An AIDS bearing and displacement self-repair and self-control system for flat curved bridges resistant to strong earthquake lateral displacement

Abstract

The present invention discloses an AIDS bearing for a flat curved bridge that is resistant to strong earthquake lateral displacement and a displacement self-repair and self-control system. The bottom of the AIDS bearing is fixed to the top of the pier, and the AIDS bearing is placed at the connection between the beam ends or the connection between the ends of the curved bridge. The AIDS bearing comprises, from bottom to top, a rubber-steel pad, a limit lock, a longitudinal damping shock absorber, a longitudinal displacement sensor and an upper steel pad. The shock absorption and buffering direction of the AIDS bearing is along the length direction of the bridge, that is, the longitudinal direction. The rubber-steel pad is fixed to the top of the pier, and the longitudinal damping shock absorber is located directly above the rubber-steel pad. The longitudinal damping shock absorber can move back and forth in the longitudinal direction. The AIDS bearing also includes a longitudinal displacement sensor fixed on the longitudinal damping shock absorber, and the longitudinal displacement sensor is used to monitor the vibration displacement value of the longitudinal damping shock absorber.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent bearings, and in particular relates to an AIDS bearing for a flat curved bridge capable of resisting strong earthquake lateral displacement and a displacement self-repairing and self-control system. Background Art

[0002] Earthquake disasters pose a significant threat to infrastructure such as bridges, especially at the transition sections, joints, and connections between elevated bridges and abutments and platforms. Because the structural forces in these areas are complex and relatively weak in design, earthquakes can amplify the destructive effects. Furthermore, in recent years, many curved bridges have been built to enhance the aesthetics of urban traffic. These curved bridges, with their specific turning radius, pose uncertainty about whether the structures can function properly during a major earthquake. Structurally, curved bridges themselves generate horizontal centrifugal forces on vehicles traveling on them. The transition sections, joints, and connections between bridges and abutments and platforms experience significant sway due to the shear effects of earthquake waves, resulting in relative lateral swing amplitude and displacement differences. The lateral horizontal forces exerted on the bridge by the external loads caused by earthquakes increase the torque on the beam section and the bending moment on the piers, potentially causing lateral displacement or in-plane rotation of the bridge.

[0003] Scholars have published or made public documents that the main method for earthquake resistance of flat curved bridges is to add auxiliary shock-absorbing structures, such as rubber pads and springs. Generally, external support frames are used on the piers at the bridge head joints, or transverse self-resetting bearings are used to prevent the bridge deck from overturning. There are also energy-absorbing buffering, limiting and seismic isolation bearings with damping plates. The above-mentioned shock-absorbing and buffering bearings can only provide a certain buffering effect on the limited structure, which is mainly limited to the existing general structure, passive and secondary functions, and cannot achieve precise automatic control and autonomous adjustment. Although individual functions are added or improved on the existing structure, they are essentially structural fine-tuning; secondly, they cannot overcome the disadvantages of human factors in special environments, such as the influence of unfavorable climate and natural environmental conditions such as the hinterland of the Qinghai-Tibet Plateau, deep mountain streams, and heavy rain after strong earthquakes. It also cannot realize the strong earthquake health monitoring of flat curve bridges at key hubs and the autonomous adjustment of bridge lateral displacement under strong earthquakes through 5G module linkage, autonomous adjustment, and background real-time data monitoring and exchange; finally, there is a lack of a combination of software and hardware system to achieve an intelligent algorithm to drive the hardware to perform real-time and precise adjustment of large and small lateral displacements of the bridge deck under strong earthquakes. Summary of the Invention

[0004] In response to the problem that transition sections, overlaps, and connecting ends between bridges and abutments and platforms are easily damaged by earthquakes, the present invention, in combination with the development of existing seismic isolation technology, provides an AIDS bearing for a flat curve bridge that can resist strong earthquake lateral displacement and an AI intelligent damping self-repairing automatic control system, so as to realize automatic adjustment of the lateral displacement of the flat curve bridge under earthquake conditions in all-weather, fully automated, adaptive, and multi-linkage conditions, thereby improving the seismic design of the bridge and reducing the probability of damage by an earthquake.

[0005] To this end, the present invention adopts the following technical solutions:

[0006] An AIDS bearing for a flat curved bridge that resists strong earthquake lateral displacement and a displacement self-repair and self-control system. The bottom of the AIDS bearing is fixed to the top of the bridge pier. The AIDS bearing is placed at the connection between the beam end or the connection between the end of the curved bridge.

