Anti-falling beam embedded steel component for bridge construction and detection method thereof

Abstract

The application belongs to the technical field of anti-falling beam, and particularly relates to an anti-falling beam embedded steel component for bridge construction and a detection method thereof. The anti-falling beam embedded steel component for bridge construction is arranged on a horizontal pile cap of a pier. The embedded steel component comprises a pull rod and symmetrical recoverable self-destruction components arranged at two ends of the pull rod. The two ends of the pull rod respectively pass through a transverse partition plate of an upper beam body and a transverse partition plate of a lower beam body. A buffer end of the recoverable self-destruction component is connected with the pull rod and abuts against a surface of the transverse partition plate. A fixed end of the recoverable self-destruction component is fixedly connected with the horizontal pile cap. The recoverable self-destruction components are additionally arranged at the two ends of the pull rod. When the beam body has a displacement trend, the elastic deformation of the recoverable self-destruction components absorbs impact energy, and the displacement of the beam body is resisted, thereby achieving the effect of preventing the beam from falling.

Description

Technical Field

[0001] This invention belongs to the field of anti-falling beam technology, specifically relating to a pre-embedded steel component for anti-falling beams used in bridge construction and its testing method. Background Technology

[0002] During earthquakes or extreme disasters, excessive relative displacement between the bridge beam and the piers can easily occur. Without measures to prevent the beam from falling, this could lead to a major safety accident, causing not only traffic disruptions but also casualties and huge economic losses.

[0003] Currently, the commonly used anti-beam-falling measures in bridge engineering mainly rely on traditional pre-embedded steel components. These components primarily utilize the high strength characteristics of rigid tie rods and other steel components to create rigid constraints on the beam, thereby limiting beam displacement.

[0004] However, the deformation of existing steel components is mostly uncontrollable plastic deformation. If slight deformation occurs and the components cannot be reset, the components will be in a state of stress concentration for a long time, reducing the overall load-bearing capacity. When the deformation exceeds the limit, the components will fail directly and are difficult to replace, requiring large-scale dismantling and repair of the bridge, which is costly and time-consuming. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a pre-embedded steel component for anti-fall beams in bridge construction and its detection method. By adding a recoverable self-destruct component at both ends of the tie rod, when the beam tends to displace, the elastic deformation of the recoverable self-destruct component absorbs the impact energy, resisting the displacement of the beam and achieving the effect of preventing beam fall.

[0006] The specific technical solution adopted in this invention is as follows:

[0007] An embedded steel component for preventing bridge beam collapse is disclosed. The embedded steel component is installed on the horizontal bearing platform of the bridge pier. The embedded steel component includes a tie rod and a recoverable self-destruct component symmetrically arranged at both ends of the tie rod. The two ends of the tie rod pass through the transverse diaphragm of the upper beam and the transverse diaphragm of the lower beam, respectively. The buffer end of the recoverable self-destruct component is connected to the tie rod and abuts against the surface of the transverse diaphragm. The fixed end of the recoverable self-destruct component is fixedly connected to the horizontal bearing platform.

[0008] The recoverable self-destruct component includes a buffer, a deformation rod assembly, and an anti-fall beam block. One end of the buffer is the buffer end of the recoverable self-destruct component and is connected to the tie rod. The other end of the buffer is hinged to the anti-fall beam block via the deformation rod assembly. The deformation rod assembly has the freedom to bend and resists the translation of the diaphragm and forms a buffer by means of its deformation.

[0009] The deformable rod assembly includes a first link and a second link. The end of the buffer is hinged to the anti-fall beam block via the inclined first link. One end of the second link is hinged to the anti-fall beam block, and the other end of the second link is hinged to the middle part of the first link to form a bending node. The first link has the freedom to bend along the bending node by means of the abutment of the second link.

[0010] The deformable rod assemblies are arranged in multiple sets at intervals along the direction of movement perpendicular to the transverse diaphragm.

