Segmental assembling pier anti-collision energy dissipation device and splicing method thereof

Abstract

The present application relates to a kind of segmental assembled pier anti-collision energy dissipation device and its splicing method, belong to bridge engineering anti-collision device field, solve the problem of poor anti-collision ability and shear capacity of the prior art in assembled pier.A kind of segmental assembled pier anti-collision energy dissipation device includes shear steel plate, FRP lattice, FRP shell and anti-collision shell;Shear steel plate is installed on two adjacent precast piers, so that shear steel plate can span the joint seam between two precast piers, the side of shear steel plate away from precast pier is sequentially provided with FRP lattice, FRP shell and anti-collision shell.The present application improves the shear bearing capacity of the position of precast pier segment, thereby reducing the shear damage of precast assembled bridge connecting segment under impact load, reduces the shear displacement between joint seam, improves the crashworthiness and safety of bridge.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering collision protection devices, and in particular to a segmental assembly bridge pier collision protection energy dissipation device and its splicing method. Background Technology

[0002] Precast segmental bridges are increasingly used in engineering projects due to their advantages of convenient construction, minimal impact on the surrounding environment, and short construction period. However, in actual use, when subjected to impact loads such as vehicle collisions, ship collisions, and ice floe impacts, the precast structure can experience concentrated damage at the splicing points, along with significant interface slippage at the splice joints. Excessive displacement at the splice interface can lead to bridge structural collapse and even serious consequences such as casualties. Therefore, it is necessary to install anti-collision devices at the segment assembly points of precast segmental bridges to avoid or reduce structural damage caused by impact loads.

[0003] Domestic and international scholars have conducted crashworthiness studies on different types of precast bridges. The results show that for unbonded segmental precast bridges, the shear capacity at the joints is lower than that of cast-in-place bridges under impact loads. Significant slippage is prone to occur at the joints, weakening the crashworthiness and reducing safety. Existing crashworthiness research on precast bridges mainly focuses on the shear performance of the joints, attempting to improve crashworthiness by modifying joint shapes and segment connection methods. However, existing improvement technologies do not significantly enhance the crashworthiness of precast bridges and cannot guarantee good impact resistance at the joints when subjected to impact loads. Although various crashworthiness energy dissipation devices exist for bridge piers, these devices are primarily designed for cast-in-place bridges, focusing mainly on energy dissipation with poor shear capacity, and cannot significantly improve the shear capacity of precast pier joints. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a segmental assembly bridge pier anti-collision energy dissipation device and its splicing method, so as to solve the problems of poor anti-collision and shear resistance of existing assembled bridge piers.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A segmental precast bridge pier anti-collision energy dissipation device includes a shear steel plate, an FRP lattice, an FRP shell, and an anti-collision shell. The shear steel plate is installed on two adjacent precast bridge piers, so that the shear steel plate can span the splice joint between the two precast bridge piers. The FRP lattice, the FRP shell, and the anti-collision shell are sequentially arranged on the side of the shear steel plate away from the precast bridge pier.

[0007] Furthermore, it also includes pre-embedded bolts.

[0008] Furthermore, the pre-embedded bolts are installed at both ends of the precast bridge pier.

[0009] Furthermore, the shear-resistant steel plate has first connection reserved holes at both ends; the FRP lattice has second connection reserved holes at both ends.

[0010] Furthermore, the first and second connection reserved holes have the same diameter.

[0011] Furthermore, the pre-embedded bolts can pass through the first and second connection reserved holes to connect with the shear steel plate and the FRP lattice.

[0012] Furthermore, it also includes shear-resistant steel plate connecting nuts.

[0013] Furthermore, the shear-resistant steel plate connecting nut connects the shear-resistant steel plate and the FRP lattice to the precast bridge pier via pre-embedded bolts.

[0014] Furthermore, a method for assembling a segmental bridge pier collision-resistant energy dissipation device, employing such a device, includes the following specific steps:

[0015] Step 1: Install the pre-embedded bolts;

[0016] Step 2: Install individual segmental pier anti-collision energy dissipation devices;

[0017] Step 3: Assemble multiple segments of the bridge pier anti-collision energy dissipation device installed in Step 2.

