CN217601186U - Structural system for improving longitudinal and transverse response of large-span suspension bridge structure - Google Patents
Structural system for improving longitudinal and transverse response of large-span suspension bridge structure Download PDFInfo
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- CN217601186U CN217601186U CN202220917560.3U CN202220917560U CN217601186U CN 217601186 U CN217601186 U CN 217601186U CN 202220917560 U CN202220917560 U CN 202220917560U CN 217601186 U CN217601186 U CN 217601186U
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Abstract
The utility model belongs to the technical field of the bridge to a structural system for improving long-span suspension bridge structure is indulged and is transversely responded is specifically disclosed. The intelligent monitoring type multi-stage displacement control device comprises a main beam, a bridge pier and a plurality of intelligent monitoring type multi-stage displacement control devices, wherein the intelligent monitoring type multi-stage displacement control devices are longitudinally arranged along the main beam, one end of each intelligent monitoring type multi-stage displacement control device is connected with the main beam, and the other end of each intelligent monitoring type multi-stage displacement control device is connected with the bridge pier; the plurality of shock-absorbing energy-consuming wind-resistant supports are transversely arranged along the main beam, one end of each shock-absorbing energy-consuming wind-resistant support is connected with the main beam, and the other end of each shock-absorbing energy-consuming wind-resistant support is connected with the bridge pier; the vertical spherical steel supports are vertically arranged along the main beam, one end of each vertical spherical steel support is connected with the main beam, and the other end of each vertical spherical steel support is connected with the pier; and the control module is in communication connection with the intelligent monitoring type multi-stage displacement control device. The utility model discloses the system can improve large-span suspension bridge structural response, effectively reduce the telescoping device scale and accumulate the displacement, improve driving comfort, safe and reliable.
Description
Technical Field
The utility model belongs to the technical field of the bridge, more specifically relates to a structural system for improving long-span suspension bridge structure is indulged and is transversely responded to.
Background
Along with the increase of span, super large span suspension bridge component is higher, longer, more gentle, and self rigidity is littleer more and more, and the damping is more sensitive to dynamic action such as car live load, strong wind, earthquake, and the geometric non-linear effect that the bridge structure flexibility leads to is more outstanding, and reasonable structural system not only will solve the normal use extreme condition under the effect such as car, temperature, calm wind and the atress requirement of bearing capacity extreme condition, will satisfy the functional requirement that plays damping (shake) power consumption under dynamic action such as traffic stream, pulsating wind, earthquake, avoids bridge structure main part component to take place the damage. The traditional structural system cannot meet the design requirements of static and dynamic structures at the same time, so that a structural system for improving the longitudinal and transverse response of a large-span suspension bridge structure is required to be provided.
Because the suspension bridge does not have the restraint of a stay cable on the longitudinal displacement of a beam body like a cable-stayed bridge, the longitudinal restraint condition of the suspension bridge is closer to a free pendulum bob system, under the action of vehicles and pulsating wind, a main beam of the suspension bridge is in a high-frequency low-amplitude motion state longitudinally, and the longitudinal displacement of a few centimeters at each time is generated at a frequency of a minute level, so that a large amount of displacement cumulant is formed. By researching and researching overlarge span suspension bridges in service at home and abroad, it is found that expansion joints and supports of a river-yin bridge, a moistening-raising-length Jiang Daqiao south branch of a river bridge and a Yichangjiang highway bridge are damaged in different degrees, and the damage of the expansion joints and the supports is caused by overlarge accumulated displacement, so that certain measures are urgently needed to be taken to solve the longitudinal accumulated displacement caused by vehicles or pulsating wind and the like and prolong the service life of the supports, the expansion joints and other key constraint devices.
The damper has a certain service life as a protection device of the structure, but the damper belongs to a closed cylinder structure, and a sealing device, a piston assembly, a damping medium and the like of the damper are arranged in a cylinder, so that the working state and the performance deterioration condition of the damper cannot be accurately judged only from the appearance of the damper, and the performance state of the traditional viscous damper in the service period is uncertain, and whether the damper can play the role in the coming earthquake cannot be predicted, thereby bringing great uncertainty to the safety of a bridge. An intelligent monitoring function needs to be added to the damper, so that the working performance of the damper can be monitored in real time, and the safety and reliability of the damper are guaranteed.
