Prefabricated assembly type combined pier column connecting structure with external energy dissipation bars
By using a prefabricated assembled composite pier structure with external energy dissipation bars at the pier joints, the problem of unreliable shear key connections was solved, improving the seismic performance and construction convenience of the piers, and achieving enhanced energy dissipation capacity and reliable connection of nodes.
Patent Information
- Application Number
- CN202520361936.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
The existing prefabricated bridge pier connection structure is not reliable under seismic loading, and is prone to rotational misalignment, which can lead to instability of the pier column or even overturning.
The prefabricated assembled composite pier column connection structure with external energy dissipation bars is formed by setting multiple shear keys on the pier cap and assembling them with steel pipes, steel plates, steel mesh and FRP formwork to form a lattice column, and then pouring concrete. Combined with detachable energy dissipation bars and the pier cap, a more reliable connection method is formed.
The rigidity and seismic performance of the bridge piers are improved. The energy dissipation rods, as the first line of defense, fail before the nodes under external forces, thus preventing node damage. The energy dissipation rods can be replaced to enhance energy dissipation capacity, thereby improving the connection reliability and construction convenience of the nodes.
Smart Images
Figure CN223837889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge structure technology, and more specifically, to a prefabricated assembled combined pier column connection structure with an external energy dissipation bar. Background Technology
[0002] Precast concrete bridge piers have the advantages of high construction quality, short construction period and minimal impact on existing traffic facilities, and have become an important development direction for bridge substructures.
[0003] The reliability, ease of construction, and seismic safety of node connections are key technical issues in the prefabrication and assembly of bridge substructures. With rapid societal development, engineering structures are becoming increasingly complex, and the environments they face are becoming more severe, placing higher demands on the strength, stiffness, and other performance aspects of the pier-cap connection. Currently, to facilitate rapid construction of bridge substructures, a convenient and fault-tolerant cap-and-cap connection node structure is commonly used, where the pier column and cap are connected via shear keys.
[0004] However, under the action of an earthquake, the structure is not reliable with only a single shear key connection. Rotation and misalignment can easily occur at the joint, causing instability of the pier column or even overturning. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide a prefabricated assembled combined pier column connection structure with an external energy dissipation rod to solve the above problems.
[0006] The present invention adopts the following solution:
[0007] This application provides a prefabricated assembled composite pier connection structure with an external energy dissipation rod, including a pier cap and a composite pier set on the pier cap, and also including an energy dissipation rod; the pier cap is provided with multiple shear keys; the composite pier includes multiple steel pipes connected to the shear keys, a first steel plate connected to the lower part of the steel pipes and placed at a certain distance above the pier cap, a lattice column formed by connecting a second steel plate between the steel pipes and placed on the first steel plate, a steel mesh surrounding the lattice column and connected to the first steel plate, and an FRP formwork surrounding the steel mesh and placed on the first steel plate; concrete is poured between the FRP formwork and the lattice column, and inside the steel pipes; the energy dissipation rod is detachably connected to the first steel plate and the pier cap.
[0008] Furthermore, the outer dimensions of the shear key are adapted to the inner dimensions of the steel pipe.
[0009] Furthermore, the steel mesh includes a plurality of longitudinal bars and a plurality of stirrups spaced longitudinally outside the longitudinal bars.
[0010] Furthermore, a sleeve is provided on the first steel plate, and bolts are pre-embedded on the bearing platform; the lower end of the longitudinal rib is connected to the sleeve; the energy dissipation rod is detachably connected to the sleeve and the bolt.
[0011] Furthermore, a connecting steel plate is fixedly provided at the lower end of the steel pipe, and a connecting through hole is provided on the connecting steel plate; a bolt rod adapted to connect with the connecting through hole is provided on the bearing platform; and multiple stiffening ribs are provided between the connecting steel plate and the side of the steel pipe.
[0012] Furthermore, a third steel plate is connected to the upper end face of the support platform.
[0013] Furthermore, the concrete is rubber concrete.
