CN110894706B - Pulley type bridge damping structure - Google Patents
Pulley type bridge damping structure Download PDFInfo
- Publication number
- CN110894706B CN110894706B CN201911411870.7A CN201911411870A CN110894706B CN 110894706 B CN110894706 B CN 110894706B CN 201911411870 A CN201911411870 A CN 201911411870A CN 110894706 B CN110894706 B CN 110894706B
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- pulley
- annular
- main beam
- force transmission
- reset
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- 238000013016 damping Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 12
- 230000035939 shock Effects 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 210000004177 elastic tissue Anatomy 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a pulley type bridge damping structure which comprises a force transmission part arranged at the bottom of a main beam and damping reset parts arranged between a pair of support stones on a bent cap, wherein the middle parts of the damping reset parts are correspondingly arranged at intervals with the force transmission parts, and when the main beam drives the force transmission parts to transversely or longitudinally displace, the force transmission parts interact with the damping reset parts so as to reset the main beam. The invention has simple structure, low cost, rapid construction, convenient maintenance and replacement, can limit the transverse/longitudinal displacement of the girder, can automatically reset the girder, effectively prolongs the service life of the bridge, ensures the traffic safety of people and vehicles, and has good engineering application prospect.
Description
Technical Field
The invention relates to the technical field of bridge shock resistance and vibration reduction, in particular to a pulley type bridge vibration reduction structure.
Background
Along with the development of highway bridge technology, the requirements on bridge shock absorption are higher and higher, and particularly in areas with frequent earthquakes, the bridge shock absorption is important. When the earthquake happens, if enough anti-seismic or shock absorption measures are not available, the upper main beam is subjected to larger transverse displacement, so that the upper main beam is damaged, and the risk of beam falling exists in severe cases, and the driving safety of vehicles on the bridge is directly threatened. The existing bridge damping structure mainly takes the aspect of restraining the transverse displacement of the main girder into consideration, and can limit the transverse displacement of the main girder to a certain extent; once an earthquake occurs, the girder cannot recover the original position after the girder moves transversely, and the subsequent use of the bridge is affected to a certain extent. To some extent, the bridge in which the main beam is displaced is a potential safety hazard.
Disclosure of Invention
The invention provides a pulley type bridge damping structure, and aims to solve the problem that the existing bridge damping structure can only limit the transverse displacement of a girder and cannot enable the girder to return independently.
In order to achieve the above purpose, the present invention may adopt the following technical scheme:
The pulley type bridge shock absorption structure of the invention comprises
The force transmission part is arranged at the bottom of the main beam;
The damping reset parts are arranged between the paired support cushion stones on the bent cap;
The middle part of the damping reset part is arranged at intervals corresponding to the force transmission part, and when the main beam drives the force transmission part to transversely or longitudinally displace, the force transmission part and the damping reset part interact to reset the main beam.
The force transmission part is a group of horizontal rotary wheels which are respectively connected with the main beam through pre-buried rotating shafts.
The horizontal swiveling wheel comprises a front pulley and a rear pulley which are symmetrically distributed along the transverse perpendicular bisector of the capping beam by taking the center of the capping beam as a base point, and a left pulley and a right pulley which are symmetrically distributed along the longitudinal perpendicular bisector of the capping beam; the embedded rotating shafts used for penetrating the front pulley, the rear pulley, the left pulley and the right pulley are connected through reinforcing ribs, and the reinforcing ribs form a triangle structure with two collinear bottom edges.
The bottom surfaces of the front pulley, the rear pulley, the left pulley and the right pulley are 2-3cm away from the upper surface of the bent cap.
Annular grooves are formed in the side faces of the front pulley, the rear pulley, the left pulley and the right pulley.
The shock attenuation portion that resets is the annular cuff of being made by wire rope, steel strand wires or elastic fiber rope, the middle part of annular cuff is crisscross turns over to turn over and forms 8 font structures, and the both ends fastening of annular cuff cup joints on the support filler block, and the intersection in the middle of the annular cuff is located the bent cap center department, preceding pulley, rear pulley, left pulley and right pulley correspond respectively and set up in the interval of intersection front side, rear side, left side, right side.
