Bridge dynamic load damping and anti-seismic device

Abstract

The application provides a bridge dynamic load damping and anti-seismic device, which comprises primary damping, secondary damping and tertiary damping; the primary damping comprises a steel top plate, a combined elastic support and a fixed steel plate, the combined elastic support comprises a filling layer and a'mouth' shaped rubber block, two damping steel plate groups are arranged in the filling layer; the secondary damping comprises a stainless steel base, a cylindrical steel pipe body and a damping viscous damper, the fixed steel plate and the outer surface of the stainless steel base are provided with baffles, the baffles are provided with fixed bolts in a rectangular array, and the baffles are provided with elliptical bolt holes corresponding to the positions of the fixed bolts on the upper sides of the baffles; the tertiary damping comprises a rubber pad and a steel bottom plate; the device is provided with the tertiary damping, and the damping effect on the bridge is better; the elliptical bolt holes are arranged on the baffles, the condition of the anti-seismic and damping device can be directly observed from the outside, so that the internal components can be replaced, the baffles can be detached, the replacement of the components is more convenient, and the service life of the anti-seismic and damping device can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge load, in particular to a bridge dynamic load damping and anti-seismic device. BACKGROUND

[0002] The bridge is an important traffic hub connecting cities, regions and countries, and its importance is self-evident. However, the bridge needs to face various factors affecting the bridge, such as earthquakes, wind and sand, etc. Among them, the earthquake is the most serious challenge to the bridge. After the earthquake, the bridge may collapse, crack and other serious conditions, causing unpredictable personnel casualties and economic losses.

[0003] Bridge dynamic load damping and anti-seismic technology refers to introducing damping equipment between the bridge and the column to improve the response of the bridge under the action of dynamic load such as vehicle driving and wind force, and to improve the anti-seismic performance and service life of the bridge. This technology not only protects the bridge, but also reduces the cost of building new bridges. Especially now most bridges are built in earthquake zones, and the design difficulty and construction cost of the bridge are very high. If there is no good damping and anti-seismic ability, the bridge is difficult to survive in earthquakes and other natural disasters. Therefore, the bridge damping technology plays a very important role in ensuring the safety of the bridge and reducing disaster losses.

[0004] The existing bridge damping device only plays a supporting and damping role in the vertical direction of the bridge, and the device is complex, difficult to construct and high in cost.

[0005] A highway bridge buffer damping device is disclosed in Chinese patent application No. CN201621253916.9, which comprises a support plate connected with the bridge and a support base connected with the pier. The lower side of the support plate is provided with a plurality of upper fixing blocks, and the upper side of the support base is provided with a plurality of lower fixing blocks vertically corresponding to the upper fixing blocks. A support spring is arranged between the upper fixing block and the lower fixing block. The lower side of the support plate is provided with a support column at both ends, and the upper side of the support base is provided with an outer sleeve vertically corresponding to the support column at both ends. An inner sleeve is slidably sleeved on the support column between the first annular flange and the second annular flange. The outer side of the annular groove and the inner wall of the outer sleeve are filled with elastic material.

[0006] Although the structure of the invention is stable and reliable, and has a certain protective effect on the bridge structure, the device structure is complex and difficult to construct. When an earthquake occurs, the bridge not only bears vertical force but also horizontal force, causing the prefabricated bridge plate to displace horizontally and vertically. When the displacement exceeds the resting width of the prefabricated bridge plate on the pier, the bridge has no anti-overturning device at this time, which is easy to cause overturning accidents, not only the bridge is damaged, but also the pedestrians and vehicles on and under the bridge will have major safety accidents. SUMMARY

[0007] The present application aims to provide a bridge dynamic load damping and anti-seismic device, which can solve the problems of complex structure, difficult installation and inability to directly observe the bearing limit of the device from the outside of the traditional bridge damping device.

