CN112962425A - Bridge shock absorber - Google Patents
Bridge shock absorber Download PDFInfo
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- CN112962425A CN112962425A CN202110179129.3A CN202110179129A CN112962425A CN 112962425 A CN112962425 A CN 112962425A CN 202110179129 A CN202110179129 A CN 202110179129A CN 112962425 A CN112962425 A CN 112962425A
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- hoop
- arc piece
- bridge
- semicircular arc
- outer hoop
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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
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge damper, which comprises an inner hoop, an outer hoop, a damping bracket and a flange ring, wherein the inner hoop and the outer hoop are formed by splicing a left semicircular arc piece and a right semicircular arc piece; the left semi-arc piece of the inner hoop, the left semi-arc piece of the outer hoop, the right semi-arc piece of the inner hoop and the right semi-arc piece of the outer hoop are connected into a whole through a damping bracket; the flange ring is vertically fixed on the top end of the outer hoop. The invention discloses a bridge shock absorber which can meet the requirement of support replacement, has better energy consumption capability, can respond to the displacement of a beam body by 360 degrees, enables a sliding pier to participate in cooperative anti-seismic, is beneficial to preventing the beam body from sliding off, and is suitable for the new construction and anti-seismic reinforcement of railway bridges, highway bridges, urban viaducts and various continuous bridge bridges.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a bridge damper.
Background
In order to reduce the seismic response of the continuous beam bridge and improve the seismic performance of the continuous beam bridge, shock absorption measures such as shock absorption and isolation supports and viscous dampers are generally adopted for the continuous beam bridge, such as lead core rubber supports and viscous dampers. However, for the existing pier column continuous beam bridge, when seismic isolation and reduction supports are used for seismic reinforcement, a beam body needs to be jacked up, and construction is inconvenient. For newly-built bridges, the problems of difficulty in maintenance and replacement can be met by using the seismic isolation support, and the difficulty in support replacement can be increased by using the viscous damper.
On the other hand, the seismic capacity of the conventional continuous beam bridge is mainly borne by the fixed piers, the vibration reduction and isolation support has weak displacement response control on the continuous beam, particularly the transverse displacement response of the bridge increases the trend of transverse sliding of the beam body, and further has the risk of sliding.
Disclosure of Invention
The invention aims to provide a bridge shock absorber, which is used for solving the problems that the shock absorption and isolation support increases the difficulty of support maintenance and replacement, and the existing shock absorption and isolation support does not have the function of preventing a beam body from sliding down.
The invention provides a bridge damper, which comprises an inner hoop, an outer hoop, a damping bracket and a flange ring, wherein the inner hoop and the outer hoop are formed by splicing a left semicircular arc piece and a right semicircular arc piece; the left semi-arc piece of the inner hoop, the left semi-arc piece of the outer hoop, the right semi-arc piece of the inner hoop and the right semi-arc piece of the outer hoop are connected into a whole through the damping bracket; the flange ring is vertically fixed at the top end of the outer hoop;
the flange ring is fixed on the bottom surface of the beam body above the support through bolts; the inner hoop surrounds the outer side of the bridge pier and a telescopic gap is reserved between the inner hoop and the bridge pier.
Preferably, the outer ring of the top end of the left semicircle component and the right semicircle component of the outer ring band protrudes outwards to form a flange, and when the left semicircle component and the right semicircle component of the outer ring band are spliced to form a circle, the flange of the left semicircle component of the outer ring band and the flange of the right semicircle component of the outer ring band form a circle to form the flange ring.
Preferably, the two ends of the left semicircular arc piece and the right semicircular arc piece of the inner hoop are respectively provided with an inner splicing head, and the inner splicing head of the left semicircular arc piece and the inner splicing head of the right semicircular arc piece of the inner hoop are connected through a bolt; the outer hoop is characterized in that outer splices are respectively arranged at two ends of the left semi-circular arc piece and the right semi-circular arc piece of the outer hoop, and the outer splices of the left semi-circular arc piece and the outer splices of the right semi-circular arc piece of the outer hoop are connected through bolts.
Preferably, the shock absorbing bracket is formed by a corrugated plate or a broken line plate which is surrounded along a gap between the inner hoop and the outer hoop, and the shock absorbing bracket is fixedly connected with the inner hoop and the outer hoop.
