A single-column pier bridge roll monitoring system based on finite element simulation

Abstract

The present invention discloses a roll monitoring system for a single-column pier bridge based on finite element simulation, comprising: a data acquisition unit, used to obtain the characteristics of the traffic flow on the bridge and determine the vehicle load loading conditions of the finite element model; a finite element simulation unit, used to establish a finite element model of the single-column pier bridge, analyze the displacements on both sides of the bridge body, and determine the displacement threshold; a displacement detection unit, using a displacement sensor to detect the actual displacements on both sides of the bridge body, a controller receives the displacement detection signal to determine whether both sides of the bridge body are vacant, and evaluates the roll tendency of the bridge body. The present invention adopts a finite element simulation method, based on the actual traffic flow characteristics on the bridge, to load the bridge body with vehicle loads, determine the displacement threshold of the bridge body, improve the accuracy of the finite element simulation, provide a basis for judging the roll tendency of the bridge body, and further improve the safety and roll prevention capability of the single-column pier bridge.

Description

Technical Field

[0001] The present invention relates to the technical field of finite element simulation, and more specifically, to a single-column pier bridge roll monitoring system based on finite element simulation. Background Art

[0002] The single-column pier bridge is a common reinforced concrete bridge structure, which is mainly composed of a pier, a bridge body and a bridge deck. In bridge construction, the single-column pier bridge structure not only has a beautiful appearance, but also has the advantages of small space occupation and wide field of vision. It is widely used in projects such as urban overpasses and highway interchange ramp bridges. In the existing single-column pier structure, the bridge body is connected to the pier through a single support point in the middle. The bridge body is in a single-point stress state. When overload and unbalanced load occur on the bridge, the bridge body is prone to imbalance, lateral deformation or even overall overturning.

[0003] Traditional bridge roll monitoring methods often rely on on-site field measurements, which are unable to detect the displacement on both sides of the bridge body in a timely manner. In addition, based on the measured displacement, the roll trend of the bridge body cannot be effectively evaluated, and there is a lack of judgment basis.

[0004] In the prior art, such as the Chinese patent with application number 202211162257.8, a single-column pier bridge overturning monitoring device based on microwave radar is disclosed, including: a pier column and a monitoring component, etc.; the upper outer side of the pier column is connected to a monitoring component. The shortest distance from the bridge body to the first L-shaped block is monitored in real time by two radar components to obtain two distance values ​​of the same size. When the bridge body tilts, the two monitored distance values ​​will change, and the bridge body will tilt to the side where the distance value decreases. When the distance value changes greatly, it means that the inclination angle of the bridge body is too large, that is, the bridge body is at risk of overturning. However, when the bridge is at risk of overturning in this device, the distance change threshold is difficult to determine, and there is a lack of judgment basis.

[0005] Therefore, it is necessary to propose a single-column pier bridge roll monitoring system based on finite element simulation to at least partially solve the problems existing in the prior art. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] In order to at least partially solve the above problems, the present invention provides a single-column pier bridge roll monitoring system based on finite element simulation, comprising:

[0008] A data acquisition unit, used to obtain the characteristics of traffic flow on the bridge and determine the vehicle load loading conditions of the finite element model;

[0009] Finite element simulation unit, used to establish the finite element model of the single-column pier bridge, analyze the displacement on both sides of the bridge body, and determine the displacement threshold;

[0010] The displacement detection unit uses a displacement sensor to detect the actual displacement on both sides of the bridge body. The controller receives the displacement detection signal to determine whether the two sides of the bridge body are empty and evaluate the roll trend of the bridge body.

[0011] The reinforcement unit is used to reinforce the supports on both sides of the bridge body to reduce the roll of the bridge body.

[0012] Preferably, the data acquisition unit obtains the characteristics of the traffic flow on the bridge, specifically: using a camera to collect traffic data passing over the bridge within a preset time period, including the number of vehicles, vehicle models, and vehicle positions, and statistically analyzing and determining the vehicle load conditions on the bridge body, including the load and position of the vehicle, as the vehicle load loading conditions of the finite element model.

[0013] Preferably, when performing calculations, the finite element simulation unit applies loads to the finite element model of the single-column pier bridge, specifically including permanent loads and variable loads. The permanent loads include the structural deadweight, creep shrinkage and support settlement of the bridge body. The variable loads include temperature loads and vehicle loads. The temperature load is set according to the bridge construction area and environment.

