Variable-rigidity friction pendulum bearing

A friction pendulum bearing and variable stiffness technology, applied in building types, buildings, building components, etc., can solve the problems of large internal force and displacement response of the structure, no consideration of vibration, damage, etc.

Pending Publication Date: 2021-09-10
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing variable-stiffness self-resetting shock-isolators are not designed to take into account the extremely rare earthquakes
In the rare case of earthquakes, the internal force and displacement response of the structure using these devices is too large, and damage is very likely to occur

Method used

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  • Variable-rigidity friction pendulum bearing
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  • Variable-rigidity friction pendulum bearing

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Embodiment Construction

[0019] The purpose of the invention of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

[0020] Such as figure 1 As shown, a variable stiffness friction pendulum support includes an upper steel plate 1, a slider 2, a lower steel plate 3 and an SMA cable 4. The upper steel plate 1 is connected to the lower steel plate 3 through the slider 2, and the edge of the upper steel plate 1 and the lower steel plate The edges of 3 are provided with a plurality of screw holes, the U-shaped hoop 5 is installed on the screw holes, one end of the SMA cable 4 is connected with the upper steel plate 1 through the U-shaped hoop 5, and the other end of the SMA cable 4 is connected with the lower steel plate through the U-shaped hoop 5. Steel plate 3 con...

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Abstract

The invention discloses a variable-rigidity friction pendulum bearing which comprises an upper steel plate, a sliding block, a lower steel plate and an SMA cable. The lower steel plate comprises a first steel plate body and a second steel plate body, the first steel plate body is connected with the second steel plate body, the second steel plate body is provided with a curved surface part, and the curved surface part comprises a small-radius spherical surface part and a gravity well curved surface part; and the small-radius spherical surface part is located in the center of the gravity well curved surface part, the upper end of the sliding block is installed on the upper steel plate, the lower end of the sliding block is installed on the small-radius spherical surface part, and the upper steel plate is connected with the first steel plate body through the SMA cable. According to the variable-rigidity friction pendulum bearing, the bearing is endowed with self-resetting capability and variable rigidity, and extremely rare earthquake oscillation can be resisted.

Description

technical field [0001] The invention relates to the technical field of anti-seismic design in civil engineering, in particular to a variable stiffness friction pendulum support. Background technique [0002] "China's Fifth Generation Earthquake Parameter Zoning Map" GB18306-2015 proposes extremely rare earthquakes and puts forward higher requirements for the seismic performance of structures. In this context, there is an urgent need to develop seismic isolation bearings with strong earthquake resistance and self-recovery after earthquakes. [0003] By setting the polynomial surface, someone once proposed a friction pendulum isolation bearing with a 6th degree polynomial variable surface, which can meet performance targets at different levels. However, they pointed out that this design did not take into account the extremely rare ground motion, which would cause a sharp increase in the acceleration response under strong earthquakes. If the extremely rare ground motion is con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E04H9/02E04B1/36
CPCE04B1/98E04H9/021E04B1/36
Inventor 曹飒飒胡付龙
Owner GUANGZHOU UNIVERSITY
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