阅读说明：本技术 一种装配式箱梁桥及其抗震结构 (Assembled box girder bridge and earthquake-resistant structure thereof ) 是由 刘炳书 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种装配式箱梁桥及其抗震结构,涉及桥梁工程技术领域。本发明包括桥墩主体、支座和箱梁主体,支座固定于桥墩主体的顶部,箱梁主体固定于支座的顶部,箱梁主体包括顶板区、翼缘区、腹板区和底板区,顶板区位于箱梁主体的顶部,翼缘区位于箱梁主体的顶部且位于顶板区的两侧。本发明通过箱梁主体、第一牵引机构、第二牵引机构和配重机构之间的相互配合,使得桥梁的抗震结构设置于箱梁内部,避免了工人高空作业,降低了工人的安全隐患,降低了桥梁建设的施工难度,通过顶板区、腹板区、底板区和支撑区之间的相互配合,使得箱梁的受力更加均匀,降低了桥梁腹板处的应力,提高了桥梁的承载能力。(The invention discloses an assembled box girder bridge and an anti-seismic structure thereof, and relates to the technical field of bridge engineering. The box girder comprises a pier main body, a support and a box girder main body, wherein the support is fixed at the top of the pier main body, the box girder main body is fixed at the top of the support, the box girder main body comprises a top plate area, a flange area, a web area and a bottom plate area, the top plate area is positioned at the top of the box girder main body, and the flange area is positioned at the top of the box girder main body and positioned at two sides of the top plate area. According to the box girder, the box girder main body, the first traction mechanism, the second traction mechanism and the counterweight mechanism are matched with each other, so that an anti-seismic structure of the bridge is arranged in the box girder, high-altitude operation of workers is avoided, potential safety hazards of the workers are reduced, construction difficulty of bridge construction is reduced, and through the mutual matching among the top plate area, the web plate area, the bottom plate area and the supporting area, the box girder is stressed more uniformly, stress at the web plate of the bridge is reduced, and the bearing capacity of the bridge is improved.)

1. An assembled box girder bridge and an anti-seismic structure thereof comprise a pier main body (1), a support (2) and a box girder main body (3), wherein the support (2) is fixed at the top of the pier main body (1), and the box girder main body (3) is fixed at the top of the support (2);

the box girder comprises a box girder main body (3), and is characterized in that the box girder main body (3) comprises a top plate area (6), flange areas (7), web areas (8) and bottom plate areas (9), wherein the top plate area (6) is positioned at the top of the box girder main body (3), the flange areas (7) are positioned at the top of the box girder main body (3) and positioned at two sides of the top plate area (6), the web areas (8) are positioned at two ends of the box girder main body (3) and positioned at the bottom of the top plate area (6), and the bottom plate areas (9) are positioned at the bottom of the box girder main body (3);

the box girder comprises a box girder main body (3), wherein a plurality of supporting areas (10) which are convenient for increasing the supporting force of the box girder main body (3) are arranged in the box girder main body (3), the box girder main body (3) is divided into a plurality of shear cavities and damping cavities (11) through the supporting areas (10), and the damping cavities (11) are positioned in the middle of the box girder main body (3);

the inside of shock attenuation chamber (11) is equipped with and is convenient for to reduce the attenuator module of bridge vibration, the attenuator module includes first drive mechanism (12), second drive mechanism (32) and counter weight mechanism (33).

2. An assembled box girder bridge and anti-seismic structure thereof according to claim 1, wherein the first traction mechanism (12) comprises a first fixing plate (13), a first pulley assembly (14), a first driving plate (15), a first elastic member (16), a first rope joint (17), a first cable (18) and a first connecting block (19), the first fixing plate (13) is fixed at one end of the upper end of the shock-absorbing chamber (11), the first pulley assembly (14) is fixedly connected to one end of the first fixing plate (13) far away from the shock-absorbing chamber (11), the first driving plate (15) is welded to one end of the first fixing plate (13) and is located at the lower end of the first pulley assembly (14), the first elastic member (16) is assembled inside the first driving plate (15), and the first rope joint (17) is assembled at one end of the first elastic member (16), the first cable (18) is fixedly connected to one end of the first rope joint (17), and the first connecting block (19) is fixedly connected to the lower end of the first cable (18).

