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

Abstract

The invention discloses a novel assembly type pier anti-seismic system based on function separation and an assembly method.The novel assembly type pier anti-seismic system comprises a pier top section, a pier bottom section, a protection barrel, a bearing platform, prestressed steel bars and a triple friction energy dissipation device, the bearing platform is arranged at the top of a pile foundation, the pier bottom section is arranged at the top of the bearing platform, the pier bottom section is a square column, and the protection barrel is connected with the protection barrel; a plastic hinge area is arranged on the periphery of the lower middle area, a protective barrel is arranged on the outer side of the plastic hinge area, and a pier top section is arranged on the top of the pier bottom section. The bearing platform, the pier bottom section and the pier top section are connected through the prestressed steel bars. And a plurality of triple friction energy dissipation devices are arranged between the bearing platform and the steel casing. The self-resetting function is provided for the pier system through the prestressed steel bars, the post-earthquake residual displacement of the pier system is controlled, the post-earthquake repairing difficulty of the pier is reduced, the repairing speed is increased, earthquake energy is absorbed and dissipated through a friction energy dissipation mechanism of the externally-arranged triple friction energy dissipation device, and damage of the earthquake to the pier is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and more specifically, relates to a novel assembled pier seismic resistance system based on functional separation and an assembly method. Background Art

[0002] In recent years, the infrastructure construction industry has developed rapidly, and high-rise buildings and bridge structures have emerged rapidly. The rapid development of modern society and the rapid advancement of urbanization have led to 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 traditional construction technology has many defects. The on-site construction process is rough, the quality of the project is difficult to guarantee, the on-site personnel are complex, the production efficiency is low, and there are many safety hazards, which is not conducive to the green and healthy development of infrastructure construction.

[0003] As the key and throat of line planning, the rapid implementation and green development of bridge construction have important practical significance for improving the overall benefits of the project. In order to meet the long-term development of bridge construction and create economic benefits throughout the life cycle, prefabricated bridge technology came into being. Prefabricated technology is mainly divided into two categories. One is the equivalent cast-in-place system, which mainly uses sleeve grouting connection, corrugated pipe grouting connection, grouting connection with reserved slots, socket connection and cast-in-place wet joint connection. Its hysteresis curve peak bearing capacity and total energy consumption area are basically the same as those of cast-in-place reinforced concrete piers, but the residual displacement after the earthquake is large, which is not conducive to the rapid repair of bridges after the earthquake; the other is the non-equivalent cast-in-place system, which mainly uses the post-tensioned prestressed segment assembly system technology. Its hysteresis curve peak bearing capacity and energy consumption area are weaker than those of cast-in-place reinforced concrete piers, and there is no full-length longitudinal force-bearing steel bar passing through the joints, so the force is weak, but its residual displacement after the earthquake is small, it can be disassembled and replaced, and repaired quickly, and the plastic damage is smaller than that of cast-in-place reinforced concrete piers. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a novel assembled bridge pier seismic resistance system and assembly method based on functional separation, by arranging six copper friction plates at the three rotation nodes of the triple friction energy dissipation device, the energy dissipation capacity is stronger, and the hysteresis curve of the copper friction plate is fuller and smoother than that of brake pads 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 the friction process increases the thickness of the contact surface between steel and copper, further squeezes the steel-copper friction surface, and increases the friction force; in addition, the pre-tightening force of the bolts at the three rotation nodes can be adjusted to change the friction coefficient between the friction plate and the steel connecting arm, so as to obtain different friction effects and provide multi-level energy dissipation and shock absorption reserves for the bridge piers.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present invention, a novel assembled bridge pier seismic resistance system based on functional separation is provided, comprising a bridge pier top segment, a bridge pier bottom segment, a protective cylinder, a cap, prestressed steel bars, and a triple friction energy dissipation device;

[0006] The cap is arranged on the top of the pile foundation, a pier bottom segment is arranged in the middle of the top of the cap, the pier bottom segment is a square column, and a plastic hinge area is arranged around the middle and lower area, a protective cylinder is arranged outside the plastic hinge area, and a pier top segment is arranged on the top of the pier bottom segment;

[0007] The prestressed steel bars connect the abutment, the bottom segment of the pier and the top segment of the pier through the prestressed duct;

