Anti-beam-falling fixing structure

Abstract

The utility model belongs to the technical field of bridge anti -falling beam device, concretely relates to a kind of anti -falling beam fixing structure.The anti -falling beam fixing structure is installed between beam body and pier, including the fixed plate of section being several Chinese characters, fixed plate is integrally bent into shape, both sides of fixed plate are equipped with positioning side wing, positioning side wing is connected with lower anchor plate by several bolts, the middle part of fixed plate and lower anchor plate form the through cavity for connecting damping element, damping element is connected with upper anchor plate by bolt or by welding positioning;The anti -falling beam fixing structure has the performance of damping buffer and elastic support, with simple and compact structure, convenient to manufacture and install, safe, economic and durable characteristics.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge anti-falling beam devices, specifically relating to an anti-falling beam fixing structure. Background Technology

[0002] While damage to bridge superstructures due to earthquakes is relatively rare, phenomena such as beam collapse, main beam displacement, torsion, and cracking caused by insufficient support length or failure of support connectors are extremely common. Especially in seismically active areas, beam collapse has become one of the most significant forms of earthquake damage to bridges, not only making repairs difficult but also severely hindering rescue and post-disaster reconstruction efforts.

[0003] Anti-fall beam devices are a key structural component for bridge seismic resistance, primarily used to prevent beam collapse accidents caused by excessive relative displacement between the superstructure (beam) and the substructure (pier). Existing anti-fall beam devices exist in various structural styles to accommodate bridge temperature-induced displacement and rotation. For example, rigid blocking devices use concrete blocks or I-beam blocks; these are simple and inexpensive, but offer almost no energy dissipation and are prone to rigid collision damage. Cable-connected devices use prestressed steel strands / chains and high-strength steel rods to provide flexible restraint, but lack multi-directional protection and are prone to stress concentration at the anchorage. Tenon-shaped devices use shock-absorbing tenons and tenon-shaped anti-fall beam structures, utilizing the plastic deformation of steel to dissipate energy, but require replacement after an earthquake, have strict material performance requirements, and are costly to manufacture and use. U-shaped damping devices use U-shaped steel plate dampers; they are easy to install and replace, dissipating energy through the bending deformation of the steel plate, but have limited connection positioning and support strength. Utility Model Content

[0004] The purpose of this utility model is to provide a beam fixing structure that combines damping buffer and elastic support, which is simple and compact in structure, convenient to manufacture and install, and safe, economical and durable in use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A beam-fixing structure for preventing beam fall is installed between a beam and a pier. It is characterized by comprising a fixing plate with a Z-shaped cross-section, the fixing plate being integrally bent, and positioning wings on both sides of the fixing plate. The positioning wings are connected to a lower anchor plate by several bolts or welded for positioning. A through cavity for connecting a damping element is formed between the middle of the fixing plate and the lower anchor plate. The damping element is connected to an upper anchor plate by bolts or welded for positioning.

[0006] Additional technical features constituting the above-mentioned anti-falling beam fixing structure also include: —The damping element is an L-shaped, U-shaped, or rectangular frame, with the lower part of the L-shaped frame bent, the side of the U-shaped frame, or the bottom edge of the rectangular frame placed inside the cavity of the fixing plate; —The positioning side wings on both sides of the fixing plate have corresponding arc-shaped grooves at their ends, which are used to limit the lower part of the damping element; —The inner wall of the cavity in the middle of the fixed plate is provided with a sliding layer made of stainless steel or polytetrafluoroethylene; —The damping element is made of high-strength metal or high-elasticity rubber.

[0007] Compared with the prior art, the anti-fall beam fixing structure provided by this utility model has the following advantages: The anti-fall beam fixing structure forms a cavity for connecting damping elements through a fixing plate with a Z-shaped cross section and a lower anchor plate. After the damping element is connected to the upper anchor plate, an anti-fall beam device with both damping buffer and elastic support performance is formed. Since the fixing plate adopts an integrated bending forming method, the forming structure is optimized, avoiding the stress concentration problem caused by weld seams in traditional welding, improving the stress characteristics of the positioning structure, and improving the fatigue resistance of the device. It has the advantages of high resource utilization, simple and compact structure, convenient manufacturing and installation, safe and reliable use, and economic durability. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a beam fixing structure for preventing beams from falling off, according to this utility model. Figure 2 This is a schematic diagram of the fixing plate structure of the device. Detailed Implementation

[0009] The following detailed description, in conjunction with the accompanying drawings, illustrates the anti-falling beam fixing structure and working principle provided by this utility model. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0010] In the description of this utility model, unless otherwise stated, the terms "upper / lower", "side / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0011] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0012] like Figure 1 As shown, the new anti-fall beam fixing structure includes a fixing plate 1 with a Z-shaped cross section. The fixing plate 1 is integrally bent and formed. Positioning wings 2 are provided on both sides of the fixing plate 1. The positioning wings 2 are connected to the lower anchor plate 41 by several bolts 3. A through cavity 11 for connecting the damping element 5 is formed between the middle of the fixing plate 1 and the lower anchor plate 41. The damping element 5 is connected to the upper anchor plate 42 by bolts or by welding 6 for positioning.