3. The fabricated box girder bridge and anti-seismic structure thereof according to claim 2, wherein the second traction mechanism (32) includes a second fixing plate (20), a second pulley assembly (21), a second transmission plate (22), a second elastic member (23), a second rope joint (24), a second cable (25), and a second connection block (26), the second fixing plate (20) is fixedly connected to the other end of the upper end of the shock-absorbing chamber (11), the second pulley assembly (21) is fixedly connected to one end of the second fixing plate (20) near the first fixing plate (13), the first cable (18) passes through the inside of the second pulley assembly (21), the second transmission plate (22) is welded to one end of the second fixing plate (20) near the first fixing plate (13) and is located at the lower end of the second pulley assembly (21), the second elastic member (23) is assembled inside the second transmission plate (22), the second rope joint (24) is assembled at one end of the second elastic element (23) far away from the second fixing plate (20), the second cable (25) is fixedly connected to one end of the second rope joint (24) far away from the second fixing plate (20), the second cable (25) penetrates through the inside of the first pulley assembly (14), and the second connecting block (26) is fixedly connected to the lower end of the second cable (25).

4. An assembled box girder bridge and anti-seismic structure thereof according to claim 1, wherein the counterweight mechanism (33) comprises an upper limit plate (27), a threaded suspension rod (28), a lower limit plate (29), a fastening nut (30) and a counterweight (31), the upper limit plate (27) is welded and connected to the bottoms of the first connecting block (19) and the second connecting block (26), the threaded suspension rod (28) is slidably connected to the inside of the upper limit plate (27), the lower limit plate (29) is welded and connected to the bottom of the threaded suspension rod (28), the fastening nut (30) is screwed and connected to the outside of the threaded suspension rod (28) and is located at the upper end of the upper limit plate (27), and the counterweight (31) is slidably connected to the outside of the threaded suspension rod (28) and is located between the upper limit plate (27) and the lower limit plate (29).

5. The assembled box girder bridge and the anti-seismic structure thereof according to claim 3, wherein bolt through holes are formed in the first fixing plate (13) and the second fixing plate (20), bolt bottom holes are formed in both ends of the upper end of the damping cavity (11), and the box girder main body (3) and the first fixing plate (13) are fixedly connected with the second fixing plate (20) of the box girder main body (3) through expansion bolts.

6. An assembled box girder bridge and earthquake-resistant structure thereof according to claim 3, wherein the first elastic member (16) and the second elastic member (23) are tension springs.

7. An assembled box girder bridge and seismic structure thereof according to claim 3, wherein the first and second cables (18, 25) are each formed by winding a plurality of wire ropes around each other.

8. An assembled box girder bridge and seismic structure thereof according to claim 4, wherein the threaded hanger bar (28) and the counterweight (31) are in clearance fit.

9. The fabricated box girder bridge and the anti-seismic structure thereof according to claim 1, wherein a plurality of positioning bosses (4) are uniformly arranged on one side of the box girder main body (3), and a plurality of positioning grooves (5) corresponding to the positioning bosses (4) are arranged on the other side of the box girder main body (3) so as to facilitate positioning between two adjacent box girder main bodies (3).

Technical Field

The invention belongs to the technical field of bridge engineering, and particularly relates to an assembled box girder bridge and an anti-seismic structure thereof.

Background

The box girder bridge refers to a girder bridge with a main girder in a thin-wall closed section form. Long hollow girders, usually made of steel or concrete, are used as the girders, which make the bridge light and strong, and the bridge constructed by this method is called a box girder bridge.