SUMMERY OF THE UTILITY MODEL
To the above defect or improvement demand of prior art, the utility model provides a structural system and method for improving long-span suspension bridge structure indulges horizontal response wherein combine long-span suspension bridge structure self structural feature, corresponding design is used for improving the structural system that long-span suspension bridge structure indulged horizontal response to the structure and the concrete mode of setting up of its key subassembly study and design, if: the intelligent monitoring type multi-stage displacement control device is arranged between the longitudinal pier beams, can reduce the accumulated displacement of the beam ends caused by live load and pulsating wind of the automobile, simultaneously controls the longitudinal displacement of the main beam under the working condition that the static force is the most unfavorable, can exert damping energy consumption under the earthquake action, reduces the displacement of the main beam under the earthquake action, and reduces the structural response under the earthquake action; the novel damping energy-consumption wind-resistant support is arranged between the transverse pier beams, and can improve the stress performance of the main beams, piers and other members under the action of transverse live-load wind/century wind and transverse earthquake. Compared with the existing large-span suspension bridge structure system, the structure system of the invention has the core components: the intelligent monitoring type multi-stage displacement control device is longitudinally arranged between the pier beams, the novel damping energy-dissipation wind-resistant support is transversely arranged, and the spherical steel support is vertically arranged. The invention provides additional rigidity and additional damping for the large-span suspension bridge, effectively controls the structural deformation and the internal force response under static and dynamic loads, reduces the scale and the accumulated displacement of the beam-end expansion device, can realize the real-time monitoring of the damper, and has strong applicability.
In order to achieve the above object, the utility model provides a structural system for improving long span suspension bridge structure is indulged transverse response, including girder and pier, the girder is located on the pier, still include:
the intelligent monitoring type multi-stage displacement control devices are longitudinally arranged along the main beam, one end of each intelligent monitoring type multi-stage displacement control device is connected with the main beam, and the other end of each intelligent monitoring type multi-stage displacement control device is connected with the bridge pier;
the plurality of shock-absorbing energy-consuming wind-resistant supports are transversely arranged along the main beam, one end of each shock-absorbing energy-consuming wind-resistant support is connected with the main beam, and the other end of each shock-absorbing energy-consuming wind-resistant support is connected with the bridge pier;
the vertical spherical steel supports are vertically arranged along the main beam, one end of each vertical spherical steel support is connected with the main beam, and the other end of each vertical spherical steel support is connected with the pier; and
and the control module is in communication connection with the intelligent monitoring type multi-stage displacement control device.
Preferably, the damping, energy-consuming and wind-resistant support comprises a piston plate, a lower support plate, an elastic body, a displacement guide pillar and a friction damper, the elastic body, the displacement guide pillar and the friction damper are arranged between the piston plate and the lower support plate in parallel, a clearance hole is formed in the piston plate, the clearance hole and the displacement guide pillar are arranged correspondingly to provide a limiting clearance for the transverse movement of the displacement guide pillar, the elastic body is used for providing an initial internal force and limiting disturbance of an automobile and live wind to a main beam, the limiting clearance ensures that the main beam can move in a limited manner under the action of hundred-year transverse wind, and the friction damper is used for transverse damping and energy-consuming under the action of a transverse earthquake.
More preferably, the elastic body is a disc spring.
Preferably, the intelligent monitoring type multi-stage displacement control device comprises a communication unit, a data processing unit and a damper data acquisition unit, wherein the damper data acquisition unit is used for longitudinally connecting the main beam with the pier, and the data processing unit is respectively and electrically connected with the communication unit and the damper data acquisition unit.
Preferably, the damper data acquisition unit includes a multi-stage displacement control type damper and a data acquisition instrument, and a displacement sensor, a temperature sensor and a pressure sensor are further respectively connected in parallel between the multi-stage displacement control type damper and the data acquisition instrument.
