A bow-shaped self-resetting friction energy dissipation connection coordination device and its construction method

Abstract

The present invention discloses a bow-shaped self-resetting friction energy-absorbing connection coordination device and a construction method thereof, which relates to the technical field of earthquake resistance of beam bridges, and comprises a first body, two second bodies and two third bodies; the first body comprises a bottom connecting plate, a central column and a horizontal connecting rod, the bottom surface of the central column is fixedly connected to the bottom connecting plate, the bottom connecting plate is fixed to the top of the pier, and the two side surfaces of the central column are fixedly connected to the two horizontal connecting rods; the two second bodies are respectively slidably mounted on the two horizontal connecting rods; the two third bodies are also respectively slidably mounted on the two horizontal connecting rods, and are arranged on one side of the second body; the two second bodies are both provided with friction slides, and the horizontal connecting rods are passed through the friction slides; the third body comprises a third body top connecting plate, a rigid vertical plate, a bow arm and an elastic cable; the "double insurance" energy-absorbing measure of the present invention ensures that the bridge does not suffer major damage, and under the pre-tensioning action of the bow arm, the device has a self-resetting function.

Description

Technical Field

[0001] The present invention relates to the technical field of beam bridge earthquake resistance, and in particular to a bow-shaped self-resetting friction energy-dissipating connection coordination device and a construction method thereof. Background Art

[0002] Continuous beam bridges are widely used in railway, highway, and municipal engineering projects due to their simple structure and mature construction techniques. To prevent excessive internal forces from concrete shrinkage and temperature-induced deformation, continuous beam bridges typically have only one fixed pier per bridge. During an earthquake, the seismic response of the superstructure is essentially borne entirely by a single fixed pier, causing significant plastic deformation and longitudinal displacement of the superstructure. This can damage expansion joints and sliding bearings and can also lead to severe damage such as beam collapse.

[0003] To improve the seismic performance of continuous beam bridges, seismic reduction and isolation bearings and viscous dampers are usually used in continuous beam bridges to reduce the seismic response of fixed piers. However, the current conventional solutions do not change the situation in which the fixed piers of continuous beam bridges bear the longitudinal seismic load alone, and the existing seismic capacity of other movable piers is not fully utilized. In recent years, some scholars have proposed lock-up devices. From a technical point of view, it can achieve coordinated force bearing of each pier. However, such devices are not only expensive and complex in structure, but also require complicated inspection and maintenance in the later stage, with high operating and maintenance costs, and basically do not have the self-reset function. Therefore, their application in bridge seismic resistance is also subject to certain limitations. Summary of the Invention

[0004] The present invention aims to provide a bow-shaped, self-resetting frictional energy-dissipating connection coordination device and its construction method. This device can achieve the goal of coordinated force distribution among the piers of a continuous beam bridge, dissipating and absorbing some of the seismic energy, and providing a "double insurance" measure to prevent significant bridge damage. Furthermore, it addresses the issues of conventional energy-dissipating connection devices, such as slow installation, difficult maintenance, and a lack of self-resetting functionality, thereby providing a new approach and technical support for bridge seismic design.

[0005] To achieve its purpose, the present invention adopts the following technical solutions:

[0006] A bow-shaped self-resetting friction energy dissipation connection coordination device comprises a first body, two second bodies and two third bodies;

[0007] The first body includes a bottom connecting plate, a central column, and horizontal connecting rods. The bottom surface of the central column is fixedly connected to the bottom connecting plate, the bottom connecting plate is fixedly connected to the top of the pier, and the two side surfaces of the central column are respectively fixedly connected to the two horizontal connecting rods.

[0008] The two second bodies are respectively slidably mounted on the two horizontal connecting rods;

[0009] The two third bodies are also slidably mounted on the two horizontal connecting rods, and are arranged on one side of the second body;

[0010] The two second bodies are each provided with a friction slideway, and the two horizontal connecting rods are respectively passed through the friction slideway;

[0011] The third body comprises a third body top connecting plate, a rigid vertical plate, an arched arm and an elastic cable;

[0012] The third body top connecting plate is fixedly connected to the bridge beam, the rigid vertical plate and the third body top connecting plate are fixedly connected, an opening is provided in the center of the bow arm, a guide slide is provided at the position of the opening, the horizontal connecting rod is passed through the guide slide, and the horizontal connecting rod can slide along the axial direction of the horizontal connecting rod through the guide slide on the bow arm; the rigid vertical plates are provided at both ends of the bow arm, and the limiting devices are connected to the two ends of the bow arm, and the limiting devices can slide on the rigid vertical plates; the elastic cable is fixedly connected between the two limiting devices, and an oblong hole is provided on the horizontal connecting rod, and the elastic cable is passed through the oblong hole.