[0014] By adopting the above technical solution, the present invention can achieve the following technical effects:
[0015] This utility model provides a prefabricated assembled composite pier connection structure with external energy dissipation bars. It includes a bearing platform and composite piers mounted on the platform. The composite piers are constructed using a lattice structure formed by connecting steel pipes and plates, and then filled with concrete. This structure improves pier rigidity while saving materials. Furthermore, the composite piers are not only connected to the bearing platform via shear keys, but also detachably connected to the bearing platform by multiple energy dissipation bars. This makes the connection between the composite piers and the bearing platform more robust. When the composite pier is subjected to external forces, the external energy dissipation bars act as the first line of defense against energy loss, preventing damage to the connection points before they are destroyed. The energy dissipation bars can then be removed and replaced with new ones, increasing the energy dissipation capacity of the connection points. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a prefabricated assembled combined pier column connection structure with an external energy dissipation bar according to an embodiment of this utility model;
[0018] Figure 2 yes Figure 1 A schematic diagram of the structure without FRP templates installed;
[0019] Figure 3 yes Figure 2 Schematic diagram of the structure without steel reinforcement mesh;
[0020] Figure 4 This is a schematic diagram of the assembly structure of the pier cap portion of a prefabricated assembled combined pier column connection structure with an external energy dissipation rod according to an embodiment of this utility model.
[0021] Figure 5 This is a cross-sectional structural schematic diagram of a prefabricated assembled combined pier column connection structure with an external energy dissipation rod according to an embodiment of this utility model.
[0022] Figure 6 yes Figure 5 A top view of the structure of AA;
[0023] Figure 7 yes Figure 5 A top view of the structure of the middle BB;
[0024] Icons: 1. Foundation, 2. Energy dissipation bar, 3. Shear key, 4. Steel pipe, 5. First steel plate, 6. Second steel plate, 7. Reinforcing mesh, 8. FRP formwork, 9. Concrete, 10. Bolt rod, 11. Third steel plate, 12. Bolt, 13. Sleeve, 14. Stiffening rib, 15. Longitudinal reinforcement, 16. Stirrup, 17. Connecting steel plate. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] Example
[0027] Combination Figures 1 to 7As shown, this embodiment provides a prefabricated assembled composite pier connection structure with an external energy dissipation rod, including a pier cap 1 and a composite pier set on the pier cap 1, and also including an energy dissipation rod 2; the pier cap 1 is provided with multiple shear keys 3; the composite pier includes multiple steel pipes 4 connected to the shear keys 3, a first steel plate 5 connected to the lower part of the steel pipes 4 and placed at a certain distance above the pier cap 1, a lattice column formed by the steel pipes 4 and a second steel plate 6 placed on the first steel plate 5 and connected between them, a steel mesh 7 surrounding the lattice column and connected to the first steel plate 5, and an FRP template 8 surrounding the steel mesh 7 and placed on the first steel plate 5; concrete 9 is poured between the FRP template 8 and the lattice column, and inside the steel pipes 4; the energy dissipation rod 2 is detachably connected to the first steel plate 5 and the pier cap 1.
[0028] Specifically, in this embodiment, such as Figure 4 As shown, a bolt 12 with internal threads, a shear key 3 that matches the inner size of the steel pipe 4, and a bolt rod 10 surrounding the shear key 3 are pre-embedded on the bearing platform 1; a third steel plate 11 is provided on the bearing platform 1, which has a through hole for the bolt 12, the shear key 3 and the energy dissipation rod 2 to pass through.
[0029] In this embodiment, as Figure 2 and Figure 3 As shown, the composite pier includes four circular steel pipes 4, with annular connecting steel plates 17 fixed to the lower ends of the steel pipes 4. The connecting steel plates 17 have connecting through holes. Multiple stiffening ribs 14 are provided between the connecting steel plates 17 and the sides of the steel pipes 4. The shear key 3 is also a circular steel pipe 4, with its outer dimensions matching the inner dimensions of the steel pipes 4. The shear key 3 enables quick positioning and assembly connection. The connecting steel plates 17 and the sides of the steel pipes 4 are reinforced by the stiffening ribs 14 and fixedly connected by bolts 10 on the pier cap 1. This facilitates installation and effectively prevents slippage and rotation at the connection nodes, thereby improving the lateral stiffness at the nodes. A first steel plate 5 is horizontally connected to the steel pipe 4 at a certain height from the foundation 1. Four steel pipes 4 are connected to each other and placed on the first steel plate 5, with a second steel plate 6 connected to them, forming a lattice column structure. A sleeve 13 is provided on the first steel plate 5 around the outer periphery of the lattice column. The steel mesh 7 includes longitudinal bars 15 connected to the sleeve 13 and stirrups 16 spaced apart on the longitudinal bars 15.