[0014] Preferably, when the finite element simulation unit performs calculations, the influence factor of the permanent load is set to 0.42, and the influence factor of the variable load is set to 0.58.

[0015] Preferably, the reinforcement unit comprises:

[0016] The first reinforcement plate and the second reinforcement plate are hinged at the ends, the first reinforcement plate is connected to the side of the pier, the second reinforcement plate is connected to the side of the bridge body, the angle between the first reinforcement plate and the second reinforcement plate is adjustable, a hydraulic support assembly is hinged on the outer side of the first reinforcement plate, a plurality of limit support grooves are opened on the outer side of the second reinforcement plate, and the top end of the hydraulic support assembly is vertically supported in the limit support groove.

[0017] Preferably, the side end of the first reinforcement plate is connected to a platform and a lower support rod, the hydraulic support assembly is hinged above the platform, and the lower support rod is obliquely supported below the outer end of the platform.

[0018] Preferably, the hydraulic support assembly includes a first support unit and a second support unit, the first support unit includes: a hydraulic cylinder 1 and a hydraulic rod 1, the bottom end of the hydraulic cylinder 1 is hinged above the platform, and the top end of the hydraulic rod 1 is connected to the second support unit and extends into the limit support groove.

[0019] Preferably, the second supporting unit comprises:

[0020] Hydraulic cylinder 2 and hydraulic rod 2, hydraulic cylinder 2 is arranged in the storage groove at the top end of hydraulic rod 1, and the output end of hydraulic rod 2 is connected with a linkage plate moving along the length direction of hydraulic rod 1;

[0021] A guide slideway is provided at the top of a hydraulic rod and arranged outside the receiving groove. The linkage plate passes through the guide slideway and is slidably connected thereto. A spring is connected between the top of the linkage plate and the guide slideway.

[0022] The limit plate is connected to the top of the linkage plate and protrudes a hydraulic rod, and the top surface of the limit plate is set as an arc surface adapted to the limit support groove.

[0023] Preferably, the balancing assembly is rotatably connected to both ends of the linkage plate, and the balancing assembly includes:

[0024] Side end rods, the side end rods are connected to both sides of a top end of the hydraulic rod;

[0025] The lower balancing rod is hinged at both side ends of the linkage plate, an end slot is provided at the top of the lower balancing rod, a telescopic rod 1 is slidably connected in the end slot, and a spring is connected between the telescopic rod 1 and the end slot.

[0026] Preferably, the balancing component further comprises:

[0027] An upper balancing rod, one end of which is rotatably connected to the side end rod through a rotating shaft, a sliding cavity is provided at the other end of the upper balancing rod, a telescopic rod 2 is slidably connected in the sliding cavity, a spring is connected between the telescopic rod 2 and the sliding cavity, and the middle part of the upper balancing rod is hinged with the top end of the telescopic rod 1;

[0028] The balance wheel is rotatably connected to the second top end of the telescopic rod and is higher than the limit plate.

[0029] Preferably, a stop assembly is connected inside the side end rod, and the rotating shaft passes through the center of the stop assembly. The stop assembly includes:

[0030] A stop ring, which is connected to the side end rod and is concentrically arranged on the outside of the rotating shaft;

[0031] The slip ring is concentrically arranged on the inner side of the stop ring, and two protrusions are connected to the side end of the slip ring, the protrusions are slidably connected to the inner wall of the stop ring, and a plurality of circular holes are opened on the slip ring;

[0032] A stop block is slidably connected in the circular hole, and a spring is connected between one end of the stop block and the inner wall of the stop ring, and the other end of the stop block is flush with the inner wall of the sliding ring;

[0033] A wedge block, wherein a plurality of wedge blocks are connected to the inner wall of the stop ring and arranged on one side of the spring, and the wedge surfaces of the plurality of wedge blocks are respectively in contact with the end of the stop block.

[0034] Preferably, the stop assembly further comprises:

[0035] A lug, the lug is connected to the outside of the stop ring and arranged close to the convex block, and a cavity is provided in the lug;

[0036] A transmission block is slidably connected in the lug cavity, a spring is connected between the transmission block and the inner wall of the lug, a connecting rod is hinged between the transmission block and the lug, and a groove for the connecting rod to rotate is provided on the lug and the stop ring;

[0037] A pneumatic box is connected to a top end of a hydraulic rod and arranged above a guide slide. A pneumatic piston is slidably connected inside the pneumatic box. The piston rod of the pneumatic piston extends into the guide slide. The upper part of the pneumatic box is connected to a side of the lug cavity away from the protrusion through a pipeline.

