CN217974009U - Bridge restraint system - Google Patents
Bridge restraint system Download PDFInfo
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- CN217974009U CN217974009U CN202221558782.7U CN202221558782U CN217974009U CN 217974009 U CN217974009 U CN 217974009U CN 202221558782 U CN202221558782 U CN 202221558782U CN 217974009 U CN217974009 U CN 217974009U
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Abstract
The embodiment of the application provides a bridge restraint system, includes: the first cable tower is connected with the main beam through a cable; the first support assembly with shearing force is arranged between a tower pier and a main beam of the first cable tower; the first energy absorption assembly is arranged between a tower pier and a main beam of the first cable tower; the first support assembly keeps the main beam longitudinally fixed in a normal state, and is sheared when an earthquake reaches a preset level, so that the main beam can move longitudinally; the first energy absorption assembly does not play a role in a normal state and enters a working state after the first support assembly is sheared; the longitudinal direction is the length direction of the main beam. The utility model discloses can guarantee cable-stay bridge under the normal condition structure atress reliability, can reduce the earthquake effect response again when meeting with the earthquake, can reduce rail expansion adjustment ware and big displacement telescoping device's setting simultaneously.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to a bridge constraint system.
Background
The constraint system of the cable-stayed bridge is a combination mode of a beam, a tower and a pier, and is a main factor influencing the mechanical property of the cable-stayed bridge. The constraint system of the railway cable-stayed bridge comprises a semi-floating system, a supporting system, a tower beam consolidation system and a rigid frame system, wherein the rigid frame system is mainly used for single-tower cable-stayed bridges, the tower beam consolidation system is mainly used for part of cable-stayed bridges with medium and small spans, and the large-span railway cable-stayed bridge basically adopts the semi-floating system or the supporting system with the tower pier consolidation and the tower beam separation. By 2020, 29 large-span railway cable-stayed bridges built and built in China all adopt semi-floating systems or supporting systems. ( Citation of documents: chen Liangjiang, wen Wangqing Chinese railroad bridge (1980-2020) [ M ] Beijing: china railway Press Limited, 2020 )
The semi-floating body system cable-stayed bridge is formed by tower pier consolidation and tower beam separation, only vertical supports are arranged between a main beam and a tower and between the main beam and the pier, and a longitudinal elastic restraint device or a damper is arranged between the main beam and a bridge tower. The semi-floating body system reduces the internal force response of the structure on the basis of ensuring the passing safety of the train, and has better static dynamic performance and excellent anti-seismic performance.
The support system cable-stayed bridge is formed by the consolidation of tower piers and the separation of tower beams, a vertical support is arranged between a main beam and a tower and between the main beam and one bridge tower, and a longitudinal fixed support is arranged between the main beam and one bridge tower. The longitudinal force action of the support system cable-stayed bridge such as train braking force and the like under the operation working condition is borne by the longitudinal fixed support, the structural stress is clear, and the system is reliable.
When the railway cable-stayed bridge adopts a semi-floating system, the overall mechanical property of the railway cable-stayed bridge is slightly superior to that of a supporting system under the normal use condition, and the railway cable-stayed bridge is mainly characterized in that the stress of a lower structure is more uniform and the basic scale is relatively small. The semi-floating body system has obvious advantages under the action of earthquake, the foundation scale is greatly lower than that of a supporting system, and the longitudinal displacement response of the main beam is larger. On the contrary, when the railway cable-stayed bridge adopts a supporting system, the structure is stressed clearly under the normal use condition, but the stress of the fixed pier is larger under the earthquake action, and the foundation scale is greatly increased. Therefore, the main problem to be solved in the prior art is to balance the performance and economy of the structure in normal use and seismic conditions.
In addition, the large-span railway cable-stayed bridge needs to be provided with a steel rail telescopic regulator and a large displacement telescopic device at the bridge end according to the structural arrangement, which is unfavorable for the running of the train. The design Specification for railway tracks (TB 10082-2017[ S ]) specifically proposes that the number of rail expansion and contraction actuators should be minimized.
In summary, under the prior art, a constraint system for a railway cable-stayed bridge, which can ensure the structural stress reliability under normal conditions, reduce the response of earthquake action when encountering an earthquake, and simultaneously reduce a steel rail expansion adjuster and a large displacement expansion device as much as possible, is sought.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not form the prior art that is known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a bridge restraint system to solve the performance and the economic nature of present restraint system unable balanced normal use state and seismic state structure, the technical problem that reduces rail expansion adjustment ware and big displacement telescoping device's the quantity that sets up again can't be controlled simultaneously.
