A shock-absorbing steel box girder and bridge structure system

Abstract

The present application relates to a shock-absorbing steel box girder and bridge structure system, which includes: a steel box girder body, an installation channel is provided inside the steel box girder, and the installation channel extends along the longitudinal direction of the bridge; a plurality of damping units, the damping units are located in the installation channel, and the damping units include: an energy-absorbing rod, the length of which extends along the longitudinal direction of the bridge; a plurality of damping structures, the damping structures are connected to the energy-absorbing rods, and the upper and lower ends of the damping structures are connected to the upper and lower walls of the installation channel. Therefore, when subjected to earthquake forces, the damping structures and the energy-absorbing rods absorb shock and energy, so that the shock-absorbing steel box girder itself has an anti-seismic effect, and at the same time, the overall weight is reduced. It also makes the bridge structure system using the shock-absorbing steel box girder have excellent performance in the lateral earthquake resistance of large-span cable-stayed bridges, and can achieve three-dimensional shock-absorbing effects in the lateral, longitudinal and vertical directions.

Description

Technical Field

[0001] The present application relates to the field of steel box girders, and in particular to a shock-absorbing steel box girder and a bridge structure system. Background Art

[0002] Earthquakes are a serious natural disaster faced by human society. According to statistics, there are an average of 5 million earthquakes on Earth each year, of which about 1,000 are destructive earthquakes of magnitude 5 or above. In addition to causing casualties, earthquakes also bring huge economic and property losses to humans. As a lifeline project, large-span bridges generally cannot collapse during earthquakes, so measures must be taken to improve the seismic performance of bridges.

[0003] In some related technologies, in high-intensity earthquake zones, large-span bridges generally use a seismic isolation system between the bridge beam and the pier. For example, existing large-span floating system bridges generally use viscous dampers in the longitudinal direction of the bridge for shock absorption, and the constraint system on the transverse bridge is usually tower-beam consolidation and side pier-beam consolidation; however, there are the following problems:

[0004] (1) The main beam is usually cast as a whole and will vibrate itself during an earthquake. Obviously, the main beam cast as a whole cannot effectively reduce its own vibration under certain circumstances and may even break in serious cases.

[0005] (2) Rigid connections such as tower-beam consolidation and pier-beam consolidation often cause excessive lateral seismic response of the structure, making the lower structure susceptible to damage and destruction under strong earthquakes.

[0006] (3) The longitudinal displacement of the floating system is relatively large, which causes the viscous damper to be relatively slender and prone to instability in the plane. Summary of the invention

[0007] The embodiments of the present application provide a shock-absorbing steel box girder and a bridge structure system to solve the problem in the related art that the integrally cast main beam is difficult to effectively perform self-shock absorption.

[0008] In a first aspect, a shock-absorbing steel box girder is provided, comprising:

[0009] The steel box girder body has an installation channel inside, and the installation channel extends along the longitudinal direction of the bridge;

[0010] A plurality of damping units, each of which is located in the installation channel and includes:

[0011] -Energy dissipation rod, the length of which extends along the longitudinal direction of the bridge

[0012] - A plurality of damping structures, wherein the damping structures are connected to the energy-absorbing rods, and the upper and lower ends of the damping structures are connected to the upper and lower walls of the installation channel.

[0013] In some embodiments, the damping structure comprises:

[0014] Two dampers are distributed on the upper and lower sides of the energy dissipation rod;

[0015] Two connecting plates are respectively arranged on the upper and lower wall surfaces of the installation channel and are connected to the energy-absorbing rod through corresponding dampers.

[0016] In some embodiments, among the multiple damping units in the transverse bridge direction, the multiple damping structures are distributed along the transverse bridge direction, and the projections of the connecting plates located on the upper wall of the installation channel in the multiple damping structures completely overlap or partially overlap with the connecting plates located on the lower wall of the installation channel.

[0017] In some embodiments, the damping structures are arranged vertically at intervals, and a connecting rod is provided between two adjacent dampers in the transverse direction of the bridge.

[0018] In some embodiments, every two of the damping structures are cross-arranged, and the four dampers in the two damping structures are connected to an energy-absorbing rod, so that the intersection point is located on the central axis of the energy-absorbing rod.

[0019] In some embodiments, in the plurality of damping units upwardly of the cross bridge, the projection of the connecting plate located on the upper wall of the installation channel does not overlap with the projection of the connecting plate located on the lower wall of the installation channel.