[0007] From bottom to top, the AIDS bearing consists of a rubber-steel pad, a limit lock, a longitudinal damping shock absorber, a longitudinal displacement sensor, and an upper steel pad. The AIDS bearing's shock absorption and buffering direction is along the length of the bridge, i.e., the longitudinal direction.

[0008] The rubber-steel pad is fixed on the top of the pier, and the longitudinal damping shock absorber is located directly above the rubber-steel pad. The longitudinal damping shock absorber can move back and forth in the longitudinal direction.

[0009] The longitudinal damping shock absorber further includes a longitudinal displacement sensor fixed to the longitudinal damping shock absorber, the longitudinal displacement sensor being used to monitor the vibration displacement value of the longitudinal damping shock absorber; a vertical limit lock is also provided between the rubber-steel pad and the longitudinal damping shock absorber, the lower end of the limit lock being fixed to the rubber-steel pad, and a limit hole corresponding to the limit lock is provided on the bottom surface of the longitudinal damping shock absorber, and when the limit lock is extended, it extends into the limit hole to limit the movement of the longitudinal damping shock absorber;

[0010] A communication module is also provided on the longitudinal damping shock absorber, and the communication module is wirelessly connected to the control module; the communication module is respectively connected to the longitudinal displacement sensor, the longitudinal damping shock absorber, and the limit lock signal; when the longitudinal displacement sensor detects that the threshold of the vibration displacement is greater than the safety threshold preset in the control module, the control module controls the limit lock to retract through the communication module, and controls the longitudinal damping shock absorber to roll in the opposite direction of the vibration displacement to buffer and reduce the amplitude of the bridge.

[0011] Furthermore, the longitudinal damping shock absorber includes a longitudinal adjustment plate and transverse electrically controlled balls. The transverse electrically controlled balls include multiple rows, the multiple rows of transverse electrically controlled balls are connected in a rectangular frame, and both ends of the transverse electrically controlled balls are rotatably connected to the rectangular frame. The transverse electrically controlled balls are connected to a servo motor via a flange structure, and the servo motor signal is connected to a host computer, and the servo motor is used to drive the electrically controlled balls to rotate.

[0012] A rectangular groove is provided on the bottom surface of the longitudinal adjustment plate, and a corresponding rectangular groove is also provided on the upper surface of the rubber-steel pad. The transverse electric-controlled ball bearings are arranged in the rectangular grooves.

[0013] Furthermore, the communication module is a 5G module.

[0014] Furthermore, it also includes a pin-connected piston, which is vertically arranged between the rubber-steel pad and the longitudinal damping shock absorber. The upper end of the pin-connected piston is fixed on the longitudinal damping shock absorber. The upper surface of the rubber-steel pad is provided with a long groove-shaped guide groove, and the lower end of the pin-connected piston is inserted into the guide groove. The pin-connected piston is used to provide guidance for the movement of the longitudinal damping shock absorber.

[0015] 1) The working principle of the AIDS support of the present invention is as follows:

[0016] This earthquake-resistant bridge AIDS bearing is mainly composed of damping and shock-absorbing components, longitudinal damping shock absorbers at the beam end joints, and longitudinal displacement sensors. It monitors and records the longitudinal displacement of the bridge under the action of an earthquake, and predicts the trend of the longitudinal displacement after shock absorption. In particular, the higher the earthquake amplitude and frequency, the better the shock absorption effect, which realizes the automatic repair of the bridge and prevents the bridge from overturning, beam falling, and collision damage under earthquakes. A steel pad is set on the top of the longitudinal damping shock absorber, and the longitudinal damping shock absorber is connected to the upper bridge through a groove. The rubber-steel pad is connected to the bridge pier and has a certain length of slide. The control module controls the displacement and monitors the results through the communication module, controls the limit lock to lock the movement of the longitudinal damping shock absorber, and controls the adaptive adjustment within a certain offset displacement; the vector displacement size control principle is as follows:

[0017] 2) The vector displacement is not greater than the allowable value

[0018] The main shear waves of earthquake waves are extremely destructive. When they are transmitted to the bridge, the limit lock remains open. Due to the restriction of the hinged pin, the other end moves longitudinally. The longitudinal displacement sensor detects and records the earthquake waves. When the vector displacement is small, the longitudinal damping shock absorber starts working and slides along the slide to achieve damping and energy absorption. The slide has a relative position, which can achieve displacement within a limited range of the longitudinal damping shock absorber. Under the action of adaptive damping, the displacement returns to the initial position. The limit lock records the position data of the longitudinal displacement sensor. The longitudinal displacement sensor receives the longitudinal displacement of the bridge end caused by the earthquake, or between the curved bridge and the platform or abutment. This changing longitudinal displacement is continuously monitored by the longitudinal displacement sensor:

