A metal shock-absorbing damper connection structure
By introducing a moving gap into the bridge damper connection structure, the problems of metal dampers are easily corroded and temperature deformation are solved, effective control of durability and seismic response is achieved, and the risk of bridge falling beams is reduced.
Patent Information
- Application Number
- CN202310781202.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-29
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2043-06-29
AI Technical Summary
Existing metal dampers are prone to deterioration of mechanical properties due to corrosion in bridge structures and cannot meet the requirements of long-term service. At the same time, the expansion and contraction deformation problems caused by temperature changes caused by large bridge spans have not been effectively solved, affecting the normal use of the dampers.
A metal shock absorber connection structure is designed, including a shoe steel plate assembly, a column assembly and a metal damper energy-consuming assembly. By connecting angle steel on both sides of the second vertical plate of the column assembly and providing a movable gap, it adapts to the telescopic deformation caused by bridge temperature changes, and controls the relative displacement of the pier beam under the action of earthquake.
It realizes that while meeting the durability requirements, it effectively controls the relative displacement of the pier under earthquake action, avoids high-circumference fatigue damage of the metal damper caused by temperature deformation, and reduces the risk of falling beams.
Smart Images
Figure CN116837713B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bridge vibration reduction and isolation, and in particular to a metal vibration damper connection structure. Background Art
[0002] Bridge structures are vital lifelines, and damage can severely hinder post-earthquake rescue efforts. Girder displacement is a common earthquake damage to beam bridges. Excessive relative displacement between piers and beams can lead to beam fall. This is especially true for bridges near faults, where velocity pulses can cause even greater structural displacement responses.
[0003] Installing dampers between piers and beams is an effective method for controlling the seismic response of bridges and reducing the risk of beam collapse. However, metal dampers are susceptible to corrosion and mechanical degradation due to long-term exposure to the natural environment, making them unable to meet the performance requirements of long-term bridge service. Furthermore, given the large span of the bridge, the expansion and contraction deformation of the main beam caused by temperature changes cannot be ignored. Therefore, the dampers must not only have good durability and the ability to control the relative displacement between the piers and beams, but also should not restrict the expansion and contraction deformation caused by temperature changes during normal bridge service. Therefore, it is necessary to design a metal vibration damper connection structure to meet these requirements. Summary of the Invention
[0004] The purpose of the present invention is to provide a metal shock-absorbing damper connection structure to solve the problems existing in the above-mentioned prior art. While meeting the durability requirements and effectively controlling the relative displacement of piers and beams under earthquake action, it does not affect the expansion and contraction deformation caused by temperature changes under normal service conditions of the bridge.
[0005] To achieve the above object, the present invention provides the following solutions:
[0006] The present invention provides a metal shock-absorbing damper connection structure, including a boot-shaped steel plate assembly, a column assembly and a metal damper energy-absorbing assembly, the boot-shaped steel plate assembly including a first base plate and a first vertical plate fixedly connected on both sides of the first base plate, a main beam cross beam is inserted between the two first vertical plates and the two first vertical plates are fixedly connected to the main beam cross beam by a first bolt and a first nut, the column assembly including a second base plate and a second vertical plate fixedly connected to the second base plate, the second base plate and the second vertical plate are connected to form an inverted T-shaped structure, angle steels are respectively connected on both sides of the second vertical plate by second bolts and second nuts, and a movable gap is provided between each angle steel and the second vertical plate in the longitudinal bridge direction, the angle steels on both sides are fixedly connected to the first base plate by a third bolt and a third nut, the second base plate is fixedly connected to the upper end of the metal damper energy-absorbing assembly by a fourth bolt and a fourth nut, and the lower end of the metal damper energy-absorbing assembly is fixedly connected to the cap beam by a chemical anchor bolt.
[0007] Preferably, the metal damper energy dissipation component includes four U-shaped steel strips, two circular holes are set at the open ends of the two side plates of the U-shaped steel strips, four circular holes are set on the second bottom plate on both sides of the second vertical plate, and the four U-shaped steel strips are symmetrically connected to the second bottom plate with the second vertical plate as the symmetry plane. The fourth bolt passes through the circular hole on the second bottom plate and the circular hole on one side plate of the U-shaped steel strip and is connected to the fourth nut to fix the second bottom plate and the U-shaped steel strip. The chemical anchor bolt passes through the circular hole on the other side plate of the U-shaped steel strip and is anchored to the cap beam.
[0008] Preferably, the relative displacement allowed between the second vertical plate and the angle steel in the longitudinal bridge direction is ±99 mm.