According to an embodiment of the present application, there is provided a bridge restraint system, including:
the first cable tower is connected with the main beam through a cable;
the first support assembly with shearing force is arranged between a tower pier and a main beam of the first cable tower;
the first energy absorption assembly is arranged between a tower pier and a main beam of the first cable tower;
the first support assembly keeps the main beam longitudinally fixed in a normal state, and is sheared when an earthquake reaches a preset level, so that the main beam can move longitudinally; the first energy absorption assembly does not play a role in a normal state and enters a working state after the first support assembly is sheared; the longitudinal direction is the length direction of the main beam.
The first support assembly comprises a first fixed support and a first transverse movable support which are arranged at intervals in the transverse direction; wherein the transverse direction is the width direction of the main beam;
when the earthquake reaches a preset number of stages, the first fixed support is sheared to form a first longitudinal movable support, and the first transverse movable support is sheared to form a first multidirectional movable support.
The utility model discloses still include:
a second seat assembly;
the second cable tower is connected with the main beam through a stay cable;
the bridge piers are respectively positioned on the outer sides of the first cable tower and the second cable tower;
the second support assemblies are respectively arranged between the bridge pier and the main beam and between the tower pier of the second cable tower and the main beam;
wherein the second support assembly comprises a second longitudinal cradle and a second multi-directional cradle mounted in a laterally spaced apart relationship.
The first fixed support and the second longitudinal movable support form a column in the longitudinal direction; the first transverse cradle and the second multi-directional cradle form a column in the longitudinal direction.
The first energy absorbing assembly comprises two first viscous dampers;
two first viscous dampers are all arranged between the tower pier and the main beam of the first cable tower, and are arranged along the transverse bilateral symmetry.
The utility model discloses still include second energy-absorbing subassembly, set up the second cable tower with between the girder.
The second energy absorber assembly comprises two second viscous dampers;
the two second viscous dampers are arranged between the second cable tower and the main beam and are arranged transversely and bilaterally symmetrically;
the second viscous damper does not play a role in a normal state, and the second longitudinal movable support enters a working state under the action of rare earthquakes.
The first cable tower is a low cable tower, and the second cable tower is a high cable tower.
The utility model discloses still include:
the first transverse wind-resistant support is arranged between the inner side of the tower body of the first cable tower and the outer side of the main beam;
the horizontal anti-wind support of second, the horizontal anti-wind support of second set up in between the tower body inboard and the girder outside of second cable tower.
Due to the adoption of the technical scheme, the embodiment of the application has the following technical effects:
the utility model organically combines the semi-floating body system and the supporting system of the existing railway cable-stayed bridge,
set up the first support subassembly and the first subassembly that can absorb that have the shearing force between the tower mound of first cable-stayed tower and the girder, first support subassembly keeps under the normality the girder is vertical fixed, when the earthquake reaches and predetermines the progression, first support subassembly is cut and makes the girder vertically can move about, and first subassembly that can absorb energy does not play a role under the normality, and goes into operating condition after first support subassembly is cut, promptly the utility model discloses for the supporting system under normal use condition, the structure atress is clear and definite, and seismic action is the semi-floating system down, and the shock attenuation effect is obvious. As a preferred technical scheme, first support subassembly includes along the first fixing support and the first horizontal movable support of horizontal interval installation, and when the earthquake reached preset progression, first fixing support was cut off and is formed first vertical movable support, and first horizontal movable support is cut off and is formed first multidirectional movable support, makes the utility model discloses can enough deal with the load condition under the normal condition, can deal with the load condition under the earthquake state again. The first energy absorption assembly is a first viscous damper, the first viscous damper does not play a role under the normal use condition, and the support enters a working state after being sheared off under the earthquake action. In order to further improve the utility model discloses a horizontal anti-wind ability, first cable tower still are provided with first horizontal anti-wind support with the girder outside, and the second cable tower still is provided with the horizontal anti-wind support of second with the girder outside. Compared with a semi-floating body system, the combined constraint system has clear structural stress and reliable system under the normal use condition, and only one side of a bridge is required to be provided with a steel rail telescopic regulator and a large displacement telescopic device; compare with the supporting system, the utility model discloses a combination formula restraint system is structural response under the earthquake effect and is showing and reduce, and the basic scale reduces by a wide margin.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of the present invention;
fig. 2 is a distribution diagram of the first viscous damper, the second longitudinal and second multidirectional mobile supports, the first fixed and first transverse mobile supports, and the first and second transverse wind-resistant supports of the present invention;
fig. 3 is a transverse position relationship diagram between the first fixed support, the first transverse movable support, the first transverse wind-resistant support, the first viscous damper, the first cable tower and the main beam of the utility model;
fig. 4 is a longitudinal position relationship diagram between the first transverse movable support, the first transverse wind-resistant support and the first viscous damper, the first cable tower and the main beam of the utility model;
FIG. 5 is a diagram showing a positional relationship between the first fixed support and the first laterally movable support in a normal state;
FIG. 6 is a diagram of the positional relationship of the first longitudinal cradle and the first multi-directional cradle in an earthquake state;
reference numerals are as follows:
the damping device comprises 1-a first cable tower, 2-a main beam, 3-a pier, 4-a second cable tower, 5-a first transverse wind-resistant support, 6-a first viscous damper, 7-a first transverse movable support, 8-a second multidirectional movable support, 9-a second longitudinal movable support, 10-a second viscous damper, 11-a second transverse wind-resistant support, 12-a first fixed support, 13-a first multidirectional movable support and 14-a first longitudinal movable support.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1 and 2, a bridge restraint system includes:
the main beam 2 and the first cable tower 1, and the first cable tower 1 and the main beam 2 are connected through a stay cable;
the first support assembly with shearing force is arranged between a tower pier of the first cable tower 1 and the main beam 2;
the first energy absorption assembly is arranged between a tower pier of the first cable tower 1 and the main beam 2;
the first support assembly keeps the girder 2 longitudinally fixed in a normal state, and is sheared to enable the girder 2 to move longitudinally when an earthquake reaches a preset level; the first energy absorption assembly does not play a role in a normal state and enters a working state after the first support assembly is sheared; the longitudinal direction is the length direction of the main beam 2.