[0019] a. Small vector displacement

[0020] The limit lock works and is in the open state. The longitudinal damping shock absorber and the transverse electronically controlled ball start working. The servo motor does not participate in the work. The adaptive damping shock absorption plays a role to offset the longitudinal seismic displacement. When the displacement is less than the threshold △u, the control module compares the longitudinal displacement sensor data with the initial position. The limit lock is gradually locked to maintain the bridge and pier, or the curved bridge and the platform, and the bridge abutment with small displacement self-returning and keep the relative position of the two unchanged, working together.

[0021]

[0022]

[0023]

[0024] b. Vector displacement is greater than the allowable value

[0025] In the case of large vector displacement, the longitudinal displacement sensor receives the displacement signal caused by the earthquake. When the vector displacement difference exceeds the threshold, the limit lock is in the open state, and the longitudinal damping shock absorber takes effect, continuously consuming energy to reduce the displacement. When the bridge displacement is too large and there is a risk of beam falling, the limit lock gradually closes. The control module controls the longitudinal damping shock absorber and the transverse electronically controlled ball bearing to move in the opposite direction based on the comparison of the longitudinal displacement sensor data with the initial position, so as to automatically correct the transverse displacement of the general bridge or curved bridge relative to the next transition section and the abutment or platform. This prevents beam falling and automatically realizes repair, ensuring that the bridge position relative to the support remains unchanged.

[0026] (1) LiDAR wave vector displacement:

[0027]

[0028]

[0029]

[0030]

[0031] To adjust the longitudinal displacement of bridge ends, curved bridges and transition sections, abutments, and platforms, the control module obtains the adjusted displacement through the longitudinal displacement sensor, which includes the difference between the center position of the bridge relative to the centering device and the predicted value of its seismic wave residual energy, that is, vector offset + predicted correction value. The signal is transmitted to the longitudinal damping shock absorber and the transverse electronically controlled ball to start working, converting the actual displacement into ±△s and reversely offsetting + correcting it. The relative displacement of the bridge beam end is less than the allowable value.

[0032] The design principle of the present invention:

[0033] 1. This invention provides a new AIDS bearing, a hardware and software integration system that uses 5G communication and algorithm-driven hardware to precisely adjust large and small lateral displacements of the bridge deck under strong earthquakes in real time, achieving automatic reset, automatic precision adjustment, and damping. It also features real-time monitoring of the bridge bearing's health, a software and hardware linkage system with 5G modules to achieve reset and health monitoring of bridge displacements under strong earthquakes, and real-time data monitoring in the background.

[0034] 2. The present invention provides a linkage adjustment and monitoring system for the bridge supports of a flat curved bridge, which overcomes the disadvantages of human factors in special environments, such as the influence of unfavorable climatic and natural environmental conditions such as the hinterland of the Qinghai-Tibet Plateau, deep mountain streams, and heavy rain after a strong earthquake. Through 5G module linkage, autonomous adjustment, and background real-time data monitoring and exchange, it realizes the strong earthquake health monitoring of flat curved bridges at key hubs and the autonomous adjustment of bridge lateral displacement under strong earthquakes.

[0035] The beneficial effects of the present invention are:

[0036] 1. Existing bridge bearings, especially those on flat curved bridges, cannot achieve the effect of strong earthquake dampers at the joints. They also have no automatic and precise adjustment function, no real-time monitoring function of the normal condition of the bridge bearings, no intelligent control algorithm system, and cannot realize the strong earthquake displacement reset and health detection function of the bridge by combining the linkage system of software and hardware with 5G modules. The present invention is an AIDS damping bearing and an automatic control system algorithm for strong earthquake intelligent displacement self-repair. When a strong earthquake strikes, the structure detects lateral displacement of the bridge and the lower structure, compares the lateral displacement with the threshold, and when the displacement is less than the threshold, the damper bearing is autonomously adjusted. When the displacement is ≥ the threshold, the AIDS damper bearing and the automatic control system algorithm for intelligent displacement self-repair are linked and adjusted. Combined with 5G data exchange, the background can also monitor displacement changes and detect the normal and healthy working status of the bridge at any time.

