Novel fabricated pier energy dissipation and shock absorption device and process thereof

Abstract

The invention relates to a novel fabricated bridge pier energy dissipation and seismic mitigation device and a process thereof, and belongs to the technical field of fabricated bridge engineering energy dissipation and seismic mitigation, and the novel fabricated bridge pier energy dissipation and seismic mitigation device comprises belleville springs, eight U-shaped dampers, a top plate and a bottom plate. The top plate is provided with first bolt holes to be in bolting connection with double pre-embedded nuts of an assembly type bridge deck slab, the bottom plate is provided with second bolt holes to be in bolting connection with double pre-embedded nuts of an assembly type bridge pier, and the bottom and the top of the U-shaped damper are provided with first through holes and second through holes correspondingly. And the through holes are respectively bolted with the reserved through holes of the second connecting plate and the first connecting plate. According to the invention, earthquake energy can be dissipated, vibration caused by load of moving vehicles can be reduced, maintenance and replacement are easy, maintenance cost is saved to a great extent, replacement work difficulty is reduced, development of an energy dissipation and shock absorption engineering technology of the fabricated pier is facilitated, and the requirements of dual-carbon strategy and energy conservation and emission reduction are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge engineering, and particularly relates to a novel assembled bridge pier energy dissipation and shock absorption device and a process thereof. BACKGROUND

[0002] At present, cast-in-situ concrete construction mode is widely used in highway and urban bridge construction in China, which has long construction period, large environmental pollution and large energy consumption, and does not conform to the "double carbon strategy" and energy saving and emission reduction. On the other hand, the assembled construction develops rapidly, and the bridge construction gradually adopts the mode of manufacturing segments in the factory and assembling on site. Therefore, the corresponding bridge auxiliary engineering may need to be improved or replaced. The traditional bridge pier energy dissipation and shock absorption device has high integration degree, and any damaged part must be replaced in its entirety, which greatly increases the maintenance cost and replacement difficulty.

[0003] It can be seen that the bridge construction needs a bridge pier energy dissipation and shock absorption device which is accurate, efficient, easy to maintain and replace part of the components, so as to avoid damage caused by earthquakes and moving vehicle loads and realize its transportation function. Therefore, it is urgent to develop a novel and efficient energy dissipation and shock absorption device in the field of assembled bridge pier energy dissipation and shock absorption. SUMMARY

[0004] One of the purposes of the present application is to provide a novel assembled bridge pier energy dissipation and shock absorption device which can efficiently solve the engineering problems proposed in the background. The second purpose of the present application is to provide a construction process of the novel assembled bridge pier energy dissipation and shock absorption device to achieve the first purpose of the present application.

[0005] To achieve the above-mentioned first purpose, the present application provides a novel assembled bridge pier energy dissipation and shock absorption device, which comprises a U-shaped damper (2), a top plate (5), a bottom plate (4) and a butterfly spring (6), wherein the U-shaped damper (2) is a memory alloy damper. The butterfly spring (6) is located in the middle of the U-shaped damper in four directions.

[0006] Preferably, the U-shaped damper has a total of 8 pieces, two pieces are a group and are located in the "front, rear, left and right" four directions of the device respectively.

[0007] Further, a U-shaped damper first through hole (21) is formed at the bottom end of the U-shaped damper, and a U-shaped damper second through hole (22) is formed at the top end of the U-shaped damper.

[0008] Further, the U-shaped damper first through hole (21) is connected with the bottom plate through hole (42) through the bottom plate screw (44) and the bottom plate nut (45), and realizes fixed connection with the second connecting plate (43).

[0009] Further, the second through hole (22) of the U-shaped damper is connected with the top plate through hole (52) through the top plate screw rod (54) and the top plate nut (55), and fixed connection with the first connecting plate (53) is realized.

[0010] Further, the bottom plate (4) is provided with second bolt holes (41) at four corners, and four second connecting plates (43) are connected with the bottom plate and located in the middle of a group of U-shaped dampers.

