CN108755390B - Active control system and control method for improving wind resistance of long-span bridge - Google Patents
Active control system and control method for improving wind resistance of long-span bridge Download PDFInfo
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- CN108755390B CN108755390B CN201810497199.1A CN201810497199A CN108755390B CN 108755390 B CN108755390 B CN 108755390B CN 201810497199 A CN201810497199 A CN 201810497199A CN 108755390 B CN108755390 B CN 108755390B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Abstract
The invention discloses an active control system and a control method for improving wind resistance of a long-span bridge, wherein the active control system comprises a guide plate and a central stabilizing plate which can rotate by corresponding angles according to changes of wind environments such as different wind attack angles, a wind environment signal is detected by a wind environment detection processor of the system and is transmitted to a central controller inside the system, the length of a hydraulic numerical control telescopic rod required to stretch and the angle of the guide plate and the angle of the central stabilizing plate required to rotate are obtained through conversion of an angle conversion program embedded in the central controller, then a length signal is transmitted to the hydraulic numerical control telescopic rod, and the rotation angles of the guide plate and the central stabilizing plate are realized through the corresponding length of the telescopic rod. Compared with the prior art, rotatable guide plate and central stabilizer plate enable gaseous reposition of redundant personnel, the streaming better along the bridge structures, can effectively improve the anti-wind performance of bridge under different wind environment, reduce the wind system vibration amplitude of bridge structures, improve the aerodynamic performance of bridge, improve the travelling comfort that the vehicle went on the bridge under the strong wind weather.
Description
Technical Field
The invention relates to an active control system and a control method for improving wind resistance of a long-span bridge, and belongs to the technical field of civil engineering.
Background
With the increasing traffic demand of people, the bridge construction is developed towards large span and light weight, and meanwhile, the problem of wind-induced vibration of the bridge is more prominent. The bridge has larger amplitude in a strong wind environment, so that the comfort of a running vehicle is greatly reduced, traffic transportation is hindered and even interrupted, and the development of a traffic economy zone is seriously influenced. Once a bridge is damaged due to wind damage, the consequences are very serious, and in addition, the wind damage of the bridge is more frequent than the earthquake damage, and the wind resistance stability problem of the large-span bridge becomes one of the non-negligible control factors in the bridge design.
At present, structural measures, mechanical measures and pneumatic measures are usually adopted to improve the wind resistance stability of a large-span bridge, the key point is that a reasonable section form and a structural system are adopted to improve the overall rigidity of the bridge, the aim of vibration reduction of the bridge is achieved through vibration isolation, energy consumption and other control measures, and reasonable pneumatic measures are selected to improve the pneumatic performance of the bridge structure on the basis.
Different main beam section appearances make the air produce different reposition of redundant personnel, the form of streaming when flowing through the main beam, and then change the size of the air force of acting on the bridge structures. The main beam pneumatic measure is that a member is added on the main beam to change the shape of the section of the main beam, so that the shape of airflow flowing through the section of the main beam is changed, and the aim of inhibiting wind-induced vibration of the bridge is fulfilled. The pneumatic measures generally adopted are: the main beam is provided with a groove, a blast nozzle, a flow guide plate, a central stabilizing plate, nicks on the surface of the inhaul cable and the like.
The guide plate is usually arranged in front of the air nozzle, so that the whole section of the main beam becomes more streamlined, and the pneumatic streaming state of the main beam can be improved. Meanwhile, additional pneumatic damping is generated when the main beam vibrates, so that the vibration amplitude of the main beam can be reduced; the central stabilizing plates are arranged in the middle of the upper part and the lower part of the main beam, so that the streaming state around the main beam can be improved, the drifting of the vortex along the surface of the main beam is hindered, and the wind resistance of the main beam is improved.
Although the wind resistance stability of the bridge can be improved by arranging the guide plates and the upper and lower central stabilizing plates, uncertain factors such as wind direction, wind speed and the like of a wind environment are more, wind-induced vibration forms of the bridge are various, various wind-induced vibration mechanisms are different, sometimes, one measure can inhibit one wind-induced vibration, the effect on the other wind-induced vibration is not large, and even opposite effects can be caused.
If the guide plate and the central stabilizing plate which can rotate corresponding angles according to the changes of the environments such as wind attack angles, wind speeds and the like monitored in real time are adopted, the gas can be adjusted to the optimal state along the diversion and the streaming of the bridge structure along with the changes of the wind environment, the problem of diversity of wind-induced vibration changes is effectively solved, and the smooth traffic in the strong wind environment can be ensured. The active control system adopted by the invention transmits signals by the central controller according to the wind environment measured by the wind environment detection processor, calculates the length of the hydraulic numerical control telescopic rod which needs to be extended or shortened and the angle of the guide plate and the central stabilizing plate which need to be rotated by an angle conversion program embedded in the central controller, starts the device in real time according to the requirement, receives the signals by the hydraulic numerical control telescopic rod and extends or shortens the corresponding length to realize the rotation of the guide plate and the central stabilizing plate, and finally carries out real-time detection by the angle sensors arranged on the guide plate and the central stabilizing plate to realize signal butt joint with the central controller to form a complete signal loop so as to ensure that the device can stably cope with the change of different wind environments, thereby improving the wind resistance stability of the large-span bridge under different wind environments.
Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.
Disclosure of Invention
The invention aims to provide a guide plate and a central stabilizing plate which can rotate by corresponding angles according to different wind environments measured in real time, and the guide plate and the central stabilizing plate which rotate by different angles under different wind attack angles and other environments can effectively improve the windward effect of buildings such as bridges and the like, so that gas can be effectively shunted and bypassed, and the wind resistance of the bridge is improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
an active control system for improving wind resistance of a large-span bridge comprises a fish mouth upper steel plate and a fish mouth lower steel plate which are arranged on the side part of the large-span bridge, wherein one end of the fish mouth upper steel plate is connected with the edge of an upper bridge deck of the large-span bridge, one end of the fish mouth lower steel plate is connected with the edge of a lower bridge deck of the large-span bridge, the other end of the fish mouth upper steel plate and the other end of the fish mouth lower steel plate are close to each other, and an outward movable guide plate and an adjusting mechanism for controlling the rotation and the movement of the movable guide plate are arranged between the fish mouth upper steel plate and the fish mouth lower steel plate; a wind environment detection processor is arranged on a bridge deck of the long-span bridge; the bridge deck of the long-span bridge is also provided with a pair of central hinges, a movable central stabilizing plate is arranged between the two central hinges, the central hinges are in a folded state, one part of the central hinges is fixedly attached to the bridge deck, the other part of the central hinges is attached to the movable central stabilizing plate, a central hydraulic numerical control telescopic rod is arranged between the movable central stabilizing plate and the bridge deck, and the central hydraulic numerical control telescopic rod is respectively hinged with the movable central stabilizing plate and the upper bridge deck; angle sensors are arranged on the movable guide plate and the movable central stabilizing plate.
As a further preferred scheme, adjustment mechanism includes the fixed plate, the fixed plate is located on the fish mouth between steel sheet and the fish mouth under the steel sheet, it is provided with fixed guide plate to pass the clearance between steel sheet and the fish mouth under the steel sheet on the fish mouth, the one end of fixed guide plate is fixed on the fixed plate, the upper and lower surface of the other end respectively is equipped with an industry heavy hinge, respectively install a movable guide plate on two industry heavy hinges, wherein lean on to be equipped with a hydraulic pressure numerical control telescopic link between the movable guide plate on upper portion and the steel sheet on the fish mouth, this hydraulic pressure numerical control telescopic link is articulated with movable guide plate and the steel sheet on the fish mouth respectively, lean on to be equipped with a hydraulic pressure numerical control telescopic link between movable guide plate and the steel sheet under the fish mouth of lower part, this.
As a further preferred scheme, the adjusting mechanism comprises a rotary bearing clamping outer ring, a rotary bearing inner ring and a rotary bearing rotating shaft, the rotary bearing clamping outer ring is fixedly arranged at the end part of the same side of the steel plate on the fish mouth and the steel plate under the fish mouth, the rotary bearing inner ring is positioned in the rotary bearing clamping outer ring, the rotary bearing rotating shaft is positioned between the rotary bearing clamping outer ring and the rotary bearing inner ring, the movable guide plate is arranged on the part of the rotary bearing inner ring exposed outside the rotary bearing clamping outer ring, a hydraulic numerical control telescopic rod is arranged between the movable guide plate and the steel plate under the fish mouth, and the hydraulic numerical control telescopic rod is respectively hinged with the movable guide plate and the steel plate under the fish mouth.
As further preferred scheme, the clearance between the steel sheet under activity guide plate runs through steel sheet and the fish mouth on the fish mouth between the steel sheet, the tip that the activity guide plate is located steel sheet and fish mouth under the fish mouth in the steel sheet and the fish mouth under the steel sheet be provided with hydraulic pressure numerical control telescopic link, hydraulic pressure numerical control telescopic link respectively with activity guide plate and fish mouth under the steel sheet articulated, the screens board that is used for fixing is installed to hydraulic pressure numerical control telescopic link's lateral part, the tip of steel sheet or the fish mouth under the steel sheet on the fish mouth and the part of activity guide plate contact are provided with wear-resistant rubber.