[0008] To this end, the technical scheme adopted by the present application is as follows: a bridge dynamic load damping and anti-seismic device, comprising a first-stage damping, a second-stage damping and a third-stage damping arranged in sequence from top to bottom between a bridge body and a pier column;

[0009] The first-stage damping comprises a rectangular steel top plate pre-buried at the bottom of the bridge body, a combined elastic support arranged below the steel top plate, and a fixed steel plate arranged below the combined elastic support, the combined elastic support comprises a filler layer arranged directly below the middle part of the steel top plate and a "mouth" shaped rubber block surrounding the filler layer, two damping steel plate groups are symmetrically arranged in the filler layer, and the combined elastic support and the fixed steel plate are fastened to the steel top plate by screws;

[0010] The second-stage damping comprises a stainless steel base arranged below the fixed steel plate, a cylindrical steel pipe body arranged on the stainless steel base, and four damping viscous dampers arranged in a rectangular array around the cylindrical steel pipe body, the upper end of the damping viscous damper is located at the intersection of the top corner of the filler layer and the "mouth" shaped rubber block, a limiting groove for installing the damping viscous damper is formed on the stainless steel base, the outer surfaces of the fixed steel plate and the stainless steel base are provided with baffles, the baffles are provided with fixed bolts in a rectangular array, the fixed bolts on the upper side of the baffles are connected with the "mouth" shaped rubber block, the fixed bolts on the lower side of the baffles are connected with the stainless steel base, and the baffles are provided with oval bolt holes corresponding to the positions of the fixed bolts on the upper side of the baffles;

[0011] The third-stage damping comprises a rubber pad arranged below the stainless steel base and a steel bottom plate pre-buried at the top of the bridge pier column, and the rubber pad is fastened to the steel bottom plate by screws.

[0012] As a preferred embodiment of the above-mentioned scheme, the damping medium of the damping viscous damper is ferrofluid. The damping viscous damper using ferrofluid as the damping medium has a small volume and is easy to install and replace.

[0013] Further preferably, the outer surface of the damping viscous damper is sleeved with a buffer spring. The buffer spring sleeved on the outer surface of the damping viscous damper improves the damping capacity.

[0014] Further preferably, the baffles are made of stainless steel. The baffles made of stainless steel can better protect the cylindrical steel pipe body and the damping viscous damper in the second-stage damping.

[0015] Further preferably, the rubber pad is a GJZF4 rubber pad. The GJZF4 rectangular rubber support is a four-fluorine sliding plate type support, which is not limited by the shear deformation amount of the support itself and can meet the large displacement requirement of some bridges.

[0016] Further preferably, the stainless steel base, the rubber pad and the steel bottom plate are all bonded by epoxy resin. The cohesive strength of the epoxy cured product is large, and the adhesive strength is high.

[0017] The beneficial effects of the present application are:

[0018] (1) The shock absorption and shock resistance device is provided with primary, secondary and tertiary shock absorptions. When the pressure applied downward by the bridge above is received, the pressure received by the shock absorption steel plate group in the primary shock absorption is dispersed to both sides, and the pressure on both sides is transmitted downward to the shock absorption viscous damper. The shock absorption viscous damper is arranged at the intersection of the four corners of the filling layer and the "mouth" shaped rubber block, can uniformly receive the pressure dispersed and transmitted by the shock absorption steel plate group, and is more uniformly stressed. After the shock absorption by the shock absorption viscous damper, the pressure is transmitted to the rubber pad below for shock absorption, and the tertiary shock absorption has better shock absorption effect on the bridge.

[0019] (2) The baffle of the secondary shock absorption is provided with an oval bolt hole corresponding to the position of the upper side fixed bolt. When the primary shock absorption above is deformed by the impact of force, the bolt connected to the "mouth" shaped rubber block will change position together. In other words, the position of the bolt on the screw hole moves downward. When it moves to the lowermost position, the bearing capacity of the shock absorption and shock resistance device at this time reaches the limit, so as to replace the shock absorption parts in time.