[0011] Further, the top plate (5) is provided with first bolt holes (51) at four corners, and four first connecting plates (53) are connected with the top plate and located in the middle of a group of U-shaped dampers.

[0012] To achieve the above-mentioned purposes, the application provides a new type of fabricated bridge pier energy dissipation and shock absorption process, and the construction and installation process comprises the following steps: A. When the bridge deck slab (1) is prefabricated in the factory, double nuts (7) are pre-buried at the bottom of the bridge deck slab corresponding to the shock absorption device for standby; B. When the bridge pier (3) is prefabricated in the factory, double nuts (7) are pre-buried at the top of the bridge pier corresponding to the shock absorption device for standby; C. According to the new type of fabricated bridge pier energy dissipation and shock absorption device according to claims 1-8, the combination process is as follows: first, the butterfly spring is placed in the center of the bottom plate, second, the U-shaped damper is installed in the inner and outer sides of the second connecting plate (43), the first through hole (21) of the U-shaped damper corresponds to the bottom plate through hole (42), and is fixedly connected through the bottom plate screw rod (44) and the bottom plate nut (45), a total of eight U-shaped dampers are installed on the four surfaces in turn, third, the top plate is installed on the top, the first connecting plate (53) is inserted into the top end of the U-shaped damper, the U-shaped damper (22) corresponds to the top plate through hole (52), and is fixedly connected through the top plate screw rod (54) and the top plate nut (55); D. The screw rod is connected with the double nuts (7) pre-buried at the bottom of the bridge deck slab in step A through the first bolt hole (51); E. The screw rod is connected with the double nuts (7) pre-buried at the top of the bridge pier in step B through the second bolt hole (41).

[0013] Compared with the prior art, the application has the following beneficial effects: The application provides a new type of fabricated bridge pier energy dissipation and shock absorption device and process, which can realize the energy dissipation and shock absorption function of the bridge pier structure. The force transmission path of the application is simple, the butterfly spring mainly bears the axial force, and the U-shaped damper can bear complex loads, especially spatial seismic vibration and irregular moving vehicle load. It is worth noting that the traditional bridge pier energy dissipation and shock absorption device has high integration degree, and any damaged part needs to be replaced as a whole, which increases the maintenance cost and workload, while the energy dissipation and shock absorption device provided by the application is easy to prefabricate in batches and easy to assemble, so it is easier to replace the damaged parts in time. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the construction project of the bridge pier energy dissipation and vibration reduction device described in this embodiment of the invention; Figure 2 This is a schematic diagram of the overall structure of the bridge pier energy dissipation and vibration reduction device described in this embodiment of the invention; Figure 3 This is a side view of the bridge pier energy dissipation and vibration reduction device described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the bridge pier energy dissipation and vibration reduction device after removing the bottom plate, as described in this embodiment of the invention. Figure 5 This is a schematic diagram of the bridge pier energy dissipation and vibration reduction device after removing the top plate, as described in this embodiment of the invention. Figure 6 This is a schematic diagram of the U-shaped damper in the bridge pier energy dissipation and vibration reduction device described in this embodiment of the invention; Figure 7 This is a schematic diagram of the base plate of the bridge pier energy dissipation and vibration reduction device described in this embodiment of the invention; Figure 8 This is a schematic diagram of the top plate of the bridge pier energy dissipation and vibration reduction device described in this embodiment of the invention; In the diagram: 1 is the bridge deck, 2 is the U-shaped damper, 21 is the first through hole of the U-shaped damper, 22 is the second through hole of the U-shaped damper, 23 is the nut of the U-shaped damper, 24 is the screw of the U-shaped damper, 3 is the pier, 4 is the base plate, 41 is the second bolt hole, 42 is the through hole of the base plate, 43 is the second connecting plate, 44 is the screw of the base plate, 45 is the nut of the base plate, 5 is the top plate, 51 is the first bolt hole, 52 is the through hole of the top plate, 53 is the first connecting plate, 54 is the screw of the top plate, 55 is the nut of the top plate, 6 is the disc spring, 7 is the pre-embedded double nut, and 8 is the screw. Detailed Implementation