[0020] In some embodiments, among the multiple damping units upward from the cross bridge, two dampers are connected to the connecting plate located on the upper wall of the installation channel and the connecting plate located on the lower wall of the installation channel, so that the damping structure is connected in series into a W shape or an inverted W shape.

[0021] In some embodiments, the upper surface and the lower surface of the steel box girder body are both provided with stiffening ribs extending in the longitudinal direction of the bridge; stiffening steel plates are provided on the steel box girder body and on both sides of the installation channel in the transverse direction of the bridge;

[0022] Some of the connecting plates are provided with extension parts, and the extension parts are connected to the upper wall surface or the lower wall surface of the installation channel.

[0023] In a second aspect, a bridge structure system is provided, comprising:

[0024] bridge towers;

[0025] A plurality of cables are arranged on the bridge tower;

[0026] Shock-absorbing steel box girder, which is suspended on the bridge tower by multiple cables;

[0027] The energy-absorbing components are arranged on both sides of the shock-absorbing steel box girder in the transverse direction of the bridge, and the bridge tower is connected with the shock-absorbing steel box girder to reduce vibration in the transverse direction and the longitudinal direction of the bridge.

[0028] In some embodiments, the energy consuming component includes:

[0029] A first base, which is installed on the bridge tower and is provided with a longitudinal bridge-direction limiting groove;

[0030] The second base is connected to the first base through the longitudinal bridge limit groove and has a spherical groove on the top;

[0031] The third base is located above the second base and is provided with a spherical portion matched with the spherical groove; a damping member is provided between the third base and the second base.

[0032] The beneficial effects of the technical solution provided by this application include:

[0033] The embodiment of the present application provides a shock-absorbing steel box girder, which has an installation channel running through it along the longitudinal direction of the bridge, a plurality of energy-absorbing rods are arranged in the installation channel along the longitudinal direction of the bridge, and a plurality of damping units are provided. The damping units are located in the installation channel, and the damping units include energy-absorbing rods whose lengths extend along the longitudinal direction of the bridge, and a damping structure connected to the energy-absorbing rods. The upper and lower ends of the damping structure are connected to the upper and lower walls of the installation channel, so that when subjected to seismic force, the damping structure and the energy-absorbing rods perform shock-absorbing and energy-absorbing, so that the shock-absorbing steel box girder itself has a seismic effect, while also reducing the overall weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic diagram of a shock-absorbing steel box girder and a bridge structure system provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of a shock-absorbing steel box girder provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of an energy-consuming component provided in an embodiment of the present application.

[0038] In the figure: 1. Steel box girder body; 2. Installation channel; 3. Energy dissipation rod; 4. Damping structure; 40. Damper; 41. Connecting plate; 42. Extension part; 5. Bridge tower; 6. Cable; 7. Energy dissipation component; 70. First base; 71. Longitudinal bridge limit groove; 72. Second base; 73. Spherical groove; 74. Third base; 75. Spherical part; 76. Damping member; 8. Stiffening rib; 9. Stiffening steel plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] The embodiments of the present application provide a shock-absorbing steel box girder and a bridge structure system to solve the problem in the related art that the integrally cast main beam is difficult to effectively perform self-shock absorption.

[0041] See also Figure 1 and Figure 2 , a shock-absorbing steel box girder comprises: a steel box girder body 1, a mounting channel 2 and a plurality of damping units.

[0042] The installation channel 2 is arranged inside the steel box girder body 1, and the installation channel 2 extends along the longitudinal bridge direction. A plurality of damping units are located in the installation channel 2, and are spaced apart in the transverse bridge direction. The damping unit includes an energy absorbing rod 3 and a plurality of damping structures 4, and the length of the energy absorbing rod 3 extends along the longitudinal bridge direction. The damping structure 4 is connected to the energy absorbing rod 3, and the upper and lower ends of the damping structure 4 are connected to the upper and lower walls of the installation channel 2. The energy absorbing rod 3 can be a shock-absorbing H-shaped steel.

[0043] Therefore, when subjected to earthquake forces, the damping structure and the energy-absorbing rods absorb shock energy vertically or diagonally, making the shock-absorbing steel box girder itself earthquake-resistant while also reducing the overall weight.

[0044] In some preferred embodiments, the damping structure 4 includes: two dampers 40 and two connecting plates 41 .

