CN113250072A - Multi-limb bridge pier system with composite cross section - Google Patents
Multi-limb bridge pier system with composite cross section Download PDFInfo
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- CN113250072A CN113250072A CN202110674605.9A CN202110674605A CN113250072A CN 113250072 A CN113250072 A CN 113250072A CN 202110674605 A CN202110674605 A CN 202110674605A CN 113250072 A CN113250072 A CN 113250072A
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- limb
- pier
- sleeve
- energy
- sleeve body
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention provides a multi-limb composite section pier system, which comprises a plurality of limb pier columns and a plurality of groups of connecting beam groups; a plurality of limb pier studs all set up between bridge cushion cap and girder or bent cap, and multiunit tie beam group sets up between the limb pier stud along upper and lower direction interval, including a plurality of power consumption crossbeams of easily changing, and every power consumption crossbeam is connected between two adjacent limb pier studs to form the support system that all has the power consumption crossbeam between every two adjacent limb pier studs. Under the action of horizontal load generated by natural disasters such as earthquake and the like, each limb pier column and the energy-consuming cross beam form a cooperative working whole due to the frame effect; firstly, energy consumption yielding occurs on an easily repaired energy consumption beam to form a first defense line; in the extremely rare earthquake, the limb pier can enter the plasticity to form a second defense line and avoid the structure from collapsing. Compared with the existing bridge pier column, the multi-limb composite section pier system provided by the invention has better disaster-resistant toughness and extreme disaster resistance.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a multi-limb composite section pier system.
Background
The existing pier system is mostly composed of independent sections, only a local deformation mechanism can be utilized under the action of extreme disasters such as earthquake, tsunami and the like, the energy consumption efficiency is low, and a pier column main body is easy to damage, so that the toughness disaster-resistant target of quick repair after disasters cannot be realized.
In addition, the ability of the existing pier system to resist disasters needs to be further improved. For example, the traditional seismic fortification target of 'small earthquake damage prevention, medium earthquake repairable and large earthquake collapse' can not meet the requirement of national economy rapid development of China on the disaster resistance of a bridge structure.
How to improve the pier structure system, and improve the disaster-resistant toughness and the capability of resisting extreme disasters is an urgent need in the current engineering technical field.
Disclosure of Invention
The embodiment of the invention provides a multi-limb composite section pier system, and aims to solve the technical problems of low disaster-resistant toughness and low extreme disaster resistance of a pier structure system in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
provided is a multi-limb composite section pier system, including:
the plurality of limb separating pier columns extend along the vertical direction; the bottom ends of the limb separating pier columns are all used for being supported on a foundation through a bearing component, and the top ends of the limb separating pier columns are all used for being connected with a main beam or a cover beam of a bridge; and
the connecting beam groups are arranged at intervals in the vertical direction and are detachably connected among the plurality of limb pier columns in a horizontal state; the connecting beam group comprises a plurality of energy consumption cross beams; the energy-consuming cross beam is connected between every two adjacent limb pier columns;
under the action of rare earthquakes, the limb pier column bears horizontal extreme loads, and the energy-consuming cross beam yields and consumes energy, so that structural damping is increased, the earthquake energy is dissipated, and a first defense line is formed; through reasonable strength matching relation and/or node strengthening measures, the limb separating pier column can be ensured not to be damaged;
under the action of an extremely rare earthquake, the limb-separating pier column enters plasticity to form a second defense line and ensure that the structure does not collapse.
In one possible implementation, the carrier member includes:
the bearing platform is used for being fixed on a foundation, and the upper surface of the bearing platform is suitable for being connected with the bottom end of the limb pier column so as to bear or distribute the load transmitted by the limb pier column.