[0008] The triple friction energy dissipation device includes a first connecting plate and a second connecting plate, an external connecting ear plate is fixedly installed in the middle of the top of the first connecting plate, a first external connecting arm and a second external connecting arm are respectively provided on both sides of the top of the external connecting ear plate, a copper-type friction plate is provided between the external connecting ear plate and the first external connecting arm, a copper-type friction plate is provided between the external connecting ear plate and the second external connecting arm, an inner connecting arm is provided between the other ends of the first external connecting arm and the second external connecting arm, a copper-type friction plate is provided between the first external connecting arm and the inner connecting arm, a copper-type friction plate is provided between the second external connecting arm and the inner connecting arm, a first inner connecting ear plate and a second inner connecting ear plate are fixedly installed on the side of the second connecting plate, an inner connecting arm is provided between the first inner connecting ear plate and the second inner connecting ear plate, a copper-type friction plate is provided between the first inner connecting ear plate and the inner connecting arm, and a copper-type friction plate is provided between the second inner connecting ear plate and the inner connecting arm.

[0009] Furthermore, the top and bottom of the protective tube are provided with grouting corrugated pipes, and the contact position between the bottom segment of the pier and the protective tube is provided with extended steel bars.

[0010] Furthermore, a through prestressed channel is provided between the top segment of the pier, the bottom segment of the pier, and the abutment.

[0011] Furthermore, a grouting corrugated pipe is provided at the top of the foundation, an outrigger steel bar is provided at the bottom of the bottom segment of the pier, a grouting corrugated pipe is provided at the top, and an outrigger steel bar is provided at the bottom of the top segment of the pier.

[0012] Furthermore, the first outer connecting arm, the outer connecting ear plate, the second outer connecting arm and the copper-type friction plate are rotationally connected by bolts to form a first rotation node.

[0013] Furthermore, the first outer connecting arm, the second outer connecting arm, the inner connecting arm and the copper-type friction plate are rotationally connected by bolts to form a second rotation node.

[0014] Furthermore, the first inner connecting ear plate, the second inner connecting ear plate, the copper-type friction plate and the inner connecting arm are rotationally connected by bolts to form a third rotation node.

[0015] Furthermore, a plurality of screw holes are arranged around the first connecting plate and the second connecting plate.

[0016] Furthermore, the triple friction energy dissipation device is fixedly connected to the base via a first connecting plate, and is fixedly connected to the steel casing via a second connecting plate.

[0017] According to another aspect of the present invention, a method for assembling a novel assembled bridge pier seismic resistant system based on functional separation is provided, comprising the following steps:

[0018] S100: Customize the template according to the drawings of each component. When prefabricating the top segment of the pier, reserve the prestressed steel bar channel and the bottom protruding steel bar. When prefabricating the bottom segment of the pier, use a specially customized template in the plastic hinge area to correct the position of the steel bar skeleton to ensure sufficient protective layer thickness of the concrete, reserve the grouting corrugated pipe and the bottom protruding steel bar. When prefabricating the cap, reserve the grouting corrugated pipe hole at the top of the cap.

[0019] S200: The protective tube is made of high-ductility cement-based composite materials, and grouting bellows are reserved at the top and bottom of the protective tube, and various accessories of the triple friction energy dissipation device are prefabricated according to the design drawings;

[0020] S300: transporting the prefabricated components to the construction site, carrying out pile foundation piling construction, including drilling, hole cleaning, bottom cleaning and steel cage hoisting, pouring pile foundation concrete, and then installing the prefabricated cap on the top of the pile foundation;

[0021] S400: After the installation of the cap is completed, anchor the prestressed steel bars at the bottom of the cap, pass through the reserved channel of the cap, and extend to the outside of the cap. The bottom segment of the pier is hoisted, and the prestressed steel bars passing through the bottom of the cap pass through the reserved channel of the bottom segment of the pier. At the same time, the outward extension steel bars reserved for the bottom segment of the pier extend along the reserved grouting corrugated pipe at the top of the cap, and high-strength grouting material is poured on the side to complete the assembly of the bottom segment of the pier and the cap;