[0045] Two dampers 40 are distributed on the upper and lower sides of the energy dissipation rod 3; two connecting plates 41 are respectively arranged on the upper and lower walls of the installation channel 2, and are connected to the energy dissipation rod 3 through the corresponding dampers 40. The connecting plate 41 is T-shaped, and the structural forms for the distribution of the dampers 40 and the connecting plates 41 are as follows:

[0046] The first type is that, in the multiple damping units in the transverse bridge direction, the multiple damping structures 4 are distributed along the transverse bridge direction, and the projections of the connecting plates 41 located on the upper wall of the installation channel 2 in the multiple damping structures 4 completely overlap or partially overlap with the connecting plates 41 located on the lower wall of the installation channel 2.

[0047] This form is further divided into two categories:

[0048] In the first category, all the damping structures 4 are arranged vertically at intervals, and a connecting rod is provided between two adjacent dampers 40 in the transverse bridge direction.

[0049] In the second type, every two damping structures 4 are cross-arranged, and the four dampers 40 in the two damping structures 4 are all connected to one energy dissipation rod 3 , so that the intersection point is located on the central axis of the energy dissipation rod 3 .

[0050] The second type is that in the multiple damping units in the cross bridge upward direction, the projection of the connecting plate 41 located on the upper wall of the installation channel 2 does not overlap with the connecting plate 41 located on the lower wall of the installation channel 2. This type is further divided into two categories:

[0051] The third type is that among the multiple damping units upward from the cross bridge, two dampers 40 are connected to the connecting plate 41 located on the upper wall of the installation channel 2 and the connecting plate 41 located on the lower wall of the installation channel 2) to make the damping structure 4 connected in series into a W shape.

[0052] The fourth type, among the multiple damping units upward from the cross bridge, two dampers 40 are connected to the connecting plate 41 located on the upper wall of the installation channel 2 and the connecting plate 41 located on the lower wall of the installation channel 2) so that the damping structure 4 is connected in series into an inverted W shape.

[0053] The above-mentioned various arrangements can all achieve the effect of improving the seismic performance of the steel box girder itself, while also reducing the overall weight, and can be selected according to actual needs.

[0054] In some preferred embodiments, the upper and lower surfaces of the steel box girder body 1 are provided with stiffening ribs 8 extending in the longitudinal direction; the steel box girder body 1 is provided with stiffening steel plates 9 on both sides of the installation channel 2 in the transverse direction. Some connecting plates 41 are provided with extensions 42, which are connected to the upper wall or the lower wall of the installation channel 2. Figure 2 The connecting plates 41 on the left and right sides of the transverse bridge shown in the figure have extension parts 42, so as to further strengthen the structural rigidity of the steel box girder body 1.

[0055] See also Figure 1-Figure 3 , the present application also proposes a bridge structure system, which includes:

[0056] Bridge tower 5: Bridge tower 5 has no cross beam under the shock-absorbing steel box girder, and the appearance of bridge tower 5 can be A-type, H-type, etc.

[0057] A plurality of cables 6 are arranged on the bridge tower 5;

[0058] A shock-absorbing steel box girder, the shock-absorbing steel box girder is suspended on the bridge tower 5 through a plurality of cables 6;

[0059] The energy dissipation assembly 7 is arranged on both sides of the shock-absorbing steel box girder in the transverse direction of the bridge, and connects the bridge tower 5 with the shock-absorbing steel box girder to reduce vibration in the transverse direction and the longitudinal direction of the bridge.

[0060] This bridge structure system can not only use the energy dissipation component 7 to reduce vibration in the transverse and longitudinal directions of the bridge, but also use the above-mentioned shock-absorbing steel box girder to reduce vibration in the vertical direction, and has the ability of three-way shock absorption. In addition, the shock-absorbing steel box girder is fully supported by the cable 6, and is not ballasted on the bridge tower 5. It is a new type of structural system. It can better solve the technical problem of slender longitudinal viscous damper and easy instability; solve the technical problem of lateral earthquake resistance of large-span cable-stayed bridges.

[0061] Furthermore, the energy dissipation assembly 7 includes: a first base 70, a longitudinal bridge limit groove 71, a second base 72, a spherical groove 73, a third base 74, a spherical portion 75 and a damping member 76. The first base 70 is installed on the bridge tower 5, and is provided with a longitudinal bridge limit groove 71; the second base 72 is connected to the first base 70 through the longitudinal bridge limit groove 71, and is provided with a spherical groove 73 on the top; the third base 74 is located above the second base 72, and is provided with a spherical portion 75 that cooperates with the spherical groove 73; a damping member 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 relevant technology to explain its shock absorption principle in the longitudinal bridge direction and the transverse bridge direction, and no excessive elaboration is made here.