A control method of an active control system for improving wind resistance of a long-span bridge comprises the following steps:
the method comprises the following steps: the wind environment detection processor monitors the wind attack angle environment of the long-span bridge in real time, and a central controller is installed inside the wind environment detection processor;
step two: the wind environment detection processor transmits the monitored wind attack angle data to the central controller, the central controller converts the wind attack angle data into angle data required to rotate by the movable guide plate and the movable central stabilizing plate through an embedded angle conversion program, and the central controller converts the angle data into length data required to be respectively extended or shortened by the hydraulic numerical control telescopic rod and the central hydraulic numerical control telescopic rod;
step three: the central controller sends instructions to the hydraulic numerical control telescopic rod and the central hydraulic numerical control telescopic rod, the hydraulic numerical control telescopic rod drives the movable guide plate to rotate, and the central hydraulic numerical control telescopic rod drives the movable central stabilizing plate to rotate;
step four: after the movable guide plate and the movable central stabilizing plate rotate, actual rotating angles are detected through an angle sensor arranged on the movable guide plate and an angle sensor arranged on the movable central stabilizing plate respectively, and the actual rotating angles are fed back to the central controller for calibration.
Compared with the prior art, the active control system disclosed by the invention can respond to the changes of wind environments such as different wind attack angles by realizing the rotation of the guide plate and the central stabilizing plate, so that the gas at a tuyere, on a bridge deck, on a bridge tower and on other buildings can be better divided and detoured, the problem of wind-induced vibration caused by the change of a large-span bridge to different wind environments can be solved, the bridge can be in a more favorable wind-resistant state, the wind-resistant stability of the bridge is improved, the vehicle can have better driving comfort in the strong wind environment, and the smooth traffic in different wind environments can be ensured.
The guide plate and the central stabilizing plate need to be periodically trial-operated and maintained, and the aesthetic effect of the building structure can be changed by means of measures such as illumination, light, appearance change of structures such as bridges and the like, so that the appearance aesthetic feeling of the building structure is enhanced.
The guide plate and the central stabilizing plate can be folded by rotating corresponding angles when not in use, and the service life of the central stabilizing plate is prolonged.
Drawings
FIG. 1a is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 1b is a schematic view of an adjustment mechanism according to a first embodiment of the present invention;
FIG. 1c is a schematic structural view of an active central stabilizer plate;
FIG. 2a is a schematic structural diagram of a second embodiment of the present invention;
FIG. 2b is a schematic view of an adjustment mechanism according to a second embodiment of the present invention;
FIG. 3a is a schematic structural diagram of a third embodiment of the present invention;
FIG. 3b is a schematic view of an adjustment mechanism according to a third embodiment of the present invention;
FIG. 4a is a cross-section of the present active control system applied to a bridge tower;
FIG. 4b is a schematic view of a partial structure of the active control system applied to a bridge tower;
FIG. 5a is a cross section of the present active control system applied to a high-rise building;
FIG. 5b is a partial structural view of the active control system applied to a high-rise building;
101-a fish mouth upper steel plate, 102-a fish mouth lower steel plate, 2-a movable guide plate, 3-a fixed plate, 4-a fixed guide plate, 5-an industrial heavy hinge, 6-a hydraulic numerical control telescopic rod, 7-a wind environment detection processor, 8-a rotary bearing clamping outer ring, 9-a rotary bearing inner ring, 10-a rotary bearing rotating shaft, 11-a clamping plate, 12-wear-resistant rubber, 13-a central hinge, 14-a movable central stabilizing plate, 15-a central hydraulic numerical control telescopic rod, 16-an angle sensor, 17-a bridge tower main body and 18-a high-rise building.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The key point of the active control system provided by the invention lies in the connection and the matching among all the accessories, and the connection implementation mode and the related application among all the accessories are provided to further explain the active control system, the active control system for improving the wind resistance of the long-span bridge comprises an upper fish mouth steel plate 101 and a lower fish mouth steel plate 102 which are arranged at the side part of the long-span bridge, the upper fish mouth steel plate 101, the lower fish mouth steel plate 102 and a bridge main body form a fish mouth framework, one end of the fish mouth upper steel plate 101 is connected with the edge of an upper bridge deck of the large-span bridge, one end of the fish mouth lower steel plate 102 is connected with the edge of a lower bridge deck of the large-span bridge, the other end of the fish mouth upper steel plate 101 and the other end of the fish mouth lower steel plate 102 are close to each other, and an outward movable guide plate 2 and an adjusting mechanism for controlling the movable guide plate 2 to rotate and move are arranged between the fish mouth upper steel plate 101 and the fish mouth lower steel plate 102; and a wind environment detection processor 7 is arranged on the bridge deck of the long-span bridge.
As shown in fig. 1c, a pair of central hinges 13 is further arranged at the position of the upper bridge deck or the lower bridge deck of the large-span bridge, a movable central stabilizing plate 14 is arranged between the two central hinges 13, the movable central stabilizing plate 14 is parallel to the bridge along the bridge direction, the central hinge 13 is in a folded position with one part fixedly attached to the bridge deck and the other part attached to the movable central stabilizer 14, a central hydraulic numerical control telescopic rod 15 is arranged between the movable central stabilizing plate 14 and the bridge deck slab, the central hydraulic numerical control telescopic rod 15 is respectively hinged with the movable central stabilizing plate 14 and the upper bridge deck slab, the movable central stabilizing plate 14 is connected with the bridge deck slab through a central hinge 13, the wind environment detection processor 7 controls the telescopic movement of the central hydraulic numerical control telescopic rod 15, the swing angle of the movable central stabilizing plate 14 is adjusted, and the movable central stabilizing plate 14 is ensured to rotate in a stable state.
