CN117403532A - Self-adaptive damping limiting device and bridge - Google Patents
Self-adaptive damping limiting device and bridge Download PDFInfo
- Publication number
- CN117403532A CN117403532A CN202311713252.4A CN202311713252A CN117403532A CN 117403532 A CN117403532 A CN 117403532A CN 202311713252 A CN202311713252 A CN 202311713252A CN 117403532 A CN117403532 A CN 117403532A
- Authority
- CN
- China
- Prior art keywords
- shell
- screw rod
- anchor
- energy consumption
- anchor cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 70
- 238000005265 energy consumption Methods 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 31
- 230000003044 adaptive effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000010248 power generation Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 238000013519 translation Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 26
- 238000006073 displacement reaction Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 description 17
- 230000033001 locomotion Effects 0.000 description 12
- 230000035939 shock Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001739 rebound effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a self-adaptive damping limiting device and a bridge, which relate to the field of bridges and aim at solving the damping and limiting problems that the current damping device is difficult to adapt to larger displacement of a lower beam body of an earthquake with different intensities, a plurality of wheel shafts in a shell are sequentially connected in series through anchor cables, the anchor cables are pulled to drive the wheel shafts to translate and then drive a screw rod and an inertial energy consumption assembly to rotate, the self-adaptive damping limiting device has the advantage of self-adaptively adjusting the output force and the energy consumption efficiency of the end part of the anchor cable according to the intensity of the earthquake, and combines a return spring to resist the reciprocating action of the earthquake, the release amount of the anchor cable in the earthquake-resistant process is increased in the form of the anchor cable with multiple sections of bending, the larger displacement scene of the beam body is adapted, and the damping energy consumption and limiting requirements of the beam bridge are met.
Description
Technical Field
The invention relates to the field of bridges, in particular to a self-adaptive damping limiting device and a bridge.
Background
The assembled small and medium span beam bridge adopts a plate type rubber support, the beam body is directly placed on the support, and the support is in non-bolt connection with the beam bottom and the capping beam (pier, table) top. A large number of earthquake damages show that the support arrangement form easily generates relative sliding between the bottom of the beam and the top surface of the support under the action of an earthquake, so that the beam body is displaced greatly, even falls down, and life traffic lines are threatened to be smooth.
The seismic design specification of the girder bridge requires that the main girder of the assembled girder bridge has definite and reliable displacement constraint in the transverse bridge direction and the longitudinal bridge direction, and can effectively control the structural seismic displacement and prevent girder falling. In engineering practice, an anti-seismic anchor bolt is generally arranged between the main beam and the cover beam (pier and table) to limit the relative horizontal displacement between the main beam and the cover beam (pier and table). The traditional anti-seismic anchor bolt has simple structure and poor deformation capability, generally has only the most basic limiting function, does not have the capability of damping and dissipating energy, and is easy to shear and fail under the reciprocating action of an earthquake. When the conventional damping energy consumption equipment is applied to bridge earthquake resistance, the problem that the end output and the energy consumption efficiency cannot be adaptively adjusted according to the earthquake intensity generally exists. In China patent (publication No. CN 106835947B), a multidimensional damping device is disclosed, a propeller type energy consumption device is driven by a main cable to move in a steel box and rub against a viscoelastic material in the steel box, so that energy consumption is realized; however, the energy consumption form is single, the reciprocating action of earthquake, especially high-strength earthquake, cannot be effectively resisted, and the energy consumption displacement of the propeller energy consumption device is limited by the resetting capability of the rubber backing plate, so that the propeller energy consumption device cannot cope with a larger beam displacement scene. Therefore, the shock-resistant anchor bolts and the shock-absorbing and energy-consuming equipment in the prior art are difficult to meet the shock-absorbing and energy-consuming and limiting requirements of the beam bridge.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a self-adaptive damping limiting device and a bridge, wherein a plurality of wheel shafts in a shell are sequentially connected in series through anchor cables, the anchor cables are pulled to drive the wheel shafts to translate and then drive a screw rod and an inertial energy consumption assembly to rotate, the self-adaptive damping limiting device has the advantages of self-adaptively adjusting the output force and the energy consumption efficiency of the end part of the anchor cable according to the earthquake intensity, and the self-adaptive damping limiting device combines a return spring to resist the earthquake reciprocating action, increases the release amount of the anchor cable in the earthquake-resistant process in a multi-section bending anchor cable mode, adapts to larger displacement scenes of a beam body, and meets the damping energy consumption and limiting requirements of the beam bridge.
The first object of the invention is to provide a self-adaptive damping limiting device, which adopts the following scheme:
the device comprises a shell and an anchor cable, wherein a plurality of axles are arranged in the shell at intervals along the extending direction of a vertical central line of the shell, each axle is connected with a screw rod through a transmission mechanism, the end part of the screw rod is in running fit with the shell, a sheave is arranged on the axle in a penetrating way, an inertial energy consumption assembly is coaxially arranged on the screw rod, and the transmission mechanism converts the translation of the axle into the rotation of the screw rod so as to drive the inertial energy consumption assembly and viscous damping liquid filled in the shell to form a damping effect; the wheel axle is connected with the shell through a first reset spring;
one end of the anchor cable is fixed, the other end sequentially bypasses the grooved wheels on the wheel shaft and then passes through the shell to be connected with the anchor device, the anchor cable forms a multi-section bending structure in the shell, and the wheel shaft is driven to axially translate along the screw rod through tensioning.
