CN213086550U - Multistage-response composite friction pendulum vibration reduction and isolation support - Google Patents
Multistage-response composite friction pendulum vibration reduction and isolation support Download PDFInfo
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- CN213086550U CN213086550U CN202021656684.8U CN202021656684U CN213086550U CN 213086550 U CN213086550 U CN 213086550U CN 202021656684 U CN202021656684 U CN 202021656684U CN 213086550 U CN213086550 U CN 213086550U
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Abstract
The utility model belongs to the technical field of subtract shock insulation, specific saying relates to a compound friction pendulum of multistage response subtracts isolation bearing. The spherical surface lining plate and the middle support plate are arranged between the upper support plate and the lower support plate; wherein, upper bracket board and sphere welt have first spherical friction pair, and sphere welt and well bedplate have second spherical friction pair, and well bedplate and bottom suspension bedplate have third spherical friction pair, and the vice friction coefficient of second spherical friction pair, first spherical friction pair, third spherical friction pair increases in proper order, and it corresponds conventional operating mode load impact force respectively, meets and establishes defences earthquake impact force, rare meets earthquake impact force and carries out the work response. The novel shock absorption and isolation support seat utilizes the spherical friction pendulum with different friction coefficients and different spherical curvature radiuses to realize that the support seat responds to different horizontal rigidity to adapt to the change of seismic intensity, and has the characteristics of simple and compact structure, multistage response impact and excellent shock absorption and isolation effect.
Description
Technical Field
The utility model belongs to the technical field of subtract shock insulation, specific saying relates to a compound friction pendulum of multistage response subtracts isolation bearing.
Background
Earthquake disasters are sudden and destructive, and the strong impact of the earthquake disasters often causes serious damage to building structures such as bridges and the like, thereby bringing huge life and property losses. Therefore, the seismic isolation support is very necessary to be adopted on the bridge light building structure, and the bridge beam body can be ensured to generate certain displacement, rotation and swing on the support during the earthquake, so that the earthquake energy is consumed to the greatest extent, and the damage effect of earthquake impact on the building structures such as bridges is reduced.
At present, the types of seismic isolation and reduction devices which are applied more at home and abroad are more, and mainly comprise seismic isolation rubber supports (lead core supports and high damping rubber supports), deformed steel supports (E-shaped steel, C-shaped steel and nonlinear damping type) and friction pendulum seismic isolation and reduction supports. The natural vibration damping support is a friction damping support, the normal function of the support is realized by the friction of two curved surfaces, an upper support plate or a lower support plate of the support is a concave spherical surface with a larger radius, the swing spherical plate of the central part of the support during earthquake generates swing displacement along the concave spherical surface of the upper support plate or the lower support plate, the self-vibration period of a lower structure is prolonged by utilizing a simple pendulum mechanism, so that the action of earthquake force is reduced, meanwhile, when the swing spherical plate swings along the upper support plate or the lower support plate during earthquake, the elevation of a spherical panel is changed, the upper structure is lifted, and the purpose of consuming earthquake energy is achieved by applying work through potential energy.
The friction pendulum seismic mitigation and isolation support is generally only provided with a concave surface with a larger radius, namely a curvature radius, and only one horizontal displacement rigidity, so that the friction pendulum seismic mitigation and isolation support cannot make appropriate response aiming at different impact strength, particularly cannot adapt to the variation of intensity to adjust when an earthquake disaster occurs, has large working load of a single friction pair and serious abrasion, and shortens the service life of the friction pendulum seismic mitigation and isolation support; secondly, the friction coefficient is large, so that resistance is generated when the support rotates normally, and the normal work of the support under the conventional working condition is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multistage response's compound friction pendulum subtracts isolation bearing, this support utilizes the different changes that realize the different horizontal rigidity of support response and adapt to the earthquake intensity of the spherical friction pendulum and the spherical curvature radius of different coefficient of friction to the curved surface friction that utilizes less coefficient of friction is vice maintains the normal rotation function of support, distinguishes mutually with the response under the earthquake operating mode, and has multistage shock attenuation and isolation's effect.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a multistage response's compound friction pendulum subtracts isolation bearing which characterized in that: the device comprises an upper support plate, a lower support plate, a spherical lining plate and a middle support plate which are assembled; wherein, upper bracket board and sphere welt have first spherical friction pair, sphere welt and well bedplate have second spherical friction pair, well bedplate and undersetting board have third spherical friction pair, the vice friction coefficient of second spherical friction, first spherical friction pair, third spherical friction pair increase in proper order, and it corresponds conventional operating mode load impact strength respectively, meets and establishes defences earthquake impact strength, rare meets earthquake impact strength and carries out the job response.