[0015] The technical solutions and process flows of the embodiments of the present invention are clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. The purpose of the accompanying drawings is to supplement the textual description with graphics, enabling a more intuitive and vivid understanding of each technical feature and the overall technical solution of the present invention, and to more clearly understand the process flow of the present invention. However, they should not be construed as limiting the scope of protection of the present invention. Based on the embodiments summarized in this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0016] In the description of this invention, unless explicitly defined, terms such as "located," "installed," and "connected" are interpreted broadly. For example, "connected" can refer to welding or the process of obtaining an integral component in a factory through cutting. Terms such as "front," "rear," "left," and "right" are reasonable interpretations specific to the accompanying drawings in this embodiment. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0017] Example 1 Please see Figure 1 The diagram shows the actual construction process of the present invention. The device is installed between the bridge deck and the pier. Double nuts (7) are pre-embedded at the positions corresponding to the second bolt holes (41) on the bottom of the bridge deck and the top plate of the device. Double nuts (7) are pre-embedded at the positions corresponding to the first bolt holes (51) on the top plate of the device and the top of the pier. Both are fixedly connected by screws.

[0018] Please continue reading. Figures 2-8 The butterfly spring (6) is located in the center of the device. The butterfly spring is made of high-quality spring steel 60Si2MNA or 50CrVA according to the "Butterfly Spring" (GB / T 1972-2005). There are a total of 8 U-shaped dampers (2), with two pieces in a group located in the four directions of "front, back, left and right" of the device. The U-shaped dampers are memory alloy dampers.

[0019] The U-shaped damper has a first through hole (21) at its bottom and a second through hole (22) at its top. The first through hole (21) is connected to the bottom plate through hole (42) via a bottom plate screw (44) and a bottom plate nut (45), thus achieving a fixed connection with the second connecting plate (43). The second through hole (22) is connected to the top plate through hole (52) via a top plate screw (54) and a top plate nut (55), thus achieving a fixed connection with the first connecting plate (53).

[0020] Please see Figure 7 The base plate (4) has second bolt holes (41) at its four corners. Four second connecting plates (43) are connected to the base plate and are located in the middle of a set of U-shaped dampers.

[0021] Please see Figure 8 The top plate (5) has first bolt holes (51) at its four corners, and four first connecting plates (53) are connected to the top plate and located in the middle of a set of U-shaped dampers.

[0022] Example 2 Please see Figures 1-8 The construction process of a new type of prefabricated bridge pier energy dissipation and vibration reduction device includes the following steps: A. When prefabricating the bridge deck (1) in the factory, double nuts (7) are pre-embedded at the bottom of the bridge deck corresponding to the shock absorption device for later use; B. When prefabricating the bridge piers (3) in the factory, double nuts (7) are pre-embedded at the top of the bridge piers at the location corresponding to the shock absorption device for future use; C. A novel prefabricated bridge pier energy dissipation and vibration reduction device according to claims 1-8, the assembly process is as follows: First, place the butterfly spring (6) in the center of the base plate; second, install the U-shaped dampers (2) in pairs on the inner and outer sides of the second connecting plate (43), the first through hole (21) of the U-shaped damper corresponds to the through hole (42) of the base plate, and fix them together by the base plate screw (44) and the base plate nut (45), and install a total of eight U-shaped dampers on the four surfaces in sequence; third, install the top plate on the top, insert the first connecting plate (53) into the top of the U-shaped damper, the U-shaped damper (22) corresponds to the through hole (52) of the top plate, and fix them together by the top plate screw (54) and the top plate nut (55); D. Connect the screw through the first bolt hole (51) to the double nut (7) pre-embedded in the bottom of the bridge deck in step A; E. Connect the screw through the second bolt hole (41) to the double nut (7) pre-embedded in the top of the pier in step B.