Further, the transmission mechanism comprises a sliding block, the sliding block is matched with a threaded section of the screw rod to form a screw rod sliding block mechanism, two ends of the wheel shaft are respectively matched with the corresponding screw rod through the sliding block, the axis of the screw rod is perpendicular to the axis of the wheel shaft, and the axis of the screw rod is coplanar with the plane where the translational track of the wheel shaft is located.
Further, the grooved pulley is matched with the wheel shaft through a first bearing, and the end part of the lead screw is arranged on the inner wall of the shell through a second bearing; the inertial energy consumption component is mounted to the screw rod through a ratchet and pawl mechanism.
Further, the inertial energy consumption assembly comprises a rotating blade and an inertial element which are arranged on a non-threaded section of the screw rod, a plurality of through holes are eccentrically formed in the end face of the inertial element, a slide way which is arranged along the radial direction is arranged in the inertial element, a mass block is in sliding fit with the slide way, the mass block is connected with one end of a second reset spring, and the other end of the second reset spring is connected with one centripetal end of the slide way.
Further, the end part of the screw rod is connected with a rotary power generation unit, the rotary power generation unit is connected with an excitation coil, viscous damping liquid adopts magnetorheological fluid, and the magnetorheological fluid can act on a distribution area of the inertial energy consumption assembly when the excitation coil is electrified so as to change the viscosity of the magnetorheological fluid.
Further, the fixed end of the anchor cable is positioned outside the end face of the shell and is connected with an anchor block, a piezoelectric unit is arranged between the anchor block and the end face of the shell, and the piezoelectric unit is connected with an excitation coil;
the exciting coil is fixed on the inner wall of the shell, and the inertial energy element is positioned between the rotating blade of the inertial energy consumption component and the exciting coil.
Further, the wheel shafts are distributed on two sides of the axis of the shell, one end of each anchor rope is fixed at the center of one end of the shell, the other end of each anchor rope penetrates through the center of the other end of the shell and then is connected with an anchor device, and in the tensioning and straightening process of the anchor rope in the shell, the grooved wheels and the wheel shafts are driven to move towards the vertical center line of the shell.
Further, one end of the anchor cable penetrates through the capping beam and then is connected with an anchor device, an anchor backing plate is arranged between the anchor device and the bottom surface of the capping beam, a corrugated pipe for the anchor cable to penetrate through is arranged on the capping beam at the abutting position of the anchor backing plate, and a spiral reinforcing steel bar buried in the capping beam is sleeved outside the corrugated pipe.
A second object of the present invention is to provide a bridge utilizing the adaptive damping limiting device as described in the first object.
Further, a plurality of adaptive damping devices are connected between the cover beam and the upper structure end diaphragm of the bridge, wherein the shell is arranged in the upper structure end diaphragm, and the anchor is arranged on the cover beam.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) Aiming at the problem that the current damping device is difficult to adapt to changeable earthquake scenes, the wheel axle drives the inertial energy consumption assembly to rotate, so that the force output at the end part of the tendon anchor rope can be adaptively adjusted under different earthquake intensities, and the relative displacement between the upper structure diaphragm beam and the bridge abutment cap beam is controlled; in addition, the rotation energy of the inertial energy consumption assembly generates electric energy to excite the exciting coil, the viscosity of the magnetorheological fluid is changed through the exciting coil, so that the damping action intensity is changed, and the larger the seismic intensity is, the larger the rotation energy of the inertial energy consumption assembly generates electric energy, the larger the damping action intensity of the magnetorheological fluid is, so that the energy consumption efficiency is adaptively improved, and the bridge shock hazard is reduced.
(2) The traditional steel anchor bolt rod is replaced by a more flexible anchor rope, so that the common problem that the steel anchor bolt rod is sheared along the upper section of the bent cap under the reciprocating earthquake action is avoided, and the reliability of the limiting function is improved. On the basis of basic limiting function, the deformation capacity of the device is increased to adapt to changeable vibration scenes in earthquake, a plurality of wheel shafts in the shell are sequentially connected in series through anchor cables, the release amount of the anchor cables in the earthquake-resistant process is increased in a multi-section bending anchor cable mode, and the device is suitable for larger displacement scenes of the beam body.
(3) In the earthquake reciprocating motion, when the relative displacement of the upper structure diaphragm beam and the capping beam is reduced, elastic potential energy accumulated in the first reset spring is released to reset the grooved pulley and the anchor cable, and in the resetting process, the rotary energy consumption element does not need to reset and rotate along with the screw rod, and the reset resistance is reduced through the characteristics of the ratchet pawl mechanism, so that the grooved pulley and the anchor cable are easier to reset.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a schematic structural view of an adaptive damping limiting device in embodiments 1 and 2 of the present invention.
Fig. 2 is a schematic installation view of the adaptive damping limiting device in embodiments 1 and 2 of the present invention.
Fig. 3 is a schematic cross-sectional view at A-A in fig. 1.
Fig. 4 is a schematic diagram of a screw connection inertial energy consuming assembly and housing according to embodiments 1 and 2 of the present invention.
Fig. 5 is a schematic diagram of the inertial device in examples 1 and 2 of the present invention.
Fig. 6 is a schematic view of the ratchet-pawl mechanism in embodiments 1 and 2 of the present invention.
Fig. 7 is a schematic view of the wheel axle mating sheave and slider of embodiments 1 and 2 of the present invention.
Fig. 8 is a schematic diagram of a rotary power generation unit in embodiments 1 and 2 of the present invention.
