Bridge tough anti-seismic system with replaceable column end plastic hinge area and installation method

Abstract

The invention is suitable for the technical field of earthquake resistance of bridge engineering, and provides a bridge toughness earthquake-resistant system with a replaceable column end plastic hinge area and a mounting method. The system comprises a bent cap, a pier, a bearing platform and a first plastic hinge, the capping beam is arranged at the upper end of the pier, and the lower end of the pier is detachably connected with the bearing platform through the first plastic hinge; the first plastic hinge comprises a first partition plate, a second partition plate, a plastic hinge longitudinal bar and a supporting mechanism; the first partition plate is detachably connected with the pier, and the second partition plate is detachably connected with the bearing platform. The two ends of the plastic hinge longitudinal bars are detachably arranged between the first partition plate and the second partition plate, the supporting mechanism is fixed between the first partition plate and the second partition plate, and the supporting mechanism is located in an inner area defined by the plastic hinge longitudinal bars; high-ductility concrete is poured between the first partition plate and the second partition plate, and the plastic hinge longitudinal bars and the supporting mechanisms are arranged in the concrete. The damage mode can be effectively controlled, the bridge can be effectively prevented from collapsing, and high repairability is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering earthquake resistance, and in particular to a bridge toughness earthquake resistance system with replaceable plastic hinge areas at column ends and an installation method. Background Art

[0002] With the continuous advancement of urbanization, the importance of transportation networks in modern cities has become increasingly prominent. As a core component of transportation infrastructure, bridges play a vital role in ensuring smooth urban traffic, promoting economic development, and enhancing social functions. As the main choice for traditional bridge seismic design, the bridge ductile seismic system sets ductile components and combines capacity protection design methods to ensure that key structural components are not damaged, give full play to the deformation capacity of ductile components, dissipate earthquake input energy, effectively prevent bridge structure collapse, and greatly protect life safety and reduce direct economic losses.

[0003] However, the traditional ductile seismic system uses the plastic deformation of the plastic hinge area of ​​the ductile member to dissipate the seismic energy, which may cause serious damage and destruction. The residual deformation of the pier top after the earthquake is large, which is difficult to repair, restricting the rapid recovery of traffic functions after the earthquake, and having a serious impact on the recovery of urban functions and social and economic activities. Therefore, how to improve the post-earthquake recovery capacity of the plastic hinge at the end of the ductile member of the bridge column while ensuring the safety of the structure has become an important challenge facing the design of the ductile seismic system of the bridge. Summary of the invention

[0004] In view of this, an embodiment of the present application provides a bridge toughness seismic resistance system and installation method with replaceable plastic hinge areas at column ends, which can effectively prevent bridge collapse and has strong repairability.

[0005] In order to achieve the above purpose, this application adopts the following technical solutions: In a first aspect, an embodiment of the present application provides a bridge toughness seismic resistance system with a replaceable plastic hinge area at a column end, comprising a cap beam, a pier and a cap, and further comprising a first plastic hinge; the cap beam is arranged at the upper end of the pier, and the lower end of the pier is detachably connected to the cap through the first plastic hinge; The first plastic hinge comprises a first partition plate, a second partition plate, a plastic hinge longitudinal reinforcement and a supporting mechanism; the first partition plate is detachably connected to the pier, and the second partition plate is detachably connected to the cap; the plastic hinge longitudinal reinforcement is arranged between the first partition plate and the second partition plate, and both ends are detachably connected to the first partition plate and the second partition plate; the supporting mechanism is fixed between the first partition plate and the second partition plate, and the supporting mechanism is located in the inner area surrounded by the plastic hinge longitudinal reinforcement; High-ductility concrete is poured between the first partition plate and the second partition plate, and the plastic hinged longitudinal reinforcement and the supporting mechanism are arranged in the concrete.