The first embodiment is as follows:
the overall structure of the first embodiment is shown in fig. 1a, and the structure of the adjusting mechanism is shown in fig. 1 b;
in fig. 1b, the wind environment detection processor 7 is installed on the bridge floor, and an angle conversion program is embedded in a central controller installed in the wind environment detection processor. The wind environment detection processor 7 determines the wind environment of the main beam in real time and transmits signals to the central controller, an angle conversion program in the central controller can be programmed in advance, so that the angle of the movable guide plate 2 and the movable central stabilizing plate 14 which need to rotate under different wind environments and the length of the hydraulic numerical control telescopic rod which needs to be extended or shortened can be converted and output in real time, the central controller sends out a signal starting device in real time, and the movable guide plate 2 and the movable central stabilizing plate 14 can be ensured to rotate to the corresponding angles.
The adjusting mechanism comprises a fixed plate 3, the fixed plate 3 is positioned between an upper fish mouth steel plate 101 and a lower fish mouth steel plate 102, a fixed guide plate 4 is arranged in a gap passing between the upper fish mouth steel plate 101 and the lower fish mouth steel plate 102, one end of the fixed guide plate 4 is fixed on the fixed plate 3, the upper surface and the lower surface of the other end are respectively provided with an industrial heavy hinge 5, two movable guide plates 2 are respectively arranged on the two industrial heavy hinges 5, a hydraulic numerical control telescopic rod 6 is arranged between the movable guide plate 2 close to the upper part and the upper fish mouth steel plate 101, the hydraulic numerical control telescopic rod 6 is respectively hinged with the movable guide plate 2 and the upper fish mouth steel plate 101, a hydraulic numerical control telescopic rod 6 is arranged between the movable guide plate 2 close to the lower part and the lower fish mouth steel plate 102, the hydraulic numerical control telescopic rod 6 is respectively hinged with the movable guide plate 2 and the lower fish mouth steel plate 102, in particular, adopt pin joint between hydraulic pressure numerical control telescopic link 6 and movable guide plate 2 and the fish mouth framework, guarantee that hydraulic pressure numerical control telescopic link 6 has displacement and rotational degree of freedom, movable guide plate 2 realizes rotating with angle regulation through the extension of hydraulic pressure numerical control telescopic link 6 or shortening. The movable guide plate 2 is connected with the fixed guide plate 4 through an industrial heavy hinge 5, and the fixed guide plate 4 is welded and fixed with the fish mouth framework through the fixed plate 3.
The two movable deflectors 2 in fig. 1b can be used individually to bring the bridge to the optimum aerodynamic conditions.
The movable guide plate 2 and the movable central stabilizing plate 14 can be folded by rotating corresponding angles under the condition of not using, thereby prolonging the service life of the movable guide plate and the movable central stabilizing plate
Example two:
the overall structure of the second embodiment is shown in fig. 2a, and the structure of the adjusting mechanism is shown in fig. 2 b;
the second embodiment is the same as the first embodiment in basic principle, and the signal transmission and accessory cooperation paths are as follows: the wind environment detection processor 7 → the hydraulic numerical control telescopic rod 6 → the movable deflector 2 → the angle sensor 16 → the wind environment detection processor 7; the wind environment detection processor 7 → the central hydraulic numerical control telescopic rod 15 → the movable central stabilizing plate 14 → the angle sensor 16 → the wind environment detection processor 7, and the specific connection and operation principle between the accessories are the same as those in the first embodiment, and are not described again.