As shown in fig. 2, the first support assembly includes a first fixed support 12 and a first transverse movable support 7 which are installed at intervals in the transverse direction; wherein, the transverse direction is the width direction of the main beam 2;
as shown in fig. 6, when the earthquake reaches a preset level, the first fixed support 12 is sheared to form a first longitudinal movable support 14, and the first transverse movable support 7 is sheared to form a first multidirectional movable support 13.
As shown in fig. 1 and fig. 2, the present invention further includes:
a second seat assembly;
the second cable tower 4, the second cable tower 4 and the main beam 2 are connected through a stay cable;
the bridge piers 3 are respectively positioned on the outer sides of the first cable pylon 1 and the second cable pylon 4;
second support assemblies are respectively arranged between the pier 3 and the main beam 2 and between the tower pier and the main beam 2 of the second cable tower 4;
wherein the second support assembly comprises a second longitudinal movable support 9 and a second multi-directional movable support 8 which are arranged at intervals along the transverse direction.
As shown in fig. 2, the first fixed support 12 and the second longitudinal movable support 9 form a column in the longitudinal direction; the first transverse cradle 7 and the second multi-directional cradle 8 form a column in the longitudinal direction.
As shown in fig. 2, 3 and 4, the first energy absorbing assembly includes two first viscous dampers 6;
two first viscous dampers 6 are arranged between the tower pier of the first cable tower 1 and the main beam 2, and the two first viscous dampers 6 are arranged along the transverse bilateral symmetry.
As shown in fig. 2, the utility model also comprises a second energy-absorbing assembly, which is arranged between the second cable tower 4 and the main beam 2, and the second energy-absorbing assembly comprises two second viscous dampers 10; the two second viscous dampers 10 are arranged between the second cable tower 4 and the main beam 2, and the two second viscous dampers 10 are transversely arranged in a left-right symmetrical manner;
wherein, the second viscous damper 10 does not work under the normal state, and when the earthquake reaches the preset level, such as under the action of rare earthquake, the second longitudinal movable support 9 enters the working state.
As shown in fig. 1, the first cable tower 1 is a low cable tower and the second cable tower 4 is a high cable tower.
As shown in fig. 2, the present invention further includes:
the first transverse wind-resistant support 5 is arranged between the inner side of the tower body of the first cable tower 1 and the outer side of the main beam 2; the horizontal anti-wind support of second 11, the horizontal anti-wind support of second 11 sets up between the tower body inboard and the girder 2 outsides of second cable tower 4.
As shown in fig. 5, the present invention organically combines the existing semi-floating body system of railway cable-stayed bridge with the supporting system, and sets a second longitudinal movable support 9 and a second multidirectional movable support 8 on each pier 3 and the tower pier of the second pylon 4, and at the same time, sets a second viscous damper 10 on one side of the second longitudinal movable support 9 and the second multidirectional movable support 8 on the tower pier of the second pylon 4, i.e. sets two second viscous dampers 10, and sets a first support component with shearing force between the tower pier of the first pylon 1 and the main beam 2, the supporting component is a first fixed support 12 and a first transverse movable support 7, and at the same time, sets a first viscous damper 6 on one side of the first fixed support 12 and the first transverse movable support 7, i.e. sets two first viscous dampers 6, wherein, the first viscous damper 6 and the second viscous damper 10, the output force of a single damper is 1800KN, the maximum displacement is 250mm, the damping coefficient is 3000 KN/(m/s), the speed index is 0.3, the bridge is only provided with a large displacement expansion device and a steel rail expansion adjuster at the side beam end of the second cable tower 4, under the normal state, the first fixed support 12 and the first transverse movable support 7 enable the main beam 2 to be longitudinally fixed and not to move, the first viscous damper 6 and the second viscous damper 10 can not play a role, under the earthquake state, the first fixed support 12 and the first transverse movable support 7 are sheared, the main beam 2 can be longitudinally moved, the first viscous damper 6 and the second viscous damper 10 play a role, under the action of rare earthquake (E2 earthquake), as shown in figure 6, due to the shearing force generated by the earthquake, the first fixed support 12 and the first transverse movable support 7 are sheared into a first longitudinal movable support 14 and a first multidirectional movable support 13, under the matching action of the first longitudinal movable support 14, the first multidirectional movable support 13, other supports, the first viscous damper 6 and the second viscous damper 10, the earthquake action response of the structure of the bridge body is greatly reduced, and the bridge body has the advantages of a semi-floating system and a supporting system.