[0006] Based on the first aspect, in some embodiments, the first plastic hinge further comprises a steel bar connection lengthened fixed inner sleeve, a steel bar connection outer sleeve and a steel bar connection movable inner sleeve; One end of the steel bar connection extended fixed inner sleeve is fixed to the lower side of the first partition plate, and the other end of the steel bar connection extended fixed inner sleeve is connected to the steel bar connection movable inner sleeve through the steel bar connection outer sleeve; the steel bar connection movable inner sleeve is provided with a groove with a circular cross-section, the depth direction of the groove is consistent with the axial direction of the steel bar connection movable inner sleeve, and the inner side wall of the groove is provided with an internal thread; The upper end of the plastic hinged longitudinal reinforcement is provided with an external thread, and the upper end of the plastic hinged longitudinal reinforcement is threadedly connected to the steel bar connecting movable inner sleeve.

[0007] Based on the first aspect, in some embodiments, the first plastic hinge further includes a first steel bar connecting sleeve, the first steel bar connecting sleeve is fixed to the upper side of the second partition plate, and the lower end of the plastic hinge longitudinal reinforcement is connected to the first steel bar connecting sleeve.

[0008] Based on the first aspect, in some embodiments, the first plastic hinge further includes a second steel bar connecting sleeve and a third steel bar connecting sleeve; the second steel bar connecting sleeve is fixed to the upper side of the first partition plate, and the third steel bar connecting sleeve is fixed to the lower side of the second partition plate; The pier is provided with pier longitudinal reinforcement, and the pier longitudinal reinforcement is connected to the second steel bar connecting sleeve; the cap is provided with partition plate anchor reinforcement, and the upper end of the partition plate anchor reinforcement is connected to the third steel bar connecting sleeve.

[0009] Based on the first aspect, in some embodiments, the number of plastic hinge longitudinal bars is multiple, and the first plastic hinge 400 further includes multiple first plastic hinge stirrups and multiple second plastic hinge stirrups, and each first plastic hinge stirrup 471 is wrapped around the outside of each plastic hinge longitudinal bar and connected to each plastic hinge longitudinal bar; In the length direction of the plastic hinged longitudinal reinforcement, the first plastic hinged stirrups and the second plastic hinged stirrups are divided into multiple layers, each layer includes a first plastic hinged stirrup and multiple second plastic hinged stirrups, and each first plastic hinged stirrup is evenly distributed on the plastic hinged longitudinal reinforcement; each plastic hinged longitudinal reinforcement forms a quadrilateral, and at the four corners of the quadrilateral, the second plastic hinged stirrups are connected to two plastic hinged longitudinal reinforcements, and the second plastic hinged stirrups and the first plastic hinged stirrups form a triangle.

[0010] Based on the first aspect, in some embodiments, the supporting structure is a plastic hinge steel frame, and the cross-section of the plastic hinge steel frame is I-shaped.

[0011] Based on the first aspect, in some embodiments, a plurality of protrusions are provided on both sides of the plastic hinge steel frame.

[0012] Based on the first aspect, in some embodiments, a second plastic hinge is provided between the cap beam and the pier, and the structure of the second plastic hinge is the same as that of the first plastic hinge.

[0013] In a second aspect, an embodiment of the present application provides a method for installing a bridge toughness seismic resistance system with a replaceable plastic hinge area at a column end, which is applied to the bridge toughness seismic resistance system with a replaceable plastic hinge area at a column end as described in the first aspect, and the method comprises: The upper surface of the first partition plate is welded to the second steel bar connecting sleeve, and the lower surface of the first partition plate is welded to the steel bar connecting extended fixed inner sleeve; The upper surface of the second partition plate is welded to the first steel bar connecting sleeve, and the lower surface of the second partition plate is welded to the third steel bar connecting sleeve; welding the supporting mechanism to the first partition plate and the second partition plate; Connect the longitudinal reinforcement of the pier to the first partition plate through the second reinforcement connection sleeve, and connect the anchor reinforcement of the partition plate to the second partition plate through the third reinforcement connection sleeve; The steel bar connection outer sleeve is connected to the steel bar connection extension fixed inner sleeve on the first partition plate, and is screwed to the uppermost thread of the steel bar connection extension fixed inner sleeve; the lower part of the plastic hinged longitudinal reinforcement is connected to the second partition plate through the first steel bar connection sleeve; Connect the upper part of the plastic hinged longitudinal reinforcement with the movable inner sleeve of the steel bar connection, then screw the outer sleeve of the steel bar connection downward, and connect the extended fixed inner sleeve of the steel bar connection and the movable inner sleeve of the steel bar connection through the outer sleeve of the steel bar connection; The upper connection joint and the lower connection joint of the plastic hinged longitudinal reinforcement are wrapped with masking tape, and high-ductility concrete is poured; wherein, the upper connection joint is a connection joint composed of the upper part of the plastic hinged longitudinal reinforcement, the steel bar connection extended fixed inner sleeve, the steel bar connection outer sleeve and the steel bar connection movable inner sleeve, and the lower connection joint is a connection joint composed of the lower part of the plastic hinged longitudinal reinforcement and the first steel bar connection sleeve.

