CN113832841A - Longitudinal elastic constraint multifunctional seismic reduction and isolation support - Google Patents
Longitudinal elastic constraint multifunctional seismic reduction and isolation support Download PDFInfo
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- CN113832841A CN113832841A CN202111111450.4A CN202111111450A CN113832841A CN 113832841 A CN113832841 A CN 113832841A CN 202111111450 A CN202111111450 A CN 202111111450A CN 113832841 A CN113832841 A CN 113832841A
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- seat plate
- cambered surface
- sliding
- plate
- middle seat
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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
Abstract
The invention discloses a longitudinal elastic constraint multifunctional seismic isolation bearing, which comprises: a lower seat plate; the middle seat plate is connected with the lower seat plate in a sliding mode and is provided with a first cambered surface; the rotating piece is positioned on the middle seat board and is provided with a second cambered surface, and the second cambered surface is contacted with the first cambered surface; the first limiting device is arranged on the rotating part and is abutted against the middle base plate to limit the first cambered surface to slide relative to the second cambered surface, and the connection strength of the first limiting device and the rotating part is smaller than a preset threshold value; the second limiting devices are arranged on the lower seat plate and are respectively positioned on two sides of the middle seat plate along the longitudinal bridge direction to limit the sliding distance of the middle seat plate along the longitudinal bridge direction; and the restraint device comprises a connecting assembly and an elastic piece, and the connecting assembly is connected with the lower seat plate and the elastic piece. The support has the advantages of longitudinal adjustable limiting function and longitudinal elastic restraint, improves the anti-seismic performance, can eliminate the arrangement of a telescopic regulator for a large-span bridge, reduces the maintenance workload, and is favorable for saving the construction cost and the operation cost.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a longitudinal elastic constraint multifunctional seismic mitigation and isolation support.
Background
The damage of earthquake to traffic facilities, especially bridges is often catastrophic, so that certain earthquake-proof measures must be taken by the bridges in earthquake areas. For a long-span continuous beam bridge of a railway in an earthquake region, a conventional continuous beam design system is usually adopted at present, namely a fixed support is arranged at a main pier, and movable supports are arranged at other piers. And the rail telescopic regulator is high in cost and large in design and construction difficulty, and needs to be replaced for many times in the whole life cycle of the bridge, so that the construction cost and the operation cost are increased due to the arrangement of the rail telescopic regulator. In addition, for the bridge design system with the single fixed piers, when an earthquake comes, only the fixed piers bear the action of a longitudinal earthquake, and the fixed piers often need to be made to be large to meet the stress requirement.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention provides a longitudinal elastic constraint multifunctional seismic mitigation and isolation support.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a longitudinal elastic constraint multifunctional seismic isolation and reduction support, which comprises:
a lower seat plate;
the middle seat plate is connected with the lower seat plate in a sliding mode, and the upper part of the middle seat plate is provided with a first cambered surface;
the rotating part is positioned on the middle seat plate and is provided with a second cambered surface, the second cambered surface is in contact with the first cambered surface, and the second cambered surface can rotate at least relative to the first cambered surface;
the first limiting device is arranged on the rotating piece and is abutted against the middle base plate to limit the first cambered surface to slide relative to the second cambered surface, and the connection strength of the first limiting device and the rotating piece is smaller than a preset threshold value;
the second limiting devices are arranged on the lower seat plate and are respectively positioned on two sides of the middle seat plate along the longitudinal bridge direction to limit the sliding distance of the middle seat plate along the longitudinal bridge direction; and the restraint device comprises a connecting assembly and an elastic piece, the connecting assembly is connected with the lower seat plate and the elastic piece, and the elastic piece generates elastic restraint force opposite to the moving direction of the middle seat plate when the middle seat plate slides along the longitudinal bridge direction.
In some embodiments, the connection assembly comprises:
the stop block is arranged on the lower seat plate;
two ends of the guide shaft are respectively arranged on the two stop blocks distributed along the longitudinal bridge direction;
the sliding shaft sleeves comprise first sliding shaft sleeves and second sliding shaft sleeves which are distributed at intervals along the longitudinal bridge direction, and the first sliding shaft sleeves and the second sliding shaft sleeves are sleeved on the guide shaft; the first sliding shaft sleeve is respectively connected with the middle seat plate and the first end of the elastic piece; the second sliding shaft sleeve is respectively connected with the middle seat plate and the second end of the elastic piece; wherein the second end is opposite the first end; and
the stopping shaft sleeve comprises a first stopping shaft sleeve and a second stopping shaft sleeve, the first stopping shaft sleeve and the second stopping shaft sleeve are both installed on the guide shaft, wherein the first stopping shaft sleeve limits the sliding distance of the first sliding shaft sleeve along the longitudinal bridge direction, and the second stopping shaft sleeve limits the sliding distance of the second sliding shaft sleeve along the longitudinal bridge direction.
In some embodiments, the sliding bushing includes:
the force transmission shaft sleeve is connected with the middle seat plate; and
and the guide shaft sleeve is connected with the force transmission shaft sleeve and is respectively positioned at two sides of the stopping shaft sleeve.