Preferably, the shock absorber support includes buckled plate shock absorber support and broken line board shock absorber support, the buckled plate shock absorber support with broken line board shock absorber support all can be connected fixedly with inner ring hoop and outer ring hoop through bolted connection or welded mode.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a bridge shock absorber, which is independent of a support, and because a flange ring is connected with a beam body by adopting a detachable bolt, and an inner hoop does not interact with a pier, when the support needs to be replaced and maintained, the support only needs to unscrew the bolt for connecting the flange ring and the beam body, and structural members such as an inner hoop, an outer hoop and the like are dismounted, and meanwhile, the convenience of dismounting and replacing the shock absorber is improved; when the bridge damper is applied to new construction or reinforcement of an old bridge, a beam body does not need to be jacked up, so that the construction difficulty is reduced; the damping bracket can achieve good energy dissipation and damping effects through self reciprocating deformation under the action of an earthquake; the reserved telescopic gap can enable the displacement of the beam body caused by the effects of temperature load and the like to be released during normal use, and the inner hoop surrounds the whole bridge pier during earthquake, so that the bridge shock absorber can control the displacement response of the beam body by 360 degrees to prevent the beam body from sliding. The invention discloses a bridge shock absorber which can meet the requirement of support replacement, has better energy consumption capability, can respond to the displacement of a beam body by 360 degrees, is beneficial to preventing the beam body from sliding off, and is suitable for the new construction and seismic reinforcement of railway bridges, highway bridges, urban viaducts and various continuous bridge bridges.
Drawings
Fig. 1 is a schematic perspective view of a bridge shock absorber according to an embodiment 1 of the present invention in an applied state;
FIG. 2 is a longitudinal half sectional view of a beam body in an application state of a bridge damper provided in embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view of a beam in a bridge damper application state according to embodiment 1 of the present invention;
FIG. 4 is a top view of a bridge damper according to embodiment 1 of the present invention in an applied state;
FIG. 5 is a top view of a bridge damper provided in accordance with embodiment 1 of the present invention;
FIG. 6 is a top view of a bridge damper provided in example 1 of the present invention when the damping mount is a corrugated plate damping mount;
FIG. 7 is a front view of a bridge damper provided in example 1 of the present invention when the damping mount is a corrugated plate damping mount;
fig. 8 is a top view of a bridge shock absorber provided in embodiment 1 of the present invention when the shock absorbing bracket is a broken-line plate shock absorbing bracket.
Description of reference numerals: 11-beam body, 12-support, 13-pier, 21-inner hoop, 22-outer hoop, 23-flange ring, 24-outer splicing joint, 25-inner splicing joint, 26-corrugated plate damping support and 27-broken line plate damping support.
Detailed Description
The invention provides a bridge shock absorber which is convenient to assemble and replace, convenient to transport and low in manufacturing cost, and the bridge shock absorber can overcome the defects and shortcomings of the existing shock absorption and isolation devices and technologies when used in a continuous beam bridge; when a new bridge or an old bridge is subjected to seismic reinforcement, the support can be conveniently replaced due to the characteristics of detachable assembly and mutual independence with the support; when an earthquake happens suddenly, the hoop damping device has good energy dissipation and damping and 360-degree limiting functions, so that the bridge piers participate in cooperative earthquake resistance, the displacement response of the bridge under the earthquake action is reduced, a new design concept and technical guarantee are provided for the design and reinforcement of a continuous beam bridge, and the hoop damping device is suitable for the design of a new bridge or the earthquake resistance reinforcement of an old bridge.
Example 1
Referring to fig. 1 to 4, the bridge damper for installation at a junction between a pier 13 and a girder 11 includes an inner hoop 21, an outer hoop 22, a damping bracket and a flange ring 23, the inner hoop 21 and the outer hoop 22 are connected to each other by the damping bracket, the flange ring 23 is vertically fixed to a top end of the outer hoop 22,
wherein, the bridge pier 13 and the beam body 11 are provided with a support 12,
the flange ring 23 is fixed on the bottom surface of the beam body 11 above the support 12 through bolts;
the inner hoop 21 surrounds the outer side of the pier 13 and reserves a telescopic gap with the pier 13 for shock absorption.
In a specific embodiment, the outer rings of the top ends of the left and right semicircular arc members of the outer hoop 22 protrude outward to form flanges, and when the left and right semicircular arc members of the outer hoop 22 are joined together to form a circle, the flanges of the left semicircular arc member of the outer hoop 22 and the flanges of the right semicircular arc member of the outer hoop 22 form a circle to form the flange ring 23.