With the continuous development of the transportation industry in China, large-span bridges (particularly box girder bridges, cable-stayed bridges and suspension bridges) become the mainstream of the bridge construction in China at present. The construction of large-span bridges has developed rapidly since the eighties of the last century. However, since 1918, at least 11 bridges have been damaged and destroyed in the world under the influence of wind. One typical accident is the collapse of the tacoma suspension bridge of 1940 in eight high winds of 19m/s due to vibrations caused by torsion. The separation of the airflow through the blunt bridge structure forms periodic vortex shedding and generates periodic aerodynamic force acting on the bridge, and when the vortex shedding frequency is close to a certain natural frequency of the bridge, the resonance of the bridge is excited, so that the bridge is damaged.

In order to avoid collapse of the bridge due to resonance of the bridge under the action of wind power, usually, after the bridge main body is built, an anti-seismic structure is additionally arranged on the bridge, but in the prior art, the anti-seismic structure of the bridge is erected outside the bridge, high-altitude operation of workers is needed, certain inconvenience and potential safety hazards exist, and the construction difficulty of bridge construction is increased.

Disclosure of Invention

The invention aims to provide an assembled box girder bridge and an anti-seismic structure thereof, which aim to solve the existing problems: in the prior art, the bridge anti-seismic structure is erected outside the bridge, workers need to work high above the ground, certain inconvenience and potential safety hazards exist, and the construction difficulty of bridge construction is increased.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to an assembled box girder bridge and an anti-seismic structure thereof, which comprise a pier main body, a support and a box girder main body, wherein the support is fixed at the top of the pier main body;

the box girder comprises a box girder main body and is characterized in that the box girder main body comprises a top plate area, flange areas, web areas and a bottom plate area, the top plate area is positioned at the top of the box girder main body, the flange areas are positioned at the top of the box girder main body and positioned at two sides of the top plate area, the web areas are positioned at two ends of the box girder main body and positioned at the bottom of the top plate area, and the bottom plate area is positioned at the bottom of the box girder main body;

the box girder comprises a box girder main body and is characterized in that a plurality of supporting areas convenient for increasing the supporting force of the box girder main body are arranged inside the box girder main body, the inside of the box girder main body is divided into a plurality of shear cavities and damping cavities through the supporting areas, and the damping cavities are positioned in the middle of the inside of the box girder main body;

the inside of shock attenuation chamber is equipped with and is convenient for to the attenuator module of being convenient for reduce bridge vibration, the attenuator module includes first drive mechanism, second drive mechanism and counter weight mechanism.

Furthermore, the first traction mechanism comprises a first fixing plate, a first pulley assembly, a first transmission plate, a first elastic element, a first rope joint, a first cable and a first connecting block, the first fixing plate is fixed at one end of the upper end of the damping cavity, the first pulley assembly is fixedly connected to one end, away from the damping cavity, of the first fixing plate, the first transmission plate is connected to one end of the first fixing plate in a welding mode and located at the lower end of the first pulley assembly, the first elastic element is assembled inside the first transmission plate, the first rope joint is assembled at one end of the first elastic element, the first cable is fixedly connected to one end of the first rope joint, and the first connecting block is fixedly connected to the lower end of the first cable.

Further, the second traction mechanism comprises a second fixing plate, a second pulley assembly, a second transmission plate, a second elastic element, a second rope joint, a second cable and a second connecting block, the second fixing plate is fixedly connected to the other end of the upper end of the damping cavity, the second pulley assembly is fixedly connected to one end of the second fixing plate close to the first fixing plate, the first cable penetrates through the second pulley assembly, the second transmission plate is welded to one end of the second fixing plate close to the first fixing plate and located at the lower end of the second pulley assembly, the second elastic element is assembled inside the second transmission plate, the second rope joint is assembled at one end of the second elastic element far away from the second fixing plate, the second cable is fixedly connected to one end of the second rope joint far away from the second fixing plate, and the second cable penetrates through the inside of the first pulley assembly, and the second connecting block is fixedly connected to the lower end of the second cable.