In some embodiments, the mid-deck comprises:
the main body is provided with the first cambered surface and is connected with the lower seat plate in a sliding manner;
the first sliding shaft sleeve and the second sliding shaft sleeve are respectively connected with two different retaining arms on the same side; wherein the transverse direction is perpendicular to the longitudinal direction.
In some embodiments, the resilient member comprises at least one of: disc springs, ring springs or coil springs.
In some embodiments, the second stop device comprises:
the fixing plate is arranged on the lower seat plate;
the force transmission plate is positioned between the fixing plate and the middle seat plate; and
the adjusting shaft penetrates through the fixing plate and the force transmission plate and is used for adjusting the distance between the force transmission plate and the middle seat plate.
In some embodiments, the second stop device further comprises:
and the positioning gasket is sleeved on the connecting shaft and is positioned between the fixed plate and the force transmission plate.
In some embodiments, the rotating member comprises:
the upper seat plate is provided with a third cambered surface; and
the spherical crown plate is arranged on the middle seat plate, is positioned between the middle seat plate and the upper seat plate, and is provided with a fourth cambered surface and the second cambered surface, the fourth cambered surface is in contact with the third cambered surface, and the fourth cambered surface can rotate at least relative to the third cambered surface;
the second limiting device is further used for limiting the fourth cambered surface to slide relative to the third cambered surface.
In some embodiments, the lower seat plate has grooves distributed along the longitudinal direction;
the support further comprises: and the force transmission guide rail is arranged on the middle seat plate and is positioned in the groove.
In some embodiments, the mount further comprises: the spherical friction pair and/or the plane friction pair are used for reducing friction loss; wherein, the spherical friction pair is at least positioned between the first cambered surface and the second cambered surface, and the plane friction pair is at least positioned between the lower seat plate and the middle seat plate.
The invention provides a longitudinal elastic constraint multifunctional seismic isolation and reduction support, wherein a rotating piece can adapt to the rotation requirement of a bridge through the rotation of a second cambered surface relative to a centering seat plate.
When the vibration intensity is smaller than the preset threshold value, the rotating part and the middle seat plate do not slide relatively, and then the rotating part and the middle seat plate can slide relatively to the lower seat plate as a whole, so that the sliding requirement of the bridge under the condition of smaller vibration intensity is met, and a certain damping effect is achieved. In the sliding process of the middle seat plate relative to the lower seat plate, the second limiting device limits the maximum slidable distance of the middle seat plate, and the limiting device can limit the sliding of the middle seat plate by utilizing the elastic limiting force provided by the elastic part, so that the longitudinal limiting rigidity of the support and the bridge is improved. Therefore, under the effect of second stop device and restraint device, the support not only can further improve the shock attenuation effect, can also make the bridge by striding to both sides uniform deformation under the temperature effect, with the flexible zero point locking of temperature of bridge at midspan position.
When receiving shock intensity and reaching preset threshold value, first stop device can be cut off, and the slip restraint between the piece that rotates and the well bedplate is released, rotates the relative bedplate that not only can rotate of centering, can also realize following the reciprocal slip of curved surface, further increases sliding rigidity and frictional resistance through first cambered surface and second cambered surface, and extension support natural vibration cycle dissipates seismic energy, further improves the shock attenuation and isolation effect again. Therefore, the support has the functions of sliding, rotating, load transferring and the like, and also has the functions of longitudinal adjustable limiting, longitudinal elastic constraint and the like. Can realize that the large-span bridge cancels and sets up flexible regulator, reduce maintenance work load, be favorable to practicing thrift construction cost and operation cost.
Drawings
FIG. 1 is one of the schematic structural views of a pedestal in some alternative embodiments of the invention;
FIG. 2 is one of the schematic structural illustrations of a pedestal in some alternative embodiments of the invention;
FIG. 3 is a schematic view of a portion of a second stop device;
FIG. 4 is a schematic view of the positioning pad of FIG. 3;
FIG. 5 shows a schematic view of the construction of the restraint device of FIG. 1;
fig. 6 is a third schematic structural view of a support in some alternative embodiments of the invention.
Reference numerals:
a rotating member 10; an upper seat plate 11; a third cambered surface 111; a spherical crown plate 12; a second arc surface 121; a fourth arc surface 122; a middle seat plate 20; a first arc surface 21; a main body 22; a stopper arm 23; a lower seat plate 30; a recess 31; a first limiting device 40; the second limiting device 50 of the guide non-metal sliding plate 41; a fixed plate 51; an adjustment shaft 52; a force transmission plate 53; a positioning washer 54; an opening 541; an adjusting nut 55; a stationary washer 56; an elastic member 60; an anchoring device 70; a spherical friction pair 80; a spherical metal sliding plate 81; a spherical non-metallic sled 82; a force transfer guide 90; a plane friction pair 100; a planar non-metallic sled 110; a planar metal slide 120; a guide slide 130; a restraint device 200; a first sliding sleeve 210; a second sliding bush 220; a stopper 211; a force-transmitting sleeve 212; a guide boss 213; a first stop boss 214-1; a second stop boss 214-2; a guide shaft 215; a stop bolt 216.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, belong to the scope of protection of the invention.
