Novel assembly type bridge pier seismic system based on function separation and assembly method

Abstract

The application discloses a novel assembly type bridge pier anti-seismic system based on function separation and an assembly method, which comprises a bridge pier top section, a bridge pier bottom section, a protective cylinder, a bearing platform, prestressed reinforcement and a triple friction energy dissipation device; the bearing platform is arranged at the top of a pile foundation, the top of the bearing platform is provided with the bridge pier bottom section, the bridge pier bottom section is a square column, and a plastic hinge area is arranged around the middle and lower parts of the bridge pier bottom section; the outer side of the plastic hinge area is provided with the protective cylinder, and the top of the bridge pier bottom section is provided with the bridge pier top section; the prestressed reinforcement connects the bearing platform, the bridge pier bottom section and the bridge pier top section; and a plurality of triple friction energy dissipation devices are arranged between the bearing platform and the steel cylinder. The prestressed reinforcement provides a self-resetting function for the bridge pier system, controls the residual displacement of the bridge pier system after an earthquake, reduces the repair difficulty of the bridge pier after the earthquake, improves the repair speed, absorbs and dissipates seismic energy through the friction energy dissipation mechanism of the externally arranged triple friction energy dissipation device, and reduces the damage of the earthquake to the bridge pier.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge construction, and more particularly relates to a novel assembly type bridge pier seismic system based on function separation and an assembly method. BACKGROUND

[0002] In recent years, the rapid development of the infrastructure construction industry, high-rise buildings and bridge structures have emerged rapidly. The rapid development of modern society and the rapid advancement of urbanization have driven a large number of engineering project construction needs. At present, the construction technology of infrastructure projects is still mainly based on traditional construction technology, but the traditional construction technology has many defects. The on-site construction process is rough, the engineering quality is difficult to guarantee, the on-site personnel is complex, the production efficiency is low, there are many safety hazards, and it is not conducive to the green and healthy development of infrastructure construction.

[0003] Bridge engineering is the key and throat of line planning, and the rapid landing and green development of this engineering construction have important practical significance for improving the overall benefits of the project. In order to meet the long-term development of the bridge construction industry and create economic benefits throughout the life cycle, assembly type bridge technology has emerged. Assembly type technology is mainly divided into two categories. One is the equivalent cast-in-place system, mainly based on sleeve grouting connection, corrugated pipe grouting connection, preformed hole grouting connection, socket connection and cast-in-place wet joint connection technology, and the peak bearing capacity of the hysteresis curve, the total energy consumption area and the cast-in-place reinforced concrete pier are basically the same, but the post-earthquake residual displacement is large, which is not conducive to the rapid repair of the bridge after the earthquake. The other is a non-equivalent cast-in-place system, mainly using post-tensioned prestressed segmental assembly system technology, which has a weak hysteresis curve peak bearing capacity and energy consumption area compared to cast-in-place reinforced concrete piers, and there is no through longitudinal stress reinforcement at the joint, which is weak in stress, but the post-earthquake residual displacement is small, can be replaced and repaired quickly, and the plastic damage is smaller than that of cast-in-place reinforced concrete piers. SUMMARY

[0004] In view of the above defects or improvement needs of the prior art, the present application provides a novel assembly type bridge pier seismic system based on function separation and an assembly method. By arranging six pieces of purple copper friction plates at the three rotating nodes of the triple friction energy dissipation device, the energy dissipation capacity is stronger. Compared with brake pads and high-strength steel, the hysteresis curve of the purple copper friction plate is more full and stable, the stiffness change is smaller, the energy dissipation effect is more stable, and the thermal expansion coefficients of copper and steel are inconsistent. The heat generated during the friction process increases the thickness of the steel and copper contact surface, further extruding the steel and copper friction surface, and increasing the friction force. In addition, the pre-tightening force of the bolts at the three rotating nodes can be adjusted to change the friction coefficient between the friction plate and the steel connecting arm, and different friction effects can be obtained to provide multi-stage energy dissipation and seismic reserve for the bridge pier.

