CN216739200U - Shock attenuation steel box girder and bridge structure system - Google Patents
Shock attenuation steel box girder and bridge structure system Download PDFInfo
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- CN216739200U CN216739200U CN202220097936.0U CN202220097936U CN216739200U CN 216739200 U CN216739200 U CN 216739200U CN 202220097936 U CN202220097936 U CN 202220097936U CN 216739200 U CN216739200 U CN 216739200U
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Abstract
The application relates to a shock attenuation steel box girder and bridge structures system, it includes: the steel box girder comprises a steel box girder body, wherein a mounting channel is arranged in the steel box girder body, and the mounting channel extends along the longitudinal bridge direction; a plurality of damping unit, the damping unit is located install the passageway, the damping unit includes: the energy consumption rod extends to a plurality of damping structures along the longitudinal bridge direction in length, the damping structures are connected with the energy consumption rod, and the upper end and the lower end of each damping structure are connected with the upper wall face and the lower wall face of the installation channel. Therefore, when earthquake force is applied, the damping structure and the energy dissipation rod perform damping and energy absorption, so that the damping steel box girder has an anti-seismic effect, and the whole weight is reduced. The bridge structure system applying the damping steel box girder has excellent performance in transverse shock resistance of the large-span cable-stayed bridge, and can realize transverse, longitudinal and vertical three-dimensional damping effects.
Description
Technical Field
The application relates to the field of steel box girders, in particular to a damping steel box girder and a bridge structure system.
Background
Earthquake is a serious natural disaster faced by human society; according to statistics, the earth generates about 500 million earthquakes per year, wherein the destructive earthquakes above 5 level account for about 1000 times, and the earthquakes bring huge economic and property losses to human beings besides causing casualties. The large-span bridge is used as a life line project, and generally cannot collapse in an earthquake, so measures must be taken to improve the earthquake resistance of the bridge.
In some related technologies, in a high-intensity seismic area, a large-span bridge generally adopts a seismic isolation and reduction system arranged between a bridge body and a bridge pier, for example, an existing large-span floating system bridge generally adopts a viscous damper for damping in the longitudinal direction of the bridge, and a constraint system on a transverse bridge is generally tower-beam solidification and side pier-beam solidification; however, there are the following problems:
(1) the main beam is usually formed by integral casting, vibration also exists in the main beam when an earthquake occurs, and obviously the integrally cast main beam is difficult to effectively absorb the shock per se under one condition and can break per se when the earthquake occurs seriously.
(2) The rigid connection of tower-beam consolidation and side pier-beam consolidation often causes the transverse seismic response of the structure to be overlarge, so that the lower structure is easy to damage and destroy under the action of strong shock.
(3) The longitudinal displacement of the floating system is large, which causes the viscous damper to be slender and easy to be unstable in a plane.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a shock attenuation steel box girder and bridge structures system to solve the girder of monolithic casting among the correlation technique and be difficult to effectively carry out self absorbing problem.
In a first aspect, a shock-absorbing steel box girder is provided, which includes:
the steel box girder comprises a steel box girder body, wherein an installation channel is arranged in the steel box girder body, and the installation channel extends along the longitudinal bridge direction;
a plurality of damping unit, the damping unit is located install the passageway, the damping unit includes:
-a dissipative lever, the length of which extends in the longitudinal direction of the bridge
The damping structures are connected with the energy dissipation rods, and the upper ends and the lower ends of the damping structures are connected with the upper wall surface and the lower wall surface of the installation channel.
In some embodiments, the damping structure comprises:
the two dampers are distributed on the upper side and the lower side of the energy consumption rod;
and the two connecting plates are respectively arranged on the upper wall surface and the lower wall surface of the mounting channel and are connected with the energy consumption rod through corresponding dampers.
In some embodiments, in the plurality of damping units in the transverse bridge direction, a plurality of damping structures are distributed along the transverse bridge direction, and the projection of the connecting plate on the upper wall surface of the installation channel in the plurality of damping structures is completely or partially coincident with the connecting plate on the lower wall surface of the installation channel.
In some embodiments, the damping structures are vertically spaced, and a connecting rod is arranged between two dampers which are adjacent to each other in the transverse bridge direction.
In some embodiments, every two of the damping structures are arranged to intersect, and four dampers in each of the two damping structures are connected to one dissipative rod, such that the intersection point is located on the central axis of the dissipative rod.
In some embodiments, in the plurality of damping units in the transverse bridge direction, the projection of the connecting plate on the upper wall surface of the installation channel is not overlapped with the projection of the connecting plate on the lower wall surface of the installation channel.