[0013] Preferably, the second body includes a second body top connecting plate, an upper clamping block, a lower clamping block and connecting bolts. The second body top connecting plate is fixedly connected to the bridge beam body, the upper clamping block is fixedly connected to the second body top connecting plate, and half of the friction slide is provided on the upper clamping block, and the other half of the friction slide is provided on the lower clamping block. Bolt holes are provided at corresponding positions of the upper clamping block and the lower clamping block, and the two are connected by the connecting bolts. The friction force between the friction slide and the horizontal connecting rod is adjusted by the connecting bolts.

[0014] Preferably, the limiting device includes an end plate and a fixed card plate, an opening is set on the rigid vertical plate, the end of the bow arm is passed through the opening, and is fixedly connected to the end plate and the fixed card plate, the distance between the end plate and the fixed card plate is consistent with the thickness of the rigid vertical plate, and the size of the end plate and the fixed card plate is larger than the opening size of the rigid vertical plate, so that the end of the bow arm is stuck in the opening and can slide at the opening.

[0015] The present invention also provides a construction method of a bow-shaped self-resetting friction energy dissipation connection coordination device, comprising the following steps:

[0016] S1. Before pouring concrete on the bridge beam, the embedded structures of the second and third bodies are installed in the designated design positions by laying out and embedding them according to actual use requirements.

[0017] S2. Before pouring concrete on the top of the bridge pier, the embedded structure of the first body is installed in the designated design position by laying out and embedding;

[0018] S3. After the main structure of the bridge is constructed, the first body, the second body and the third body are respectively installed on their respective embedded parts, and pre-tension is applied to the bow arm in the third body.

[0019] By adopting the technical solution of the above-mentioned method of use, the beneficial effects of the present invention are:

[0020] 1. The bow-shaped self-resetting friction energy-dissipating connection coordination device dissipates and absorbs part of the seismic energy through the mutual friction between the horizontal connecting rod on the first body and the second body. In addition, the deformation of the bow-shaped arm and the elastic cable can also dissipate and absorb part of the seismic energy. This "double insurance" energy dissipation measure ensures that the bridge does not suffer major damage.

[0021] 2. After an earthquake occurs, under the pre-tension of the bow-shaped arm, the bow-shaped self-resetting friction energy dissipation connection coordination device has the function of self-resetting;

[0022] 3. The bow-shaped self-resetting friction energy dissipation connection coordination device is prefabricated in the factory. The on-site installation steps are simple and quick. After the components arrive at the site, they can be quickly assembled. In addition, after an earthquake occurs, the damaged corresponding modules can be quickly replaced according to the actual situation to achieve rapid repair and safety protection in emergency situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and accompanying drawings.

[0024] Figure 1 This is the main view of the present embodiment;

[0025] Figure 2 is a side view of this embodiment;

[0026] Figure 3 is a top view of this embodiment;

[0027] Figure 4 This is a partial exploded view of this embodiment;

[0028] Figure 5 Schematic diagram of the overall structure of this embodiment;

[0029] Figure 6 This is a front view of the embodiment when installed on a bridge beam and a pier;

[0030] Figure 7 This is a side view of this embodiment when installed on the bridge beam and pier.

[0031] In the picture:

[0032] 1- bottom connecting plate; 2- center column; 3- horizontal connecting rod; 4- top connecting plate of second body; 5- upper clamping block; 6- friction slide; 7- lower clamping block; 8- connecting bolt; 9- rigid vertical plate; 10- end plate; 11- fixed clamping plate; 12- bow arm; 13- elastic cable; 14- top connecting plate of third body; 15- guide slide; 16- pier; 17- support; 18- bridge beam; A- first body; B- second body; C- third body. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention, which, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention. However, the present invention is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to facilitate a comprehensive understanding of the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for the sake of clarity and brevity, descriptions of known functions and structures have been omitted.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0035] like Figure 1-7 The present embodiment shows a bow-shaped self-resetting friction energy-absorbing connection coordination device, comprising a first body A, two second bodies B and two third bodies C; the first body A comprises a bottom connecting plate 1, a central column 2 and a horizontal connecting rod 3, the bottom surface of the central column 2 is fixedly connected to the bottom connecting plate 1, the bottom connecting plate 1 is fixedly connected to the top of the pier 16, and the two side surfaces of the central column 2 are respectively fixedly connected to the two horizontal connecting rods 3; the two second bodies B are respectively slidably mounted on the two horizontal connecting rods 3; the two third bodies C are also respectively slidably mounted on the two horizontal connecting rods 3 and are arranged on one side of the second body B; the two second bodies B are each provided with a friction slide 6, and the two horizontal connecting rods 3 are respectively passed through the friction slide 6; the third body C comprises a Three-body top connecting plate 14, rigid vertical plate 9, bow arm 12 and elastic cable 13; the third body top connecting plate 14 is fixedly connected to the bridge beam 18, the rigid vertical plate 9 and the third body top connecting plate 14 are fixedly connected, an opening is provided in the center of the bow arm 12, a guide slide 15 is provided at the position of the opening, the horizontal connecting rod 3 is passed through the guide slide 15, and the horizontal connecting rod 3 can slide along the axial direction of the horizontal connecting rod 3 through the guide slide 15 on the bow arm 12; rigid vertical plates 9 are provided at both ends of the bow arm 12, and limiting devices are connected to both ends of the bow arm 12, and the limiting device can slide on the rigid vertical plate 9; the elastic cable 13 is fixedly connected between the two limiting devices, and an oblong hole is provided on the horizontal connecting rod 3, and the elastic cable 13 is passed through the oblong hole.