[0038] Compared with the prior art, the present invention has at least the following beneficial effects:

[0039] The present invention provides a single-column pier bridge roll monitoring system based on finite element simulation. The finite element simulation method is used to load the bridge body with vehicle loads based on the actual traffic flow characteristics on the bridge, and the displacement threshold of the bridge body is determined, thereby improving the accuracy of the finite element simulation, providing a basis for judging the roll trend of the bridge body, and further improving the safety and anti-roll capability of the single-column pier bridge.

[0040] The present invention describes a single-column pier bridge roll monitoring system based on finite element simulation. Other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by technical personnel in the field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0042] Figure 1 It is a structural schematic diagram of a reinforcement unit in a single-column pier bridge rollover monitoring system based on finite element simulation according to the present invention;

[0043] Figure 2 It is a schematic diagram of the connection structure between the reinforcement unit and the bridge in the present invention;

[0044] Figure 3 is a schematic structural diagram of a second reinforcement plate in the reinforcement unit of the present invention;

[0045] Figure 4 It is a structural schematic diagram of the hydraulic support assembly in the reinforcement unit of the present invention;

[0046] Figure 5 It is a schematic diagram of the cross-sectional structure of the top of the hydraulic support assembly in the reinforcement unit of the present invention;

[0047] Figure 6 It is a structural schematic diagram of the upper balance bar in the reinforcement unit of the present invention;

[0048] Figure 7 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at center A;

[0049] Figure 8 It is a schematic diagram of the cross-sectional structure of the stop assembly in the present invention.

[0050] In the figure: 1. first reinforcement plate; 2. second reinforcement plate; 3. column pier; 4. bridge body; 5. hydraulic support assembly; 6. limit support groove; 7. platform; 8. lower support rod; 9. pressure sensor; 11. hydraulic cylinder 1; 12. hydraulic rod 1; 13. hydraulic cylinder 2; 14. hydraulic rod 2; 15. storage groove; 16. linkage plate; 17. guide slide; 18. spring 1; 19. limit plate; 21. side end rod; 22. lower balance rod; 23. end groove; 24. telescopic rod 1; 25. upper balance rod; 26. rotating shaft; 27. sliding cavity; 28. telescopic rod 2; 29. ​​balance wheel; 41. stop ring; 42. slip ring; 43. bump; 44. round hole; 45. stop block; 46. wedge block; 47. lug; 48. transmission block; 49. connecting rod; 50. pneumatic box; 51. pneumatic piston. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0052] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0053] Example 1

[0054] The present invention provides a single-column pier bridge roll monitoring system based on finite element simulation, comprising:

[0055] A data acquisition unit, used to obtain the characteristics of traffic flow on the bridge and determine the vehicle load loading conditions of the finite element model;

[0056] A finite element simulation unit is used to establish a finite element model of a single-column pier bridge, analyze the displacements on both sides of the bridge body 4, and determine a displacement threshold;

[0057] The displacement detection unit uses a displacement sensor to detect the actual displacement of both sides of the bridge body 4. The controller receives the displacement detection signal to determine whether both sides of the bridge body 4 are empty and evaluate the roll trend of the bridge body 4.

[0058] The reinforcement unit is used to reinforce the supports on both sides of the bridge body 4 to reduce the roll of the bridge body 4.

[0059] The working principle and beneficial effects of the above technical solution are:

[0060] When a single-column pier bridge rollover monitoring system based on finite element simulation is used, the displacement threshold is determined through finite element simulation. First, the data acquisition unit is used to monitor the characteristics of the traffic flow on the bridge in real time, and the vehicle load conditions passing through the bridge are obtained, and this is used as the vehicle load loading condition in the finite element simulation. In the simulation software, according to the actual bridge structure, the finite element mesh model and connection nodes of the single-column pier bridge are constructed, including the bridge body 4, the column pier 3 and other structures, and the material parameters of the finite element mesh model are set according to the actual bridge material; the finite element model of the bridge body 4 is deflected by a preset angle, and the determined vehicle load conditions are applied to the current finite element model, and the displacement of the bridge body 4 is calculated. If the bridge body 4 is displaced or unstable at this time, the displacement of the two sides of the bridge body 4 corresponding to the finite element model under this deflection angle is set as the displacement threshold, that is, when the displacement on both sides of the bridge body 4 exceeds the threshold, the bridge body 4 has a rollover tendency. Displacement sensors are set on both sides of the bridge body 4 to detect the displacement of both sides of the bridge body 4 when driving, and the actual upward displacement detected is compared with the preset displacement threshold. When the preset displacement threshold is exceeded, it indicates that the bridge body 4 is vacant on this side and has a tendency to tilt, and the bridge traffic needs to be blocked and repaired. At the same time, a reinforcement unit is set to support both sides of the bridge body 4 to prevent the bridge body 4 from tilting, and can also adjust its posture when the bridge body 4 tilts.