In one possible implementation mode, a through hole which is communicated along the axial direction of the limb separating pier column is arranged on the limb separating pier column, and a prestressed tendon is arranged in the through hole;
the upper and lower both ends of prestressing tendons all stretch out the setting of branch limb pier stud, just the lower extreme of prestressing tendons with the cushion cap meets, the upper end of prestressing tendons is used for meeting with bridge bent cap or cushion cap.
In a possible implementation manner, a plurality of insertion holes which are communicated in the vertical direction are formed in the bearing platform, and the plurality of insertion holes are used for correspondingly connecting the plurality of prestressed tendons one by one;
a plurality of anchoring spaces which are communicated with the inserting holes in a one-to-one correspondence mode are arranged on the bottom surface of the bearing platform, and anchorage devices suitable for being in anchoring connection with the prestressed ribs are arranged in the anchoring spaces;
when the anchorage device is connected with the prestressed tendon in an anchoring mode to form an anchoring measure, the upper surface of the locking anchorage device is connected with the bottom of the anchoring space, and the anchoring space limits the prestressed tendon to move upwards relative to the bearing platform.
In a possible realization mode, the top end and/or the bottom end of the limb pier is/are provided with a spherical hinge support which is used for abutting against a bridge capping beam or a main beam or the top surface of the bearing platform, and has tensile and shear resistant effects.
In one possible implementation, the connecting beam set further includes:
the fixing sleeves are sleeved on the branch pier columns in a one-to-one corresponding manner; the energy consumption cross beam is connected between every two adjacent fixed sleeves;
the fixed sleeve is detachably connected with the limb pier stud, and the fixed sleeve is fixedly connected with the energy consumption cross beam; or the fixed sleeve is fixedly connected with the limb pier stud, and the fixed sleeve is detachably connected with the energy consumption cross beam.
In one possible implementation, the harness comprises:
the first sleeve body is sleeved on the limb separating pier stud; and
the second sleeve body is sleeved on the limb separating pier stud and is positioned below the first sleeve body;
the lower surface of the first sleeve body and the upper surface of the second sleeve body are matched to clamp the end part of the energy-consuming beam so as to limit the energy-consuming beam to be separated from the limb pier stud.
In a possible implementation manner, the bottom surface of the first sleeve body and/or the top surface of the second sleeve body is provided with an annular groove, and the end of the energy-consuming beam is provided with a sliding block suitable for being embedded into the annular groove.
In a possible implementation manner, a plurality of first positioning holes penetrating in the vertical direction are formed in the first sleeve, and the plurality of first positioning holes are distributed at intervals along the circumferential direction of the first sleeve;
the second sleeve body is provided with a plurality of second positioning holes which are communicated in the vertical direction, the second positioning holes are distributed at intervals along the circumferential direction of the second sleeve body, and the first positioning holes correspond to the second positioning holes one by one;
the end part of the energy consumption beam is provided with a third positioning hole which is communicated along the vertical direction, and the third positioning hole is suitable for being communicated with the first positioning hole and the second positioning hole which correspond to any one group;
the first cover body with be equipped with the elastic locating pin between the second cover body, the elastic locating pin is suitable for from last to looping through down first locating hole, the third locating hole with the second locating hole is in order to connect the first cover body with the second cover body, so that the first cover body with the second cover body is in and presss from both sides tightly the state of power consumption crossbeam tip.
In a possible implementation manner, a plurality of locking grooves are formed in the bottom surface of the first sleeve body, and the plurality of locking grooves are distributed at intervals along the circumferential direction of the first sleeve body;
the top surface of the second sleeve body is provided with a plurality of clamping connecting rods which are suitable for being correspondingly inserted into the plurality of locking grooves one by one.
The multi-limb composite section pier system provided by the invention has the beneficial effects that:
the bridge is supported through a plurality of limb pier studs, and the relative positions of the plurality of limb pier studs are limited through a plurality of groups of connecting beams, so that the bridge is stably supported.
