Earthquake early warning system controlled anti-seismic support and active adaptive adjustment method

Abstract

The application provides an earthquake early warning system controlled anti-seismic support and an active adaptive adjustment method, which comprises a support bottom plate, the support bottom plate is provided with: lateral support plates; a horizontal bottom plate and a horizontal top plate located between the two lateral support plates; an upper sliding swing seat and a lower sliding swing seat; a center sliding block located between the upper sliding swing seat and the lower sliding swing seat; a hydraulic machine matrix provided with four groups and distributed on two opposite side walls of the two lateral support plates and corresponding to two opposite side walls of the upper sliding swing seat and the lower sliding swing seat respectively and independently; an oil pump control system for controlling the work of a single or multiple oil hydraulic machines in the hydraulic machine matrix; an earthquake early warning and control system for receiving earthquake information and controlling the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic machine matrix. The application can actively adjust the stiffness and damping of the local response after receiving the earthquake early warning information and can be completely reset after the earthquake.

Description

Technical Field

[0001] This application relates to the field of bridge seismic resistance technology, and in particular to a seismic bearing controlled by an earthquake early warning system and an active adaptive adjustment method. Background Technology

[0002] Bridge damage during earthquakes often results in huge economic losses and casualties. As an important component of seismic isolation technology, seismic isolation bearings play a vital role in the seismic resistance of bridges.

[0003] Seismic control design can be categorized into three types: passive control, semi-active control, and active control. Passive control methods, such as friction pendulum bearings and viscous dampers, do not require external energy; they control structural vibration by altering the structural dynamics or increasing structural damping. Active control methods involve monitoring and controlling the system to calculate the required damping force and applying corresponding control forces using external energy. Semi-active control methods utilize external energy to adjust relevant structural parameters, such as varying stiffness and damping, to achieve structural vibration control.

[0004] Traditional seismic bearing designs typically employ a passive control approach, failing to fully leverage the advanced features and functionality of modern earthquake early warning systems. Therefore, designing a seismic bearing capable of actively adjusting local stiffness and damping parameters upon receiving earthquake early warning information is of great significance. Summary of the Invention

[0005] In order to dynamically adjust the damping and stiffness of seismic bearings based on earthquake early warning information, this application provides a seismic bearing controlled by an earthquake early warning system and an active adaptive adjustment method.

[0006] In the first aspect, the seismic bearing controlled by the earthquake early warning system provided in this application adopts the following technical solution: An earthquake-resistant bearing controlled by an earthquake early warning system includes a bearing base plate, wherein the bearing base plate is provided with: There are two lateral support plates, which are arranged vertically and parallel to each other. The horizontal bottom plate and the horizontal top plate are arranged horizontally parallel and spaced apart, and are located between the two lateral support plates; The upper sliding swing seat and the lower sliding swing seat are respectively fixed to the horizontal top plate and the horizontal bottom plate and are located on opposite sides of the two; The central slider is located between the upper sliding base and the lower sliding base; The hydraulic press matrix has four groups distributed on the two opposite side walls of the two lateral support plates, and each group corresponds independently to one of the two opposite side walls of the upper sliding swing seat and the lower sliding swing seat. The oil pump control system is used to control the operation of one or more hydraulic presses in the hydraulic press matrix; and An earthquake early warning and control system is used to receive earthquake information and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix.

[0007] Furthermore, the upper sliding pendulum seat, the central slider, and the lower sliding pendulum seat together form a friction pendulum support, which is used to provide initial stiffness and damping. The upper and lower ends of the central slider can slide relative to the upper and lower sliding pendulum seats.

[0008] Furthermore, the sensor system includes: Torque sensor, used to measure the magnitude and direction of the torque subjected to a structure; Tilt sensors are used to measure the tilt angle and direction of a structure; Displacement sensors are used to measure the horizontal displacement of a structure; and Oil pressure sensors are used to monitor the oil pressure of each hydraulic press in the hydraulic press matrix in real time; The earthquake early warning and control system is configured to receive earthquake information and sensor system detection information, and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix.

[0009] Furthermore, when the absolute value of the torque sensor reading is greater than the first dead zone threshold, the earthquake early warning and control system determines the torque direction based on the readings of the torque sensors on both sides, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the torque direction to lift outward until the absolute value of the torque sensor reading is reduced to within the first dead zone threshold.

