Earthquake metamaterial

Abstract

The invention relates to an earthquake metamaterial, and belongs to the field of earthquake resistance of buildings. The earthquake metamaterial is formed by arranging a plurality of earthquake metamaterial unit cells according to a square lattice period, each earthquake metamaterial unit cell is formed by wrapping a steel block with a rubber block, wherein the material parameters of the rubber block are as follows: 1. the Young modulus Es is 1.6*105 Pa, the Poisson's ratio mu s is 0.39 and the mass density Rho s is 1053 Kg / m<3>, and the material parameters of the steel block are as follows: the Young modulus Est is 210 GPa, the Poisson's ratio mu st is 0.3 and the mass density Rho st is 7850 kg / m<3>. The earthquake metamaterial is formed by combining the rubber block and the steel block which are low in price and easy to obtain, the earthquake metamaterial is buried on the ground around a building, the band gap characteristic of the earthquake metamaterial is utilized, earthquake waves within the band gap frequency range are controlled and weakened before reaching the building, and earthquake prevention and disaster reduction of the building are achieved at a low cost.

Description

technical field [0001] The invention relates to the fields of solid mechanics and building anti-seismic, in particular to an earthquake metamaterial. Background technique [0002] According to the United States Geological Survey, there are millions of earthquakes every year around the world, of which more than 1,000 earthquakes are above magnitude 5.0. Earthquakes cause a large number of casualties and property losses, mainly due to the damage and collapse of buildings caused by earthquakes. Earthquakes threaten the safety of human life. In addition to earthquake prediction and earthquake early warning, the most direct way to reduce earthquake disasters is to construct earthquake-resistant buildings that can withstand strong earthquakes in engineering. [0003] The earliest anti-seismic measures for buildings were mainly anti-seismic design of building structures. The working principle of this design is to use the nonlinear state of a single structure itself to store and di...

AI Technical Summary

Problems solved by technology

However, this method has some disadvantages. For example, the durability of the vibration damping device is generally poor and the service life is short. It should be used with caution in harsh environments such as corrosive environments. In addition, the vibration isolation support is expensive, and the vibration isolation support is laid on a large area. Constrained by cost; and engineeringly strengthening the building to resist earthquakes is limited, and it is powerless to resist sudden high-intensity earthquakes; in addition, it is very difficult to adopt this vibration isolation method for an already built building, such as a historic site. Difficult to achieve

Images