In the description of the present application and the embodiments thereof, it is to be understood that the terms "top", "bottom", "height", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
In this application and its embodiments, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application and its embodiments, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The above disclosure provides many different embodiments, or examples, for implementing different features of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A bridge restraint system, comprising:
the main beam (2) and the first cable tower (1), wherein the first cable tower (1) and the main beam (2) are connected through a stay cable;
the first support assembly with shearing force is arranged between a tower pier of the first cable tower (1) and the main beam (2);
the first energy absorption assembly is arranged between a tower pier of the first cable tower (1) and the main beam (2);
the first support assembly keeps the main beam (2) longitudinally fixed in a normal state, and is sheared when an earthquake reaches a preset level, so that the main beam (2) can move longitudinally; the first energy absorption assembly does not play a role in a normal state and enters a working state after the first support assembly is sheared; the longitudinal direction is the length direction of the main beam (2).
2. A bridge restraint system according to claim 1 wherein the first abutment assembly comprises a first fixed abutment (12) and a first laterally moveable abutment (7) mounted in laterally spaced apart relation; wherein the transverse direction is the width direction of the main beam (2);
when the earthquake reaches a preset level, the first fixed support (12) is sheared to form a first longitudinal movable support (14), and the first transverse movable support (7) is sheared to form a first multidirectional movable support (13).
3. A bridge restraint system according to claim 2, further comprising:
a second seat assembly;
the second cable tower (4), the second cable tower (4) and the main beam (2) are connected through a stay cable;
a plurality of piers (3), the piers (3) being located outside the first cable tower (1) and the second cable tower (4), respectively;
the second support assemblies are respectively arranged between the pier (3) and the main beam (2) and between the tower pier of the second cable tower (4) and the main beam (2);
wherein the second support assembly comprises a second longitudinal movable support (9) and a second multi-directional movable support (8) which are arranged at intervals along the transverse direction.
4. A bridge restraint system according to claim 3, wherein the first fixed abutment (12) and the second longitudinally movable abutment (9) form a column in the longitudinal direction; the first transverse movable support (7) and the second multi-directional movable support (8) form a column in the longitudinal direction.
5. A bridge restraint system according to claim 3 wherein the first energy absorbing assembly comprises two first viscous dampers (6);
two first viscous dampers (6) are all arranged between the tower pier and the main beam (2) of the first cable tower (1), and the first viscous dampers (6) are arranged along the transverse bilateral symmetry.
6. A bridge restraint system according to claim 5, further comprising a second energy absorbing assembly disposed between the second pylon (4) and the main beam (2).
7. A bridge restraint system according to claim 6, wherein the second energy absorber assembly comprises two second viscous dampers (10);
the two second viscous dampers (10) are arranged between the second cable tower (4) and the main beam (2), and the two second viscous dampers (10) are arranged transversely and bilaterally symmetrically;
the second viscous damper (10) does not play a role in a normal state, and when an earthquake reaches a preset stage, the second longitudinal movable support (9) enters a working state.
8. A bridge restraint system according to claim 6, wherein the first pylon (1) is a low pylon and the second pylon (4) is a high pylon.
9. A bridge restraint system according to claim 6,
further comprising:
the first transverse wind-resistant support (5) is arranged between the inner side of the tower body of the first cable tower (1) and the outer side of the main beam (2);
the horizontal anti-wind support of second (11), the horizontal anti-wind support of second (11) set up in between the tower body inboard and girder (2) outside of second cable tower (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221558782.7U CN217974009U (en) | 2022-06-21 | 2022-06-21 | Bridge restraint system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221558782.7U CN217974009U (en) | 2022-06-21 | 2022-06-21 | Bridge restraint system |
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| Publication Number | Publication Date |
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| CN217974009U true CN217974009U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221558782.7U Active CN217974009U (en) | 2022-06-21 | 2022-06-21 | Bridge restraint system |
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| CN (1) | CN217974009U (en) |
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- 2022-06-21 CN CN202221558782.7U patent/CN217974009U/en active Active
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