The adjusting mechanism comprises a rotary bearing clamping outer ring 8, a rotary bearing inner ring 9 and a rotary bearing rotating shaft 10, wherein the rotary bearing clamping outer ring 8 is a semi-circular annular body, the rotary bearing inner ring 9 is of an annular structure, the rotary bearing inner ring 9 and the rotary bearing rotating shaft 10 are limited in the rotary bearing clamping outer ring 8, the rotary bearing inner ring 9 rotates in the rotary bearing clamping outer ring 8, the rotary bearing clamping outer ring 8 is fixedly arranged at the end part of the fish mouth on the same side of a steel plate 101 and a fish mouth lower steel plate 102, the rotary bearing inner ring 9 is positioned in the rotary bearing clamping outer ring 8, the rotary bearing rotating shaft 10 is positioned between the rotary bearing clamping outer ring 8 and the rotary bearing inner ring 9, a movable guide plate 2 is arranged on the part of the rotary bearing inner ring 9 exposed outside the rotary bearing clamping outer ring 8, a hydraulic numerical control telescopic rod 6 is arranged between the movable guide plate 2 and the fish mouth lower steel plate 102, the hydraulic numerical control telescopic rod 6 is respectively hinged with the movable guide plate 2 and the lower fishmouth steel plate 102, specifically, in embodiment 2, the rotation of the movable guide plate 2 is supported by the rotating bearing device, and the movable guide plate 2 is clamped. The rotary bearing device consists of a rotary bearing clamping outer ring 8, a rotary bearing inner ring 9 and a rotary bearing rotary shaft 10. The end parts of the rotary bearing clamping outer ring 8, the upper fish mouth steel plate 101 and the lower fish mouth steel plate 102 are welded to fix the whole rotary bearing accessory, the rotary bearing inner ring 9 and the movable guide plate 2 are welded and fixed to rotate together with the movable guide plate 2, the rotary bearing rotary shaft 10 is a plurality of rotary round pipes or round balls and plays a role in supporting the rotary bearing clamping outer ring 8 and the rotary bearing inner ring 9 to run in coordination, a central controller transmits a length signal needing to be extended or shortened to the hydraulic numerical control telescopic rod 6 and controls the hydraulic numerical control telescopic rod 6 to be extended or shortened so as to drive the movable guide plate 2 and the rotary bearing inner ring 9 to move integrally.
Example three:
the overall structure of the third embodiment is shown in fig. 3a, and the detailed structure of the rotatable baffle is shown in fig. 3 b;
except for the movable central stabilizing plate 14 of the movable guide plate 2, the accessories used in the third embodiment also adopt the wind environment detection processor 7, the hydraulic numerical control telescopic rod 6 and the angle sensor 16 used in the first embodiment and the second embodiment, and the link, operation and signal transmission path principles among the accessories are the same as those of the first embodiment and the second embodiment and are not described again.
The movable guide plate 2 penetrates through a gap between the upper fish mouth steel plate 101 and the lower fish mouth steel plate 102, a hydraulic numerical control telescopic rod 6 is arranged between the end part of the movable guide plate 2, which is positioned in the upper fish mouth steel plate 101 and the lower fish mouth steel plate 102, and the hydraulic numerical control telescopic rod 6 is respectively hinged with the movable guide plate 2 and the lower fish mouth steel plate 102, a clamping plate 11 for fixing is arranged on the side part of the hydraulic numerical control telescopic rod 6, wear-resistant rubber 12 is arranged on the end part of the upper fish mouth steel plate 101 or the end part of the lower fish mouth steel plate 102, which is contacted with the movable guide plate 2, concretely, the third embodiment is that the hydraulic numerical control telescopic rod 6 is arranged in a fish mouth framework and is clamped and fixed by the clamping plate 11, the upper end of the hydraulic numerical control telescopic rod 6 is hinged with one end of the movable guide plate 2, so as to adjust the rotation angle of the movable guide plate 2. The sliding groove can be arranged on the steel plate 102 under the fish mouth, so that the movable guide plate 2 can be conveniently folded by the rotation fit of the clamping plate 11 and the hydraulic numerical control telescopic rod 6 when the movable guide plate 2 is not used, and the service life of the movable guide plate 2 is prolonged.
At the other end of the fish mouth upper steel plate 101 and the fish mouth lower steel plate 102, wear-resistant rubber 12 is adopted to coordinate the rotating friction fit between the movable guide plate 2 and the end of the fish mouth lower steel plate 102, and the wear-resistant rubber 12 has certain rigidity, strength and fatigue resistance, wherein the fish mouth lower steel plate 102 bears the dead weight of the movable guide plate 2, and the wear-resistant rubber 12 mounted on the fish mouth lower steel plate 102 has higher rigidity than the wear-resistant rubber 12 mounted on the fish mouth upper steel plate 101.
The wear-resistant rubber 12 is fixed on the end parts of the steel plate 101 on the fish mouth and the steel plate 102 under the fish mouth through the clamping studs, the effect of detachable replacement is achieved, and the clamping studs can be prefabricated into screw forms to be installed and fixed on the steel plate 101 on the fish mouth and the steel plate 102 under the fish mouth more conveniently
The angle sensors 16 are arranged on the movable guide plate 2 and the movable central stabilizing plate 14, real-time rotation angle detection is carried out on the movable guide plate 2 and the movable central stabilizing plate 14, detection signals are transmitted to the central controller, signal checking is carried out, it is ensured that the active control system forms a signal loop, and accurate and stable working state can be adjusted in real time.