In an embodiment of the first aspect of the present invention, there is provided a multifunctional seismic mitigation and isolation bearing constrained by longitudinal elasticity, as shown in fig. 1, 2 and 6, the bearing includes: a lower seat plate 30, a middle seat plate 20, a rotation member 10, a first stopper 40, a second stopper 50, and a restriction device 200.
The middle seat plate 20 is connected with the lower seat plate 30 in a sliding mode and is provided with a first cambered surface 21; the rotating member 10 is located on the middle seat plate 20, and the upper part of the rotating member has a second arc surface 121, the second arc surface 121 is in contact with the first arc surface 21, and the second arc surface 121 can rotate at least relative to the first arc surface 21; the first limiting device 40 is mounted on the rotating part 10 and abuts against the middle seat plate 20 to limit the first arc surface 21 to slide relative to the second arc surface 121, and the connection strength between the first limiting device 40 and the rotating part 10 is smaller than a preset threshold value; the second limiting devices 50 are mounted on the lower seat plate 30 and respectively located at two sides of the middle seat plate 20 along the longitudinal direction of the bridge, so as to limit the sliding distance of the middle seat plate 20 along the longitudinal direction of the bridge; the restraining means 200 includes a connecting member connecting the lower seat plate 30 and the elastic member 60, and the elastic member 60 generates an elastic restraining force opposite to the moving direction of the middle seat plate 20 when the middle seat plate 20 slides in the longitudinal direction.
In practical applications, the rotating member 10 is connected to the beam body, and at least is used for bearing the load of the beam body and the vehicle on the beam body. The lower seat plate 30 is used to connect a bolster to transmit a force above the lower seat plate 30 downward to a pier through the bolster. The middle seat plate 20 is located between the rotation member 10 and the lower seat plate 30.
In some embodiments, the support further comprises an anchor 70, the anchor 70 connecting the lower seat plate 30 and the bolster.
Without limitation, the restraining devices 200 are distributed on both sides of the middle seat plate 20 in the transverse bridge direction. In order to keep the force uniform, the restraining devices 200 are symmetrically distributed on both sides of the middle seat plate 20. The transverse direction is vertical to the longitudinal direction.
As shown in fig. 1 and 3, the second position-limiting means 50 is spaced from the middle seat plate 20 by a distance which is the maximum distance that the middle seat plate 20 can slide in the longitudinal direction. When the bridge is deformed due to temperature change, the distance can absorb the deformation of the bridge, the bridge is guaranteed to be uniformly deformed from the midspan to two sides under the temperature effect, and the temperature telescopic zero point of the bridge is locked at the midspan position.
Sliding generally refers to sliding along a horizontal plane, and may be sliding along a longitudinal direction, and/or sliding along a transverse direction.
The first position-limiting device 40 may be a position-limiting ring sleeved outside the middle seat plate 20, and the position-limiting ring is fixed on the rotating member 10 and abuts against the middle seat plate 20. The first position-limiting means 40 limits the sliding of the rotary member 10 with respect to the center base plate 20, but does not limit the rotation of the rotary member 10 with respect to the center base plate 20. The structure of the first position limiting means 40 is not limited thereto.
In some embodiments, the elastic restraining force comprises a first elastic restraining force in a first longitudinal bridging direction and a second elastic restraining force in a second longitudinal bridging direction, wherein the first longitudinal bridging direction is opposite the second longitudinal bridging direction.
In practical applications, the middle seat plate 20 includes two sliding directions along the longitudinal direction, i.e. a first longitudinal direction and a second longitudinal direction. When the middle seat plate 20 slides in the first longitudinal bridging direction, the elastic member 60 is compressed by the force generated by the middle seat plate 20, and the elastic member 60 generates an elastic restraining force in the second longitudinal bridging direction. And vice versa. The constraint force along the two directions is not only beneficial to improving the anti-seismic effect of the support, but also can assist the bridge to generate more symmetrical deformation, and further improves the safety of the bridge.
In some embodiments, the first arc surface 21 is a concave spherical surface and the second arc surface 121 is a convex spherical surface; or, the first cambered surface 21 is a convex spherical surface, and the second cambered surface 121 is a concave spherical surface.
In some embodiments, when the vibration intensity reaches the preset threshold, the first limiting device is separated from the rotating member, and the first arc surface rotates and slides relative to the second arc surface.
Generally, whether the intensity of the received vibration reaches a preset threshold value or not, as long as the first arc surface 21 contacts with the second arc surface 121, the rotating member 10 can adapt to the rotation requirement of the bridge through the rotation of the second arc surface 121 relative to the middle seat plate 20.
When the earthquake intensity is smaller than the preset threshold value, the earthquake generated in the daily use process such as the braking force or the wind power of the vehicle, or when the earthquake intensity is small. Under the limiting effect of the first limiting device 40, the rotating part 10 and the middle seat plate 20 do not slide relatively, and then the rotating part 10 and the middle seat plate 20 can slide relatively to the lower seat plate 30 as a whole, so that the sliding requirement of the bridge under the condition of small vibration intensity is met, and a certain damping effect is achieved. During the sliding process of the middle seat plate 20 relative to the lower seat plate 30, the second limiting device 50 limits the maximum distance that the middle seat plate 20 can slide, and the restraining device 200 can limit the sliding of the middle seat plate 20 by using the elastic restraining force provided by the elastic member 60, thereby improving the longitudinal restraining rigidity of the support and the bridge. Therefore, under the action of the second limiting device 50 and the restraining device 200, the support can not only further improve the damping effect, but also enable the bridge to uniformly deform from midspan to both sides under the action of temperature, and lock the temperature telescopic zero point of the bridge at the midspan position.
