CN113818330A - Staggered embedded self-reset energy consumption buffering limiting device - Google Patents
Staggered embedded self-reset energy consumption buffering limiting device Download PDFInfo
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- CN113818330A CN113818330A CN202111192835.8A CN202111192835A CN113818330A CN 113818330 A CN113818330 A CN 113818330A CN 202111192835 A CN202111192835 A CN 202111192835A CN 113818330 A CN113818330 A CN 113818330A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/041—Elastomeric bearings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
Abstract
The invention relates to a staggered embedded self-resetting energy consumption buffering and limiting device; the screw rod clamping device comprises a first perforated bolt, a second perforated bolt, a pressure element and a fastener, wherein the sections of the two screw rods are mutually staggered, the pressure element is sleeved on the screw rod of the perforated bolt, and the fastener is arranged at the tail part of the screw rod of the perforated bolt. The reserved slideways which are completely communicated and are mutually staggered are processed in the longitudinal direction of the first perforated bolt and the second perforated bolt, and the two screw rods can be embedded into each other along the axial direction and can generate relative displacement through the reserved slideways. The compression element is nested on the screw rods of the first perforated bolt and the second perforated bolt and between the heads of the first perforated bolt and the second perforated bolt. The fastener can drive the two perforated bolts to axially move in opposite directions. Compared with the prior art, the invention has the advantages of clear and simple structure, small space installation, strong bearing capacity and energy consumption capability, strong deformation capability, self-resetting function and self-locking function, and multiple anti-seismic defense lines.
Description
Technical Field
The invention belongs to the technical field of civil engineering earthquake resistance and shock absorption, and relates to a staggered embedded self-resetting energy consumption buffering limiting device, an earthquake isolating support, an external stay cable damper and a bridge limiting device.
Background
When the structure is subjected to the action of earthquake load, components with different rigidity often generate larger relative displacement, so that the phenomena of component falling or component collision and the like are caused, the permanent damage of the structural structure which is difficult to repair or even cannot be repaired is caused, and the time, the material and the labor cost of earthquake relief are increased. For example, in the case of bridge engineering, if effective displacement constraint and a certain self-resetting mechanism are lacked, under the input of strong earthquake energy, the upper bridge deck is often subjected to excessive displacement to cause serious damage and even collapse.
At present, in the field of passive earthquake resistance, components and devices such as dampers, seismic isolation and reduction supports and the like are considered as effective means for reducing earthquake damage of buildings and bridge structures, and sometimes the components and the devices can be applied to practical engineering together with steel cables or shape memory alloy cables, so that the limiting function is realized. The components and devices still have some defects, such as large volume, lack of energy consumption capability, complex construction principle, difficult repair after earthquake, and the like.
Disclosure of Invention
The purpose of the invention is: aiming at the existing problems, the staggered embedded self-resetting energy consumption buffering limiting device can be mounted in a small space, has strong bearing capacity and energy consumption capacity and strong deformability, has a self-resetting function and a self-locking function, and can realize a plurality of anti-seismic defense lines.
The purpose of the invention can be realized by the following technical scheme:
on one hand, the invention provides a staggered embedded self-resetting energy consumption buffering and limiting device, which comprises:
the screw rod clamping device comprises two perforated bolts with cross sections of the screw rods staggered with each other, a pressure element sleeved on the screw rods of the perforated bolts, and a fastener arranged at the tail parts of the screw rods of the perforated bolts. The trompil bolt includes first trompil bolt and second trompil bolt, wherein, processing has the reservation slide that link up completely and stagger each other in the longitudinal direction of first trompil bolt and second trompil bolt, and through reserving the slide, the screw rod of first trompil bolt and the screw rod of second trompil bolt can be followed the axial and embedded each other and can produce relative displacement. The compression element is provided with a circular through hole in the center of the cross section, the diameter of the circular through hole is the same as that of the screw rod of the hole bolt, the circular through hole is nested on the screw rods of the first hole bolt and the second hole bolt and between the heads of the first hole bolt and the second hole bolt, the compression element can be in the form of any compressible spring such as a ring spring, a spiral spring or a disc spring, and the module is a product in the prior art. The fastener can drive the two perforated bolts to axially move in opposite directions, so that the heads of the two perforated bolts gradually approach and press the compression element.