[0005] In order to achieve the above object, according to the first aspect of the present application, a new type of assembled bridge pier seismic system based on function separation is provided, comprising a bridge pier top segment, a bridge pier bottom segment, a protective cylinder, a bearing platform, prestressed reinforcement, and a triple friction energy dissipation device;

[0006] The bearing platform is arranged at the top of the pile foundation, the middle of the top of the bearing platform is provided with the bridge pier bottom segment, the bridge pier bottom segment is a square column, and a plastic hinge zone is arranged around the middle and lower part of the bridge pier bottom segment, the outer side of the plastic hinge zone is provided with the protective cylinder, and the top of the bridge pier bottom segment is provided with the bridge pier top segment.

[0007] The prestressed reinforcement connects the bearing platform, the bridge pier bottom segment and the bridge pier top segment through a prestressed duct.

[0008] The triple friction energy dissipation device comprises a first connecting plate and a second connecting plate, the top of the first connecting plate is fixedly provided with an outer connecting lug plate, the top of the outer connecting lug plate is provided with a first outer connecting arm and a second outer connecting arm on both sides, respectively, a red copper type friction plate is arranged between the outer connecting lug plate and the first outer connecting arm, a red copper type friction plate is arranged between the outer connecting lug plate and the second outer connecting arm, an inner connecting arm is arranged between the other end of the first outer connecting arm and the second outer connecting arm, a red copper type friction plate is arranged between the first outer connecting arm and the inner connecting arm, a red copper type friction plate is arranged between the second outer connecting arm and the inner connecting arm, the first inner connecting lug plate and the second inner connecting lug plate are fixedly arranged on the side of the second connecting plate, an inner connecting arm is arranged between the first inner connecting lug plate and the second inner connecting lug plate, a red copper type friction plate is arranged between the first inner connecting lug plate and the inner connecting arm, and a red copper type friction plate is arranged between the second inner connecting lug plate and the inner connecting arm.

[0009] Further, the top and the bottom of the protective cylinder are provided with grouting corrugated pipes, and the bridge pier bottom segment is provided with outer extending steel bars at the contact position with the protective cylinder.

[0010] Further, the bridge pier top segment, the bridge pier bottom segment and the bearing platform are provided with a through prestressed duct.

[0011] Further, the top of the bearing platform is provided with a grouting corrugated pipe, the bottom of the bridge pier bottom segment is provided with an outer extending steel bar, and the top of the bridge pier bottom segment is provided with a grouting corrugated pipe.

[0012] Further, the first outer connecting arm, the outer connecting lug plate, the second outer connecting arm and the red copper type friction plate are connected through bolts to form a first rotation joint.

[0013] Further, the first outer connecting arm, the second outer connecting arm, the inner connecting arm and the red copper type friction plate are connected through bolts to form a second rotation joint.

[0014] Further, the first inner connecting lug, the second inner connecting lug, the copper type friction plate and the inner connecting arm are connected by bolts to form a third rotation joint.

[0015] Further, the first connecting plate and the second connecting plate are provided with a plurality of screw holes.

[0016] Further, the triple friction energy dissipation device is fixedly connected by the first connecting plate and fixedly connected with the steel casing by the second connecting plate.

[0017] According to another aspect of the present application, a new type of assembly method of a functionally separated assembly type bridge pier seismic system is provided, comprising the following steps:

[0018] S100: according to the drawings of each component, the template is customized, when the top segment of the bridge pier is prefabricated, the prestressed steel bar hole and the bottom external reinforcement are reserved, when the bottom segment of the bridge pier is prefabricated, the specially customized template is used in the plastic hinge zone, the position of the reinforcement framework is corrected, the thickness of the concrete protection layer is ensured to be sufficient, the grouting bellows and the bottom external reinforcement are reserved, and when the bearing platform is prefabricated, the grouting bellows hole is reserved on the top of the bearing platform;

[0019] S200: the protection casing is manufactured by using the high ductility cement-based composite material, the grouting bellows is reserved on the top and the bottom of the protection casing, and each accessory of the triple friction energy dissipation device is prefabricated according to the design drawing;

[0020] S300: each component is transported to the construction site after being prefabricated, the pile foundation is driven, including drilling, hole cleaning, bottom cleaning and reinforcement cage hoisting, the pile foundation concrete is poured, and then the prefabricated bearing platform is installed on the top of the pile foundation;

[0021] S400: after the installation of the bearing platform is completed, the prestressed steel bar is anchored at the bottom of the bearing platform, the prestressed steel bar passes through the reserved hole of the bearing platform and extends to the outside of the bearing platform, the bridge pier bottom segment is hoisted, the prestressed steel bar passing through the bottom of the bearing platform passes through the reserved hole of the bridge pier bottom segment, at the same time, the external reinforcement reserved in the bridge pier bottom segment extends into the reserved grouting bellows on the top of the bearing platform, and high-strength grouting material is poured on the side, and the assembly of the bridge pier bottom segment and the bearing platform is completed;