When the intensity of the received vibration reaches a preset threshold value, for example, when the earthquake intensity is large. First stop device 40 can be cut off, and the slip restraint between rotation piece 10 and the well bedplate 20 is released, and rotation piece 10 not only can rotate relative well bedplate 20, can also realize following the reciprocal slip of curved surface, further increases sliding rigidity and frictional resistance through first cambered surface 21 and second cambered surface 121, prolongs the support natural vibration cycle and dissipates seismic energy, further improves the seismic mitigation and isolation effect again.
Therefore, the support provided by the embodiment of the invention has the functions of sliding, rotating, load transferring and the like, and also has the functions of longitudinal adjustable limiting, longitudinal elastic constraint and the like. Can realize that the large-span bridge cancels and sets up flexible regulator, reduce maintenance work load, be favorable to practicing thrift construction cost and operation cost. By the aid of the synergistic effect of the middle seat plate 20, the rotating part 10, the first limiting device, the second limiting device and the constraint device 200, multi-stage seismic isolation and reduction functions are achieved, seismic resistance of the bridge is improved, a telescopic regulator is not needed when the support provided by the embodiment of the invention is used in the bridge, the arrangement of a fixed pier is omitted, the problems that maintenance workload is large, smoothness of a line is poor and the like caused by the fact that steel rail telescopic regulators are arranged on a railway long-span bridge are solved, and construction cost and operation cost of the bridge are reduced.
In other alternative embodiments, the elastic member 60 includes at least one of: disc springs, ring springs or coil springs. But is not limited thereto.
In some other optional embodiments, the connection assembly comprises: a stopper 211, a guide shaft 215, a sliding bushing, and a stopper bushing.
As shown in fig. 5, a stopper 211 is mounted on the lower seat plate 30; two ends of the guide shaft 215 are respectively installed on the two stoppers 211 distributed along the longitudinal direction; the sliding shaft sleeve comprises a first sliding shaft sleeve 210 and a second sliding shaft sleeve 220 which are distributed at intervals along the longitudinal direction of the bridge, and the first sliding shaft sleeve 210 and the second sliding shaft sleeve 220 are both sleeved on the guide shaft 215; the first sliding sleeve 210 is connected to the middle seat plate 20 and the first end of the elastic member 60; the second sliding shaft sleeve 220 is connected to the second ends of the middle seat plate 20 and the elastic member 60, respectively; wherein the second end is opposite the first end; the stop bushing includes a first stop bushing 214-1 and a second stop bushing 214-2, and the first stop bushing 214-1 and the second stop bushing 214-2 are both mounted on the guide shaft 215, wherein the first stop bushing 214-1 limits the sliding distance of the first sliding bushing 210 in the longitudinal bridge direction, and the second stop bushing 214-2 limits the sliding distance of the second sliding bushing 220 in the longitudinal bridge direction.
The stopper 211 is used to connect the guide shaft 215 and the lower seat plate 30, and the guide shaft 215 is parallel to the longitudinal direction and has a guiding function for the sliding shaft sleeve.
When the middle seat plate 20 slides along the longitudinal direction, the sliding sleeve is driven to slide along the guide shaft 215.
Each sliding shaft sleeve corresponds to one stopping shaft sleeve. The stopping shaft sleeve has a stopping function and limits the maximum slidable distance of the sliding shaft sleeve.
Without limitation, the stop bushing is threadably coupled to the guide shaft 215.
It will be appreciated that in order to ensure that the first elastic restraining force of the elastic member 60 in the first longitudinal bridging direction and the second elastic restraining force in the second longitudinal bridging direction are equal, the maximum distance between each stop collar and the sliding collar is equal, i.e. the maximum distance each stop collar limits the sliding collar to be slidable is equal.
Fig. 5 schematically shows a structure of the restraining means 200 at one side of the middle seat plate 20.
The stopper 211 may be fixed to the lower seat plate 30 by a stopper bolt 216, without limitation.
In other optional embodiments, the sliding sleeve comprises: a force transmission shaft sleeve 212 and a guide shaft sleeve 213, wherein the force transmission shaft sleeve 212 is connected with the middle seat plate 20; the guide shaft sleeve 213 is connected with the force transmission shaft sleeve 212, and is respectively positioned at two sides of the stopping shaft sleeve with the force transmission shaft sleeve 212.
For the first sliding bush 210 and the first stopping bush 214-1, when the middle seat plate 20 slides to the first longitudinal bridge direction for the maximum distance, the guide bush 213 abuts against the stopping bush; when the middle seat plate 20 slides the maximum distance in the second longitudinal bridging direction, the force transmission sleeve 212 abuts against the stop sleeve. The stopping function of the second stopping boss 214-2 to the second sliding boss 220 is similar and will not be described again.