Further, the first perforated bolt and the second perforated bolt are a cylindrical head, an unthreaded screw and a threaded screw in sequence from the head to the screw. The first perforated bolt and the second perforated bolt are different only in screw section.
Furthermore, the cross section of the screw of the first tapping bolt is provided with four fan rings which are symmetrically arranged, are not contacted with each other and are equal in size, the central angles of the fan rings are all 45 degrees, and the centers of the large fan and the small fan of the four fan rings are overlapped; the screw section of the second perforated bolt is formed by modifying the hollow circular sections at the inner sides of the four fan rings into a solid circular section on the basis of the screw section of the first perforated bolt. The cross section of the screw of the perforated bolt extends to the full length of the bolt.
Further, the threaded rods of the first and second hole-opening bolts may be staggered to form a complete circular cross section, so that the first and second hole-opening bolts may be axially embedded in each other and may be relatively displaced, and the threaded rods of the first and second hole-opening bolts are located outside the overlapping portion of the first and second hole-opening bolts.
Furthermore, the pressure element is provided with a circular through hole in the center of the cross section, and the diameter of the circular through hole is the same as that of the screw rod of the hole bolt, so that the pressure element can be embedded in the overlapped part of the screw rods of the first hole bolt and the second hole bolt and can freely move along the axial direction of the first hole bolt and the second hole bolt. Meanwhile, the compression element is located between the heads of the first and second hole bolts. The compression element may be in the form of any compressible spring such as a ring spring, a coil spring or a disc spring.
Furthermore, the fastener is a cylindrical sleeve, and the sleeve is connected with the threaded screw of the perforated bolt through the inner side threads of the sleeve. The end of the sleeve is provided with a semicircular annular connecting piece through welding or other connecting modes, so that the fastener is convenient to be connected with other members.
Further, the deformation mechanism of the invention is as follows: firstly, in an original state, based on the cross sections of the staggered screws of the first perforated bolt and the second perforated bolt, the first perforated bolt and the second perforated bolt are embedded into each other in opposite directions, the threaded screws of the first perforated bolt and the second perforated bolt are positioned outside the overlapping length of the first perforated bolt and the second perforated bolt, namely the threaded screws of the first perforated bolt and the second perforated bolt are positioned outside the head of the first perforated bolt and the head of the second perforated bolt, meanwhile, the compression element is nested on the screws of the first perforated bolt and the second perforated bolt and between the heads, and the fastener is connected with the threaded screws of the first perforated bolt and the second perforated bolt through threads. And secondly, the fastening pieces at the two ends of the device are stretched outwards, the first hole-forming bolt and the second hole-forming bolt are simultaneously stretched and move towards each other, and the heads of the first hole-forming bolt and the second hole-forming bolt gradually approach and abut against a pressed element positioned between the heads of the first hole-forming bolt and the second hole-forming bolt. Then, continuing to pull the fastener, the heads of the first and second hole bolts press the compression element at both ends simultaneously, and the device is stressed and consumes energy. Finally, the compression element reaches the limit compression state, and the device is in a tensioning state, so that the self-locking and limiting functions are realized.
Compared with the traditional device, the device has the following advantages: the small-space installation can be realized, and considerable deformability can be realized in a limited space; the bearing capacity is strong, and the energy consumption capacity of the common steel cable is also achieved; the self-resetting capability is realized, and the repair and replacement after the earthquake are reduced; the device has a self-locking function, can be in a self-locking state after being tensioned, and can realize a plurality of anti-seismic defensive lines. Therefore, the device has good application prospect in the field of seismic isolation and reduction.
On the other hand, the invention also provides a vibration isolation support which comprises the staggered embedded self-resetting energy dissipation buffering limiting device, a support body, a connecting piece, a bolt and a nut in any one of the above embodiments or any combination thereof. The support body can be any type of support, such as a rubber support, a lead support, a sliding support and the like, and can be used as a bridge anti-seismic support and the like. The connecting piece be semicircle annular rings, both ends processing has circular through-hole, the relative surface of upper bracket board and bottom suspension bedplate also processes simultaneously has circular through-hole, the connecting piece is connected with the circular through-hole of upper bracket board and bottom suspension bedplate through bolt, nut. The staggered embedded self-resetting energy dissipation buffering limiting device is connected with the upper support plate and the lower support plate through connecting pieces.