[0030] In this embodiment, an FRP formwork 8 is provided around the steel mesh 7, which can improve the corrosion resistance of the column, save materials, be convenient and quick, have high safety, and avoid subsequent formwork removal. Figures 5 to 7As shown, in this embodiment, rubber concrete 9 is poured between the FRP template 8 and the lattice column, and inside the steel pipe 4. The shear key 3, which is a circular steel pipe 4, has the rubber concrete 9 inside it connected to the pier cap 1. This fully utilizes the impact resistance, toughness, and ductility of the rubber concrete 9, giving the composite column a stronger deformation capacity. It should be noted that the FRP template 8 includes the interior of the steel pipe 4. In this embodiment, multiple energy dissipation rods 2 are arranged around the steel pipe 4 and are detachably connected to the sleeve 13 and the bolt 12. This makes the connection between the composite pier column and the pier cap 1 more secure. When the composite pier column is subjected to external force, the external energy dissipation rods 2 act as the first line of energy dissipation defense for the composite pier column, failing before the connection node, effectively preventing the node from being damaged by external force. Then, the energy dissipation rods 2 can be removed and replaced with new ones, increasing the energy dissipation capacity of the node.
[0031] The following describes the construction method of the prefabricated assembled composite pier connection structure of the external energy dissipation rod 2, which includes the following steps:
[0032] First, at the prefabrication plant, steel pipe 4 is connected to connecting steel plate 17, and then connected to second steel plate 6 to form a lattice column. Then, the second steel plate 6 is connected; steel mesh 7 is tied, and FRP formwork 8 is prefabricated.
[0033] At the construction site, the foundation 1 is processed, and shear keys 3, bolts 12 and bolt rods 10 are pre-embedded and connected in appropriate positions; and the third steel plate 11 is connected to its top.
[0034] Then, the lattice column, the steel mesh 7, and the FRP formwork 8 are transported to the construction site. The lattice column is positioned and installed using shear keys 3 and fixed using bolt rods 10. The steel mesh 7 is connected to the sleeve 13. The FRP formwork 8 is fixed to the first steel plate 5. The energy dissipation rod 2 is connected to the sleeve 13 and the bolts 12.
[0035] Finally, concrete 9 is poured between the FRP template 8 and the lattice column, and inside the steel pipe 4.
[0036] As described above, the lattice column, the reinforcing mesh 7, and the FRP formwork 8 are all prefabricated in the prefabrication plant, while the foundation 1 can be fabricated simultaneously on the construction site. Now, it is only necessary to install the prefabricated lattice column, reinforcing mesh 7, FRP formwork 8, and energy-dissipating rod 2 onto the foundation 1, and then pour concrete 9 between the FRP formwork 8 and the lattice column, and inside the steel pipe 4. The prefabricated assembled composite pier column connection structure of the external energy-dissipating rod 2 is a prefabricated assembled structure, which is convenient to construct, requires no subsequent formwork removal, and has high safety.
[0037] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.
[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
Claims
1. A prefabricated assembled combined pier column connection structure with an external energy dissipation bar, comprising a bearing platform and a combined pier column disposed on the bearing platform, characterized in that, It also includes energy-dissipating bars; multiple shear keys are provided on the bearing platform; the combined pier column includes multiple steel pipes connected to the shear keys, a first steel plate connected to the lower part of the steel pipes and placed at a certain distance above the bearing platform, a lattice column formed by connecting the steel pipes and the first steel plate with a second steel plate, a steel mesh surrounding the lattice column and connected to the first steel plate, and an FRP formwork surrounding the steel mesh and placed on the first steel plate; concrete is poured between the FRP formwork and the lattice column, and inside the steel pipes; the energy-dissipating bars are detachably connected to the first steel plate and the bearing platform.
2. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 1, characterized in that, The outer dimensions of the shear key are adapted to the inner dimensions of the steel pipe.
3. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 1, characterized in that, The steel mesh includes multiple longitudinal bars and multiple stirrups spaced longitudinally outside the longitudinal bars.
4. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 3, characterized in that, A sleeve is provided on the first steel plate, and a bolt is pre-embedded on the bearing platform; the lower end of the longitudinal rib is connected to the sleeve; the energy dissipation rod is detachably connected to the sleeve and the bolt.
5. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 4, characterized in that, A connecting steel plate is fixed to the lower end of the steel pipe, and a connecting through hole is provided on the connecting steel plate; a bolt rod adapted to connect with the connecting through hole is provided on the bearing platform; multiple stiffening ribs are provided between the connecting steel plate and the side of the steel pipe.
6. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 1, characterized in that, A third steel plate is connected to the upper end face of the support platform.
7. The prefabricated assembled combined pier column connection structure with external energy dissipation rods according to claim 1, characterized in that, The concrete used is rubber concrete.