to earthquake or the bridge floor is impacted due to vehicle vibration, the first spring can be extruded by the bridge pier and the bridge floor and reduces vibration energy, meanwhile, the second spring can be pulled and supported by the upper supporting cylinder and the lower supporting cylinder and reduces vibration energy, and the two springs can effectively consume vibration and effectively isolate vibration under the bidirectional action; meanwhile, as the tension spring and the pressure spring are mutually sleeved, the buffering frequencies of the tension spring and the pressure spring are different when the tension spring and the pressure spring are vibrated, so that resonance is effectively eliminated, and vibration energy can be further dissipated.
Further, the inner diameter of the large seat ring is 1.01-1.10 times of the outer diameter of the effective ring, and the outer diameter of the small seat ring is 0.90-0.99 times of the inner diameter of the effective ring.
Further, the outer diameter of the first spring is equal to 0.90-0.99 times of the inner diameter of the small retainer in the second spring.
In the above, the outer diameter of the lower support cylinder may be greater than the outer diameter of the large seat ring, or may be equal to the outer diameter of the large seat ring.
Further, the contact length of the first spring is set to be M1, the yield length is set to be Q1, the length of each coil of the contact long finger spring when the contact long finger spring is completely contacted is set to be the maximum elongation length of the contact long finger spring which can restore to the original state after the external force disappears after the contact long finger spring is elongated by the external force, the contact length of the second spring is set to be M2, the yield length is set to be Q2, the length of the lower support cylinder is set to be H, and the length of the upper support cylinder is set to be K; the adherence length of the first spring is greater than the length of the lower support cylinder plus the length of the support cylinder minus the yield length of the second spring, namely M1 is greater than H + K-Q2; so that the second spring never exceeds the yield strength and loses its resiliency.
The yield length of the first spring is greater than the length of the lower support cylinder plus the length of the support cylinder minus the adherence length of the second spring, namely Q1 is greater than H + K-M2; so that the first spring never exceeds the yield strength and loses its elasticity.
The lengths of the lower supporting cylinder and the upper supporting cylinder are both larger than the close length of the second spring, namely H is larger than M2 and K is larger than M2; the lengths of the lower supporting cylinder and the upper supporting cylinder are smaller than the yield length of the second spring, namely H is smaller than M2 and K is smaller than M2.
Preferably, the free length of the first spring is equal to the length of the lower support cylinder plus the length of the support cylinder minus the free length of the second spring, and the length of the lower support cylinder is equal to the length of the upper support cylinder, i.e., L1= H + K-L2 and H = K; the free length of the first spring is L1, the free length of the second spring is L2, and the free length refers to the natural length of the spring when the spring is not acted by external force.
A manufacturing method of a bridge seismic isolation support comprises the following steps:
preparing two springs, wherein one spring is a compression spring and is used as a first spring, and the inner diameter and the outer diameter of an effective ring and a seat ring of the first spring are equal; the other spring is a tension spring and serves as a second spring, two ends of an effective ring of the second spring are not provided with common pull rings but are provided with seat rings, the seat ring at one end is a large seat ring, the inner diameter of the large seat ring is larger than the outer diameter of the effective ring, the seat ring at the other end is a small seat ring, and the outer diameter of the small seat ring is smaller than the inner diameter of the effective ring; and the outer diameter of the first spring is smaller than the inner diameter of the small retainer of the second spring.
Preparing two cylinders with two through ends, wherein the inner diameter and the outer diameter of one cylinder are the same as those of the large seat ring, and the cylinder is used as a lower support cylinder which is supported downwards; the inner diameter and the outer diameter of the other cylinder are the same as those of the small seat ring, and the cylinder is used as an upper supporting cylinder which is supported upwards; the sum of the lengths of the two cylinders is less than the contact length of the first spring plus the yield length of the second spring, and less than the yield length of the first spring plus the contact length of the second spring.
Preparing two seat plates, wherein one seat plate is an upper seat plate, the other seat plate is a lower seat plate, the seat plates can be square or round, and the diameter of the seat plates is larger than that of the large seat ring, preferably 1.5 times of that of the large seat ring.
Fourthly, the upper supporting cylinder penetrates through the large seat ring and the effective ring of the second spring, and the upper end face of the upper supporting cylinder is fixedly installed on the lower side surface of the small seat ring; and inserting the lower supporting cylinder package through the small seat ring and the effective ring of the second spring, and fixedly installing the lower end surface of the lower supporting cylinder on the upper side surface of the large seat ring.
Fifthly, the first spring penetrates through the upper supporting cylinder and the small retainer of the second spring, then the upper side surface of the upper end retainer of the first spring is fixedly installed on the lower surface of the upper seat plate, and the lower side surface of the lower end retainer of the first spring is fixedly installed on the upper surface of the lower seat plate.
Sixthly, fixedly mounting the upper end face of the lower supporting cylinder on the lower surface of the upper seat plate, and fixedly mounting the lower end face of the upper supporting cylinder on the upper surface of the lower seat plate; thus, the bridge seismic isolation bearing is manufactured.
Compared with the prior art, the invention has the following beneficial effects:
the novel tension spring damping structure has the advantages that hook rings of the tension spring are changed into the seat rings, the seat rings at two ends are made larger and smaller, the upper supporting cylinder and the lower supporting cylinder are convenient to assemble, the direction of vibration force between a bridge floor and a pier is changed, and therefore the novel tension spring damping structure is suitable for damping of the tension spring.
Two springs are adopted in the two storeys, one of them is another pressure spring for the extension spring, and bridge floor and pier are connected simultaneously to these two springs, can follow two directions simultaneously and carry out the shock insulation between bridge floor and the pier.
Thirdly, the tension spring and the pressure spring are mutually sleeved, when the shock is received, the buffering frequency of the tension spring and the buffering frequency of the pressure spring are different, so that resonance is effectively eliminated, shock energy can be further dissipated, and the shock insulation effect is improved.
Drawings
Fig. 1 is a perspective structural diagram of the present invention.
Fig. 2 is a schematic structural view of a second spring according to the present invention.
Fig. 3 is a schematic structural view of the first spring according to the present invention.
Fig. 4 is a schematic structural view of the lower seat plate and the upper support cylinder in the invention.
Fig. 5 is a schematic structural view of an upper seat plate and a lower support cylinder in the invention.
In the figure: 1. the spring seat comprises an upper seat plate, a lower seat plate 2, a lower support cylinder 3, an upper support cylinder 4, a first spring 5, an effective ring 6, a seat ring 7, a second spring 8, a large seat ring 9 and a small seat ring 10.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to illustrate the invention and not to limit the invention further, and should not be construed as limiting the scope of the invention.
Example 1.
As shown in the figure, the existing seismic isolation support comprises an upper seat plate 1, a lower seat plate 2 and springs, a lower support cylinder 3 and an upper support cylinder 4 are additionally arranged on the basis of the existing seismic isolation support, and the number of the springs is two; one of the springs is a first spring 5, the first spring 5 is a pressure spring, and the inner diameter and the outer diameter of an effective ring 6 of the pressure spring are equal to those of a seat ring 7; the other spring is a second spring 8, the second spring 8 is a tension spring, two ends of the effective ring 6 which is pulled to be yellow are provided with a seat ring 7 instead of the pulling ring, wherein the seat ring 7 at one end is a large seat ring 9, the inner diameter of the large seat ring 9 is larger than the outer diameter of the effective ring 6 of the tension spring, the seat ring 7 at the other end is a small seat ring 10, and the outer diameter of the small seat ring 10 is smaller than the inner diameter of the effective ring 6 of the second spring 8; meanwhile, the inner diameter of the lower supporting cylinder 3 is made to be equal to the inner diameter of the large seat ring 9, the outer diameter of the lower supporting cylinder 3 is made to be equal to the outer diameter of the large seat ring 9, the inner diameter of the upper supporting cylinder 4 is made to be equal to the inner diameter of the small seat ring 10, and the outer diameter of the upper supporting cylinder 4 is made to be equal to the outer diameter of the small seat ring 10; the outer diameter of the first spring 5 is made smaller than the inner diameter of the small retainer 10 of the second spring 8; the terms greater than, less than or equal to in the above all refer to the length of the relevant body being greater than, less than or equal to.
The first spring 5 penetrates through the second spring 8 and extends out of the races at the two ends of the second spring 8, one end of the first spring 5 is fixedly installed on the upper seat plate 1, and the other end of the first spring 5 is fixedly installed on the lower seat plate 2; the upper supporting cylinder 4 penetrates through the inner spiral annular wall of the second spring 8, the upper end face of the upper supporting cylinder is fixedly installed on the lower side surface of the small seat ring 10, and the lower end face of the upper supporting cylinder 4 is fixedly installed on the lower seat plate 2; the lower supporting cylinder 3 is wrapped and inserted into the outer spiral annular wall of the second spring 8, the lower end face of the lower supporting cylinder is fixedly installed on the upper side surface of the large seat ring 9, and the upper end face of the lower supporting cylinder 3 is fixedly installed on the upper seat plate 1.
When in use, the lower seat plate 2 is fixedly arranged on a pier, and the upper seat plate 1 is fixedly arranged on the lower surface of a bridge floor; therefore, when the bridge pier is impacted due to earthquake or the bridge floor is vibrated by vehicles, the first spring 5 can be extruded by the bridge pier and the bridge floor and reduce vibration energy, meanwhile, the second spring 8 can be pulled and supported by the upper supporting cylinder 4 and the lower supporting cylinder 3 and reduce vibration energy, and the two springs can effectively consume vibration and effectively isolate the vibration under the bidirectional action of the two springs; meanwhile, as the tension spring and the pressure spring are mutually sleeved, the buffering frequencies of the tension spring and the pressure spring are different when the tension spring and the pressure spring are vibrated, so that resonance is effectively eliminated, and vibration energy can be further dissipated.
Example 2.
On the basis of the above, the inner diameter of the large retainer 9 is made to be 1.01-1.10 times of the outer diameter of the effective ring 6 of the second spring 8, and the outer diameter of the small retainer 10 is made to be 0.90-0.99 times of the inner diameter of the effective ring 6 of the second spring 8; the outer diameter of the first spring 5 is made equal to 0.90-0.99 times the inner diameter of the small retainer 10 of the second spring 8.
Setting the adherence length of the first spring 5 to be M1, the yield length to be Q1, the adherence length of the second spring 8 to be M2, the yield length to be Q2, the length of the lower support cylinder 3 to be H, and the length of the upper support cylinder 4 to be K; the free length of the first spring 5 is L1, and the free length of the second spring 8 is L2; the length of each spring ring of the close-contact long finger spring when being completely sealed; the yield length refers to the maximum elongation length of the spring which can be completely restored after the external force disappears after the spring is elongated by the external force; if the elastic body can not be completely restored, the elastic body is shown to be lost; the free length refers to the natural length of the spring when not subjected to external force.
In the embodiment, the adherence length of the first spring 5 is made to be greater than the length of the lower support barrel 3 plus the length of the support barrel 4 minus the yield length of the second spring 8, namely M1 is greater than H + K-Q2, namely Q2 is greater than H + K-M1; so that the second spring never exceeds the yield strength and loses its resiliency.
The yield length of the first spring 5 is made to be larger than the length of the lower support cylinder 3 plus the length of the support cylinder 4 minus the adherence length of the second spring 8, namely Q1 is larger than H + K-M2; so that the first spring 5 never exceeds the yield strength and loses its elasticity.
The lengths of the lower supporting cylinder 3 and the upper supporting cylinder 4 are both made to be larger than the close length of the second spring 8, namely H is larger than M2 and K is larger than M2; the lengths of the lower supporting cylinder 3 and the upper supporting cylinder 4 are made to be smaller than the yield length of the second spring 8, namely H is smaller than Q2 and K is smaller than Q2.
The better scheme is as follows: the free length of the first spring 5 is equal to the length of the lower support cylinder 3 plus the length of the support cylinder 4 minus the free length of the second spring 8, while the length of the lower support cylinder 3 is equal to the length of the upper support cylinder 4, i.e., L1= H + K-L2 and H = K.
Example 3.
A manufacturing method of a bridge seismic isolation support comprises the following steps:
preparing two springs, wherein one spring is a compression spring and is used as a first spring 5, and the inner diameter and the outer diameter of an effective ring 6 and a seat ring 7 of the first spring 5 are equal; the other spring is a tension spring and serves as a second spring 8, two ends of an effective ring 6 of the second spring 8 are not provided with common pull rings but are provided with seat rings 7, wherein the seat ring 7 at one end is a large seat ring 9, the inner diameter of the large seat ring 9 is larger than the outer diameter of the effective ring 6, and the inner diameter of the large seat ring 9 is made to be equal to 1.05 times of the outer diameter of the effective ring 6 of the second spring 8; the seat ring 6 at the other end is a small seat ring 10, the outer diameter of the small seat ring 10 is smaller than the inner diameter of the effective ring 6, and the outer diameter of the small seat ring 10 is made to be 0.95 times of the inner diameter of the effective ring 6 of the second spring 8 in the embodiment; and the outer diameter of the first spring 5 is smaller than the inner diameter of the small retainer 10 of the second spring 8, in this embodiment, the outer diameter of the first spring 5 is made to be equal to 0.95 times of the inner diameter of the small retainer 10 of the second spring 8.
Preparing two cylinders with two through ends, wherein the inner diameter and the outer diameter of one cylinder are the same as those of the large seat ring 9 of the second spring 8, and the cylinders are used as lower supporting cylinders 3 which are supported downwards; the inner diameter and the outer diameter of the other cylinder are the same as those of the small seat ring 10 of the second spring 8, and the other cylinder is used as an upper supporting cylinder 4 which is supported upwards; and the sum of the lengths of the two cylinders is made smaller than the adherence length of the first spring 5 plus the yield length of the second spring 8.
Preparing two base plates, wherein one base plate is an upper base plate 1, the other base plate is a lower base plate 2, the diameter of the base plate is larger than the diameter of the large seat ring, the base plate is made into a square plate body in the embodiment, and the side length of the square plate body is made into 1.5 times of the diameter of the large seat ring.
Fourthly, placing a second spring 8 in the upward direction of a lower small seat ring 10 according to a large seat ring 9, enabling an upper support cylinder 4 to penetrate through the large seat ring 9 and an effective ring 6 of the second spring 8 from bottom to top, and welding the upper end face of the upper support cylinder 4 to the lower side surface of the small seat ring 10; and then the lower support cylinder 3 is inserted through the small seat ring 10 and the effective ring 6 of the second spring 8 from top to bottom, and the lower end face of the lower support cylinder 3 is welded on the upper side surface of the large seat ring 9.
Fifthly, the first spring 5 passes through the upper support cylinder 4 and the small retainer 10 of the second spring 8, then the upper side surface of the upper end retainer 7 of the first spring 5 is welded to the lower surface of the upper seat plate 1, and the lower side surface of the lower end retainer 7 of the first spring 5 is welded to the upper surface of the lower seat plate 2.
Sixthly, welding the upper end face of the lower supporting cylinder 3 to the lower surface of the upper seat plate 1, and welding the lower end face of the upper supporting cylinder 4 to the upper surface of the lower seat plate 2; thus the bridge seismic isolation bearing is manufactured.
Claims (7)
1. A bridge shock insulation support comprises an upper seat plate, a lower seat plate and springs, and is characterized by further comprising a lower support cylinder and an upper support cylinder, wherein the number of the springs is two; the first spring is a pressure spring, and the inner diameter and the outer diameter of an effective ring of the pressure spring are equal to those of the seat ring; the second spring is a tension spring, two ends of an effective ring of the tension spring are provided with seat rings, wherein the seat ring at one end is a large seat ring, the inner diameter of the large seat ring is larger than the outer diameter of the effective ring, the seat ring at the other end is a small seat ring, and the outer diameter of the small seat ring is smaller than the inner diameter of the effective ring; the inner diameter of the lower supporting cylinder is equal to that of the large seat ring, the inner diameter of the upper supporting cylinder is equal to that of the small seat ring, and the outer diameter of the upper supporting cylinder is equal to that of the small seat ring; the outer diameter of the first spring is smaller than the inner diameter of the small seat ring; the first spring is inserted into the second spring and extends out of the seat rings at the two ends of the second spring, one end of the first spring is fixedly arranged on the upper seat plate, and the other end of the first spring is fixedly arranged on the lower seat plate; the upper supporting cylinder is inserted into the inner spiral annular wall of the second spring, the upper end face of the upper supporting cylinder is fixedly installed on the inner end face of the small seat ring, and the lower end face of the upper supporting cylinder is fixedly installed on the lower seat plate; the lower supporting cylinder is wrapped and inserted in the outer spiral annular wall of the second spring, the lower end face of the lower supporting cylinder is fixedly installed on the inner end face of the large seat ring, and the upper end face of the lower supporting cylinder is fixedly installed on the upper seat plate; the adherence length of the first spring is greater than the length of the lower support cylinder plus the length of the support cylinder minus the yield length of the second spring, namely M1 is greater than H + K-Q2; the contact length of the first spring is M1, the yield length of the first spring is Q1, the contact length of the second spring is M2, the yield length of the second spring is Q2, the length of the lower support cylinder is H, and the length of the upper support cylinder is K; the yield length of the first spring is greater than the length of the lower support cylinder plus the length of the support cylinder minus the contact length of the second spring, namely Q1 is greater than H + K-M2; the length of each ring of the close-contact long finger spring is the maximum elongation length of the yield long finger spring which can be restored to the original state after the external force disappears after the yield long finger spring is elongated by the external force.
2. The bridge seismic isolation bearing of claim 1, wherein the inner diameter of the large race is 1.01-1.10 times the outer diameter of the effective ring, and the outer diameter of the small race is 0.90-0.99 times the inner diameter of the effective ring.
3. The bridge seismic isolation bearing of claim 2, wherein the outer diameter of the lower support cylinder is equal to the outer diameter of the large race.
4. The bridge-isolated bearing of claim 3, wherein the outer diameter of the first spring is equal to 0.90-0.99 times the inner diameter of the small race.
5. The bridge seismic isolation bearing of claim 4, wherein the length of each of the lower support cylinder and the upper support cylinder is greater than the contact length of the second spring, i.e., H > M2 and K > M2.
6. The bridge-seismic isolation bearing of claim 5, wherein the free length of the first spring is equal to the length of the lower support cylinder plus the length of the support cylinder minus the free length of the second spring, and the length of the lower support cylinder is equal to the length of the upper support cylinder, i.e., L1= H + K-L2 and H = K; the free length of the first spring is L1, and the free length of the second spring is L2.
7. A method for manufacturing a bridge seismic isolation bearing as claimed in any of claims 1-6, characterized by comprising the steps of:
preparing two springs, wherein one spring is a compression spring and is used as a first spring, and the inner diameter and the outer diameter of an effective ring and a seat ring of the first spring are equal; the other spring is a tension spring and serves as a second spring, two ends of an effective ring of the second spring are provided with seat rings, the seat ring at one end is a large seat ring, and the inner diameter of the large seat ring is larger than the outer diameter of the effective ring; the seat ring at the other end is a small seat ring, and the outer diameter of the small seat ring is smaller than the inner diameter of the effective ring; the outer diameter of the first spring is smaller than the inner diameter of the small seat ring of the second spring;
preparing two cylinders with two through ends, wherein the inner diameter and the outer diameter of one cylinder are the same as those of the large seat ring, and the cylinder is used as a lower support cylinder which is supported downwards; the inner diameter and the outer diameter of the other cylinder are the same as those of the small seat ring, and the cylinder is used as an upper supporting cylinder which is supported upwards;
preparing two seat plates, wherein one seat plate is an upper seat plate, the other seat plate is a lower seat plate, and the diameter of each seat plate is larger than that of the large seat ring;
fourthly, the upper supporting cylinder penetrates through the large seat ring and the effective ring of the second spring, and the upper end face of the upper supporting cylinder is fixedly installed on the lower side surface of the small seat ring; inserting the lower support cylinder package through the small seat ring and the effective ring of the second spring, and fixedly mounting the lower end surface of the lower support cylinder on the upper side surface of the large seat ring;
fifthly, enabling the first spring to penetrate through the upper supporting cylinder and the small seat ring of the second spring, then fixedly mounting the upper end face of the first spring on the lower surface of the upper seat plate, and fixedly mounting the lower end face of the first spring on the upper surface of the lower seat plate;
sixthly, fixedly mounting the upper end face of the lower supporting cylinder on the lower surface of the upper base plate, and fixedly mounting the lower end face of the upper supporting cylinder on the upper surface of the lower base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110877507.5A CN113463505B (en) | 2021-07-31 | 2021-07-31 | Bridge shock insulation support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110877507.5A CN113463505B (en) | 2021-07-31 | 2021-07-31 | Bridge shock insulation support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113463505A CN113463505A (en) | 2021-10-01 |
| CN113463505B true CN113463505B (en) | 2022-10-11 |
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| CN202110877507.5A Active CN113463505B (en) | 2021-07-31 | 2021-07-31 | Bridge shock insulation support |
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| CN113958018B (en) * | 2021-10-25 | 2022-08-23 | 北京交通大学 | Tension-compression unequal-toughness hinge device and assembling method |
| CN114635348A (en) * | 2022-05-11 | 2022-06-17 | 深圳信息职业技术学院 | Anti-seismic device convenient to maintain and used for bridge building |
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| CN113463505A (en) | 2021-10-01 |
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