[0011] The anti-fall beam block includes a fixed base and a long baffle and a short baffle set on the fixed base. The fixed base is the fixed end of the recoverable self-destruct component. The fixed base is fixedly connected to the horizontal support platform by means of fixing bolts. A connecting plate is vertically arranged between the long baffle and the short baffle. The connecting plate is arranged along the moving direction of the transverse partition.

[0012] A method for inspecting embedded steel components of anti-fall beams used in bridge construction, the method comprising the following steps:

[0013] S1. Fix the fixed end of the force-applying device to the horizontal support platform, and fix the force-applying end of the force-applying device to the hinge point of the first connecting rod and the buffer.

[0014] S2. Activate the force application device. The force application end of the force application device pulls the hinge point in the horizontal direction to move away from the buffer. The first link moves away from the buffer with the help of the force application device and forms a bend along the bending node.

[0015] S3. When the first link breaks, record the tension N applied by the force application device at this time. The tension N is the maximum tension that the deformable rod group can withstand.

[0016] The beneficial effects of this invention are:

[0017] 1. In this invention, restorable self-destructing components are added to both ends of the tie rod. When the beam tends to displace, the elastic deformation of the restorable self-destructing components absorbs the impact energy. When the beam's displacement tendency is small, the force on the restorable self-destructing components is small, and the elastic deformation of the restorable self-destructing components will not exceed the limit, thus resisting the beam's displacement and preventing it from falling off. When repairing the beam after displacement, workers can reset the beam. At this time, the restorable self-destructing components reset using their own elastic restoring force, resulting in low maintenance costs and fast recovery. This avoids the problem that traditional components, even when subjected to only slight displacement forces, are prone to irreversible plastic deformation due to rigid constraint characteristics.

[0018] When the beam displacement further increases and exceeds the elastic deformation bearing limit of the recoverable self-destruct component, the recoverable self-destruct component will "self-destruct." However, before self-destruction, the plastic deformation of the deformation rod group will continuously absorb the impact energy, preventing instantaneous failure of the deformation rod group and buffering the beam displacement. This prevents excessive impact force when the beam hits the anti-fall beam block, effectively reducing structural damage such as beam cracking. If the anti-fall beam block also fails to prevent beam displacement, the tie rod will then come into play, providing rigid restraint to the displaced beam.

[0019] 2. In this invention, a multi-layered buffer protection system is formed by a buffer, a deformation rod assembly, and an anti-fall beam block. When the beam tends to displace, the buffer first provides buffering. After the buffer is compressed to its limit, the force is then transmitted to the first connecting rod. The first connecting rod is subjected to external force and undergoes bending deformation. By utilizing the elastic buffering of the buffer and deformation assembly, as well as the interception of the anti-fall beam block, energy is gradually absorbed, significantly reducing the impact speed of the beam. Even if the tie rod constraint is triggered, the force between the beam and the tie rod is more gradual, preventing the tie rod from brittle fracture due to instantaneous overload.

[0020] 3. The present invention also provides a detection method for embedded steel components of anti-fall beams used in bridge construction. Based on the structural design of bending nodes, the stress state of the beam when it is displaced is simulated by a force application device. The force application direction is horizontal and away from the buffer, which can reproduce the stress path of the component when it is actually working.

[0021] The testing process simulates real stress scenarios, ensuring accurate data. Furthermore, the entire testing operation does not require disassembling the embedded steel components, reducing testing costs. If the deformation rod assembly breaks during the testing process, only the deformation rod assembly needs to be replaced, without affecting the normal operation of the bridge. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention when the beam is not moved;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention after the beam has been moved;

[0024] Figure 3 This is a structural schematic diagram of the invention during beam inspection;

[0025] Figure 4 A structural diagram of one side of the long baffle used to prevent beams from falling off;

