Three-dimensional friction pendulum isolation bearing

Abstract

The invention discloses a three-dimensional friction pendulum isolation bearing which comprises a bottom double-slideway plate, an upper-side double-slideway plate, a bearing plate, a middle slider, aplurality of spring sleeves and springs, wherein the upper-side double-slideway plate is arranged above the bottom double-slideway plate; the bearing plate is arranged above the upper-side double-slideway plate; the middle slider is arranged between the bottom double-slideway plate and the upper-side double-slideway plate; a sliding block is arranged on each of the upper surface and the lower surface of the middle slider; the spring sleeves are connected between the upper-side double-slideway plate and the bearing plate; the springs are separately arranged in the corresponding spring sleeves;and the springs are connected with the bearing plate and the upper-side double-slideway plate. The three-dimensional friction pendulum isolation bearing realizes the decoupling of horizontal earthquake and vertical earthquake, and vertical isolation is performed by the springs with good isolation reduction effects. The bearing has necessary isolation capacity, the structure gravity is used as restoring force to enable the bearing to be reset. Position limitation protection is considered, three-way isolation parameters can be amended according to different cultural relics, and the three-dimensional friction pendulum isolation bearing has high practicability. Compared with a traditional friction pendulum, the sliding effect of rolling balls is better, and the isolation effect in the horizontal direction is excellent.

Description

technical field [0001] The invention belongs to the technical field of cultural relic protection and construction technology, and in particular relates to a three-dimensional friction pendulum shock-isolation support. Background technique [0002] my country is located in the middle of the world's two major seismic belts, the Pacific seismic belt and the Eurasian seismic belt, and is an earthquake-prone country. The earthquake severely damaged the cultural relics in the museum collection. Taking the 2008 Wenchuan Earthquake in Sichuan as an example, according to incomplete statistics, 3,169 exhibited cultural relics (including 16 first-class cultural relics) in 216 cultural relic collection units in Sichuan Province alone were damaged. 805 cultural relics of the Red Army and folk cultural relics of the Qiang people were all buried under the ruins, causing immeasurable losses. On April 20, a 7.0-magnitude earthquake struck Lushan County, Ya'an City, Sichuan Province, causin...

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Problems solved by technology

[0003] The currently developed seismic isolation bearings mainly include roller type, roller type, ball type, slider type, friction pendulum type, parallel chain rod type, etc., but there are orthogonal slide rails for roller type and roller shaft type isolation bearings The problem of horizontal decoupling, the problem of reset and limit protection of the ball type vibration isolation device

The current seismic isolation devices for cultural relics only consider the two-dimensional seismic isolation capability. However, more and more seismic records show that the vertical seismic action cannot be ignored. Generally, the vertical seismic action can reach about 2 / 3 of the horizontal earthquake action. In high-intensity areas, vertical earthquakes may reach or exceed 1g, and the ratio of vertical earthquake action to horizontal earthquake action may even reach about 2; and some horizontal two-dimensional isolation devices also have horizontal decoupling, self-resetting and limit protection, etc. question

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