Taking the first embodiment as an example, the control method is as follows:
a control method of an active control system for improving wind resistance of a long-span bridge comprises the following steps:
the method comprises the following steps: the wind environment detection processor 7 monitors the wind attack angle environment of the long-span bridge in real time, and a central controller is installed inside the wind environment detection processor 7;
step two: the wind environment detection processor 7 transmits the monitored wind attack angle data to the central controller, the central controller converts the wind attack angle data into angle data required to rotate by the movable guide plate 2 and the movable central stabilizing plate 14 through an embedded angle conversion program, and the central controller converts the angle data into length data required to be extended or shortened by the hydraulic numerical control telescopic rod 6 and the central hydraulic numerical control telescopic rod 15 respectively;
step three: the central controller sends instructions to the hydraulic numerical control telescopic rod 6 and the central hydraulic numerical control telescopic rod 15, the hydraulic numerical control telescopic rod 6 drives the movable guide plate 2 to rotate, and the central hydraulic numerical control telescopic rod 15 drives the movable central stabilizing plate 14 to rotate;
step four: after the movable guide plate 2 and the movable central stabilizing plate 14 rotate, the actual rotation angle is detected by the angle sensor 16 arranged on the movable guide plate 2 and the angle sensor 16 arranged on the movable central stabilizing plate 14 respectively, and the actual rotation angle is fed back to the central controller for calibration, so that a signal loop is formed, and the stable operation of the device is ensured.
The control methods of the second embodiment and the third embodiment are the same as those of the first embodiment, and are not repeated here.
The control system can be used in buildings and projects with wind resistance requirements such as high-rise buildings according to requirements, and comprises the following steps:
example four:
as a further design of the invention, the active control system is applied to the bridge tower. Fig. 4a is a cross sectional view of a square bridge tower with chamfers at the periphery, rotatable movable guide plates 2 are added in four corner areas of the bridge tower, a hydraulic numerical control telescopic rod is arranged between the side parts of the movable guide plates 2 and the bridge tower structure, and a wind environment detection processor 7 controls the hydraulic numerical control telescopic rod to extend or shorten, so that the problem of bridge tower vibration caused by changes of different wind environments can be effectively solved. Fig. 4b is a detailed structure diagram of the corner area of the bridge tower, and the detailed structure devices of the four corners of the bridge tower have the same structure and principle, so only one corner area is taken as an example for explanation.
The rotatable guide plate device in fig. 4b comprises a movable guide plate 2, an industrial heavy hinge, a hydraulic numerical control telescopic rod and an angle sensor 16, the device receives a prediction signal of a wind environment detection processor 7 on a bridge deck, the length of the hydraulic numerical control telescopic rod needing to be extended or shortened and the angle of the guide plate needing to be rotated are calculated through an angle conversion program, the device is started in real time, the rotation of the movable guide plate 2 is realized through the extension or shortening of the hydraulic numerical control telescopic rod, the rotation angle of the movable guide plate 2 is measured through the angle sensor 16, a signal is sent out and forms a closed signal loop with a central controller, and the stable operation of the device is ensured.
The movable guide plate 2 can be folded by rotating a corresponding angle under the condition of not using, and the service life of the movable guide plate is prolonged.
Example five:
In fig. 5b, the movable deflector 2 is connected to the edge of the wall of the high-rise building through an industrial heavy hinge, a hydraulic numerical control telescopic rod is arranged between the movable deflector 2 and the wall, the wind environment detection processor 7 can be installed on a balcony or an open place of the high-rise building so as to detect the wind environment in real time and transmit signals, the wind environment detection processor 7 transmits the detected wind signals to a central processor inside the high-rise building, the central processor converts the wind environment into the length of the hydraulic numerical control telescopic rod to be extended or shortened and the angle of the movable deflector 2 to be rotated through an angle conversion program embedded in the central processor, transmits the length signals to the movable hydraulic numerical control telescopic rod, the hydraulic numerical control telescopic rod realizes the rotation of the movable deflector 2 by extending or shortening the corresponding length, and an angle sensor 16 installed on the movable deflector 2 detects the rotation angle of, and transmitting the signals to a central processing unit to form a signal loop, so that the device is adjusted to the optimal state and stably operates.
The movable guide plate 2 in the real-time example 5 is installed with a high-rise building through an industrial heavy hinge.
The movable guide plate 2 can be folded by rotating a corresponding angle under the condition of not using, and the service life of the movable guide plate is prolonged.
The wind environment detection processor is adopted to measure the wind attack angle and other environments of the bridge in real time, and can be fixedly arranged on the bridge deck, so that the maintenance and the operation are convenient.
The wind environment detection processor transmits measured different wind environment signals to the central controller, the length of the hydraulic numerical control telescopic rod needing to be extended or shortened and the angle of the guide plate and the central stabilizing plate needing to be rotated are calculated through an angle conversion program embedded in the central controller, and the hydraulic numerical control telescopic rod controls the guide plate and the central stabilizing plate to rotate to a certain angle through extension or shortening, so that gas can be effectively shunted and bypassed, and the bridge structure is guaranteed to be in the optimal pneumatic state. The central controller, the angle conversion program and the angle sensor can cooperate with each other through a programming configuration forming system, so that the operation efficiency of the device is improved.