When natural disasters such as earthquakes and tsunamis occur, each limb pier column bears horizontal loads, the energy consumption cross beam between every two adjacent limb pier columns generates yielding energy firstly, the structural damping is increased, the disaster energy is dissipated, and main structures such as bridge limb pier columns are protected from being damaged. Therefore, the damage which originally occurs in the limb separating pier stud is transferred to the energy consumption cross beam, and the post-disaster function of the bridge can be quickly recovered by replacing the energy consumption cross beam.
The influence principle of natural disasters such as earthquake, tsunami and the like on the bridge pier is the same, so the following contents take the earthquake as an example, and the earthquake is divided into a design earthquake, a rare earthquake and a rare earthquake according to different earthquake magnitudes; specifically, when a design earthquake and a rare earthquake occur, the limb pier column is not subjected to plastic damage, a stable supporting effect is achieved, and the energy-consuming cross beam is replaced in time to quickly recover the function of the bridge;
when an earthquake happens rarely, the energy-consuming cross beams are subjected to plastic deformation one by one to form a first defense line, then the limb pier stud enters the plastic deformation to form a second defense line, and the combination of the two processes has longer reaction time compared with the existing bridge supporting system, prevents the bridge from collapsing to the maximum extent and reduces the disaster loss.
That is to say, the energy-consuming cross beam forms a first defense system for resisting natural disasters, and after the defense system is influenced by long-time disasters, the limb pier stud also enters plasticity to form a second defense system, and the collapse of the bridge structure is prevented to the maximum extent.
Compared with the prior art, the multi-limb composite section pier system provided by the embodiment can realize quick restoration of a bridge structure after earthquake and reduce disaster influence; meanwhile, under extreme disasters, a plurality of defense lines are formed, so that the structure can be prevented from collapsing to the maximum extent, the disaster loss is reduced, and better disaster-resistant toughness and extreme disaster resistance capability are obtained.
Drawings
Fig. 1 is a schematic perspective view of a multi-limb composite cross-section pier system according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 taken along circle A;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a sectional view taken along line B-B of FIG. 3;
FIG. 5 is an enlarged partial view of FIG. 4 taken at circle D;
FIG. 6 is an enlarged partial schematic view taken at circle E in FIG. 4;
FIG. 7 is a sectional view taken along line C-C of FIG. 3;
FIG. 8 is an exploded view of a connection structure used in an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a structure of a platform used in an embodiment of the present invention;
fig. 10 is a schematic view of an exploded structure of a combination of a limb pier and a ball-and-socket joint support according to an embodiment of the present invention;
description of reference numerals:
1. a limb separating pier stud; 11. a through hole; 12. a spherical hinge support; 121. tensile shearing surface; 2. an energy consumption beam; 21. a slider; 22. a third positioning hole; 3. a bearing platform; 31. inserting holes; 32. an anchoring space; 4. prestressed tendons; 41. an anchorage device; 5. fixing a sleeve; 51. a first sleeve body; 511. a first positioning hole; 512. a locking groove; 52. a second sleeve body; 521. a second positioning hole; 522. a clamping and connecting rod; 53. an annular groove; 6. an elastic positioning pin.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 10 together, a multi-limb pier system with composite cross-section according to the present invention will now be described. The multi-limb composite section pier system comprises a plurality of limb pier columns 1 and a plurality of groups of connecting beam groups.
A plurality of branches pier stud 1 all extends the setting along upper and lower direction, that is to say two liang of parallel arrangement in a plurality of branches pier stud 1.
The bottom of the limb pier 1 is used for supporting on the foundation through a bearing component, and the top is used for being connected with a main beam or a cover beam of a bridge. It should be noted that the connection between the top end of the limb pier 1 and the main beam or the capping beam is a common design form in practical use, and is not limited; during actual assembly, the contact surface of the top end of the limb-separating pier column 1 can be judged according to actual conditions, and is not completely limited.