[0022] S500: the bridge pier top segment is hoisted to the bridge pier bottom segment by using a crane, the prestressed steel bar extending out of the bridge pier bottom segment passes through the reserved hole of the bridge pier top segment, at the same time, the external reinforcement reserved in the bridge pier top segment extends into the reserved grouting bellows hole on the top of the bridge pier bottom segment, and high-strength grouting material is poured, after the assembly of the bridge pier top segment is completed, the prestressed steel bar is tensioned on the top of the bridge pier top segment and anchored on the top of the bridge pier;

[0023] S600: After all the segments of the pier are assembled, install the protective cylinder at the position of the plastic hinge zone of the bottom segment of the pier, extend the longitudinal reinforcement outside the protective cylinder installation area of the plastic hinge zone into the grouting bellows at the top and bottom of the protective cylinder, and introduce high-strength grouting material to complete the grouting assembly connection of the high-ductility protective cylinder.

[0024] S700: Install the triple friction energy dissipation device around the bottom segment of the pier and fix it to the pile cap through the first connecting plate and to the protective cylinder through the second connecting plate.

[0025] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0026] 1. The novel assembly type pier seismic system based on functional separation of the present application has stronger energy dissipation capacity by arranging six pieces of red copper type friction plates at the three rotating nodes of the triple friction energy dissipation device, the hysteresis curve of the red copper type friction plate is more full and stable compared with the brake pad and high-strength steel, the stiffness change is smaller, the energy dissipation effect is more stable, and the thermal expansion coefficients of copper and steel are inconsistent, the heat generated during friction increases the thickness of the contact surface of steel and copper, further extruding the steel-copper friction surface to increase the friction force; in addition, the friction coefficient between the friction plate and the steel connecting arm can be adjusted by adjusting the pre-tightening force of the bolts at the three rotating nodes to obtain different friction effects and provide multi-stage energy dissipation and seismic reduction reserves for the pier.

[0027] 2. The novel assembly type pier seismic system based on functional separation of the present application has strong adaptability and large rotating capacity of the rotating angle of the three rotating nodes of the triple friction energy dissipation device, the rotating angle of a single node is distributed to three rotating nodes by using the lever principle, the rotating direction of the single node is decoupled by the rotating setting of the three nodes, and the triple friction energy dissipation device installed outside the node can cope with the rotating angle and displacement under any condition.

[0028] 3. The novel assembly type pier seismic system based on functional separation of the present application has flexible installation position and low space occupancy rate of the triple friction energy dissipation device, the externally installed triple friction energy dissipation device is convenient for pre-seismic installation and post-seismic disassembly and replacement, the externally installed triple friction energy dissipation device not only can realize friction energy dissipation and seismic reduction, but also can improve the horizontal resistance and stiffness of the pier to ensure the stress stability of the pier under different static and dynamic loads, the protective cylinder is externally arranged at the plastic hinge zone of the bottom segment of the pier, the high-ductility cement-based composite material can improve the crack resistance of the bottom segment of the pier, reduce the cumulative plastic damage, improve the durability, and protect the plastic hinge zone of the bottom segment of the pier.

[0029] 4. The present invention provides a novel prefabricated bridge pier seismic resistance system based on functional separation. By connecting the abutment, the bottom segment of the pier, and the top segment of the pier with prestressed steel bars, the system provides a self-resetting function for the pier system, controls the residual displacement of the pier system after an earthquake, reduces the difficulty of repairing the pier after an earthquake, and improves the repair speed of the pier after an earthquake. It is used in conjunction with an external triple friction energy dissipation device and a protective cylinder to implement the advanced design concept of functional separation and tough seismic resistance of the pier system, and ensure the seismic safety of the pier system. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pier elevation of a novel prefabricated pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of a bridge pier plan, representing a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic elevation view of a steel casing of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0033] Figure 4 This is a schematic plan view of a steel casing of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0034] Figure 5 This is a front view of a triple friction energy dissipation device for a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0035] Figure 6 This is a side view of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0036] Figure 7 This is a top view of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0037] Figure 8 This is a rotational schematic diagram of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0038] Figure 9 This is a schematic diagram of the assembly method of a novel prefabricated bridge pier seismic-resistant system based on functional separation, according to an embodiment of the present invention.