[0061] The present invention provides a single-column pier bridge roll monitoring system based on finite element simulation. The finite element simulation method is adopted to load the bridge body 4 with vehicle loads based on the actual traffic flow characteristics on the bridge, and the displacement threshold of the bridge body 4 is determined, thereby improving the accuracy of the finite element simulation, providing a basis for judging the roll trend of the bridge body 4, and further improving the safety and anti-roll capability of the single-column pier bridge.

[0062] Based on the above-mentioned embodiment 1, the data acquisition unit obtains the characteristics of the traffic flow on the bridge, specifically: using a camera to collect traffic data passing over the bridge within a preset time period, including the number of vehicles, vehicle models, and vehicle positions, and statistically analyzing and determining the vehicle load conditions on the bridge body, including the load and position of the vehicle, as the vehicle load loading conditions of the finite element model.

[0063] The data acquisition unit obtains vehicle images, identifies and classifies vehicle models, and estimates the vehicle weight and determines the vehicle load condition based on the maximum load allowed for each type of vehicle.

[0064] When performing calculations, the finite element simulation unit applies loads to the finite element model of the single-column pier bridge, including permanent loads and variable loads. The permanent loads include the structural deadweight, creep shrinkage and support settlement of the bridge body 4. The variable loads include temperature loads and vehicle loads. The temperature load is set according to the bridge construction area and environment.

[0065] When the finite element simulation unit performs calculations, the influence factor of the permanent load is set to 0.42, and the influence factor of the variable load is set to 0.58.

[0066] When a single-column pier bridge is in use, it is subject to the combined effects of permanent loads and variable loads. When applying the load, it is necessary to comprehensively consider the effects of the two parts of the load and assign influencing factors to them. The variable load has a greater impact during loading. Based on a large amount of design data and measured data of the bridge, the influence factor of the permanent load is set to 0.42, and the influence factor of the variable load is set to 0.58, and comprehensive loading is performed when applying the load.

[0067] Example 2

[0068] like Figure 1-3 As shown, on the basis of the above-mentioned embodiment 1, a first reinforcement plate 1 and a second reinforcement plate 2 are hinged at the ends, the first reinforcement plate 1 is connected to the side of the pier 3, the second reinforcement plate 2 is connected to the side of the bridge body 4, the angle between the first reinforcement plate 1 and the second reinforcement plate 2 is adjustable, a hydraulic support assembly 5 is hinged on the outer side of the first reinforcement plate 1, and a plurality of limit support grooves 6 are opened on the outer side of the second reinforcement plate 2, and the top end of the hydraulic support assembly 5 is vertically supported in the limit support groove 6.

[0069] The working principle and beneficial effects of the above technical solution are:

[0070] When the reinforcement unit is in use, first fix the first reinforcement plate 1 to the side of the pier 3 by screws and pins, then rotate the second reinforcement plate 2 to adjust the angle so that the angle between the first reinforcement plate 1 and the second reinforcement plate 2 is equal to the angle between the pier 3 and the bridge body 4, then fix the second reinforcement plate 2 to the inclined surface on one side of the bridge body 4 by screws and pins, then rotate the hydraulic support assembly 5 so that the hydraulic support assembly 5 is close to vertical to the second reinforcement plate 2, select the limit support groove 6 opposite to the hydraulic support assembly 5, finally start the hydraulic support assembly 5 to extend, and abut the top end of the hydraulic support assembly 5 against the limit support groove 6 to support the second reinforcement plate 2.

[0071] The hydraulic support assembly 5 is vertically arranged to the second reinforcement plate 2, so that the support force provided by the hydraulic support assembly 5 can be loaded in a direction perpendicular to the second reinforcement plate 2, thereby improving the utilization rate of the support force and achieving a better support and reinforcement effect.