In another aspect, the present invention further provides an external damper for a stay cable, which includes the staggered embedded self-resetting energy dissipation buffering and limiting device, the stay cable, the cable hoop, the supporting pillar, the connecting member, the bolt and the nut in any one of the above embodiments or any combination thereof. The hoop is fixedly connected by an upper semicircular high-strength steel plate and a lower semicircular high-strength steel plate through bolts, and is sleeved on the outer surface of the stay cable. The support columns are steel columns fixedly arranged on the bridge floor through welding or bolts. The connecting piece be semicircle annular rings, both ends processing have circular through-hole, the cuff outside also is provided with circular through-hole simultaneously with the support column top, the connecting piece is connected with the cuff outside and the circular through-hole on support column top through bolt, nut. The staggered embedded self-resetting energy dissipation buffering limiting device is connected with the hoop and the supporting columns through the connecting piece.
In another aspect, the invention further provides a bridge limiting device, which includes the staggered embedded self-resetting energy-consuming buffering limiting device, a main beam, a bridge support, a pier, a fixed anchor plate, a connecting piece, a bolt and a nut in any one of the above embodiments or any combination thereof. The main beam is arranged on the bridge pier through a bridge support, and the fixed anchor plate is arranged on the lower surface of the main beam and the side wall of the bridge pier through bolts. The connecting piece be semicircle annular rings, both ends processing have circular through-hole, also processing has circular through-hole on the fixed anchor board simultaneously, the connecting piece is connected with the circular through-hole of fixed anchor board through bolt, nut. The staggered embedded self-resetting energy-consumption buffering limiting device is connected with the lower surface of the main beam and the side wall of the pier through a connecting piece.
Compared with the prior art, the invention has the following characteristics:
(1) the invention has the advantages of clear stress mechanism and clear and simple structure.
(2) By adjusting the number and the size of the compression elements and the length of the screw rod of the perforated bolt, the tensile bearing capacity and the deformation capacity of the staggered embedded self-resetting energy-dissipation buffering limiting device can be flexibly designed.
(3) The small-space installation can be realized, and considerable deformability can be realized in a limited space.
(4) The bearing capacity is stronger, possesses the power consumption ability that conventional buffering stop device (for example, the shock attenuation isolation bearing of assembly steel cable) lacked simultaneously.
(5) Having a certain self-resetting capability (e.g. when the compression element is in the form of a ring spring) reduces post-shock repair and replacement.
(6) The device has a self-locking function, can be in a self-locking state after being tensioned, and can realize a plurality of anti-seismic defensive lines.
(7) Each component in the staggered embedded self-resetting energy-consumption buffering limiting device can realize factory prefabrication and normalized assembly, has higher assembly degree and higher popularization and application values.
Drawings
Fig. 1 is a schematic view of a staggered embedded self-resetting energy-consuming buffer limiting device, wherein (a) shows a structural diagram; (b) a schematic cross-sectional view is shown.
FIG. 2 is a three-dimensional schematic view of a first vented bolt.
FIG. 3 is a top view of the first hole bolt.
FIG. 4 is a three-dimensional view of a second vented bolt.
FIG. 5 is a top view of the second hole bolt.
FIG. 6 is a schematic view of a staggered inset of a first lag bolt and a second lag bolt, wherein (a) represents a three-dimensional schematic view; (b) a schematic front view is shown.
FIG. 7 is a schematic diagram of an exemplary compression element in the form of an annular spring, wherein (a) represents an unstressed condition; (b) indicating an extreme compression state.
Fig. 8 is a schematic view of the construction of an exemplary compression element in the form of a coil spring, wherein (a) indicates an unstressed state; (b) indicating an extreme compression state.
FIG. 9 is a schematic diagram of an exemplary compression element in the form of a disc spring, wherein (a) represents an unstressed condition; (b) indicating an extreme compression state.
FIG. 10 is a cross-sectional schematic view of a fastener.
FIG. 11 is a top schematic view of a fastener.
Fig. 12 is a deformation mechanism diagram of the staggered embedded self-resetting energy-consuming buffering and limiting device.
Fig. 13 is a top view of a sliding seismic isolation bearing employing a staggered embedded self-resetting energy-dissipating buffering limiting device.
Fig. 14 is a schematic cross-sectional view of section a-a in fig. 13.
Fig. 15 is a schematic cross-sectional view of section B-B of fig. 13.
