CN112195765A - Mechanical locking friction pendulum vibration reduction and isolation support - Google Patents
Mechanical locking friction pendulum vibration reduction and isolation support Download PDFInfo
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- CN112195765A CN112195765A CN202011122517.XA CN202011122517A CN112195765A CN 112195765 A CN112195765 A CN 112195765A CN 202011122517 A CN202011122517 A CN 202011122517A CN 112195765 A CN112195765 A CN 112195765A
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- 238000002955 isolation Methods 0.000 title claims abstract description 58
- 230000009467 reduction Effects 0.000 title claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims description 30
- 230000000116 mitigating effect Effects 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 20
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 9
- 230000000452 restraining effect Effects 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 238000013016 damping Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000010008 shearing Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- E01D19/04—Bearings; Hinges
- E01D19/048—Bearings being adjustable once installed; Bearings used in incremental launching
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Abstract
The invention provides a mechanical locking friction pendulum vibration reduction and isolation support, which relates to the technical field of bridge construction and comprises a bottom plate and a friction pendulum support assembly arranged on the bottom plate, wherein the friction pendulum support assembly comprises an upper support plate, a spherical crown lining plate and a basin seat, and a sliding pair III is formed between the basin seat and the bottom plate; the support also comprises a triggering device and a mechanical locking device, wherein the triggering device is used for identifying an earthquake and can trigger the mechanical locking device to lock the sliding pair III when the earthquake is detected to be imminent or happened; the mechanical locking device is matched with the trigger device to form a locking state and an unlocking state under normal working conditions of the mechanical locking device on the sliding pair III; the mechanical locking friction pendulum seismic isolation and reduction support aims at solving the problems of reliability and economy of the conventional friction pendulum support in the prior art, can effectively guarantee the stability of the structure and performance of the seismic isolation and reduction support in application, achieves the purposes of damping and energy consumption, and has the advantages of safety and reliability in use and good seismic isolation and reduction effect.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a mechanical locking friction pendulum seismic mitigation and isolation support.
Background
The application of the seismic isolation and reduction technology in the field of bridge construction mainly utilizes the seismic isolation and reduction device to improve safety when encountering earthquake and reduce structural damage, the mainstream seismic isolation and reduction device at the present stage mainly adopts a friction pendulum seismic isolation and reduction support, the structural principle of the seismic isolation and reduction support is that when the normal functional requirements of a bridge are met, the mutual sliding delay structural period between friction pendulum surfaces similar to a pendulum principle is adopted to achieve a seismic isolation effect, and meanwhile, the friction energy consumption between the pendulum surfaces achieves a seismic isolation effect.
Although the conventional friction pendulum support can meet the seismic isolation and reduction requirements of the bridge, the displacement under the normal working condition is provided by a sliding pair between pendulum surfaces, so that the beam body can be lifted under the normal working condition, and the normal operation of the bridge is not facilitated; meanwhile, the conventional friction pendulum support is not accurate enough in earthquake recognition, and cannot achieve the effects of cooperative stress and multi-pier linkage seismic isolation and reduction, so that the development is limited. Accordingly, a combined form of a speed locker and a friction pendulum support is developed by those skilled in the art, and the basic principle is that on the basis of a conventional friction pendulum support, the earthquake starting time is accurately identified through the speed locker, so that the effect of multi-pier cooperative shock absorption and isolation is realized, but the speed locking type friction pendulum support has the defects of overlarge installation size of a combined structure, high sealing requirement of the locker, poor economy and the like, so that the application in the field of bridge construction is still less.
Disclosure of Invention
The invention provides a mechanical locking friction pendulum vibration reduction and isolation support, which aims to solve the problems of the conventional friction pendulum support in the prior art, effectively ensure the stability of the structure and the performance of the vibration reduction and isolation support in application, realize vibration reduction and energy consumption and have good economy.
The technical scheme adopted by the invention is as follows:
mechanical locking friction pendulum subtracts isolation bearing, include the bottom plate and locate the friction pendulum support assembly on the bottom plate, friction pendulum support assembly includes upper bracket board, spherical crown welt and basin seat, wherein
A sliding pair I is formed between the spherical crown lining plate and the upper support plate, a sliding pair II for providing rotation for a support is formed between the spherical crown lining plate and the basin seat, and a sliding pair III is formed between the basin seat and the bottom plate for providing relative displacement under normal working conditions;
the support also comprises a trigger device and a mechanical locking device; wherein
The triggering device is connected with the mechanical locking device and is used for identifying an earthquake and triggering the mechanical locking device to lock the sliding pair III when the earthquake is detected to be imminent or happened;
the mechanical locking device is matched with the trigger device to form a locking state and an unlocking state under a normal working condition of the mechanical locking device for the sliding pair III, and the basin seat is in sliding fit with the bottom plate under the unlocking state so that the sliding pair III can provide relative displacement for the normal working condition; in a locking state, the basin seat is fixedly connected with the bottom plate, so that the sliding pair III is locked;
the friction pendulum support assembly further comprises a pre-tightening structure for restraining the sliding pair I under normal working conditions, so that the restraining force of the sliding pair I can be relieved when the sliding pair III is locked.
