CN116181141A - Triple friction pendulum shock absorption and insulation support improved by SMA inhaul cable - Google Patents
Triple friction pendulum shock absorption and insulation support improved by SMA inhaul cable Download PDFInfo
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- 230000035939 shock Effects 0.000 title claims abstract description 22
- 238000009413 insulation Methods 0.000 title claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 title claims description 6
- 238000002955 isolation Methods 0.000 claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000002783 friction material Substances 0.000 claims description 24
- 238000000576 coating method Methods 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001000 nickel titanium Inorganic materials 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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Abstract
The triple friction pendulum vibration reduction and isolation support is improved by an SMA inhaul cable and comprises a horizontal vibration isolation system and a limiting device system, wherein the horizontal vibration isolation system is a triple friction pendulum support mechanism, and the limiting device system consists of a limiting stop block and the SMA inhaul cable. The triple friction pendulum support mechanism consists of an upper support plate, a lower support plate, a first inner slide, a second inner slide and a core slide; SMA guy wires in the limiting device system are fixed between the upper support plate and the lower support plate, and stretch and compress along with the change of horizontal displacement. Each sliding surface is provided with a constraint ring as primary displacement limitation, and when the sliding block collides with the constraint ring, the sliding is limited; the SMA inhaul cable serves as an ultimate control to control the maximum displacement of the support. The super-elastic SMA inhaul cable is used as a limiting device and is combined with the triple friction pendulum support with five sliding stages to meet the shock insulation requirement that the structure possibly encounters different seismic grade effects in the whole life cycle.
Description
Technical Field
The invention relates to the technical field of seismic isolation and reduction of a large-span space structure, in particular to a seismic isolation and reduction support technology.
Background
The earthquake is taken as a random strong natural disaster, once the earthquake happens, the brought personal and social economic damages can not be estimated, and the large-span space structure is more responsible, carries more missions and ensures the functionality after the earthquake. Such as bridges, needs to ensure the usability of the bridge as an important channel for rescue and relief work, and the earthquake reduction and isolation technology is generated accordingly. The support has the advantages of simple replacement, low manufacturing cost and the like, and is selected as a main focus of the development of the seismic isolation technology, but the traditional support is poor in durability and weak in damping capacity, needs to be replaced frequently, and cannot meet the seismic requirements of a large-span space structure. Based on the above, there is an urgent need for a support that can well meet the seismic isolation requirements under different levels of seismic action and has multiple energy dissipation mechanisms with self-resetting function.
At present, the Chinese patent with the application number of 202111464121.8 discloses a three-dimensional shock insulation friction pendulum support with anti-pulling property, which is characterized in that an anti-pulling spring and a belleville spring are arranged between two support plates of a single friction pendulum support to play a role in resisting pulling. According to the invention, although the vertical anti-pulling spring is added to improve the vertical shock resistance, the single friction pendulum support is selected for transformation, and the selected anti-pulling spring provides vertical rigidity and simultaneously limits the horizontal displacement energy consumption capacity of the support, so that the horizontal shock absorption energy consumption capacity of the support cannot meet the requirements of strong shock effect or a large-span space structure.
Disclosure of Invention
The invention aims to provide a triple friction pendulum vibration reduction and isolation support improved by an SMA cable, which can well meet the vibration isolation requirements under the action of different level earthquakes and has a multiple energy consumption mechanism of a self-resetting function.
The invention relates to a triple friction pendulum shock absorption and isolation support improved by an SMA inhaul cable, which comprises a horizontal shock isolation system and a limiting device system, wherein the horizontal shock isolation system is a triple friction pendulum support mechanism, the triple friction pendulum support mechanism consists of an upper support plate 1, a lower support plate 2, a first inner sliding block 3, a second inner sliding block 4 and a core sliding block 5, and friction layers are arranged on concave-convex cambered surfaces of a first outer sliding surface 8, a second outer sliding surface 9, a first inner sliding surface 10 and a second inner sliding surface 11; the limiting device system consists of a limiting stop 7 and an SMA cable 6, wherein the SMA cable 6 is fixed between the upper support plate 1 and the lower support plate 2, and stretches and compresses along with the change of horizontal displacement; the horizontal vibration isolation system consists of an upper support plate 1, a lower support plate 2, a first inner slide block 3, a second inner slide block 4 and a core slide block 5, wherein the friction materials of concave-convex cambered surfaces of a first outer sliding surface 8, a second outer sliding surface 9, a first inner sliding surface 10 and a second inner sliding surface 11 are polytetrafluoroethylene coatings, and the friction coefficients of the sliding surfaces are controlled.