FIG. 16 is a top view of the seismic isolation mount of FIG. 13 undergoing a sliding deformation under a horizontal force.
Fig. 17 is a schematic structural view of the seismic isolation mount in fig. 16.
Fig. 18 is a schematic structural view of an external stay cable damper employing a staggered embedded self-resetting energy dissipation buffering limiting device.
Fig. 19 is a sectional view of the stay external damper of fig. 18 taken along a-a section.
Fig. 20 is a schematic elevation view of a bridge stop device employing a staggered embedded self-resetting energy-consuming buffering stop device.
Fig. 21 is a schematic structural view of the bridge limiting device in fig. 20.
The notation in the figure is:
1-a first open-hole bolt, 2-a second open-hole bolt, 3-a compression element, 4-a fastener;
5-interleaving embedded self-reset energy consumption buffering and limiting devices;
6-upper support plate, 7-stainless steel plate, 8-polytetrafluoroethylene plate, 9-steel plate, 10-rubber layer, 11-lower support plate, 12-connecting piece, 13-bolt and 14-nut;
15-stay cable, 16-hoop and 17-support column;
18-main beam, 19-bridge support, 20-pier and 21-fixed anchor plate.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
In the following embodiments or examples, functional components or structures that are not specifically described are all conventional components or structures in the art for achieving the corresponding functions.
On one hand, the invention provides a staggered embedded self-resetting energy dissipation buffering limiting device, which has a structure shown in fig. 1 and comprises a first perforated bolt 1 and a second perforated bolt 2 with mutually staggered screw sections, a compression element 3 sleeved on a screw of the perforated bolt, and a fastener 4 installed at the tail part of the screw of the perforated bolt. Wherein, processing has the reservation slide that link up completely and crisscross each other in the longitudinal direction of first trompil bolt 1 and second trompil bolt 2, and through reserving the slide, the screw rod of first trompil bolt 1 and the screw rod of second trompil bolt 2 can be along the axial embedded each other and can produce relative displacement. The compression element 3 is provided with a circular through hole in the center of the cross section, the diameter of the circular through hole is the same as that of the screw rod of the hole bolt, the circular through hole is nested on the screw rods of the first hole bolt 1 and the second hole bolt 2 and between the heads of the screw rods, and the circular through hole can be in the form of any compressible spring such as a ring spring, a spiral spring or a disc spring. The fastener 4 can bring the first and second hole bolts 1 and 2 to move axially in opposite directions, so that the heads of the two approach and press the compression element 3.
In a preferred embodiment of the present invention, as shown in fig. 2 to 6, the first and second hole bolts 1 and 2 are a cylindrical head, an unthreaded screw, and a threaded screw in the order from the head to the screw. The first and second hole bolts 1 and 2 differ only in the screw section. The length of the unthreaded screw rods of the first perforated bolt 1 and the second perforated bolt 2 is greater than the sum of the length of the compression element 3 and the length of the cylindrical head of the perforated bolt, so that the staggered embedded self-resetting energy dissipation buffering limiting device has certain free stretching length before being stressed.
In a further embodiment, referring to fig. 3, the screw section of the first hole-opening bolt 1 is formed by four symmetrically placed fan rings which are not in contact with each other and have equal size, the central angles of the fan rings are all 45 °, and the centers of the large fan and the small fan of the four fan rings are all overlapped; referring to fig. 5, the screw section of the second hole-forming bolt 2 is formed by modifying the hollow circular sections of the inner sides of the four fan rings into solid circular sections on the basis of the screw section of the first hole-forming bolt 1. The cross sections of the screws of the first hole bolt 1 and the second hole bolt 2 extend to the full length of the bolts, so that the first hole bolt 1 and the second hole bolt 2 can be embedded into each other.
In a further embodiment, as shown in fig. 6, by axially rotating the hole bolts, the threaded rods of the first hole bolt 1 and the second hole bolt 2 are staggered to form a complete circular cross section, so that the first hole bolt 1 and the second hole bolt 2 are axially embedded in each other and can be relatively displaced, thereby compressing the compression element 3 between the heads of the first hole bolt 1 and the second hole bolt 2. The threaded screws of the first perforated bolt 1 and the second perforated bolt 2 are positioned outside the overlapped part of the first perforated bolt 1 and the second perforated bolt 2, so that the perforated bolts and the fastening pieces 4 are connected through threads conveniently.
