A Variable Friction Spherical-Cylindrical Friction Bearing

A technology of variable friction and cylindrical surface, applied in bridge parts, building components, bridges, etc., can solve the problems of structural resonance, increase structural seismic response, etc., achieve the effect of simple structure, prolong service life, and protect from damage

Active Publication Date: 2018-03-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the problem that the rigidity and damping of the existing friction pendulum bearing are constant, resulting in resonance of the structure and increasing the seismic response of the structure, and further provides a variable friction spherical-cylindrical friction bearing

Method used

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  • A Variable Friction Spherical-Cylindrical Friction Bearing
  • A Variable Friction Spherical-Cylindrical Friction Bearing
  • A Variable Friction Spherical-Cylindrical Friction Bearing

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specific Embodiment approach 1

[0019] Specific implementation mode one: as Figure 1-8 As shown, the variable friction spherical-cylindrical friction bearing of this embodiment includes a cover plate 4, a slider 5, a chute 6 and a connecting steel plate 7, the chute 6 is installed on the upper end surface of the connecting steel plate 7, and the sliding block 5 is located in the chute 6, the upper half of the slider 5 is hemispherical, and the center of the lower end of the cover plate 4 is processed with a hemispherical groove matching the slider 5, and the cover plate 4 is supported on the chute 6 by the slider 5 On the upper end face of the chute, the outline of the left half of the chute 6 is rectangular, the outline of the right half of the chute is semicircular, the left half of the chute 6 is processed with a cylindrical groove 9, and the right half of the chute 6 Spherical groove 8 is processed on the inside, and the arc surface radius of cylindrical groove 9 is set the same as the arc surface radiu...

specific Embodiment approach 2

[0031] Specific implementation mode two: as Figure 2-8 As shown, the radius of curvature of the bottom surface of the slider 5 in this embodiment is consistent with the radius of curvature of the chute 6 . Such a design can make effective contact between the slider 5 and the chute 6, increase the effective friction of the friction pendulum support, improve the sliding energy dissipation capacity, and reduce the stress concentration of the chute 6, reduce collisions, reduce wear, and extend Support life. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0032] Specific implementation mode three: as Figure 2-8 As shown, the spherical radius of the upper hemisphere of the slider 5 in this embodiment is consistent with the radius of the hemispherical groove on the cover plate 4 . Such a design can make effective contact between the slider 5 and the hemispherical groove on the cover plate 4, increase the effective friction of the friction pendulum support, improve the sliding energy dissipation capacity, and reduce the friction of the hemispherical groove on the cover plate 4. Stress concentration reduces collision, reduces wear and prolongs the service life of the support. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

A variable friction spherical-cylindrical friction bearing relates to a friction bearing. The invention solves the problem that the rigidity and damping of the existing friction pendulum support are constant, resulting in resonance of the structure and increasing the seismic response of the structure. The chute is installed on the upper end surface of the connecting steel plate, the slider is located in the chute, the upper half of the slider is hemispherical, and the center of the lower end of the cover is processed with a hemispherical groove matching the slider, the cover passes through the slide The block is supported on the upper surface of the chute, the outline of the left half of the chute is rectangular, the outline of the right half of the chute is semicircular, the left half of the chute is processed with a cylindrical groove, the right half of the chute The half part is processed with a spherical groove, and the arc surface radius of the cylindrical groove is set to be the same as that of the spherical groove, and the cylindrical groove and the spherical groove are smoothly transitioned to form a complete sliding surface; the upper end surface of the chute At least two concentric circles are divided sequentially from the center to the outside, and the coefficient of friction at the concentric circles increases sequentially from the inside to the outside. The invention is used for vibration isolation of large-span space structures.

Description

technical field [0001] The invention relates to a friction bearing, in particular to a variable friction spherical-cylindrical friction bearing used for vibration isolation and shock absorption of building structures. Background technique [0002] At present, the shock-absorbing and shock-isolation bearings used on large-span structures such as bridges and space grids mainly include lead rubber bearings, high-damping rubber bearings, and sliding friction bearings. These bearings have high damping and low stiffness. , large deformation, corrosion resistance and other advantages. In 1985, Zayas, a scholar at the University of California, USA, proposed an efficient and completely passive dry friction slip isolation device, the Friction Pendulum Bearing (FPB). This kind of bearing has many characteristics of plane sliding isolation bearings, such as low sensitivity to earthquake excitation and high stability, and the friction pendulum bearing can use its unique spherical groove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/36E04B1/98E01D19/04
Inventor 范峰孔德文支旭东孙梦涵
Owner HARBIN INST OF TECH
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