[0039] In all the drawings, the same reference signs refer to the same technical features, specifically: 1 - top segment of the pier, 2 - bottom segment of the pier, 21 - plastic hinge zone, 3 - protection cylinder, 4 - pile cap, 5 - prestressed reinforcement, 6 - triple friction energy dissipation device, 601 - copper friction plate, 602 - inner connecting arm, 603 - first outer connecting arm, 604 - second outer connecting arm, 605 - first inner connecting lug, 606 - second inner connecting lug, 607 - outer connecting lug, 608 - first connecting plate, 609 - second connecting plate, 610 - threaded hole. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0042] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and should not be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0043] In this patent, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "comprise" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0044] Example 1

[0045] As Figures 1-4 shown, the embodiment of the present application provides a new type of assembled bridge pier seismic system based on function separation, comprising a bridge pier top segment 1, a bridge pier bottom segment 2, a protective cylinder 3, a pile cap 4, prestressed reinforcement 5, and a triple friction energy dissipation device 6, the pile cap 4 is arranged at the top of the pile foundation, and a through prestressed hole is arranged in the middle of the pile cap 4, a bridge pier bottom segment 2 is arranged in the middle of the top of the pile cap 4, and a through prestressed hole is arranged in the middle of the bridge pier bottom segment 2, the bridge pier bottom segment 2 is a square column, and a plastic hinge zone 21 is arranged around the middle and lower part of the bridge pier bottom segment 2, the protective cylinder 3 is arranged outside the plastic hinge zone 21, and the height of the protective cylinder 3 is consistent with the height of the plastic hinge zone 21, the protective cylinder 3 is arranged outside the plastic hinge zone 21 of the bridge pier bottom segment 2, and the protective cylinder 3 is made of high ductility cement-based composite material, which can improve the crack resistance of the bridge pier bottom, reduce the cumulative plastic damage, improve the durability, and protect the plastic hinge zone 21 of the bridge pier bottom segment 2.

[0046] Further, the top and bottom of the protective cylinder 3 are provided with grouting corrugated pipes, and the contact positions of the bridge pier bottom segment 2 and the protective cylinder 3 are reserved with external reinforcement, the grouting corrugated pipes can be filled with grouting material, and the grouting material can tightly fill the gap between the corrugated pipe and the bridge pier after solidification, forming a continuous and solid whole structure, the filling of the grouting material improves the connection strength between the bridge pier and the protective cylinder, so that the two can work better together to bear the load from the bridge surface, and the reserved external reinforcement can be embedded in the grouting material, further enhancing the connection between the bridge pier and the protective cylinder, effectively improving the overall stiffness and stability of the structure.

[0047] Further, the bridge pier bottom segment 2 is provided with a bridge pier top segment 1 at the top, and the facade of the bridge pier top segment 1 is in the shape of a vase, and a through prestressed hole is arranged in the middle.

[0048] Further, the prestressed reinforcement 5 connects the pile cap 4, the bridge pier bottom segment 2 and the bridge pier top segment 1 through the prestressed hole; the prestressed reinforcement 5 penetrates through the whole bridge pier system (from the pile cap to the top segment), ensuring the close connection between the parts, greatly improving the integrity and stiffness of the structure, and the use of the prestressed reinforcement 5 enhances the toughness and elastic recovery capacity of the structure, which can better absorb and disperse energy in the event of an earthquake and provide better seismic protection.

[0049] Furthermore, the top of the pier cap 4 is equipped with a grouting corrugated pipe, and the bottom of the pier bottom segment 2 is equipped with an outward-extending steel bar. When the bottom segment 2 of the pier is installed on the top of the pier cap 4, the outward-extending steel bar of the bottom segment 2 of the pier extends into the grouting corrugated pipe at the top of the pier cap 4, and then high-strength grout is injected to complete the assembly of the bottom segment 2 of the pier and the pier cap 4. The outward-extending steel bar can penetrate into the interior of the pier cap, and after high-strength grout is injected between the steel bar and the grouting corrugated pipe, a mechanical locking system can be formed, which greatly enhances the connection strength between the pier and the pier cap, thereby improving the integrity and seismic performance of the entire structure and helping to transfer the load of the superstructure to the foundation more effectively. When the prefabricated components are assembled on site, the pre-set grouting corrugated pipe and outward-extending steel bar can make the installation process more convenient and faster, reduce the amount of wet work on site, and improve construction efficiency.