Preferably, the number of the piers is two, and each pier is provided with two intelligent monitoring type multi-stage displacement control devices, two vertical spherical steel supports and two damping energy-consuming wind-resistant supports.
Generally, through the utility model discloses above technical scheme that conceive compares with prior art, mainly possesses following technical advantage:
1. the utility model discloses a multistage displacement control device of intelligent monitoring type, vertical spherical steel support carry out level four control to the suspension bridge longitudinal response of striding greatly, carry out tertiary control to the suspension bridge transverse response of striding greatly through novel shock attenuation power consumption anti-wind support, make the atress at different levels of the suspension bridge of striding greatly clear and definite, reasonable, improve structural design's rationality and economic nature.
2. The utility model discloses with key restraint device setting in transition mound department, can effectively reduce the horizontal restraint horizontal force that "seesaw" effect arouses great, transition mound department support appear pulling force, girder on the reason the pulling force problem appears, make the atress of the suspension bridge of striding greatly under the effect of static dynamic optimum, the ride comfort is better, makes the structure more erect simultaneously and succinct.
3. The utility model discloses the multistage displacement control device of intelligent monitoring type who vertically sets up between mound roof beam can effectively improve the vertical additional rigidity of bridge and additional damping, and the quiet dynamic effect of control long span suspension bridge is the displacement of lower beam end, reduces telescoping device's scale and accumulated displacement, improves pier internal force response under the quiet dynamic effect of structure to the state of service of automatic feedback attenuator
4. The damping energy-consumption wind-resistant support transversely arranged between the pier beams adopts a three-stage design, can control the transverse deformation of the bridge under the action of live load wind and temperature, and plays a role of buffering between the main beam and the pier; limiting the transverse deformation of the main beam under the action of the cross wind in one hundred years; under the action of earthquake, the damping and energy dissipation functions are exerted, and the stress performance of the structure is improved.
Drawings
Fig. 1 is a schematic structural diagram of a structural architecture for improving longitudinal and transverse response of a large-span suspension bridge structure according to a preferred embodiment of the present invention;
fig. 2 is a schematic top view of a structural system for improving the longitudinal and transverse response of a large span suspension bridge structure according to a preferred embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the transverse connection of the main girder to the bridge tower as referred to in FIG. 1;
fig. 4 is a schematic structural view of the damping, energy-consuming and wind-resistant support according to the present invention;
fig. 5 is a schematic diagram of the force-displacement constitutive relation of the damping energy-consuming wind-resistant support in a structural system for improving the longitudinal and transverse response of a large-span suspension bridge structure according to the preferred embodiment of the invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-a main beam; 2-a bridge tower; 3-a main cable; 4-a sling; 5-bridge pier; 6-anchorage; 7-an intelligent monitoring type multi-stage displacement control device; 8-damping energy-consuming wind-resistant support; 9-vertical spherical steel support; 81-lower support plate; 82-a piston plate; 83-an elastomer; 84-a friction damper; 85-displacement of the guide post.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
To large-span suspension bridge under the loading effect such as temperature, live load, pulsating wind, strong wind and earthquake the structure indulges horizontal internal force response big, the longitudinal deformation of beam-ends is big, the expansion joint scale is big with the accumulative displacement, driving travelling comfort is poor and attenuator operating condition is obscure technical problem, the utility model provides an improve large-span suspension bridge structural response, effectively reduce the telescoping device scale and accumulative displacement, improve driving comfort, safe and reliable's indulges horizontal structure system.