[0010] Furthermore, when the absolute value of the tilt sensor reading is greater than the second dead zone threshold, the earthquake early warning and control system determines the tilt direction based on the readings of the tilt sensors on both the upper and lower sides, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the tilt direction to lift outward until the tilt sensor reading approaches 0°.

[0011] Furthermore, when the absolute value of the displacement sensor reading is greater than the third dead zone threshold, the earthquake early warning and control system determines the translational direction based on the readings of the displacement sensors at both ends, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the translational direction to lift outward until the absolute value of the displacement sensor reading decreases to within the third dead zone threshold.

[0012] Furthermore, the earthquake early warning and control system calculates the target oil pressure value of each hydraulic press in the target hydraulic press matrix and outputs a control signal to the oil pump control system. The oil pump control system is used to control the start / stop, speed, and delivery direction of the corresponding oil pumps of the hydraulic presses, as well as the oil pressure regulating valves of each hydraulic press, so that the oil pressure sensor detection value of each hydraulic press in the target hydraulic press matrix is ​​equal to the target oil pressure value.

[0013] Furthermore, after receiving and processing earthquake early warning information, the earthquake early warning and control system calculates the target oil pressure value of each hydraulic press in the target hydraulic press matrix and controls the oil pump control system to work, so as to achieve the effect of accurately adjusting the local stiffness and damping parameters of the seismic support.

[0014] Furthermore, the horizontal base plate is fixedly connected to the support base plate, and the upper sliding swing seat is provided with a limit baffle to prevent the swing displacement from exceeding the limit and causing the device to fail.

[0015] Secondly, this application provides an active adaptive adjustment method for seismic-resistant bearings controlled by an earthquake early warning system, based on the aforementioned seismic-resistant bearings controlled by an earthquake early warning system, comprising the following steps: After receiving and processing earthquake early warning information, the earthquake early warning and control system calculates the damping force required by the structure, converts it into the target oil pressure value of each hydraulic press in the target hydraulic press matrix, and sends the control signal to the oil pump control system. The oil pump control system controls the corresponding hydraulic press in the corresponding hydraulic press matrix to work. The torque sensor, tilt sensor, and displacement sensor in the sensor system monitor the structural status in real time and feed back the detection signals to the earthquake early warning and control system. The earthquake early warning and control system compares the detected values ​​of the sensor system with the preset values, and controls the oil pump control system to make corrections and maintain the structural state in the preset state.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. Initial stiffness and damping are provided by friction pendulum support, and a variable device composed of hydraulic press matrix and oil pump control system realizes fine adjustment of local damping and stiffness. The earthquake early warning and control system receives earthquake information and controls the variable device to adjust local damping and stiffness. After receiving earthquake early warning information, it can actively adjust the stiffness and damping of local response and can be fully restored after the earthquake. 2. By continuously varying local damping and stiffness parameters and precisely controlling the response of seismic bearings, different needs can be met for earthquakes of different intensities, and strong local adjustment and post-earthquake self-resetting capabilities can be achieved. This active adaptive adjustment method enables the seismic bearings of this application to maintain good working condition under earthquakes of different intensities, significantly improving the seismic safety of building structures. 3. By incorporating a hydraulic pressure sensor, the seismic bearing of this application also possesses a self-diagnostic function. When any sensor in the sensor system, such as torque, tilt, or displacement, experiences abnormal data or malfunction, and the value detected by the hydraulic pressure sensor also becomes abnormal, the earthquake early warning and control system can automatically identify the fault type and location by comparing the values ​​of the torque sensor, tilt sensor, or displacement sensor with those of the hydraulic pressure sensor. After issuing a fault alarm through an alarm device, it can remind maintenance personnel to handle the situation promptly, ensuring the long-term reliable operation of the entire seismic bearing system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the friction pendulum support according to an embodiment of this application; Figure 3 This is a schematic diagram of the hydraulic press matrix distribution according to an embodiment of this application; Figure 4 This is a flowchart illustrating the working principle of this application embodiment in an earthquake.

[0019] Figure label: 1. Horizontal top plate; 2. Horizontal bottom plate; 3. Central slider; 4. Hydraulic press matrix; 5. Lateral support plate; 6. Earthquake early warning and control system; 7. Support base plate; 8. Upper sliding swing seat; 9. Lower sliding swing seat. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] Reference Figure 1 This application discloses a seismic bearing controlled by an earthquake early warning system, which includes a bearing base plate 7, on which: The side support plate 5 has two plates that are vertically parallel and spaced apart.