[0036] Furthermore, the second body B includes a second body top connecting plate 4, an upper clamping block 5, a lower clamping block 7 and a connecting bolt 8. The second body top connecting plate 4 is fixedly connected to the bridge beam 18, the upper clamping block 5 is fixedly connected to the second body top connecting plate 4, and half of the friction slide 6 is set on the upper clamping block 5, and the other half of the friction slide 6 is set on the lower clamping block 7. Bolt holes are set at corresponding positions of the upper clamping block 5 and the lower clamping block 7. The two are connected by a connecting bolt 8, and the friction force between the friction slide 6 and the horizontal connecting rod 3 is adjusted by the connecting bolt 8.

[0037] Furthermore, the limiting device includes an end plate 10 and a fixed card plate 11. An opening is set on the rigid vertical plate 9. The end of the bow arm 12 is passed through the opening and is fixedly connected to the end plate 10 and the fixed card plate 11. The distance between the end plate 10 and the fixed card plate 11 is consistent with the thickness of the rigid vertical plate 9. The size of the end plate 10 and the fixed card plate 11 is larger than the opening size of the rigid vertical plate 9, so that the end of the bow arm 12 is stuck in the opening and can slide at the opening.

[0038] Specifically, the present invention is installed between two supports 17, and the horizontal connecting rod 3, the elastic cable 13 and the bow arm 12 work together to connect the movable pier and the bridge beam 18, so as to achieve the goal of coordinated force between the movable piers and the fixed piers of the continuous beam bridge, reduce the seismic response of the fixed piers, and improve the seismic performance of the continuous beam bridge;

[0039] Under normal conditions, under normal temperature load and vehicle load conditions, it meets the small deformation requirements under normal use conditions;

[0040] Under the design earthquake, the bow-shaped self-resetting friction energy-absorbing connection coordination device absorbs some of the seismic energy through the mutual friction between the horizontal link 3 on the first body A and the second body B. In addition, the deformation of the pre-tensioned bow arm 12 and the elastic cable 13 also consumes and absorbs some of the seismic energy. This "double insurance" measure ensures that the bridge will not suffer major damage. Under the action of a strong earthquake, the elastic cable 13 will yield, ensuring that the fixed piers will not suffer major damage while protecting the movable piers and ensuring that the movable piers will not suffer major damage.

[0041] After the design earthquake occurs, the bow-shaped self-resetting friction energy dissipation connection coordination device will have the function of self-resetting under the pre-tension of the bow-shaped arm 12. In addition, according to the damage of the bow-shaped self-resetting friction energy dissipation connection coordination device, the corresponding part can be replaced to achieve the function of rapid repair in an emergency;

[0042] When the bridge beam 18 needs a top beam, the first body A, the second body B and the third body C can be removed and operations can be performed at the spatial position of the bow-shaped self-resetting friction energy-absorbing connection coordination device.

[0043] 1) Under the design earthquake, the third body deforms and the bridge beam and the movable pier are locked, that is,

[0044] F=2F t +2F f +2F p (1)

[0045] 2) Under earthquake conditions, in order to protect the capacity of the movable pier, the control conditions are:

[0046] α·(2F ty +2F f +2F p )≤Q max (2)

[0047] α·(2F ty +2F f +2F p )·h≤M max (3)

[0048] 3) To protect the fixed support

[0049] Δ≤Δ b (4)

[0050] in

[0051] F t —longitudinal horizontal force provided by the third body, kN;

[0052] F f —Friction force between the friction slide and the horizontal connecting rod, kN;

[0053] F p —Longitudinal horizontal force provided by the pre-tension of the bow arm, kN;

[0054] α—safety factor, ranging from 1.2 to 2.0;

[0055] F ty —The longitudinal horizontal force provided by the third body when the elastic cable yields, in kN;

[0056] h—fixed pier height, m;

[0057] Q max — is the shear capacity of the movable pier, kN;

[0058] M max — is the bending capacity of the movable pier, kN.m;

[0059] k—safety factor, ranging from 1.5 to 2.0;

[0060] Δ b—Permissible horizontal deformation of fixed supports, m.