[0037] 2. In order to prevent the lateral displacement of the bridge under strong earthquake, the existing flat curve bridge is equipped with a seismic block on the side of the cap beam. Since it mainly bears shear force, it is often very likely to be damaged by shear when a strong earthquake strikes. The present invention has an AIDS damping support with a built-in limit lock, which has a certain flexibility and linkage opening and closing adjustment function. The main performance is as follows: it is usually in a locked state. When an earthquake is detected, the upper and lower damping plates are opened to reduce shock and buffer. When the intelligent automatic control system adjusts the displacement appropriately, it is in a locked state.

[0038] 3. Existing bridges mostly use flexible systems or rubber bearings for shock absorption and cushioning. However, these bearings only provide a certain degree of cushioning in a limited structure. The main limitation is that the existing general structure and passive shock absorption cannot achieve precise automatic control, self-adjustment, intelligence, and real-time data interconnection. As time goes by, it is inevitable to replace aging and fragile rubber bearings, which also incurs certain operating costs and time costs. When a strong earthquake strikes, there is a certain possibility that they will not function. The present invention is a durable and reliable component that not only acts as a damper, but also has strong adaptability to high-altitude environments, replacing manual automatic data processing.

[0039] 4. It is difficult for existing bridges to achieve strong earthquake health monitoring, background real-time data monitoring, and autonomous adjustment functions for key hubs, and they often require human maintenance. When in special environments, such as the hinterland of the Qinghai-Tibet Plateau, deep mountain streams, and unfavorable climate and natural environmental conditions such as heavy rain after a strong earthquake, the present invention has strong earthquake health monitoring, 5G linkage, background real-time data monitoring, and autonomous adjustment functions, which are particularly critical.

[0040] 5. This structure is highly versatile and adaptable, and is relatively easy to implement and more popular. Due to the large number of existing bridges in my country, bridge AIDS damping bearings are particularly critical for key hub lines, locations vulnerable to strong earthquakes, and lap transition sections, and the market size is considerable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the layout of the AIDS support of the present invention Figure 1 ;

[0042] Figure 2 This is a schematic diagram of the layout of the AIDS support of the present invention Figure 2 ;

[0043] Figure 3 This is a cross-sectional view of the structure of the AIDS support of the present invention;

[0044] Figure 4 This is a top view of the layout of the AIDS support of the present invention;

[0045] Figure 5 It is a work flow chart of the automatic control system of the present invention;

[0046] In the figure: 1-longitudinal damping shock absorber, 2-pin-connected piston, 3-rubber-steel pad, 4-limit lock, 5-longitudinal displacement sensor, 6-upper steel pad, 7-slide, 8-transverse electronically controlled ball bearing, 9-communication module. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0048] like Figures 1 to 4As shown, an AIDS bearing and displacement self-repair and automatic control system for a flat curved bridge that is resistant to strong earthquake lateral displacement are shown. The bottom of the AIDS bearing is fixed to the top of the bridge pier, and the AIDS bearing is placed at the connection between the beam ends or the connection between the ends of the curved bridge. From bottom to top, the AIDS bearing includes a rubber-steel pad 3, a limit lock 4, a longitudinal damping shock absorber 1, a longitudinal displacement sensor 5 and an upper steel pad 6. The shock absorption and buffering direction of the AIDS bearing is along the length of the bridge, that is, the longitudinal direction. The rubber-steel pad 3 is fixed to the top of the bridge pier, and the longitudinal damping shock absorber 1 is located directly above the rubber-steel pad 3. The longitudinal damping shock absorber 1 can move back and forth in the longitudinal direction.

[0049] It also includes a longitudinal displacement sensor 5 fixed on the longitudinal damping shock absorber 1, which is used to monitor the vibration displacement value of the longitudinal damping shock absorber 1; a vertical limit lock 4 is also provided between the rubber-steel pad 3 and the longitudinal damping shock absorber 1, and the lower end of the limit lock 4 is fixed on the rubber-steel pad 3. The bottom surface of the longitudinal damping shock absorber 1 is provided with a limit hole corresponding to the limit lock 4. When the limit lock 4 is extended, it extends into the limit hole to limit the movement of the longitudinal damping shock absorber 1.

[0050] The longitudinal damping shock absorber 1 includes a longitudinal adjustment plate and transverse electrically controlled balls 8 . The transverse electrically controlled balls 8 are arranged in multiple rows within a rectangular frame, with both ends of the transverse electrically controlled balls 8 rotatably connected to the frame. The transverse electrically controlled balls 8 are connected to a servo motor via a flange structure. The servo motor's signals are connected to a host computer, and the servo motor is used to drive the electrically controlled balls. A rectangular groove is defined on the bottom surface of the longitudinal adjustment plate, and a corresponding rectangular groove is also defined on the top surface of the rubber-steel backing plate 3 . The transverse electrically controlled balls 8 are arranged within the rectangular groove. The rectangular groove forms a slideway 7 .

[0051] The longitudinal damping shock absorber 1 is also provided with a communication module 9, which is wirelessly connected to the control module. The communication module 9 is respectively connected to the longitudinal displacement sensor 5, the longitudinal damping shock absorber 1, and the limit lock 4. When the longitudinal displacement sensor 5 detects that the threshold of the vibration displacement is greater than the safety threshold preset in the control module, the control module controls the limit lock 4 to retract through the communication module 9 and controls the longitudinal damping shock absorber 1 to roll in the opposite direction of the vibration displacement to buffer and reduce the amplitude of the bridge. It also includes a pinned piston 2, which is vertically arranged between the rubber-steel pad 3 and the longitudinal damping shock absorber 1. The upper end of the pinned piston 2 is fixed to the longitudinal damping shock absorber 1. The upper surface of the rubber-steel pad 3 is provided with a long groove-shaped guide groove, and the lower end of the pinned piston 2 is inserted into the guide groove. The pinned piston 2 is used to provide guidance for the movement of the longitudinal damping shock absorber 1.

Claims

1. An AIDS bearing for a flat curved bridge that resists strong earthquake lateral displacement, characterized by: The bottom of the AIDS support is fixed to the top of the pier, and the AIDS support is placed at the connection between the beam end or the connection between the curved bridge end; From bottom to top, the AIDS bearing consists of a rubber-steel pad, a limit lock, a longitudinal damping shock absorber, a longitudinal displacement sensor, and an upper steel pad. The AIDS bearing's shock absorption and buffering direction is along the length of the bridge, i.e., the longitudinal direction. The rubber-steel pad is fixed on the top of the pier, and the longitudinal damping shock absorber is located directly above the rubber-steel pad. The longitudinal damping shock absorber can move back and forth in the longitudinal direction. The longitudinal damping shock absorber further includes a longitudinal displacement sensor fixed to the longitudinal damping shock absorber, the longitudinal displacement sensor being used to monitor the vibration displacement value of the longitudinal damping shock absorber; a vertical limit lock is also provided between the rubber-steel pad and the longitudinal damping shock absorber, the lower end of the limit lock being fixed to the rubber-steel pad, and a limit hole corresponding to the limit lock is provided on the bottom surface of the longitudinal damping shock absorber, and when the limit lock is extended, it extends into the limit hole to limit the movement of the longitudinal damping shock absorber; A communication module is also provided on the longitudinal damping shock absorber, and the communication module is wirelessly connected to the control module; the communication module is respectively connected to the longitudinal displacement sensor, the longitudinal damping shock absorber, and the limit lock signal; when the longitudinal displacement sensor detects that the threshold of the vibration displacement is greater than the safety threshold preset in the control module, the control module controls the limit lock to retract through the communication module, and controls the longitudinal damping shock absorber to roll in the opposite direction of the vibration displacement to buffer and reduce the amplitude of the bridge.

2. The AIDS bearing for a flat curved bridge capable of resisting strong earthquake lateral displacement according to claim 1 is characterized in that: The longitudinal damping shock absorber includes a longitudinal adjustment plate and transverse electrically controlled balls, the transverse electrically controlled balls include multiple rows, the multiple rows of transverse electrically controlled balls are connected in a rectangular frame, and both ends of the transverse electrically controlled balls are rotatably connected to the rectangular frame; The transverse electric-controlled ball bearing is connected to a servo motor through a flange structure. The servo motor signal is connected to the host computer. The servo motor is used to drive the electric-controlled ball bearing to rotate. A rectangular groove is provided on the bottom surface of the longitudinal adjustment plate, and a corresponding rectangular groove is also provided on the upper surface of the rubber-steel pad. The transverse electrically controlled ball bearings are arranged in the rectangular groove.

3. The AIDS bearing for a flat curved bridge capable of resisting strong earthquake lateral displacement according to claim 1 is characterized in that: The communication module is a 5G module.

4. The AIDS bearing for a flat curved bridge capable of resisting strong earthquake lateral displacement according to claim 1 is characterized in that: It also includes a pin-connected piston, which is vertically arranged between the rubber-steel pad and the longitudinal damping shock absorber. The upper end of the pin-connected piston is fixed on the longitudinal damping shock absorber. A long groove-shaped guide groove is provided on the upper surface of the rubber-steel pad. The lower end of the pin-connected piston penetrates into the guide groove. The pin-connected piston is used to provide guidance for the movement of the longitudinal damping shock absorber.

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