[0022] S500: Use a crane to hoist the top segment of the pier onto the bottom segment of the pier, pass the protruding prestressed steel bars of the bottom segment of the pier through the reserved channel of the top segment of the pier, and at the same time, extend the protruding bottom steel bars reserved in the top segment of the pier into the reserved grouting corrugated pipe channel at the top of the bottom segment of the pier, and pour high-strength grouting material into it. After the assembly of the top segment of the pier is completed, the prestressed steel bars are tensioned at the top of the top segment of the pier, and anchored to the top of the pier;

[0023] S600: After all the segments of the pier are assembled, a protective tube is installed at the location of the plastic hinge area of ​​the bottom segment of the pier, and the longitudinal steel bars extending out of the protective tube installation area reserved in the plastic hinge area are extended into the grouting bellows at the top and bottom of the protective tube, and high-strength grouting material is introduced to complete the grouting assembly connection of the high-ductility protective tube;

[0024] S700: The triple friction energy dissipation device is installed around the bottom segment of the pier, and is fixedly connected to the pedestal through a first connecting plate, and is fixedly connected to the protective tube through a second connecting plate.

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

[0026] 1. A novel assembled bridge pier seismic resistance system based on functional separation of the present invention has stronger energy dissipation capacity by arranging six copper friction plates at three rotation nodes of the triple friction energy dissipation device. Compared with brake pads and high-strength steel, the hysteresis curve of the copper friction plate is fuller and smoother, the stiffness changes less, and the energy dissipation effect is more stable. In addition, the thermal expansion coefficients of copper and steel are inconsistent. The heat generated during the friction process increases the thickness of the contact surface between steel and copper, further squeezes the steel-copper friction surface, and increases the friction force. In addition, by adjusting the pre-tightening force of the bolts at the three rotation nodes, the friction coefficient between the friction plate and the steel connecting arm can be changed to obtain different friction effects, thereby providing multi-level energy dissipation and shock absorption reserves for the bridge piers.

[0027] 2. The present invention provides a novel assembled pier seismic resistance system based on functional separation. The rotation angles of the three rotation nodes of the triple friction energy dissipation device are highly adaptable and have large rotation capacity. The lever principle is used to distribute the rotation angle of a single node to the three rotation nodes. The rotation setting of the three nodes decouples the movement of the rotation direction of the single node, so that the triple friction energy dissipation device installed outside the node can cope with the rotation angle and displacement under any circumstances.

[0028] 3. The present invention provides a novel seismic-resistant system for assembled piers based on functional separation. The installation position of the triple friction energy dissipation device is flexible and the space occupancy rate is low. The externally mounted triple friction energy dissipation device is convenient for installation before an earthquake and disassembly and replacement after an earthquake. The external triple friction energy dissipation device can not only realize friction energy dissipation and shock absorption, but also improve the horizontal resistance and stiffness of the piers, and ensure the stress stability of the piers under different static loads and dynamic loads. A protective tube is arranged on the outside of the plastic hinge area of ​​the bottom segment of the pier, and a high-ductility cement-based composite material is used to improve the crack resistance of the bottom segment of the pier, reduce the accumulated plastic damage, improve the durability, and protect the plastic hinge area of ​​the bottom segment of the pier.

[0029] 4. The novel prefabricated pier seismic resistance system based on functional separation of the present invention connects the abutment, the bottom segment of the pier and the top segment of the pier through prestressed steel bars, 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 piers after an earthquake, increases the speed of repairing the piers after an earthquake, and is used in conjunction with an external triple friction energy dissipation device and a protective tube to implement the advanced design concept of functional separation and toughness seismic resistance of the pier system, thereby ensuring the seismic safety of the pier system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 It is a schematic diagram of a pier plane of a novel assembled pier seismic resistant system based on functional separation according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic elevation diagram of a steel casing of a novel assembled pier seismic resistant system based on functional separation according to an embodiment of the present invention;

[0033] Figure 4 It is a schematic plan view of a steel casing of a novel assembled bridge pier seismic resistant system based on functional separation according to an embodiment of the present invention;

[0034] Figure 5 It is a front view of a triple friction energy dissipation device of a novel assembled bridge pier seismic system based on functional separation according to an embodiment of the present invention;

[0035] Figure 6 It is a side view of a novel assembled bridge pier seismic resistance system based on functional separation according to an embodiment of the present invention;

[0036] Figure 7 A top view of a novel assembled bridge pier seismic resistance system based on functional separation according to an embodiment of the present invention;

[0037] Figure 8 It is a rotation schematic diagram of a novel assembled bridge pier seismic resistance system based on functional separation according to an embodiment of the present invention;

[0038] Fig. 9 The present invention is a flowchart of an assembly method of a novel assembled pier seismic-resistant system based on functional separation according to an embodiment of the present invention.