[0018] Furthermore, in step 1, before construction, pre-embedded bolts are installed inside the precast bridge piers.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] (1) The segmental precast pier anti-collision energy dissipation device of the present invention is installed on the splice joint 9 formed by adjacent precast piers 8. On the side away from the precast pier 8, a shear steel plate 1, an FRP lattice 4, an FRP shell 5, and an anti-collision shell 6 are installed in sequence. When the pier is subjected to an impact load, the precast precast pier anti-collision energy dissipation device can first disperse the impact load through the anti-collision shell 6, so that the impact load is transferred to the FRP shell 5 and the FRP lattice 4 in contact with the anti-collision shell 6, thereby utilizing the entire FRP lattice 4 to dissipate energy, so that the FRP lattice 4 consumes most of the impact load energy, and the remaining impact load energy is then applied to the shear steel plate 1. When the shear plate 1 bears the remaining impact load, it distributes the impact load to the precast piers 8 on both sides of the splice joint 9, reducing the local stress concentration at the splice joint 9 and greatly improving the shear bearing capacity of the precast pier 8 segments. This reduces the shear damage to the precast assembled bridge connection segments under vehicle, ship, or ice floe impact loads, avoids or reduces shear displacement between splices, and improves the bridge's impact resistance and safety.

[0021] (2) The present invention also includes embedded bolts at both ends of the precast pier, i.e., embedded bolts are set on both sides of the splice joint to position the shear steel plate and FRP lattice and to fix them in place. The diameter of the embedded bolts on the precast pier is the same as the diameter of the first connection reserved hole of the shear steel plate and the second connection reserved hole of the FRP lattice. The positions of the embedded bolts, the first connection reserved hole and the second connection reserved hole are matched and matched with each other. This allows the shear steel plate and FRP lattice to be positioned and matched with the embedded bolts through the connection reserved hole when they are installed on the precast pier, ensuring the accuracy of the installation. At the same time, it avoids the measurement process, simplifies the installation process, and greatly reduces the construction time.

[0022] (3) The FRP lattice of the present invention is made of FRP board. The FRP lattice is a spatial grid type. Its interior can be filled with high-performance buffer energy dissipation material to form a composite structure for absorbing the energy of the impact process and reducing the impact load. Under the action of impact load, the FRP lattice can reduce the impact force and consume energy, thereby improving the structural impact safety margin.

[0023] (4) The impact-resistant shell of the present invention is a closed annular shell surrounding the outer wall of the FRP shell. It is made of steel and has high rigidity, which can directly withstand impact loads. Under the direct impact of the impact load, the impact-resistant shell as a whole will move along the impact direction, and the closed annular impact-resistant shell can transfer the load to the impact-back side, thereby dispersing the large local impact force to the entire FRP lattice inside the impact-resistant shell for energy dissipation, thereby consuming impact energy, reducing local damage on the impact side, dispersing impact force, and increasing the load-bearing range.

[0024] (5) The segmental assembly bridge pier anti-collision energy dissipation device of the present invention does not involve the pouring of concrete structure, so it is easy to install. During the service life, when the bridge is subjected to impact load and the energy dissipation device is damaged, it is only necessary to remove the damaged parts of the segmental assembly bridge pier anti-collision energy dissipation device and replace them with new parts. This makes the maintenance process of the entire segmental assembly bridge pier anti-collision energy dissipation device short and simple to operate.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or may be learned by practicing the invention. Attached Figure Description

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0027] Figure 1 This is a schematic diagram of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention;

[0028] Figure 2 This is a top view of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention;

[0029] Figure 3 This is a partial enlarged view of the FRP lattice structure of the present invention;

[0030] Figure 4 This is a top view of the assembly of an embodiment of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention;

[0031] Figure 5 This is an installation diagram of one embodiment of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention;

[0032] Figure 6 This is a top view of the assembly of another embodiment of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention;

[0033] Figure 7 This is an installation diagram of another embodiment of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention.