As shown in fig. 1, fig. 2 and fig. 3, the embodiment of the utility model provides a structural system for improving long span suspension bridge structure is indulged transverse response comprises girder 1, pylon 2, main rope 3, hoist cable 4, pier 5, anchorage 6, intelligent monitoring type multistage displacement controlling means 7, shock attenuation power consumption anti-wind support 8, vertical spherical steel support 9 etc.. The utility model discloses in, girder 1 is located on pier 5. And the intelligent monitoring type multi-stage displacement control devices 7 are longitudinally arranged along the main beam 1, one end of each intelligent monitoring type multi-stage displacement control device 7 is connected with the main beam 1, and the other end of each intelligent monitoring type multi-stage displacement control device 7 is connected with the bridge pier 5. And the plurality of shock-absorbing energy-consuming wind-resistant supports 8 are transversely arranged along the main beam 1, one end of each shock-absorbing energy-consuming wind-resistant support 8 is connected with the main beam 1, and the other end of each shock-absorbing energy-consuming wind-resistant support is connected with the bridge pier 5. And the vertical spherical steel supports 9 are vertically arranged along the main beam 1, one end of each vertical spherical steel support 9 is connected with the main beam 1, and the other end of each vertical spherical steel support 9 is connected with the pier 5. The control module is in communication connection with the intelligent monitoring type multi-stage displacement control device 7 and is used for inverting the working state of the damper to achieve an intelligent monitoring function by monitoring the displacement of the damper, the pressure of the cavity and the temperature of a damping medium, so that four-stage control over longitudinal static-dynamic response of the large-span suspension bridge and three-stage control over transverse static-dynamic response of the large-span suspension bridge are achieved.
As shown in fig. 4, the utility model discloses in, shock attenuation power consumption anti-wind support 8 includes piston plate, undersetting board and sets up side by side elastomer, displacement guide pillar and friction damper between piston plate and the undersetting board, be equipped with the mesopore on the piston plate, the mesopore with the displacement guide pillar corresponds the setting, in order to provide displacement guide pillar lateral shifting's spacing clearance, the elastomer is used for providing initial internal force, restricts the disturbance that car and live load wind arouse girder 1, spacing clearance is guaranteed under the effect of century cross wind girder 1 can the limited activity, under the effect of horizontal earthquake, friction damper is used for horizontal shock attenuation power consumption. In a preferred embodiment of the present invention, the damping, energy-consuming and wind-resistant support 8 is composed of a disc spring and a friction damper.
The utility model discloses in, through setting up the anti-wind support of shock attenuation power consumption in transition mound department, cancel the novel anti-wind support of shock attenuation power consumption of main tower department simultaneously, avoided transition mound and main tower department to set up "seesaw" effect that the anti-wind support exists simultaneously, reduce horizontal restraint horizontal force by a wide margin, improve transition mound and main tower atress. More specifically, this practical shock attenuation power consumption anti-wind support 8 carries out tertiary control to the horizontal static dynamic response of large span suspension bridge, and wherein first order control is: the damping energy-consumption wind-resistant support 8 provides an initial internal force, so that the disturbance of the automobile and live wind to the main beam is limited, and the driving comfort is ensured; the second level of control is: under the action of cross wind for one hundred years, the damping and energy-dissipating wind-resistant support 8 provides a small elastic rigidity in the limiting gap S, so that the main beam can move in a limited manner, a buffering effect is achieved between the main beam and the bridge pier, and when the deformation of the support is greater than the limiting distance S, the damping and energy-dissipating wind-resistant support 8 provides a large elastic rigidity to limit the large transverse deformation of the main beam; the third level of control is as follows: under the action of a transverse earthquake, the friction damper in the shock-absorbing energy-consuming wind-resistant support 8 plays an energy-consuming role, so that the transverse shock-absorbing energy-consuming role is realized, and the earthquake response of the pier is reduced.
Further, the damping energy-dissipation wind-resistant support 8 is arranged between the transverse bridge-direction main beam 1 and the bridge pier 5, the main beam 1 is transversely connected with the bridge pier 5, the damping energy-dissipation wind-resistant support 8 has transverse rigidity and damping at the same time, a force-displacement curve of the support under the static force action is a double-fold line type, namely the support with variable rigidity, and the rigidity value is determined according to the transverse three-level control design.