Furthermore, the cross section of the limb pier 1 can adopt round, square or different structural characteristics to achieve the best supporting effect. And the limb pier 1 can be made of concrete, steel pipe concrete or other high-performance materials, and can be assembled in a prefabricating way or cast in place in the actual assembling process.
The plurality of groups of connecting beam groups are arranged at intervals along the vertical direction and are detachably connected among the plurality of limb-separating pier columns 1 in a horizontal state.
Each group of connecting beam comprises a plurality of energy-consuming cross beams 2, and each energy-consuming cross beam 2 is arranged between two adjacent limb pier studs 1, so that at least one energy-consuming cross beam 2 is connected between every two adjacent limb pier studs 1.
When the limb pier stud 1 has a deformation trend in the horizontal direction, the energy-consuming cross beam 2 yields and consumes energy so as to increase structural damping and limit the limb pier stud 1 to generate plastic structural change.
The bridge is supported by the multiple limb pier columns 1, and the relative positions of the multiple limb pier columns 1 are limited by the multiple groups of connecting beam sets, so that the bridge is stably supported.
When natural disasters such as earthquakes and tsunamis occur, each limb pier 1 bears horizontal loads, and the energy dissipation cross beam 2 between two adjacent limb piers 1 generates yielding energy firstly so as to increase structural damping, dissipate disaster energy and protect the main structures such as the limb piers 1 from being damaged. Therefore, the damage which originally occurs to the limb pier stud 1 can be transferred to the energy-consuming cross beam 2, and the post-disaster function of the bridge can be quickly recovered by replacing the energy-consuming cross beam 2.
The influence principle of natural disasters such as earthquake, tsunami and the like on the bridge pier is the same, so the following contents take the earthquake as an example, and the earthquake is divided into a design earthquake, a rare earthquake and a rare earthquake according to different earthquake magnitudes; specifically, when a design earthquake and a rare earthquake occur, the limb pier stud 1 is not subjected to plastic damage, a stable supporting effect is achieved, and the energy-consuming cross beam 2 is replaced in time to enable the bridge function to be quickly recovered;
when an earthquake happens rarely, the energy-consuming cross beams 2 are subjected to plastic deformation one by one to form a first defense line, then the limb-separating pier columns 1 enter the plastic deformation to form a second defense line, and the combination of the two processes has longer reaction time compared with the existing bridge supporting system, prevents the bridge from collapsing to the maximum extent and reduces disaster loss.
That is, the energy consumption beam 2 forms a first defense system for resisting natural disasters, and after the defense system is affected by a long-time disaster, the limb pier 1 also enters plasticity, so that the combined structure of the limb pier 1 and the energy consumption beam 2 forms a second defense system to prevent the collapse of the bridge structure to the maximum extent.
Compared with the prior art, the multi-limb composite section pier system provided by the embodiment can realize quick restoration of a bridge structure after earthquake and reduce disaster influence; meanwhile, under extreme disasters, a plurality of defense lines are formed, so that the structure can be prevented from collapsing to the maximum extent, the disaster loss is reduced, and better disaster-resistant toughness and extreme disaster resistance capability are obtained.
In some embodiments, the above-described feature carrier member may take the configuration shown in FIG. 1. With reference to fig. 1, the load bearing member comprises a platform 3.
The bearing platform 3 is used for being fixed on a foundation below a bridge, adopts a reinforced concrete solid structure with a certain thickness, and the upper surface of the bearing platform is suitable for being connected with the bottom ends of the multiple limb pier columns 1 so as to support the limb pier columns 1.
It should be specially noted that if the distance between two adjacent limb pier columns 1 is large, a plurality of the sockets 3 can be arranged, and whether there is a connection relationship between two adjacent sockets 3 (there may be a connection between two adjacent sockets 3, so that it can be understood that a structure formed by a single socket 3 exists; and there may also be no connection between two adjacent sockets 3, so that it can be understood that two sockets 3 support two/more limb pier columns 1 independently) belongs to the protection scope of the structure of the socket 3.