[0050] Furthermore, the top segment 1 of the pier is provided with an outward-extending reinforcing bar at its bottom, and the bottom segment 2 of the pier is provided with a grouting corrugated pipe at its top. When the top segment 1 of the pier is installed on top of the bottom segment 2 of the pier, the outward-extending bottom reinforcing bar of the top segment 1 extends into the grouting corrugated pipe at the top of the bottom segment 2 of the pier, and high-strength grout is injected to complete the assembly of the bottom segment 2 of the pier. The combination of the outward-extending reinforcing bar and the grouting corrugated pipe can form a strong mechanical lock, ensuring a high-strength connection between the two segments. The high-strength grout filling between the reinforcing bar and the corrugated pipe provides additional bonding force, enhances the overall stability and load-bearing capacity of the structure, helps to distribute the load more evenly, reduces stress concentration, improves seismic performance, and enables rapid and accurate segment splicing on site, reducing the need for on-site welding or other complex procedures, improving construction efficiency. The presence of the grouting corrugated pipe makes it easier to align the reinforcing bars and reduces installation time.

[0051] like Figures 5-7 As shown, the triple friction energy dissipation device 6 includes a first connecting plate 608. The first connecting plate 608 has multiple screw holes 610 around its perimeter. An outer connecting ear plate 607 is fixedly installed at the top center of the first connecting plate 608. A first outer connecting arm 603 and a second outer connecting arm 604 are respectively provided on the top two sides of the outer connecting ear plate 607. A copper friction plate 601 is provided between the outer connecting ear plate 607 and the first outer connecting arm 603. A copper friction plate 601 is also provided between the outer connecting ear plate 607 and the second outer connecting arm 604. The first outer connecting arm 603, the outer connecting ear plate 607, the second outer connecting arm 604, and the copper friction plate 601 are rotatably connected by bolts to form a first rotation node. By adjusting the bolt preload, the coefficient of friction between the copper friction plate 601 and the first outer connecting arm 603 and the second outer connecting arm 604 can be increased.

[0052] The other end of the first outer connecting arm 603 and the second outer connecting arm 604 is provided with an inner connecting arm 602, the first outer connecting arm 603 and the inner connecting arm 602 are provided with a red copper type friction plate 601, the second outer connecting arm 604 and the inner connecting arm 602 are provided with a red copper type friction plate 601, and the first outer connecting arm 603, the second outer connecting arm 604, the inner connecting arm 602 and the red copper type friction plate 601 are connected by bolts to form a second rotation node, and the friction coefficient of the red copper type friction plate 601 and the first outer connecting arm 603 and the second outer connecting arm 604 is improved by adjusting the bolt pre-tightening force.

[0053] The triple friction energy dissipation device 6 further comprises a second connecting plate 609, the second connecting plate 609 is provided with a plurality of screw holes 610 around, the first inner connecting ear plate 605 and the second inner connecting ear plate 606 are fixedly installed on the side surface of the second connecting plate 609, the first inner connecting ear plate 605 and the second inner connecting ear plate 606 are provided with an inner connecting arm 602, the first inner connecting ear plate 605 and the inner connecting arm 602 are provided with a red copper type friction plate 601, the second inner connecting ear plate 606 and the inner connecting arm 602 are provided with a red copper type friction plate 601, and the first inner connecting ear plate 605, the second inner connecting ear plate 606, the red copper type friction plate 601 and the inner connecting arm 602 are connected by bolts to form a third rotation node, and the friction coefficient of the red copper type friction plate 601 and the inner connecting arm 602 is improved by adjusting the bolt pre-tightening force.

[0054] Further, the triple friction energy dissipation device 6 is fixedly connected with the bearing platform 4 through the first connecting plate 608 and is fixedly connected with the steel casing 3 through the second connecting plate 609. According to the load size expected to be borne by the bridge superstructure, a proper number of triple friction energy dissipation devices 6 can be flexibly selected and installed to ensure the structural safety and the optimal energy dissipation effect.