In a further embodiment, the first and second hole bolts 1 and 2 are made of high-strength steel, so as to ensure that they always maintain elasticity.
In a preferred embodiment of the present invention, as shown in fig. 7 to 9, the pressing member 3 is formed with a circular through hole in the center of the cross section, and has the same diameter as the screw of the open-hole bolt, so that it can be fitted in the screw overlapping portion of the first open-hole bolt 1 and the second open-hole bolt 2 and can freely move in the axial direction thereof. Meanwhile, the pressing member 3 is located between the heads of the first and second hole bolts 1 and 2, and thus can be compressed by the heads of the first and second hole bolts 1 and 2. The compression element 3 may be in the form of any compressible spring such as a ring spring, a coil spring or a disc spring.
When the compression element 3 in the form of an annular spring is used, as shown in fig. 7, the compression element 3 includes a plurality of inner rings which are arranged at intervals on the screw rod of the perforated bolt and can move along the axial direction of the perforated bolt, and an outer ring which is arranged on two adjacent inner rings and is used for abutting against and pressing the outer side surface of the outer ring. The contact slope surfaces between the inner ring and the outer ring are matched with each other. The inner ring is made of high-strength steel, and the outer ring is made of shape memory alloy or high-strength steel.
When the pressing member 3 in the form of a coil spring is used, as shown in fig. 8, the pressing member 3 includes a coil spring and a steel plate at both end pressing sides of the coil spring. The spiral spring is connected with the steel plate through welding. The steel plate is circular, and the inner diameter of the steel plate is the same as the diameter of the screw of the perforated bolt, so that the steel plate can be embedded in the overlapped part of the screws of the first perforated bolt 1 and the second perforated bolt 2 and can freely move along the axial direction of the steel plate.
When the pressing member 3 in the form of a disc spring is used, as shown in fig. 9, the pressing member 3 includes a conical disc spring and a steel plate on both pressing sides of the conical disc spring. The steel plate is circular, and the inner diameter of the steel plate is the same as the diameter of the screw of the perforated bolt, so that the steel plate can be embedded in the overlapped part of the screws of the first perforated bolt 1 and the second perforated bolt 2 and can freely move along the axial direction of the steel plate.
In a preferred embodiment of the invention, as shown in fig. 10-11, the fastening element 4 is a cylindrical sleeve which is connected by its inner thread to the threaded shank of the first and second apertured bolts 1, 2. The end of the sleeve is provided with a semicircular annular connecting piece through welding or other connecting modes, so that the fastener is convenient to be connected with other members.
In a preferred embodiment of the invention, a washer can be arranged between the head of the hole bolt and the fastening element 4 and between the head of the hole bolt and the pressure element 3.
In a preferred embodiment of the present invention, the deformation mechanism of the staggered in-line self-resetting energy-consuming buffer limiting device 5 is as follows: referring to fig. 12, in an original state, based on the cross-sectional screw sections of the first hole-forming bolt 1 and the second hole-forming bolt 2, the first hole-forming bolt 1 and the second hole-forming bolt 2 are inserted into each other in opposite directions, the threaded screws of the first hole-forming bolt 1 and the second hole-forming bolt 2 are located outside the overlapping length of the first hole-forming bolt 1 and the second hole-forming bolt 2, that is, the head 1 of the first hole-forming bolt and the head 2 of the second hole-forming bolt, the pressing member 3 is nested on and between the threaded screws of the first hole-forming bolt 1 and the second hole-forming bolt 2, and the fastening member 4 is connected to the threaded screws of the first hole-forming bolt 1 and the second hole-forming bolt 2 through threads. Secondly, the fastening pieces 4 at the two ends of the device are stretched outwards, the first hole bolt 1 and the second hole bolt 2 are simultaneously stretched and move towards each other, and the heads of the two are gradually close to and abut against the compression element 3 positioned between the heads of the two. Then, as the fastener 4 is further pulled, the heads of the first and second hole bolts 1 and 2 press the pressing member 3 at both ends, and the apparatus starts to be stressed and consumes energy. Finally, the compression element 3 reaches the limit compression state, and the device is in a tensioning state, so that the self-locking and limiting functions are realized.