[0034] Figure label:

[0035] 1-Shear-resistant steel plate; 2-Embedded bolt; 3-Shear-resistant steel plate connecting nut; 4-FRP lattice structure; 41-Arc-shaped elastic energy dissipation element; 42-Linear elastic energy dissipation element; 5-FRP shell; 6-Impact-resistant shell; 7-Impact-resistant shell embedded bolt; 8-Precast pier; 9-Splice joint; 10-Impact-resistant energy dissipation device connecting joint; 11-Shear-resistant steel plate splice plate; 12-Shear-resistant steel plate splice plate mounting bolt; 13-Impact-resistant shell splice plate; 14-Impact-resistant shell splice plate mounting bolt; 15-FRP shell splice plate; 16-FRP shell splice plate mounting bolt. Detailed Implementation

[0036] The following detailed description, in conjunction with specific embodiments, provides a segmental assembly bridge pier anti-collision energy dissipation device and its splicing method. These embodiments are for comparative and illustrative purposes only, and the present invention is not limited to these embodiments.

[0037] Example 1

[0038] A specific embodiment of the present invention, such as Figures 1-2 As shown, a segmental precast bridge pier anti-collision energy dissipation device is disclosed, including a shear steel plate 1, an FRP lattice 4, an FRP shell 5, and an anti-collision shell 6. The shear steel plate 1 is installed on two adjacent precast bridge piers 8, so that the shear steel plate 1 can span the splice joint 9 of the two precast bridge piers 8. The side of the shear steel plate 1 away from the precast bridge pier 8 is provided with the FRP lattice 4, the FRP shell 5, and the anti-collision shell 6 in sequence.

[0039] When the bridge pier is subjected to impact load, the prefabricated bridge pier anti-collision energy dissipation device can first disperse the impact load through the anti-collision shell 6, so that the impact load is transferred to the FRP shell 5 and FRP lattice 4 in contact with the anti-collision shell 6, thereby utilizing the entire FRP lattice 4 to dissipate energy, so that the FRP lattice 4 consumes most of the impact load energy, and the remaining impact load energy is then applied to the shear steel plate 1.

[0040] It is worth noting that the main function of the shear steel plate 1 is to improve the shear bearing capacity of the splice joint 9. It serves as the installation base plate in the entire prefabricated bridge pier anti-collision energy dissipation device structure. The FRP lattice 4 is then installed on the outside of the shear steel plate 1. The installation method is mainly bolt connection, and the shear steel plate 1 and the FRP lattice 4 can be installed at the same time.

[0041] When the shear plate 1 bears the remaining impact load, it distributes the impact load to the precast piers 8 on both sides of the splice joint 9, reducing the local stress concentration at the splice joint 9 and greatly improving the shear bearing capacity of the precast pier 8 segments. This reduces the shear damage to the precast assembled bridge connection segments under vehicle, ship, or ice floe impact loads, avoids or reduces shear displacement between splices, and improves the bridge's impact resistance and safety.

[0042] Furthermore, it also includes pre-embedded bolts 2, which are set at both ends of the precast pier 8. In other words, the pre-embedded bolts 2 are set on both sides of the splice joint 9 to position the anti-shear steel plate 1 and the FRP lattice 4, and to play a role in fixing the anti-shear steel plate 1 and the FRP lattice 4.

[0043] In the actual installation process, the pre-embedded bolts 2 are first installed in the mold of the precast pier 8 and the pre-embedded bolts 2 are positioned and fixed. Then the precast pier 8 is poured and processed. After the precast pier 8 is assembled at the pier installation site, the anti-collision energy dissipation device of the precast pier is installed.

[0044] Alternatively, if collision protection is to be provided for existing precast bridges, holes can be drilled on both sides of the existing pier splice joint 9, and then bolts can be embedded using expansion bolts to complete the installation of the pre-embedded bolts 2. Then, the collision energy dissipation device for the precast piers can be installed.

[0045] Furthermore, the shear-resistant steel plate 1 has first connection reserved holes at both ends, and the FRP lattice 4 has second connection reserved holes at both ends.

[0046] Specifically, the diameter of the pre-embedded bolts 2 on the precast pier 8 is the same as the diameter of the first connection reserved hole of the shear steel plate 1 and the second connection reserved hole of the FRP lattice 4. The positions of the pre-embedded bolts 2, the first connection reserved hole and the second connection reserved hole are matched and matched with each other. This allows the shear steel plate 1 and the FRP lattice 4 to be positioned and matched with the position of the connection reserved hole and the pre-embedded bolts 2 when they are installed on the precast pier 8. This ensures the accuracy of the installation, avoids the measurement process, simplifies the installation process and greatly reduces the construction time.