[0061] This embodiment also provides a construction method of a bow-shaped self-resetting friction energy dissipation connection coordination device, comprising the following steps:

[0062] S1. Before pouring concrete on the bridge beam 18, the embedded structures of the second body B and the third body C are installed in the designated design positions by laying out and embedding them according to actual use requirements;

[0063] S2. Before pouring concrete on the top of bridge pier 16, the embedded structure of the first body A is installed to the designated design position by laying out and embedding;

[0064] S3. After the main structure of the bridge is constructed, the first body A, the second body B and the third body C are respectively installed on their respective embedded parts, and pre-tension is applied to the bow arm 12 in the third body C.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0066] In the description of this application, it should be understood that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0067] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0068] The specific embodiments described herein are merely illustrative of the spirit of the present application. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A bow-shaped self-resetting friction energy dissipation connection coordination device, characterized in that: It includes a first body (A), two second bodies (B) and two third bodies (C); The first body (A) comprises a bottom connecting plate (1), a central column (2) and a horizontal connecting rod (3); the bottom surface of the central column (2) is fixedly connected to the bottom connecting plate (1); the bottom connecting plate (1) is fixedly connected to the top of the pier (16); and the two side surfaces of the central column (2) are respectively fixedly connected to the two horizontal connecting rods (3); The two second bodies (B) are respectively slidably mounted on the two horizontal connecting rods (3); The two third bodies (C) are also slidably mounted on the two horizontal connecting rods (3) and are arranged on one side of the second body (B); The two second bodies (B) are each provided with a friction slideway (6), and the two horizontal connecting rods (3) are respectively passed through the friction slideway (6); The third body (C) comprises a third body top connecting plate (14), a rigid vertical plate (9), an arched arm (12) and an elastic cable (13); The third body top connecting plate (14) is fixedly connected to the bridge beam (18), the rigid vertical plate (9) and the third body top connecting plate (14) are fixedly connected, an opening is provided at the center of the bow arm (12), a guide slide (15) is provided at the position of the opening, the horizontal connecting rod (3) is passed through the guide slide (15), and the horizontal connecting rod (3) slides along the axial direction of the horizontal connecting rod (3) through the guide slide (15) on the bow arm (12); the rigid vertical plates (9) are provided at both ends of the bow arm (12), and the two ends of the bow arm (12) are connected to limiting devices, and the limiting devices can slide on the rigid vertical plates (9); the elastic cable (13) is fixedly connected between the two limiting devices, and an oblong hole is provided on the horizontal connecting rod (3), and the elastic cable (13) is passed through the oblong hole; The second body (B) comprises a second body top connecting plate (4), an upper clamping block (5), a lower clamping block (7) and a connecting bolt (8); the second body top connecting plate (4) is fixedly connected to the bridge beam (18); the upper clamping block (5) is fixedly connected to the second body top connecting plate (4); half of the friction slideway (6) is provided on the upper clamping block (5); the other half of the friction slideway (6) is provided on the lower clamping block (7); bolt holes are provided at positions corresponding to each other on the upper clamping block (5) and the lower clamping block (7); the two are connected by the connecting bolt (8); and the friction force between the friction slideway (6) and the horizontal connecting rod (3) is adjusted by the connecting bolt (8).

2. A bow-shaped self-resetting friction energy dissipation connection coordination device according to claim 1, characterized in that: The limiting device includes an end plate (10) and a fixed card plate (11); an opening is provided on the rigid vertical plate (9); the end of the bow arm (12) is passed through the opening and is fixedly connected to the end plate (10) and the fixed card plate (11); the distance between the end plate (10) and the fixed card plate (11) is consistent with the thickness of the rigid vertical plate (9); the size of the end plate (10) and the fixed card plate (11) is larger than the opening size of the rigid vertical plate (9), so that the end of the bow arm (12) is stuck in the opening and can slide at the opening.

3. The construction method of a bow-shaped self-resetting friction energy dissipation connection coordination device according to claim 2 is characterized in that: The following steps are involved: S1. According to actual use requirements, before pouring concrete on the bridge beam (18), the embedded structures of the second body (B) and the third body (C) are installed to the designated design positions by laying out and embedding; S2. Before pouring concrete on the top of the bridge pier (16), the embedded structure of the first body (A) is installed to the designated design position by laying out and embedding; S3. After the main structure of the bridge is constructed, the first body (A), the second body (B) and the third body (C) are respectively installed on their respective embedded parts, and pre-tension is applied to the bow arm (12) in the third body (C).

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