Example 1 application of a sliding seismic isolation bearing
Referring to fig. 13-17, a sliding seismic isolation bearing using a staggered embedded self-resetting energy-consuming buffering and limiting device 5 includes the staggered embedded self-resetting energy-consuming buffering and limiting device 5, a bearing body, a connecting piece 12, a bolt 13 and a nut 14. Wherein, the support body is upper bracket board 6, corrosion resistant plate 7, polytetrafluoroethylene board 8, steel sheet 9, rubber layer 10, lower bearing plate 11 from top to bottom in proper order, can regard as bridge antidetonation support.
Referring to fig. 14-15, the connecting member 12 is a semicircular ring-shaped hanging ring, circular through holes are formed at both ends of the connecting member, circular through holes are also formed on the opposite surfaces of the upper support plate 6 and the lower support plate 11, and the connecting member 12 is connected with the circular through holes of the upper support plate 6 and the lower support plate 11 through bolts 13 and nuts 14. The staggered embedded self-resetting energy consumption buffering limiting device 5 is connected with the upper support 6 plate and the lower support plate 11 through connecting pieces 12.
Referring to fig. 16-17, the seismic isolation bearing generates large sliding deformation under the action of horizontal force, the upper support plate 6, the stainless steel plate 7 and the teflon plate 8 generate large horizontal relative displacement, the screw rods of the first perforated bolt 1 and the second perforated bolt 2 are stretched by the fastening piece 4, and the distance between the head parts of the first perforated bolt 1 and the second perforated bolt is reduced. Along with the displacement of the seismic isolation support, the compression element 3 positioned between the heads of the first perforated bolt 1 and the second perforated bolt 2 starts to be compressed, and the staggered embedded self-resetting energy consumption buffering limiting device 5 starts to exert the bearing capacity, the buffering capacity and the energy consumption capacity. When the displacement of the shock insulation support reaches a certain degree, the compression element 3 reaches an extreme compression state, the staggered embedded self-resetting energy dissipation buffering limiting device 5 reaches a tensioning state, the self-locking function is realized, and the limiting purpose is achieved.
Referring to fig. 13-17, one of the technical points of the present embodiment is to maintain a certain flexibility of horizontal displacement under small or medium shock, and to effectively limit the relative displacement between the upper support plate 6 and the lower support plate 11 in the horizontal and vertical directions under large shock.
Referring to fig. 13, the installation positions and the number of the staggered embedded self-resetting energy dissipation buffer limiting devices 5 and the number and the size of the compression elements 3 can be adjusted according to the actual design conditions of the seismic isolation support. Also, the seat may take other forms, such as a rubber seat, a lead seat, etc.
In conclusion, the embodiment greatly improves the buffering and multidirectional limiting capacity of the shock-isolating support under the action of an earthquake, increases the energy consumption capacity, the self-resetting capacity after the earthquake and the self-locking capacity, can realize small-space installation, can realize considerable deformability in a limited space, and provides a certain technical support for the design of the shock-isolating support.
Example 2 external damper using two stay cables
Referring to fig. 18 to 19, an external stay cable damper includes the staggered embedded self-resetting energy dissipation buffering limiting device 5 according to embodiment 1, a stay cable 15, a cable hoop 16, a support column 17, a connecting member 12, a bolt 13 and a nut 14.
Referring to fig. 18-19, the ferrule 16 is fixedly connected by two semicircular high-strength steel plates through bolts, and is sleeved on the outer surface of the stay cable 15. The support columns 17 are steel columns fixedly arranged on the bridge floor through welding or bolts. The connecting piece 12 is a semicircular ring-shaped hanging ring, circular through holes are processed at two ends of the connecting piece, meanwhile, circular through holes are also formed in the outer side of the hoop 16 and the top end of the supporting column 17, and the connecting piece 12 is connected with the circular through holes in the outer side of the hoop 16 and the top end of the supporting column 17 through bolts 13 and nuts 14. The staggered embedded self-resetting energy dissipation buffering limiting device 5 is connected with a hoop 16 and a supporting column 17 through a connecting piece 12.
Referring to fig. 18-19, the staggered embedded self-resetting energy-consuming buffering and limiting device 5 provides an external damper for the stay cable 15. Under the action of earthquake or wind load, the stay cable 15 can vibrate to generate larger displacement and speed, the compression element 3 in the staggered embedded self-resetting energy-consumption buffering limiting device 5 is compressed to generate corresponding damping force, a large amount of energy input into the stay cable 15 is consumed, and the earthquake or wind vibration reaction of the stay cable 15 is quickly attenuated, so that the shock absorption control effect is exerted.