[0055] The triple friction energy dissipation device 6 adopts the lever principle, divides the rotation angle of the bridge pier swing to the triple friction energy dissipation device 6 into three rotation nodes, decouples the single-node rotation direction movement, so that the triple friction energy dissipation device 6 can greatly adapt to any angle change between the bridge pier bottom segment 2 and the bearing platform 4. Moreover, the triple friction energy dissipation device can be disassembled and replaced in time after damage under the action of an earthquake, so that the bridge pier can quickly restore the use function. Even if the bridge pier is in an elastic state under the action of small earthquakes or wind loads, the included angle between the bridge pier bottom segment 2 and the bearing platform 4 does not change, and the triple friction energy dissipation device 6 can provide reinforcement to the bridge pier at this time, thereby enhancing the horizontal resistance and stiffness of the bridge pier and helping the structure to maintain a stable stress state.

[0056] The working principle of the novel assembly type bridge pier anti-seismic system based on function separation of the application is as follows: when resisting small earthquakes, the bridge pier system has reliable grouting corrugated pipe connection, prestress series application of pre-pressure, protection cylinder 3 protecting the plastic hinge zone 21 of the bottom section 2 of the bridge pier, and the external triple friction energy dissipation device 6, so that the bridge pier system remains in an elastic state and maintains a stable stress state; as the intensity of the earthquake increases, the protection cylinder 3 cracks, the bottom joint of the bottom section 2 of the bridge pier opens, the plastic hinge zone 21 does not appear obvious damage, the external triple friction energy dissipation device 6 appears small amplitude rotation, and the prestressed reinforcement 5 appears deformation, starting to play a self-resetting role; when resisting large earthquakes, the protection cylinder 3 appears plastic damage area expansion, the bottom joint of the bottom section 2 of the bridge pier increases in opening angle, the plastic hinge zone 21 appears obvious plastic damage, the external triple friction energy dissipation device 6 appears large amplitude rotation, plays a higher level of self-energy dissipation and shock absorption, the prestressed reinforcement 5 plays a higher level of self-resetting, and the bridge pier as a whole appears obvious large amplitude reciprocating swing; at this time, if the intensity of the earthquake increases again, the protection cylinder 3 appears obvious plastic damage, the bottom joint of the bottom section 2 of the bridge pier appears opening and closing alternately, the plastic hinge zone 21 appears serious damage, the shock absorption of the external triple friction energy dissipation device 6 and the self-resetting function of the prestressed reinforcement 5 are both played to the extreme, and the swing amplitude of the bridge pier as a whole increases again, but no collapse phenomenon appears; after the earthquake, the damaged bottom section 2 of the bridge pier can be replaced by removing the prestressed reinforcement 5, the damaged protection cylinder 5 is also replaced immediately, and the external triple friction energy dissipation device 6 can replace the purple copper friction plate 601 or multiple component members according to the damage state.

[0057] Example 2

[0058] In combination Figures 1-7 As Figure 8 shown, the application provides an assembly method of a novel assembly type bridge pier anti-seismic system based on function separation, and the specific steps are as follows:

[0059] S100: according to the drawings of each component, the template is customized, the prestressed reinforcement hole and the bottom external reinforcement are reserved when the top section 1 of the bridge pier is prefabricated, the plastic hinge zone 21 adopts a specially customized template when the bottom section 2 of the bridge pier is prefabricated, the position of the reinforcement framework is corrected to ensure that the concrete has sufficient protection layer thickness, the grouting corrugated pipe and the bottom external reinforcement are reserved, and the grouting corrugated pipe hole is reserved on the top of the pile cap 4 when the pile cap 4 is prefabricated;

[0060] S200: the protection cylinder 3 is manufactured by using a high ductility cement-based composite material, and the grouting corrugated pipe is reserved at the top and the bottom of the protection cylinder 3, and each accessory of the triple friction energy dissipation device 6 is prefabricated according to the design drawing;

[0061] S300: Transporting the prefabricated components to the construction site, carrying out pile foundation piling construction, including drilling, hole cleaning, bottom cleaning and reinforcement cage hoisting, pouring pile foundation concrete, and then installing the prefabricated pile cap 4 on the top of the pile foundation;