In some embodiments, two dampers are connected to the connecting plate on the upper wall surface of the installation channel and the connecting plate on the lower wall surface of the installation channel in the plurality of damping units in the transverse bridge direction, so that the damping structures are connected in series to form a W shape or an inverted W shape.
In some embodiments, the upper surface and the lower surface of the steel box girder body are provided with stiffening ribs extending along the longitudinal bridge direction; stiffening steel plates are arranged on the steel box girder body and positioned on two sides of the installation channel in the transverse bridge direction;
and an extension part is arranged on part of the connecting plate and is connected with the upper wall surface or the lower wall surface of the mounting channel.
In a second aspect, there is provided a bridge construction system comprising:
a bridge tower;
a plurality of guys provided on the bridge tower;
the damping steel box girder is suspended on the bridge tower through a plurality of inhaul cables;
and the energy dissipation assemblies are arranged on two sides of the transverse bridge direction of the damping steel box girder, and connect the bridge tower with the damping steel box girder so as to damp the transverse bridge direction and the longitudinal bridge direction.
In some embodiments, the energy consuming assembly comprises:
the first base is arranged on the bridge tower, and a longitudinal bridge direction limiting groove is formed in the first base;
the second base is connected to the first base through a longitudinal bridge direction limiting groove, and the top of the second base is provided with a spherical groove;
the third base is positioned above the second base and is provided with a spherical part matched with the spherical groove; a damping part is arranged between the third base and the second base.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a shock attenuation steel box girder, owing to be equipped with the installation passageway to running through along indulging the bridge, a plurality of power consumption pole is along indulging the bridge to setting up in the installation passageway, a plurality of damping unit, the damping unit is located the installation passageway, and the damping unit includes length along indulging the power consumption pole of bridge to extension to and the damping structure who is connected with the power consumption pole, the upper and lower both ends of damping structure are connected with the upper and lower two walls of installation passageway, thereby when receiving seismic force, the damping structure carries out the shock attenuation energy-absorbing with the power consumption pole, makes shock attenuation steel box girder itself have the antidetonation effect, has also alleviateed holistic weight simultaneously.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a shock-absorbing steel box girder and a bridge structure system provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a shock-absorbing steel box girder provided in an embodiment of the present application;
fig. 3 is a schematic diagram of an energy consumption assembly according to an embodiment of the present application.
In the figure: 1. a steel box girder body; 2. installing a channel; 3. an energy consumption rod; 4. a damping structure; 40. a damper; 41. a connecting plate; 42. an extension portion; 5. a bridge tower; 6. a cable; 7. an energy consuming component; 70. a first base; 71. a longitudinal bridge direction limiting groove; 72. a second base; 73. a spherical groove; 74. a third base; 75. a spherical portion; 76. a damping member; 8. a stiffening rib; 9. and a stiffened steel plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiment of the application provides a shock attenuation steel box girder and bridge structures system to solve the problem that the girder of monolithic casting is difficult to effectively carry out self shock attenuation among the correlation technique.
Referring to fig. 1 and 2, a shock-absorbing steel box girder includes: the steel box girder comprises a steel box girder body 1, an installation channel 2 and a plurality of damping units.
Wherein installation passageway 2 sets up inside steel box girder body 1 to installation passageway 2 extends along the longitudinal bridge to. A plurality of damping units are positioned in the installation channel 2 and distributed at intervals in the transverse bridge direction. The damping unit comprises an energy consumption rod 3 and a plurality of damping structures 4, and the length of the energy consumption rod 3 extends along the longitudinal bridge direction. The damping structure 4 is connected with the energy consumption rod 3, and the upper end and the lower end of the damping structure 4 are connected with the upper wall surface and the lower wall surface of the installation channel 2. The energy dissipation rod 3 can be damping H-shaped steel.
Therefore, when earthquake force is applied, the damping structure and the energy dissipation rod perform vertical or oblique damping and energy absorption, so that the damping steel box girder has an anti-seismic effect, and the whole weight is reduced.
In some preferred embodiments, the damping structure 4 comprises: two dampers 40 and two connecting plates 41.
The two dampers 40 are distributed on the upper side and the lower side of the energy consumption rod 3; the two connecting plates 41 are respectively arranged on the upper wall surface and the lower wall surface of the installation channel 2 and are connected with the dissipative rod 3 through the corresponding dampers 40. The shape of the connecting plate 41 is T-shaped, wherein the following structural forms are distributed for the damper 40 and the connecting plate 41:
first, in the plurality of damping units in the transverse bridge direction, the plurality of damping structures 4 are distributed along the transverse bridge direction, and the projection of the connecting plate 41 on the upper wall surface of the installation channel 2 in the plurality of damping structures 4 is completely or partially overlapped with the connecting plate 41 on the lower wall surface of the installation channel 2.