Referring to fig. 18-19, the installation positions and the number of the staggered embedded self-resetting energy-consuming buffering and limiting devices 5, and the number and the size of the compression elements 3 can be adjusted according to the actual design conditions of the bridge and the stay cable.
Referring to fig. 20-21, a bridge limiting device comprises the staggered embedded self-resetting energy consumption buffer limiting device 5 according to embodiment 1, a girder 18, a bridge bearer 19, a pier 20, a fixed anchor plate 21, a connecting piece 12, a bolt 13 and a nut 14.
Referring to fig. 20-21, the girders 18 are positioned above the piers 20 by bridge supports 19. Fixed anchor plate 21 include bottom plate, riser and stiffener, the riser passes through welding mode with the bottom plate and is connected perpendicularly, the stiffener passes through welding mode with riser and bottom plate and is connected perpendicularly, processing has circular through-hole simultaneously on the riser, fixed anchor plate 21 passes through the bottom plate bolt setting at 18 lower surfaces of girder and 20 lateral walls of pier. The connecting piece 12 is a semicircular ring-shaped hanging ring, circular through holes are processed at two ends of the connecting piece, and the connecting piece 12 is connected with the circular through holes of the fixed anchor plate 21 through bolts 13 and nuts 14. The staggered embedded self-resetting energy dissipation buffering limiting device 5 is connected with the lower surface of a main beam 18 and the side wall of a pier 20 through a connecting piece 12.
Referring to fig. 20-21, when the device is not subjected to earthquake action, temperature action or wind load action, the staggered embedded self-resetting energy dissipation buffer limiting device 5 between the lower surface of the main beam 18 and the side wall of the pier 20 is in a natural unstressed state, and the stressed element 3 is in a natural unstressed state at the same time. When the actions are carried out, the main beam 18 and the pier 20 generate relative displacement, the staggered embedded self-resetting energy dissipation buffering limiting device 5 is stretched, and the heads of the first perforated bolt 1 and the second perforated bolt 2 are gradually closed. As the displacement gradually increases, the heads of the first and second hole bolts 1 and 2 start to contact and compress the compression element 3, the staggered in-line self-resetting energy dissipation buffer limiting device 5 starts to exert the bearing capacity, and the energy is consumed through the deformation of the compression element 3. When the displacement is increased to a certain degree, the compression element 3 is in an extreme compression state, and the staggered embedded self-resetting energy-consumption buffering limiting device 5 is self-locked, so that the relative displacement of the main beam 18 and the pier 20 is effectively limited, and the bridge deck is prevented from being seriously damaged or even collapsed due to overlarge displacement.
Referring to fig. 20-21, the installation positions and the number of the staggered embedded self-resetting energy consumption buffer limiting devices 5, and the number and the size of the compression elements 3 can be adjusted according to the actual design conditions of the bridge. Meanwhile, the seismic isolation bearing according to embodiment 1 may be included between the girder 18 and the pier 20 in the bridge according to embodiment 3 as a shock absorbing structure.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (5)
1. A staggered embedded type self-resetting energy dissipation buffering limiting device is characterized by comprising two perforated bolts with cross sections of screw rods staggered with each other, a pressed element sleeved on the screw rods of the perforated bolts, and a fastener arranged at the tail parts of the screw rods of the perforated bolts;
the perforated bolt comprises a first perforated bolt and a second perforated bolt, wherein reserved slideways which are completely communicated and are mutually staggered are processed in the longitudinal direction of the first perforated bolt and the second perforated bolt, and through the reserved slideways, a screw rod of the first perforated bolt and a screw rod of the second perforated bolt can be embedded into each other along the axial direction and can generate relative displacement;
the pressure element is provided with a circular through hole in the center of the cross section, the diameter of the circular through hole is the same as that of the screw rod of the hole-opening bolt, and the circular through hole is nested between the heads of the screw rods of the first hole-opening bolt and the second hole-opening bolt;
the fastener drives the two perforated bolts to axially move in opposite directions, so that the heads of the two perforated bolts gradually approach and press the compression element;
the first perforated bolt (1) and the second perforated bolt (2) are sequentially a cylindrical head, a non-threaded screw and a threaded screw from the head to the screw;
the first perforated bolt (1) and the second perforated bolt (2) are different only in screw section;
the screw section of the first tapping bolt (1) is provided with four fan rings which are symmetrically arranged, are not in contact with each other and are equal in size, the central angles of the fan rings are all 45 degrees, and the circle centers of the large fan shape and the small fan shape of the four fan rings are overlapped;
the screw section of the second perforated bolt (2) is formed by modifying the hollow circular sections at the inner sides of the four fan rings into a solid circular section on the basis of the screw section of the first perforated bolt;
the cross sections of the screws of the two perforated bolts extend to the full length of the bolts;
the screws of the first perforated bolt (1) and the second perforated bolt (2) are staggered with each other to form a complete circular section, so that the first perforated bolt (1) and the second perforated bolt (2) can be embedded into each other in the axial direction and can generate relative displacement, and the threaded screws of the first perforated bolt (1) and the second perforated bolt (2) are positioned outside the overlapped part of the first perforated bolt and the second perforated bolt.