[0039] In all the drawings, the same figure marks represent the same technical features, specifically: 1-top segment of the pier, 2-bottom segment of the pier, 21-plastic hinge area, 3-protective cylinder, 4-cap pedestal, 5-prestressed steel bar, 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 ear plate, 606-second inner connecting ear plate, 607-external connecting ear plate, 608-first connecting plate, 609-second connecting plate, 610-screw hole. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention 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 invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0044] Example 1

[0045] like Figure 1-4 As shown, an embodiment of the present invention provides a novel assembled pier seismic resistant system based on functional separation, including a pier top segment 1, a pier bottom segment 2, a protective tube 3, a cap 4, a prestressed steel bar 5, and a triple friction energy dissipation device 6. The cap 4 is arranged at the top of the pile foundation, and a through prestressed channel is arranged in the middle of the cap 4. A pier bottom segment 2 is arranged in the middle of the top of the cap 4, and a through prestressed channel is arranged in the middle. The pier bottom segment 2 is a square column, and a plastic hinge area 21 is arranged around the middle and lower area. A protective tube 3 is arranged outside the plastic hinge area 21, and the height of the protective tube 3 is consistent with the height of the plastic hinge area 21. The protective tube 3 is arranged outside the plastic hinge area 21 of the pier bottom segment 2, which adopts a high-ductility cement-based composite material, which can improve the crack resistance of the pier bottom, reduce the accumulated plastic damage, improve the durability, and protect the plastic hinge area 21 of the pier bottom segment 2.

[0046] Furthermore, grouting bellows are provided at the top and bottom of the protective tube 3, and protruding steel bars are reserved at the contact position between the bottom segment 2 of the pier and the protective tube 3. Grouting material can be injected into the grouting bellows. After curing, the grouting material can tightly fill the gap between the bellows and the pier to form a continuous and solid overall structure. The filling of the grouting material improves the connection strength between the pier and the protective tube, so that the two can work better together and jointly bear the load from the bridge deck. The reserved protruding steel bars can be embedded in the grouting material, further strengthening the connection between the pier and the protective tube, and effectively improving the overall stiffness and stability of the structure.

[0047] Furthermore, a pier top segment 1 is provided on the top of the pier bottom segment 2. The elevation of the pier top segment 1 is vase-shaped, and a through prestressed channel is provided in the middle thereof.

[0048] Furthermore, the prestressed steel bars 5 connect the abutment 4, the bottom segment 2 of the pier and the top segment 1 of the pier through prestressed channels; the prestressed steel bars 5 run through the entire pier system (from the abutment to the top segment), ensuring a tight connection between the various parts, greatly improving the integrity and rigidity of the structure. The use of the prestressed steel bars 5 enhances the toughness and elastic recovery capacity of the structure, and can better absorb and disperse energy in sudden situations such as earthquakes, providing better seismic protection.

[0049] Furthermore, a grouting bellows is provided on the top of the pedestal 4, and an extended steel bar is provided on the bottom of the pier bottom segment 2. When the pier bottom segment 2 is installed on the top of the pedestal 4, the extended steel bar of the pier bottom segment 2 extends into the grouting bellows on the top of the pedestal 4, and then high-strength grouting material is poured to complete the assembly of the pier bottom segment 2 and the pedestal 4; the extended steel bar can penetrate into the interior of the pedestal, and after the high-strength grouting material is poured between the steel bar and the grouting bellows, a mechanical locking system can be formed, which greatly enhances the connection strength between the pier and the pedestal, thereby improving the integrity and seismic performance of the entire structure, and helping to more effectively transfer the load of the superstructure to the foundation. When the prefabricated components are assembled on site, the pre-set grouting bellows and extended steel bars can make the installation process more convenient and faster, reduce the workload of wet operations on site, and improve construction efficiency.