The beneficial effects of the invention are as follows: the invention considers the anti-seismic requirement of the whole life cycle of the structure, provides the damping energy consumption mechanism of the support under the condition of different levels of excitation, ensures excellent energy consumption capability, and can effectively prevent the support from failing due to overlarge relative displacement of the support by the upper structure, thereby causing disasters such as beam falling and the like. The triple friction pendulum support mechanism consists of an upper support plate, a lower support plate, a first inner slide, a second inner slide and a core slide; SMA guy wires in the limiting device system are fixed between the upper support plate and the lower support plate, and stretch and compress along with the change of horizontal displacement. Each sliding surface is provided with a constraint ring as primary displacement limitation, and when the sliding block collides with the constraint ring, the sliding is limited; the SMA inhaul cable serves as an ultimate control to control the maximum displacement of the support. The super-elastic SMA inhaul cable is used as a limiting device and is combined with the triple friction pendulum support with five sliding stages to meet the shock insulation requirement that the structure possibly encounters different seismic grade effects in the whole life cycle.
Drawings
Fig. 1 is a cross-sectional view of a triple friction pendulum vibration isolation mount modified with SMA cable according to the present invention, fig. 2 is a cross-sectional view of a triple friction pendulum vibration isolation mount modified with SMA cable in a swinging state, fig. 3 is a detailed view of components of a triple friction pendulum vibration isolation mount modified with SMA cable, fig. 4 is a schematic view of upper and lower mount plate structures of a triple friction pendulum vibration isolation mount modified with SMA cable, fig. 5 is a detailed structural view of SMA cable of a triple friction pendulum vibration isolation mount modified with SMA cable, fig. 6 is a cross-sectional structural view of SMA cable of a triple friction pendulum vibration isolation mount modified with SMA cable, and fig. 7 is an external view of a triple friction pendulum vibration isolation mount modified with SMA cable; in the figure, the upper support plate, the lower support plate, the first inner slide block, the second inner slide block, the 5-core slide block, the 6-SMA cable, the 7-limit stop, the 8-first outer sliding surface, the 9-second outer sliding surface, the 10-first inner sliding surface and the 11-second inner sliding surface are all made of friction materials, and the 101, 201, 301, 401 and 501-are made of friction materials, and the 601-fixing bolt, the 602-nut and the 603-SMA cable;
Detailed Description
As shown in fig. 1-7, the invention relates to a triple friction pendulum shock absorption and isolation support improved by an SMA cable, which comprises a horizontal shock isolation system and a limiting device system, wherein the horizontal shock isolation system is a triple friction pendulum support mechanism, the triple friction pendulum support mechanism consists of an upper support plate 1, a lower support plate 2, a first inner sliding block 3, a second inner sliding block 4 and a core sliding block 5, and concave-convex cambered surfaces of a first outer sliding surface 8, a second outer sliding surface 9, a first inner sliding surface 10 and a second inner sliding surface 11 are all provided with friction layers; the limiting device system consists of a limiting stop 7 and an SMA cable 6, wherein the SMA cable 6 is fixed between the upper support plate 1 and the lower support plate 2, and stretches and compresses along with the change of horizontal displacement; the horizontal vibration isolation system consists of an upper support plate 1, a lower support plate 2, a first inner slide block 3, a second inner slide block 4 and a core slide block 5, wherein the friction materials of concave-convex cambered surfaces of a first outer sliding surface 8, a second outer sliding surface 9, a first inner sliding surface 10 and a second inner sliding surface 11 are polytetrafluoroethylene coatings, and the friction coefficients of the sliding surfaces are controlled.