[0047] Furthermore, it also includes shear plate connecting nuts 3, which work together with embedded bolts 2 to connect shear plate 1 and FRP lattice 4 to precast pier 8.

[0048] Furthermore, the FRP lattice 4 is fabricated from FRP sheets and is a spatial grid type. It can be filled with high-performance buffer and energy-dissipating materials to form a composite structure that absorbs energy during impact and reduces impact load. Under impact loads, the FRP lattice 4 primarily functions to reduce impact force and dissipate energy, thus improving the structure's crashworthiness margin.

[0049] It is worth noting that FRP materials are lightweight, high-strength, and have good corrosion resistance. They are also highly designable, allowing for flexible design of the required structures and shapes according to needs, making them widely applicable in large-scale projects.

[0050] It is worth noting that, such as Figure 3As shown, the FRP lattice 4 includes an arc-shaped elastic energy dissipation element 41 and a straight elastic energy dissipation element 42, which are disposed in the spatial grid of the FRP lattice 4.

[0051] Furthermore, the arc-shaped elastic energy dissipation element 41 and the straight elastic energy dissipation element 42 are arranged at intervals, that is, a column of grids with arc-shaped elastic energy dissipation element 41 is adjacent to a column of grids with straight elastic energy dissipation element 42. The two are arranged in cooperation with each other, so that the device can absorb the impact force transmitted from the impact shell 6 from multiple directions and angles.

[0052] Specifically, the arc-shaped elastic energy dissipation element 41 is an arc-shaped elastic element with its arc surface facing the impact-resistant shell 6. The arc surface is in contact with the inner wall of the FRP space grid, so that when the device is subjected to an external vertical impact, its impact energy can be conducted to the arc surface of the arc-shaped elastic energy dissipation element 41 first, so that it bends in the direction of impact through the arc surface and absorbs the impact energy.

[0053] Preferably, the arc-shaped elastic energy dissipation element 41 has its arc surface facing the impact-resistant shell 6, with a certain gap between the arc surface and the inner wall of the FRP space grid. Its ends are connected to the corners of the FRP space grid, allowing the impact force parallel to the impact-resistant shell 6 to be transmitted to the ends of the arc-shaped elastic energy dissipation element 41 when the device is impacted from various directions. This causes the two ends of the arc-shaped elastic energy dissipation element 41 to move closer together, increasing the curvature of its arc surface and absorbing impact energy parallel to the impact-resistant shell 6. Furthermore, impact energy perpendicular to the impact-resistant shell 6 can be transmitted to the arc surface of the arc-shaped elastic energy dissipation element 41, causing it to bend in the direction of impact and absorb impact energy from another direction.

[0054] Specifically, the linear elastic energy dissipation element 42 is arranged perpendicular to the outer shell 6, so that when the device is subjected to an external impact, the impact energy can be conducted to the linear elastic energy dissipation element 42, and the impact energy is absorbed by compressing the linear elastic energy dissipation element 42.

[0055] Furthermore, the FRP shell 5 is set on the outer surface of the FRP lattice 4. The FRP shell 5 is also made of FRP. FRP material has good corrosion resistance and strong environmental adaptability, which can prevent the FRP lattice 4 inside from being subjected to environmental corrosion. At the same time, due to the application of FRP material, the segmental assembled bridge pier anti-collision energy dissipation device can be applied to a variety of complex environments, including marine environments.

[0056] Furthermore, the impact-resistant shell 6 is a closed annular shell surrounding the outer wall of the FRP shell 5. The impact-resistant shell 6 is made of steel, has high rigidity, and can directly withstand impact loads.

[0057] It is worth noting that under the direct impact of the impact load, the entire impact-resistant shell 6 will move along the impact direction. The closed ring-shaped impact-resistant shell 6 can transfer the load to the impact-back side, thereby dispersing the large local impact force to the entire FRP lattice 4 inside the impact-resistant shell 6 for energy dissipation, thus consuming the impact energy, reducing local damage on the impact side, dispersing the impact force, and increasing the load-bearing range.