[0062] S400: After the pile cap 4 is installed, anchoring the prestressed steel bars 5 at the bottom of the pile cap 4, the prestressed steel bars 5 pass through the reserved hole of the pile cap 4 and extend to the outside of the pile cap 4, hoisting the bottom segment 2 of the pier, the prestressed steel bars 5 passing through the bottom of the pile cap 4 pass through the reserved hole of the bottom segment 2 of the pier, at the same time, the reserved external prestressed steel bars of the bottom segment 2 of the pier extend into the reserved grouting corrugated pipe at the top of the pile cap 4 and are poured with high-strength grouting material on the side, completing the assembly of the bottom segment 2 of the pier and the pile cap 4;

[0063] S500: Hoisting the top segment 1 of the pier to the bottom segment 2 of the pier by using a crane, passing the prestressed steel bars 5 extending outside the bottom segment 2 of the pier through the reserved hole of the top segment 1 of the pier, at the same time, the reserved external prestressed steel bars of the top segment 1 of the pier extend into the reserved grouting corrugated pipe hole at the top of the bottom segment 2 of the pier and are poured with high-strength grouting material, after the top segment 1 of the pier is assembled, then tensioning the prestressed steel bars 5 at the top of the top segment 1 of the pier and anchoring at the top of the pier;

[0064] S600: After all the segments of the pier are assembled, installing the protective cylinder 3 at the position of the plastic hinge zone 21 of the bottom segment 2 of the pier, extending the longitudinal steel bars of the reserved installation area of the protective cylinder 3 of the plastic hinge zone 21 into the grouting corrugated pipes at the top and bottom of the protective cylinder 3 and introducing high-strength grouting material, completing the grouting assembly connection of the high-ductility protective cylinder 3;

[0065] S700: Installing the triple friction energy dissipation device around the bottom segment 2 of the pier and fixedly connecting it with the pile cap through the first connecting plate 608 and fixedly connecting it with the protective cylinder 3 through the second connecting plate 609.

[0066] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A functionally separated assembled bridge pier seismic system, characterized in that, The application relates to a bridge pier structure, which comprises a bridge pier top section (1), a bridge pier bottom section (2), a protective cylinder (3), a bearing platform (4), prestressed steel bars (5) and a triple friction energy dissipation device (6). The bearing platform (4) is arranged at the top of a pile foundation, a bridge pier bottom section (2) is arranged at the middle of the top of the bearing platform (4), the bridge pier bottom section (2) is a square column, plastic hinge zones (21) are arranged around the middle and lower regions of the bridge pier bottom section (2), the protective cylinder (3) is arranged outside the plastic hinge zones (21), and the bridge pier top section (1) is arranged at the top of the bridge pier bottom section (2). The prestressed steel bars (5) are connected with the bearing platform (4), the bridge pier bottom section (2) and the bridge pier top section (1) through prestressed ducts. The triple friction energy dissipation device (6) comprises a first connecting plate (608) and a second connecting plate (609), the top middle of the first connecting plate (608) is fixedly provided with an outer connecting lug plate (607), the top sides of the outer connecting lug plate (607) are respectively provided with a first outer connecting arm (603) and a second outer connecting arm (604), the outer connecting lug plate (607) and the first outer connecting arm (603) are provided with a red copper type friction plate (601), the outer connecting lug plate (607) and the second outer connecting arm (604) are provided with a red copper type friction plate (601), the other ends of the first outer connecting arm (603) and the second outer connecting arm (604) are provided with an inner connecting arm (602), the first outer connecting arm (603) and the inner connecting arm (602) are provided with a red copper type friction plate (601), the second outer connecting arm (604) and the inner connecting arm (602) are provided with a red copper type friction plate (601), the first inner connecting lug plate (605) and the second inner connecting lug plate (606) are fixedly arranged on the side of the second connecting plate (609), the first inner connecting lug plate (605) and the second inner connecting lug plate (606) are provided with an inner connecting arm (602), the first inner connecting lug plate (605) and the inner connecting arm (602) are provided with a red copper type friction plate (601), and the second inner connecting lug plate (606) and the inner connecting arm (602) are provided with a red copper type friction plate (601). The first outer connecting arm (603), the outer connecting lug plate (607), the second outer connecting arm (604) and the red copper type friction plate (601) are rotationally connected through bolts to form a first rotation joint, the first outer connecting arm (603), the second outer connecting arm (604), the inner connecting arm (602) and the red copper type friction plate (601) are rotationally connected through bolts to form a second rotation joint, and the first inner connecting lug plate (605), the second inner connecting lug plate (606), the red copper type friction plate (601) and the inner connecting arm (602) are rotationally connected through bolts to form a third rotation joint.