As shown in fig. 1 to 3, the upper surface of the first inner slide 3 is a convex arc surface, the upper surface of the first inner slide 3 is in contact with the first outer sliding surface 8 through a friction material 301, the lower surface of the first inner slide 3 is a concave arc surface, the lower surface of the first inner slide 3 is in contact with the first inner sliding surface 10 through the friction material 301, and the first outer sliding surface 8 and the first inner sliding surface 10 are coated with a friction material polytetrafluoroethylene coating;
the upper surface and the lower surface of the core sliding block 5 are both convex cambered surfaces, the upper surface and the lower surface are coated with friction material polytetrafluoroethylene coating, the upper surface of the core sliding block 5 is contacted with the first inner sliding surface 10 through the friction material 501, and the lower surface of the core sliding block 5 is contacted with the second inner sliding surface 11 through the friction material 501;
the second inner sliding block 4 is located right below the core sliding block 5, the upper surface of the second inner sliding block 4 is contacted with the second inner sliding surface 11 through a friction material 401, the second inner sliding surface 11 is a concave cambered surface, the lower surface of the second inner sliding block 4 is contacted with the second outer sliding surface 9 through a friction material 201, and the second outer sliding surface 9 and the second inner sliding surface 11 are coated with a friction material polytetrafluoroethylene coating; the parts are corresponding to each other in central line.
As shown in fig. 1, SMA cables 6 of the stop system are disposed between the upper and lower seat plates 1, 2 while being outside of a limit stop 7 at the seat plate, thereby controlling the maximum displacement of the seat.
As shown in fig. 1, 5 and 6, the SMA cable 6 includes an SMA cable 603 and a fixing bolt 601, 7 groups of SMA cables 6 are formed by twisting 49 SMA wires, two ends of the SMA cable 603 are fixed by the fixing bolt 601, and a ball nut 602 is fixed outside the fixing bolt 601.
As shown in fig. 1, 5 and 6, the number and the azimuth of the SMA cables 6 can be changed according to the requirement of the shock insulation capability, the number of the SMA cables is 8, 2 SMA cables 6 are respectively arranged in the transverse bridge direction and the longitudinal bridge direction, and 1 SMA cable 6 is respectively arranged in the other 45-degree azimuth along the transverse bridge direction or the longitudinal bridge direction, and 4 SMA cables are respectively arranged in total.
As shown in fig. 1, 2 and 7, primary limit stops in the limit device are respectively arranged on the outer rings of the upper support plate 1, the lower support plate 2, the first inner slide 3 and the second inner slide 4, so that the core slide 5, the first inner slide 3 and the second inner slide 4 are ensured to reset in time in the sliding process, and the movement form of the next stage is triggered.
As shown in fig. 1 and 2, the radius of curvature of the first outer sliding surface 8 is the same as that of the second outer sliding surface 9, the coefficient of friction is different, the coefficient of friction of the first outer sliding surface 8 is greater than that of the second outer sliding surface 9, and the radius of curvature and the coefficient of friction of the first inner sliding surface 10 are equal to those of the second inner sliding surface 11; the friction coefficients of the sliding surfaces are from big to small in the following order: the first outer sliding surface 8, the second outer sliding surface 9, the first inner sliding surface (10) are equal to the second inner sliding surface (11).
As shown in fig. 1 and 2, the first inner slide (3), the second inner slide (4) and the core slide (5) can slide in any direction from the center, and are adaptive.
The working procedure of the invention is as follows: according to the mass and other external loads of the upper structure calculated by engineering practice, combining the earthquake-proof fortification requirement and the earthquake-proof requirement of the engineering structure, customizing a multiple friction pendulum earthquake-reduction and isolation support improved by an SMA inhaul cable of different types, and sheathing the support with a protective sleeve to prevent damage such as rust and the like caused by long-term exposure to the external environment; and the upper and lower support plate mounting bolts are respectively connected with the upper structure and the lower structure to finish the mounting.
When no earthquake occurs, the multiple friction pendulum vibration reduction and isolation support improved by the SMA inhaul cable is only used as a traditional support for transmitting the load of an upper structure and connecting the upper structure and the lower structure.
When a small shock occurs, the horizontal force applied to the bearing is greater than the minimum friction force, and the core slider 5 first slides on the first inner sliding surface 10 and the second inner sliding surface 11.