[0058] Furthermore, the outermost layer of the impact-resistant shell 6 is coated with an anti-oxidation and anti-rust coating to achieve corrosion resistance and extend service life.

[0059] Furthermore, it also includes pre-embedded bolts 7 for the anti-collision shell, which are used to connect the anti-collision shell 6 with the FRP lattice 4 and the FRP shell 5. When the segmental pier anti-collision energy dissipation device is damaged under impact load, the anti-collision shell 6 of the segmental pier anti-collision energy dissipation device can be replaced simply by removing the pre-embedded bolts 7. The maintenance is time-saving and the operation is convenient and simple.

[0060] It is worth noting that the segmental assembly bridge pier anti-collision energy dissipation device of the present invention does not involve the pouring of concrete structures, so it is easy to install. Moreover, during the service life, when the bridge is subjected to impact loads that damage the energy dissipation device, it is only necessary to remove the damaged parts of the segmental assembly bridge pier anti-collision energy dissipation device and replace them with new parts. This makes the maintenance process of the entire segmental assembly bridge pier anti-collision energy dissipation device short and simple to operate.

[0061] Compared with existing technologies, the segmental precast pier collision energy dissipation device provided in this embodiment, by sequentially installing shear steel plates 1, FRP lattice 4, FRP shell 5, and collision-resistant shell 6 on the splice joint 9 formed by adjacent precast piers 8, not only has strong shear bearing capacity and can improve the shear performance of the precast assembly interface, but also has energy dissipation performance, which can consume impact energy when the precast pier is subjected to impact load, avoiding or reducing damage. In addition, the energy dissipation device can be replaced after damage, reducing the maintenance time and cost after impact during the bridge's service life.

[0062] Example 2

[0063] Another specific embodiment of the present invention, such as Figures 4-5 As shown, a method for splicing a segmental bridge pier anti-collision energy dissipation device is disclosed, using the segmental bridge pier anti-collision energy dissipation device of Example 1. The specific steps include:

[0064] Step 1: Install the pre-embedded bolts 2;

[0065] Step 11: Before construction, install the pre-embedded bolts 2 inside the precast pier 8;

[0066] First, the pre-embedded bolts 2 are installed in the mold of the precast pier 8 and the pre-embedded bolts 2 are positioned and fixed. Then, the precast pier 8 is poured and processed. After the precast pier 8 is assembled at the pier installation site, the anti-collision energy dissipation device of the precast pier is installed.

[0067] Step 12: Another scenario in Step 1 is to install pre-embedded bolts 2 inside the bridge piers that have been completed and put into use after construction.

[0068] If collision protection is to be provided for existing precast bridges, holes can be drilled on both sides of the existing pier splice joint 9, and then bolts can be embedded through expansion bolts to complete the installation of the pre-embedded bolts 2. Then, the collision energy dissipation device of the precast pier can be installed.

[0069] Step 2: Install individual segmental pier anti-collision energy dissipation devices;

[0070] Step 21: Make pre-drilled holes in the shear steel plate 1 and the FRP lattice 4;

[0071] First connection holes are made at both ends of the shear-resistant steel plate 1, and second connection holes of the same diameter as the first connection holes are made at both ends of the FRP lattice 4. At the same time, the diameter of the embedded bolt 2 is the same as the diameter of the first connection hole and the second connection hole, and the positions of the embedded bolt 2, the first connection hole and the second connection hole are matched and matched with each other.

[0072] Step 22: Install the shear-resistant steel plate 1 and the FRP lattice 4;

[0073] Shear steel plate 1 is installed on two adjacent precast piers 8, so that shear steel plate 1 can span the splice joint 9 of the two precast piers 8. Then, FRP lattice 4 is installed on shear steel plate 1. Shear steel plate connecting nut 3 passes through shear steel plate 1 and FRP lattice 4 at the same time, and works together with pre-embedded bolt 2 to connect shear steel plate 1 and FRP lattice 4 to precast pier 8.

[0074] Step 23: Install the FRP housing 5 and the impact-resistant housing 6;

[0075] Install the FRP shell 5 onto the FRP lattice 4, and then install the impact-resistant shell 6 onto the FRP shell 5 using the impact-resistant shell pre-embedded bolts 7.