[0062] Principles of this application:

[0063] This bridge structure system can not only use the energy dissipation component 7 to reduce vibration in the transverse and longitudinal directions of the bridge, but also use the above-mentioned shock-absorbing steel box girder to reduce vibration in the vertical direction, and has the ability of three-way shock absorption. In addition, the shock-absorbing steel box girder is fully supported by the cable 6, and is not ballasted on the bridge tower 5. It is a new type of structural system. It can better solve the technical problem of slender longitudinal viscous damper and easy instability; solve the technical problem of lateral earthquake resistance of large-span cable-stayed bridges.

[0064] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0065] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A shock-absorbing steel box girder, characterized in that: It includes: A steel box girder body (1) is provided with an installation channel (2) inside, and the installation channel (2) extends along the longitudinal direction of the bridge; A plurality of damping units, each of which is located in the installation channel (2), and each of which comprises: - an energy dissipation rod (3), the length of which extends in the longitudinal direction of the bridge; - a plurality of damping structures (4), wherein the damping structures (4) are connected to the energy-absorbing rod (3), and the upper and lower ends of the damping structures (4) are connected to the upper and lower walls of the installation channel (2); The damping structure (4) comprises: Two dampers (40) are distributed on the upper and lower sides of the energy dissipation rod (3); Two connecting plates (41), which are respectively arranged on the upper and lower walls of the installation channel (2) and connected to the energy-absorbing rod (3) through corresponding dampers (40); In the plurality of damping units facing upward from the cross bridge, the projection of the connecting plate (41) located on the upper wall of the installation channel (2) does not overlap with the projection of the connecting plate (41) located on the lower wall of the installation channel (2); Among the multiple damping units in the cross-bridge upward direction, two dampers (40) are connected to a connecting plate (41) located on the upper wall of the installation channel (2) and a connecting plate (41) located on the lower wall of the installation channel (2), so that the damping structure (4) is connected in series to form a W shape or an inverted W shape; Or, in the plurality of damping units in the transverse direction, the plurality of damping structures (4) are distributed along the transverse direction, and the projection of the connecting plate (41) located on the upper wall of the installation channel (2) in the plurality of damping structures (4) completely overlaps or partially overlaps with the connecting plate (41) located on the lower wall of the installation channel (2); Every two of the damping structures (4) are arranged crosswise, and the four dampers (40) in the two damping structures (4) are connected to an energy-absorbing rod (3), so that the intersection point is located on the central axis of the energy-absorbing rod (3); The upper surface and the lower surface of the steel box girder body (1) are both provided with stiffening ribs (8) extending in the longitudinal direction of the bridge; stiffening steel plates (9) are provided on the steel box girder body (1) and on both sides of the installation channel (2) in the transverse direction of the bridge; An extension portion (42) is provided on part of the connecting plate (41), and the extension portion (42) is connected to the upper wall surface or the lower wall surface of the installation channel (2).

2. The shock-absorbing steel box girder according to claim 1, characterized in that: The damping structures (4) are arranged at intervals in a vertical direction, and a connecting rod is provided between two adjacent dampers (40) in the transverse bridge direction.

3. A bridge structure system, characterized in that: It includes: Bridge towers (5); A plurality of cables (6) are arranged on the bridge tower (5); The shock-absorbing steel box girder according to claim 1 or 2, wherein the shock-absorbing steel box girder is suspended on the bridge tower (5) by a plurality of cables (6); The energy dissipation components (7) are arranged on both sides of the shock-absorbing steel box girder in the transverse direction of the bridge, and connect the bridge tower (5) with the shock-absorbing steel box girder to reduce vibration in the transverse direction and the longitudinal direction of the bridge.

4. The bridge structure system according to claim 3, characterized in that: The energy consumption component (7) comprises: A first base (70) is mounted on the bridge tower (5) and is provided with a longitudinal bridge-direction limiting groove (71); A second base (72) is connected to the first base (70) via a longitudinal bridge limiting groove (71) and has a spherical groove (73) on its top; The third base (74) is located above the second base (72) and is provided with a spherical portion (75) that matches the spherical groove (73); a damping member (76) is provided between the third base (74) and the second base (72).

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