[0014] Based on the second aspect, in some embodiments, the method further includes: When repairing the replaceable bridge toughness seismic resistance system in the plastic hinge area at the column end, remove the damaged outer layer of concrete, untie the masking tape, take down the obsolete plastic hinge longitudinal reinforcement, replace it with a new one, wrap the upper and lower connection joints of the new plastic hinge longitudinal reinforcement with masking tape, and re-pour the concrete.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: In the embodiment of the present application, the earthquake damage is concentrated on the first plastic hinge, and the damage to the plastic hinge will not change the force transmission path of the earthquake-resistant system, so the damage mode is controllable and can effectively prevent the bridge from collapsing. In addition, after the first plastic hinge is damaged, a new first plastic hinge can be easily replaced, and the built-in support mechanism can support the entire superstructure during repair without the need for additional support measures, thereby making the earthquake-resistant system highly repairable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art 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 paying creative labor.

[0017] Figure 1 A schematic structural diagram of a bridge toughness seismic-resistant system with replaceable plastic hinge areas at column ends provided in an embodiment of the present application; Figure 2 A schematic diagram of another structure of a bridge toughness seismic resistance system with replaceable plastic hinge areas at column ends provided in an embodiment of the present application; Figure 3 for Figure 1 The structure of part A and Figure 2 Schematic diagram of the three-dimensional structure of the structure of part A in the middle; Figure 4 A schematic diagram of the structure of a bridge pier, a first plastic hinge and a cap provided in an embodiment of the present application; Figure 5 for Figure 4 A schematic diagram of the structure of the B part; Figure 6 A schematic diagram of the internal structure of a first plastic hinge provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of the support mechanism provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The present application is described more clearly below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the effects of the present application, but are not intended to limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application. These all fall within the scope of protection of the present application.

[0019] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0020] Based on the problems raised in the background technology, this application and this patent proposes a concept of "replaceable plastic hinge" and designs corresponding structural forms and construction methods to achieve simple and quick repair of bridges after an earthquake, quickly restore bridge functions, ensure smooth traffic after a disaster, and assist in the smooth implementation of post-disaster rescue and the rapid recovery of social and economic activities.

[0021] In some application scenarios, the bridge toughness seismic resistance system with replaceable column end plastic hinge areas provided in the present application may include a cap beam, a pier, a base and a first plastic hinge, wherein the cap beam is arranged at the upper end of the pier, and the lower end of the pier is detachably connected to the base through the first plastic hinge.

[0022] In some other application scenarios, the bridge toughness seismic resistance system with replaceable column end plastic hinge area provided by the present application may include a cap beam, a pier, a cap, a first plastic hinge, and a second plastic hinge. The lower end of the pier is detachably connected to the cap through the first plastic hinge, and the upper end of the pier is detachably connected to the cap beam through the second plastic hinge. The first plastic hinge and the second plastic hinge have the same structure.

[0023] The embodiment of the present application concentrates earthquake damage on the first plastic hinge and / or the second plastic hinge, and the damage to the plastic hinge will not change the force transmission path of the earthquake-resistant system, so the failure mode is controllable and can effectively prevent the bridge from collapsing. In addition, after the first plastic hinge and / or the second plastic hinge are damaged, a new first plastic hinge and / or the second plastic hinge can be easily replaced, so that the earthquake-resistant system has strong repairability.