Wherein, 1-the shell; 2-anchoring the base; 3-protecting cover; 4-anchoring blocks; a 5-piezo-electric unit; 6-anchor cables; 7-grooved wheels; 71-a first bearing; 8-a first return spring; 9-a lead screw; 91-thread segments; 92-non-threaded section; 93-a slider; 94-balls; 10-inertial element; 101-a through hole; 102-a slideway; 103-mass block; 104-a second return spring; 11-rotating the paddles; 12-a second bearing; 13-exciting coil; 14-a rotary power generation unit; 141-stator housing; 142-stator core; 143-permanent magnets; 144-rotor yoke; 145-stator windings; 15-magnetorheological fluid; 16-a pilot outlet; 17-bellows; 18-spiral reinforcing steel bars; 19-anchor pad; 20-an anchor; 21-wheel axle; 22-ratchet and pawl mechanism; 221-internal teeth; 222-pawl; 223-a third return spring; 23-superstructure end spreader beams; 24-a capping beam; 25-supporting seats; 26-supporting a stone; 27-guide plate.
Detailed Description
Example 1
In an exemplary embodiment of the present invention, an adaptive shock absorbing stop device is provided as shown in fig. 1-8.
The adaptive damping limiting device is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the adaptive damping limiting device mainly comprises a shell 1, a wheel axle 21, a transmission mechanism, an anchor cable 6 and a damping mechanism. The transmission mechanism, the wheel shaft 21 and the damping mechanism are arranged in the shell 1, the damping mechanism comprises a screw rod 9 and an inertial energy consumption component, the wheel shaft 21 is matched with the screw rod 9 through the transmission mechanism, the anchor cable 6 acts on the wheel shaft 21 to enable the wheel shaft 21 to translate, the transmission mechanism converts the translation of the wheel shaft 21 into the rotation of the screw rod 9 so as to drive the inertial energy consumption component arranged on the screw rod 9 to rotate, viscous damping liquid is filled in the shell 1, and the rotary damping component interacts with the viscous damping liquid when rotating, so that damping action is generated on the rotation of the screw rod 9, damping action is generated on the translation of the wheel shaft 21, and extension of the anchor cable 6 is resisted, so that energy consumption and shock absorption are realized.
Referring to fig. 1 and 3, a structure inside the housing 1 is described, a plurality of wheel shafts 21 are arranged in the housing 1, the wheel shafts 21 are sequentially arranged at intervals along the extending direction of the vertical central line of the housing 1, each wheel shaft 21 is respectively connected with a screw rod 9 through a transmission mechanism, the end part of the screw rod 9 is rotationally connected with the housing 1, the screw rod 9 can rotate around the axis thereof to rotate the screw rod 9, a inertial energy consumption assembly is coaxially arranged on the screw rod 9, and the wheel shafts 21 are penetrated with a matched grooved wheel 7.
As shown in fig. 1, the axis of the housing 1 is the vertical center line of the housing 1 mounted on the upper structural end diaphragm 23, and when the anchor cable 6 in the housing 1 is completely straightened, the axis of the anchor cable 6 coincides with the axis of the housing 1. The sheave 7 is in running fit with the wheel shaft 21, the anchor cable 6 bypasses the sheave 7 and applies translational motion to the wheel shaft 21 through the sheave 7, the wheel shaft 21 drives the sheave 7 to rotate when translating relative to the shell 1 under the action of the anchor cable 6, and meanwhile, the translational motion of the wheel shaft 21 is synchronously converted into autorotation of the lead screw 9 through the transmission mechanism, so that the inertial energy consumption assembly and viscous damping liquid filled in the shell 1 are driven to form damping motion.
As shown in fig. 4, one end of the anchor cable 6 is fixed, the other end sequentially passes through the grooved pulley 7 on the wheel shaft 21 and then passes through the shell 1 to be connected with the anchor 20, the anchor cable 6 forms a multi-section bending structure in the shell 1, and the multi-section bending structure is in a multi-section continuous S shape as shown in fig. 1; in the process of stretching the anchor cable 6 to enable the anchor cable 6 to tend to be straight, the axle 21 can be driven to translate, the axle 21 gradually tends to be straight along with the anchor cable 6 in the shell 1 overcoming the damping action of the axle 21, and the axle 21 gradually approaches to the connecting line between two intersection points of the anchor cable 6 and two ends of the shell 1, namely approaches to the axis of the shell 1.
Conversely, after the anchor cable 6 is gradually and straightly provided with the energy-consumption damping effect, elements in the shell 1 also need to be restored to the original position in the gap of the earthquake reciprocating motion so as to be used for the next energy-consumption damping; in this way, the wheel axle 21 is connected with the shell 1 through the first return spring 8, and the rebound effect is provided through the first return spring 8, so that on one hand, when the wheel axle 21 gradually moves under the action of the anchor cable 6, the elastic force effect of the first return spring 8 is overcome, and the first return spring 8 can store energy, so that the energy consumption and shock absorption capacity are improved; on the other hand, when the anchor cable 6 acts on the rear wheel shaft 21 to restore the position, the first restoring spring 8 releases the accumulated elastic potential energy, and the wheel shaft 21 is driven to restore.