The additional technical characteristics of the compound friction pendulum seismic mitigation and isolation bearing with multistage response further comprise:
the friction coefficient of the wear plate of the second spherical friction pair is not higher than 0.03, the friction coefficient of the wear plate of the first spherical friction pair is between 0.03 and 0.05, and the friction coefficient of the wear plate of the third spherical friction pair is not lower than 0.05;
-one or both sides of the wear plate in the second spherical friction pair are provided with a lubricating silicone grease layer;
the lower support plate is provided with a transverse barrier strip assembly and a longitudinal barrier strip assembly which limit the edge of the upper support plate, and the shear bolts of the transverse barrier strip assembly and the longitudinal barrier strip assembly have different strengths so as to realize the purpose of removing the limit stage by stage;
the lower surface of the upper support plate and the upper surface of the lower support plate are respectively concave spherical surfaces which are respectively matched with the convex spherical surfaces of the upper surface of the spherical lining plate and the lower surface of the middle support plate; the convex spherical surface of the lower surface of the spherical lining plate is matched with the concave spherical surface of the upper surface of the middle support plate;
the radius of curvature of the concave spherical surface on the lower surface of the upper seat plate forming the first spherical friction pair is smaller than the radius of curvature of the concave spherical surface on the upper surface of the lower seat plate forming the third spherical friction pair; the curvature radius of the convex spherical surface on the upper surface of the spherical lining plate forming the first spherical friction pair is larger than that of the convex spherical surface on the lower surface of the spherical lining plate forming the second spherical friction pair.
The utility model provides a compound friction pendulum subtracts isolation bearing of multistage response compares with prior art, has following advantage: firstly, the composite friction pendulum seismic mitigation and isolation support forms a first spherical friction pair, a second spherical friction pair and a third spherical friction pair respectively through an upper support plate, a spherical lining plate, a middle support plate and a lower support plate which are sequentially arranged, and the friction coefficients of the composite friction pendulum seismic mitigation and isolation support are different, so that multistage response of a plurality of friction pendulums of the support in stages of load impact, horizontal rigidity and seismic intensity of different strengths is realized, the seismic mitigation and isolation performance of the support is enhanced, and the service life of the support is prolonged; and secondly, because the friction coefficient of the second spherical friction pair is the lowest, the second spherical friction pair is used for realizing the normal rotation function of the support under the conventional working condition and reducing the corner resistance, the friction coefficients of the first and third spherical friction pairs are sequentially increased and are matched with the upper and lower spherical curved surface radiuses set to be different numerical values, the composite-structure friction pendulum seismic isolation support has good self-adaptive performance and dynamic self-control capability to the earthquake and obviously prolongs the service life of the support, compared with a single friction pendulum and a seismic isolation support with a curvature radius, the composite-structure friction pendulum seismic isolation support has good self-adaptive performance and dynamic self-control capability to the earthquake and has independent working response intervals, the problems of excessive wear, insensitive seismic isolation response and the like can not occur.
Drawings
Fig. 1 is the utility model relates to a multistage response's compound friction pendulum subtracts isolation bearing's structural schematic.
Detailed Description
The structure and the working principle of the compound friction pendulum seismic isolation and reduction support with multi-stage response provided by the invention are further described in detail with reference to the attached drawings.
Referring to fig. 1, it is the structural schematic diagram of the compound friction pendulum seismic isolation and reduction support with multi-level response provided by the utility model. The structure of the composite friction pendulum seismic mitigation and isolation support comprises an upper support plate 1, a lower support plate 2, a spherical lining plate 3 and a middle support plate 4 which are assembled, wherein the spherical lining plate 3 and the middle support plate 4 are arranged between the upper support plate and the lower support plate; wherein, upper bracket board 1 and spherical welt 3 have first spherical friction pair 5, spherical welt 3 and well bedplate 4 have second spherical friction pair 6, well bedplate 4 and bottom suspension board 2 have third spherical friction pair 7, second spherical friction pair 6, first spherical friction pair 5, the coefficient of friction of third spherical friction pair 7 increases in proper order, it corresponds conventional operating mode load impact strength respectively, meet and set up defences earthquake impact strength more, rare meets earthquake impact strength and carries out the work response.