[0026] In the attached diagram, 1 is the horizontal support platform, 2 is the tie rod, 3 is the beam, 4 is the diaphragm, 5 is the buffer, 6 is the first connecting rod, 7 is the second connecting rod, 8 is the bending node, 9 is the fixed base, 10 is the long baffle, 11 is the short baffle, 12 is the connecting plate, and 13 is the force application device. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0028] like Figure 1-2 As shown, the present invention provides a pre-embedded steel component for preventing bridge falling beams. The pre-embedded steel component is set on the horizontal abutment 1 of the bridge pier. The pre-embedded steel component includes a tie rod 2 and a recoverable self-destructing component symmetrically arranged at both ends of the tie rod 2. The two ends of the tie rod 2 pass through the transverse diaphragm 4 of the upper beam 3 and the transverse diaphragm 4 of the lower beam 3, respectively. The buffer end of the recoverable self-destructing component is connected to the tie rod 2 and abuts against the surface of the transverse diaphragm 4. The fixed end of the recoverable self-destructing component is fixedly connected to the horizontal abutment 1.

[0029] The deformation of existing steel components is mostly uncontrollable plastic deformation. If slight deformation occurs and the components cannot be reset, they will be in a state of stress concentration for a long time, reducing the overall load-bearing capacity. When the deformation exceeds the limit, the components will fail directly and are difficult to replace, requiring large-scale dismantling and repair of the bridge, which is costly and time-consuming.

[0030] Therefore, in this invention, restorable self-destruct components are added to both ends of the tie rod 2. These restorable self-destruct components can provide some resistance to the displacement of the beam 3. When the beam 3 tends to displace, the elastic deformation of the restorable self-destruct components absorbs the impact energy. When the displacement tendency of the beam 3 is small, the force on the restorable self-destruct components is small, and the elastic deformation of the restorable self-destruct components will not exceed the limit. Figure 2 As shown, the displacement of beam 3 was resisted, thus preventing the beam from falling. When repairing beam 3 after displacement, the staff reset beam 3. At this time, the recoverable self-destruct component resets itself with its own elastic restoring force, resulting in low maintenance costs and fast recovery. This avoids the problem that traditional components are prone to irreversible plastic deformation due to rigid constraint characteristics even when subjected to only slight displacement forces.

[0031] When the displacement of beam 3 further increases and exceeds the elastic deformation bearing limit of the recoverable self-destruct component, the recoverable self-destruct component will "self-destruct." However, before self-destruction, the plastic deformation of the deformation rod group will continuously absorb the impact energy, preventing the deformation rod group from failing instantly. This buffers the displacement of beam 3, ensuring that beam 3 does not generate excessive impact force when it hits the anti-fall beam block, effectively reducing structural damage such as cracking of beam 3. If the anti-fall beam block also fails to prevent the displacement of beam 3, then tie rod 2 comes into play and provides rigid restraint to the displaced beam 3.

[0032] The recoverable self-destruct component includes a buffer 5, a deformation rod assembly, and an anti-fall beam block. One end of the buffer 5 is the buffer end of the recoverable self-destruct component and is connected to the pull rod 2. The other end of the buffer 5 is hinged to the anti-fall beam block via the deformation rod assembly. The deformation rod assembly has the freedom to bend and resists the translation of the transverse diaphragm 4 and forms a buffer by means of its deformation.

[0033] A multi-layered buffer protection system is formed by buffer 5, deformation rod assembly, and anti-fall beam stop. When beam 3 tends to displace, buffer 5 first provides buffering, such as... Figure 2 The buffer 5 on the right side is compressed. After the buffer 5 is compressed to its limit, the force is transmitted to the first link 6. The first link 6 is subjected to external force and undergoes bending deformation. By utilizing the elastic buffer of the buffer 5 and the deformation component, as well as the interception of the anti-fall beam block, energy is gradually absorbed, which greatly reduces the impact speed of the beam 3. Even if the tie rod 2 is triggered, the force between the beam 3 and the tie rod 2 is more gradual, preventing the tie rod 2 from brittle fracture due to instantaneous overload.