As shown in fig. 1, 3 and 4, the transmission mechanism comprises a sliding block 93, the sliding block 93 is matched with a threaded section 91 of a screw rod 9 to form a screw rod sliding block mechanism, two ends of a wheel shaft 21 are respectively matched with the corresponding screw rod 9 through the sliding block 93, the axis of the screw rod 9 is perpendicular to the axis of the wheel shaft 21, the axis of the screw rod 9 is coplanar with the plane of the translational track of the wheel shaft 21, the wheel shaft 21 is connected with the sliding block 93 matched with the screw rod 9, and the sliding block 93 controls the movement path of the wheel shaft 21 along the movement of the screw rod 9, so that the wheel shaft 21 can form the required translational motion.
The end of the lead screw 9 is arranged on the inner wall of the shell 1, the lead screw 9 is provided with a threaded section 91 and a non-threaded section 92, the position of the threaded section 91 is matched with the sliding block 93 to form a lead screw sliding block mechanism, the non-threaded section 92 is used for mounting inertial energy consumption components, meanwhile, the two ends of the lead screw 9 are both the non-threaded section 92, the grooved pulley 7 is matched with the wheel shaft 21 through the first bearing 71, the end of the lead screw 9 is arranged on the inner wall of the shell 1 through the second bearing 12, and the sliding block 93 drives the lead screw 9 to rotate when translating along the axial direction of the lead screw 9.
As shown in fig. 3, in this embodiment, two ends of the same axle 21 are respectively connected with a sliding block 93, and balls 94 are filled between the sliding block 93 and the matched threaded section 91 to form a ball screw mechanism, so that friction loss is reduced. Correspondingly, the sliding blocks 93 at two ends of the wheel shaft 21 are distributed and matched with the screw rods 9, so that the two ends of the wheel shaft 21 are simultaneously subjected to damping action, the stress uniformity of the screw rods is improved, the matching state of the sliding blocks 93 and the threaded sections 91 of the screw rods 9 is shown in fig. 4, when the grooved pulley 7 drives the wheel shaft 21 to translate, the sliding blocks 93 connected with the wheel shaft 21 axially move along the screw rods 9, and the screw rods 9 rotate, so that the inertial energy consumption assembly installed on the unthreaded sections 92 of the screw rods 9 realizes rotation energy consumption.
The screw rod 9 is arranged on a preset mounting hole on the inner wall of the shell 1 through a second bearing 12, the inner ring of the second bearing 12 is connected with the screw rod 9, and the outer ring of the second bearing 12 is connected with the inner wall of the shell 1. The sheave 7 is mounted on the axle 21 by means of a first bearing 71, and the anchor cable 6 is wound around the sheave 7 in the groove and held in abutment as shown in fig. 7.
The sheave 7 rotates to connect the axle 21, and the anchor rope 6 generates relative motion with the outer circumferential surface of the sheave 7 in the straightening or bending process, so that the sheave 7 rotates, and in order to convert the position change of the anchor rope 6 into the translation of the axle 21, the rotation of the sheave 7 absorbs the axial motion of the anchor rope 6 along the anchor rope 6, and keeps the translation transmission to the axle 21, so that the axle 21 forms the required translation. As shown in fig. 4, 5 and 6, the inertial energy consumption assembly is mounted to the screw rod 9 through the ratchet and pawl mechanism 22, the inertial energy consumption assembly comprises a rotating blade 11 mounted on a non-threaded section 92 of the screw rod 9 and an inertial element 10, a plurality of through holes 101 are eccentrically formed in the end face of the inertial element 10, a slide way 102 arranged in the radial direction is arranged in the inertial element 10, a mass block 103 is slidably matched with the slide way 102, the mass block 103 is connected with one end of a second reset spring 104, and the other end of the second reset spring 104 is connected with the centripetal end of the slide way 102.
The rotary blade 11 and the inertial element 10 are respectively arranged on the non-threaded section 92 of the screw rod 9 through corresponding ratchet and pawl mechanisms 22 to form a unidirectional driving effect, when the tension anchor cable 6 drives the wheel shaft 21 to translate so as to drive the screw rod 9 to rotate, the ratchet and the pawl 222 are meshed to transfer torque, and the screw rod 9 can drive the rotary blade 11 and the inertial element 10 to rotate so as to realize energy consumption; after the energy consumption is finished, when the wheel shaft 21 is reset and translated under the drive of the first reset spring 8 to drive the screw rod 9 to reversely rotate, the transmission of torque between the ratchet wheel and the pawl 222 is cut off, and the reverse rotation of the screw rod 9 can not drive the rotation of the rotating blade 11 and the inertial element 10, so that the reset resistance is reduced.
For the ratchet pawl mechanism 22, as shown in fig. 5 and 6, internal teeth 221 are arranged in the ratchet, a pawl 222 is connected to a non-threaded section 92 of the screw rod 9, meanwhile, a third return spring 223 is connected to the pawl 222, and when the screw rod 9 rotates in a first direction in an energy consumption state, the pawl 222 is meshed with the internal teeth 221 under the action of the third return spring 223 to drive the inertia energy consumption assembly to rotate together; when the screw rod 9 is in a reset state and rotates in a second direction opposite to the first direction, the pawl 222 is not meshed with the internal teeth 221 for transmission, and the inertial energy consumption component is not rotated along with the reverse rotation of the screw rod 9, so that the resistance of the retraction of the anchor cable 6 during reset is greatly reduced.