[0076] Step 3: Assemble the multiple segmental bridge pier anti-collision energy dissipation devices (hereinafter referred to as anti-collision energy dissipation devices) that were installed in Step 2 together;

[0077] Step 31: Splice the shear steel plates 1 of adjacent anti-collision energy dissipation devices;

[0078] After multiple segmental assembled bridge pier anti-collision energy dissipation devices are placed together, a connection seam will appear between two adjacent segmental assembled bridge pier anti-collision energy dissipation devices. The shear steel plate splicing plate 11 is placed on the shear steel plate 1 of the two adjacent energy dissipation devices, and then the shear steel plate installation bolts 12 are used to pass through the shear steel plate splicing plate 11 and the shear steel plate 1 to connect the shear steel plates 1 of the two adjacent anti-collision energy dissipation devices together.

[0079] Step 32: Assemble the FRP shell 5 of the adjacent anti-collision energy dissipation device;

[0080] Place the FRP shell splicing plate 15 on the FRP shells 5 of two adjacent anti-collision energy dissipation devices, and then use the FRP shell splicing plate mounting bolts 16 to sequentially pass through the FRP shell splicing plate 15 and the FRP shell 5 to splice and connect the FRP shells 5 of the two adjacent anti-collision energy dissipation devices together.

[0081] Step 33: Assemble the impact-resistant outer shell 6 of the adjacent impact-resistant energy dissipation device;

[0082] The anti-collision shell splicing plate 13 is placed on the anti-collision shells 6 of two adjacent anti-collision energy dissipation devices. Then, the anti-collision shell splicing plate mounting bolts 14 are used to sequentially pass through the anti-collision shell splicing plate 13 and the anti-collision shell 6 to splice and connect the anti-collision shells 6 of the two adjacent anti-collision energy dissipation devices together to form a ring structure.

[0083] Step 34: Apply a protective layer;

[0084] Apply protective paint to the entire outer layer of the impact-resistant energy dissipation device to improve its environmental adaptability.

[0085] The segmental assembly bridge pier anti-collision energy dissipation device of this embodiment can be applied to round-ended bridge piers, as well as elliptical bridge piers and other shapes of bridge piers. The anti-collision energy dissipation device can be spliced ​​and adjusted according to the cross-sectional shape of the precast bridge pier, and is not limited to a specific cross-sectional type. The anti-collision energy dissipation device is consistent with the circular cross-section bridge pier anti-collision energy dissipation device in the manufacturing and installation process.

[0086] It is worth noting that, such as Figures 6-7 As shown, another embodiment of the splicing method of the segmental assembly bridge pier anti-collision energy dissipation device of the present invention is to stagger the splicing seams during connection, that is, the connection seams of the shear steel plate 1, the connection seams of the FRP lattice 4, and the connection seams of the anti-collision shell 6 are distributed in a stepped manner, so as to avoid stress concentration and uneven deformation distribution under load caused by concentrated splicing seams, and to better improve the energy dissipation effect.

[0087] When the segmental precast pier splice joint is subjected to an impact load, the impact load first acts on the impact-resistant shell 6. The impact-resistant shell 6 is a steel structure with high rigidity and small deformation. At the same time, the impact-resistant shell 6 after installation is a closed ring structure. The displacement of the impact-resistant shell 6 on the impact side is basically the same as the displacement on the impact-back side. This further ensures that the energy dissipation of the FRP lattice 4 on the impact side is synchronized with that on the impact-back side, avoiding the concentration of damage to the energy-dissipating components and increasing the utilization rate of the energy-dissipating components. After the energy is dissipated by the FRP lattice 4, a small portion of the impact force is then transferred to the closed ring shear plate 1. Through the dispersion and transfer of the impact force by the shear plate 1, the damage concentration of the precast pier splice joint is reduced, making the segmental precast bridge able to withstand a large impact load.

