A system and method for active seismic isolation and post-earthquake repair of piled raft foundations based on early warning

Abstract

The invention discloses a system and method for active earthquake reduction and isolation and post-earthquake repair of piled raft foundations based on advanced early warning. The system includes early warning information reception and building damage evaluation modules and active adjustment components. A group is set at the interface between each pile top and the raft slab of the piled raft foundation of a high-rise building, and the active adjustment component actively adjusts the upper structure and the pile according to the earthquake information received by the early warning information and the feedback of the building damage evaluation module. Seismic isolation capacity of raft foundations and differential settlement of buildings. The present invention is an active anti-seismic isolation and post-earthquake repair system based on advanced early warning, which can not only receive the early warning information sent by the earthquake early warning system, but also actively control the horizontal anti-seismic support to effectively resist horizontal loads during earthquakes and reduce the number of high-rise buildings. Earthquake damage to buildings; at the same time, it can balance the differential settlement of buildings after earthquakes, and prolong the safe service life of buildings in areas where earthquake damage occurs frequently.

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

Images