Referring to fig. 4 to 7, the inner hoop 21 and the outer hoop 22 are formed by splicing a left semicircular arc member and a right semicircular arc member. As a specific embodiment, the inner splicing heads 25 are respectively arranged at two ends of the left semicircular arc piece and the right semicircular arc piece of the inner hoop 21, and the inner splicing head 25 of the left semicircular arc piece and the inner splicing head 25 of the right semicircular arc piece of the inner hoop 21 are connected through a bolt; the two ends of the left semicircular arc piece and the right semicircular arc piece of the outer hoop 22 are respectively provided with an outer splicing head 24, and the outer splicing head 24 of the left semicircular arc piece and the outer splicing head 24 of the right semicircular arc piece of the outer hoop 22 are connected through bolts.
Referring to fig. 5 and 8, the damping bracket is formed by surrounding corrugated plates or broken line plates along a gap between the inner hoop 21 and the outer hoop 22, and includes a corrugated plate damping bracket 26 and a broken line plate damping bracket 27, and both the corrugated plate damping bracket 26 and the broken line plate damping bracket 27 can be connected and fixed with the inner hoop 21 and the outer hoop 22 by means of bolts or welding.
As a specific application example, referring to fig. 1 to 4, the abutment 12 is installed on the top of the pier 13, and the girder 11 is lowered on the abutment 12. When the bridge shock absorber disclosed by the invention is applied, attention needs to be paid to the following parts:
first, before the beam body 11 is poured, a plurality of nuts are embedded near the position of the bottom surface mounting bracket 12 of the beam body 11, and the position pitches of the nuts correspond to the bolt holes on the flange ring 23 one by one.
Secondly, before the bridge damper is installed, the left and right semi-circular arc members of the outer hoop 22 with the flange and the left and right semi-circular arc members of the inner hoop 21 are all produced in a factory, and then the corrugated plate damping bracket 26 or the broken line plate damping bracket 27, the inner hoop 21 and the outer hoop 22 are assembled in advance in the factory through bolting or welding to form a left semi-circular arc prefabricated component and a right semi-circular arc prefabricated component, as shown in fig. 6 and 7.
Finally, when in on-site assembly, the left half-arc prefabricated part and the right half-arc prefabricated part are butted and assembled into a whole, the top end of the outer hoop 22 is flush with the bottom of the beam body 11, and the flange ring 23 is fixed with a nut pre-embedded in the beam body 11 by a bolt; meanwhile, the top end of the inner hoop 21 is flush with the top of the pier 13, and a telescopic gap is reserved between the inner hoop 21 and the pier 13 so as to meet the requirement of beam deformation caused by the action of bearing temperature load and the like;
in a normal use state, the support 12 bears the vertical force of the beam body 11, and the expansion deformation of the beam body 11 under the load action of temperature and the like can be released through the expansion gap reserved between the inner hoop 21 and the pier 13 without the action of the bridge shock absorber.
When the beam body 11 encounters an earthquake suddenly, a large relative displacement occurs between the beam body 11 and the support 12, and when the relative displacement exceeds the telescopic clearance, the bridge shock absorber starts to act, which is mainly represented by: firstly, the beam body 11 drives the corrugated plate damping support 26 or the broken line plate damping support 27 to move relative to the pier 13, one side of the corrugated plate damping support 26 or the broken line plate damping support 27 is extruded, and the other side of the corrugated plate damping support 26 or the broken line plate damping support 27 is stretched to generate large deformation and reciprocating deformation, so that a large amount of energy is consumed, and the energy dissipation and damping effects can be achieved; secondly, since the inner hoop 21 surrounds the entire bridge pier 13, the bridge damper can control the displacement response of the girder body by 360 degrees to prevent the girder body 11 from slipping off. The reason is that: with the relative displacement between the beam body 11 and the abutment 12 gradually increasing, the distance between the inner hoop 21 and the pier 13 becomes closer until the inner hoop 21 directly acts on the pier 13, so that the direct relative sliding between the beam body 11 and the abutment 12 is restricted, and the tendency that the beam body 11 slides off the pier 13 is suppressed.
When the support 12 needs to be repaired or replaced, the bridge damper can be detached only by unscrewing the bolts of the outer splicing head 24 and the inner splicing head 25 respectively and then unscrewing the flange ring 23 of the outer hoop 22 and the bolt of the beam body 11, so that the support 12 is convenient to replace.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. A bridge shock absorber is arranged at the joint of a bridge pier (13) and a beam body (11), and is characterized by comprising an inner hoop (21), an outer hoop (22), a shock absorption bracket and a flange ring (23),
the inner hoop (21) and the outer hoop (22) are formed by splicing a left semicircular arc piece and a right semicircular arc piece; the left semi-arc piece of the inner hoop (21), the left semi-arc piece of the outer hoop (22), the right semi-arc piece of the inner hoop (21) and the right semi-arc piece of the outer hoop (22) are connected into a whole through the damping bracket;
the flange ring (23) is vertically fixed at the top end of the outer hoop (22);
wherein the flange ring (23) is fixed on the bottom surface of the beam body (11) above the support (12) through bolts;
the inner hoop (21) surrounds the outer side of the pier (13) and a telescopic gap is reserved between the inner hoop and the pier (13).