[0022] The horizontal base plate 2 and the horizontal top plate 1 are arranged horizontally parallel and spaced apart, and are located between the two lateral support plates 5. The upper sliding swing seat 8 and the lower sliding swing seat 9 are fixedly connected to the horizontal top plate 1 and the horizontal base plate 2 respectively and are located on opposite sides of the two; specifically, the horizontal top plate 1 is welded and fixed to the upper end face of the upper sliding swing seat 8, and the horizontal base plate 2 is welded and fixed to the lower end face of the lower sliding swing seat 9.

[0023] The central slider 3 is located between the upper sliding base 8 and the lower sliding base 9.

[0024] The hydraulic press matrix 4 has four sets distributed on the two opposite side walls of the two lateral support plates 5, and each set corresponds independently to the two opposite side walls of the upper sliding swing seat 8 and the lower sliding swing seat 9. Specifically, two sets of hydraulic press matrices 4 correspond to the two opposite side walls of the upper sliding swing seat 8 near the two lateral support plates 5, and the other two sets of hydraulic press matrices 4 correspond to the two opposite side walls of the lower sliding swing seat 9 near the two lateral support plates 5.

[0025] The oil pump control system is used to control the operation of one or more hydraulic presses in the hydraulic press matrix 4.

[0026] The earthquake early warning and control system 6 is used to receive earthquake information and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix 4.

[0027] The upper sliding pendulum seat 8, the central slider 3, and the lower sliding pendulum seat 9 together form a friction pendulum support, which provides initial stiffness and damping. The upper and lower ends of the central slider 3 can slide relative to the upper sliding pendulum seat 8 and the lower sliding pendulum seat 9, respectively. The horizontal base plate 2 is welded and fixedly connected to the support base plate 7. The upper sliding pendulum seat 8 is equipped with a limit baffle to prevent the pendulum displacement from exceeding the limit and causing the device to fail.

[0028] When the earthquake early warning and control system 6 receives earthquake information, it quickly analyzes parameters such as earthquake magnitude and epicentral distance, and then sends instructions to the oil pump control system. The oil pump control system then drives the corresponding hydraulic press matrix 4 to work, and changes the extension and contraction of the hydraulic presses in the corresponding areas of the hydraulic press matrix 4 by adjusting the pressure of the hydraulic oil, thereby achieving precise adjustment of the local damping and stiffness of the friction pendulum support.

[0029] When encountering minor earthquakes, the hydraulic press matrix 4 provides only minor damping and stiffness, allowing the friction pendulum bearing to primarily rely on its initial performance for energy absorption. However, during strong earthquakes, the earthquake early warning and control system 6 controls the hydraulic press matrix 4 to rapidly increase damping and stiffness, effectively limiting the sliding amplitude of the upper and lower sliding pendulum bearings 8 and 9, preventing premature triggering of the limit baffles or damage to the device due to excessive displacement. Through continuous variation of local damping and stiffness parameters and precise control of the seismic bearing response, it can meet the different needs of earthquakes of varying intensities, possessing strong local adjustment and post-earthquake self-resetting capabilities.

[0030] This active adaptive adjustment method enables the seismic bearings to maintain good working condition under earthquakes of different intensities, significantly improving the seismic safety of building structures.

[0031] In addition, the seismic bearing of this application also includes: a sensor system, which includes: Torque sensor, used to measure the magnitude and direction of the torque subjected to a structure; Tilt sensors are used to measure the tilt angle and direction of a structure; Displacement sensors are used to measure the horizontal displacement of a structure; and Oil pressure sensors are used to monitor the oil pressure of each hydraulic press in the hydraulic press matrix 4 in real time; The earthquake early warning and control system 6 is configured to receive earthquake information and sensor system detection information, and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix 4.

[0032] Specifically, when the absolute value of the torque sensor reading exceeds the first dead zone threshold, the earthquake early warning and control system 6 determines the torque direction based on the readings of the torque sensors on both sides, and controls the oil pump control system to adjust the hydraulic press matrix 4 corresponding to the torque direction to lift outwards until the absolute value of the torque sensor reading decreases to within the first dead zone threshold. For example, defining clockwise as the positive direction, when the torque sensor reading is greater than zero, it is considered a clockwise torque. At this time, the earthquake early warning and control system 6 calculates the required increase in pressure P in the hydraulic press oil chamber of the corresponding hydraulic press matrix 4, and controls the oil pump control system to adjust the oil supply line and flow rate so that the pressure in the target hydraulic press oil chamber reaches the pressure value P.

[0033] When the absolute value of the tilt sensor reading is greater than the second dead zone threshold, the earthquake early warning and control system 6 determines the tilt direction based on the readings of the tilt sensors on the upper and lower sides, and controls the oil pump control system to adjust the hydraulic press matrix 4 corresponding to the tilt direction to lift outward until the tilt sensor reading approaches 0°.

[0034] When the absolute value of the displacement sensor reading is greater than the third dead zone threshold, the earthquake early warning and control system 6 determines the translational direction based on the readings of the displacement sensors at both ends, and controls the oil pump control system to adjust the hydraulic press matrix 4 corresponding to the translational direction to lift outward until the absolute value of the displacement sensor reading decreases to within the third dead zone threshold.

[0035] The earthquake early warning and control system 6 calculates the target oil pressure value of each hydraulic chamber in the target hydraulic press matrix 4 and outputs a control signal to the oil pump control system. The oil pump control system is used to control the start and stop, speed and delivery direction of the corresponding oil pumps of the hydraulic presses and the oil pressure regulating valves of each hydraulic press, so that the oil pressure sensor detection value of each hydraulic press in the target hydraulic press matrix 4 is equal to the target oil pressure value.

[0036] Furthermore, after receiving and processing earthquake early warning information, the earthquake early warning and control system 6 calculates the target oil pressure value of each hydraulic press in the target hydraulic press matrix 4 and controls the oil pump control system to achieve precise adjustment of the local stiffness and damping parameters of the seismic bearings. During the epicenter process, the sensor system feeds back the detected values ​​to the earthquake early warning and control system 6 in real time, dynamically controlling the oil pump control system to adjust the seismic bearings to their optimal seismic resistance state in real time.

[0037] Therefore, when the earthquake early warning and control system 6 receives earthquake early warning information, it immediately initiates a pre-adjustment program. Combining historical earthquake data with parameters such as magnitude and epicentral distance from the current early warning information, it pre-sets the foundation oil pressure of the hydraulic press matrix 4 to prepare for the impending earthquake impact. During the aftershock phase, the sensor system continuously monitors changes in the structure's state. If parameters such as torque, tilt angle, or displacement exceed the corresponding dead zone threshold, the earthquake early warning and control system 6 quickly repeats the above adjustment process to ensure the structure remains stable throughout the entire earthquake event.

[0038] In addition, the seismic bearing also has a self-diagnostic function through the setting of the hydraulic pressure sensor. When any sensor in the sensor system has abnormal data or malfunction, and the value detected by the hydraulic pressure sensor is abnormal, the earthquake early warning and control system 6 can automatically identify the fault type and location by comparing the values ​​of the torque sensor, tilt sensor or displacement sensor with the hydraulic pressure sensor. After issuing a fault alarm through the alarm, it can remind maintenance personnel to deal with it in time, ensuring the long-term reliable operation of the entire seismic bearing system.

[0039] This application also discloses an active adaptive adjustment method for seismic bearings controlled by an earthquake early warning system. Based on the aforementioned seismic bearing controlled by an earthquake early warning system, the following technical solution is adopted: An active adaptive adjustment method for seismic-resistant bearings controlled by an earthquake early warning system includes the following steps: After receiving and processing earthquake early warning information, the earthquake early warning and control system 6 calculates the damping force required by the structure, converts it into the target oil pressure value of each hydraulic press in the target hydraulic press matrix 4, and sends the control signal to the oil pump control system. The oil pump control system controls the corresponding hydraulic press in the corresponding hydraulic press matrix 4 to work. The torque sensor, tilt sensor and displacement sensor in the sensor system monitor the structural status in real time and feed back the detection signals to the earthquake early warning and control system 6; The earthquake early warning and control system 6 compares the detected values ​​of the sensor system with the preset values, controls the oil pump control system to make corrections, and maintains the structural state in the preset state.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seismic-resistant bearing controlled by an earthquake early warning system, comprising a bearing base plate, characterized in that, The support base plate is provided with: There are two lateral support plates, which are arranged vertically and parallel to each other. The horizontal bottom plate and the horizontal top plate are arranged horizontally parallel and spaced apart, and are located between the two lateral support plates; The upper sliding swing seat and the lower sliding swing seat are respectively fixed to the horizontal top plate and the horizontal bottom plate and are located on opposite sides of the two; The central slider is located between the upper sliding base and the lower sliding base; The hydraulic press matrix has four groups distributed on the two opposite side walls of the two lateral support plates, and each group corresponds independently to one of the two opposite side walls of the upper sliding swing seat and the lower sliding swing seat. An oil pump control system is used to control the operation of one or more oil presses in the hydraulic press matrix. An earthquake early warning and control system is used to receive earthquake information and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix. as well as Sensor system, comprising: Torque sensor, used to measure the magnitude and direction of the torque subjected to a structure; When the absolute value of the torque sensor reading is greater than the first dead zone threshold, the earthquake early warning and control system determines the torque direction based on the readings of the torque sensors on the left and right sides, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the torque direction to lift outward until the absolute value of the torque sensor reading is reduced to within the first dead zone threshold.