The mechanical locking friction pendulum vibration reduction and isolation support of the technical scheme has the following action principle: under a normal working condition, a sliding pair I of the friction pendulum support assembly is restrained through a pre-tightening structure, a sliding pair II relatively displaces to adapt to the rotation of the bridge, a sliding pair III relatively slides to adapt to the normal displacement of the bridge, and therefore the normal displacement and rotation requirements of the bridge are met, the overall height of the support cannot be changed, the upper bridge cannot be lifted, and the trigger device and the mechanical locking device do not play a role in the stage;
when an earthquake comes or occurs, the earthquake is recognized through the trigger device, and the sliding pair III is simultaneously triggered to be locked by the mechanical locking device, at the moment, the basin seat is fixedly connected with the bottom plate through the mechanical locking device, the displacement of the sliding pair III is restrained, so that the load is transmitted to the pre-tightening structure on the friction pendulum support assembly, the pre-tightening structure is cut off, the restraining force of the pre-tightening structure on the sliding pair I is relieved, and the damping and energy consumption are realized by the relative sliding of the curved surface sliding pair I.
In an embodiment of the invention, the friction pendulum support assembly further includes an upper curved surface sliding plate, and the upper curved surface sliding plate is embedded in a groove at the top of the spherical crown lining plate, so that a sliding pair I is formed between the spherical crown lining plate and the upper support plate, and the sliding pair I is a main energy consumption friction pair in earthquake.
In an embodiment of the invention, the friction pendulum support assembly further comprises a middle curved surface sliding plate, the middle curved surface sliding plate is embedded in the inner concave groove at the top of the basin seat, so that a sliding pair II is formed between the lower curved surface of the spherical crown lining plate and the basin seat, and the sliding pair II is designed to provide rotation for the support.
In an embodiment of the invention, the friction pendulum support assembly further comprises a lower plane sliding plate, the lower plane sliding plate is embedded in a groove on the lower surface of the basin seat, so that the basin seat and the stainless steel plate fixed on the bottom plate form a sliding pair III, and the sliding pair III is designed to provide relative displacement for normal working conditions.
In an embodiment of the invention, the pre-tightening structure comprises a shear-resistant stop block and a shear-resistant pin I, the shear-resistant stop block is fixed on the basin seat, and the shear-resistant pin I is used for fixing the upper support plate and the shear-resistant stop block, wherein the shear-resistant pin I has a fusing function and restrains the shear-resistant stop block to form a curved sliding pair I under normal working conditions, and when an earthquake is recognized to be imminent or occurred, the planar sliding pair III is locked by a mechanical locking device, so that a load is transmitted to the shear-resistant pin I to be cut off, the curved sliding pair I is released, and energy consumption and shock absorption are realized.
In one embodiment of the invention, the triggering device is an active identification seismic device or a passive identification seismic device; preferably, the active recognition seismic device is a velocity sensor or an acceleration sensor; preferably, the passive identification seismic device is a velocity lock.
In one embodiment of the invention, the speed locker comprises piston rods and piston cylinders which are symmetrically arranged at two sides of the basin seat, a locking rod arranged between the two piston cylinders and a second shear resistant pin arranged on the locking rod, wherein the locking rod penetrates through the bottom of the basin seat and has a certain gap with a preformed hole of the basin seat, and the second shear resistant pin axially penetrating through the locking rod is axially and relatively fixed with the basin seat; and the locking rod is provided with a matching key matched with the mechanical locking device. By adopting the structure, under the normal working condition, the sliding pair IV between the piston rod and the piston cylinder and the sliding pair III synchronously slide relatively to adapt to the normal displacement of a bridge, when an earthquake occurs, the piston rod and the piston cylinder are locked, and at the moment, the horizontal load reaches the designed shearing force of the second shearing-resistant pin, so that the second shearing-resistant pin is sheared, the locking rod and the basin seat begin to generate relative displacement, and the matching key is synchronously driven to act on the mechanical locking device to trigger the sliding pair III to be locked.
In an embodiment of the present invention, the mechanical locking device includes a guide sleeve, an elastic member and a latch accommodated in the guide sleeve, and a rack fixedly disposed on a bottom plate, the rack and the locking rod are disposed in parallel and penetrate through the bottom of the basin seat, the mating key is accommodated in the guide sleeve and can move synchronously along the axial direction of the locking rod along with the locking rod, wherein the guide sleeve is fixedly connected with the basin seat, so that under a normal working condition, the mating key is located between the elastic member and the latch, and the elastic member is pre-pressed between the bottom of the guide sleeve and the mating key, so that the latch and the rack are not in contact with each other; when an earthquake occurs, the triggering device triggers the locking rod and the basin seat to move relatively, and drives the matching key to displace so that the elastic piece acts on the latch to enable the latch to be meshed with the rack. Adopt above-mentioned structure, can make trigger device passive discernment earthquake take place, automatic triggering mechanical locking device pins the basin seat simultaneously, and then lock sliding pair III, just regard as mechanical locking device's trigger device with miniature speed locking ware promptly, it need not bear great earthquake horizontal force itself, can effectively solve current speed locking type friction pendulum support and have the too big technical problem of integrated configuration installation size, greatly reduce the requirement to speed locking ware, better economic nature has, can be better be applied to the bridge construction field.
In an embodiment of the present invention, the mechanical locking device is a shear pin disposed on the bottom plate, so that when the triggering device recognizes that an earthquake is coming or occurring, the basin base is fixed by the shear pin to lock the sliding pair III.
In one embodiment of the invention, the mechanical locking device comprises a driving mechanism, a pressing plate, a meshing plate and a pre-pressing spring, wherein the driving mechanism is in signal connection with the speed sensor or the acceleration sensor, the meshing plate is fixedly connected with the basin seat, meshing teeth B corresponding to the meshing teeth A on the pressing plate are arranged on the meshing plate, the pressing plate is in limit sliding connection with the bottom plate in the vertical direction, the pressing plate is respectively matched with the driving mechanism and the pre-pressing spring, and the pre-pressing spring is arranged on the bottom plate and acts on the pressing plate, so that under the normal working condition, the pressing plate is separated from the meshing plate under the action of the pre-pressing spring; when the speed sensor or the acceleration sensor identifies that an earthquake comes, the driving mechanism can be triggered to act, and the meshing teeth A on the driving pressing plate are meshed with the meshing teeth B on the meshing plate.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the mechanical locking friction pendulum vibration reduction and isolation support, under the normal working condition, the curved surface sliding pair I is locked by the pre-tightening structure, the plane sliding pair III slides relatively to adapt to the normal displacement of a beam body, the sliding pair II moves relatively to adapt to the normal rotation of a bridge, when the triggering device identifies the occurrence of an earthquake, the sliding pair III is locked by the mechanical locking device, the curved surface sliding pair I is released, and friction energy consumption is realized through the relative sliding of the curved surface sliding pair I.
2. The triggering device can be an active recognition earthquake device or a passive recognition earthquake device, when an earthquake comes or occurs, the earthquake can be actively or passively recognized so as to generate actuation, and the active recognition device can be a speed sensor or an acceleration sensor; the passive identification seismic device can be a speed locker, and the key point of the passive identification seismic device is that the mechanical locking device can be triggered to be linked to lock the sliding pair III.
3. The mechanical locking device adopts a mechanical structure and is connected with the trigger device in series, the trigger device triggers the action of the trigger device, the planar sliding pair III can be locked when the earthquake is detected to come or occur, the action is rapid and sensitive, and the effects of cooperative stress and shock absorption and isolation are accurately achieved; meanwhile, the mechanical locking device is preferably of a meshing tooth structure, so that the stability of locking the sliding pair III by the mechanical locking device can be effectively guaranteed, and the use safety and reliability of the mechanical locking device are guaranteed.
4. The trigger device is matched with the mechanical locking device to act on the friction pendulum support assembly, a small speed locking device is only used as the trigger device of the mechanical locking device, and compared with the traditional speed locking device and the friction pendulum support which share the triggering and locking functions and need to directly bear horizontal seismic force, the mechanical locking device has higher requirements on size and performance; on the other hand, the stability of the structure and the performance of the seismic isolation and reduction support in application can be effectively guaranteed, the structural design is ingenious, the economical efficiency is good, the seismic isolation and reduction support has good application prospect and popularization and use value, and the seismic isolation and reduction support is particularly suitable for popularization and application in the field of bridge construction.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a mechanical locking friction pendulum seismic mitigation and isolation bearing provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a friction pendulum support assembly in the mechanical locking friction pendulum seismic mitigation and isolation support provided by the embodiment of the invention;
FIG. 3 is a schematic structural diagram of a trigger device and a mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation support provided by the embodiment of the invention;
FIG. 4 is an assembly schematic diagram of a trigger device in a mechanical locking friction pendulum seismic mitigation and isolation support provided by the embodiment of the invention;
FIG. 5 is an assembly schematic diagram of a mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation bearing provided by the embodiment of the invention;
FIG. 6 is a schematic diagram of a trigger device and a mechanical locking device in a mechanical locking friction pendulum seismic mitigation and isolation support provided by an embodiment of the invention;
FIG. 7 is a partial cross-sectional view of the trigger device and the mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation bearing provided by the embodiment of the invention;
FIG. 8 is a schematic structural diagram of a trigger device and a mechanical locking device in a mechanical locking friction pendulum seismic mitigation and isolation bearing provided by another embodiment of the invention;
FIG. 9 is a schematic view of the trigger device and the mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation bearing provided by another embodiment of the invention;
fig. 10 is a partial cross-sectional view of a mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation bearing according to the second embodiment of the present invention, which forms an unlocked state for the sliding pair III;
fig. 11 is a partial cross-sectional view of a sliding pair III in a locked state by the mechanical locking device in the mechanical locking friction pendulum seismic mitigation and isolation bearing provided by the second embodiment of the invention.
Icon: 1-a friction pendulum support assembly; 101-an upper support plate; 102-upper curved surface sliding plate; 103-spherical cap liner plate; 104-middle curved surface sliding plate; 105-a basin seat; 106-lower plane sliding plate; 107-shear blocks; 108-shear pin one; 109-stainless steel plate; 110-a base plate; 2-a speed locker; 201-a piston rod; 202-a piston cylinder; 203-locking bar; 204-a second shear pin; 205-a mating key; 20-a speed sensor;
3-mechanical locking device; 301-a guide sleeve; 302-an elastic member; 303-latch; 304-a rack; 305-a cam mechanism; 306-a compacting plate; 307-engaging plates; 308-a pre-pressing spring; 309-engaging tooth A; 310-engaging teeth B.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Example one
The embodiment provides a mechanical locking friction pendulum seismic mitigation and isolation bearing, please refer to fig. 1 and fig. 2, the mechanical locking friction pendulum seismic mitigation and isolation bearing comprises a bottom plate 110 and a friction pendulum bearing assembly 1 arranged on the bottom plate 110, wherein the friction pendulum bearing assembly 1 provided by the embodiment comprises an upper support plate 101, an upper curved surface sliding plate 102, a spherical crown lining plate 103, a middle curved surface sliding plate 104, a basin seat 105 and a lower plane sliding plate 106, the upper curved surface sliding plate 102 is embedded in a groove of the spherical crown lining plate 103, the middle curved surface sliding plate 104 is embedded in a groove of the basin seat 105, and the lower plane sliding plate 106 is embedded in a groove of the lower surface of the basin seat 105 and is in sliding connection with a stainless steel plate 109 fixed on the bottom plate 110;
specifically, a sliding pair I is formed between the spherical crown lining plate 103 and the upper support plate 101, and is specifically embedded in a groove at the top of the spherical crown lining plate 103 through an upper curved surface sliding plate 102, so that the sliding pair I is formed between the spherical crown lining plate 103 and the upper support plate 101, and the sliding pair I is a main energy consumption friction pair in earthquake; a sliding pair II for providing rotation for the support is formed between the spherical cap lining plate 103 and the basin seat 105, and is specifically embedded in an inner concave groove at the top of the basin seat 105 through a middle curved surface sliding plate 104, so that the sliding pair II is formed between the lower curved surface of the spherical cap lining plate 103 and the basin seat 105, and the sliding pair II is designed to provide rotation for the support; a sliding pair III is formed between the basin seat 105 and the bottom plate 110 and is used for providing relative displacement under normal working conditions; it specifically inlays in basin seat 105 lower surface groove department through lower plane slide 106 to make basin seat 105 and the stainless steel plate 109 who is fixed in on bottom plate 110 form the vice III that slides, this structural design so that the vice III that slides provides relative displacement for under the normal operating mode.
The structural design key of the seismic isolation and reduction support is that the seismic isolation and reduction support further comprises a trigger device and a mechanical locking device 3, the problems of the conventional speed locking type friction pendulum support can be effectively solved, and the seismic isolation and reduction support can be better applied to the field of bridge construction; specifically, the triggering device is connected with the mechanical locking device 3, and the triggering device is used for identifying an earthquake and can trigger the mechanical locking device 3 to lock the sliding pair III when the earthquake is detected to be imminent or occurs; the mechanical locking device 3 is matched with the trigger device to form a locking state and an unlocking state under normal working conditions of the mechanical locking device 3 on the sliding pair III, in the unlocking state, the basin seat 105 is in sliding fit with the bottom plate 110, and the sliding pair III is in a releasing state, so that the sliding pair III can provide relative displacement for the normal working conditions; in the locked state, the basin seat 105 is fixedly connected with the bottom plate 110, so that the sliding pair III is locked; meanwhile, the friction pendulum support assembly 1 further comprises a pre-tightening structure for restraining the sliding pair I under normal working conditions, so that the restraining force of the sliding pair I can be relieved when the sliding pair III is locked.
Preferably, the pretensioning structure comprises a shear block 107 and a first shear pin 108, the shear block 107 is welded on the basin seat 105, and the first shear pin 108 is arranged between the upper support plate 101 and the shear block 107 for fixing the upper support plate 101 and the shear block 107; the first shear pin 108 has a fusing function, restrains the curved surface sliding pair I with the shear stop 107 under normal working conditions, and locks the planar sliding pair III through the mechanical locking device 3 when an earthquake is recognized to be imminent or occurs, so that the load is transferred to the first shear pin 108 to be sheared, the curved surface sliding pair I is released, and the damping and energy consumption are realized.
The mechanical locking friction pendulum vibration reduction and isolation support has the following action principle: under a normal working condition, a sliding pair I of the friction pendulum support assembly 1 is restrained through a shear stop block 107 and a shear pin I108, the relative displacement of a sliding pair II is suitable for the rotation of the bridge, and the relative sliding of a sliding pair III is suitable for the normal displacement of the bridge, so that the normal displacement and rotation requirements of the bridge are met, the overall height of the support cannot be changed, the upper bridge cannot be lifted, and a trigger device and a mechanical locking device do not play a role at this stage;
when an earthquake comes or occurs, the earthquake is recognized through the trigger device, the mechanical locking device 3 is used for locking the sliding pair III in a triggering mode, at the moment, the mechanical locking device 3 enables the basin seat 105 to be fixedly connected with the bottom plate 110, the displacement of the sliding pair III is restrained, the load is transmitted to the pre-tightening structure on the friction pendulum support assembly 1, the first shear resistant pin 108 is cut off, the restraint force of the shear resistant stop block 107 on the sliding pair I is relieved, and then the curved surface sliding pair I slides relatively, so that the shock absorption and energy consumption are achieved.
The triggering device provided by the embodiment can be an active recognition seismic device or a passive recognition seismic device, and can also be a passive recognition seismic device, for example, the active recognition seismic device can be a speed sensor or an acceleration sensor, and when an earthquake is recognized to come, the mechanical locking device 3 is triggered to lock the sliding pair III, so that the basin seat 105 and the bottom plate 110 are changed into fixed connection from sliding connection; of course, the active earthquake recognition device is not limited to a velocity sensor or an acceleration sensor, and any device or equipment capable of actively recognizing an earthquake in the prior art is within the protection scope of the invention.
On the other hand, the passive identification seismic device can also be a velocity locker 2, in the embodiment, the velocity locker 2 only uses a small velocity locker 2 as a trigger device of a mechanical locking device 3, and the velocity locker 2 and the mechanical locking device 3 work together, and the velocity locker does not need to bear large horizontal seismic force, so the structure in the invention can greatly reduce the requirement on the velocity locking period; meanwhile, the mechanical locking device 3 is a mechanical structure, which can be an existing gear and rack 304 meshing structure or a shear pin, and the purpose of the mechanical locking device is to lock the plane sliding pair III when an earthquake is triggered and identified.
Example two
The first embodiment is substantially the same as the second embodiment, except that: as shown in fig. 3 to 7, the triggering device provided by the present embodiment is a small-sized velocity lock 2, wherein the velocity lock 2 includes a piston rod 201 and a piston cylinder 202 symmetrically disposed on two sides of a basin seat 105, a locking rod 203 disposed between the two piston cylinders 202, and a second shear pin 204 disposed on the locking rod 203, the locking rod 203 penetrates through the bottom of the basin seat 105 and has a certain gap with a preformed hole of the basin seat 105, and the locking rod 203 is axially fixed with the basin seat 105 by the second shear pin 204 axially penetrating through the locking rod 203; the locking rod 203 is provided with a matching key 205 matched with the mechanical locking device 3; the basic working form of the trigger device of the embodiment is that under a normal working condition, the sliding pair IV and the sliding pair III between the piston rod 201 and the piston cylinder 202 synchronously slide relatively to adapt to normal displacement of a bridge, when an earthquake occurs, the piston rod 201 and the piston cylinder 202 are locked, and at the moment, a horizontal load reaches the designed shearing force of the second shearing resistant pin 204, so that the second shearing resistant pin 204 is sheared, relative displacement starts to be generated between the locking rod 203 and the basin seat 105, the matching key 205 is synchronously driven to act on the mechanical locking device 3, and the sliding pair III is triggered to be locked.
The mechanical locking device 3 provided by this embodiment includes a guide sleeve 301, an elastic member 302 and a latch 303 accommodated in the guide sleeve 301, and a rack 304 fixed on the bottom plate 110, where the elastic member 302 may be a compressed spring in the prior art; specifically, the rack 304 and the locking rod 203 are arranged in parallel and penetrate through the bottom of the basin seat 105, the matching key 205 is accommodated in the guide sleeve 301 and can synchronously move along the axial direction of the locking rod 203 along with the locking rod, wherein the guide sleeve 301 is fixedly connected with the basin seat, so that under a normal working condition, the matching key 205 is positioned between the elastic piece 302 and the latch 303, and the elastic piece 302 is pre-pressed between the bottom of the guide sleeve 301 and the matching key 205, so that the latch 303 and the rack 304 are not contacted with each other; when an earthquake occurs, the trigger device triggers the locking rod 203 and the basin seat 105 to move relatively, the matching key 205 is driven to displace to release the elastic piece 302, so that the elastic piece 302 acts on the latch 303 to push the latch 303 to be meshed with the rack 304, the basin seat 105 is fixedly connected with the bottom plate 110, and the plane sliding pair III is locked and fixed.
Adopt above-mentioned structure, speed locker 2 is passive discernment seismic installations, can the earthquake emergence of passive discernment, automatic trigger mechanical locking device 3 pins basin seat 105 simultaneously, and then lock slide pair III, just regard as mechanical locking device 3's trigger device with miniature speed locker 2 promptly, it need not bear great earthquake horizontal force itself, can effectively solve current speed locking type friction pendulum support and have the too big technical problem of integrated configuration installation size, greatly reduce the requirement to speed locker 2, have better economic nature, can be better be applied to the bridge construction field.
EXAMPLE III
The third embodiment is substantially the same as the second embodiment, except that: as a preferred implementation manner of the second embodiment, the triggering device provided in this embodiment may be an acceleration sensor, but is not limited to this, and the triggering device may also be a velocity sensor, and it is intended that the triggering device can actively recognize and act on an earthquake due to a velocity abnormality temporarily caused by the earthquake.
The mechanical locking device provided by the embodiment is the same as the embodiment, and is different in that the trigger device comprises a controller connected with piston cylinders on two sides of the basin seat to control the piston rod to stretch and retract, so that after the acceleration sensor actively recognizes an earthquake, the controller receives a signal and controls the piston rod to act, relative displacement starts to be generated between the locking rod and the basin seat, the matching key 205 is synchronously driven to act on the mechanical locking device 3, and the sliding pair III of the mechanical locking device is triggered to be locked.
Example four
The fourth embodiment is substantially the same as the first embodiment, except that: as shown in fig. 8 to 11, the triggering device provided in this embodiment is a velocity sensor 20, but is not limited to this, and the triggering device may also be an acceleration sensor, and it is intended that the triggering device can actively identify and act on an earthquake when the velocity is abnormal temporarily caused by the earthquake.
The mechanical locking device 3 provided in this embodiment includes a driving mechanism, a pressing plate 306, an engaging plate 307, and a pre-pressing spring 308, where the driving mechanism is in signal connection with the speed sensor 20, and after the speed sensor 20 receives an earthquake signal, the earthquake signal is transmitted to a controller configured to the driving mechanism, and the controller controls the driving mechanism to act, so as to trigger the mechanical locking device 3 to lock the planar sliding pair III, where the control triggering manner is the prior art and is not an inventive point of the present disclosure, and therefore is not described herein again; the driving mechanism is preferably a cam mechanism 305, in this embodiment, the cam mechanism 305 is designed to trigger the pressing plate 306 to operate, but the driving mechanism may be other driving devices or apparatuses in the prior art, and all of them should be within the protection scope of the present invention.
What is more, in the mechanical locking device 3 of the present embodiment, the engaging plate 307 is fixedly connected to the bowl base, and the engaging plate 307 is provided with engaging teeth B310 corresponding to the engaging teeth a309 on the pressing plate 306, the pressing plate 306 is connected to the bottom plate in a limited sliding manner in the vertical direction, and the pressing plate 306 is respectively matched with the driving mechanism and the pre-pressing spring 308; spacing sliding connection here specifically means that bottom plate tip department all around is equipped with spacing fender groove, and the jam plate 306 imbeds all around and keeps off the inslot, and the cooperation through jam plate 306 and spacing fender groove makes the binding power that has horizontal displacement between jam plate 306 and the bottom plate and release vertical displacement, and then reaches the purpose of jam plate 306 and bottom plate at the spacing sliding connection of vertical direction, clearance fit between this embodiment jam plate 306 and the basin seat simultaneously does benefit to the normal displacement of basin seat under normal operating mode.
In this embodiment, the pre-pressing spring 308 is disposed on the bottom plate and acts on the pressing plate 306, specifically, the lower end of the pre-pressing spring 308 contacts with the top surface of the bottom plate, and the upper end of the pre-pressing spring 308 contacts with the bottom surface of the pressing plate 306, so that under a normal working condition, the pressing plate 306 is separated from the engaging plate 307 under the action of the pre-pressing spring 308 and abuts against the cam mechanism 305, the basin stand can generate relative displacement in the middle of the pressing plate 306, and the sliding pair III slides relatively to adapt to the normal displacement of the bridge; when the speed sensor 20 recognizes that an earthquake comes, the cam mechanism 305 can be triggered to rotate, the compression plate 306 is driven to press downwards to enable the meshing teeth A309 on the compression plate 306 to be meshed with the meshing teeth B310 on the meshing plate 307, then the basin seat and the bottom plate are in a fixed connection state by locking the meshing plate 307, so that the displacement of the sliding pair III is restrained, the load is transmitted to the pre-tightening structure on the friction pendulum support assembly, the pre-tightening structure is cut off, the restraining force of the pre-tightening structure on the sliding pair I is relieved, and the curved surface sliding pair I slides relatively to achieve damping and energy consumption.
In conclusion, under a normal working condition, the mechanical locking friction pendulum vibration reduction and isolation support locks the curved sliding pair I by using the pre-tightening structure, the planar sliding pair III slides relatively to adapt to normal displacement of a beam body, the sliding pair II moves relatively to adapt to normal rotation of a bridge, when the triggering device identifies the occurrence of an earthquake, the mechanical locking device 3 is used for locking the sliding pair III, the curved sliding pair I is released, and friction energy consumption is realized by the relative sliding of the curved sliding pair I, so that the structural form can effectively ensure that the planar sliding pair provides normal displacement under the normal working condition, and the lifting of the upper beam body can be effectively avoided; meanwhile, a mechanical structure is connected with the trigger device in series, the trigger device triggers the action of the trigger device, the plane sliding pair III can be locked when the earthquake is detected to come or occur, the action is rapid and sensitive, and the effects of coordinated stress and shock absorption and isolation are accurately achieved.
The trigger device is matched with a mechanical locking device 3 to act on a friction pendulum support assembly, a small speed locker can be used as the trigger device of the mechanical locking device 3, a speed sensor or an acceleration sensor can be used as the trigger device of the mechanical locking device 3, and the trigger device and the mechanical locking device can be applied in a crossed way in the specific implementation process; on the other hand, the stability of the structure and the performance of the seismic isolation and reduction support in application can be effectively guaranteed, the structural design is ingenious, the economical efficiency is good, the seismic isolation and reduction support has good application prospect and popularization and use value, and the seismic isolation and reduction support is particularly suitable for popularization and application in the field of bridge construction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Mechanical locking friction pendulum subtracts isolation bearing, includes the bottom plate and locates the friction pendulum support assembly on the bottom plate, its characterized in that, friction pendulum support assembly includes upper bracket board, spherical crown welt and basin seat, wherein
A sliding pair I is formed between the spherical crown lining plate and the upper support plate, a sliding pair II for providing rotation for a support is formed between the spherical crown lining plate and the basin seat, and a sliding pair III is formed between the basin seat and the bottom plate for providing relative displacement under normal working conditions;
the support also comprises a trigger device and a mechanical locking device; wherein
The triggering device is connected with the mechanical locking device and is used for identifying an earthquake and triggering the mechanical locking device to lock the sliding pair III when the earthquake is detected to be imminent or happened;
the mechanical locking device is matched with the trigger device to form a locking state and an unlocking state under a normal working condition of the mechanical locking device for the sliding pair III, and the basin seat is in sliding fit with the bottom plate under the unlocking state so that the sliding pair III can provide relative displacement for the normal working condition; in a locking state, the basin seat is fixedly connected with the bottom plate, so that the sliding pair III is locked;
the friction pendulum support assembly further comprises a pre-tightening structure for restraining the sliding pair I under normal working conditions, so that the restraining force of the sliding pair I can be relieved when the sliding pair III is locked.
2. The mechanical locking friction pendulum seismic mitigation and isolation bearing of claim 1, wherein the friction pendulum bearing assembly further comprises an upper curved surface sliding plate, and the upper curved surface sliding plate is embedded in a groove at the top of the spherical crown lining plate, so that a sliding pair I is formed between the spherical crown lining plate and the upper bearing plate.
3. The mechanical locking friction pendulum seismic mitigation and isolation bearing according to claim 1, wherein the friction pendulum bearing assembly further comprises a middle curved surface sliding plate, and the middle curved surface sliding plate is embedded in an inner concave groove at the top of the basin seat, so that a sliding pair II is formed between the lower curved surface of the spherical crown lining plate and the basin seat.
4. The mechanical locking friction pendulum seismic mitigation and isolation support seat according to claim 1, wherein the friction pendulum support seat assembly further comprises a lower plane sliding plate, and the lower plane sliding plate is embedded in a groove on the lower surface of the basin seat, so that the basin seat and a stainless steel plate fixed on the bottom plate form a sliding pair III.
5. The mechanical locking friction pendulum seismic mitigation and isolation bearing of claim 1, wherein the pre-tightening structure comprises a shear-resistant block and a shear-resistant pin I, the shear-resistant block is fixed on the basin seat, and the shear-resistant pin I is used for fixing the upper support plate and the shear-resistant block.
6. The mechanical locking friction pendulum seismic mitigation and isolation bearing according to any one of claims 1 to 5, wherein said triggering device is an active recognition seismic device or a passive recognition seismic device; preferably, the passive identification seismic device is a velocity locker; preferably, the active recognition seismic device is a velocity sensor or an acceleration sensor.
7. The mechanical locking friction pendulum seismic mitigation and isolation bearing according to claim 6, wherein the speed locker comprises piston rods and piston cylinders symmetrically arranged on two sides of the basin seat, a locking rod arranged between the two piston cylinders, and a second shear-resistant pin arranged on the locking rod, wherein the locking rod penetrates through the bottom of the basin seat and has a certain gap with a preformed hole of the basin seat, and the second shear-resistant pin axially penetrating through the locking rod is axially fixed relative to the basin seat; and the locking rod is provided with a matching key matched with the mechanical locking device.
8. The mechanical locking friction pendulum seismic mitigation and isolation support seat according to claim 7, wherein the mechanical locking device comprises a guide sleeve, an elastic member and a latch accommodated in the guide sleeve, and a rack fixedly arranged on a bottom plate, the rack is arranged in parallel with the locking rod and penetrates through the bottom of the basin seat, and the mating key is accommodated in the guide sleeve and can move synchronously along the axial direction of the locking rod along with the locking rod, wherein the guide sleeve is fixedly connected with the basin seat, so that under normal working conditions, the mating key is positioned between the elastic member and the latch, and the elastic member is pre-pressed between the bottom of the guide sleeve and the mating key, so that the latch and the rack are not in contact with each other; when an earthquake occurs, the triggering device triggers the locking rod and the basin seat to move relatively, and drives the matching key to displace so that the elastic piece acts on the latch to enable the latch to be meshed with the rack.
9. The mechanical locking friction pendulum seismic mitigation and isolation bearing according to claim 6, wherein the mechanical locking device is a shear pin arranged on a bottom plate, so that when the triggering device recognizes that an earthquake is coming or happening, the basin base is fixed through the shear pin to lock the sliding pair III.
10. The mechanical locking friction pendulum vibration reduction and isolation support seat according to claim 6, wherein the mechanical locking device comprises a driving mechanism, a pressing plate, a meshing plate and a pre-pressing spring, the driving mechanism is in signal connection with the speed sensor or the acceleration sensor, the meshing plate is fixedly connected with the basin seat, meshing teeth B corresponding to the meshing teeth A on the pressing plate are arranged on the meshing plate, the pressing plate and the bottom plate are in limited sliding connection in the vertical direction, the pressing plate is respectively matched with the driving mechanism and the pre-pressing spring, and the pre-pressing spring is arranged on the bottom plate and acts on the pressing plate, so that under the normal working condition, the pressing plate is separated from the meshing plate under the action of the pre-pressing spring; when the speed sensor or the acceleration sensor identifies that an earthquake comes, the driving mechanism can be triggered to act, and the meshing teeth A on the driving pressing plate are meshed with the meshing teeth B on the meshing plate.
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| CN202011122517.XA CN112195765A (en) | 2020-10-20 | 2020-10-20 | Mechanical locking friction pendulum vibration reduction and isolation support |
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| CN202011122517.XA CN112195765A (en) | 2020-10-20 | 2020-10-20 | Mechanical locking friction pendulum vibration reduction and isolation support |
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Cited By (1)
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|---|---|---|---|---|
| CN113652956A (en) * | 2021-08-13 | 2021-11-16 | 成都市新筑交通科技有限公司 | Novel friction pendulum support |
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Effective date of registration: 20210325 Address after: 611430 Xinjin Industrial Park, Xinjin County, Chengdu City, Sichuan Province Applicant after: CHENGDU XINZHU ROAD & BRIDGE MACHINERY Co.,Ltd. Applicant after: Chengdu Xinzhu Transportation Technology Co., Ltd Address before: 611430 Xinjin Industrial Park, Xinjin County, Chengdu City, Sichuan Province Applicant before: CHENGDU XINZHU ROAD & BRIDGE MACHINERY Co.,Ltd. |