[0050] Furthermore, an extended steel bar is provided at the bottom of the pier top segment 1, and a grouting bellows is provided at the top of the pier bottom segment 2. When the pier top segment 1 is installed on the top of the pier bottom segment 2, the extended bottom steel bar of the pier top segment 1 is extended into the grouting bellows at the top of the pier bottom segment 2, and high-strength grouting material is poured to complete the assembly of the pier bottom segment 2. The combination of the extended steel bar and the grouting bellows can form a strong mechanical lock, ensuring a high-strength connection between the two segments. The high-strength grouting material is filled between the steel bar and the bellows, providing additional bonding force, enhancing the overall stability and bearing capacity of the structure, and contributing to a more even distribution of the load, reducing stress concentration, and improving seismic performance. The segments can be quickly and accurately spliced ​​on site, reducing the need for on-site welding or other complex processes, and improving construction efficiency. The presence of the grouting bellows makes it easier to align the steel bars and reduces installation time.

[0051] like Figure 5-7 As shown, the triple friction energy dissipation device 6 includes a first connecting plate 608, a plurality of screw holes 610 are arranged around the first connecting plate 608, an external connecting ear plate 607 is fixedly installed in the middle of the top of the first connecting plate 608, a first external connecting arm 603 and a second external connecting arm 604 are respectively arranged on both sides of the top of the external connecting ear plate 607, a copper-type friction plate 601 is arranged between the external connecting ear plate 607 and the first external connecting arm 603, a copper-type friction plate 601 is arranged between the external connecting ear plate 607 and the second external connecting arm 604, the first external connecting arm 603, the external connecting ear plate 607, the second external connecting arm 604 and the copper-type friction plate 601 are rotatably connected by bolts to form a first rotation node, and the friction coefficient between the copper-type friction plate 601 and the first external connecting arm 603 and the second external connecting arm 604 can be improved by adjusting the bolt preload.

[0052] An inner connecting arm 602 is provided between the other ends of the first outer connecting arm 603 and the second outer connecting arm 604, a copper-type friction plate 601 is provided between the first outer connecting arm 603 and the inner connecting arm 602, a copper-type friction plate 601 is provided between the second outer connecting arm 604 and the inner connecting arm 602, and the first outer connecting arm 603, the second outer connecting arm 604, the inner connecting arm 602 and the copper-type friction plate 601 are rotatably connected by bolts to form a second rotation node, and the friction coefficient between the copper-type friction plate 601 and the first outer connecting arm 603 and the second outer connecting arm 604 is increased by adjusting the pre-tightening force of the bolts.

[0053] The triple friction energy dissipation device 6 also includes a second connecting plate 609, which is provided with a plurality of screw holes 610 around it, and a first inner connecting ear plate 605 and a second inner connecting ear plate 606 are fixedly installed on the side of the second connecting plate 609, an inner connecting arm 602 is provided between the first inner connecting ear plate 605 and the second inner connecting ear plate 606, a copper-type friction plate 601 is provided between the first inner connecting ear plate 605 and the inner connecting arm 602, a copper-type friction plate 601 is provided between the second inner connecting ear plate 606 and the inner connecting arm 602, and the first inner connecting ear plate 605, the second inner connecting ear plate 606, the copper-type friction plate 601 and the inner connecting arm 602 are rotatably connected by bolts to form a third rotation node, and the friction coefficient between the copper-type friction plate 601 and the inner connecting arm 602 is increased by adjusting the bolt preload.

[0054] Furthermore, the triple friction energy dissipation device 6 is fixedly connected to the pedestal 4 through the first connection plate 608, and is fixedly connected to the steel casing 3 through the second connection plate 609. According to the load size expected to be borne by the bridge superstructure, an appropriate number of triple friction energy dissipation devices 6 can be flexibly selected and installed to ensure structural safety and optimize energy dissipation effect.