Under this form, there are also two categories:
in the first type, all the damping structures 4 are vertically spaced, and a connecting rod is arranged between two dampers 40 adjacent to each other in the transverse bridge direction.
In the second category, every two damping structures 4 are arranged crosswise, and four dampers 40 in two damping structures 4 are connected to one dissipative rod 3, so that the intersection points are located on the central axis of the dissipative rod 3.
Second, in the plurality of damper units in the transverse bridge direction, the projection of the connecting plate 41 on the upper wall surface of the installation duct 2 does not overlap with the connecting plate 41 on the lower wall surface of the installation duct 2. This form is subdivided into two categories:
in the third type, two dampers 40 are connected to the connecting plate 41 on the upper wall surface of the installation passage 2 and the connecting plate 41 on the lower wall surface of the installation passage 2) among the plurality of damper units in the transverse bridge direction so that the damper structures 4 are connected in series in a W-shape.
In the fourth type, two dampers 40 are connected to the connecting plate 41 on the upper wall surface of the installation path 2 and the connecting plate 41 on the lower wall surface of the installation path 2 among the plurality of damper units in the transverse bridge direction) so that the damper structures 4 are connected in series in an inverted W shape.
The above multiple arrangement forms can realize the shock resistance of the steel box girder, and simultaneously, the overall weight is reduced, and the arrangement forms can be selected according to actual needs.
In some preferred embodiments, the upper surface and the lower surface of the steel box girder body 1 are provided with stiffening ribs 8 extending along the longitudinal bridge direction; and stiffening steel plates 9 are arranged on the steel box girder body 1 and on two sides of the transverse bridge direction of the installation channel 2. The partial connecting plates 41 are provided with extending parts 42, the extending parts 42 are connected with the upper wall surface or the lower wall surface of the installation channel 2, and the connecting plates 41 on the left side and the right side of the transverse bridge as shown in fig. 2 are provided with the extending parts 42, so that the structural rigidity of the steel box girder body 1 is further enhanced.
Referring to fig. 1-3, the present application further proposes a bridge construction system comprising:
a bridge tower 5; the bridge tower 5 is not provided with a cross beam below the damping steel box girder, and the appearance shape of the bridge tower 5 can be A type, H type and the like.
A plurality of guys 6 provided on the bridge tower 5;
the damping steel box girder is suspended on the bridge tower 5 through a plurality of inhaul cables 6;
and the energy dissipation assemblies 7 are arranged on two sides of the transverse bridge direction of the damping steel box girder, and connect the bridge tower 5 with the damping steel box girder so as to damp in the transverse bridge direction and the longitudinal bridge direction.
The bridge structure system can utilize the energy dissipation assembly 7 to absorb shock in the transverse bridge direction and the longitudinal bridge direction, and also utilizes the shock absorption of the shock absorption steel box girder in the vertical direction, so that the shock absorption steel box girder has the three-way shock absorption capacity. And the damping steel box girder is completely loaded by the inhaul cable 6 and is not ballasted on the bridge tower 5, so that the damping steel box girder is a novel structural system. The technical problem that the longitudinal viscous damper is slender and easy to destabilize can be solved; the technical problem of transverse shock resistance of the large-span cable-stayed bridge is solved.
Further, the energy consuming assembly 7 comprises: the damping device comprises a first base 70, a longitudinal bridge limiting groove 71, a second base 72, a spherical groove 73, a third base 74, a spherical part 75 and a damping piece 76. The first base 70 is arranged on the bridge tower 5 and is provided with a longitudinal bridge limiting groove 71; the second base 72 is connected to the first base 70 through a longitudinal bridge limiting groove 71, and the top of the second base is provided with a spherical groove 73; the third base 74 is located above the second base 72 and is provided with a spherical portion 75 fitted with the spherical groove 73; a damper 76 is provided between the third base 74 and the second base 72. The energy dissipation assembly 7 can refer to the structure in the related art, and the principle of shock absorption in the longitudinal bridge direction and the transverse bridge direction can be explained, which is not described in detail herein.