Through adopting above-mentioned technical scheme, the bottom position of branch limb pier stud 1 is injectd, has improved the structural strength of this system to and the reliability when being applicable to the bridge and supporting.
In some embodiments, the above-described feature of the limb pier 1 can be configured as shown in figures 4 to 6. Referring to fig. 4 to 6, the limb-separating pier stud 1 is provided with a through hole 11 which is through along the axial direction of the limb-separating pier stud, and a prestressed tendon 4 is arranged in the through hole 11.
The upper end and the lower end of the prestressed tendon 4 extend out of the limb-separating pier stud 1, the lower end of the prestressed tendon 4 is connected with the bearing platform 3, and the upper end of the prestressed tendon 4 is used for being connected with a capping beam or a main beam of a bridge.
Through adopting above-mentioned technical scheme, prestressing tendons 4 can improve the joint strength of branch pier stud 1 and bridge, cushion cap 3, has improved the branch pier stud 1 that this embodiment mentioned and to the support effect of bridge, has improved the stability of this structure.
In some embodiments, the above-described feature platform 3 may adopt a structure as shown in fig. 4 to 6. Referring to fig. 4 to 6, a plurality of inserting holes 31 penetrating in the vertical direction are formed in the bearing platform 3, and the plurality of inserting holes 31 are used for inserting the plurality of prestressed tendons 4 in a one-to-one correspondence manner.
The bottom surface of the bearing platform 3 is provided with a plurality of anchoring spaces 32 which are correspondingly communicated with the plurality of inserting holes 31 one by one, and anchorage devices 41 which are suitable for being anchored and connected with the inserting parts of the corresponding prestressed tendons 4 are arranged in the anchoring spaces 32. It should be noted that the anchor 41 is a nut, and the anchoring form is a threaded connection.
When the anchorage device 41 is in anchoring engagement with the tendon 4 to form an anchoring measure (i.e. when the anchorage device 41 is in threaded engagement with the tendon 4), the upper surface of the anchorage device 41 engages the bottom of the anchoring space 32 which limits upward movement of the tendon 4 relative to the platform 3.
By adopting the technical scheme, the anchorage device 41 is matched with the prestressed tendon 4, the prestressed tendon 4 can be limited from moving upwards relative to the bearing platform 3, and the bearing platform 3 is connected with the bottom surface, so that the prestressed tendon 4 can be limited from being separated from the bearing platform 3, the stability of the structure is improved, and the safety of the structure is applied to the municipal transportation stage.
It should be noted that different tendons 4 have different anchoring forms, and the anchoring form of the anchor 41 and the tendons 4 is only one of them, and since the main protection content of this party is not included here, this is not proposed as a limitation, but plays a role in supplementary explanation.
In some embodiments, the above-described feature of the limb pier 1 can be configured as shown in figures 3 and 4. Referring to fig. 3 and 4, the upper end and/or the lower end of the limb pier 1 is provided with a ball-and-socket joint support 12, the ball-and-socket joint support 12 has tensile and shear resistant effects, and in the embodiment, the ball-and-socket joint support 12 has a tensile and shear resistant surface 121 for abutting against the bottom surface of the bridge or the top surface of the platform 3.
By adopting the technical scheme, when the buckling phenomenon of the bottom surface of the bridge or the top surface of the bearing platform 3 occurs, the tensile shearing surface 121 of the spherical hinge support 12 can resist certain tensile force and shearing force, and meanwhile, the tensile force and the shearing force are transmitted to the limb pier stud 1, so that the stability of the structure is improved, and the reliability of actual operation in the transferring process of the damaged part is improved.