For better control and real-time adjustment of the rotation of the guide plate and the central stabilizing plate, the angle sensors are arranged on the guide plate and the central stabilizing plate, the angle sensors transmit signals to the central controller through measuring the real-time rotation angles of the guide plate and the central stabilizing plate, and the signals are checked to form a complete signal loop, so that on one hand, the rotation angles of the guide plate and the central stabilizing plate can be adjusted at any time aiming at the changed wind environment, and on the other hand, the stable working state of the device can be ensured
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an improve active control system of long-span bridge wind resistance ability which characterized in that: the large-span bridge comprises a fish mouth upper steel plate (101) and a fish mouth lower steel plate (102) which are arranged on the side part of a large-span bridge, wherein one end of the fish mouth upper steel plate (101) is connected with the edge of an upper bridge deck of the large-span bridge, one end of the fish mouth lower steel plate (102) is connected with the edge of a lower bridge deck of the large-span bridge, the other end of the fish mouth upper steel plate (101) and the other end of the fish mouth lower steel plate (102) are close to each other, and an outward movable guide plate (2) and an adjusting mechanism for controlling the movable guide plate (2) to rotate and move are arranged between the fish mouth upper steel plate (101) and the fish mouth lower; a wind environment detection processor (7) is arranged on a bridge deck of the long-span bridge; the bridge deck of the long-span bridge is further provided with a pair of central hinges (13), a movable central stabilizing plate (14) is arranged between the two central hinges (13), the central hinges (13) are folded, one part of the central hinges is fixedly attached to the bridge deck, the other part of the central hinges is attached to the movable central stabilizing plate (14), a central hydraulic numerical control telescopic rod (15) is further arranged between the movable central stabilizing plate (14) and the bridge deck, and the central hydraulic numerical control telescopic rod (15) is hinged to the movable central stabilizing plate (14) and the bridge deck respectively; angle sensors (16) are arranged on the movable guide plate (2) and the movable central stabilizing plate (14).
2. The active control system for improving wind resistance of the long-span bridge according to claim 1, wherein: the adjusting mechanism comprises a fixing plate (3), the fixing plate (3) is positioned between an upper fish mouth steel plate (101) and a lower fish mouth steel plate (102), a fixed guide plate (4) is arranged in a gap between the upper fish mouth steel plate (101) and the lower fish mouth steel plate (102) in a penetrating mode, one end of the fixed guide plate (4) is fixed on the fixing plate (3), the upper surface and the lower surface of the other end of the fixed guide plate are respectively provided with an industrial heavy hinge (5), two movable guide plates (2) are respectively arranged on the two industrial heavy hinges (5), a hydraulic numerical control telescopic rod (6) is arranged between the movable guide plate (2) close to the upper part and the upper fish mouth steel plate (101), the hydraulic numerical control telescopic rod (6) is respectively hinged with the movable guide plate (2) and the upper fish mouth steel plate (101), and a hydraulic numerical control telescopic rod (6) is arranged between the movable guide plate (2, the hydraulic numerical control telescopic rod (6) is respectively hinged with the movable guide plate (2) and the fish mouth lower steel plate (102).
3. The active control system for improving wind resistance of the long-span bridge according to claim 1, wherein: adjustment mechanism includes rolling bearing screens outer ring (8), rolling bearing inner ring (9) and rolling bearing axis of rotation (10), rolling bearing screens outer ring (8) are fixed to be set up steel sheet (101) and fish mouth down the homonymy tip of steel sheet (102) on the fish mouth, rolling bearing inner ring (9) are located rolling bearing screens outer ring (8), and rolling bearing axis of rotation (10) are located between rolling bearing screens outer ring (8) and rolling bearing inner ring (9), movable guide plate (2) are installed and are exposed in the outer part of rolling bearing screens outer ring (8) in rolling bearing inner ring (9), be provided with hydraulic pressure numerical control telescopic link (6) under movable guide plate (2) and the fish mouth between steel sheet (102), hydraulic pressure numerical control telescopic link (6) are articulated with movable guide plate (2) and fish mouth down steel sheet (102) respectively.
4. The active control system for improving wind resistance of the long-span bridge according to claim 1, wherein: the utility model discloses a fish mouth guide plate, including movable guide plate (2), movable guide plate (2) and fish mouth, the fish mouth is gone up steel sheet (101) and fish mouth down the clearance between steel sheet (102), movable guide plate (2) are located the fish mouth and are provided with hydraulic pressure numerical control telescopic link (6) between tip and the fish mouth in steel sheet (102) down on steel sheet (101) and the fish mouth, hydraulic pressure numerical control telescopic link (6) respectively with movable guide plate (2) and fish mouth down steel sheet (102) articulated, the lateral part of hydraulic pressure numerical control telescopic link (6) is installed and is used for fixed screens board (11), the tip of steel sheet (101) or fish mouth down the tip of steel sheet (102) and the part of movable guide plate (2) contact are provided with abrasion-resistant rubber (12).