[0072] A plurality of limit support grooves 6 are arranged on the second reinforcement plate 2. When the bridge body 4 tilts during the support process and causes the angle of the second reinforcement plate 2 to change, the limit support grooves 6 can limit the top of the hydraulic support assembly 5 to prevent the top of the hydraulic support assembly 5 from sliding on the second reinforcement plate 2 and causing support failure.

[0073] Through the above-mentioned structural design, two relatively rotating reinforcement plates are used to connect the pier 3 and the bridge body 4. It can be adjusted according to the different side inclination angles of the bridge column 4, thereby improving the application range of the device. By arranging the hydraulic support assembly 5 to vertically support the second reinforcement plate 2, the utilization efficiency of the supporting force is improved, and the side of the bridge body 4 is reinforced, thereby effectively improving the anti-overturning effect of the device on the bridge.

[0074] Example 3

[0075] like Figure 1 , 2 As shown, based on the above-mentioned embodiment 2, the side end of the first reinforcement plate 1 is connected to the platform 7 and the lower support rod 8, the hydraulic support assembly 5 is hinged above the platform 7, and the lower support rod 8 is obliquely supported below the outer end of the platform 7.

[0076] The working principle and beneficial effects of the above technical solution are:

[0077] A platform 7 is arranged at the side end of the first reinforcement plate 1, and the platform 7 provides support for the bottom end of the hydraulic support assembly 5. The lower support rod 8 is obliquely arranged below the platform 7 to support the platform 7, thereby improving the connection stiffness of the platform and ensuring the stability of the bottom of the hydraulic support assembly 5.

[0078] By symmetrically setting two groups of reinforcement units, the two sides of the bridge body 4 are supported and reinforced respectively. When the displacement detection unit detects that the actual displacement of any side reaches the displacement threshold, the hydraulic support components 5 on both sides are started, the hydraulic support components 5 on the side of the downward displacement are extended, and the hydraulic support components 5 on the side of the upward displacement are shortened, and the angle of the second reinforcement plate 2 is adjusted to restore the bridge body 4 to a balanced state. According to the displacement detection results, the overturning state of the bridge is quickly identified, the angle of the second reinforcement plate 2 is adjusted in time, the angle of the bridge body 4 is adjusted, and the support of the bridge body 4 is reset to a balanced state to avoid overturning.

[0079] Example 4

[0080] like Figure 4 , 5As shown, based on the above-mentioned embodiment 3, the hydraulic support assembly 5 includes a first support unit and a second support unit, and the first support unit includes: a hydraulic cylinder 11 and a hydraulic rod 12, the bottom end of the hydraulic cylinder 11 is hinged above the platform 7, and the top end of the hydraulic rod 12 is connected to the second support unit and extends into the limit support groove 6.

[0081] The second supporting unit comprises:

[0082] Hydraulic cylinder 2 13 and hydraulic rod 2 14, hydraulic cylinder 2 13 is arranged in the storage groove 15 at the top of hydraulic rod 12, and the output end of hydraulic rod 2 14 is connected to a linkage plate 16 that moves along the length direction of hydraulic rod 12;

[0083] A guide slide 17 is provided at the top of the hydraulic rod 12 and arranged outside the receiving groove 15. The linkage plate 16 passes through the guide slide 17 and is slidably connected thereto. A spring 18 is connected between the top of the linkage plate 16 and the guide slide 17.

[0084] The limiting plate 19 is connected to the top of the linkage plate 16 and protrudes from the hydraulic rod 12 . The top surface of the limiting plate 19 is set as an arc surface that is adapted to the limiting support groove 6 .

[0085] The working principle and beneficial effects of the above technical solution are:

[0086] The hydraulic support assembly 5 includes a first support unit and a second support unit. When the hydraulic support assembly 5 is used, the first support unit is first started, and the hydraulic rod 12 in the hydraulic cylinder 11 is extended until the balancing wheel 29 of the balancing assembly contacts with the limit support groove 6. A pressure sensor is connected to the balancing wheel 29. When the pressure sensor on the balancing wheel 29 detects a pressure signal, it indicates that the balancing wheel 29 contacts with the limit support groove 6, and the limit plate 19 can face the limit support groove 6. At this time, the controller stops the first support unit, and the hydraulic rod 12 stops extending. Then, the second support unit is started, and the hydraulic rod 2 14 in the hydraulic cylinder 2 13 is extended, driving the linkage plate 16 and the limit plate 19 to move. The limit plate 19 enters the limit support groove 6 to support the second reinforcement plate 2. The arc surface on the top of the limit plate 19 is adapted to the inner surface of the limit support groove 6.