[0020] (3) The baffle is arranged to be bolted between the "mouth" shaped rubber block and the stainless steel base, which is convenient to disassemble. When the shock absorption viscous damper inside needs to be replaced or repaired, the baffle is disassembled, and the jack is arranged on the stainless steel base to support the fixed steel plate above, and then the shock absorption viscous damper is replaced. The internal parts are replaced regularly, and the service life is longer. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0022] Fig. 1 is a structural diagram of the present application.

[0023] Fig. 2 is an internal structure diagram of the present application.

[0024] Fig. 3 is a perspective view (top view state) of the present application. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings and examples.

[0026] As Figs. 1-3 The bridge dynamic load damping and shock resistance device mainly comprises a first-stage damping, a second-stage damping and a third-stage damping arranged in sequence from top to bottom between a bridge body and a pier column.

[0027] The first-stage damping is composed of a rectangular steel top plate 1 embedded in the bottom of the bridge body, a combined elastic support arranged below the steel top plate 1 and a fixed steel plate 2 arranged below the combined elastic support. The combined elastic support is composed of a filler layer 3 arranged directly below the middle part of the steel top plate 1 and a "mouth-shaped" rubber block 4 surrounding the filler layer 3. Two damping steel plate groups 5 are symmetrically arranged in the filler layer 3. The damping steel plate groups 5 disperse the pressure transmitted from the bridge above, and the dispersed pressure is transmitted to both sides below the damping steel plate groups 5, thereby reducing the pressure received by the first-stage damping. The combined elastic support and the fixed steel plate 2 are fastened to the steel top plate 1 by screws 6, which makes the connection more convenient.

[0028] The second-stage damping is composed of a stainless steel base 7 arranged below the fixed steel plate 2, a cylindrical steel pipe body 8 arranged on the stainless steel base 7 and four damping viscous dampers 9 arranged in a rectangular array around the cylindrical steel pipe body 8. The cylindrical steel pipe body 8 provides support, and the damping viscous dampers 9 receive the pressure transmitted from the damping steel plate groups 5 above, slow down the transmitted vibration and consume it, thereby further reducing the pressure transmitted downward. The damping medium of the damping viscous dampers 9 is ferromagnetic fluid. The damping viscous dampers 9 using ferromagnetic fluid as the damping medium have a small volume and are easy to install and replace.

[0029] A buffer spring 16 is sleeved on the outer surface of the damping viscous damper 9. The buffer spring 16 sleeved on the outer surface of the damping viscous damper 9 can further receive the pressure transmitted from above and improve the damping capacity according to the characteristics of the spring itself. The upper end of the damping viscous damper 9 is located at the junction of the top corner of the filler layer 3 and the "mouth-shaped" rubber block 4, which can better receive the pressure transmitted from above and support the filler layer 3 and the "mouth-shaped" rubber block 4 above. Limiting grooves 10 for installing the damping viscous dampers 9 are formed on the stainless steel base 7. The limiting grooves 10 facilitate positioning of the damping viscous dampers 9 during replacement or maintenance and facilitate installation.

[0030] The outer surface of the fixed steel plate 2 and the stainless steel base 7 is provided with a baffle 11 made of stainless steel. The baffle 11 made of stainless steel can better protect the cylindrical steel pipe body 8 and the damping viscous damper 9 in the secondary damping. The baffle 11 is provided with fixed bolts 12 arranged in a rectangular shape. The fixed bolts 12 on the upper side of the baffle 11 are connected with the "mouth"-shaped rubber block 4, and the fixed bolts 12 on the lower side of the baffle 11 are connected with the stainless steel base 7. An oval bolt hole 13 corresponding to the position of the fixed bolts 12 on the upper side of the baffle 11 is formed on the baffle 11, and the fixed bolts 12 on the upper side of the baffle 11 are connected to the rubber block 4. When the primary damping deforms or displaces due to the vibration of the bridge, the position of the fixed bolts 12 will change accordingly. By observing the position of the fixed bolts 12 on the oval bolt hole, the pressure bearing degree of the damping and shock resisting device can be determined, and it can be determined whether to replace the damping viscous damper 9 in the secondary damping. The condition of the damping and shock resisting device can be observed externally, which is safer and more convenient.