5. The control method of the active control system for improving the wind resistance of the long-span bridge according to claim 2, is characterized by comprising the following steps:
the method comprises the following steps: the wind environment detection processor (7) monitors the wind attack angle environment of the long-span bridge in real time, and a central controller is installed inside the wind environment detection processor (7);
step two: the wind environment detection processor (7) transmits the monitored wind attack angle data to the central controller, the central controller converts the wind attack angle data into angle data to be rotated by the movable guide plate (2) and the movable central stabilizing plate (14) through an embedded angle conversion program, and the central controller converts the angle data into length data which needs to be extended or shortened respectively by the hydraulic numerical control telescopic rod (6) and the central hydraulic numerical control telescopic rod (15);
step three: the central controller sends instructions to the hydraulic numerical control telescopic rod (6) and the central hydraulic numerical control telescopic rod (15), the hydraulic numerical control telescopic rod (6) drives the movable guide plate (2) to rotate, and the central hydraulic numerical control telescopic rod (15) drives the movable central stabilizing plate (14) to rotate;
step four: after the movable guide plate (2) and the movable central stabilizing plate (14) rotate, actual rotation angles are respectively detected through an angle sensor (16) arranged on the movable guide plate (2) and an angle sensor (16) arranged on the movable central stabilizing plate (14), and the actual rotation angles are fed back to the central controller for calibration.
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| CN201810497199.1A CN108755390B (en) | 2018-05-22 | 2018-05-22 | Active control system and control method for improving wind resistance of long-span bridge |
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| CN201810497199.1A CN108755390B (en) | 2018-05-22 | 2018-05-22 | Active control system and control method for improving wind resistance of long-span bridge |
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| CN108755390B true CN108755390B (en) | 2020-08-18 |
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| CN109916580B (en) * | 2019-03-12 | 2020-08-04 | 重庆大学 | Self-supply control system for adjusting wind resistance of steel structure bridge |
| CN109826080B (en) * | 2019-03-22 | 2023-11-21 | 西南交通大学 | Pneumatic structure for improving vortex-induced vibration performance of wide steel box superposed beam |
| CN110241739A (en) * | 2019-06-28 | 2019-09-17 | 中铁七局集团有限公司 | Hydraulic climbing formwork digital intelligent control platform |
| CN110644350B (en) * | 2019-08-23 | 2020-12-29 | 深圳大学 | Bridge movable pneumatic measure device based on inertial volume vibration reduction and control method thereof |
| CN111172860A (en) * | 2020-01-14 | 2020-05-19 | 中铁二院工程集团有限责任公司 | Bridge flutter suppression device and application method thereof |
| CN111119031A (en) * | 2020-01-14 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Device for inhibiting bridge flutter and using method thereof |
| CN111101436A (en) * | 2020-01-14 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Bridge wind barrier device and using method thereof |
| CN111441234B (en) * | 2020-03-27 | 2021-04-20 | 中南大学 | Deformable air nozzle for inhibiting wind-induced vibration of bridge |
| CN112064488B (en) * | 2020-07-20 | 2022-09-27 | 深圳大学 | Pneumatic adjusting structure for bridge vortex vibration |
| CN112012094B (en) * | 2020-09-22 | 2021-12-07 | 同济大学 | Angle-adjustable flow restraining plate device suitable for bridge deck |
| CN112458881A (en) * | 2020-11-30 | 2021-03-09 | 大连理工大学 | Semi-active device for controlling bridge flutter |
| CN112942066B (en) * | 2021-01-12 | 2022-03-22 | 西南交通大学 | Mountain bridge wind-resistant stabilizing plate with adjustable form and installation method |
| CN113373794B (en) * | 2021-06-18 | 2022-02-15 | 中铁大桥勘测设计院集团有限公司 | Vortex vibration suppression structure suitable for large-span bridge and design method thereof |
| CN114369995B (en) * | 2022-02-21 | 2022-11-04 | 中南大学 | Flexible vortex generator for inhibiting bridge vortex vibration |
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| JPH09189009A (en) * | 1996-01-11 | 1997-07-22 | Nkk Corp | Wind resisting damping method of bridge girder |
| JP3376836B2 (en) * | 1996-11-08 | 2003-02-10 | 日本鋼管株式会社 | Wind-damping method of bridge girder |
| JP2000064221A (en) * | 1998-08-21 | 2000-02-29 | Nkk Corp | Structure, control device and control method |
| CN102191747B (en) * | 2011-03-25 | 2013-04-10 | 中铁大桥勘测设计院有限公司 | Adaptive tuyere of steel box girder |
| CN205369001U (en) * | 2016-01-21 | 2016-07-06 | 江苏宏远科技工程有限公司 | A anti -wind tuyere for bridge |
| CN107741749B (en) * | 2017-11-01 | 2019-12-10 | 东南大学 | Active wind-resistant movable tuyere of steel box girder and control system thereof |
| CN108035237A (en) * | 2017-12-31 | 2018-05-15 | 西南交通大学 | The wing plate system and its control method that a kind of suppression Bridge Flutter and whirlpool shake |
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