[0055] The triple friction energy dissipation device 6 adopts the lever principle to distribute the rotation angle of the triple friction energy dissipation device 6 transmitted by the sway of the bridge pier to three rotation nodes, and decouples the rotation direction movement of a single node, so that the triple friction energy dissipation device 6 can greatly adapt to any angle change between the bottom segment 2 of the bridge pier and the pedestal 4. Moreover, if the triple friction energy dissipation device is damaged after an earthquake, it can be disassembled and replaced in time, so that the bridge pier can quickly resume its use function. Even if the bridge pier is in an elastic state under the action of a small earthquake or wind load, and the angle between the bottom segment 2 of the bridge pier and the pedestal 4 does not change, the triple friction energy dissipation device 6 at this time can provide reinforcement for the bridge pier, enhance the horizontal resistance and stiffness of the bridge pier, and help the structure maintain a stable state of force.

[0056] The working principle of the novel assembled pier seismic resistance system based on functional separation of the present invention is as follows: when resisting a small earthquake, the pier system has a reliable grouting bellows connection, a prestress applied by the prestressed series, a protective tube 3 protecting the plastic hinge area 21 of the bottom segment 2 of the pier, and an external triple friction energy dissipation device 6, so that the pier system is kept in an elastic state and a stable stress state is maintained; as the intensity of the earthquake continues to increase, the protective tube 3 cracks, the bottom joint of the bottom segment 2 of the pier opens, the plastic hinge area 21 does not show obvious damage, the external triple friction energy dissipation device 6 rotates slightly, the prestressed steel bar 5 deforms, and begins to play a self-resetting role; when resisting a large earthquake, the plastic damage area of ​​the protective tube 3 expands, the opening angle of the bottom joint of the bottom segment 2 of the pier increases, the plastic hinge area 21 shows obvious plastic damage, and the external The triple friction energy dissipation device 6 rotates significantly, exerting a high level of its own energy dissipation and shock absorption, the prestressed steel bar 5 exerts a high level of self-reset, and the pier as a whole exhibits an obvious large-scale reciprocating swing effect; at this time, if the earthquake intensity increases again, the protective tube 3 will show obvious plastic damage, the bottom joint of the bottom segment 2 of the pier will open and close alternately, and the plastic hinge area 21 will be seriously damaged. The shock absorption effect of the external triple friction energy dissipation device 6 and the self-reset function of the prestressed steel bar 5 will be exerted to the extreme, and the overall swing amplitude of the pier will increase again, but no collapse will occur; after the earthquake, the damaged bottom segment 2 of the pier can be replaced by removing the prestressed steel bar 5, and the damaged protective tube 5 will also be replaced immediately, and the external triple friction energy dissipation device 6 can replace the copper friction plate 601 or multiple components according to the damage status.

[0057] Example 2

[0058] Combination Figure 1-7 ,like Figure 8 As shown, the present invention provides an assembly method of a novel assembled pier seismic resistant system based on functional separation, and the specific steps are as follows:

[0059] S100: Customize the template according to the drawings of each component. When prefabricating the top segment 1 of the pier, reserve the prestressed steel bar channel and the bottom protruding steel bar. When prefabricating the bottom segment 2 of the pier, use a specially customized template for the plastic hinge area 21 to correct the position of the steel bar skeleton to ensure sufficient protective layer thickness of the concrete, reserve the grouting corrugated pipe and the bottom protruding steel bar. When prefabricating the cap 4, reserve the grouting corrugated pipe hole at the top of the cap 4.

[0060] S200: using high-ductility cement-based composite materials to manufacture the protective tube 3, reserving grouting bellows at the top and bottom of the protective tube 3, and prefabricating various accessories of the triple friction energy dissipation device 6 according to the design drawings;

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

[0062] S400: After the installation of the cap 4 is completed, the prestressed steel bar 5 is anchored at the bottom of the cap 4, and the prestressed steel bar 5 passes through the reserved channel of the cap 4 and extends to the outside of the cap 4. The pier bottom segment 2 is hoisted, and the prestressed steel bar 5 passing through the bottom of the cap 4 passes through the reserved channel of the pier bottom segment 2. At the same time, the outward extension steel bar reserved for the pier bottom segment 2 is extended along the reserved grouting corrugated pipe at the top of the cap 4, and high-strength grouting material is poured on the side to complete the assembly of the pier bottom segment 2 and the cap 4;

[0063] S500: Use a crane to hoist the pier top segment 1 onto the pier bottom segment 2, and pass the prestressed steel bars 5 extending outward from the pier bottom segment 2 through the reserved channel of the pier top segment 1. At the same time, the reserved outward bottom steel bars of the pier top segment 1 extend into the reserved grouting corrugated pipe channel at the top of the pier bottom segment 2, and high-strength grouting material is poured in. After the pier top segment 1 is assembled, the prestressed steel bars 5 are tensioned on the top of the pier top segment 1 and anchored to the top of the pier.