[0009] Preferably, a plurality of the oblong holes are arranged at the same height on the second vertical plate, and the length direction of the oblong holes is arranged vertically. A second bolt is passed through each oblong hole, and a plurality of circular holes corresponding to each of the oblong holes are arranged on the vertical side of the angle steel, and the two ends of the second bolt are respectively connected to the circular holes on the two vertical sides of the angle steel.
[0010] Preferably, a plurality of circular holes are provided on the horizontal side of the angle steel, and a plurality of circular holes corresponding to the circular holes on the horizontal side of the angle steel are respectively provided on both sides of the first base plate, and the third bolt passes through the circular holes on the first base plate and the horizontal side of the angle steel and is connected to the third nut to fix the first base plate to the angle steel.
[0011] Preferably, a groove is provided on each side of the bottom of the first bottom plate. After the second vertical plate moves in the longitudinal bridge direction and enters any one of the grooves, the second vertical plate and the first bottom plate are locked relative to each other in the longitudinal bridge direction.
[0012] Preferably, the bottom and both sides of the cross beams between the main beams are grout-filled with 10 mm and 2 mm thickness respectively.
[0013] Preferably, the boot-shaped steel plate assembly, the column assembly, the metal damper energy dissipation assembly, the first bolt, the first nut, the second bolt, the second nut, the third bolt, the third nut, the fourth bolt, the fourth nut and the chemical anchor are all made of stainless steel.
[0014] Compared with the prior art, the present invention has achieved the following technical effects:
[0015] The present invention provides a metal shock-absorbing damper connection structure, which connects an angle steel to each side of the second vertical plate of the column assembly and provides a movable gap between each angle steel and the second vertical plate in the longitudinal direction of the bridge, so that the connection structure has sufficient gap in the longitudinal direction of the bridge to adapt to the expansion and contraction deformation problem caused by temperature changes in the normal service state of the bridge, and avoids high-cycle fatigue damage of the metal damper caused by temperature expansion and contraction in the longitudinal direction of the bridge during the daily operation stage of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is an overall schematic diagram of the metal shock-absorbing damper connection structure provided by the present invention when it is installed and used;
[0018] Figure 2 A schematic front view of the metal shock-absorbing damper connection structure provided by the present invention;
[0019] Figure 3 A schematic side view of the metal shock-absorbing damper connection structure provided by the present invention;
[0020] Figure 4 It is a front view schematic diagram of the U-shaped steel strip in the present invention;
[0021] Figure 5 Schematic top view of the U-shaped steel strip in the present invention;
[0022] Figure 6 is a front view schematic diagram of the column assembly of the present invention;
[0023] Figure 7 is a top view schematic diagram of the column assembly of the present invention;
[0024] Figure 8 is a side view schematic diagram of the column assembly of the present invention;
[0025] Figure 9 This is a schematic diagram of the connection between the boot-shaped steel plate assembly and the cross beam between the main beams in the present invention.
[0026] In the figure: 1-boot-shaped steel plate assembly, 2-column assembly, 3-metal damper energy dissipation assembly, 4-first base plate, 5-first vertical plate, 6-cross beam between main beams, 7-first bolt, 8-first nut, 9-second base plate, 10-second vertical plate, 11-second bolt, 12-second nut, 13-angle steel, 14-oblong hole, 15-third bolt, 16-third nut, 17-fourth bolt, 18-fourth nut, 19-chemical anchor, 20-cap beam, 21-U-shaped steel plate, 22-groove, 23-grouting. DETAILED DESCRIPTION
[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0028] The purpose of the present invention is to provide a metal shock-absorbing damper connection structure to solve the problems existing in the prior art. While meeting the durability requirements and effectively controlling the relative displacement of piers and beams under earthquake action, it does not affect the expansion and contraction deformation caused by temperature changes under normal service conditions of the bridge.
[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] like Figures 1-9 As shown, this embodiment provides a metal shock-absorbing damper connection structure, including a boot-shaped steel plate assembly 1, a column assembly 2 and a metal damper energy dissipation assembly 3. The boot-shaped steel plate assembly 1 includes a first bottom plate 4 and a first vertical plate 5 fixedly connected to both sides of the first bottom plate 4. A main beam cross beam 6 is inserted between the two first vertical plates 5 and the two first vertical plates 5 are fixedly connected to the main beam cross beam 6 through a first bolt 7 and a first nut 8. The column assembly 2 includes a second bottom plate 9 and a second vertical plate 10 fixedly connected to the second bottom plate 9. The second bottom plate 9 and The second vertical plate 10 is connected to form an inverted T-shaped structure. Angle steels 13 are respectively connected to both sides of the second vertical plate 10 through second bolts 11 and second nuts 12. A movable gap is provided between each angle steel 13 and the second vertical plate 10 in the longitudinal bridge direction. The angle steels 13 on both sides are fixedly connected to the first base plate 4 through third bolts 15 and third nuts 16. The second base plate 9 is fixedly connected to the upper end of the metal damper energy dissipation component 3 through fourth bolts 17 and fourth nuts 18. The lower end of the metal damper energy dissipation component 3 is fixedly connected to the cap beam 20 through chemical anchor bolts 19.
