Sliding groove type anti-falling beam device
By installing a chute-type anti-falling beam device on the bridge, the sliding structure with connecting chain and locking functions restricts the displacement of the box girder, solving the problem of easy beam fall during earthquakes in small and medium-span bridges, and improving the seismic resistance and safety of the bridge.
Patent Information
- Application Number
- CN202422556131.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Small and medium-span bridges are prone to beam collapse during earthquakes. Existing designs have failed to effectively prevent this and have not considered the effects of crossing faults, resulting in severe economic losses and traffic disruptions.
A sliding anti-falling beam device is designed. By setting a base plate seat and a sliding structure with locking function on the cap beam, the box beam is connected to the sliding structure by a connecting chain, which restricts the displacement of the box beam and prevents it from falling.
It effectively prevents excessive displacement of box girders caused by external or conventional forces, reduces the phenomenon of girder falling, improves the seismic performance of bridges, and reduces the difficulty of post-earthquake repair and economic losses.
Smart Images
Figure CN223496995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge structure, specifically to a chute-type anti-falling beam device. Background Technology
[0002] Located between the Circum-Pacific Seismic Belt and the Eurasian Seismic Belt, my country is one of the most severely affected continental regions globally, characterized by frequent, high-intensity, widely distributed, and shallow-focus earthquakes. Historical investigations into the damage caused by numerous strong earthquakes have revealed that superstructure beam collapse is one of the most common and severe bridge damage modes during strong earthquakes, and beam collapse damage has frequently occurred in many strong earthquakes in my country. Bridge beam collapse during strong earthquakes not only causes severe economic losses but also disrupts vital transportation routes, seriously hindering post-earthquake emergency rescue and disaster relief efforts. Post-earthquake repair is extremely difficult, resulting in significant adverse economic and social impacts. Furthermore, asymmetric permanent ground displacement caused by faults under seismic action can also lead to bridge beam collapse, and the design of most bridges that have experienced beam collapse or collapse did not consider the effects across faults. For example, the Wushi Bridge, which experienced the Jiji earthquake, suffered from insufficient main beam overlap length, and its supports and shear keys or blocks lacked sufficient strength and toughness to resist seismic forces. It also lacked anti-beam collapse devices to prevent beam collapse.
[0003] Currently, small and medium-span bridges account for a very large proportion of bridges in my country. According to statistics from 2022, there are 1.0332 million highway bridges in my country, of which small and medium-span bridges account for 83.7%. Bridge collapse is a major type of seismic damage to these bridges. Based on existing seismic damage experience, even bridges designed according to current domestic seismic design codes can still experience bridge collapse.
[0004] Therefore, we propose a chute-type anti-fall beam device. Summary of the Invention
[0005] To address the aforementioned shortcomings of the existing technology, this utility model provides a grooving-type anti-fall beam device.
[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:
[0007] A chute-type anti-fall beam device includes: a base plate seat, fixedly mounted on the cap beam, the base plate seat including a sliding structure with locking function; and a connecting chain, one end of which is connected to the sliding structure on the base plate seat and the other end of which is connected to the box beam.
[0008] By setting a base plate seat on the cap beam and a sliding structure with locking function on the base plate seat, one end of the connecting chain is connected to the sliding structure and the other end is connected to the box beam, which can limit the box beam and prevent it from displacing excessively due to normal forces or seismic forces. It can limit the maximum displacement of the box beam, thereby achieving the effect of preventing the beam from falling off.
[0009] Further defining the sliding structure, it includes a lower clamping plate, an upper clamping plate, a sliding plate, a connecting bolt, and a friction plate. Two friction plates are provided, one on the lower surface of the upper clamping plate and the other on the upper surface of the lower clamping plate. The sliding plate is located between the two friction plates. The connecting bolt is vertically located in the middle of the sliding plate. A sliding groove is provided on the upper clamping plate along the sliding direction of the falling beam. The width of the sliding groove matches the outer diameter of the connecting bolt. A locking groove is provided on the sliding plate along the sliding direction of the falling beam. A locking bolt is vertically provided on the upper clamping plate, passing through the locking groove and fixed to the lower clamping plate. When the locking bolt is located at one end of the locking groove, the connecting bolt is located in the sliding groove at the end opposite to the locking bolt.