When the main beam is at the designed position, the distance between each annular hoop rope part extending outwards from the intersection point and the front pulley, the rear pulley, the left pulley and the right pulley is 1-1.5cm.
And a plurality of limiting fixing pieces connected with the support cushion stone are arranged on the outer side of the annular hoop.
The limiting fixing piece is an L-shaped steel piece which is buckled on the outer side of the annular hoop, and two ends of the limiting fixing piece are respectively embedded on the filler stone and the bent cap.
The annular grooves on the front pulley, the rear pulley, the left pulley and the right pulley are all provided with a plurality of annular hoops from top to bottom at intervals, and the annular hoops are provided with a plurality of annular grooves from top to bottom along the outer side surface of the supporting seat cushion corresponding to the annular grooves.
According to the pulley type bridge damping structure provided by the invention, the original structural stress system of the bridge is not required to be changed, only a group of horizontal rotary wheels are required to be arranged on the main beam, and the 8-shaped annular hoops are arranged between the support cushion stones, so that each horizontal rotary wheel is respectively arranged in each separation section of the annular hoops; when the earthquake and other conditions occur, the upper main beam is transversely or longitudinally displaced, so that the horizontal rotary wheel and the annular hoops are closely contacted and relatively slide, the tension of the annular hoops is increased, the transverse or longitudinal displacement of the main beam is restrained, the damping effect is achieved, the falling beam risk of the main beam is reduced, and the main beam is restored to the original position through the restoration deformation capacity of the rope body. The invention has simple structure, low cost, rapid construction, convenient maintenance and replacement, can limit the transverse/longitudinal displacement of the girder, can automatically reset the girder, effectively prolongs the service life of the bridge, ensures the traffic safety of people and vehicles, and has good engineering application prospect.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a view in the direction B-B of fig. 1.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, and the embodiments of the present invention are given in detail on the premise of the technical solution of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.
The pulley type bridge damping structure comprises a force transmission part and a damping reset part which are matched with each other.
As shown in fig. 1 and 2, the force transmission parts are a front pulley 1a, a rear pulley 1b, a left pulley 1c and a right pulley 1d which are installed at the bottom of the main beam M. The front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d are all horizontal rotary wheels, which are respectively arranged on the embedded rotating shaft 2 connected with the main beam M in a penetrating way and are fixed through upper and lower nuts. When the novel bridge is installed, the center of the bent cap is taken as a base point, the front pulley 1a and the rear pulley 1b are symmetrically distributed along the transverse perpendicular bisector of the bent cap N, and the left pulley 1c and the right pulley 1d are symmetrically distributed along the longitudinal perpendicular bisector of the bent cap N. In order to keep the structure stable, a reinforcing rib 3 is welded between the embedded rotating shafts 2 to form a triangle structure with two collinear bottom edges as shown in figure 3. In order to ensure the reliability of the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d and the connection performance with the main beam M, the diameter of the embedded rotating shaft 2 is at least 5cm, the diameter of each pulley is at least 15cm, and the diameter of the reinforcing rib 3 is at least 3cm. The side surfaces of the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d are also provided with annular grooves 4, and when a plurality of annular grooves 4 are arranged, the annular grooves are all arranged at intervals from top to bottom. To reduce friction, the bottom surfaces of the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d are kept at a distance of at least 2-3cm from the upper surface of the bent cap N.
As shown in fig. 3, the shock absorbing return portion is an annular cuff 5 made of a wire rope, a steel strand or an elastic fiber rope. The middle part of the annular hoops 5 is folded alternately once to form an 8-shaped structure, two ends of the annular hoops are tightly sleeved between the paired support cushion stones R on the bent cap N, the middle cross point is positioned at the center of the bent cap, the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d are just positioned in the intervals of the front side, the rear side, the left side and the right side of the cross point respectively, and each pulley is adjacent to two rope parts extending outwards from the cross point of the annular hoops 5. When the main beam M does not generate transverse displacement or longitudinal displacement and is in a normal design position, the spacing between the rope portions of the annular hoops 5 adjacent to the two sides of the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d is kept between 1 cm and 1.5cm. The above-mentioned ring-shaped hoops 5 should be selected to have a proper size so that the whole rope body is in a tight state, and the positions of the rope bodies correspond to the positions of the ring-shaped grooves 4 on the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d, so that the ring-shaped hoops 5 interact with the pulleys to reset the main beam M when the main beam M is laterally or longitudinally displaced.