In practical application, the connecting assembly can also adopt other structures. For example, the connection assembly includes at least two connection blocks, the number of the elastic members 60 is at least two, the at least two elastic members 60 are located between the two connection blocks distributed along the longitudinal direction, each connection block is connected to a first end of the corresponding elastic member 60, and the middle seat plate 20 is connected to second ends of the two elastic members 60. In this structure, the middle seat plate 20 compresses the different elastic members 60 when sliding in different directions, and the elastic members 60 can provide elastic restraining forces in different directions. The structure of the connection assembly is not limited thereto.
In other optional embodiments, the middle seat plate 20 includes: a main body 22 and a stop arm 23, wherein the main body 22 has the first cambered surface 21 and is connected with the lower seat plate 30 in a sliding manner; the blocking arms 23 are connected to two sides of the main body 22 along a transverse direction, and the first sliding shaft sleeve 210 and the second sliding shaft sleeve 220 are respectively connected to two different blocking arms 23 on the same side; wherein the transverse direction is perpendicular to the longitudinal direction.
The stop arm 23 provides more space for the restraint device 200, reduces the interference of the restraint device 200 to the sliding of the main body 22 relative to the lower seat plate 30, and ensures the normal operation of the support.
In some other optional embodiments, the second position-limiting device 50 includes: a fixed plate 51, a force transmission plate 53, and an adjustment shaft 52; the fixed plate 51 is mounted on the lower seat plate 30; the force transmission plate 53 is positioned between the fixed plate 51 and the middle seat plate 20; the adjusting shaft 52 is inserted into the fixing plate 51 and the force transmission plate 53, and is used for adjusting the distance between the force transmission plate 53 and the middle seat plate 20.
As shown in fig. 1 and 3, the force transmission plate 53 is fixed to the adjustment shaft 52 and has two physically separable structures from the fixed plate 51. The distance between the force transmission plate 53 and the middle seat plate 20 is realized by sliding the adjusting shaft 52. When the sliding distance of the middle seat plate 20 along the longitudinal direction needs to be reduced, the adjusting shaft 52 is pushed towards the middle seat plate 20, the adjusting shaft 52 drives the force transmission plate 53 to move towards the middle seat plate 20, and the maximum sliding distance of the middle seat plate 20 along the longitudinal direction is reduced. And vice versa.
The force transfer plate 53 is a rectangular plate, without limitation, disposed between the lower seat plate 30 and the middle seat plate 20 for transferring a horizontal load.
In some embodiments, the adjustment shaft 52 is an adjustment bolt, and the second limiting device 50 further comprises: adjusting nut 55 and fixed ring, fixed washer 56 cup joints outside adjusting bolt, adjusting nut 55 and adjusting bolt threaded connection, and fixed washer 56 is located between adjusting nut 55 and fixed plate 51, utilizes adjusting nut 55 and fixed washer 56 to fix adjusting bolt on fixed plate 51.
In some other optional embodiments, the second position-limiting device 50 further includes: and the positioning gasket 54 is sleeved on the connecting shaft and is positioned between the fixed plate 51 and the force transmission plate 53.
As shown in fig. 1 and 5, the adjusting washer fills the gap between the fixing plate 51 and the force transmission plate 53, so that the strength of the second limiting device 50 can be enhanced, and the second limiting device has a certain buffering effect and can consume a certain amount of vibration energy.
In practical application, a plurality of positioning spacers 54 with different thicknesses are arranged between the force transmission plate 53 and the lower seat plate 30, and the distance between the force transmission plate 53 and the lower seat plate 30 can be adjusted by combining the positioning spacers 54 with different numbers and different thicknesses.
In some embodiments, as shown in fig. 4, the positioning pad 54 has an opening 541, and the positioning pad 54 is sleeved on the adjusting shaft 52 through the opening 541. The openings 541 facilitate the installation and removal of the spacer 54.
Without limitation, opening 541 is a kidney-shaped hole. But is not limited thereto.
Without limitation, the positioning pad 54 is a rectangular thin plate. But is not limited thereto.
In other alternative embodiments, the rotor 10 includes: an upper seat plate 11 and a spherical crown plate 12; the upper seat plate 11 is provided with a third cambered surface 111; the crown plate 12 is mounted on the middle seat plate 20 and located between the middle seat plate 20 and the upper seat plate 11, and has a fourth arc surface 122 and the second arc surface 121, the fourth arc surface 122 is in contact with the third arc surface 111, and the fourth arc surface 122 can rotate at least relative to the third arc surface 111; the second limiting device 50 is further configured to limit the fourth arc surface 122 to slide relative to the third arc surface 111.
In some embodiments, the third cambered surface 111 is a concave spherical surface, and the fourth cambered surface 122 is a convex spherical surface; alternatively, the third cambered surface 111 is a convex spherical surface, and the fourth cambered surface 122 is a concave spherical surface.