[0087] Through the above-mentioned structural design, the hydraulic support assembly 5 is set as two hydraulically driven support units, and a step-by-step feeding method is adopted. First, the position of the limit plate 19 is adjusted by the first support unit so that the limit plate 19 corresponds to the limit support groove 6, and then the second support unit is started to abut the limit plate 19 against the limit support groove 6 to achieve effective support for the second reinforcement plate 2. This feeding method can ensure the relative position of the limit plate 19 and the limit support groove 6, reduce the impact of the hydraulic structure on the second reinforcement plate 2 during support reinforcement, and can perform micro-adjustments through the second support unit when the bridge body 4 undergoes a slight deflection, thereby expanding the applicable scenarios of the device.

[0088] Example 5

[0089] like Figure 5 , 6 As shown, based on the above-mentioned embodiment 4, the balancing component is rotatably connected to both ends of the linkage plate 16, and the balancing component includes:

[0090] Side end rods 21, the side end rods 21 are connected to both sides of the top of the hydraulic rod 12;

[0091] A lower balancing rod 22, the lower balancing rod 22 is hinged to both side ends of the linkage plate 16, an end slot 23 is provided at the top of the lower balancing rod 22, a telescopic rod 24 is slidably connected in the end slot 23, and a spring is connected between the telescopic rod 24 and the end slot 23;

[0092] An upper balancing rod 25, one end of which is rotatably connected to the side end rod 21 through a rotating shaft 26, and a sliding cavity 27 is provided at the other end of the upper balancing rod 25, a telescopic rod 28 is slidably connected in the sliding cavity 27, and a spring is connected between the telescopic rod 28 and the sliding cavity 27, and the middle part of the upper balancing rod 25 is hinged to the top end of the telescopic rod 1 24;

[0093] The balance wheel 29 is rotatably connected to the top of the telescopic rod 28 and is higher than the limiting plate 19 .

[0094] The working principle and beneficial effects of the above technical solution are:

[0095] When the bridge is reinforced, the contact area between the limit plate 19 and the limit support groove 6 is small. The limit plate 19 is subjected to a large pressure during support reinforcement, which can easily cause the hydraulic support assembly 5 to fail, or cause imbalance along the length direction of the limit support groove 6, affecting the support reinforcement effect of the device. By setting the balancing assembly, in the initial position, the two upper balancing rods 25 are arranged opposite to each other and close to the limit plate 19 at the same time, and the balancing wheel 29 at the top of the telescopic rod 28 is higher than the limit plate 19. When the balancing wheel 29 of the balancing assembly contacts the limit support groove 6, the second supporting unit is started, and the hydraulic rod 2 14 in the hydraulic cylinder 13 extends to drive the linkage plate 16 and the limit plate 19 to move. The linkage plate 16 pushes the lower balancing rod 22 and the telescopic rod 1 24 to move upward, and the upper parts of the lower balancing rod 22 and the telescopic rod 1 24 are inclined away from the limit plate 19, so that the lower balancing rod 22 and the telescopic rod 1 24 are rotated and unfolded outwardly, driving the upper balancing rod 25 to rotate and unfold outwardly in the direction away from the limit plate 19, and the telescopic rod 28 slides in the sliding cavity 27, so that the total length of the upper balancing rod 25 and the telescopic rod 28 is shortened, and under the action of the spring, the balancing wheel 29 is always in contact with the limit support groove 6. When the limit plate 19 moves to abut against the limit support groove 6 , the upper balance rod 25 and the second telescopic rod 28 rotate to a state where the upper parts are tilted outward, and the balance wheel 29 at the top of the second telescopic rod 28 abuts against the surface of the limit support groove 6 .

[0096] Through the above-mentioned structural design, the second reinforcement plate 2 is auxiliary supported by the balancing wheel 29 arranged at the top of the balancing assembly, thereby reducing the stress concentration on the limit plate 19, increasing the contact area between the hydraulic support assembly 5 and the limit support groove 6, and improving the balance of both sides of the hydraulic support assembly 5, making it difficult to deflect and lose balance along the length direction of the limit support groove 6, and under the action of the spring, the balancing wheel 29 maintains pressure on the limit support groove 6, ensuring that the auxiliary support is more effective and improving the support and reinforcement effect of the device.