[0031] By connecting an angle steel 13 on each side of the second vertical plate 10 of the column assembly 2 and providing a movable gap between each angle steel 13 and the second vertical plate 10 in the longitudinal direction of the bridge, the connection structure has sufficient gap in the longitudinal direction of the bridge to adapt to the expansion and contraction deformation problem caused by temperature changes in the normal service state of the bridge, and avoid high-cycle fatigue damage of the metal damper caused by temperature expansion and contraction in the longitudinal direction of the bridge during the daily operation stage of the bridge.
[0032] In this embodiment, the metal damper energy dissipation component 3 includes four U-shaped steel strips 21, and two circular holes are set at the open ends of the two side plates of the U-shaped steel strips 21. Four circular holes are set on the second bottom plate 9 on both sides of the second vertical plate 10. The four U-shaped steel strips 21 are symmetrically connected to the second bottom plate 9 with the second vertical plate 10 as the symmetry plane. The fourth bolt 17 passes through the circular hole on the second bottom plate 9 and the circular hole on one side plate of the U-shaped steel strip 21 and is connected to the fourth nut 18 to fix the second bottom plate 9 and the U-shaped steel strip 21. The chemical anchor bolt 19 passes through the circular hole on the other side plate of the U-shaped steel strip 21 and is anchored on the cap beam 20.
[0033] In this embodiment, the second vertical plate 10 and the angle steel 13 are allowed to move within a ±99mm relative displacement in the longitudinal direction to accommodate longitudinal expansion and contraction deformation caused by temperature changes during normal service, thereby preventing high-cycle fatigue failure of the metal damper energy-absorbing assembly 3 due to the fully fixed connection ends. The second vertical plate 10 and the angle steel 13 are completely fixed in the transverse direction, preventing relative displacement. Under earthquake conditions, the metal damper energy-absorbing assembly 3 participates in the transverse forces, dissipating seismic energy and limiting the relative displacement of the piers and beams, preventing transverse beam collapse. The use of this metal vibration damper connection structure facilitates controlling the relative displacement of the piers and beams under earthquake conditions, reducing the risk of beam collapse.
[0034] In this embodiment, multiple oblong holes 14 are provided at the same height on the second vertical plate 10, with the length of the oblong holes 14 extending vertically. A second bolt 11 is inserted through each oblong hole 14. Multiple circular holes are provided on the vertical sides of the angle steel 13, corresponding to each oblong hole 14. The ends of the second bolt 11 are connected to the circular holes on the vertical sides of the two angle steels 13. The pre-formed oblong holes 14 in the second vertical plate 10 relieve the metal damper from vertical stress caused by vertical displacement of the main beam during normal operation, improving the damper's tolerance for installation errors and better adapting to the construction process of a simply supported, then continuous beam bridge.
[0035] In this embodiment, multiple circular holes are set on the horizontal side of the angle steel 13, and multiple circular holes corresponding to the circular holes on the horizontal side of the angle steel 13 are respectively set on both sides of the first base plate 4. The third bolt 15 passes through the circular holes on the horizontal sides of the first base plate 4 and the angle steel 13 and is connected to the third nut 16 to fix the first base plate 4 and the angle steel 13.
[0036] In this embodiment, a groove 22 is provided on each side of the bottom of the first base plate 4. After the second vertical plate 10 moves in the longitudinal bridge direction and enters any one of the grooves 22, the second vertical plate 10 and the first base plate 4 are locked relative to each other in the longitudinal bridge direction. The metal damper energy-absorbing component 3 does not participate in the longitudinal bridge force when the earthquake action is small. When there is a near-fault pulse-type earthquake or a large earthquake action, the second vertical plate 10 slides to a groove 22 on one side and automatically locks. Then the metal damper energy-absorbing component 3 participates in the longitudinal bridge force, dissipates the earthquake energy and limits the relative displacement of the piers and beams, preventing longitudinal bridge beam damage. By pre-opening the groove 22 at the bottom of the first base plate 4, the self-locking function of the metal damper in the longitudinal bridge direction is realized when a strong earthquake occurs, giving full play to the energy dissipation and shock absorption capacity of the metal damper, and effectively controlling the relative displacement between the piers and beams under the action of the earthquake to reduce the risk of beam falling.
