Three-dimensional composite friction pendulum vibration isolator based on nonlinear energy trap

A nonlinear energy well and three-dimensional composite technology, applied in the field of three-dimensional composite friction pendulum shock isolators, can solve the problems of maintenance, excessive displacement of the shock-isolation layer, and attenuation of seismic energy, so as to ensure safety, consume seismic energy, and prolong self- The effect of vibration period

Inactive Publication Date: 2013-09-18
NORTHEAST FORESTRY UNIVERSITY +1
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Problems solved by technology

A three-dimensional composite friction pendulum isolator based on a nonlinear energy well is proposed. The non-linear energy well, one of the frontier hotspots in the field of international vibration control in recent years, is applied to the improvement of the friction pendulum isolator. Novel features such as high-efficiency vibration absorption rate, wide vibration absorption frequency b

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  • Three-dimensional composite friction pendulum vibration isolator based on nonlinear energy trap

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Example Embodiment

[0020] Example 1:

[0021] The three-dimensional composite friction pendulum isolator based on the nonlinear energy trap is composed of: the device body is composed of a metal cylindrical sliding sleeve 6 , a combined disc spring 4 and a polytetrafluoroethylene sliding joint 5 . The metal cylindrical sliding sleeve 6 is in contact with the lower platform plate 1, the combined disc spring 4 is placed in the metal cylindrical sliding sleeve 6, and the combined disc spring 4 is placed with PTFE The vinyl sliding joint 5, the PTFE sliding joint 5 is in contact with the upper deck plate 7 through the Teflon coating 8; the upper deck plate 7 is connected with the upper deck beam 10 through the upper pre-embedded steel bar 9; non-linear The energy trap 3 is connected with the metal cylindrical sliding sleeve 6 through the stiffness spring 4; the nonlinear energy trap 3 is in contact with the lower platform plate 1 through the roller 13; the lower plate 1 and the upper plate 7 are in ...

Example Embodiment

[0022] Example 2:

[0023] In the above-mentioned three-dimensional composite friction pendulum isolator based on nonlinear energy wells, the lower surface of the upper deck 7 is a smooth spherical surface, and the upper deck 7 is connected to the upper deck beam 10 through the upper pre-embedded steel bars 9, The lower deck board 1 is connected with the lower deck beam 11 through the lower pre-embedded steel bars 12 . When the top surface of the device body (metal cylindrical sliding sleeve 6, combined disc spring 4, polytetrafluoroethylene sliding joint 5) slides relative to the spherical surface of the upper support plate 7, the gravity of the upper structure will give the top cap Provide a restoring force to return to the original equilibrium position. The radius of the convex spherical surface 6 of the PTFE sliding joint 5 is consistent with the smooth spherical surface of the upper deck 7, but the chord length of the convex spherical surface should be controlled within t...

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Abstract

The invention discloses a three-dimensional composite friction pendulum vibration isolator based on a nonlinear energy trap. Structural vibration frequency is staggered away from seismic oscillation dominant frequency and a large amount of seismic oscillation input energy is absorbed by using the characteristics of attenuation and absorption of vibration energy, absorption of vibration frequency bandwidth and the like existing in the nonlinear energy trap as well as a vertical vibration isolation disk-shaped spring, so that the multi-dimensional seismic response of a structure is reduced, and seismic hazards of building structures are prevented. The three-dimensional composite friction pendulum vibration isolator comprises a metal sliding sleeve, a disk-shaped spring, a polytetrafluoroethylene sliding joint, a nonlinear energy trap and pile caps, wherein the disk-shaped spring is arranged in the metal sliding sleeve; the polytetrafluoroethylene sliding joint is arranged on the disk-shaped spring; the polytetrafluoroethylene sliding joint is in relative sliding contact with an upper pile cap through a polytetrafluoroethylene coating; the side face of the nonlinear energy trap is connected with the disk-shaped spring through a rigid spring; the nonlinear energy trap is in rolling contact with a lower pile cap through a rolling shaft; sliding surfaces of the upper and lower pile caps are spherical surfaces. The three-dimensional composite friction pendulum vibration isolator is used for resisting possible violent earthquakes.

Description

Technical field: [0001] The invention relates to a three-dimensional composite friction pendulum shock isolator based on a nonlinear energy well, belonging to the field of shock isolation and shock absorption control. Background technique: [0002] It can be seen from the obtained seismic records that due to the difference in the mechanism of earthquake occurrence, the distance and the nature of the soil layer, each seismic record has its specific dominant frequency, that is, it has abundant energy at certain frequencies. Ordinary non-seismic-isolated multi-storey buildings have high stiffness and short period, and their basic period is just in the frequency band where the seismic input energy is the largest, so the corresponding acceleration response is much larger than the ground motion. If the frequency of structural motion is made to miss these energy-rich dominant frequencies, the seismic response of the structure can be reduced. Invention content: [0003] The objec...

Claims

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Application Information

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IPC IPC(8): E02D31/08E04B1/98
Inventor 杨海旭王海飙赵强
Owner NORTHEAST FORESTRY UNIVERSITY
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