[0013] Its working principle is as follows: The fixed plate 1 of the anti-fall beam fixing structure has a cross section of Z-shape. In order to improve strength and improve stress concentration, it is integrally bent and formed. Positioning wings 2 are provided on both sides, which are connected to the lower anchor plate 41 by several bolts 3. The middle part of the fixed plate 1 and the lower anchor plate 41 form a through cavity 11 for connecting or installing damping element 5. The upper end of the damping element 5 is connected to the upper anchor plate 42 by welding 6 or bolts. The upper and lower anchor plates (42, 41) are connected to the beam body and the pier respectively, thus forming an anti-fall beam structure with elastic support and damping buffer.

[0014] It should be noted that the one-piece molded fixing plate 1 is made by heating and bending metal sheet, resulting in a more uniform overall structure and eliminating the defects of welding seams. This improves the fatigue strength of the fixing plate 1 assembly and makes it safer and more durable.

[0015] In the aforementioned novel anti-falling beam fixing structure —Preferredly, the damping element 5 is an L-shaped frame, with the lower part of the L-shape bent 51, i.e., the horizontal strip is placed in the cavity 11 formed in the middle of the fixed plate 1, which plays a role in hooking and positioning, and can achieve the effect of sliding along the axial direction of the cavity 11 to adapt to the vibration displacement and temperature change displacement of the bridge. Alternatively, a U-shaped frame can be used, which is placed horizontally, with one side placed in the cavity 11 of the fixed plate 1 and the other side connected to the upper anchor plate 42. Or, the bottom edge of the rectangular frame of the damping element 5 is placed in the cavity 11 of the fixed plate 1, i.e. the bottom edge of the rectangular frame passes through the cavity 11 and is fitted and positioned. This rectangular damping structure has better support strength, and the guiding sliding in the cavity 11 has achieved the damping and vibration reduction effect. --like Figure 2As shown, the positioning side wings 2 on both sides of the fixed plate 1 have corresponding arc-shaped grooves 7, which are used to limit the lower part of the damping element 5, so as to avoid excessive displacement of the damping element 5 in the direction perpendicular to the axial direction of the cavity 11, prevent the damping element 5 from detaching from the fixed plate 1, and improve the safety of device operation. — Preferably, the inner wall of the cavity 11 in the middle of the fixed plate 1 is provided with a sliding layer 12 made of stainless steel or polytetrafluoroethylene, so as to realize the mutual sliding between the damping element 5 and the cavity 11, reduce friction damage, improve the relative sliding effect between the two, and enhance the vibration damping and buffering performance. Furthermore, the aforementioned damping element 5 is made of high-strength metal or high-elasticity rubber, possessing excellent strength, toughness, and fatigue resistance, thus extending the working cycle of the anti-falling beam device.

[0016] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A beam-fixing structure for preventing beams from falling, installed between the beam and the pier, characterized in that: The device includes a fixing plate with a Z-shaped cross-section, which is integrally bent and formed. The fixing plate has positioning wings on both sides, which are connected to the lower anchor plate by several bolts or welded for positioning. A through cavity for connecting a damping element is formed between the middle of the fixing plate and the lower anchor plate. The damping element is connected to the upper anchor plate by bolts or welded for positioning.

2. The anti-falling beam fixing structure according to claim 1, characterized in that: The damping element is an L-shaped, U-shaped, or rectangular frame, with the lower part of the L-shape bent, the side of the U-shape, or the bottom edge of the rectangular frame placed inside the cavity of the fixing plate.

3. The anti-falling beam fixing structure according to claim 2, characterized in that: The positioning wing ends on both sides of the fixing plate have corresponding arc-shaped grooves for limiting the lower part of the damping element.

4. The anti-falling beam fixing structure according to claim 2, characterized in that: The inner wall of the cavity in the middle of the fixed plate is provided with a sliding layer made of stainless steel or polytetrafluoroethylene.

5. A beam-fixing structure for preventing beams from falling as described in claim 1 or 2, characterized in that: The damping element is made of high-strength metal or high-elasticity rubber.

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