[0088] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A segmental bridge pier anti-collision energy dissipation device, characterized in that, The anti-shear steel plate (1), the FRP lattice (4), the FRP shell (5) and the anti-collision shell (6); The anti-shear steel plate (1) is installed on two adjacent prefabricated bridge piers (8), so that the anti-shear steel plate (1) can span the joint seam (9) between the two prefabricated bridge piers (8), and the side of the anti-shear steel plate (1) away from the prefabricated bridge pier (8) is sequentially provided with the FRP lattice (4), the FRP shell (5) and the anti-collision shell (6); The FRP lattice (4) comprises arc-shaped elastic energy dissipation elements (41) and linear elastic energy dissipation elements (42), and the arc-shaped elastic energy dissipation elements (41) and the linear elastic energy dissipation elements (42) are arranged in the space grid of the FRP lattice (4); one column of grids provided with the arc-shaped elastic energy dissipation elements (41) is adjacent to one column of grids provided with the linear elastic energy dissipation elements (42); The anti-collision shell (6) is a closed annular shell surrounding the outer wall of the FRP shell (5); a plurality of segmental prefabricated bridge pier anti-collision energy dissipation devices are spliced together; after the plurality of segmental prefabricated bridge pier anti-collision energy dissipation devices are placed together, anti-collision energy dissipation device connecting seams appear between adjacent two segmental prefabricated bridge pier anti-collision energy dissipation devices; the anti-shear steel plate splicing plate (11) is placed on the anti-shear steel plates (1) of the adjacent two energy dissipation devices, then the anti-shear steel plate splicing plate installation bolts (12) are used to pass through the anti-shear steel plate splicing plate (11) and the anti-shear steel plate (1), so that the anti-shear steel plates (1) of the adjacent two anti-collision energy dissipation devices are connected together; the FRP shell splicing plate (15) is placed on the FRP shells (5) of the adjacent two anti-collision energy dissipation devices, then the FRP shell splicing plate installation bolts (16) are used to sequentially pass through the FRP shell splicing plate (15) and the FRP shell (5), so that the FRP shells (5) of the adjacent two anti-collision energy dissipation devices are spliced and connected together; the anti-collision shell splicing plate (13) is placed on the anti-collision shells (6) of the adjacent two anti-collision energy dissipation devices, then the anti-collision shell splicing plate installation bolts (14) are used to sequentially pass through the anti-collision shell splicing plate (13) and the anti-collision shell (6), so that the anti-collision shells (6) of the adjacent two anti-collision energy dissipation devices are spliced and connected together, forming an annular structure.

2. A segmental bridge pier impact-resistant energy-dissipating device according to claim 1, characterized in that, Further comprising a pre-buried bolt (2).

3. A segmental bridge pier impact-resistant energy-dissipating device according to claim 2, characterized in that, The pre-buried bolt (2) is arranged at two ends of the prefabricated bridge pier (8).

4. A segmental bridge pier impact-resistant energy-dissipating device according to claim 3, characterized in that, First connection reserved holes are formed at two ends of the anti-shear steel plate (1); second connection reserved holes are formed at two ends of the FRP lattice (4).

5. A segmental bridge pier impact fusing device according to claim 4, wherein The first connection reserved holes and the second connection reserved holes have the same diameter.

6. A segmental bridge pier impact fusing device according to claim 5, wherein The pre-buried bolt (2) can be connected with the anti-shear steel plate (1) and the FRP lattice (4) through the first connection reserved holes and the second connection reserved holes.

7. A segmental bridge pier impact-resistant energy-dissipating device according to claim 6, characterized in that Further comprising an anti-shear steel plate connecting nut (3).

8. A segmental bridge pier impact fusing device according to claim 7, characterized in that, The anti-shear steel plate connecting nut (3) connects the anti-shear steel plate (1) and the FRP lattice (4) with the prefabricated bridge pier (8) through the pre-buried bolt (2).

9. A splicing method of a segmental prefabricated bridge pier anti-collision energy dissipation device, which adopts the segmental prefabricated bridge pier anti-collision energy dissipation device according to any one of claims 1-8, and specific steps comprise: Step 1: installing a pre-buried bolt (2); Step 2: Install single segmental bridge pier anti-collision energy dissipation device; Step 3: Assemble multiple segmental bridge pier anti-collision energy dissipation devices installed in step 2.

10. The segmental assembling pier anti-collision energy dissipation device assembling method according to claim 9, characterized in that, In step 1, before construction, install embedded bolts (2) in the prefabricated bridge pier (8).

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