When the middle vibration occurs, the horizontal thrust borne by the support is continuously increased, after the core sliding block 5 continues to slide to the stop block contacting the first inner sliding block 3, the first inner sliding block 3 is triggered to start sliding on the first outer sliding surface 8, the relative displacement of the support is increased, the self-vibration period of the structure is prolonged, the energy dissipation is increased, the SMA inhaul cable 6 properly controls the relative displacement to be overlarge, and the vibration amplitude of the upper structure is prevented from being overlarge.
When a major shock occurs, the horizontal thrust borne by the support reaches an extreme, the bottom end of the core sliding block 5 contacts with the stop block of the second inner sliding block 4, and pushes the bottom end of the second inner sliding block 4 to contact with the stop block of the lower support plate 2, so that the first inner sliding block 3 is triggered to slide on the first outer sliding surface 8, at the moment, the first inner sliding block 3 and the second inner sliding block 4 respectively slide on the four sliding surfaces at the same time, but due to the fact that the horizontal relative displacement of the support is overlarge at the moment, the first inner sliding block 3 or the second inner sliding block 4 possibly breaks through the stop blocks of the upper support plate 1 and the lower support plate 2 to slide out, so that the support is damaged, at the moment, the SMA guy cable 6 plays a role, and the SMA guy cable itself provides a horizontal component force generated by stretching deformation to serve as a resistance to drive the support plate to move in the opposite direction until the support plate is reset, and due to the superelastic characteristic of nickel-titanium alloy, the nickel-titanium alloy generates extremely small plastic deformation during the support reset, and the initial length can be basically ensured.
The invention will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1, the triple friction pendulum vibration reduction and isolation support improved by an SMA cable according to the embodiment of the invention comprises a horizontal vibration isolation system and a limiting device system, wherein the horizontal vibration isolation system is a triple friction pendulum support mechanism and consists of an upper support plate 1, a lower support plate 2, a first inner sliding block 3, a second inner sliding block 4, a core sliding block 5, a limiting stop 7 and the SMA cable 6, and the limiting device system consists of the limiting stop 7 and the SMA cable 6.
An SMA guy cable 6 in the limiting device system is fixed between the upper support plate 1 and the lower support plate 2, and stretches and compresses along with the change of horizontal displacement; a circle of stop blocks 7 are arranged on each sliding surface and used as primary displacement limitation, and the sliding is limited when the sliding block collides with the stop blocks; the SMA cable 6 serves as an ultimate control to control the maximum displacement of the support.
As shown in fig. 1, the upper seat plate 1, the lower seat plate 2, the first inner slide 3, the second inner slide 4 and the core slide 5 are adjacently arranged in the up-down direction, the first inner slide 3 is positioned below the upper seat plate 1, the core slide 5 is positioned below the first inner slide 3 and above the second inner slide 4, and the upper and lower seat plates and the slide can relatively move in the horizontal direction; the lower terminal surface of upper bracket board is first outer sliding surface 8, and the lower surface of first interior slider 3 is first interior sliding surface 10, and the upper surface of second interior slider 4 is second interior sliding surface 11, and the upper surface of lower bracket board 2 is second outer sliding surface 9, and each sliding surface is unsmooth cambered surface, and all scribbles friction material.
Specifically, the upper surface of the first inner slide 3 is attached to the first outer slide surface 8, the upper surface of the core slide 5 is attached to the first inner slide surface 10, the lower surface of the core slide 5 is attached to the second inner slide surface 11, and the lower surface of the second inner slide 4 is attached to the second outer slide surface 9.
Specifically, the curvature radiuses of the first outer sliding surface 8 and the second outer sliding surface 9 are the same, the curvature radiuses of the first inner sliding surface 10 and the second inner sliding surface 11 are the same, the curvature radiuses of the two surfaces which are jointed mutually are the same, but the areas of the four sliding surfaces are respectively larger than the surfaces which are jointed mutually, so that sliding is relatively stable.
Specifically, the friction coefficient of the first outer sliding surface 8 is the maximum, the friction coefficient of the second outer sliding surface 9 is smaller than that of the first outer sliding surface 8 but larger than that of the first inner sliding surface 10, the friction coefficients of the first inner sliding surface 10 and the second inner sliding surface 11 are the same, and at this time, the sliding mechanisms of the support are three, and the three correspond to small shock, medium shock and large shock respectively.