[0097] Example 6

[0098] like Figure 7 , 8 As shown, based on the above-mentioned embodiment 5, a stop assembly is connected inside the side end rod 21, and the rotating shaft 26 passes through the center of the stop assembly. The stop assembly includes:

[0099] A stop ring 41, which is connected to the side end rod 21 and is concentrically arranged outside the rotating shaft 26;

[0100] The slip ring 42 is concentrically arranged inside the stop ring 41, and two protrusions 43 are connected to the side ends of the slip ring 42, and the protrusions 43 are slidably connected to the inner wall of the stop ring 41, and a plurality of circular holes 44 are opened on the slip ring 42;

[0101] A stop block 45, which is slidably connected in the circular hole 44, and a spring is connected between one end of the stop block 45 and the inner wall of the stop ring 41, and the other end of the stop block 45 is flush with the inner wall of the sliding ring 42. The stop block 45 is provided with a latching tooth on one side of the rotating shaft 26 and on the rotating shaft 26;

[0102] Wedge blocks 46, multiple wedge blocks 46 are connected to the inner wall of the stop ring 41 and arranged on one side of the spring, and the wedge surfaces of the multiple wedge blocks 46 are respectively in contact with the ends of the stop blocks 45;

[0103] A lug 47, the lug 47 is connected to the outside of the stop ring 41 and is arranged close to the protrusion 43, and a cavity is provided in the lug 47;

[0104] Transmission block 48, the transmission block 48 is slidably connected in the lug 47 cavity, and a spring is connected between the transmission block 48 and the inner wall of the lug 47, a connecting rod 49 is hinged between the transmission block 48 and the lug 43, and a groove for the connecting rod 49 to rotate is provided on the lug 47 and the stop ring 41;

[0105] Pneumatic box 50, the pneumatic box 50 is connected to the top of the hydraulic rod 12 and arranged above the guide slide 17. A pneumatic piston 51 is slidably connected in the pneumatic box 50. The piston rod of the pneumatic piston 51 extends into the guide slide 17. The upper part of the pneumatic box 50 is connected to the side of the lug 47 cavity away from the protrusion 43 through a pipeline.

[0106] The working principle and beneficial effects of the above technical solution are:

[0107] When the linkage plate 16 moves upward and approaches the limit position, a section of the linkage plate 16 located in the guide slide 17 contacts the piston rod of the pneumatic piston 51 and pushes the pneumatic piston 51 to slide in the pneumatic box 50, squeezing the air in the upper part of the pneumatic box 50 to enter the cavity of the lug 47. The volume of the lug 47 cavity away from the protrusion 43 increases, pushing the transmission block 48 to slide in the lug 47 cavity. The transmission block 48 drives the protrusion 43 to slide on the inner wall of the stop ring 41 through the connecting rod 49, driving the slip ring 42 The stop ring 41 rotates counterclockwise relative to the stop block 45, so that the stop block 45 slides along the surface of the wedge block 46, and the wedge block 46 pushes the stop block 45 out of the circular hole 44, and the stop block 45 is pressed against the outside of the rotating shaft 26. The side of the stop block 45 close to the rotating shaft 26 and the side end of the rotating shaft 26 are provided with latching teeth, and the latching teeth of the stop block 45 mesh with the latching teeth of the rotating shaft 26, thereby fixing the rotating shaft 26, so that the position of the balancing assembly and the balancing wheel 29 does not change after the adjustment is completed, thereby ensuring the support angle and improving the stability of the device.