Compared with the rotating part 10 formed by one part, the rotating part 10 formed by the upper seat plate 11 and the spherical crown plate 12 shown in fig. 1 and fig. 2 is adopted, and the upper seat plate 11 and the spherical crown plate 12 can also relatively rotate or relatively rotate and slide, so that the movability of the support is further increased, the vibration energy is further consumed, and the shock resistance effect of the support and the bridge expansion deformation caused by temperature change resistance are further improved.
In other alternative embodiments, the lower seat plate 30 has grooves 31 distributed along the longitudinal direction; the support further comprises: a force transmission guide rail mounted on the centre seat plate 20 and located in the recess 31.
The lower seat plate 30 slides in the groove 31 through the force transmission guide rail, the groove wall of the groove 31 can be used for further limiting the sliding of the lower seat plate 30, the lower seat plate 30 is limited to be separated from the groove 31, and the safety of the support is further improved.
The force transfer rail may be connected to the lower plate 30 by bolts, without limitation.
The grooves 31 are distributed along the longitudinal direction and are disposed substantially at the center of the lower seat plate 30.
In some embodiments, as shown in fig. 2, the mount further comprises: guide slides 130 are located in the grooves 31 on either side of the force transfer guide 90.
In some other optional embodiments, the support further comprises: a spherical friction pair 80 and/or a planar friction pair 100 for reducing friction loss; wherein the spherical friction pair 80 is at least located between the first cambered surface 21 and the second cambered surface 121, and the plane friction pair 100 is at least located between the lower seat plate 30 and the middle seat plate 20.
The spherical friction pair 80 and the plane friction pair 100 are used for reducing the friction between interfaces and ensuring the mobility of the support.
In some embodiments, the spherical friction pair 80 comprises a spherical non-metallic sled 82 and a spherical metallic sled 81, wherein the spherical metallic sled 81 comprises, but is not limited to, a spherical stainless steel picture.
In some embodiments, there is a spherical friction pair 80 between the first cambered surface 21 and the second cambered surface 121; wherein, the spherical non-metal sliding plate 82 is installed on one of the first cambered surface 21 and the second cambered surface 121, and the spherical metal sliding plate 81 is installed on the other one of the first cambered surface 21 and the second cambered surface 121.
In some embodiments, there is a spherical friction pair 80 between the third cambered surface 111 and the fourth cambered surface 122; wherein, the spherical non-metal sliding plate 82 is installed on one of the third cambered surface 111 and the fourth cambered surface 122, and the spherical metal sliding plate 81 is installed on the other one of the third cambered surface 111 and the fourth cambered surface 122.
In some embodiments, the planar friction pair 100 includes a planar non-metal sled 110 and a planar metal sled 120. The planar metal sled 120 includes, but is not limited to, a planar stainless steel sled.
In some embodiments, there is a planar friction pair 100 between the lower seat plate 30 and the middle seat plate 20; wherein the planar non-metal sliding plate 110 is mounted on one of the lower seat plate 30 and the middle seat plate 20, and the planar metal sliding plate 120 is mounted on the other of the lower seat plate 30 and the middle seat plate 20.
In practical applications, the plane friction pair 100 between the lower seat plate 30 and the middle seat plate 20 is located outside the groove 31.
In some embodiments, the guide non-metal sliding plates 41 are disposed on four sides of the middle seat plate 20, and the guide non-metal sliding plates 41 are located between the middle seat plate 20 and the first position limiting device 40 for reducing friction loss between the middle seat plate 20 and the first position limiting device 40.
In a specific example, the support of the example is a longitudinal elastic constraint multifunctional seismic isolation and reduction support. As shown in fig. 1 to 5, the support comprises an upper seat plate 11, a spherical non-metal sliding plate 82, a spherical stainless steel sliding plate, a spherical crown plate 12, a middle seat plate 20, a first limiting device 40, a second limiting device 50, a lower seat plate 30, a force transmission guide rail, a restraining device 200, a planar stainless steel sliding plate, a planar non-metal sliding plate 110, a guide sliding plate, an anchoring device 70 and the like.
The second limiting device 50 is arranged on two sides of the longitudinal bridge direction of the support, and the second limiting device 50 mainly comprises a force transmission plate 53, a positioning gasket 54, a fixing plate 51, an adjusting bolt, a fixing washer 56, an adjusting nut 55 and the like. The force transmission plate 53 and a plurality of positioning gaskets 54 with different thicknesses are arranged between the middle seat plate 20 and the lower seat plate 30, and a gap is arranged between the force transmission plate 53 and the lower seat plate 30. By combining the positioning gaskets 54 with different quantities and thicknesses, the size of the gap between the force transmission plate 53 and the lower seat plate 30 can be adjusted to meet the requirements of slippage and limiting of the bridge under different temperature shrinkage creep. The force transmission plate 53 and the positioning gasket 54 are connected with the lower seat plate 30 and the fixing plate 51 through the adjusting bolt and the adjusting nut 55, and the positioning gasket 54 is provided with a waist-shaped hole with an opening 541, so that the assembly and disassembly are convenient.
When the longitudinal bridge gap of the support needs to be adjusted, firstly determining the gap adjustment amount; secondly, loosening the positioning adjusting nut 55, and detaching or installing the combined positioning gasket 54 with the thickness the same as the gap adjustment amount; finally, the adjustment of the amount of clearance can be completed by tightening the adjusting nut 55. Through adjustment in the clearance of support both sides, can lock the flexible zero point of temperature of bridge in the position of striding.
