Piled raft foundation active seismic mitigation and isolation and post-earthquake repair system and method based on advanced early warning

Abstract

The invention discloses a piled raft foundation active seismic mitigation and isolation and post-earthquake repair system and method based on advanced early warning. The system comprises an early warning information receiving and building damage degree evaluation module and a plurality of groups of active adjusting parts, wherein one group of active adjusting parts are arranged on the interface of the pile top of each pile of a high-rise building piled raft foundation and a raft plate, and the active adjusting parts are used for actively adjusting the seismic mitigation and isolation capability of the upper structure and the piled raft foundation and the differential settlement of buildings according to earthquake information fed back by the early warning information receiving and building damage degree evaluation module. According to the piled raft foundation active seismic mitigation and isolation and post-earthquake repair system based on the advanced early warning, early warning information sent by an earthquake early warning system can be received, a horizontal seismic mitigation and isolation support is actively controlled to effectively resist horizontal loads during an earthquake, and earthquake damage to high-rise buildings is reduced; and additionally, the differential settlement of buildings after an earthquake can be leveled, and the service life of safe use of the buildings in areas with frequent earthquake damage is prolonged.

Description

technical field [0001] The invention belongs to the technical field of foundation engineering, and in particular relates to an active seismic reduction and isolation and post-earthquake repair system for piled raft foundations based on advance warning. Background technique [0002] Since my country is located between the Pacific Ocean and the Eurasian seismic belt, it occupies about 33% of the world's terrestrial destructive earthquake areas. The intensity of earthquake disasters is large and frequent, which seriously endangers the safety of people's lives and property. In a strong earthquake, seismic waves will be transmitted to the upper structure through the piled raft foundation of the building, causing horizontal shear failure of the upper structure, and at the same time causing vertical differential settlement of the piled raft foundation, affecting the normal use of the building after the disaster. At present, earthquake early warning systems have been widely used in ...

AI Technical Summary

Problems solved by technology

Although the traditional seismic isolation design can reduce earthquake damage, it cannot actively adjust the connection stiffness between the piled raft foundation and the superstructure according to different earthquake damage degrees.

The single, fixed, and passive shock-absorbing and isolation technology has unsatisfactory anti-seismic and disaster-reducing effects; on the other hand, earthquakes often cause differential settlement of building pile foundations, which affects the normal use of buildings after disasters. The post-disaster building settlement adjustment function has not been considered in the support

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