2. The seismic bearing controlled by the earthquake early warning system according to claim 1, characterized in that, The upper sliding pendulum seat, the central slider, and the lower sliding pendulum seat together form a friction pendulum support, which is used to provide initial stiffness and damping. The upper and lower ends of the central slider can slide relative to the upper and lower sliding pendulum seats.

3. The seismic bearing controlled by the earthquake early warning system according to claim 1, characterized in that, The sensor system also includes: Tilt sensors are used to measure the tilt angle and direction of a structure; Displacement sensors are used to measure the horizontal displacement of a structure; and Oil pressure sensors are used to monitor the oil pressure of each hydraulic press in the hydraulic press matrix in real time; The earthquake early warning and control system is configured to receive earthquake information and sensor system detection information, and control the oil pump control system to adjust the local damping and stiffness of the corresponding hydraulic press matrix.

4. The seismic bearing controlled by the earthquake early warning system according to claim 3, characterized in that, When the absolute value of the tilt sensor reading is greater than the second dead zone threshold, the earthquake early warning and control system determines the tilt direction based on the readings of the tilt sensors on the upper and lower sides, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the tilt direction to lift outward until the tilt sensor reading approaches 0°.

5. A seismic-resistant bearing controlled by an earthquake early warning system according to claim 3, characterized in that, When the absolute value of the displacement sensor reading is greater than the third dead zone threshold, the earthquake early warning and control system determines the translational direction based on the readings of the displacement sensors at both ends, and controls the oil pump control system to adjust the hydraulic press matrix corresponding to the translational direction to lift outward until the absolute value of the displacement sensor reading decreases to within the third dead zone threshold.

6. The seismic bearing controlled by the earthquake early warning system according to claim 3, characterized in that, The earthquake early warning and control system calculates the target oil pressure value of each hydraulic press in the target hydraulic press matrix and outputs a control signal to the oil pump control system. The oil pump control system is used to control the start / stop, speed and delivery direction of the corresponding oil pumps of the hydraulic presses and the oil pressure regulating valves of each hydraulic press, so that the oil pressure sensor detection value of each hydraulic press in the target hydraulic press matrix is ​​equal to the target oil pressure value.

7. A seismic-resistant bearing controlled by an earthquake early warning system according to claim 6, characterized in that, After receiving and processing earthquake early warning information, the earthquake early warning and control system calculates the target oil pressure value of each hydraulic press in the target hydraulic press matrix and controls the oil pump control system to achieve the effect of accurately adjusting the local stiffness and damping parameters of the seismic support.

8. The seismic bearing controlled by the earthquake early warning system according to claim 1, characterized in that, The horizontal base plate is fixedly connected to the support base plate, and the upper sliding swing seat is provided with a limit baffle to prevent the swing displacement from exceeding the limit and causing the device to fail.

9. An active adaptive adjustment method for seismic bearings controlled by an earthquake early warning system, based on a seismic bearing controlled by an earthquake early warning system as described in any one of claims 3-7, characterized in that, Includes the following steps: After receiving and processing earthquake early warning information, the earthquake early warning and control system calculates the damping force required by the structure, converts it into the target oil pressure value of each hydraulic press in the target hydraulic press matrix, and sends the control signal to the oil pump control system. The oil pump control system controls the corresponding hydraulic press in the corresponding hydraulic press matrix to work. The torque sensor, tilt sensor, and displacement sensor in the sensor system monitor the structural status in real time and feed back the detection signals to the earthquake early warning and control system. The earthquake early warning and control system compares the detected values ​​of the sensor system with the preset values, and controls the oil pump control system to make corrections and maintain the structural state in the preset state.

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