The restraint device 200 is arranged on two sides of the transverse bridge of the support, the restraint device 200 mainly comprises a force transmission shaft sleeve 212, a stop shaft sleeve, a guide shaft sleeve 213, an elastic piece 60, a guide shaft 215, a stop block 211 and a limit bolt 216, and the restraint device 200 is fixed on the lower seat plate 30 by the limit bolt 216. The part of the restraint device 200 from the force transmitting sleeves 212 on both sides to the middle position is clamped between the two wing arms 23 of the middle seat plate 20. The force transmission sleeve 212 and the guide sleeve 213 can slide along the guide shaft 215, and the stop sleeve is in threaded connection with the guide shaft 215. When the support moves to one side along the longitudinal direction, the blocking arm 23 of the middle seat plate 20 drives the force transmission shaft sleeve 212 and the guide shaft sleeve 213 to compress the elastic element 60 to generate an elastic constraint force, and the elastic element 60 extrudes the guide shaft sleeve 213 on the other side (i.e. the guide shaft sleeve 213 in the first sliding shaft sleeve 210) and transmits the force to the structures such as the blocking shaft sleeve, the guide shaft 215, the stop block 211, the limit bolt 216, the lower seat plate 30 and the like in sequence. When the support moves along the longitudinal direction of the bridge, the elastic constraint force generated by the elastic part 60 provides a certain rigidity constraint effect for the bridge, so that the bridge can be uniformly contracted and deformed from the midspan to two sides under the temperature effect.
The upper portion of support is for subtracting shock insulation structure, mainly includes upper seat board 11, two non-metallic slide plates 82 of sphere, two sphere stainless steel slide plates, spherical crown plate 12, well bedplate 20 and first stop device 40. The upper spherical non-metal sliding plate 82 and the upper spherical stainless steel sliding plate form an upper spherical friction pair 80, and the lower spherical non-metal sliding plate 82 and the lower spherical stainless steel sliding plate form a lower spherical friction pair 80. The first limiting device 40 is fixed on the upper seat plate 11 and can limit the sliding of the two spherical friction pairs 80 in a non-earthquake state or a slight earthquake state.
During normal operation, due to the limiting effect of the first limiting device 40, the two spherical friction pairs 80 on the upper portion of the support do not slide (i.e., the first cambered surface 21 and the second cambered surface 121 do not slide), the plane friction pair 100 (i.e., the plane friction pair 100 between the middle seat plate 20 and the lower seat plate 30) composed of the plane stainless steel sliding plate and the plane nonmetal sliding plate 110 can meet the daily sliding requirement, and the two spherical friction pairs 80 can meet the rotation requirement of the bridge. When the support normally slides, the restraint device 200 plays a role in providing a certain rigidity restraint effect for the bridge, so that the bridge is uniformly contracted and deformed from the midspan to two sides under the temperature effect.
When an earthquake occurs, if earthquake force is small, the longitudinal elastic restraint device 200 can play a certain role in seismic isolation and reduction, if earthquake force is large, the limiting device is cut off, the two spherical friction pairs 80 horizontally slide back and forth, and the sliding rigidity and the friction resistance provided by the sliding surface are used for prolonging the self-vibration period of the structure and dissipating earthquake energy to achieve the seismic isolation and reduction effect.
The second limiting device 50, the restraining device 200 and the seismic isolation and reduction structure are integrated, so that the device is high in functionality, compact in structure and good in support economy. The long-span bridge with the coupling length within 400m can be realized without arranging a steel rail telescopic regulator, the multiple piers are stressed in a synergistic manner, and the structural deformation is symmetrical. The method can be popularized and applied to continuous system bridges such as concrete continuous beams, partial cable-stayed bridges, continuous beam arch bridges and the like. The system can further enhance the driving smoothness of the seamless line on the bridge and reduce the construction, maintenance and repair cost.
Through increasing restraint device 200, second stop device 50 and subtracting isolation structure, can cancel the setting of bridge anchor block, the full-bridge all adopts the movable support. The bridge is particularly suitable for the large-span bridge in the high-intensity seismic region of the high-speed railway.
In addition, the technical scheme of the embodiment of the invention can solve the problem that the curved railway long-span bridge or the large longitudinal slope long-span bridge cannot be provided with the rail temperature regulator, is favorable for reducing the line selection difficulty of the high-speed railway and also reduces the construction cost of expropriation and removal. The steel rail telescopic regulator can be avoided, and the construction, maintenance and maintenance costs of the steel rail telescopic regulator are avoided. The high-speed running quality of the train can be improved. The seismic isolation and reduction device has good seismic performance, and solves the seismic isolation and reduction problem of bridges in high-intensity seismic areas.
Features disclosed in several product embodiments provided by embodiments of the present invention may be combined arbitrarily without conflict to obtain a new product embodiment.