[0024] The following combination Figures 1 to 7 The embodiments of the present application are described in detail.

[0025] See also Figure 1 and Figure 3 In some embodiments, the bridge toughness seismic resistance system with replaceable column end plastic hinge area may include a cap beam 100, a cap 200, a pier 300 and a first plastic hinge 400. The cap beam 100 is disposed at the upper end of the pier 300, and the lower end of the pier 300 is detachably connected to the cap 200 through the first plastic hinge 400.

[0026] Specifically, the first plastic hinge 400 may include a first partition plate 410, a second partition plate 420, a plastic hinge longitudinal reinforcement 430 and a support mechanism 440. The first partition plate 410 is detachably connected to the pier 300, and the second partition plate 420 is detachably connected to the cap 200. The plastic hinge longitudinal reinforcement 430 is disposed between the first partition plate 410 and the second partition plate 420, and both ends are detachably connected to the first partition plate 410 and the second partition plate 420. The support mechanism 440 is fixed between the first partition plate 410 and the second partition plate 420, and the support mechanism 440 is located in the internal area surrounded by the plastic hinge longitudinal reinforcement 430. High ductility concrete 450 is poured between the first partition plate 410 and the second partition plate 420, and the plastic hinge longitudinal reinforcement 430 and the support mechanism 440 are disposed in the high ductility concrete 450.

[0027] Among them, covering the plastic hinge with 450 high-ductility concrete can enhance the plastic deformation capacity of the plastic hinge area, inhibit the development of cracks, and reduce post-earthquake damage.

[0028] See also Figure 2 and Figure 3 In some embodiments, the bridge toughness seismic resistance system with replaceable column end plastic hinge area may include a cap beam 100, a cap 200, a pier 300, a first plastic hinge 400 and a second plastic hinge 500. For the positional connection relationship between the first plastic hinge 400 and the cap 200 and the pier 300, and the structure of the first plastic hinge 400, please refer to Figure 1 and Figure 3 The second plastic hinge 500 has the same structure as the first plastic hinge 400, and the second plastic hinge 500 includes two partition plates, plastic hinge longitudinal ribs and a support mechanism.

[0029] Specifically, the lower partition plate of the two partition plates of the second plastic hinge 500 is detachably connected to the bridge pier, and the upper partition plate of the two partition plates of the second plastic hinge 500 is detachably connected to the cap beam. The two ends of the plastic hinge longitudinal reinforcement of the second plastic hinge 500 are detachably arranged between the two partition plates of the second plastic hinge 500, and the supporting mechanism of the second plastic hinge 500 is fixed between the two partition plates of the second plastic hinge 500, and the supporting mechanism of the second plastic hinge 500 is located in the inner area surrounded by the plastic hinge longitudinal reinforcement of the second plastic hinge 500. Concrete is poured between the two partition plates of the second plastic hinge 500, and the plastic hinge longitudinal reinforcement and the supporting mechanism of the second plastic hinge 500 are arranged in the concrete.

[0030] It can be seen that the embodiment of the present application concentrates the earthquake damage on the first plastic hinge 400 and / or the second plastic hinge 500, and the damage to the plastic hinge will not change the force transmission path of the seismic resistance system, so the failure mode is controllable and can effectively prevent the collapse of the bridge; the plastic hinge is covered with high-ductility concrete, which has a stronger energy absorption capacity than ordinary concrete, and together with the plastic hinge longitudinal reinforcement, it can provide considerable energy absorption capacity for the seismic resistance system; after the first plastic hinge and / or the second plastic hinge are destroyed, only the plastic hinge longitudinal reinforcement and the covering concrete need to be repaired. During the repair, the built-in support mechanism can support the entire superstructure without the need to add additional temporary support measures, thereby making the seismic resistance system have strong repairability.