For the inertial element 10, as shown in fig. 5, the inertial element 10 has a disc structure as a whole, and a plurality of through holes 101 are eccentrically arranged relative to the axis of the inertial element, when a plurality of through holes 101 are arranged, the through holes 101 can be uniformly distributed along the circumferential direction, and viscous damping liquid can pass through the through holes 101 to provide damping effect when the inertial element 10 rotates. In addition, a slide way 102 which is arranged radially is arranged between the through holes 101, the slide way 102 is in sliding fit with a mass block 103, and a second reset spring 104 is connected with the mass block 103 and one end, close to the center of a circle, of the slide way 102. When the inertial element 10 rotates, the mass slide blocks 93 move along the slide ways 102 to the centrifugal direction under the action of centrifugal force, the faster the rotating speed is, the longer the sliding distance is, the larger the inertial action is provided, so that the output force of the end part of the anchor cable 6 is adaptively changed; the inertial element 10 in the embodiment matches the output of the anchor cable 6, and the through hole 101 formed on the inertial element 10 assists the inertial element 10 to stop after rotation. The inertial element 10 is added to resist the inertia of the anchor cable 6 during the rapid extraction, so that the damage caused by the rapid extraction of the anchor cable 6 is avoided, and the excessively rapid speed change of the anchor cable 6 is overcome through the variable inertial effect of the inertial element 10 during the autorotation. As shown in fig. 3 and 4, the rotary blade 11 is provided with a plurality of blades distributed around the axis of the screw shaft 9, and the blades are subjected to the resistance action of viscous damping liquid when rotating, so that energy consumption is realized.
In this embodiment, the magnetorheological fluid 15 is adopted as viscous damping fluid, the viscous damping fluid is filled in the housing 1, the end part of the screw rod 9 is connected with the rotary power generation unit 14, the rotary power generation unit 14 is connected with the exciting coil 13, and the exciting coil 13 can act on the magnetorheological fluid 15 in the distribution area of the inertial energy consumption component when being electrified so as to change the viscosity of the magnetorheological fluid 15.
In addition, the fixed end of the anchor cable 6 is positioned outside the end face of the shell 1 and is connected with an anchor block 4, a piezoelectric unit 5 is arranged between the anchor block 4 and the end face of the shell 1, and the piezoelectric unit 5 is connected with an excitation coil 13; the exciting coil 13 is fixed on the inner wall of the shell 1, and the inertial element 10 is positioned between the rotating blade 11 and the exciting coil 13 of the inertial energy consuming assembly of the same group.
The piezoelectric unit 5, the rotary power generation unit 14 and the exciting coil 13 form a loop, and in order to ensure that the exciting coil 13 can work normally, corresponding common electrical elements such as rectifying and filtering elements and the like can be arranged in the loop so as to ensure that the exciting coil 13 can form an electromagnetic field acting on magnetorheological fluid 15 in the shell 1, thereby realizing semi-active control damping effect.
The rotary power generation unit 14 may employ a conventional power generation element such as a generator, and in this embodiment, as shown in fig. 8, the rotary power generation unit 14 is composed of a rotor and a stator. The periphery of the end part of the screw rod 9 is provided with a rotor in an interference manner, the rotor consists of a rotor magnetic yoke 144 and a permanent magnet 143, and the permanent magnet 143 is attached to the surface of the rotor magnetic yoke 144; the rotor periphery is provided with a stator core 142, and stator windings 145 are provided on the stator core 142. A stator case 141 is fixed to the outer circumference of the stator core 142; a wire outlet is reserved on the stator shell 141, so that the wire passes through the wire outlet and is connected with the exciting coils 13 on two sides of the screw rod 9.
As shown in fig. 1 and 2, the wheel shafts 21 are distributed on two sides of the axis of the casing 1, one end of the anchor cable 6 is fixed at the center of one end of the casing 1, the other end of the anchor cable passes through the center of the other end of the casing 1 and then is connected with the anchor 20, and in the tensioning and straightening process of the anchor cable 6 in the casing 1, the grooved wheels 7 and the wheel shafts 21 are driven to move towards the axis direction of the casing 1.
One end of the anchor cable 6 passes through the capping beam 24 and then is connected with the anchor device 20, an anchor backing plate 19 is arranged between the anchor device 20 and the bottom surface of the capping beam 24, a corrugated pipe 17 for the anchor cable 6 to pass through is arranged on the capping beam 24 at the abutting position of the anchor backing plate 19, and a spiral reinforcing steel bar 18 buried in the capping beam 24 is sleeved outside the corrugated pipe 17.
Specifically, shell 1 one end is installed in anchor base 2, and anchor rope 6 is connected the one end of anchor piece 4 and is provided with safety cover 3 outward, and safety cover 3 is connected in anchor base 2, and shell 1 and its inside cavity that fills viscous damping liquid are square cross-section to, the wall thickness of shell 1 can set up to 3-5mm.
The anchor cable 6 passes the trompil of shell 1 bottom terminal surface position department and is the direction export 16, and the tip processing of direction export 16 is the arc surface, reduces the damping when anchor cable 6 turns to reduce anchor cable 6's jamming risk and wearing and tearing problem.
In the application of a real bridge, the shell 1 is buried in a transverse beam of an upper structure, the shell is specifically arranged in a transverse beam 23 of an end of the upper structure, a corrugated pipe 17 is buried in a bent cap 24 of the lower structure, after an anchor cable 6 extends out of a guide outlet 16, the corrugated pipe 17 extends into the lower structure through the heights of a support 25 and a support cushion stone 26 and is anchored on the bottom surface of the bent cap 24 of the lower structure through an anchor cushion 19 and an anchor 20, spiral reinforcing steel bars 18 are arranged around the anchor cushion 19 to disperse anchoring pressure, and a guide plate 27 is buried in the flush position of the top of the corrugated pipe 17 and the top surface of the bent cap 24 of the lower structure so as to reduce the resistance when the anchor cable 6 turns and prevent the anchor cable 6 from being clamped or worn.