Other structures and operations of the supports and bridges according to embodiments of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. The utility model provides a multi-functional isolation bearing that subtracts of longitudinal elastic constraint which characterized in that, the support includes:
a lower seat plate;
the middle seat plate is connected with the lower seat plate in a sliding mode, and the upper part of the middle seat plate is provided with a first cambered surface;
the rotating part is positioned on the middle seat plate and is provided with a second cambered surface, the second cambered surface is in contact with the first cambered surface, and the second cambered surface can rotate at least relative to the first cambered surface;
the first limiting device is arranged on the rotating piece and is abutted against the middle base plate to limit the first cambered surface to slide relative to the second cambered surface, and the connection strength of the first limiting device and the rotating piece is smaller than a preset threshold value;
the second limiting devices are arranged on the lower seat plate and are respectively positioned on two sides of the middle seat plate along the longitudinal bridge direction to limit the sliding distance of the middle seat plate along the longitudinal bridge direction; and the restraint device comprises a connecting assembly and an elastic piece, the connecting assembly is connected with the lower seat plate and the elastic piece, and the elastic piece generates elastic restraint force opposite to the moving direction of the middle seat plate when the middle seat plate slides along the longitudinal bridge direction.
2. The bracket according to claim 1, wherein said connection assembly comprises:
the stop block is arranged on the lower seat plate;
two ends of the guide shaft are respectively arranged on the two stop blocks distributed along the longitudinal bridge direction;
the sliding shaft sleeves comprise first sliding shaft sleeves and second sliding shaft sleeves which are distributed at intervals along the longitudinal bridge direction, and the first sliding shaft sleeves and the second sliding shaft sleeves are sleeved on the guide shaft; the first sliding shaft sleeve is respectively connected with the middle seat plate and the first end of the elastic piece; the second sliding shaft sleeve is respectively connected with the middle seat plate and the second end of the elastic piece; wherein the second end is opposite the first end; and
the stopping shaft sleeve comprises a first stopping shaft sleeve and a second stopping shaft sleeve, the first stopping shaft sleeve and the second stopping shaft sleeve are both installed on the guide shaft, wherein the first stopping shaft sleeve limits the sliding distance of the first sliding shaft sleeve along the longitudinal bridge direction, and the second stopping shaft sleeve limits the sliding distance of the second sliding shaft sleeve along the longitudinal bridge direction.
3. A mount, as set forth in claim 2, wherein said sliding sleeve comprises:
the force transmission shaft sleeve is connected with the middle seat plate; and
and the guide shaft sleeve is connected with the force transmission shaft sleeve and is respectively positioned at two sides of the stopping shaft sleeve.
4. The bracket as set forth in claim 2, wherein said middle seat plate comprises:
the main body is provided with the first cambered surface and is connected with the lower seat plate in a sliding manner;
the first sliding shaft sleeve and the second sliding shaft sleeve are respectively connected with two different retaining arms on the same side; wherein the transverse direction is perpendicular to the longitudinal direction.
5. A mount, according to any one of claims 1 to 4, wherein said resilient member comprises at least one of: disc springs, ring springs or coil springs.
6. A mount, as claimed in claim 1, wherein said second stop means comprises:
the fixing plate is arranged on the lower seat plate;
the force transmission plate is positioned between the fixing plate and the middle seat plate; and
the adjusting shaft penetrates through the fixing plate and the force transmission plate and is used for adjusting the distance between the force transmission plate and the middle seat plate.
7. The bracket according to claim 6, wherein said second limiting means further comprises:
and the positioning gasket is sleeved on the connecting shaft and is positioned between the fixed plate and the force transmission plate.
8. The bracket according to claim 1, wherein said rotating member comprises:
the upper seat plate is provided with a third cambered surface; and
the spherical crown plate is arranged on the middle seat plate, is positioned between the middle seat plate and the upper seat plate, and is provided with a fourth cambered surface and the second cambered surface, the fourth cambered surface is in contact with the third cambered surface, and the fourth cambered surface can rotate at least relative to the third cambered surface;
the second limiting device is further used for limiting the fourth cambered surface to slide relative to the third cambered surface.
9. The bracket according to claim 1, wherein the lower seat plate is provided with grooves distributed along the longitudinal direction;
the support further comprises: and the force transmission guide rail is arranged on the middle seat plate and is positioned in the groove.
10. The bracket according to claim 1, further comprising: the spherical friction pair and/or the plane friction pair are used for reducing friction loss; wherein, the spherical friction pair is at least positioned between the first cambered surface and the second cambered surface, and the plane friction pair is at least positioned between the lower seat plate and the middle seat plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111450.4A CN113832841A (en) | 2021-09-18 | 2021-09-18 | Longitudinal elastic constraint multifunctional seismic reduction and isolation support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111450.4A CN113832841A (en) | 2021-09-18 | 2021-09-18 | Longitudinal elastic constraint multifunctional seismic reduction and isolation support |
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| CN113832841A true CN113832841A (en) | 2021-12-24 |
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|---|---|---|---|
| CN202111111450.4A Pending CN113832841A (en) | 2021-09-18 | 2021-09-18 | Longitudinal elastic constraint multifunctional seismic reduction and isolation support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114808673A (en) * | 2022-03-31 | 2022-07-29 | 中铁第四勘察设计院集团有限公司 | Annular elastic shock absorption and isolation support |
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