[0031] See also Figure 5 In some embodiments, the first plastic hinge 400 may further include a steel bar connection extended fixed inner sleeve 461, a steel bar connection outer sleeve 462 and a steel bar connection movable inner sleeve 463.

[0032] Specifically, one end of the steel bar connection extended fixed inner sleeve 461 is fixed to the lower side of the first partition plate 410, and the other end of the steel bar connection extended fixed inner sleeve 461 is connected to the steel bar connection movable inner sleeve 463 through the steel bar connection outer sleeve 462. The steel bar connection movable inner sleeve 463 is provided with a groove with a circular cross section, the depth direction of the groove is consistent with the axial direction of the steel bar connection movable inner sleeve 463, and the inner side wall of the groove is provided with an internal thread; the upper end of the plastic hinge longitudinal bar 430 is provided with an external thread, and the upper end of the plastic hinge longitudinal bar 430 is threadedly connected to the steel bar connection movable inner sleeve 463.

[0033] In some embodiments, see Figure 3 and Figure 4 The first plastic hinge 400 may further include a first steel bar connection sleeve 464 , which is fixed to the upper side of the second partition plate 430 , and the lower end of the plastic hinge longitudinal reinforcement 430 is connected to the first steel bar connection sleeve 464 .

[0034] For example, the lower end of the plastic hinged longitudinal bar 430 may be provided with an external thread, the first steel bar connecting sleeve 464 may be provided with an internal thread, and the lower end of the plastic hinged longitudinal bar 430 is connected to the first steel bar connecting sleeve 464 through threads.

[0035] One end of the plastic hinged longitudinal reinforcement 430 is connected to the cap beam 100 and the pedestal 200 through the first steel bar connecting sleeve 464, and the other end is connected to the pier 300 through the steel bar connecting extended fixed inner sleeve 461, the steel bar connecting movable inner sleeve 463, and the steel bar connecting outer sleeve 462, which is convenient for disassembly and replacement and improves the structural repairability.

[0036] In this embodiment, the upper connection joint and the lower connection joint of the plastic hinged longitudinal reinforcement 430 can be wrapped with masking tape, and then the high ductility concrete 440 is poured. Among them, the upper connection joint is a connection joint composed of the upper part of the plastic hinged longitudinal reinforcement 430, the steel bar connection extension fixed inner sleeve 461, the steel bar connection outer sleeve 462 and the steel bar connection movable inner sleeve 463, and the lower connection joint is a connection joint composed of the lower part of the plastic hinged longitudinal reinforcement 430 and the first steel bar connection sleeve 464.

[0037] In some embodiments, see Figure 3 and Figure 4 The first plastic hinge 400 may further include a second steel bar connection sleeve 465 and a third steel bar connection sleeve 466. The second steel bar connection sleeve 465 is fixed to the upper side of the first partition plate 410, and the third steel bar connection sleeve 466 is fixed to the lower side of the second partition plate 420.

[0038] Specifically, the pier 300 is provided with a pier longitudinal reinforcement 301 , which is connected to the second steel bar connecting sleeve 465 ; the cap 200 is provided with a partition plate anchor reinforcement 201 , and the upper end of the partition plate anchor reinforcement 201 is connected to the third steel bar connecting sleeve 466 .

[0039] For example, the lower end of the pier longitudinal reinforcement 301 can be provided with an external thread, the second steel bar connecting sleeve 465 can be provided with an internal thread, and the lower end of the pier longitudinal reinforcement 301 is threadedly connected to the second steel bar connecting sleeve 465; the upper end of the partition plate anchor bar 201 can be provided with an external thread, the third steel bar connecting sleeve 466 can be provided with an internal thread, and the upper end of the partition plate anchor bar 201 is threadedly connected to the third steel bar connecting sleeve 466.

[0040] In some embodiments, see Figure 3 , Figure 4 and Figure 6 The number of plastic hinge longitudinal bars 430 is multiple, and the first plastic hinge 400 can also include multiple first plastic hinge stirrups 471 and multiple second plastic hinge stirrups 472. Each first plastic hinge stirrup 471 is wrapped around the outside of each plastic hinge longitudinal bar 430 and connected to each plastic hinge longitudinal bar 430.