[0108] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0109] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A single-column pier bridge rollover monitoring system based on finite element simulation, characterized in that: include: A data acquisition unit, used to obtain the characteristics of traffic flow on the bridge and determine the vehicle load loading conditions of the finite element model; A finite element simulation unit is used to establish a finite element model of a single-column pier bridge, analyze the displacements on both sides of the bridge body (4), and determine a displacement threshold; A displacement detection unit, which uses a displacement sensor to detect the actual displacement of both sides of the bridge body (4); a controller receives the displacement detection signal to determine whether both sides of the bridge body (4) are empty, and evaluates the roll tendency of the bridge body (4); A reinforcement unit, used to reinforce the supports on both sides of the bridge body (4) to reduce the roll of the bridge body (4); The reinforcement unit includes: A first reinforcing plate (1) and a second reinforcing plate (2) are hinged at the ends, the first reinforcing plate (1) is connected to the side of the column pier (3), the second reinforcing plate (2) is connected to the side of the bridge body (4), the angle between the first reinforcing plate (1) and the second reinforcing plate (2) is adjustable, a hydraulic support assembly (5) is hinged on the outer side of the first reinforcing plate (1), a plurality of limit support grooves (6) are provided on the outer side of the second reinforcing plate (2), and the top end of the hydraulic support assembly (5) is vertically supported in the limit support groove (6); The side end of the first reinforcement plate (1) is connected to a platform (7) and a lower support rod (8), the hydraulic support assembly (5) is hinged above the platform (7), and the lower support rod (8) is obliquely supported below the outer end of the platform (7); The hydraulic support assembly (5) comprises a first support unit and a second support unit, wherein the first support unit comprises: a hydraulic cylinder (11) and a hydraulic rod (12), wherein the bottom end of the hydraulic cylinder (11) is hinged above the platform (7), and the top end of the hydraulic rod (12) is connected to the second support unit and extends into the limit support groove (6); The second supporting unit comprises: Hydraulic cylinder 2 (13) and hydraulic rod 2 (14), wherein hydraulic cylinder 2 (13) is arranged in a receiving groove (15) at the top end of hydraulic rod 1 (12), and the output end of hydraulic rod 2 (14) is connected with a linkage plate (16) that moves along the length direction of hydraulic rod 1 (12); A guide slideway (17), the guide slideway (17) is opened at the top end of the hydraulic rod (12) and arranged outside the receiving groove (15), the linkage plate (16) passes through the guide slideway (17) and is slidably connected thereto, and a spring (18) is connected between the top end of the linkage plate (16) and the guide slideway (17); The limiting plate (19) is connected to the top of the linkage plate (16) and protrudes from the hydraulic rod (12). The top surface of the limiting plate (19) is configured as an arc surface that matches the limiting support groove (6).

2. The finite element simulation-based single-column pier bridge rollover monitoring system according to claim 1 is characterized in that: The data acquisition unit obtains the characteristics of the traffic flow on the bridge, specifically: using a camera to collect traffic data passing over the bridge within a preset time period, including the number of vehicles, vehicle models, and vehicle positions, and statistically analyzing and determining the vehicle load conditions on the bridge body, including the load and position of the vehicle, as the vehicle load loading conditions of the finite element model.

3. The finite element simulation-based single-column pier bridge rollover monitoring system according to claim 2 is characterized in that: When performing calculations, the finite element simulation unit applies loads to the finite element model of the single-column pier bridge, specifically including permanent loads and variable loads. The permanent loads include the structural deadweight, creep shrinkage and support settlement of the bridge body (4); the variable loads include temperature loads and vehicle loads. The temperature load is set according to the bridge construction area and environment.

4. The finite element simulation-based single-column pier bridge rollover monitoring system according to claim 3 is characterized in that: When the finite element simulation unit performs calculations, the influence factor of the permanent load is set to 0.42, and the influence factor of the variable load is set to 0.

58.

5. The finite element simulation-based single-column pier bridge rollover monitoring system according to claim 1 is characterized in that: The balancing component is rotatably connected to both ends of the linkage plate (16), and the balancing component comprises: Side end rods (21), the side end rods (21) are connected to both sides of the top end of the hydraulic rod 1 (12); The lower balancing rod (22) is hinged to both side ends of the linkage plate (16), an end slot (23) is provided at the top end of the lower balancing rod (22), a telescopic rod (24) is slidably connected in the end slot (23), and a spring is connected between the telescopic rod (24) and the end slot (23).

6. The finite element simulation-based single-column pier bridge rollover monitoring system according to claim 5, characterized in that: The balancing components also include: An upper balancing rod (25), one end of which is rotatably connected to the side end rod (21) via a rotating shaft (26), a sliding cavity (27) is provided at the other end of the upper balancing rod (25), a second telescopic rod (28) is slidably connected in the sliding cavity (27), a spring is connected between the second telescopic rod (28) and the sliding cavity (27), and a middle portion of the upper balancing rod (25) is hinged to the top end of the first telescopic rod (24); A balance wheel (29) is rotatably connected to the top of the second telescopic rod (28) and is higher than the limiting plate (19).

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