In order to prevent displacement of the annular collar 5, a plurality of limit fixtures 6 connected to the support cushion R are installed on the outer side thereof. Each annular hoop 5 is fixed by adopting 18 limiting fixing pieces 6, the limiting fixing pieces 6 are all L-shaped steel pieces and are uniformly distributed on three outer side surfaces of each support cushion stone R, and two ends of each annular hoop are respectively embedded on the top surface of the capping beam N and the outer side wall of the support cushion stone R. When the number of the annular ferrules 5 is plural, they are arranged at intervals from top to bottom along the outer side surface of the holder cushion R and the annular grooves 4 of the front pulley 1a, the rear pulley 1b, the left pulley 1c, and the right pulley 1 d.
When the upper main beam M is transversely or longitudinally displaced, the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d connected to the bottom of the main beam M move along with the upper main beam M, and further contact and collide with the annular hoops 5, so that the positions of the crossing points of the annular hoops 5 are changed, and the tension of the annular hoops 5 is increased; the transverse or longitudinal displacement of the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d is restrained under the influence of the increase of the tension of the annular hoops 5, so that the transverse or longitudinal displacement of the upper main beam M is reduced, the damping effect is realized, and the beam falling risk of the upper main beam M is reduced; the increase of the pulling force of the annular hoops 5 causes the rope body to generate opposite elastic restoring force, so that the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d are caused to generate opposite displacement, and the upper main beam M is further caused to restore to the original position, so that earthquake energy is consumed, and the shock absorption effect is realized.
In the process, the front pulley 1a, the rear pulley 1b, the left pulley 1c and the right pulley 1d can enable the rope body to be embedded in the annular groove 4 in the process of contacting with the annular hoop 5, so that the annular hoop 5 is prevented from being separated from the pulley; meanwhile, the pulley rolls in the process of being in contact with the annular hoop 5, so that friction force between the pulley and the annular hoop 5 is reduced, damage to the annular hoop 5 caused by overlarge friction force is reduced, and stability and safety of a bridge structure are guaranteed. Further, under the influence of the tensile force of the annular hoops 5, the three outer side faces of the support cushion R are pressed to cause the plane to be sheared, but as the support cushion R is also subjected to the vertical pressure transmitted by the upper main beam M through the support, the local shearing capacity of the support cushion R can be improved, and therefore the stability and safety of the bridge structure are ensured.
Claims (4)
1. A pulley type bridge shock attenuation structure which characterized in that: comprising
The force transmission part is arranged at the bottom of the main beam;
The damping reset parts are arranged between the paired support cushion stones on the bent cap;
The middle part of the damping reset part is arranged at intervals corresponding to the force transmission part, and when the main beam drives the force transmission part to transversely or longitudinally displace, the force transmission part interacts with the damping reset part so as to reset the main beam;
The force transmission part is a group of horizontal rotary wheels which are respectively connected with the main beam through pre-buried rotating shafts;
The horizontal swiveling wheel comprises a front pulley and a rear pulley which are symmetrically distributed along the transverse perpendicular bisector of the capping beam by taking the center of the capping beam as a base point, and a left pulley and a right pulley which are symmetrically distributed along the longitudinal perpendicular bisector of the capping beam; the embedded rotating shafts used for penetrating the front pulley, the rear pulley, the left pulley and the right pulley are connected through reinforcing ribs, and the reinforcing ribs form a triangle structure with two collinear bottom edges;
the bottom surfaces of the front pulley, the rear pulley, the left pulley and the right pulley are 2-3cm away from the upper surface of the bent cap;
the side surfaces of the front pulley, the rear pulley, the left pulley and the right pulley are provided with annular grooves;
The damping reset part is an annular hoop made of a steel wire rope, a steel stranded wire or an elastic fiber rope, the middle part of the annular hoop is folded in a staggered way to form a 8-shaped structure, two ends of the annular hoop are fixedly sleeved on the support cushion stone, an intersection point in the middle of the annular hoop is positioned at the center of the capping beam, and the front pulley, the rear pulley, the left pulley and the right pulley are respectively and correspondingly arranged in the intervals of the front side, the rear side, the left side and the right side of the intersection point;
and a plurality of limiting fixing pieces connected with the support cushion stone are arranged on the outer side of the annular hoop.