2. The functionally separated assembly type pier seismic system according to claim 1, characterized in that, The top and the bottom of the protective cylinder (3) are provided with grouting corrugated pipes, and the bridge pier bottom section (2) and the protective cylinder (3) are provided with outer extending steel bars at the contact positions.

3. The functionally separated assembly type pier seismic system according to claim 1, characterized in that, The bridge pier top section (1), the bridge pier bottom section (2) and the bearing platform (4) are provided with through prestressed ducts.

4. The functionally separated assembly type pier seismic system according to claim 3, characterized in that, The top of the bearing platform (4) is provided with a grouting corrugated pipe, the bottom section (2) of the pier is provided with an external reinforcement at the bottom and a grouting corrugated pipe at the top, and the top section (1) of the pier is provided with an external reinforcement at the bottom.

5. The functionally separated assembly type pier seismic system according to any one of claims 1-4, characterized in that, The first connecting plate (608) and the second connecting plate (609) are provided with a plurality of screw holes (610) around.

6. The functionally separated assembly type pier seismic system according to any one of claims 1-4, characterized in that, The triple friction energy dissipation device (6) is fixedly connected with the bearing platform (4) through the first connecting plate (608) and fixedly connected with the steel casing (3) through the second connecting plate (609).

7. The assembly method of a functionally separated fabricated bridge pier seismic system according to any one of claims 1-6, characterized in that, The method comprises the following steps: S100: According to the drawings of each component, customize the template, when prefabricating the top section (1) of the pier, reserve the prestressed steel bar hole and the bottom external reinforcement, when prefabricating the bottom section (2) of the pier, the plastic hinge area (21) adopts a specially customized template, corrects the position of the reinforcement framework, ensures the sufficient thickness of the concrete protection layer, reserves the grouting corrugated pipe and the bottom external reinforcement, and when prefabricating the bearing platform (4), reserves the grouting corrugated pipe hole at the top of the bearing platform (4); S200: The protective cylinder (3) is made of high ductility cement-based composite material, and the grouting corrugated pipes are reserved at the top and the bottom of the protective cylinder (3), and the accessories of the triple friction energy dissipation device (6) are prefabricated according to the design drawing; S300: Transport the prefabricated components to the construction site, carry out pile foundation piling construction, including drilling, hole cleaning, bottom cleaning and reinforcement cage hoisting, pour pile foundation concrete, then install the prefabricated bearing platform (4) on the top of the pile foundation; S400: After the installation of the bearing platform (4) is completed, anchor the prestressed steel bar (5) at the bottom of the bearing platform (4), the prestressed steel bar (5) passes through the reserved hole of the bearing platform (4) and extends to the outside of the bearing platform (4), hoist the bottom section (2) of the pier, the prestressed steel bar (5) passing through the bottom of the bearing platform (4) passes through the reserved hole of the bottom section (2) of the pier, at the same time, the external reinforcement reserved in the bottom section (2) of the pier extends into the reserved grouting corrugated pipe at the top of the bearing platform (4) and is poured into high-strength grouting material on the side, the assembly of the bottom section (2) of the pier and the bearing platform (4) is completed; S500: Use the crane to hoist the top section (1) of the pier to the bottom section (2) of the pier, pass the prestressed steel bar (5) extending out of the bottom section (2) of the pier through the reserved hole of the top section (1) of the pier, at the same time, the external reinforcement reserved in the top section (1) of the pier extends into the reserved grouting corrugated pipe hole of the top section (2) of the pier and is poured into high-strength grouting material, after the assembly of the top section (1) of the pier is completed, then tension the prestressed steel bar (5) at the top of the top section (1) of the pier and anchor it at the top of the pier; S600: After the assembly of all sections of the pier is completed, install the protective cylinder (3) at the position of the plastic hinge area (21) of the bottom section (2) of the pier, extend the external longitudinal reinforcement of the plastic hinge area (21) into the grouting corrugated pipes at the top and the bottom of the protective cylinder (3) and introduce high-strength grouting material, complete the grouting assembly connection of the high-ductility protective cylinder (3); S700: Install the triple friction energy dissipation device (6) around the bottom section (2) of the bridge pier, and fix it with the bearing platform through the first connecting plate (608) and with the protection cylinder (3) through the second connecting plate (609).

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