[0064] S600: After all the segments of the pier are assembled, the protective cylinder 3 is installed at the position of the plastic hinge area 21 of the segment 2 at the bottom of the pier, and the longitudinal steel bars extending out of the installation area of ​​the protective cylinder 3 reserved in the plastic hinge area 21 are extended into the grouting bellows at the top and bottom of the protective cylinder 3, and high-strength grouting material is introduced to complete the grouting assembly connection of the high-ductility protective cylinder 3;

[0065] S700: Install the triple friction energy dissipation device around the bottom segment 2 of the pier, and fix it to the base through the first connecting plate 608, and fix it to the protective tube 3 through the second connecting plate 609.

[0066] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of prefabricated bridge pier seismic system based on functional separation, characterized in that: It comprises a bridge pier top segment (1), a bridge pier bottom segment (2), a protective tube (3), a cap (4), prestressed steel bars (5), and a triple friction energy dissipation device (6); The cap (4) is arranged at the top of the pile foundation, a pier bottom segment (2) is arranged in the middle of the top of the cap (4), the pier bottom segment (2) is a square column, and a plastic hinge area (21) is arranged around the middle and lower area, a protective cylinder (3) is arranged outside the plastic hinge area (21), and a pier top segment (1) is arranged on the top of the pier bottom segment (2); The prestressed steel bars (5) connect the abutment (4), the pier bottom segment (2) and the pier top segment (1) through the prestressed duct; The triple friction energy dissipation device (6) comprises a first connecting plate (608) and a second connecting plate (609); an external connecting ear plate (607) is fixedly installed in the middle of the top of the first connecting plate (608); a first external connecting arm (603) and a second external connecting arm (604) are respectively provided on both sides of the top of the external connecting ear plate (607); a copper-type friction plate (601) is provided between the external connecting ear plate (607) and the first external connecting arm (603); a copper-type friction plate (601) is provided between the external connecting ear plate (607) and the second external connecting arm (604); an inner connecting arm (602) is provided between the other ends of the first external connecting arm (603) and the second external connecting arm (604); A copper-type friction plate (601) is provided between an outer connecting arm (603) and an inner connecting arm (602); a copper-type friction plate (601) is provided between the second outer connecting arm (604) and the inner connecting arm (602); a first inner connecting ear plate (605) and a second inner connecting ear plate (606) are fixedly mounted on the side of the second connecting plate (609); an inner connecting arm (602) is provided between the first inner connecting ear plate (605) and the second inner connecting ear plate (606); a copper-type friction plate (601) is provided between the first inner connecting ear plate (605) and the inner connecting arm (602); and a copper-type friction plate (601) is provided between the second inner connecting ear plate 606 and the inner connecting arm (602).

2. The novel assembled bridge pier seismic resistance system based on functional separation according to claim 1 is characterized in that: The top and bottom of the protective tube (3) are both provided with grouting corrugated pipes, and the contact position between the pier bottom segment (2) and the protective tube (3) is both provided with protruding steel bars.

3. The novel assembled bridge pier seismic resistance system based on functional separation according to claim 1 is characterized in that: A through prestressed channel is provided between the bridge pier top segment (1), the bridge pier bottom segment (2), and the cap (4).

4. The novel assembled bridge pier seismic resistance system based on functional separation according to claim 3 is characterized in that: The top of the pedestal (4) is provided with a grouting corrugated pipe, the bottom of the pier bottom section (2) is provided with an outwardly extending steel bar, the top is provided with a grouting corrugated pipe, and the bottom of the pier top section (1) is provided with an outwardly extending steel bar.

5. A novel assembled bridge pier seismic resistance system based on functional separation according to any one of claims 1 to 4, characterized in that: The first outer connecting arm (603), the outer connecting ear plate (607), the second outer connecting arm (604) and the copper-type friction plate (601) are rotationally connected via bolts to form a first rotation node.