[0010] The sliding plate is clamped in the middle by the lower and upper clamping plates and the friction plate. A sliding groove is opened on the upper clamping plate, and a connecting bolt is installed on the sliding plate. The sliding distance of the connecting bolt is limited by the sliding groove. A locking groove is opened on the sliding plate, and a locking bolt passing through the locking groove is installed on the upper and lower clamping plates. When the locking bolt is located at one end of the locking groove, the connecting bolt is located at the other end of the sliding groove, which can effectively prevent the sliding plate from sliding in the opposite direction. The performance of the anti-fall beam can be adjusted by adjusting the frictional resistance between the upper and lower clamping plates and the sliding plate.
[0011] Further specified, a fixing plate is fixedly provided at the bottom of the lower clamping plate, and the bottom plate seat is fixed to the cap beam through the fixing plate.
[0012] Furthermore, connecting rings are provided on both the connecting bolts and the box girder, and the two ends of the connecting chain are respectively connected to the two connecting rings; by setting two connecting rings to fix the two ends of the connecting chain respectively, the connection is more convenient.
[0013] Further specified, the base plate is placed on the transverse seismic blocks at both ends of the cap beam, and the connecting ring on the box girder is fixed on the support steel plate of the box girder.
[0014] Further specified, the base plate is located on the horizontal plane of the cap beam and inside the support system on the cap beam, and the connecting ring on the box beam is located on the bottom surface of the box beam through an mounting plate.
[0015] The beneficial effects of this utility model are as follows: by setting a sliding structure with locking function and connecting the sliding structure and the box girder with a connecting chain, the box girder can be restricted when it is displaced by external force or conventional force, thus preventing the girder from falling off. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the installation status of Example 1;
[0017] Figure 2 This is a schematic diagram of the installation status of Example 2;
[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the base plate.
[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the base plate without the upper clamping plate installed.
[0020] The symbols for each component are as follows:
[0021] 1. Base plate, 11. Lower clamping plate, 12. Upper clamping plate, 13. Sliding plate, 14. Connecting bolt, 141. Locking groove, 15. Sliding groove, 16. Locking bolt, 17. Fixing plate, 18. Friction plate, 2. Connecting chain, 3. Cap beam, 4. Box beam, 5. Support system. Detailed Implementation
[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.
[0023] Example 1:
[0024] like Figure 1 , Figure 3 and Figure 4 As shown, a sliding anti-fall beam device includes a base plate 1 and a connecting chain 2. The base plate 1 is fixedly mounted on the cap beam 3. The base plate 1 includes a sliding structure with a locking function. The sliding structure includes a lower clamping plate 11, an upper clamping plate 12, a sliding plate 13, a connecting bolt 14, and a friction plate 18. Two friction plates 18 are provided, respectively located on the lower surface of the upper clamping plate 12 and the upper surface of the lower clamping plate 11. The sliding plate 13 is located between the two friction plates 18. The connecting bolt 14 is vertically located in the middle of the sliding plate 13 and welded to the sliding plate 13. A sliding groove 15 is provided on the upper clamping plate 12 along the falling beam sliding direction. The width of the sliding groove 15 matches the outer diameter of the connecting bolt 14. A locking groove 141 is provided along the sliding direction of the lower beam 3. A locking bolt 16 is provided vertically on the upper clamping plate 12, passing through the locking groove 141 and fixed on the lower clamping plate 11. When the locking bolt 16 is located at one end of the locking groove 141, the connecting bolt 14 is located in the sliding groove 15 at the end opposite to the locking bolt 16. A fixing plate 17 is fixedly provided at the bottom of the lower clamping plate 11, and the bottom plate seat 1 is fixed to the cap beam 3 through the fixing plate 17. Connecting rings are provided on the connecting bolt 14 and the box beam 4. The two ends of the connecting chain 2 are respectively connected to the two connecting rings. The bottom plate seat 1 is provided on the transverse seismic blocks at both ends of the cap beam 3, and the connecting rings on the box beam 4 are fixed on the support steel plate of the box beam 4.
[0025] By setting a base plate seat 1 on the cap beam 3, and setting a sliding structure with locking function on the base plate seat 1, one end of the connecting chain 2 is connected to the sliding structure, and the other end is connected to the box beam 4. This can limit the box beam 4 and prevent it from displacing excessively due to normal forces or seismic forces. It can limit the maximum displacement of the box beam 4, thereby achieving the effect of preventing the beam from falling off. The sliding plate 13 is clamped in the middle by the lower clamping plate 11, the upper clamping plate 12, and the friction plate 18. A sliding groove 15 is opened on the upper clamping plate 12, and a connecting bolt 14 is set on the sliding plate 13. The sliding groove 15 is used to lock the box beam 4. The sliding distance of the connecting bolt 14 is limited, and a locking groove 141 is opened on the sliding plate 13. Locking bolts 16 passing through the locking groove 141 are provided on the upper clamping plate 12 and the lower clamping plate 11. When the locking bolt 16 is located at one end of the locking groove 141, the connecting bolt 14 is located at the other end of the sliding groove 15, which can effectively prevent the sliding plate 13 from sliding in the opposite direction. The performance of the anti-fall beam can be adjusted by adjusting the frictional resistance between the upper clamping plate 12, the lower clamping plate 11 and the sliding plate 13. The connection is more convenient by setting two connecting rings to be fixedly connected to both ends of the connecting chain 2.
[0026] Example 2:
[0027] like Figures 2-4 As shown, the difference between Embodiment 2 and Embodiment 1 is only that the base plate seat 1 is located on the horizontal plane of the cap beam 3 and inside the support system 5 on the cap beam 3, and the connecting ring on the box beam 4 is located on the bottom surface of the box beam 4 through an mounting plate.
Claims
1. A chute-type anti-fall beam device, characterized in that, include: The base plate seat (1) is fixedly mounted on the cover beam (3), and the base plate seat (1) includes a sliding structure with locking function; The sliding structure includes a lower clamping plate (11), an upper clamping plate (12), a sliding plate (13), a connecting bolt (14), and a friction plate (18). Two friction plates (18) are provided, one on the lower surface of the upper clamping plate (12) and the other on the upper surface of the lower clamping plate (11). The sliding plate (13) is located between the two friction plates (18). The connecting bolt (14) is vertically positioned in the middle of the sliding plate (13). A sliding groove (15) is provided on the upper clamping plate (12) along the sliding direction of the beam. The width of the sliding groove (15) matches the outer diameter of the connecting bolt (14). The sliding plate (13) is provided with a locking groove (141) along the sliding direction of the drop beam. The upper clamping plate (12) is provided with a locking bolt (16) that passes through the locking groove (141) and is fixed on the lower clamping plate (11). When the locking bolt (16) is located at one end of the locking groove (141), the connecting bolt (14) is located at the end of the sliding groove (15) opposite to the locking bolt (16). The connecting chain (2) is connected at one end to the sliding structure on the base plate seat (1) and at the other end to the box girder (4).
2. The chute-type anti-fall beam device according to claim 1, characterized in that, A fixing plate (17) is fixedly provided at the bottom of the lower clamping plate (11), and the bottom plate seat (1) is fixed on the cover beam (3) through the fixing plate (17).
3. The chute-type anti-fall beam device according to claim 2, characterized in that, Both the connecting bolt (14) and the box girder (4) are provided with connecting rings, and the two ends of the connecting chain (2) are respectively connected to the two connecting rings.
4. The chute-type anti-fall beam device according to claim 3, characterized in that, The base plate seat (1) is located on the transverse seismic blocks at both ends of the cap beam (3), and the connecting ring on the box beam (4) is fixed on the support steel plate of the box beam (4).
5. The chute-type anti-fall beam device according to claim 3, characterized in that, The base plate seat (1) is located on the horizontal plane of the cap beam (3) and inside the support system (5) on the cap beam (3). The connecting ring on the box beam (4) is located on the bottom surface of the box beam (4) through an mounting plate.