In the actual use process, how to connect the limb pier stud 1 and the energy consumption cross beam 2 is also a very troublesome problem; the inventor finds in long-term technical research that the connection is carried out in an embedded mode, so that the end part of the energy-consuming cross beam 2 is embedded into the reserved space of the limb pier stud 1, and therefore a stable connection relationship is obtained, but the defect that the disassembly and the reassembly of the energy-consuming cross beam 2 take time exists, and in order to solve the technical defect, when only one energy-consuming cross beam 2 is limited to be connected between two limb pier studs 1, the following technical scheme is proposed:
in some embodiments, the above-described set of characteristic connecting beams may be configured as shown in FIG. 1. Referring to fig. 1, the connecting beam set further comprises a plurality of fixing sleeves 5.
The fixing sleeves 5 are sleeved on the branch pier studs 1 in a one-to-one correspondence manner, so that an energy-consuming cross beam 2 is connected between every two adjacent fixing sleeves 5.
Wherein, the fixed sleeve 5 is detachably connected with the limb pier stud 1, and the fixed sleeve 5 is fixedly connected with the energy consumption beam 2; or the fixed sleeve 5 is fixedly connected with the limb pier stud 1, and the fixed sleeve 5 is detachably connected with the energy consumption cross beam 2.
By adopting the technical scheme, the detachment and installation of the limb pier stud 1 and the energy consumption cross beam 2 can be realized by the separation fixing sleeve 5 and the limb pier stud 1/the separation fixing sleeve 5 and the energy consumption cross beam 2, the detachment and reassembly efficiency of the energy consumption cross beam 2 is effectively improved, and the reliability of the system in practical application is improved.
It should be noted that the fixing sleeve 5 and the limb pier 1 can be fixedly connected at any time, and the fixing connection means includes, but is not limited to, bolts, rivets, etc. which are disclosed in the prior art, and is not limited thereto.
In some embodiments, the above-described feature of the holster 5 may be configured as shown in fig. 3. With reference to fig. 3, the sleeve 5 comprises a first sleeve body 51 and a second sleeve body 52.
The first sleeve body 51 is sleeved on the limb separating pier 1.
The second sleeve body 52 is sleeved on the limb separating pier 1 and is positioned below the first sleeve body 51.
Wherein, the lower surface of the first sleeve body 51 and the upper surface of the second sleeve body 52 cooperate to clamp the end of the energy consumption beam 2, so as to limit the energy consumption beam 2 from separating from the limb pier stud 1.
Specifically, the first sleeve 51 and the second sleeve 52 have a first relative position and a second relative position therebetween; when the first sleeve 51 and the second sleeve 52 are in the first relative position, the distance between the first sleeve 51 and the second sleeve 52 is equal to the thickness of the dissipative cross beam 2 in the up-down direction, so as to be suitable for clamping the end of the dissipative cross beam 2.
When the first sleeve 51 and the second sleeve 52 are in the second relative position, the distance between the first sleeve 51 and the second sleeve 52 is greater than the thickness of the energy consumption beam 2 along the up-down direction.
Through adopting above-mentioned technical scheme, the relative position of adjustment first cover 51 and second cover 52 can realize the loading and unloading of power consumption crossbeam 2, efficiency when further having optimized the bridge maintenance, has improved the reliability of this structure in being applied to municipal transportation in-process.
In some embodiments, the first sleeve 51 and the second sleeve 52 can be constructed as shown in FIG. 5. Referring to fig. 5, the bottom surface of the first sleeve body 51 and/or the top surface of the second sleeve body 52 is provided with an annular groove 53, and the end of the energy consumption beam 2 is provided with a slide block 21 adapted to be inserted into the annular groove 53.
By adopting the technical scheme, the combined structure of the annular groove 53 and the sliding block 21 can limit the energy consumption beam 2 from being separated from the first sleeve 51 and the second sleeve 52, so that the structural strength and stability of the device are improved.
In some embodiments, the first sleeve 51, the second sleeve 52 and the energy consumption beam 2 can adopt the structure shown in fig. 5. Referring to fig. 5, the first sleeve body 51 is provided with a plurality of first positioning holes 511 penetrating in the vertical direction, and the plurality of first positioning holes 511 are distributed at intervals along the circumferential direction of the first sleeve body 51.