[0031] The tertiary damping is composed of a rubber pad 14 arranged below the stainless steel base 7 and a steel bottom plate 15 embedded in the top of the bridge pier column. The rubber pad 14 is fastened to the steel bottom plate 15 by the screw 6. The rubber pad 14 is a GJZF4 rubber pad. The GJZF4 rectangular rubber support is a four-fluorine sliding plate support. The low friction coefficient between the GJZF4 rubber pad 14 and the stainless steel base 7, the horizontal displacement of the upper structure, and the limitation of the shear deformation amount of the support itself can meet the large displacement requirement of some bridges. In addition, the support has the characteristics of simple structure, low price, no maintenance, easy replacement, shock absorption, low building height, etc. The stainless steel base 7, the rubber pad 14 and the steel bottom plate 15 are all bonded by epoxy resin. The cohesive strength of the epoxy cured product is large, and the adhesive strength is high.

[0032] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A bridge dynamic load shock absorption and shock resistance device, characterized in that, The first-stage damping, the second-stage damping and the third-stage damping are sequentially arranged between the bridge body and the pier from top to bottom; The first-stage damping comprises a rectangular steel top plate (1) embedded in the bottom of the bridge body, a combined elastic support arranged below the steel top plate (1), and a fixed steel plate (2) arranged below the combined elastic support, the combined elastic support comprises a filler layer (3) arranged directly below the middle part of the steel top plate (1) and a "mouth-shaped" rubber block (4) surrounding the filler layer (3), two damping steel plate groups (5) are symmetrically arranged in the filler layer (3) in transverse direction, and the combined elastic support and the fixed steel plate (2) are fastened to the steel top plate (1) by screws (6); The second-stage damping comprises a stainless steel base (7) arranged below the fixed steel plate (2), a cylindrical steel pipe body (8) arranged on the stainless steel base (7), and four damping viscous dampers (9) arranged in a rectangular array around the cylindrical steel pipe body (8), the upper end of the damping viscous damper (9) is located at the junction of the top corner of the filler layer (3) and the "mouth-shaped" rubber block (4), the stainless steel base (7) is provided with a limiting groove (10) for installing the damping viscous damper (9), the outer surface of the fixed steel plate (2) and the stainless steel base (7) is provided with a baffle (11), the baffle (11) is provided with fixed bolts (12) arranged in a rectangular array, the fixed bolts (12) on the upper side of the baffle (11) are connected with the "mouth-shaped" rubber block (4), the fixed bolts (12) on the lower side of the baffle (11) are connected with the stainless steel base (7), and the baffle (11) is provided with an oval bolt hole (13) corresponding to the position of the fixed bolts (12) on the upper side of the baffle (11). The third-stage damping comprises a rubber pad (14) arranged below the stainless steel base (7) and a steel bottom plate (15) embedded in the top of the bridge pier, and the rubber pad (14) is fastened to the steel bottom plate (15) by screws (6).

2. The dynamic load damping and shock resistance device for bridges as set forth in claim 1, characterized in that, The damping medium of the damping viscous damper (9) is ferromagnetic fluid.

3. The dynamic load damping and shock resistance device for bridges as defined in claim 1, characterized in that The damping viscous damper (9) is sleeved with a buffer spring (16) on the outer surface.

4. The dynamic load damping and shock resistance device for bridges as defined in claim 1, wherein The material of the baffle (11) is stainless steel.

5. The dynamic load damping and shock resistance device for bridges as defined in claim 1, wherein The rubber pad (14) is a GJZF4 rubber pad (14).

6. The dynamic load damping and shock resistance device for bridges as defined in claim 5, wherein The stainless steel base (7), the rubber pad (14) and the steel bottom plate (15) are bonded by epoxy resin.

Images