The working principle is as follows: an upper support plate 1 and a lower support plate 2 of the support are respectively arranged on a beam end and an abutment, a spherical lining plate 3 and a middle support plate 4 are arranged between the upper support plate and the lower support plate, a first friction pair, a second friction pair and a third friction pair (5, 6 and 7) are sequentially formed from top to bottom, and the friction coefficients of the second spherical friction pair 6, the first spherical friction pair 5 and the third spherical friction pair 7 are sequentially increased, namely the second spherical friction pair 6 realizes the normal rotation function of the support and corresponds to the load impact strength of the conventional working condition; the first spherical friction pair 5 and the third spherical friction pair 7 respectively correspond to multiple earthquake impact strength and protection earthquake impact strength rarely encountered, and the aims of multistage response and self-adaptive adjustment are achieved.
In the structure of the composite friction pendulum vibration reduction and isolation support,
according to different working conditions, the friction coefficient of the wear plate of the second spherical friction pair 6 is not higher than 0.03, so that the support has enough rotation function to maintain normal operation; the friction coefficient of the wear-resisting plate of the first spherical friction pair 5 is between 0.03 and 0.05 so as to meet the seismic reduction and isolation requirements of a plurality of earthquakes; the friction coefficient of the wear-resisting plate of the third spherical friction pair 7 is not lower than 0.05, and the general value range is between 0.05 and 0.07, so that the support has enough horizontal rigidity and damping performance under the condition of rare earthquakes, and the shock resistance of building structures such as bridges is improved;
preferably, the lubricating silicone grease layer 61 is arranged on one side or both sides of the wear-resisting plate in the second spherical friction pair 6, so that the sliding effect of second spherical friction can be improved, the corner resistance of the bridge support is effectively reduced, the sensitivity of the support is improved, the wear of each friction part of the support is relieved, and the service life is prolonged;
as a preferred embodiment, the lower support plate 2 is provided with a horizontal barrier component 81 and a vertical barrier component 82 which limit the edge of the upper support plate 1, the shear bolts 80 of the horizontal barrier component 81 and the vertical barrier component 82 have different strengths to achieve the purpose of removing the limit step by step, the horizontal barrier component 81 and the vertical barrier component 82 respectively limit the upper support plate 1 from the vertical direction and the horizontal direction, so as to achieve the purpose of limiting the first spherical friction pair 5, when a multi-earthquake or a defense earthquake occurs, the shear bolt of the barrier component is broken, at this time, the first spherical friction pair 5 acts, further, the shear bolts 80 of the horizontal barrier component 81 and the vertical barrier component 82 have different strengths, the barrier component can be set according to the bridge trend, for example, the shear force in the bridge direction is lower than the shear force in the horizontal bridge direction, and the barrier component can be set according to the impact type and the direction of the earthquake occurring in the construction region, for example, the shearing force in the earthquake impact direction with lower intensity is lower than that in the earthquake impact direction with higher intensity, namely the transverse barrier strip assembly and the longitudinal barrier strip assembly realize the staged release of the limit on the first spherical friction pair 5, so that the staged response of the support is more refined;
preferably, the lower surface of the upper support plate 1 and the upper surface of the lower support plate 2 are respectively concave spherical surfaces, which are respectively matched with the convex spherical surfaces of the upper surface of the spherical lining plate 3 and the lower surface of the middle support plate 4, that is, the lower surface of the upper support plate 1 has the same radius of curvature as the upper surface of the spherical lining plate 3, and the upper surface of the lower support plate 2 has the same radius of curvature as the lower surface of the middle support plate 4; the convex spherical surface of the lower surface of the spherical lining plate 3 is matched with the concave spherical surface of the upper surface of the middle support plate 4, namely the curvature radiuses of the convex spherical surface and the concave spherical surface are the same; the plate bodies on the two sides of the improved support friction pair have the same spherical curvature radius, and the spherical centers are positioned in the same vertical direction, so that the overall support assembly structure is firm and stable, each friction pair moves smoothly after impact response, the sensitivity is high, and the shock absorption and isolation effect is outstanding;
further, the curvature radius of the concave spherical surface of the lower surface of the upper support plate 1 forming the first spherical friction pair 5 is smaller than that of the concave spherical surface of the upper surface of the lower support plate 2 forming the third spherical friction pair 7; the curvature radius of the convex spherical surface on the upper surface of the spherical lining plate 3 forming the first spherical friction pair 5 is larger than that of the convex spherical surface on the lower surface of the spherical lining plate forming the second spherical friction pair 6, namely, the three friction pairs are subjected to response change step by step along with the increase of displacement amplitude according to the horizontal rigidity and damping ratio of earthquake impact, so that the support can adapt to various working conditions such as conventional load, frequent and fortification earthquakes, rare earthquakes and the like, and has good strain performance and self-adjusting capability.