The second sleeve 52 is provided with a plurality of second positioning holes 521 penetrating in the vertical direction, the plurality of second positioning holes 521 are distributed at intervals along the circumferential direction of the second sleeve 52, and the plurality of first positioning holes 511 and the plurality of second positioning holes 521 correspond to each other one by one.
The end of the energy consumption beam 2 is provided with a third positioning hole 22 penetrating along the up-down direction, and the third positioning hole 22 is suitable for being communicated with any one group of the corresponding first positioning hole 511 and the second positioning hole 521.
An elastic positioning pin 6 is arranged between the first sleeve body 51 and the second sleeve body 52, and the elastic positioning pin 6 is suitable for connecting the first sleeve body 51 and the second sleeve body 52 sequentially through the first positioning hole 511, the third positioning hole 22 and the second positioning hole 521 from top to bottom so that the first sleeve body 51 and the second sleeve body 52 are in a state of clamping the end part of the energy consumption beam 2, namely, in a first relative position.
By adopting the above technical scheme, after the elastic positioning pin 6 is added into the first positioning hole 511, the third positioning hole 22 and the second positioning hole 521, the first sleeve 51 and the second sleeve 52 can be limited to be at the first relative position, so that the first sleeve 51 and the second sleeve 52 are prevented from being separated, and the structural stability of the device is improved.
It should be added that, in this embodiment, the elastic positioning pin 6 is an R-shaped pin commonly used in the prior art, and the specific use process and principle are the prior art and will not be described herein again.
In some embodiments, the first sleeve 51 and the second sleeve 52 can be constructed as shown in FIG. 8. Referring to fig. 8, the bottom surface of the first sleeve body 51 is provided with a plurality of locking grooves 512, and the plurality of locking grooves 512 are distributed at intervals along the circumferential direction of the first sleeve body 51;
the top surface of the second sleeve 52 is provided with a plurality of clamping rods 522 adapted to be inserted into the plurality of locking grooves 512 in a one-to-one correspondence.
Through adopting above-mentioned technical scheme, locking groove 512 and joint pole 522 are mutually supported, can restrict first sleeve 51 for second sleeve 52 along the rotation of self circumference, have improved structural stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multi-limb composite section pier system is characterized by comprising:
the plurality of limb separating pier columns extend along the vertical direction; the bottom ends of the limb separating pier columns are all used for being supported on a foundation through a bearing component, and the top ends of the limb separating pier columns are all used for being connected with a main beam or a cover beam of a bridge; and
the connecting beam groups are arranged at intervals in the vertical direction and are detachably connected among the plurality of limb pier columns in a horizontal state; the connecting beam group comprises a plurality of energy consumption cross beams; the energy-consuming cross beam is connected between every two adjacent limb pier columns;
under the action of rare earthquakes, the limb pier column bears horizontal extreme loads, and the energy-consuming cross beam yields and consumes energy, so that structural damping is increased, the earthquake energy is dissipated, and a first defense line is formed; through reasonable strength matching relation and/or node strengthening measures, the limb separating pier column can be ensured not to be damaged;
under the action of an extremely rare earthquake, the limb-separating pier column enters plasticity to form a second defense line and ensure that the structure does not collapse.
2. The multi-limb composite-section pier system of claim 1, wherein the load bearing member comprises:
the bearing platform is used for being fixed on a foundation, and the upper surface of the bearing platform is suitable for being connected with the bottom end of the limb pier column so as to bear or distribute the load transmitted by the limb pier column.