As shown in FIG. 5, the force-displacement curve of the abutment is of the double fold type with a first stiffness K 1 The second rigidity is K 2 The force-displacement relation of the support is as follows:
in the utility model, the main tower beam or the bracket is cancelled, and the vertical support is only arranged on the transition pier, so that the structure is more erect and simple, and simultaneously, the problems of overlarge pressure of the vertical support at the main tower and tension of the support at the transition pier are avoided, especially, the tension on the upper edge of the main beam is avoided, and the stress of the main beam is improved; on the other hand, the calculation length of the main beam is increased, the corner of the main beam is reduced, and the driving comfort is improved. The bridge tower does not have a bottom end rail, vertical displacement between a beam body and the cable tower is large under the action of live load, the intelligent monitoring type multi-stage displacement control device is arranged at the transition pier, vertical displacement caused by the action of live load can be avoided being effectively reduced, and the problem that the intelligent monitoring type multi-stage displacement control device is difficult to design and install is avoided.
Furthermore, the intelligent monitoring type multi-stage displacement control device 7 is a liquid viscous damper with an intelligent monitoring function, a live load limiting function, a static force limiting function and a damping energy dissipation function, the intelligent monitoring function is realized by monitoring the displacement, the cavity pressure and the damping medium temperature of the damper and inverting the working state of the damper, the live load limiting function is realized by arranging a hydraulic valve and a throttling hole on a piston, the limiting function is realized by adopting a limiting elastic device, and the damping energy dissipation function is realized by adopting a mode that a fluid medium flows through a specific hole on the piston to form damping force and is dissipated in a molecular heat energy mode. The intelligent monitoring type multi-stage displacement control device 7 is used for longitudinally connecting the main beam 1 with the pier 5; the longitudinal static dynamic response of the large-span suspension bridge is controlled in four stages through an intelligent monitoring type multi-stage displacement control device 7.
Specifically, the intelligent monitoring type multi-stage displacement control device 7 comprises a communication unit, a data processing unit and a damper data acquisition unit, wherein the damper data acquisition unit is used for longitudinally connecting the main beam 1 with the pier 5, and the data processing unit is respectively electrically connected with the communication unit and the damper data acquisition unit. The damper data acquisition unit comprises a multi-stage displacement control type damper and a data acquisition instrument, and a displacement sensor, a temperature sensor and a pressure sensor are respectively connected in parallel between the multi-stage displacement control type damper and the data acquisition instrument.
The multi-stage displacement control type damper is a multi-stage displacement control type damper in the prior art. An intelligent monitoring type multi-stage displacement control device 7 is arranged between the main beam 1 and the pier 5, additional rigidity can be provided under the static action to increase the structural rigidity, an additional damping device can be provided under the dynamic action (such as earthquake) to dissipate earthquake energy, and the number of the devices and key parameters depend on four-stage control design. Through the multistage displacement controlling means 7 of intelligent monitoring type, carry out four grades of control to the vertical static power response of large span suspension bridge, wherein first grade control is: under the action of temperature load, the longitudinal intelligent monitoring type multi-stage displacement control device 7 can adapt to the displacement generated by the slow motion of the temperature load, and the free extension of the main beam is not influenced; the second level of control is: under the action of normal operation load (automobile, pulsating wind and the like), the live load limiting function in the intelligent monitoring type multi-stage displacement control device 7 plays a role in limiting high-frequency low-amplitude displacement of the beam end and reducing the accumulated displacement of the expansion joint; the third level of control is as follows: under the condition of the worst static load, the static limiting device in the intelligent monitoring type multi-stage displacement control device 7 plays a role in limiting the displacement of the beam end and reducing the scale of the telescopic device; the fourth-stage control is as follows: under the effect of earthquake, the limiting device in the intelligent monitoring type multi-stage displacement control device 7 does not play a role, and the damper can deform freely in the stroke range of the damper, so that the damping and energy consumption effects are played.
The intelligent monitoring type multi-stage displacement control device 7 is arranged between the main beam 1 and the bridge pier 5, can effectively improve the longitudinal rigidity and the damping of the bridge, controls the displacement of the beam end of the large-span suspension bridge under the action of static and dynamic forces, reduces the scale and the accumulated displacement of the telescopic device, and reduces the response of the internal force of the suspension bridge under the action of the static and dynamic forces of the structure.