[0034] The deformable rod assembly includes a first link 6 and a second link 7. The end of the buffer 5 is hinged to the anti-fall beam block via the inclined first link 6. One end of the second link 7 is hinged to the anti-fall beam block, and the other end of the second link 7 is hinged to the middle part of the first link 6 to form a bending node 8. The first link 6 has the freedom to bend along the bending node 8 by means of the abutment of the second link 7.

[0035] The first link 6 is a spring steel plate, and the second link 7 serves to constrain the deformation direction of the first link 6 and provide a support point when the first link 6 needs to break.

[0036] like Figure 1-2 As shown, the deformation linkage adopts a linkage structure of first link 6, second link 7 and bending node 8. The deformation path of first link 6 is limited by bending node 8 to ensure the predictability of the deformation process. At the same time, second link 7 provides support for first link 6 to prevent first link 6 from bending prematurely due to unilateral force. First link 6 only bends gradually along the node when the tensile force reaches the combined bearing limit of second link 7 and first link 6.

[0037] When a bridge undergoes displacement, such as Figure 2As shown, when the displacement direction is towards the right side of the diagram, the first connecting rod 6 on the right bends, and simultaneously, the tie rod 2 undergoes adaptive deformation under its own metallic elasticity. The first connecting rod 6 and tie rod 2 on the left also undergo adaptive deformation. At this time, neither the first connecting rod 6 nor the tie rod 2 is damaged. When the bridge moves again incidentally, and the direction of movement is towards the left side of the diagram, the aforementioned deformation can be reset under the metallic elasticity of the first connecting rod 6 and tie rod 2, that is, the original structural state is "restored," preparing for the next bridge movement. Even if the displacement continues towards the left side of the diagram... Figure 2 In the right-side direction, the first connecting rod 6 and the tie rod 2 continue to deform, or the first connecting rod 6 breaks under the limiting push of the second connecting rod 7, thereby buffering the impact force of the bridge deformation and providing a buffer for the subsequent pulling of the tie rod 2 and the blocking of the anti-falling beam block.

[0038] like Figure 4 As shown, multiple sets of the deformation rods are arranged at intervals along the moving direction perpendicular to the transverse partition 4.

[0039] Multiple sets of deformation rods are connected in parallel to bear the load. The overall bearing capacity is the sum of the single sets of deformation rods. When the displacement force of the beam is large, the multiple sets of deformation rods bend together to absorb energy, preventing the single set of deformation rods from breaking prematurely due to the load exceeding the limit. In addition, if a set of deformation rods fails prematurely due to manufacturing defects or local impact, the remaining sets of deformation rods can still maintain the foundation constraint capacity.

[0040] like Figure 1-2 As shown, the anti-fall beam block includes a fixed base 9 and a long baffle 10 and a short baffle 11 disposed on the fixed base 9. The fixed base 9 is the fixed end of the recoverable self-destruct component. The fixed base 9 is fixedly connected to the horizontal support 1 by means of fixing bolts. A connecting plate 12 is vertically disposed between the long baffle 10 and the short baffle 11. The connecting plate 12 is disposed along the moving direction of the transverse partition 4.

[0041] The fixed base 9 is fixed to the horizontal support 1 by means of pre-embedding and fixing bolts.

[0042] A method for detecting embedded steel components in anti-fall beams used in bridge construction, the method comprising the following steps:

[0043] S1. Fix the fixed end of the force-applying device 13 to the horizontal support 1, and fix the force-applying end of the force-applying device 13 to the hinge point of the first connecting rod 6 and the buffer 5.

[0044] S2. Start the force application device 13. The force application end of the force application device 13 pulls the hinge point in the horizontal direction to move away from the buffer 5. The first link 6 moves away from the buffer 5 with the help of the force application device 13 and forms a bend along the bending node 8.

