Double-layer box-shaped steel pier column structure with additional friction energy consumption device

Abstract

The utility model discloses a double-layer box-shaped steel pier column structure with an additional friction energy dissipation device, which comprises a cross beam, bridge piers, a cover beam and the friction energy dissipation device, the bridge piers support the cover beam, the cross beam is arranged between the bridge piers, and the friction energy dissipation device is arranged between the cover beam and the bridge piers and / or between the cross beam and the bridge piers; the friction energy dissipation device comprises lug plates, bolts, constraint steel plates and a friction energy dissipation plate with surface protrusions, the lug plates are symmetrically arranged at the two ends of the friction energy dissipation plate with the surface protrusions, and the constraint steel plates are fixed to the upper face and the lower face of the friction energy dissipation plate with the surface protrusions through the bolts. A reserved space is formed between the constraint steel plate and the friction energy dissipation plate with the surface protrusions, and the friction energy dissipation device is connected with the bent cap and the bridge pier and / or the cross beam and the bridge pier through the lug plates.

Description

Technical Field

[0001] This utility model belongs to the field of bridge seismic resistance, specifically relating to a double-layer box-shaped steel pier structure with an additional friction energy dissipation device. Background Technology

[0002] Box-girder steel bridges are characterized by their lightweight, high strength, short construction period, and suitability for standardized and industrialized production. They are currently mainly used in urban viaducts and expressways, and the steel used is recyclable and reusable, aligning with green development principles. However, in actual earthquakes, box-girder steel bridge piers are prone to localized buckling deformation of the wall panels and cracking at the welded ends, leading to a significant decrease in their seismic performance. With frequent earthquakes, bridge structures, as a crucial component of urban transportation networks, pose a significant challenge to post-earthquake reconstruction if transportation infrastructure cannot be restored promptly, hindering the timely delivery of relief supplies and equipment. Therefore, achieving rapid post-earthquake repair of bridge structures is one of the most pressing issues that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to solve the problem of how to protect the main structure of a bridge from damage or significantly reduce damage during an earthquake, and how to quickly replace it after the earthquake to ensure the normal use of the bridge structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-layer box-shaped steel pier structure with an additional friction energy dissipation device, comprising a crossbeam, a pier, a cap beam, and a friction energy dissipation device. The pier supports the cap beam, the crossbeam is disposed between the piers, and the friction energy dissipation device is disposed between the cap beam and the pier or between the crossbeam and the pier. The friction energy dissipation device includes ear plates, bolts, a restraining steel plate, and a friction energy dissipation plate with raised surfaces. The ear plates are symmetrically disposed at both ends of the friction energy dissipation plate with raised surfaces. The restraining steel plate is fixed to the upper and lower surfaces of the friction energy dissipation plate with raised surfaces by bolts. A reserved space is provided between the restraining steel plate and the friction energy dissipation plate with raised surfaces. The friction energy dissipation device connects the cap beam and the pier and / or the crossbeam and the pier through the ear plates.

[0005] Preferably, the bridge also includes a ground beam, which is disposed at the bottom of the pier, and the friction energy dissipation device is connected between the ground beam and the pier.

[0006] Preferably, a root energy dissipation zone is provided between the ground beam and the pier, and the root energy dissipation zone includes a connecting steel plate and a pin connecting rod.

[0007] Preferably, the connecting steel plate includes an upper steel plate and a lower steel plate, which are respectively disposed at the top and bottom of the root energy dissipation area. The friction energy dissipation device is fixed by connecting the lower surface of the upper steel plate and the lower steel plate through the ear plate.

[0008] Preferably, the lower surface of the upper steel plate and the upper surface of the lower steel plate are connected by welding to the ear plate, and the ear plate is fixedly connected to the friction energy dissipation plate with surface protrusions by a pin connecting rod.

[0009] The present invention has the following beneficial effects: (1) The present invention uses a friction energy dissipation steel plate with surface protrusions as a low yield point steel plate. The friction energy dissipation plate dissipates seismic energy through friction with the track between the outer constraint plate. When under pressure, the energy dissipation plate is constrained by the outer high-strength steel plate. The energy dissipation plate only yields and does not buckle, effectively stimulating the higher-order buckling deformation mode of the low yield point steel plate. (2) The friction energy dissipation device of the present invention serves as the first line of seismic defense for the new double-layer box-shaped steel pier structure. The damaged energy dissipation plate can be quickly replaced, ensuring that the steel pier structure has sufficient safety. (3) Installing the friction energy dissipation device at the location where plastic damage is likely to occur in the double-layer box-shaped steel pier structure effectively improves the energy dissipation capacity of the steel pier structure and enhances the stress performance of the nodes, which is in line with the design concept of "strong nodes and weak components". Attached Figure Description

[0010] 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 on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a three-dimensional structural diagram of the friction energy dissipation device of this utility model.

[0013] Figure 3 This is a side view of the friction energy dissipation device of this utility model.

[0014] Figure 4 This is a schematic diagram of the structure of the energy-consuming region at the root of this utility model.

[0015] In the diagram: 1. Cap beam; 2. Pier; 3. Crossbeam; 4. Friction energy dissipation device; 401. Ear plate; 402. Bolt; 403. Constraint steel plate; 404. Friction energy dissipation plate with raised surface; 405. Reserved space between the constraint steel plate and the friction energy dissipation plate; 5. Root energy dissipation zone; 6. Ground beam; 601. Connecting steel plate; 602. Pin connecting rod. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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.

[0020] 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.

[0021] Example

[0022] The following are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the following embodiments. All technical solutions that fall within the scope of this utility model are protected.

[0023] Reference manual attached Figure 1-4 A double-layer box-shaped steel pier structure with an additional friction energy dissipation device includes a crossbeam 3, a pier 2, a cap beam 1, a ground beam 6, and a friction energy dissipation device 4. The piers support the cap beam 1, the crossbeam 3 is disposed between the piers 2, and the friction energy dissipation device is disposed between the cap beam 1 and the pier 2 and / or between the crossbeam 3 and the pier 2. The friction energy dissipation device 4 includes ear plates 401, bolts 402, restraining steel plates 403, and a friction energy dissipation plate 404 with raised surfaces. The ear plates 401 are symmetrically disposed at both ends of the friction energy dissipation plate 404 with raised surfaces. The restraining steel plates 403 are fixed to the upper and lower surfaces of the friction energy dissipation plate 404 with raised surfaces by bolts 402. A reserved space is provided between the restraining steel plates 403 and the friction energy dissipation plate 404 with raised surfaces. The friction energy dissipation device 4 connects the cap beam and the pier and / or the crossbeam and the pier through the ear plates.

[0024] Reference manual attached Figure 4 The ground beam 6 is located at the bottom of the pier 2, and the friction energy dissipation device 4 is connected between the ground beam 6 and the pier 2. A root energy dissipation zone 5 is provided between the ground beam 6 and the pier, and the root energy dissipation zone 5 includes a connecting steel plate 601 and a pin connecting rod 602. The connecting steel plate includes an upper steel plate and a lower steel plate, which are respectively located at the top and bottom of the root energy dissipation zone. The friction energy dissipation device 4 is fixed by connecting the lower surface of the upper steel plate and the lower steel plate through an ear plate. The lower surface of the upper steel plate and the upper surface of the lower steel plate are connected by welding to the ear plate 401. The ear plate 401 is fixedly connected to the friction energy dissipation plate 404 with surface protrusions through a pin connecting rod.

[0025] The double-layer box-shaped steel pier structure with an additional friction energy dissipation device described in this utility model includes an additional friction energy dissipation device 4, a root energy dissipation zone 5, a crossbeam 3, a cap beam 1, and a pier 2, and each part can be processed in a prefabrication plant. When processing the friction energy dissipation device 4, protrusions need to be provided on the surface of the energy dissipation plate. Their function is to generate friction between the device and the outer high-strength steel plate, i.e., the constraint steel plate 403, under seismic action, thereby dissipating seismic energy. Furthermore, to facilitate friction between the energy dissipation plate and the outer high-strength steel plate, the protrusions of the energy dissipation plate are made into an arc shape, while the high-strength constraint steel plate is designed with an arc-shaped track.

[0026] The friction energy dissipation device 4 is assembled with the pier using a pin connection. This means that during pier fabrication, ear plates and pin holes are pre-installed in areas prone to plastic hinge formation. Because the double-layer box-shaped steel pier structure is prone to significant plastic deformation at the root, friction energy dissipation devices 4 are installed on all four sides of the root. Friction energy dissipation devices are also installed at the connection points between the crossbeams and the piers on both sides, and at the connection points between the cap beams and the steel piers at both ends, thereby improving the seismic resistance of the new double-layer box-shaped steel pier structure.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A double-layer box-shaped steel pier column structure with an additional friction energy dissipation device, characterized in that: It includes a crossbeam, a pier, a cap beam and a friction energy absorption device, wherein the pier supports the cap beam, the crossbeam is arranged between the piers, and the friction energy absorption device is arranged between the cap beam and the pier or between the crossbeam and the pier; the friction energy absorption device includes ear plates, bolts, a restraining steel plate and a friction energy absorption plate with a raised surface, wherein the ear plates are symmetrically arranged at both ends of the friction energy absorption plate with a raised surface, the restraining steel plate is fixed to the upper and lower surfaces of the friction energy absorption plate with a raised surface by bolts, a reserved space is arranged between the restraining steel plate and the friction energy absorption plate with a raised surface, and the friction energy absorption device connects the cap beam and the pier and / or the crossbeam and the pier through the ear plates.

2. The double-layer box-shaped steel pier column structure of the additional friction energy dissipation device according to claim 1 is characterized in that: It also includes a ground beam, which is arranged at the bottom of the pier, and the friction energy dissipation device is connected between the ground beam and the pier.

3. The double-layer box-shaped steel pier column structure of the additional friction energy dissipation device according to claim 2 is characterized in that: A root energy dissipation zone is arranged between the ground beam and the bridge pier, and the root energy dissipation zone includes a connecting steel plate and a pin connecting rod.

4. The double-layer box-shaped steel pier column structure of the additional friction energy dissipation device according to claim 3 is characterized in that: The connecting steel plate comprises an upper steel plate and a lower steel plate, which are respectively arranged at the top and bottom of the root energy dissipation zone. The friction energy dissipation device is fixed by connecting the lower surface of the upper steel plate and the lower steel plate through the ear plate.

5. The double-layer box-shaped steel pier column structure of the additional friction energy dissipation device according to claim 4 is characterized in that: The lower surface of the upper steel plate and the upper surface of the lower steel plate are connected to the ear plate by welding, and the ear plate is fixedly connected to the friction energy-absorbing plate with surface protrusions through a pin connecting rod.

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