The spherical steel support 9 vertically connects the main beam 1 with the pier 5. The utility model discloses in, set up key restraint device in transition mound department, can effectively reduce the horizontal restraint horizontal force that "seesaw" effect arouses great, transition mound department support appear pulling force, girder on the reason the pulling force problem appears, make the atress of the suspension bridge of striding greatly under the effect of static power optimum, the ride comfort of driving is better, makes the structure more erect simultaneously and succinct.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a structural system for improving long span suspension bridge structure is indulged and is transversely responded to which characterized in that, includes girder (1) and pier (5), girder (1) are located on pier (5), still include:
the intelligent monitoring type multi-stage displacement control devices (7) are longitudinally arranged along the main beam (1), one end of each intelligent monitoring type multi-stage displacement control device (7) is connected with the main beam (1), and the other end of each intelligent monitoring type multi-stage displacement control device is connected with the bridge pier (5);
the shock-absorbing energy-consuming wind-resistant supports (8) are transversely arranged along the main beam (1), one end of each shock-absorbing energy-consuming wind-resistant support (8) is connected with the main beam (1), and the other end of each shock-absorbing energy-consuming wind-resistant support is connected with the bridge pier (5);
the vertical spherical steel supports (9) are vertically arranged along the main beam (1), one end of each vertical spherical steel support (9) is connected with the main beam (1), and the other end of each vertical spherical steel support is connected with the pier (5); and
and the control module is in communication connection with the intelligent monitoring type multi-stage displacement control device (7).
2. The structural system for improving the longitudinal and transverse response of the long-span suspension bridge structure is characterized in that the shock-absorbing and energy-dissipating wind-resistant support (8) comprises a piston plate, a lower support plate, and an elastic body, a displacement guide post and a friction damper which are arranged between the piston plate and the lower support plate in parallel, wherein a clearance hole is formed in the piston plate and is arranged corresponding to the displacement guide post so as to provide a limiting clearance for the transverse movement of the displacement guide post, the elastic body is used for providing an initial internal force and limiting the disturbance of the automobile and live load wind to the main girder (1), the limiting clearance ensures that the main girder (1) can move in a limited manner under the action of centurie transverse wind, and the friction damper is used for absorbing and dissipating energy transversely under the action of a transverse earthquake.
3. A structural system for improving the longitudinal-transverse response of a large-span suspension bridge structure according to claim 2, wherein said elastic body is a belleville spring.
4. The structural system for improving the longitudinal and transverse response of the large-span suspension bridge structure is characterized in that the intelligent monitoring type multi-stage displacement control device (7) comprises a communication unit, a data processing unit and a damper data acquisition unit, wherein the damper data acquisition unit longitudinally connects the main beam (1) with the bridge pier (5), and the data processing unit is electrically connected with the communication unit and the damper data acquisition unit respectively.
5. The structural system for improving the longitudinal and transverse response of the long-span suspension bridge structure according to claim 4, wherein the damper data acquisition unit comprises a multi-stage displacement control type damper and a data acquisition instrument, and a displacement sensor, a temperature sensor and a pressure sensor are respectively arranged between the multi-stage displacement control type damper and the data acquisition instrument in parallel.
6. A structural system for improving the longitudinal and transverse response of a large-span suspension bridge structure according to any one of claims 1-5, characterized in that two piers (5) are provided, and each pier (5) is provided with two intelligent monitoring type multi-stage displacement control devices (7), two vertical spherical steel supports (9) and two shock-absorbing energy-consuming wind-resistant supports (8).
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| CN202220917560.3U CN217601186U (en) | 2022-04-20 | 2022-04-20 | Structural system for improving longitudinal and transverse response of large-span suspension bridge structure |
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| CN202220917560.3U CN217601186U (en) | 2022-04-20 | 2022-04-20 | Structural system for improving longitudinal and transverse response of large-span suspension bridge structure |
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