3. The multi-limb composite section pier system of claim 2, wherein the limb-separating pier column is provided with a through hole which is axially penetrated along the limb-separating pier column, and a prestressed tendon is arranged in the through hole;
the upper and lower both ends of prestressing tendons all stretch out the setting of branch limb pier stud, just the lower extreme of prestressing tendons with the cushion cap meets, the upper end of prestressing tendons is used for meeting with bridge bent cap or cushion cap.
4. The pier system with the multi-limb composite cross section as claimed in claim 3, wherein a plurality of insertion holes which are penetrated through in the vertical direction are formed in the bearing platform, and the plurality of insertion holes are used for one-to-one corresponding connection of the prestressed tendons;
a plurality of anchoring spaces which are communicated with the inserting holes in a one-to-one correspondence mode are arranged on the bottom surface of the bearing platform, and anchorage devices suitable for being in anchoring connection with the prestressed ribs are arranged in the anchoring spaces;
when the anchorage device is connected with the prestressed tendon in an anchoring mode to form an anchoring measure, the upper surface of the locking anchorage device is connected with the bottom of the anchoring space, and the anchoring space limits the prestressed tendon to move upwards relative to the bearing platform.
5. The multi-limb composite section pier system according to claim 2, wherein the top end and/or the bottom end of the pier stud is provided with a ball hinge support which is used for abutting against a bridge capping beam or a main beam or the top surface of the bearing platform and has tensile and shear resistant effects.
6. The multi-limb composite section pier system of claim 1, wherein the set of connecting beams further comprises:
the fixing sleeves are sleeved on the branch pier columns in a one-to-one corresponding manner; the energy consumption cross beam is connected between every two adjacent fixed sleeves;
the fixed sleeve is detachably connected with the limb pier stud, and the fixed sleeve is fixedly connected with the energy consumption cross beam; or the fixed sleeve is fixedly connected with the limb pier stud, and the fixed sleeve is detachably connected with the energy consumption cross beam.
7. The multi-limb composite section pier system of claim 6, wherein the fixture sleeve comprises:
the first sleeve body is sleeved on the limb separating pier stud; and
the second sleeve body is sleeved on the limb separating pier stud and is positioned below the first sleeve body;
the lower surface of the first sleeve body and the upper surface of the second sleeve body are matched to clamp the end part of the energy-consuming beam so as to limit the energy-consuming beam to be separated from the limb pier stud.
8. The pier system with multiple limbs and composite sections as claimed in claim 7, wherein the bottom surface of the first housing and/or the top surface of the second housing is provided with an annular groove, and the end of the energy-consuming beam is provided with a sliding block adapted to be inserted into the annular groove.
9. The multi-limb composite section pier system of claim 7, wherein the first sleeve is provided with a plurality of first positioning holes which penetrate along the vertical direction, and the plurality of first positioning holes are distributed at intervals along the circumferential direction of the first sleeve;
the second sleeve body is provided with a plurality of second positioning holes which are communicated in the vertical direction, the second positioning holes are distributed at intervals along the circumferential direction of the second sleeve body, and the first positioning holes correspond to the second positioning holes one by one;
the end part of the energy consumption beam is provided with a third positioning hole which is communicated along the vertical direction, and the third positioning hole is suitable for being communicated with the first positioning hole and the second positioning hole which correspond to any one group;
the first cover body with be equipped with the elastic locating pin between the second cover body, the elastic locating pin is suitable for from last to looping through down first locating hole, the third locating hole with the second locating hole is in order to connect the first cover body with the second cover body, so that the first cover body with the second cover body is in and presss from both sides tightly the state of power consumption crossbeam tip.
10. The pier system with multiple limbs and composite sections as claimed in claim 7, wherein the bottom surface of the first sleeve body is provided with a plurality of locking grooves, and the plurality of locking grooves are distributed at intervals along the circumferential direction of the first sleeve body;
the top surface of the second sleeve body is provided with a plurality of clamping connecting rods which are suitable for being correspondingly inserted into the plurality of locking grooves one by one.
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| CN113250072B (en) | 2022-10-04 |
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