6. A novel assembled bridge pier seismic resistance system based on functional separation according to any one of claims 1 to 4, characterized in that: The first outer connecting arm (603), the second outer connecting arm (604), the inner connecting arm (602) and the copper-type friction plate (601) are rotationally connected via bolts to form a second rotation node.

7. A novel prefabricated bridge pier seismic resistance system based on functional separation according to any one of claims 1 to 4, characterized in that: The first inner connecting ear plate (605), the second inner connecting ear plate (606), the copper friction plate (601) and the inner connecting arm (602) are rotatably connected by bolts to form a third rotation node.

8. A novel prefabricated bridge pier seismic resistance system based on functional separation according to any one of claims 1 to 4, characterized in that: A plurality of screw holes (610) are arranged around the first connecting plate (608) and the second connecting plate (609).

9. A novel assembled bridge pier seismic resistance system based on functional separation according to any one of claims 1 to 4, characterized in that: The triple friction energy dissipation device (6) is fixedly connected to the support platform (4) via a first connecting plate (608), and is fixedly connected to the steel casing (3) via a second connecting plate (609).

10. An assembly method of a novel assembled bridge pier seismic resistance system based on functional separation as claimed in any one of claims 1 to 9, characterized in that: The steps include: S100: Customize the template according to the drawings of each component. When prefabricating the top segment (1) of the bridge pier, reserve the prestressed steel bar channel and the bottom protruding steel bar. When prefabricating the bottom segment (2) of the bridge pier, use a specially customized template in the plastic hinge area (21), correct the position of the steel bar skeleton, ensure sufficient protective layer thickness of the concrete, reserve the grouting corrugated pipe and the bottom protruding steel bar. When prefabricating the cap (4), reserve the grouting corrugated pipe hole at the top of the cap (4); S200: using high-ductility cement-based composite materials to manufacture the protective tube (3), reserving grouting bellows at the top and bottom of the protective tube (3), and prefabricating various accessories of the triple friction energy dissipation device (6) according to the design drawings; S300: transporting the prefabricated components to the construction site, carrying out pile foundation construction, including drilling, hole cleaning, bottom cleaning and steel cage hoisting, pouring pile foundation concrete, and then installing the prefabricated cap (4) on the top of the pile foundation; S400: After the installation of the cap (4) is completed, the prestressed steel bars (5) are anchored at the bottom of the cap (4), and the prestressed steel bars (5) pass through the reserved channel of the cap (4) and extend to the outside of the cap (4), and the pier bottom segment (2) is hoisted, and the prestressed steel bars (5) passing through the bottom of the cap (4) pass through the reserved channel of the pier bottom segment (2). At the same time, the reserved extended steel bars of the pier bottom segment (2) extend along the reserved grouting corrugated pipe at the top of the cap (4), and high-strength grouting material is poured on the side, and the assembly of the pier bottom segment (2) and the cap (4) is completed; S500: Using a crane to hoist the top segment (1) of the pier onto the bottom segment (2) of the pier, passing the protruding prestressed steel bars (5) of the bottom segment (2) of the pier through the reserved channel of the top segment (1) of the pier. At the same time, the protruding bottom steel bars reserved in the top segment (1) of the pier are extended into the reserved grouting corrugated pipe channel at the top of the bottom segment (2) of the pier, and high-strength grouting material is poured in. After the top segment (1) of the pier is assembled, the prestressed steel bars (5) are tensioned on the top of the top segment (1) of the pier, and anchored to the top of the pier. S600: After all the segments of the bridge pier are assembled, the protective cylinder (3) is installed at the position of the plastic hinge area (21) of the bottom segment (2) of the bridge pier, and the longitudinal steel bars extending from the installation area of ​​the protective cylinder (3) reserved in the plastic hinge area (21) are inserted into the grouting bellows at the top and bottom of the protective cylinder (3), and high-strength grouting material is introduced to complete the grouting assembly connection of the high-ductility protective cylinder (3); S700: The triple friction energy dissipation device (6) is installed around the bottom segment (2) of the bridge pier, and is fixedly connected to the base through a first connecting plate (608), and is fixedly connected to the protective tube (3) through a second connecting plate (609).

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