[0037] In this embodiment, grouting 23 with a thickness of 10 mm and 2 mm is performed on the bottom and both sides of the cross beam 6 between the main beams, respectively.
[0038] In this embodiment, the boot-shaped steel plate assembly 1, the column assembly 2, the metal damper energy dissipation assembly 3, the first bolt 7, the first nut 8, the second bolt 11, the second nut 12, the third bolt 15, the third nut 16, the fourth bolt 17, the fourth nut 18 and the chemical anchor 19 are all made of stainless steel, which can prevent performance degradation caused by rust and improve durability.
[0039] On-site installation includes the following steps:
[0040] S1. During on-site pouring, holes for installing the first bolts 7 are reserved in the cross beams 6 between the main beams, and holes for installing the chemical anchor bolts 19 are reserved in the cap beams 20;
[0041] S2. Install the shoe-shaped steel plate assembly 1 and connect and secure it to the inter-main beam cross beam 6 with the first bolt 7 and the first nut 8. During the installation process, 10 mm and 2 mm thick grouting is performed at the bottom and both sides of the cross beam respectively to ensure complete anchoring between the installation shoe-shaped steel plate assembly 1 and the inter-main beam cross beam 6.
[0042] S3, install the column assembly 2 and the angle steel 13, connect and fix the angle steel 13 to the shoe-shaped steel plate assembly 1 through the third bolt 15 and the third nut 16; and connect the angle steel 13 to the column assembly 2 through the second bolt 11 and the second nut 12;
[0043] S4. Install the metal damper energy-absorbing component 3, connect and fix its upper end to the column component 2 through the fourth bolt 17 and the fourth nut 18, and connect and fix its lower end to the cap beam 20 through the chemical anchor 19; during the installation process, the height of the column component 2 can be adjusted through the pre-opened oblong hole 14 on the second vertical plate 10 in the column component 2 to ensure that the metal damper energy-absorbing component 3 is not subjected to force in the vertical direction.
[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.
Claims
1. A metal shock absorber connection structure, characterized in that: The cam is connected to the second support frame by a first bolt and a second nut, and the cam is connected to the second support frame by a second nut. A groove is provided on both sides of the bottom of the first bottom plate. After the second vertical plate moves in the longitudinal bridge direction and enters any one of the grooves, the second vertical plate and the first bottom plate are relatively locked in the longitudinal bridge direction.
2. The metal vibration damper connection structure according to claim 1, characterized in that: The metal damper energy dissipation component includes four U-shaped steel strips, two circular holes are set on the open ends of the two side plates of the U-shaped steel strips, four circular holes are set on the second bottom plate on both sides of the second vertical plate, and the four U-shaped steel strips are symmetrically connected to the second bottom plate with the second vertical plate as the symmetry plane. The fourth bolt passes through the circular hole on the second bottom plate and the circular hole on one side plate of the U-shaped steel strip and is connected with the fourth nut to fix the second bottom plate and the U-shaped steel strip. The chemical anchor bolt passes through the circular hole on the other side plate of the U-shaped steel strip and is anchored on the cap beam.
3. The metal vibration damper connection structure according to claim 1, characterized in that: The relative displacement allowed between the second vertical plate and the angle steel in the longitudinal direction of the bridge is ±99 mm.
4. The metal vibration damper connection structure according to claim 1, characterized in that: A plurality of oblong holes are provided on the second vertical plate at the same height, and the length direction of the oblong holes is arranged vertically. A second bolt is passed through each oblong hole, and a plurality of circular holes corresponding to each oblong hole are provided on the vertical side of the angle steel, and the two ends of the second bolt are respectively connected to the circular holes on the two vertical sides of the angle steel.
5. The metal vibration damper connection structure according to claim 4, characterized in that: A plurality of circular holes are provided on the horizontal side of the angle steel, and a plurality of circular holes corresponding to the circular holes on the horizontal side of the angle steel are respectively provided on both sides of the first base plate. The third bolt passes through the circular holes on the first base plate and the horizontal side of the angle steel and is connected with the third nut to fix the first base plate and the angle steel.
6. The metal vibration damper connection structure according to claim 1, characterized in that: The bottom and both sides of the cross beams between the main beams are filled with 10mm and 2mm thick grouting respectively.
7. The metal vibration damper connection structure according to claim 1, characterized in that: The boot-shaped steel plate assembly, the column assembly, the metal damper energy dissipation assembly, the first bolt, the first nut, the second bolt, the second nut, the third bolt, the third nut, the fourth bolt, the fourth nut and the chemical anchor are all made of stainless steel.
Citation Information
Patent Citations
Damping friction support
CN107012786A
Bidirectional function separation type seismic reduction system
CN109653082A