Claims (6)
1. The utility model provides a multistage response's compound friction pendulum subtracts isolation bearing which characterized in that: the device comprises an upper support plate, a lower support plate, a spherical lining plate and a middle support plate which are assembled; wherein, upper bracket board and sphere welt have first spherical friction pair, sphere welt and well bedplate have second spherical friction pair, well bedplate and undersetting board have third spherical friction pair, the vice friction coefficient of second spherical friction, first spherical friction pair, third spherical friction pair increase in proper order, and it corresponds conventional operating mode load impact strength respectively, meets and establishes defences earthquake impact strength, rare meets earthquake impact strength and carries out the job response.
2. The compound friction pendulum seismic mitigation and isolation bearing with multi-stage response according to claim 1, wherein: the friction coefficient of the wear plate of the second spherical friction pair is not higher than 0.03, the friction coefficient of the wear plate of the first spherical friction pair is between 0.03 and 0.05, and the friction coefficient of the wear plate of the third spherical friction pair is not lower than 0.05.
3. The compound friction pendulum seismic mitigation and isolation bearing with multi-stage response according to claim 2, wherein: and one side or two sides of the wear-resisting plate positioned in the second spherical friction pair are provided with lubricating silicone grease layers.
4. The compound friction pendulum seismic mitigation and isolation bearing with multi-stage response according to claim 1, wherein: the lower support plate is provided with a transverse barrier strip assembly and a longitudinal barrier strip assembly which limit the edge of the upper support plate, and the shear bolts of the transverse barrier strip assembly and the longitudinal barrier strip assembly have different strengths so as to realize that the limit is removed stage by stage.
5. The compound friction pendulum seismic mitigation and isolation bearing with multi-stage response according to claim 1, wherein: the lower surface of the upper support plate and the upper surface of the lower support plate are respectively concave spherical surfaces which are respectively matched with the convex spherical surfaces of the upper surface of the spherical lining plate and the lower surface of the middle support plate; the convex spherical surface of the lower surface of the spherical lining plate is matched with the concave spherical surface of the upper surface of the middle support plate.
6. The compound friction pendulum seismic mitigation and isolation bearing with multi-stage response according to claim 1 or 5, wherein: the curvature radius of the concave spherical surface of the lower surface of the upper support plate forming the first spherical friction pair is smaller than that of the concave spherical surface of the upper surface of the lower support plate forming the third spherical friction pair; the curvature radius of the convex spherical surface on the upper surface of the spherical lining plate forming the first spherical friction pair is larger than that of the convex spherical surface on the lower surface of the spherical lining plate forming the second spherical friction pair.
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| CN202021656684.8U CN213086550U (en) | 2020-08-11 | 2020-08-11 | Multistage-response composite friction pendulum vibration reduction and isolation support |
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| CN202021656684.8U CN213086550U (en) | 2020-08-11 | 2020-08-11 | Multistage-response composite friction pendulum vibration reduction and isolation support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802453A (en) * | 2021-09-14 | 2021-12-17 | 洛阳双瑞特种装备有限公司 | Horizontal positioning and height-adjusting support for magnetic suspension rail transit bridge |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802453A (en) * | 2021-09-14 | 2021-12-17 | 洛阳双瑞特种装备有限公司 | Horizontal positioning and height-adjusting support for magnetic suspension rail transit bridge |
| CN113802453B (en) * | 2021-09-14 | 2024-04-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Transverse position-adjusting height-adjusting support for magnetic suspension rail transit bridge |
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