Further, counter weight mechanism includes spacing board, screw thread jib, lower spacing board, fastening nut and balancing weight, go up spacing board welded connection in the bottom of first connecting block and second connecting block, screw thread jib sliding connection is in the inside of last spacing board, spacing board welded connection is in the bottom of screw thread jib down, fastening nut threaded connection just is located the upper end of spacing board in the outside of screw thread jib, balancing weight sliding connection just is located between spacing board and the lower spacing board in the outside of screw thread jib.

Further, bolt via holes have all been seted up to the inside of first fixed plate and second fixed plate, bolt bottom hole has all been seted up at the both ends of shock attenuation chamber upper end, all through expansion bolts fixed connection between case roof beam main part and first fixed plate and the case roof beam main part second fixed plate.

Furthermore, the first elastic element and the second elastic element are both tension springs.

Further, the first cable and the second cable are both formed by winding a plurality of steel wire ropes with each other.

Furthermore, clearance fit is formed between the threaded suspender and the balancing weight.

Furthermore, one side of the box girder main body is uniformly provided with a plurality of positioning bosses, and the other side of the box girder main body is provided with a plurality of positioning grooves matched with the positioning bosses, so that the positioning between two adjacent box girder main bodies is facilitated.

The invention has the following beneficial effects:

1. according to the box girder, the box girder main body, the first traction mechanism, the second traction mechanism and the counterweight mechanism are mutually matched, so that the anti-seismic structure of the bridge is arranged in the box girder, the high-altitude operation of workers is avoided, the potential safety hazard of the workers is reduced, and the construction difficulty of bridge construction is reduced.

2. According to the invention, through the mutual matching of the top plate area, the web plate area, the bottom plate area and the supporting area, the stress of the box girder is more uniform, the stress at the web plate of the bridge is reduced, and the bearing capacity of the bridge is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A in accordance with the present invention;

FIG. 3 is a rear view of the overall structure of the present invention;

FIG. 4 is an enlarged view of a portion of the invention at B in FIG. 3;

FIG. 5 is a schematic structural view of the main body of the box girder of the present invention;

FIG. 6 is a structural cross-sectional view of the main body of the box girder of the present invention;

FIG. 7 is a schematic structural view of a first traction mechanism, a second traction mechanism and a counterweight mechanism of the present invention;

FIG. 8 is an exploded view of the first pulling mechanism, second pulling mechanism and counterweight mechanism of the present invention;

FIG. 9 is a force analysis diagram of the counterweight mechanism of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a pier main body; 2. a support; 3. a box girder main body; 4. positioning the boss; 5. a positioning groove; 6. a roof region; 7. a flange region; 8. a web region; 9. a floor region; 10. a support region; 11. a damping chamber; 12. a first traction mechanism; 13. a first fixing plate; 14. a first sheave assembly; 15. a first drive plate; 16. a first elastic element; 17. a first rope joint; 18. a first cable; 19. a first connection block; 20. a second fixing plate; 21. a second sheave assembly; 22. a second drive plate; 23. a second elastic element; 24. a second rope joint; 25. a second cable; 26. a second connecting block; 27. an upper limiting plate; 28. a threaded hanger rod; 29. a lower limiting plate; 30. fastening a nut; 31. a balancing weight; 32. a second traction mechanism; 33. a counterweight mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment discloses an assembled box girder bridge and an anti-seismic structure thereof.