[0041] Specifically, in the length direction of the plastic hinge longitudinal reinforcement 430, the first plastic hinge stirrup 471 and the second plastic hinge stirrup 472 can be divided into multiple layers, each layer includes a first plastic hinge stirrup 471 and multiple second plastic hinge stirrups 472, and each first plastic hinge stirrup 471 is evenly distributed on the plastic hinge longitudinal reinforcement 430. Figure 6 The plastic hinge longitudinal bars 430 are surrounded by a quadrilateral. At the four corners of the quadrilateral, the second plastic hinge stirrups 472 are connected to the two plastic hinge longitudinal bars 430. The second plastic hinge stirrups 472 and the first plastic hinge stirrups 471 form a triangle.

[0042] In this embodiment, the first plastic hinge stirrup 471 is wrapped around the outside of each plastic hinge longitudinal reinforcement 430 and connected to each plastic hinge longitudinal reinforcement 430, and the second plastic hinge stirrup 472 is connected to the two plastic hinge longitudinal reinforcements 430, which can further enhance the stability between the structures of each plastic hinge longitudinal reinforcement 430.

[0043] In some embodiments, the support structure 440 may be a plastic hinge steel frame, and the cross section of the plastic hinge steel frame may be an I-shape, such as Figure 6 and Figure 7 The two ends of the plastic hinge steel frame are respectively welded to the first partition plate 410 and the second partition plate 420. In other embodiments, the cross-section of the plastic hinge steel frame may be in other shapes, such as E-shaped, F-shaped or groove-shaped.

[0044] Optionally, multiple protrusions 441 may be provided on both sides of the plastic hinge steel frame. Providing multiple protrusions 441 can enhance the bonding force between the support mechanism 440 and the high ductility concrete. The specific shape of the protrusions 441 is not limited in the embodiment of the present application.

[0045] The embodiment of the present application concentrates earthquake damage on the plastic hinge, and the destruction of the plastic hinge will not change the force transmission path of the seismic resistance system, so the failure mode is controllable and can effectively prevent the collapse of the bridge; the plastic hinge is covered with high-ductility concrete, which has a stronger energy absorption capacity than ordinary concrete, and together with the plastic hinge longitudinal reinforcement, it can provide considerable energy absorption capacity for the seismic resistance system; after the first plastic hinge and / or the second plastic hinge are destroyed, it is only necessary to repair the plastic hinge longitudinal reinforcement and the covering concrete. During the repair, the built-in support mechanism can support the entire superstructure without the need to add an additional support system. The local steel bar replacement measures are simple, thereby making the seismic resistance system highly repairable.

[0046] Based on the above-mentioned bridge toughness seismic resistance system with replaceable column end plastic hinge area, the embodiment of the present application also provides an installation method of the bridge toughness seismic resistance system with replaceable column end plastic hinge area, comprising the following steps: Step A, welding the upper surface of the first partition plate to the second steel bar connecting sleeve, and welding the lower surface of the first partition plate to the steel bar connecting extended fixed inner sleeve.

[0047] Step B: welding the upper surface of the second partition plate to the first steel bar connecting sleeve, and welding the lower surface of the second partition plate 420 to the third steel bar connecting sleeve.

[0048] Step C, welding the supporting mechanism to the first partition plate and the second partition plate.

[0049] Step D: Connect the longitudinal reinforcement of the pier to the first partition plate through the second reinforcement connecting sleeve, and connect the anchor reinforcement of the partition plate to the second partition plate through the third reinforcement connecting sleeve.

[0050] Step E, connect the steel bar connection outer sleeve with the steel bar connection extended fixed inner sleeve on the first partition plate, and screw it to the uppermost thread of the steel bar connection extended fixed inner sleeve; connect the lower part of the plastic hinged longitudinal reinforcement with the second partition plate through the first steel bar connection sleeve.