2. The staggered in-line self-resetting dissipative damping stop device according to claim 1, wherein the compression element (3) is a compressible spring in the form of a ring spring, a coil spring or a disc spring.
3. The staggered embedded self-resetting energy consumption buffering and limiting device as claimed in claim 1, wherein the pressed element (3) is provided with a circular through hole at the center of the cross section, and the diameter of the circular through hole is the same as that of the screw rod of the hole bolt, so that the pressed element can be embedded in the overlapped part of the screw rods of the first hole bolt and the second hole bolt and can freely move along the axial direction of the first hole bolt and the second hole bolt; at the same time, the compression element (3) is located between the heads of the first and second hole bolts (1, 2).
4. The staggered embedded self-resetting energy consumption buffering and limiting device as claimed in claim 1, wherein the fastening member (4) is a cylindrical sleeve, and the sleeve is connected with the threaded screw of the perforated bolt through the inner thread of the sleeve;
the end part of the sleeve is provided with a semicircular annular connecting piece.
5. The staggered embedded self-resetting energy-consuming buffering and limiting device as claimed in claim 1, wherein the deformation mechanism is as follows:
firstly, in an original state, based on the cross screw sections of a first perforated bolt (1) and a second perforated bolt (2), the first perforated bolt and the second perforated bolt are embedded into each other in opposite directions, threaded screws of the first perforated bolt and the second perforated bolt are positioned outside the overlapping length of the first perforated bolt and the second perforated bolt, namely the threaded screws of the first perforated bolt and the second perforated bolt are positioned outside the head of the first perforated bolt and the head of the second perforated bolt, meanwhile, a compression element (3) is nested on the screws of the first perforated bolt and the second perforated bolt and between the heads of the first perforated bolt and the second perforated bolt, and a fastener (4) is connected with the threaded screws of the first perforated bolt and the second perforated bolt through threads;
secondly, the fasteners at the two ends of the device are stretched outwards, the first perforated bolt (1) and the second perforated bolt (2) are simultaneously stretched and move towards each other, and the heads of the first perforated bolt and the second perforated bolt are gradually close to and abut against a pressed element positioned between the heads of the first perforated bolt and the second perforated bolt;
then, the fastener (4) is continuously stretched, the heads of the first perforated bolt and the second perforated bolt press the compression element (3) at two ends simultaneously, and the device starts to bear force and consumes energy;
and finally, the compression element (3) reaches a limit compression state, and the device is in a tensioning state, so that the self-locking and limiting functions are realized.
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| CN202111192835.8A CN113818330B (en) | 2021-10-13 | 2021-10-13 | Staggered embedded self-reset energy consumption buffering limiting device |
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| CN202111192835.8A CN113818330B (en) | 2021-10-13 | 2021-10-13 | Staggered embedded self-reset energy consumption buffering limiting device |
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| CN113818330B CN113818330B (en) | 2022-10-14 |
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| JP2004116552A (en) * | 2002-09-24 | 2004-04-15 | Kayaba Ind Co Ltd | Vibration control damper |
| US20170167526A1 (en) * | 2014-02-06 | 2017-06-15 | Lock'n Bolt Corporation | Bolt provided with locking function |
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| CN113818330B (en) | 2022-10-14 |
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