Continuous beam spherical support

Abstract

The application discloses a continuous beam spherical support, which comprises a lower seat plate, a first groove in the shape of a spherical surface is formed on the upper surface of the lower seat plate, and a first anti-skid plate is arranged on the first groove; an upper seat plate, a second groove in the shape of a spherical surface is formed on the lower surface of the upper seat plate, and a second anti-skid plate is arranged on the second groove; a ball seat, the bottom of the ball seat is abutted on the first anti-skid plate, and the top of the ball seat is abutted in the second anti-skid plate; a plurality of deviation adjusting mechanisms, the plurality of deviation adjusting mechanisms are uniformly arranged around the circumference of the ball seat, the deviation adjusting mechanism comprises a fixed part and a moving part which is in sealing sliding connection with the fixed part, the fixed part is clamped on the lower seat plate, and the moving part is movably abutted on the upper seat plate. The application has the beneficial effects of absorbing seismic energy, reducing the displacement of the support, reducing the size of the support, and improving the smoothness of the line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction engineering, and more particularly to a continuous beam spherical support. BACKGROUND

[0002] In an earthquake, the collapse of a bridge engineering endangers the safety of people on and under the bridge, and after an earthquake, the bridge engineering is destroyed, and the bridge needs to be rebuilt or another traffic route needs to be selected, which greatly weakens the ability of rescue personnel to respond to emergencies, and makes the rescue personnel unable to timely provide emergency rescue and earthquake relief to people in the disaster area, resulting in a large increase in the number of casualties in the earthquake area. The failure of the support under the action of the earthquake is one of the main reasons for the damage of many bridges. At present, the supports widely used in existing bridges in China are mainly plate rubber supports, fixed pot rubber supports, movable pot rubber supports and polytetrafluoroethylene sliding plate supports, and these supports are not designed for seismic purposes and do not have seismic functions when an earthquake occurs. Under the action of the earthquake, the relative displacement between the upper structure and the lower structure is large, which leads to the failure of the support, separates the upper and lower structures, and further causes the displacement of the beam body, the collision of the beam ends, the falling of the beam and the collapse of the bridge. The commonly used seismic isolation supports in China include anti-seismic spherical rigid supports (which can withstand repeated loads during an earthquake and meet the requirements of anti-falling beam), lead rubber supports (which use the plastic deformation of lead to absorb energy) and high-damping rubber supports (which have large hysteresis area and large capacity to absorb seismic energy). Among them, the anti-seismic spherical rigid support can greatly reduce the seismic internal force response of the bridge structure, but at the same time, it will greatly increase the relative displacement of the pier and the beam. However, too large a support displacement will increase the size of the support and require the setting of a large displacement expansion joint to meet the displacement requirement of the beam body, resulting in an increase in cost and affecting the smoothness of the line. SUMMARY

[0003] An object of the present application is to solve at least the above problems and to provide at least the advantages described later.

[0004] To achieve these objects and other advantages in accordance with the present application, a continuous beam spherical support is provided, comprising:

[0005] a lower seat plate having a first recess in the shape of a spherical surface formed on the upper surface thereof, and a first anti-skid plate disposed on the first recess;

[0006] an upper seat plate having a second recess in the shape of a spherical surface formed on the lower surface thereof, and a second anti-skid plate disposed on the second recess;

[0007] a spherical seat having a bottom portion abutting against the first anti-skid plate and a top portion abutting against the second anti-skid plate;

[0008] A plurality of deviation adjustment mechanisms are evenly arranged around the ball seat, each of the deviation adjustment mechanisms having a fixed part and a moving part sealingly and slidingly connected to the fixed part, the fixed part being clamped on the lower seat plate, and the moving part being movably abutted on the upper seat plate.

[0009] Preferably, the fixed part comprises:

[0010] An outer column is embedded and fixed on the lower seat plate, the outer column being hollow;

[0011] An inner column is sleeved in the outer column, the inner column being hollow, and the inner column and the outer column forming an annular cavity;

[0012] A spring is sleeved outside the inner column and located in the annular cavity;

[0013] The moving part comprises:

[0014] An annular sealing head is sealingly and slidingly arranged on the annular cavity, a plurality of first pressing rods being spaced apart on the annular sealing head;

[0015] A cylindrical sealing head is sealingly and slidingly arranged on the inner column, a second pressing rod being arranged on the cylindrical sealing head;

[0016] A connecting plate is fixed on the first pressing rods and the second pressing rod, a receiving groove being formed on the top of the connecting plate, and a third anti-skid plate being arranged on the receiving groove;

[0017] A connecting ball is accommodated in the third anti-skid plate at the bottom and abutted on the upper seat plate at the top;

[0018] The annular cavity and the inner column are each provided with an air inlet pipe, and the air inlet pipe is provided with a valve.

[0019] Preferably, a plurality of limiting grooves are formed on the lower surface of the upper seat plate, a fourth anti-skid plate being arranged on the limiting grooves, and the fourth anti-skid plate being arranged on the top of the connecting ball.

[0020] Preferably, a plurality of limiting rods are arranged around the connecting ball, and the horizontal distance between adjacent two limiting rods is less than the diameter of the connecting ball.

[0021] Preferably, the air pressure in the annular cavity is higher than the air pressure in the inner column.

[0022] Preferably, a pressure detector is arranged in the annular cavity and the inner column to detect the air pressure in the annular cavity and the inner column.

[0023] Preferably, the lower seat plate is provided with a limiting baffle plate on both sides along the longitudinal bridge direction.

[0024] Preferably, the friction coefficient of the first anti-skid plate gradually increases along the radial outward direction, and the friction coefficient of the second anti-skid plate gradually decreases along the radial outward direction.

[0025] Preferably, the curvature of the first groove is smaller than the curvature of the second groove.

[0026] The present application at least includes the following beneficial effects:

[0027] Firstly, the upper and lower groups of friction pairs are formed between the ball seat and the lower seat plate and the upper seat plate. Both the upper and lower sliding surfaces are curved surfaces, which can provide a restoring force by using the load supported by the support to make the support return to the initial equilibrium position.

[0028] Secondly, when the pier and the beam have a relative displacement, i.e., the upper seat plate, the ball seat and the lower seat plate have a slip, the vertical relative distance between the upper seat plate and the lower seat plate gradually decreases, the deviation adjusting mechanism is extruded, and the moving part is extruded and compressed towards the fixed part. Since the slip between the upper seat plate and the lower seat plate is a mixed slip of two curved surfaces, the lateral component force (restoring force) is enhanced, and part of the vertical component force is absorbed by the deviation adjusting mechanism (i.e., the seismic force is absorbed). In combination, the relative displacement distance of the pier and the beam is significantly reduced, the shear damage of the support is not increased, and the defect of excessive relative displacement of the pier and the beam is overcome.

[0029] Other advantages, objects and features of the present application will be partly embodied in the following description, and partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 The figure is a schematic view of the longitudinal bridge side structure of the support according to one of the technical solutions of the present application;

[0031] Fig. 2 The figure is a top view of the lower seat plate according to one of the technical solutions of the present application;

[0032] Fig. 3 The figure is a detail view of the deviation adjusting mechanism according to one of the technical solutions of the present application. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description and the drawings.

[0034] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] like Figs. 1-3 As shown, the meanings of the reference numerals in the attached drawings are as follows: lower seat plate 1, first anti-slip plate 11, upper seat plate 2, ball seat 3, deviation adjustment mechanism 4, outer column 41, inner column 42, annular cavity 43, spring 44, annular sealing head 45, first pressure rod 46, cylindrical sealing head 47, second pressure rod 48, connecting plate 49, connecting ball 40, air inlet pipe 51, limiting rod 52, limiting baffle 5.

[0036] like Figs. 1-3 As shown, the present invention provides a spherical support for a continuous beam, comprising:

[0037] The lower seat plate 1 has a first groove in the shape of a spherical surface on its upper surface. The first anti-slip plate 11 is applied to the first groove. The first anti-slip plate 11 can be made of rubber, polytetrafluoroethylene, etc., to increase the coefficient of friction and improve the friction resistance.

[0038] The upper seat plate 2 has a second groove in the shape of a spherical surface on its lower surface. The second groove is covered with a second anti-slip plate. The second anti-slip plate can be made of rubber, polytetrafluoroethylene, etc., to increase the coefficient of friction and improve the friction resistance.

[0039] The ball seat 3 has its bottom abutting against the first anti-slip plate 11 and its top abutting against the inside of the second anti-slip plate; the ball seat 3 forms two sets of friction pairs with the lower seat plate 1 and the upper seat plate 2. Both upper and lower sliding surfaces are curved surfaces, which can utilize the load borne by the support to provide restoring force, allowing the support to return to its initial equilibrium position. That is, the vertical load borne by the support can be decomposed on the curved surface into a radial component of force towards the equilibrium point, i.e., the restoring force. This can effectively prolong the first natural period of the seismic isolation bridge, especially for bridges with shorter natural periods, where the effect is more obvious. When an earthquake occurs, it can significantly reduce the seismic internal force response at the longitudinal and transverse pier bases of continuous beam bridges. However, it will also significantly increase the relative displacement between the piers and beams, and the longitudinal displacement of the support is significantly greater than the transverse displacement.

[0040] A plurality of deviation adjustment mechanisms 4 are evenly arranged around the circumference of the ball seat 3, each of the deviation adjustment mechanisms 4 has a fixed part and a moving part in sealing sliding connection with the fixed part, the fixed part is clamped on the lower seat plate 1, and the moving part is movably abutted on the upper seat plate 2. The deviation adjustment mechanism 4 is arranged to overcome the defect that the pier and beam have too much relative displacement. When the pier and beam have relative displacement, i.e., the upper seat plate 2, the ball seat 3 and the lower seat plate 1 have slippage, the vertical relative distance between the upper seat plate 2 and the lower seat plate 1 gradually decreases, the deviation adjustment mechanism 4 is extruded, and the moving part is extruded and compressed towards the fixed part. Since the slippage between the upper seat plate 2 and the lower seat plate 1 is a mixed sliding of two curved surfaces, the lateral force (restoring force) is enhanced, and part of the vertical force is also absorbed by the deviation adjustment mechanism 4 (i.e., the earthquake force is absorbed), which comprehensively reduces the relative displacement distance of the pier and beam and does not increase the shear damage of the support. In the above technical solution, two curved surface friction pairs are formed by the upper seat plate 2, the ball seat 3, the lower seat plate 1, the first anti-skid plate 11 and the second anti-skid plate, thereby forming a sliding structure with radial restoring force, which can provide restoring force when the pier and beam have relative displacement, so that the support returns to the original balance position, thereby resisting the damage of the support caused by the earthquake and reducing the collapse of the bridge. The deviation adjustment mechanism 4 is arranged to overcome the defect that the pier and beam have too much relative displacement in the above anti-seismic structure. The interaction between the upper seat plate 2 and the lower seat plate 1 is enhanced, the earthquake force is absorbed by the restoring force and the vertical extrusion force, and the relative displacement distance of the pier and beam is significantly reduced, and the shear damage of the support is not increased.

[0041] In another technical solution, the fixed part comprises:

[0042] An outer column 41 is pre-buried and fixed on the lower seat plate 1, and the outer column 41 is hollow; the outer column 41 is made of steel material and is pre-buried and fixed on the lower seat plate 1, the top of the outer column 41 is open, and the bottom is closed.

[0043] An inner column 42 is sleeved in the outer column 41, the inner column 42 is hollow, and the inner column 42 and the outer column 41 form an annular cavity 43; the inner column 42 is made of steel material and is coaxially fixed in the outer column 41 by welding, and the top is open.

[0044] A spring 44 is sleeved outside the inner column 42 and located in the annular cavity 43;

[0045] The moving part comprises:

[0046] A ring-shaped sealing head 45 is sealingly arranged on the ring-shaped cavity 43, and a plurality of first pressing rods 46 are arranged on the ring-shaped sealing head 45 in a spaced manner; the ring-shaped sealing head 45 adopts a ring-shaped column head, and rubber is coated on the outer surface of the ring-shaped column head to form the ring-shaped sealing head 45. The bottoms of the first pressing rods 46 are welded to the ring-shaped column head through the rubber on the upper surface of the ring-shaped column head. Preferably, three first pressing rods 46 are welded to form a triangular shape, which is more stable.

[0047] A cylindrical sealing head 47 is sealingly arranged on the inner cylinder 42, and a second pressing rod 48 is arranged on the cylindrical sealing head 47; the cylindrical sealing head 47 adopts a column head, and a ring-shaped groove is arranged on the side wall of the column head, and a rubber ring is arranged in the groove to form the cylindrical sealing head 47. The second pressing rod 48 is welded to the column head.

[0048] A connecting plate 49 is fixed to the first pressing rod 46 and the second pressing rod 48, and a containing groove is formed in the top of the connecting plate 49, and a third anti-skid plate is coated on the containing groove; the connecting plate 49 is made of steel, and the first pressing rod 46 and the second pressing rod 48 are welded to the connecting plate 49. The containing groove is in a spherical shape, and the third anti-skid plate is made of rubber plate, polytetrafluoroethylene plate or the like, so as to increase the friction coefficient and improve the friction resistance.

[0049] A connecting ball 40 is arranged in the third anti-skid plate and abuts against the upper seat plate 2; the connecting ball 40 is used to bear the interaction force between the upper seat plate 2 and the lower seat plate 1, and the connecting ball 40 can be limitedly slid and turned in the containing groove, so as to absorb and resolve external forces and stresses in all directions and improve the anti-seismic performance of the whole.

[0050] The ring-shaped cavity 43 and the inner cylinder 42 are provided with air inlet pipes 51, and valves are arranged on the air inlet pipes 51. Holes are formed in the ring-shaped sealing head 45 and the cylindrical sealing head 47, the air inlet pipes 51 are sealingly arranged in the holes and connected with the inside of the ring-shaped cavity 43 and the inner cylinder 42, and then the ring-shaped cavity 43 and the inner cylinder 42 are inflated by using a gas pump, preferably inert gas, so as to form high pressure in the ring-shaped cavity 43 and the inner cylinder 42 and provide a certain pre-supporting force for the upper seat plate 2. The pre-supporting force is set according to the actual bridge and the anti-vibration strength.

[0051] In the above technical solution, the self-weight and the load borne by the upper seat plate 2 are applied on the connecting ball 40, and then transmitted to the first pressing rod 46 and the second pressing rod 48 through the connecting ball 40, so that the ring-shaped sealing head 45 and the cylindrical sealing head 47 compress the spring 44 and the gas. When the borne load changes, the degree of compression of the ring-shaped sealing head 45 and the cylindrical sealing head 47 to the spring 44 and the gas also changes, so that the change of the load is resolved by the deformation of the spring 44 and the change of the gas pressure, the earthquake force is absorbed, the relative displacement distance of the pier and the beam is significantly reduced, and the shear damage of the support is not increased.

[0052] Further, a plurality of limiting grooves are formed on the lower surface of the upper seat plate 2, and a fourth anti-skid plate is arranged on the limiting grooves, and a limiting cover of the fourth anti-skid plate is arranged on the top of the connecting ball 40. The connecting ball 40 is combined more closely with the upper seat plate 2, the free movement range of the connecting ball 40 is limited, and the connecting ball 40 is prevented from separating from the upper seat plate 2.

[0053] Further, a plurality of limiting rods 52 are arranged on the top of the connecting plate 49, and the plurality of limiting rods 52 are arranged circumferentially around the connecting ball 40, and the horizontal distance between two adjacent limiting rods 52 is less than the diameter of the connecting ball 40. The free movement range of the connecting ball 40 is limited, and the connecting ball 40 is prevented from separating from the lower seat plate 1.

[0054] Further, the air pressure in the annular cavity 43 is higher than the air pressure in the inner cylinder 42. When extrusion compression occurs, curved surface sliding is formed between the upper seat plate 2 and the lower seat plate 1, the pressure transmitted to the first pressure rod 46 and the second pressure rod 48 is different, and the first pressure rod 46 close to the ball seat 3 side receives the maximum pressure. Therefore, the air pressure in the annular cavity 43 is higher than the air pressure in the inner cylinder 42 to balance the force difference, and the effect of balancing the upper seat plate 2 and the lower seat plate 1 is achieved.

[0055] Further, the annular cavity 43 and the inner cylinder 42 are both provided with a pressure detector for detecting the air pressure of the annular cavity 43 and the inner cylinder 42. The pressure detector is usually a pressure sensor which can be converted into an electronic signal and cooperate with remote monitoring. The pressure detector can help accurately understand the air pressure of the annular cavity 43 and the inner cylinder 42.

[0056] Further, the lower seat plate 1 is provided with a limiting baffle 5 on both sides in the longitudinal bridge direction. Since the relative displacement of the pier and the beam in the longitudinal bridge direction is obviously greater than the relative displacement in the transverse bridge direction, the limiting baffle 5 is arranged in the longitudinal bridge direction to avoid the phenomenon of beam falling due to excessive longitudinal relative displacement.

[0057] Further, the friction coefficient of the first anti-skid plate 11 gradually increases in the radial outward direction, and the friction coefficient of the second anti-skid plate gradually decreases in the radial outward direction. The first anti-skid plate 11 provides a force to prevent upward sliding, and the gradually increasing friction coefficient is conducive to preventing upward sliding displacement, and when the friction coefficient gradually decreases from the outside to the inside when returning to the central balance point, it is further conducive to sliding balance regression. The second anti-skid plate provides a force to prevent downward sliding, and the gradually decreasing friction coefficient from the inside to the outside can reduce the rigidity of the resistance. When returning, it can be assisted by the top pushing action of the deviation adjusting mechanism 4.

[0058] The first groove has a smaller curvature than the second groove, the upper seat plate 2 will transfer the sliding force of the lower seat plate 1, and the sliding direction is downward, therefore, the first groove on the lower seat plate 1 has a smaller curvature, so that the ball seat 3 and the upper seat plate 2 can be balanced under the action of the restoring force.

[0059] While the embodiments of the application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be applied to various fields suitable for the application, and additional modifications can be easily made by those skilled in the art, and therefore the application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A continuous beam spherical support, characterized by, The utility model relates to a ball joint, which comprises: a lower seat plate, a first concave groove in the shape of a spherical surface is formed on the upper surface of the lower seat plate, and a first anti-skid plate is arranged on the first concave groove; an upper seat plate, a second concave groove in the shape of a spherical surface is formed on the lower surface of the upper seat plate, and a second anti-skid plate is arranged on the second concave groove; a ball seat, the bottom of the ball seat is in abutment with the first anti-skid plate, and the top of the ball seat is in abutment with the second anti-skid plate; a plurality of deviation adjustment mechanisms, the plurality of deviation adjustment mechanisms are uniformly arranged around the ball seat, each deviation adjustment mechanism comprises a fixed part and a moving part which is in sealing sliding connection with the fixed part, the fixed part is clamped on the lower seat plate, and the moving part is in abutment with the upper seat plate; the fixed part comprises: an outer column, which is embedded and fixed on the lower seat plate, the outer column is hollow; an inner column, which is sleeved in the outer column, the inner column is hollow, and the inner column and the outer column form an annular cavity; a spring, which is sleeved outside the inner column and located in the annular cavity; the moving part comprises: a ring-shaped sealing head, which is sealingly and slidingly arranged on the annular cavity, a plurality of first pressing rods are arranged on the ring-shaped sealing head at intervals; a column-shaped sealing head, which is sealingly and slidingly arranged on the inner column, a second pressing rod is arranged on the column-shaped sealing head; a connecting plate, which is fixed on the first pressing rods and the second pressing rod, a receiving groove is formed in the top of the connecting plate, and a third anti-skid plate is arranged on the receiving groove; a connecting ball, which is accommodated in the third anti-skid plate at the bottom and in abutment with the upper seat plate at the top; wherein, the annular cavity and the inner column are both provided with air inlet pipes, and valves are arranged on the air inlet pipes.

2. The continuous beam spherical support of claim 1, wherein a plurality of limiting grooves are formed on the lower surface of the upper seat plate, a fourth anti-skid plate is arranged on the limiting grooves, and a limiting cover is arranged on the top of the connecting ball.

3. The continuous beam spherical seat according to claim 1, wherein a plurality of limiting rods are arranged on the top of the connecting plate and around the connecting ball, and the horizontal distance between adjacent two limiting rods is smaller than the diameter of the connecting ball.

4. The continuous beam spherical seat according to claim 1, wherein The air pressure in the annular cavity is higher than the air pressure in the inner column.

5. The continuous beam spherical seat according to claim 1, wherein pressure detectors are arranged in the annular cavity and the inner column to detect the air pressure in the annular cavity and the inner column.

6. The continuous beam spherical seat according to claim 1, wherein limiting baffles are arranged on the two sides of the lower seat plate along the longitudinal direction.

7. The continuous beam spherical seat according to claim 1, wherein The friction coefficient of the first anti-skid plate gradually increases outward along the radial direction, and the friction coefficient of the second anti-skid plate gradually decreases outward along the radial direction.

8. The continuous beam spherical seat according to claim 1, wherein The curvature of the first concave groove is smaller than the curvature of the second concave groove.

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