[0051] Step F, connect the upper part of the plastic hinged longitudinal reinforcement with the movable inner sleeve of the steel bar connection, then screw the outer sleeve of the steel bar connection downward, and connect the extended fixed inner sleeve of the steel bar connection and the movable inner sleeve of the steel bar connection together through the outer sleeve of the steel bar connection.

[0052] Step G: Wrap the upper connection joint and the lower connection joint of the plastic hinged longitudinal reinforcement with masking tape, and pour high-ductility concrete.

[0053] Among them, the upper connection joint is a connection joint composed of the upper part of the plastic hinged longitudinal reinforcement, the extended fixed inner sleeve of the steel bar connection, the outer sleeve of the steel bar connection and the movable inner sleeve of the steel bar connection; the lower connection joint is a connection joint composed of the lower part of the plastic hinged longitudinal reinforcement and the first steel bar connection sleeve.

[0054] The above steps A to G are to detachably connect the bridge pier and the abutment through the first plastic hinge. The embodiment of the present application also includes a second plastic hinge to detachably connect the cap beam and the abutment. Please refer to steps A to G for details, which will not be repeated here.

[0055] In some embodiments, the installation method of the bridge toughness seismic resistance system with replaceable plastic hinge area at the column end may further include: Step H, when repairing the replaceable bridge toughness seismic resistance system in the plastic hinge area at the column end, remove the damaged outer layer of concrete, untie the masking tape, remove the waste plastic hinge longitudinal reinforcement, replace it with a new plastic hinge longitudinal reinforcement, and then use the masking tape to wrap the upper and lower connection joints of the new plastic hinge longitudinal reinforcement, and re-pour the concrete.

[0056] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A bridge toughness seismic resistance system with replaceable plastic hinge area at column end, comprising a cap beam, a pier and a cap, characterized in that: It also includes a first plastic hinge; the cap beam is arranged at the upper end of the pier, and the lower end of the pier is detachably connected to the cap through the first plastic hinge; The first plastic hinge comprises a first partition plate, a second partition plate, a plastic hinge longitudinal reinforcement and a supporting mechanism; the first partition plate is detachably connected to the pier, and the second partition plate is detachably connected to the cap; the plastic hinge longitudinal reinforcement is arranged between the first partition plate and the second partition plate, and both ends are detachably connected to the first partition plate and the second partition plate; the supporting mechanism is fixed between the first partition plate and the second partition plate, and the supporting mechanism is located in the inner area surrounded by the plastic hinge longitudinal reinforcement; High-ductility concrete is poured between the first partition plate and the second partition plate, and the plastic hinged longitudinal reinforcement and the supporting mechanism are arranged in the concrete.

2. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 1 is characterized in that: The first plastic hinge also includes a steel bar connection extended fixed inner sleeve, a steel bar connection outer sleeve and a steel bar connection movable inner sleeve; One end of the steel bar connection extended fixed inner sleeve is fixed to the lower side of the first partition plate, and the other end of the steel bar connection extended fixed inner sleeve is connected to the steel bar connection movable inner sleeve through the steel bar connection outer sleeve; the steel bar connection movable inner sleeve is provided with a groove with a circular cross-section, the depth direction of the groove is consistent with the axial direction of the steel bar connection movable inner sleeve, and the inner side wall of the groove is provided with an internal thread; The upper end of the plastic hinged longitudinal reinforcement is provided with an external thread, and the upper end of the plastic hinged longitudinal reinforcement is threadedly connected to the steel bar connecting movable inner sleeve.

3. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 2 is characterized in that: The first plastic hinge further includes a first steel bar connecting sleeve, which is fixed on the upper side of the second partition plate, and the lower end of the plastic hinge longitudinal reinforcement is connected to the first steel bar connecting sleeve.

4. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 3 is characterized in that: The first plastic hinge further includes a second steel bar connecting sleeve and a third steel bar connecting sleeve; the second steel bar connecting sleeve is fixed to the upper side of the first partition plate, and the third steel bar connecting sleeve is fixed to the lower side of the second partition plate; The pier is provided with pier longitudinal reinforcement, and the pier longitudinal reinforcement is connected to the second steel bar connecting sleeve; the cap is provided with partition plate anchor reinforcement, and the upper end of the partition plate anchor reinforcement is connected to the third steel bar connecting sleeve.

5. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 4 is characterized in that: There are multiple plastic hinge longitudinal bars, and the first plastic hinge further includes multiple first plastic hinge stirrups and multiple second plastic hinge stirrups, each first plastic hinge stirrup is wrapped around the outside of each plastic hinge longitudinal bar and connected to each plastic hinge longitudinal bar; In the length direction of the plastic hinged longitudinal reinforcement, the first plastic hinged stirrups and the second plastic hinged stirrups are divided into multiple layers, each layer includes a first plastic hinged stirrup and multiple second plastic hinged stirrups, and each first plastic hinged stirrup is evenly distributed on the plastic hinged longitudinal reinforcement; each plastic hinged longitudinal reinforcement forms a quadrilateral, and at the four corners of the quadrilateral, the second plastic hinged stirrups are connected to two plastic hinged longitudinal reinforcements, and the second plastic hinged stirrups and the first plastic hinged stirrups form a triangle.

6. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to any one of claims 1 to 5, characterized in that: The supporting mechanism is a plastic hinge steel frame, and the cross section of the plastic hinge steel frame is I-shaped.

7. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 6 is characterized in that: A plurality of protrusions are arranged on both sides of the plastic hinge steel frame.

8. The bridge toughness seismic resistance system with replaceable column end plastic hinge area according to any one of claims 1 to 5, characterized in that: A second plastic hinge is provided between the cap beam and the pier, and the structure of the second plastic hinge is the same as that of the first plastic hinge.

9. A method for installing a bridge toughness seismic system with replaceable column end plastic hinge area, characterized in that: Applied to the bridge toughness seismic resistance system with replaceable column end plastic hinge zone as claimed in claim 5, the method comprises: The upper surface of the first partition plate is welded to the second steel bar connecting sleeve, and the lower surface of the first partition plate is welded to the steel bar connecting extended fixed inner sleeve; Welding the upper surface of the second partition plate to the first steel bar connecting sleeve, and welding the lower surface of the second partition plate to the third steel bar connecting sleeve; welding the supporting mechanism to the first partition plate and the second partition plate; Connect the longitudinal reinforcement of the pier to the first partition plate through the second reinforcement connection sleeve, and connect the anchor reinforcement of the partition plate to the second partition plate through the third reinforcement connection sleeve; Connect the steel bar connection outer sleeve with the steel bar connection extension fixed inner sleeve on the first partition plate, and screw it to the uppermost thread of the steel bar connection extension fixed inner sleeve; connect the lower part of the plastic hinged longitudinal reinforcement with the second partition plate through the first steel bar connection sleeve; Connect the upper part of the plastic hinged longitudinal reinforcement with the movable inner sleeve of the steel bar connection, then screw the outer sleeve of the steel bar connection downward, and connect the extended fixed inner sleeve of the steel bar connection and the movable inner sleeve of the steel bar connection through the outer sleeve of the steel bar connection; The upper connection joint and the lower connection joint of the plastic hinged longitudinal reinforcement are wrapped with masking tape, and high-ductility concrete is poured; wherein, the upper connection joint is a connection joint composed of the upper part of the plastic hinged longitudinal reinforcement, the steel bar connection extended fixed inner sleeve, the steel bar connection outer sleeve and the steel bar connection movable inner sleeve, and the lower connection joint is a connection joint composed of the lower part of the plastic hinged longitudinal reinforcement and the first steel bar connection sleeve.

10. The installation method of the bridge toughness seismic resistance system with replaceable column end plastic hinge area according to claim 9 is characterized in that: The method further comprises: When repairing the replaceable bridge toughness seismic resistance system in the plastic hinge area at the column end, remove the damaged outer layer of concrete, untie the masking tape, take down the obsolete plastic hinge longitudinal reinforcement, replace it with a new one, wrap the upper and lower connection joints of the new plastic hinge longitudinal reinforcement with masking tape, and re-pour the concrete.

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