2. The bridge shock absorber of claim 1,
the outer ring of the top end of the left semicircle component and the top end of the right semicircle component of the outer hoop (22) protrude outwards to form a flange, and when the left semicircle component and the right semicircle component of the outer hoop (22) are spliced to form a circle, the flange of the left semicircle component of the outer hoop (22) and the flange of the right semicircle component of the outer hoop (22) are looped to form the flange ring (23).
3. The bridge shock absorber of claim 1,
the inner splicing heads (25) are respectively arranged at two ends of the left semicircular arc piece and the right semicircular arc piece of the inner hoop (21), and the inner splicing heads (25) of the left semicircular arc piece and the inner splicing heads (25) of the right semicircular arc piece of the inner hoop (21) are connected through bolts; the two ends of the left semicircular arc piece and the right semicircular arc piece of the outer hoop (22) are respectively provided with an outer splicing head (24), and the outer splicing head (24) of the left semicircular arc piece and the outer splicing head (24) of the right semicircular arc piece of the outer hoop (22) are connected through a bolt.
4. The bridge shock absorber of claim 1,
the shock absorption support is formed by a corrugated plate or a broken line plate in a surrounding mode along a gap between an inner hoop (21) and an outer hoop (22), and the shock absorption support is fixedly connected with the inner hoop (21) and the outer hoop (22).
5. The bridge shock absorber of claim 4,
the shock absorption support comprises a corrugated plate shock absorption support (26) and a broken line plate shock absorption support (27), wherein the corrugated plate shock absorption support (26) and the broken line plate shock absorption support (27) can be fixedly connected with an inner hoop (21) and an outer hoop (22) in a bolt connection or welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110179129.3A CN112962425A (en) | 2021-02-08 | 2021-02-08 | Bridge shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110179129.3A CN112962425A (en) | 2021-02-08 | 2021-02-08 | Bridge shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112962425A true CN112962425A (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110179129.3A Pending CN112962425A (en) | 2021-02-08 | 2021-02-08 | Bridge shock absorber |
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| Country | Link |
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| CN (1) | CN112962425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818339A (en) * | 2021-10-29 | 2021-12-21 | 同济大学 | Steel damping shock absorption anti-falling beam support |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2689152A1 (en) * | 1992-03-27 | 1993-10-01 | Diffusion Regionale Locale Sa | Flexible motorway sign which flattens on vehicle impact - is U-shaped on plan open end facing traffic sloping sides with shoe in plate plastic shape retaining cords tie side ends |
| CN205444112U (en) * | 2016-02-19 | 2016-08-10 | 封强 | Bridge protection device |
| CN206157558U (en) * | 2016-08-01 | 2017-05-10 | 中铁第一勘察设计院集团有限公司 | Long united nations general assembly strides continuous bridge attenuator and subtracts isolation bearing and unites structure |
| CN206337526U (en) * | 2016-12-12 | 2017-07-18 | 中铁二十局集团第三工程有限公司 | A kind of anticollision device of pier based on foamed aluminium |
| CN109797688A (en) * | 2019-01-28 | 2019-05-24 | 广州大学 | A kind of highway bridge pier anticollision device, collision-prevention device |
-
2021
- 2021-02-08 CN CN202110179129.3A patent/CN112962425A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2689152A1 (en) * | 1992-03-27 | 1993-10-01 | Diffusion Regionale Locale Sa | Flexible motorway sign which flattens on vehicle impact - is U-shaped on plan open end facing traffic sloping sides with shoe in plate plastic shape retaining cords tie side ends |
| CN205444112U (en) * | 2016-02-19 | 2016-08-10 | 封强 | Bridge protection device |
| CN206157558U (en) * | 2016-08-01 | 2017-05-10 | 中铁第一勘察设计院集团有限公司 | Long united nations general assembly strides continuous bridge attenuator and subtracts isolation bearing and unites structure |
| CN206337526U (en) * | 2016-12-12 | 2017-07-18 | 中铁二十局集团第三工程有限公司 | A kind of anticollision device of pier based on foamed aluminium |
| CN109797688A (en) * | 2019-01-28 | 2019-05-24 | 广州大学 | A kind of highway bridge pier anticollision device, collision-prevention device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818339A (en) * | 2021-10-29 | 2021-12-21 | 同济大学 | Steel damping shock absorption anti-falling beam support |
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