2. The pulley bridge shock absorbing structure according to claim 1, wherein: when the main beam is at the designed position, the distance between each annular hoop rope part extending outwards from the intersection point and the front pulley, the rear pulley, the left pulley and the right pulley is 1-1.5cm.
3. The pulley bridge shock absorbing structure according to claim 1, wherein: the limiting fixing piece is an L-shaped steel piece which is buckled on the outer side of the annular hoop, and two ends of the limiting fixing piece are respectively embedded on the filler stone and the bent cap.
4. The pulley bridge shock absorbing structure according to claim 1, wherein: the annular grooves on the front pulley, the rear pulley, the left pulley and the right pulley are all provided with a plurality of annular hoops from top to bottom at intervals, and the annular hoops are provided with a plurality of annular grooves from top to bottom along the outer side surface of the supporting seat cushion corresponding to the annular grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411870.7A CN110894706B (en) | 2019-12-31 | 2019-12-31 | Pulley type bridge damping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411870.7A CN110894706B (en) | 2019-12-31 | 2019-12-31 | Pulley type bridge damping structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110894706A CN110894706A (en) | 2020-03-20 |
| CN110894706B true CN110894706B (en) | 2024-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911411870.7A Active CN110894706B (en) | 2019-12-31 | 2019-12-31 | Pulley type bridge damping structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN110894706B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161731A (en) * | 1997-08-12 | 1999-03-05 | Ishikawajima Harima Heavy Ind Co Ltd | Elastic restraint structure of bridge body in bridge |
| CN211472136U (en) * | 2019-12-31 | 2020-09-11 | 河南省交通规划设计研究院股份有限公司 | Pulley type bridge damping structure |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259159A (en) * | 1990-11-08 | 1993-11-09 | Shimizu Construction Co., Ltd | Construction having a damping device |
| IT1275096B (en) * | 1994-12-19 | 1997-07-30 | Pellegrino Gallo | "EARTHQUAKE-PROOF SYSTEM FOR STRUCTURES SUCH BUILDINGS, VIADUCTS, SIMILAR TANKS" |
| JPH09158538A (en) * | 1995-12-01 | 1997-06-17 | Shimizu Corp | Damping damper |
| JPH11269819A (en) * | 1998-03-23 | 1999-10-05 | Yokohama Rubber Co Ltd:The | Torsion-preventive structure for base isolation skew bridge |
| JP6227932B2 (en) * | 2013-08-21 | 2017-11-08 | 東日本旅客鉄道株式会社 | Fall bridge prevention structure |
| CN105586827B (en) * | 2016-01-29 | 2017-03-22 | 石家庄铁道大学 | Continuous beam bridge vibration reduction device with inertia force activating function |
| CN106284054A (en) * | 2016-08-15 | 2017-01-04 | 桂林市福泰建材有限责任公司 | A kind of bridge aseismic devices |
| CN106284055B (en) * | 2016-08-28 | 2017-12-22 | 北京工业大学 | Continuous bridge inertia activation winding rope damping device |
| CN109577181B (en) * | 2018-12-21 | 2021-01-01 | 黑龙江建筑职业技术学院 | Damping support for bridge |
| CN209482155U (en) * | 2019-01-14 | 2019-10-11 | 兰州理工大学 | A function-separated self-resetting shock-absorbing bridge |
| CN109695200B (en) * | 2019-01-29 | 2023-12-29 | 大连理工大学 | Generalized acceleration mass damper system for transverse bridge direction and torsional vibration reduction of suspension bridge |
-
2019
- 2019-12-31 CN CN201911411870.7A patent/CN110894706B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161731A (en) * | 1997-08-12 | 1999-03-05 | Ishikawajima Harima Heavy Ind Co Ltd | Elastic restraint structure of bridge body in bridge |
| CN211472136U (en) * | 2019-12-31 | 2020-09-11 | 河南省交通规划设计研究院股份有限公司 | Pulley type bridge damping structure |
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| CN110894706A (en) | 2020-03-20 |
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