[0023] Embodiments 1 and 2 of the present invention are provided for illustrative and descriptive purposes only and do not represent a complete disclosure of all embodiments of the invention. Many rearrangements and variations will be apparent to those skilled in the art. For example, the U-shaped damper consists of eight pieces arranged in pairs for ease of explanation; twelve pieces could also be used, arranged in groups of three. Furthermore, the U-shaped dampers can be arranged not only in the "front, rear, left, and right" positions but also around the disc spring. Therefore, Embodiments 1 and 2 are chosen and provided to better illustrate the principles and practical applications of the invention, facilitating understanding and application by those skilled in the art, thereby enabling the design and expansion of various embodiments with modifications suitable for specific applications.

Claims

1. A novel prefabricated bridge pier energy dissipation and vibration reduction device, characterized in that, It includes a U-shaped damper (2), a top plate (5), a bottom plate (4) and a butterfly spring (6), wherein the U-shaped damper (2) is a shape memory alloy damper.

2. The novel prefabricated bridge pier energy dissipation and vibration reduction device according to claim 1, characterized in that, The U-shaped dampers consist of a total of 8 pieces, arranged in pairs, and are located in the four directions of the device: front, back, left, and right.

3. A novel prefabricated bridge pier energy-dissipating and vibration-damping device according to claims 1 and 2, characterized in that, The U-shaped damper has a first through hole (21) at the bottom and a second through hole (22) at the top.

4. A novel prefabricated bridge pier energy-dissipating and vibration-damping device according to claims 1, 2, and 3, characterized in that, The first through hole (21) of the U-shaped damper is connected to the through hole (42) of the base plate through the base plate screw (44) and the base plate nut (45) to achieve a fixed connection with the second connecting plate (43).

5. A novel prefabricated bridge pier energy-dissipating and vibration-damping device according to claims 1, 2, and 3, characterized in that, The second through hole (22) of the U-shaped damper is connected to the through hole (52) of the top plate through the top plate screw (54) and the top plate nut (55) to achieve a fixed connection with the first connecting plate (53).

6. The disc spring (6) according to claim 1 is located in the middle of the U-shaped damper in four directions.

7. A novel prefabricated bridge pier energy-dissipating and vibration-damping device according to claim 1, characterized in that, The base plate (4) has second bolt holes (41) at its four corners, and four second connecting plates (43) are connected to the base plate and located in the middle of a group of U-shaped dampers in the same direction.

8. A novel prefabricated bridge pier energy-dissipating and vibration-damping device according to claim 1, characterized in that, The top plate (5) has first bolt holes (51) at its four corners, and four first connecting plates (53) are connected to the top plate and located in the middle of a group of U-shaped dampers in the same direction.

9. A novel energy-dissipating and vibration-damping technology for prefabricated bridge piers, characterized in that: Its construction and installation process includes the following steps: A. When prefabricating the bridge deck (1) in the factory, double nuts (7) are pre-embedded at the bottom of the bridge deck corresponding to the shock absorption device for later use; B. When prefabricating the bridge piers (3) in the factory, double nuts (7) are pre-embedded at the top of the bridge piers at the location corresponding to the shock absorption device for future use; C. A novel prefabricated bridge pier energy dissipation and vibration reduction device according to claims 1-8, the assembly process is as follows: First, place the butterfly spring in the center of the base plate; second, install the U-shaped dampers in pairs on the inner and outer sides of the second connecting plate (43), the first through hole (21) of the U-shaped damper corresponds to the through hole (42) of the base plate, and fix them together by the base plate screw (44) and the base plate nut (45), and install a total of eight U-shaped dampers on the four surfaces in sequence; third, install the top plate on the top, the first connecting plate (53) is inserted into the top of the U-shaped damper, the U-shaped damper (22) corresponds to the through hole (52) of the top plate, and fix them together by the top plate screw (54) and the top plate nut (55); D. Connect the screw through the first bolt hole (51) to the double nut (7) pre-embedded in the bottom of the bridge deck in step A; E. Connect the screw through the second bolt hole (41) to the double nut (7) pre-embedded in the top of the pier in step B.

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