When an earthquake happens, the upper structure end diaphragm beam 23 and the cover beam 24 of the lower structure reciprocate, when the relative displacement is increased, the anchor cable 6 is pulled out, the piezoelectric unit 5 receives the pressure action of the anchoring block 4 to generate electricity, meanwhile, the grooved pulley 7 drives the wheel shaft 21 to horizontally move towards the axis direction of the shell 1 under the action of the resultant force of the anchor cable 6, the screw rods 9 of the same group rotate, the inertial container element 10 and the rotary blade 11 are driven to rotate together through the ratchet pawl mechanism 22, the output of the end part of the anchor cable 6 is increased, and energy consumption is provided. The rotation of the screw rod 9 drives the rotary power generation unit 14 to work simultaneously, and the current generated by the piezoelectric unit 5 is used for electrifies the exciting coil 13 to generate a magnetic field, so that the magnetorheological fluid 15 becomes viscous, the damping effect is enhanced, and the energy consumption capability is improved.
Along with the increase of the earthquake action intensity, the rotating speed of the inertial container element 10 is correspondingly faster, the sliding distance from the mass block 103 to the edge of the disc outer ring along the radial slideway 102 is longer under the action of centrifugal force, and the rotation inertia coefficient is increased, so that the output force of the end part of the anchor cable 6 is adaptively improved, and the adaptive adjustment of the output force of the end part of the anchor cable 6 under the earthquake with different intensities is realized.
Meanwhile, as the action intensity of the earthquake increases, the rotation speed of the rotary power generation unit 14 increases, and meanwhile, the larger the tensile force applied to the anchor cable 6 is, the larger the pressure of the anchor block 4 to the piezoelectric unit 5 is, so that the generated current is larger, the magnetic field generated by the exciting coil 13 is also enhanced, and the viscosity of the magnetorheological fluid 15 is further increased, so that the energy consumption effect is improved, and the semi-active control of the energy consumption effect under the earthquake with different intensities is realized.
The first return spring 8 accumulates elastic potential energy during the pulling out of the anchor line 6. In the earthquake reciprocating motion, when the relative displacement between the upper structure end diaphragm beam 23 and the cover beam 24 of the lower structure is reduced, the first reset spring 8 releases elastic potential energy to pull the wheel shaft 21 to reset, at the moment, the screw rod 9 reversely rotates, the pawl 222 in the ratchet clamping jaw mechanism is not meshed with the inner teeth 221, the rotation connection of the inertial element 10 and the rotating blade 11 is disconnected, the retraction resistance of the anchor cable 6 is reduced, in addition, in the retraction process of the anchor cable 6, the screw rod 9 rotationally drives the rotary power generation unit 14 to supply power for the exciting coil 13, the damping effect of the magnetorheological fluid 15 is increased, the through hole 101 of the inertial element 10 cuts and the rotating blade 11 agitates the magnetorheological fluid 15, the rotation is gradually stopped, and the resistance of the screw rod 9 in resetting due to the viscosity change of the magnetorheological fluid 15 is far smaller than the resistance for driving the inertial energy consumption component to rotate and reset, so that the effect of reducing the reset resistance can be good, and the anchor cable 6 is pulled out to continue to play a role in the next reciprocating motion.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 1-8, a bridge is provided.
With the adaptive shock absorbing and limiting device as in embodiment 1, a plurality of adaptive shock absorbing and limiting devices are connected between the upper structural end diaphragm beam 23 and the capping beam 24 of the bridge, the shell 1 is embedded in the upper structural end diaphragm beam 23, the anchor 20 is arranged in the capping beam 24, and the anchor cable 6 connects the shell 1 in the interior and the anchor 20 in the capping beam 24.
The damping and energy-consuming action process and effect of the adaptive damping and limiting device are described in embodiment 1, and are not repeated here. The wheel shafts 21 drive the inertial energy consumption components to rotate so as to disturb viscous damping liquid to realize energy consumption, the wheel shafts 21 positioned in the shell 1 are sequentially connected in series through the anchor cables 6, the wheel shafts 21 are combined with the lead screw 9 and the inertial energy consumption components to respectively form damping action to cooperatively consume energy, the return spring is combined to resist earthquake reciprocating action, the anchor cables 6 which are bent in a multi-section mode increase the release amount in the earthquake-resistant process, the larger displacement scene of the girder body is adapted, and the damping energy consumption requirement of the girder bridge is met.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The self-adaptive damping limiting device is characterized by comprising a shell and an anchor rope, wherein a plurality of wheel shafts are arranged in the shell at intervals along the extending direction of a vertical central line of the shell, each wheel shaft is connected with a screw rod through a transmission mechanism, the end part of the screw rod is in rotating fit with the shell, a sheave is arranged on the wheel shaft in a penetrating way, an inertial energy consumption component is coaxially arranged on the screw rod, and the transmission mechanism converts the translation of the wheel shaft into the rotation of the screw rod so as to drive the inertial energy consumption component and viscous damping liquid filled in the shell to form a damping effect; the wheel axle is connected with the shell through a first reset spring;
one end of the anchor cable is fixed, the other end sequentially bypasses the grooved wheels on the wheel shaft and then passes through the shell to be connected with the anchor device, the anchor cable forms a multi-section bending structure in the shell, and the wheel shaft is driven to axially translate along the screw rod through tensioning.