The principle of the application is as follows:
the bridge structure system can utilize the energy dissipation assemblies 7 to absorb shock in the transverse bridge direction and the longitudinal bridge direction, and also utilizes the shock absorption of the shock absorption steel box girder in the vertical direction, so that the shock absorption steel box girder has the three-direction shock absorption capacity. And the damping steel box girder is completely loaded by the inhaul cable 6 and is not ballasted on the bridge tower 5, so that the damping steel box girder is a novel structural system. The technical problem that the longitudinal viscous damper is slender and easy to destabilize can be solved; the technical problem of transverse shock resistance of the large-span cable-stayed bridge is solved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A shock attenuation steel box girder which characterized in that, it includes:
the steel box girder comprises a steel box girder body (1), wherein a mounting channel (2) is arranged in the steel box girder body, and the mounting channel (2) extends along the longitudinal bridge direction;
a plurality of damping unit, the damping unit is located installation passageway (2), the damping unit includes:
-a dissipative lever (3) having a length extending in the longitudinal bridge direction
-a plurality of damping structures (4), wherein the damping structures (4) are connected with the energy consumption rod (3), and the upper and lower ends of the damping structures (4) are connected with the upper and lower wall surfaces of the installation channel (2).
2. A shock-absorbing steel box girder according to claim 1, wherein the damping structure (4) comprises:
the two dampers (40) are distributed on the upper side and the lower side of the energy consumption rod (3);
and the two connecting plates (41) are respectively arranged on the upper wall surface and the lower wall surface of the mounting channel (2) and are connected with the energy consumption rod (3) through corresponding dampers (40).
3. The shock-absorbing steel box girder of claim 2, wherein:
in the plurality of damping units in the transverse bridge direction, a plurality of damping structures (4) are distributed along the transverse bridge direction, and the projection of a connecting plate (41) positioned on the upper wall surface of the mounting channel (2) in the plurality of damping structures (4) is completely or partially overlapped with the connecting plate (41) positioned on the lower wall surface of the mounting channel (2).
4. A shock-absorbing steel box girder according to claim 3, wherein:
the damping structures (4) are vertically arranged at intervals, and a connecting rod is arranged between every two adjacent dampers (40) in the transverse bridge direction.
5. A shock absorbing steel box girder according to claim 3, wherein:
every two damping structures (4) are arranged in a crossed mode, and four dampers (40) in the two damping structures (4) are connected with one dissipative rod (3) so that the crossed point is located on the central shaft of the dissipative rod (3).
6. The shock-absorbing steel box girder of claim 2, wherein:
in the plurality of damping units in the transverse bridge direction, the projection of the connecting plate (41) positioned on the upper wall surface of the installation channel (2) is not overlapped with the connecting plate (41) positioned on the lower wall surface of the installation channel (2).
7. The shock-absorbing steel box girder of claim 6, wherein:
in the plurality of damping units in the transverse bridge direction, two dampers (40) are connected to a connecting plate (41) on the upper wall surface of the installation channel (2) and a connecting plate (41) on the lower wall surface of the installation channel (2), so that the damping structures (4) are connected in series to form a W shape or an inverted W shape.
8. The shock-absorbing steel box girder of claim 2, wherein:
stiffening ribs (8) extending along the longitudinal bridge direction are arranged on the upper surface and the lower surface of the steel box girder body (1); stiffening steel plates (9) are arranged on the steel box girder body (1) and positioned on two sides of the installation channel (2) in the transverse bridge direction;
and an extension part (42) is arranged on part of the connecting plate (41), and the extension part (42) is connected with the upper wall surface or the lower wall surface of the mounting channel (2).
9. A bridge construction system, comprising:
a bridge tower (5);
a plurality of guys (6) provided on the bridge tower (5);
the shock-absorbing steel box girder of any one of claims 1 to 8, which is suspended on a bridge tower (5) by a plurality of guys (6);
and the energy dissipation assemblies (7) are arranged on two sides of the transverse bridge direction of the damping steel box girder, and connect the bridge tower (5) with the damping steel box girder so as to damp in the transverse bridge direction and the longitudinal bridge direction.
10. A bridge construction system according to claim 9, wherein the energy consuming components (7) comprise:
the first base (70) is installed on the bridge tower (5) and is provided with a longitudinal bridge limiting groove (71);
a second base (72) which is connected to the first base (70) through a longitudinal bridge direction limiting groove (71), and the top of the second base is provided with a spherical groove (73);
a third base (74) which is positioned above the second base (72) and is provided with a spherical part (75) matched with the spherical groove (73); a damping member (76) is provided between the third base (74) and the second base (72).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114182617A (en) * | 2022-01-14 | 2022-03-15 | 中铁大桥局集团有限公司 | Shock attenuation steel box girder and bridge structure system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182617A (en) * | 2022-01-14 | 2022-03-15 | 中铁大桥局集团有限公司 | Shock attenuation steel box girder and bridge structure system |
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