The bridge pier comprises a bridge pier main body 1, a support 2 and a box girder main body 3, wherein the support 2 is fixed at the top of the bridge pier main body 1, and the box girder main body 3 is fixed at the top of the support 2;

please refer to fig. 1-6:

the box girder main body 3 comprises a top plate area 6, flange areas 7, web areas 8 and bottom plate areas 9, wherein the top plate area 6 is positioned at the top of the box girder main body 3, the flange areas 7 are positioned at the top of the box girder main body 3 and positioned at two sides of the top plate area 6, the web areas 8 are positioned at two ends of the box girder main body 3 and positioned at the bottom of the top plate area 6, and the bottom plate areas 9 are positioned at the bottom of the box girder main body 3;

the inside of the box girder main body 3 is provided with a plurality of supporting areas 10 which are convenient for increasing the supporting force of the box girder main body 3, the inside of the box girder main body 3 is divided into a plurality of shear chambers and damping chambers 11 through the supporting areas 10, and the damping chambers 11 are positioned in the middle of the inside of the box girder main body 3;

the inside of the shock absorption cavity 11 is provided with a damper module which is convenient for reducing the vibration of the bridge and comprises a first traction mechanism 12, a second traction mechanism 32 and a counterweight mechanism 33;

please refer to fig. 7-8:

the first traction mechanism 12 comprises a first fixing plate 13, a first pulley assembly 14, a first transmission plate 15, a first elastic element 16, a first rope joint 17, a first cable 18 and a first connecting block 19, wherein the first fixing plate 13 is fixed at one end of the upper end of the shock absorption cavity 11, the first pulley assembly 14 is fixedly connected to one end of the first fixing plate 13 far away from the shock absorption cavity 11, the first transmission plate 15 is welded and connected to one end of the first fixing plate 13 and is positioned at the lower end of the first pulley assembly 14, the first elastic element 16 is assembled in the first transmission plate 15, the first rope joint 17 is assembled at one end of the first elastic element 16, the first cable 18 is fixedly connected to one end of the first rope joint 17, and the first connecting block 19 is fixedly connected to the lower end of the first cable 18;

the second traction mechanism 32 includes a second fixing plate 20, a second pulley assembly 21, a second transmission plate 22, a second elastic element 23, a second rope joint 24, a second cable 25 and a second connecting block 26, the second fixing plate 20 is fixedly connected to the other end of the upper end of the shock-absorbing chamber 11, the second pulley assembly 21 is fixedly connected to one end of the second fixing plate 20 close to the first fixing plate 13, and the first cable 18 penetrates through the inside of the second pulley assembly 21, the second transmission plate 22 is welded to one end of the second fixing plate 20 close to the first fixing plate 13 and located at the lower end of the second pulley assembly 21, the second elastic element 23 is assembled inside the second transmission plate 22, the second rope joint 24 is assembled at one end of the second elastic element 23 far from the second fixing plate 20, the second cable 25 is fixedly connected to one end of the second rope joint 24 far from the second fixing plate 20, and the second cable 25 penetrates through the inside of the first pulley assembly 14, the second connecting block 26 is fixedly connected to the lower end of the second cable 25;

the counterweight mechanism 33 comprises an upper limiting plate 27, a threaded suspender 28, a lower limiting plate 29, a fastening nut 30 and a counterweight 31, wherein the upper limiting plate 27 is connected to the bottoms of the first connecting block 19 and the second connecting block 26 in a welding manner, the threaded suspender 28 is connected to the inside of the upper limiting plate 27 in a sliding manner, the lower limiting plate 29 is connected to the bottom of the threaded suspender 28 in a welding manner, the fastening nut 30 is connected to the outer side of the threaded suspender 28 in a threaded manner and is located at the upper end of the upper limiting plate 27, and the counterweight 31 is connected to the outer side of the threaded suspender 28 in a sliding manner and is located between the upper limiting plate 27 and the lower limiting plate 29;

bolt through holes are formed in the first fixing plate 13 and the second fixing plate 20, bolt bottom holes are formed in two ends of the upper end of the damping cavity 11, and the box girder main body 3, the first fixing plate 13 and the box girder main body 3 are fixedly connected with the second fixing plate 20 through expansion bolts;

preferably, the first elastic element 16 and the second elastic element 23 are both tension springs;

preferably, the first cable 18 and the second cable 25 are each composed of a plurality of steel cords intertwined with each other;

the threaded suspender 28 and the counterweight 31 are in clearance fit;

please refer to fig. 1-4:

one side of case roof beam main part 3 evenly is provided with a plurality of location bosss 4, and the opposite side of case roof beam main part 3 is provided with a plurality of positioning groove 5 that suit with location boss 4, is convenient for fix a position between two adjacent case roof beam main parts 3.

One specific application of this embodiment is:

when heavy vehicles pass through the top of the box girder main body 3, the force applied to the top plate area 6 is transmitted to the bottom plate area 9 through the web area 8 and the support area 10, and is transmitted to the ground through the bottom plate area 9, the pier main body 1 and the support 2, so that the pressure applied to the web area 8 is reduced, the box girder main body 3 is stressed more uniformly, stress concentration at the web area 8 is avoided, and the bearing capacity of the box girder main body 3 is improved;

please refer to fig. 9:

when the bridge is in a static state, the first traction mechanism 12 provides an upward force Fa to the counterweight mechanism 33, the second traction mechanism 32 provides an upward force Fb to the counterweight mechanism 33, when in the static state, Fa can be decomposed into F1 in the vertical direction and F2 in the horizontal direction, Fb can be decomposed into F3 in the vertical direction and F4 in the horizontal direction, and F2 and F4 are equal in size and opposite in direction;

when the bridge vibrates under the action of large wind force, the box girder main body 3 vibrates and inclines;

when the box girder main body 3 is inclined to the end close to the first traction mechanism 12, the box girder main body 3 drives the first fixing plate 13 and the second fixing plate 20 to move through the fixed connection of the first fixing plate 13 and the box girder main body 3 and the fixed connection of the second fixing plate 20 and the box girder main body 3, the first fixing plate 13 drives the first transmission plate 15 to move through the welded connection of the first fixing plate 13 and the first transmission plate 15, the first transmission plate 15 stretches the first elastic element 16 and drives the first elastic element 16 to move because the first elastic element 16 is assembled inside the first transmission plate 15, the first elastic element 16 drives the first rope joint 17 to move because the first rope joint 17 is assembled at one end of the first elastic element 16, and simultaneously, the force of the first elastic element 16 acting on the first rope joint 17 becomes large, and through the fixed connection of the first rope joint 17 and the first rope 18, the first rope joint 17 drives the first cable 18 to move, and the first cable 18 drives the first connecting block 19 to move through the fixed connection of the first cable 18 and the first connecting block 19, so that the acting force Fa of the first traction mechanism 12 on the counterweight mechanism 33 is further increased;

when the second fixing plate 20 moves, the second fixing plate 20 drives the second transmission plate 22 to move towards the direction close to the first traction mechanism 12 through the welding connection between the second fixing plate 20 and the second transmission plate 22, the tension of the second transmission plate 22 on the second elastic element 23 is reduced due to the fact that the second elastic element 23 is assembled inside the second transmission plate 22, the tension of the second elastic element 23 on the second rope joint 24 is reduced due to the fact that the second rope joint 24 is assembled at one end of the second elastic element 23, the tension of the second connecting block 26 on the counterweight mechanism 33 is reduced, and meanwhile, the acting force Fb of the second traction mechanism 32 on the counterweight mechanism 33 is reduced;

when Fa is larger than Fb, the weight mechanism 33 is caused to move in a direction to approach the second traction mechanism 32;

similarly, when Fb is greater than Fa, the counterweight mechanism 33 moves towards the direction close to the first traction mechanism 12, and the acting force of wind on the box girder main body 3 is consumed through the cooperation of the first traction mechanism 12, the second traction mechanism 32 and the counterweight mechanism 33, so that the acting force of wind on the bridge is reduced;

meanwhile, the damper module is arranged inside the box girder main body 3, so that the damper module can be installed on the ground when being assembled on a bridge, the high-altitude operation of workers is avoided, the potential safety hazard of the workers is reduced, and the construction difficulty of bridge construction is reduced.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.