2. The adaptive damping limiting device according to claim 1, wherein the transmission mechanism comprises a slider, the slider is matched with a threaded section of a screw rod to form a screw rod slider mechanism, two ends of a wheel shaft are respectively matched with the corresponding screw rod through the slider, the axis of the screw rod is perpendicular to the axis of the wheel shaft, and the axis of the screw rod is coplanar with a plane of a translational track of the wheel shaft.
3. The adaptive damping limiting device according to claim 2, wherein the grooved pulley is matched with the wheel shaft through a first bearing, and the end part of the screw rod is mounted on the inner wall of the shell through a second bearing;
the inertial energy consumption component is mounted to the screw rod through a ratchet and pawl mechanism.
4. The adaptive damping and limiting device according to claim 1, wherein the inertial energy consumption assembly comprises a rotating blade and an inertial element which are arranged on a non-threaded section of the screw rod, a plurality of through holes are eccentrically arranged on the end face of the inertial element, a slide way which is arranged along the radial direction is arranged in the inertial element, a mass block is in sliding fit with the slide way, the mass block is connected with one end of a second reset spring, and the other end of the second reset spring is connected with one centripetal end of the slide way.
5. The self-adaptive damping limiting device according to claim 4, wherein the end part of the screw rod is connected with a rotary power generation unit, the rotary power generation unit is connected with an excitation coil, viscous damping liquid adopts magnetorheological liquid, and the magnetorheological liquid can act on a distribution area of the inertial energy consumption assembly when the excitation coil is electrified so as to change the viscosity of the magnetorheological liquid.
6. The self-adaptive damping limiting device according to claim 5, wherein the fixed end of the anchor cable is positioned outside the end face of the shell and is connected with an anchoring block, a piezoelectric unit is arranged between the anchoring block and the end face of the shell, and the piezoelectric unit is connected with the exciting coil;
the exciting coil is fixed on the inner wall of the shell, and the inertial energy element is positioned between the rotating blade of the inertial energy consumption component and the exciting coil.
7. The self-adaptive damping limiting device according to claim 1, wherein the wheel shafts are distributed on two sides of the axis of the shell, one end of the anchor cable is fixed at the center of one end of the shell, the other end of the anchor cable penetrates through the center of the other end of the shell and then is connected to the anchor, and the sheave and the wheel shafts are driven to move towards the vertical center line of the shell in the tensioning and straightening process of the anchor cable in the shell.
8. The adaptive damping limiting device according to claim 1, wherein one end of the anchor cable penetrates through the capping beam and then is connected with an anchor device, an anchor pad is arranged between the anchor device and the bottom surface of the capping beam, a corrugated pipe for the anchor cable to penetrate through is arranged on the capping beam at the abutting position of the anchor pad, and a spiral reinforcing steel bar buried in the capping beam is sleeved outside the corrugated pipe.
9. A bridge comprising an adaptive damping limiting device according to any one of claims 1-8.
10. The bridge of claim 9, wherein a plurality of compliant damping devices are connected between the capping beam and the upper structural end rails of the bridge, wherein the shell is disposed within the upper structural end rails and the anchor is mounted to the capping beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311713252.4A CN117403532B (en) | 2023-12-14 | 2023-12-14 | Self-adaptive damping limiting device and bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311713252.4A CN117403532B (en) | 2023-12-14 | 2023-12-14 | Self-adaptive damping limiting device and bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117403532A true CN117403532A (en) | 2024-01-16 |
| CN117403532B CN117403532B (en) | 2024-03-12 |
Family
ID=89489341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311713252.4A Active CN117403532B (en) | 2023-12-14 | 2023-12-14 | Self-adaptive damping limiting device and bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117403532B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08296343A (en) * | 1995-04-27 | 1996-11-12 | Mitsubishi Heavy Ind Ltd | Vertical damper |
| CN1651656A (en) * | 2004-12-07 | 2005-08-10 | 清华大学 | Stayed cable shock attenuation device |
| CN107447645A (en) * | 2017-08-08 | 2017-12-08 | 北京工业大学 | A kind of lock up damping devices based on winding rope amplification mechanism |
| CN108086771A (en) * | 2018-01-22 | 2018-05-29 | 同济大学 | Used appearance shock mitigation system with nonlinear energy trap |
| CN111042370A (en) * | 2019-12-27 | 2020-04-21 | 山东大学 | Semi-active negative stiffness multidimensional vibration damper |
| CN112942609A (en) * | 2021-01-29 | 2021-06-11 | 同济大学 | Variable damping's harmonious viscous damper |
| CN113944097A (en) * | 2021-10-26 | 2022-01-18 | 北京工业大学 | Friction energy consumption-self-reset beam falling prevention device |