Specifically, the specification of the SMA cable 6 is designed according to indexes such as different fortification conditions, damping and energy consumption performance, cost budget and the like, and comprises the thickness, the length, the number and the strength of the SMA cable. First, the cross-sectional area of the required SMA cable 6 is calculated, typically 7 groups of nitinol SMA wires, 7 per group, and each diameter of 1mm are selected. Secondly, setting the length of the SMA inhaul cable 6 according to the requirement, and making a margin with a certain length, namely designing the SMA inhaul cable to start to play a role in a certain sliding stage of the support; then, the number of SMA inhaul cables 6 is increased or decreased according to the earthquake fortification intensity and the earthquake resistance level of the area where the structure is located; and finally, forming the strength of the SMA inhaul cable 6 according to the specification so as to meet engineering requirements.
In actual engineering, the upper support plate 1 is connected with the bridge superstructure, and the lower support plate 2 is connected with the bridge substructure or foundation, so as to reduce the response of seismic excitation to the superstructure.
Specifically, the vertical load of the upper structure is transferred to the first inner slide 3 through the upper support plate 1, and then transferred to the lower support plate 2 through the core slide 5 and the second outer slide 4, and the top end of the sma cable 6 also bears the vertical load from the upper support plate 1 and transfers to the lower support plate 2 along the cable, and finally transfers to the lower structure or foundation together with the vertical load borne by the slide.
Specifically, the earthquake excitation drives the pier column to swing horizontally through the pier column or the foundation by the lower structure or the foundation, and the horizontal displacement is transmitted through the lower support plate 2, and then the earthquake excitation is transmitted to the upper structure after the drawing and pressing energy of the second inner slide 4, the core slide 5, the first inner slide 3 and the upper support plate 1 and the SMA inhaul cable 6 are consumed; due to the combined action of the sliding blocks in the support and the SMA inhaul cable 6, a sliding mechanism is selected according to the horizontal force transmitted to the support plate, so that the self-vibration period of the structure is prolonged, and the effect of reducing the structural response is achieved.
The above embodiments of the present invention are only examples, and the present invention is not limited thereto, and those skilled in the art can make modifications, variations and substitutions within the allowable scope of the present invention.
Claims (8)
1. The triple friction pendulum shock absorption and isolation support is characterized in that the triple friction pendulum support mechanism consists of an upper support plate (1), a lower support plate (2), a first inner sliding block (3), a second inner sliding block (4) and a core sliding block (5), wherein a friction layer is arranged on concave-convex cambered surfaces of a first outer sliding surface (8), a second outer sliding surface (9), a first inner sliding surface (10) and a second inner sliding surface (11); the limiting device system consists of a limiting stop (7) and an SMA inhaul cable (6), wherein the SMA inhaul cable (6) is fixed between the upper support seat plate (1) and the lower support seat plate (2) and stretches and compresses along with the change of horizontal displacement; the horizontal vibration isolation system consists of an upper support plate (1), a lower support plate (2), a first inner slide block (3), a second inner slide block (4) and a core slide block (5), wherein the friction materials of concave-convex cambered surfaces of a first outer sliding surface (8), a second outer sliding surface (9), a first inner sliding surface (10) and a second inner sliding surface (11) are polytetrafluoroethylene coatings, and the friction coefficients of the sliding surfaces are controlled.
2. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the upper surface of the first inner sliding block (3) is a convex arc surface, the upper surface of the first inner sliding block (3) is contacted with the first outer sliding surface (8) through a friction material (301), the lower surface of the first inner sliding block (3) is a concave arc surface, the lower surface of the first inner sliding block (3) is contacted with the first inner sliding surface (10) through the friction material (301), and the first outer sliding surface (8) and the first inner sliding surface (10) are coated with a friction material polytetrafluoroethylene coating;
the upper surface and the lower surface of the core sliding block (5) are both convex cambered surfaces, the upper surface and the lower surface are coated with friction material polytetrafluoroethylene coating, the upper surface of the core sliding block (5) is contacted with the first inner sliding surface (10) through the friction material (501), and the lower surface of the core sliding block (5) is contacted with the second inner sliding surface (11) through the friction material (501);
the second inner sliding block (4) is positioned right below the core sliding block (5), the upper surface of the second inner sliding block (4) is contacted with the second inner sliding surface (11) through a friction material (401), the second inner sliding surface (11) is a concave cambered surface, the lower surface of the second inner sliding block (4) is contacted with the second outer sliding surface (9) through a friction material (201), and the second outer sliding surface (9) and the second inner sliding surface (11) are coated with a friction material polytetrafluoroethylene coating;
the parts are corresponding to each other in central line.
3. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: an SMA cable (6) of the limiting device system is arranged between the upper support plate (1) and the lower support plate (2), and meanwhile, the SMA cable is arranged outside a limiting stop block (7) at the support plate, so that the maximum displacement of the support is controlled.
4. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the SMA cable (6) comprises an SMA cable (603) and a fixing bolt (601), 7 groups of SMA cables (6) are formed by twisting 49 SMA wires in total, two ends of the SMA cable (603) are fixed through the fixing bolt (601), and a ball nut (602) is fixed outside the fixing bolt (601).
5. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the arrangement number and the azimuth of the SMA inhaul cables (6) can be changed according to the shock insulation capacity requirement, the number of the SMA inhaul cables is 8, 2 SMA inhaul cables (6) are respectively arranged in the transverse bridge direction and the longitudinal bridge direction, 1 SMA inhaul cable is respectively arranged in the other 45-degree azimuth along the transverse bridge direction or the longitudinal bridge direction, and 4 SMA inhaul cables are totally arranged.
6. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the primary limit stop in the limit device is respectively arranged on the outer rings of the upper support plate (1), the lower support plate (2), the first inner slide (3) and the second inner slide (4), so that the core slide (5), the first inner slide (3) and the second inner slide (4) are ensured to reset in time in the sliding process, and the movement form of the next stage is triggered.
7. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the curvature radius of the first outer sliding surface (8) is the same as that of the second outer sliding surface (9), the friction coefficient is different, the friction coefficient of the first outer sliding surface (8) is larger than that of the second outer sliding surface (9), and the curvature radius and the friction coefficient of the first inner sliding surface (10) are equal to those of the second inner sliding surface (11); the friction coefficients of the sliding surfaces are from big to small in the following order: the first outer sliding surface (8), the second outer sliding surface (9) and the first inner sliding surface (10) are equal to the second inner sliding surface (11).
8. The SMA cable improved triple friction pendulum vibration reduction and isolation mount of claim 1 wherein: the first inner slide block (3), the second inner slide block (4) and the core slide block (5) can slide from the center to any direction, and the self-adaption is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310292782.XA CN116181141A (en) | 2023-03-24 | 2023-03-24 | Triple friction pendulum shock absorption and insulation support improved by SMA inhaul cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310292782.XA CN116181141A (en) | 2023-03-24 | 2023-03-24 | Triple friction pendulum shock absorption and insulation support improved by SMA inhaul cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117364953A (en) * | 2023-10-12 | 2024-01-09 | 广州大学 | Variable-rigidity triple friction pendulum support |
| CN117888633A (en) * | 2023-12-22 | 2024-04-16 | 中国建筑西北设计研究院有限公司 | Spring type tensile composite support |
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| CN101705656A (en) * | 2009-11-20 | 2010-05-12 | 北京工业大学 | Long-span bridge three-sphere frictional sliding shock isolation support saddle |
| CN102758402A (en) * | 2011-04-28 | 2012-10-31 | 中交公路规划设计院有限公司 | Pulling-resistant frictional oscillating support for seismic reduction and isolation |
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| CN115710981A (en) * | 2022-11-28 | 2023-02-24 | 华中科技大学 | SMA-negative stiffness friction pendulum support with limiting function |
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Cited By (4)
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| CN117364953A (en) * | 2023-10-12 | 2024-01-09 | 广州大学 | Variable-rigidity triple friction pendulum support |
| CN117364953B (en) * | 2023-10-12 | 2024-05-14 | 广州大学 | Variable-rigidity triple friction pendulum support |
| CN117888633A (en) * | 2023-12-22 | 2024-04-16 | 中国建筑西北设计研究院有限公司 | Spring type tensile composite support |
| CN117888633B (en) * | 2023-12-22 | 2024-06-25 | 中国建筑西北设计研究院有限公司 | Spring type tensile composite support |
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