[0045] S3. When the first connecting rod 6 breaks, record the tension N applied by the force application device 13 at this time. The tension N is the maximum tension that the deformation rod group can withstand.

[0046] like Figure 3 As shown, the detection method in this invention is based on the structural design of the bending node 8. The force application device 13 simulates the stress state of the beam 3 when it is displaced. The force application direction is horizontal and away from the buffer 5 (same as the displacement direction of the beam 3), which can reproduce the force path of the component when it is actually working.

[0047] The testing process simulates real stress scenarios, ensuring accurate data. Furthermore, the entire testing operation does not require disassembling the embedded steel components, reducing testing costs. If the deformation rod assembly breaks during the testing process, only the deformation rod assembly needs to be replaced, without affecting the normal operation of the bridge.

Claims

1. A pre-embedded steel component for preventing bridge collapse during construction, wherein the pre-embedded steel component is installed on the horizontal abutment (1) of the bridge pier, characterized in that, The embedded steel component includes a tie rod (2) and a recoverable self-destruct component symmetrically arranged at both ends of the tie rod (2). The two ends of the tie rod (2) pass through the diaphragm (4) of the upper beam (3) and the diaphragm (4) of the lower beam (3), respectively. The buffer end of the recoverable self-destruct component is connected to the tie rod (2) and abuts against the surface of the diaphragm (4). The fixed end of the recoverable self-destruct component is fixedly connected to the horizontal support (1).

2. The embedded steel component for anti-falling beams in bridge construction according to claim 1, characterized in that, The recoverable self-destruct component includes a buffer (5), a deformation rod group, and a fall-prevention beam block. One end of the buffer (5) is the buffer end of the recoverable self-destruct component and is connected to the pull rod (2). The other end of the buffer (5) is hinged to the fall-prevention beam block by means of the deformation rod group. The deformation rod group has the freedom of bending. The deformation rod group resists the translation of the diaphragm (4) and forms a buffer by means of its deformation.

3. The embedded steel component for anti-falling beams in bridge construction according to claim 2, characterized in that, The deformable rod assembly includes a first link (6) and a second link (7). The end of the buffer (5) is hinged to the anti-fall beam block by means of the inclined first link (6). One end of the second link (7) is hinged to the anti-fall beam block, and the other end of the second link (7) is hinged to the middle part of the first link (6) to form a bending node (8). The first link (6) has the freedom to bend along the bending node (8) by means of the abutment of the second link (7).

4. The embedded steel component for anti-falling beams in bridge construction according to claim 2, characterized in that, The deformation rod group is provided in multiple sets at intervals along the moving direction perpendicular to the transverse diaphragm (4).

5. The embedded steel component for anti-falling beams in bridge construction according to claim 2, characterized in that, The anti-fall beam block includes a fixed base (9) and a long baffle (10) and a short baffle (11) set on the fixed base (9). The fixed base (9) is the fixed end of the recoverable self-destruct component. The fixed base (9) is fixedly connected to the horizontal support (1) by means of fixing bolts. A connecting plate (12) is vertically arranged between the long baffle (10) and the short baffle (11). The connecting plate (12) is arranged along the moving direction of the transverse partition (4).

6. A method for detecting embedded steel components of anti-fall beams used in bridge construction, used to detect the embedded steel components of anti-fall beams used in bridge construction as described in claim 3, characterized in that, The detection method includes the following steps: S1. Fix the fixed end of the force-applying device (13) to the horizontal support (1), and fix the force-applying end of the force-applying device (13) to the hinge point of the first connecting rod (6) and the buffer (5). S2. Start the force application device (13). The force application end of the force application device (13) pulls the hinge point in the horizontal direction to move away from the buffer (5). The first link (6) moves away from the buffer (5) with the help of the force application device (13) and forms a bend along the bending node (8). S3. When the first link (6) breaks, record the tension N applied by the force application device (13) at this time. The tension N is the maximum tension that the deformation rod group can withstand.

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