| US20220049519A1 (en) * | 2018-11-19 | 2022-02-17 | Yangzhou University | Prestress-free self-centering energy-dissipative tension-only brace |
| CN115288018A (en) * | 2022-07-27 | 2022-11-04 | 兰州理工大学 | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor |
| CN115370186A (en) * | 2022-09-30 | 2022-11-22 | 山东大学 | Multistage semi-active energy consumption reinforcing apparatus of wall body |
| CN115653344A (en) * | 2022-11-09 | 2023-01-31 | 国网河南省电力公司经济技术研究院 | Friction-inertia capacity combined type wall body reinforcing and energy consuming device and wall body |
| CN116043667A (en) * | 2022-12-12 | 2023-05-02 | 中船双瑞(洛阳)特种装备股份有限公司 | Low-frequency tuning mass damper |
| CN116065477A (en) * | 2023-03-22 | 2023-05-05 | 重庆交通大学 | Displacement self-adaptive staged viscous damper with fusing mechanism |
| CN117026776A (en) * | 2023-08-21 | 2023-11-10 | 山东省路桥工程设计咨询有限公司 | Steel and concrete composite beam bridge anti-overturning device |
-
2023
- 2023-12-14 CN CN202311713252.4A patent/CN117403532B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08296343A (en) * | 1995-04-27 | 1996-11-12 | Mitsubishi Heavy Ind Ltd | Vertical damper |
| CN1651656A (en) * | 2004-12-07 | 2005-08-10 | 清华大学 | Stayed cable shock attenuation device |
| CN107447645A (en) * | 2017-08-08 | 2017-12-08 | 北京工业大学 | A kind of lock up damping devices based on winding rope amplification mechanism |
| CN108086771A (en) * | 2018-01-22 | 2018-05-29 | 同济大学 | Used appearance shock mitigation system with nonlinear energy trap |
| US20220049519A1 (en) * | 2018-11-19 | 2022-02-17 | Yangzhou University | Prestress-free self-centering energy-dissipative tension-only brace |
| CN111042370A (en) * | 2019-12-27 | 2020-04-21 | 山东大学 | Semi-active negative stiffness multidimensional vibration damper |
| CN112942609A (en) * | 2021-01-29 | 2021-06-11 | 同济大学 | Variable damping's harmonious viscous damper |
| CN113944097A (en) * | 2021-10-26 | 2022-01-18 | 北京工业大学 | Friction energy consumption-self-reset beam falling prevention device |
| CN115288018A (en) * | 2022-07-27 | 2022-11-04 | 兰州理工大学 | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor |
| CN115370186A (en) * | 2022-09-30 | 2022-11-22 | 山东大学 | Multistage semi-active energy consumption reinforcing apparatus of wall body |
| CN115653344A (en) * | 2022-11-09 | 2023-01-31 | 国网河南省电力公司经济技术研究院 | Friction-inertia capacity combined type wall body reinforcing and energy consuming device and wall body |
| CN116043667A (en) * | 2022-12-12 | 2023-05-02 | 中船双瑞(洛阳)特种装备股份有限公司 | Low-frequency tuning mass damper |
| CN116065477A (en) * | 2023-03-22 | 2023-05-05 | 重庆交通大学 | Displacement self-adaptive staged viscous damper with fusing mechanism |
| CN117026776A (en) * | 2023-08-21 | 2023-11-10 | 山东省路桥工程设计咨询有限公司 | Steel and concrete composite beam bridge anti-overturning device |
Non-Patent Citations (1)
| Title |
|---|
| 王智宇;: "斜拉桥斜拉索摆式杠杆质量阻尼器PLMD减振技术研究", 北方交通, no. 10, 28 October 2015 (2015-10-28), pages 55 - 59 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117403532B (en) | 2024-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10718232B2 (en) | Vibration absorber having an electromagnetic brake for wind turbines | |
| CN102016294B (en) | Wave power plant and transmission | |
| JP5925672B2 (en) | Damping device and structure damping device | |
| KR102547218B1 (en) | An assembly to control or govern relative speed of movement between parts | |
| CN110805348B (en) | Self-resetting rotary inertia capacity damper | |
| JP5805753B2 (en) | Wave power generator, use thereof, and method of generating electrical energy | |
| JP2007529989A (en) | Anti-rotation structure for wave energy converter | |
| EP3165764A1 (en) | Yaw brake for a wind turbine | |
| CN112459587B (en) | Unilateral-tensioning prestress self-balancing inertial volume damper | |
| CN105251144A (en) | Upper air slow descending device based on magnetorheological fluid damper | |
| CN115163723B (en) | Magneto-rheological variable damping vibration attenuation energy consumption device | |
| CN117403532B (en) | Self-adaptive damping limiting device and bridge | |
| CN106835947A (en) | Suspension bridge center button multidimensional vibration reduction device containing viscoplasticity dissipative member and metal-rubber | |
| CN110805520A (en) | Semi-active vibration reduction bidirectional coordinated vibration control device for wind turbine blade and installation method | |
| CN103696909B (en) | There is the wind proof TMD system of electricity generate function | |
| CN115370186B (en) | Multistage semi-active energy consumption reinforcing device for wall | |
| JP6979800B2 (en) | Wind lock mechanism | |
| CN115693566A (en) | Multi-directional multistage semi-active piezoelectric energy-harvesting anti-galloping vibration damper | |
| CN203175501U (en) | Flexible friction reverse wheel | |
| CN110332258B (en) | Friction damping and driving limit actuator | |
| DE102012223153A1 (en) | Electrical energy generating device e.g. wave energy converter has stator that is connected to generator housing, when variable force is smaller than restoring force, and rope-like component is rolled opposite to rolling direction | |
| CN103206482A (en) | Flexible friction reverse wheel | |
| CN114243611A (en) | Emergent controlling means that ends dance of transmission line | |
| EP3680511A1 (en) | Energy recovery system | |
| US20210087842A1 (en) | Novel power generation type electromagnetic damping tuned mass damper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |