Development of vibration isolation pad at home and abroad

Base isolation is a new building seismic technology developed rapidly in recent years.

Several layers of logs are crisscrossed on the foundation, concrete foundation is made on the logs, and then houses are built on them, which weakens the technology of transmitting seismic energy to buildings. Compared with the traditional anti-seismic measures, it cleverly avoids the significant period of the earthquake and absorbs the seismic energy through the large deformation of the isolation system, as shown in the figure. Through a large number of experimental studies and practical engineering applications, it is found that base isolation technology can generally reduce the seismic response by 80% ~ 90% [1], and on the basis of the same crack design, it can also save 5% ~ 20% of the project cost by reducing civil materials and increasing the number of floors, so it is highly praised by the architectural community and is called a revolution in the history of modern architecture.

1906 Jakob Bechtold of Germany also proposed the use of base isolation technology to ensure the safety of buildings. 1909, British doctor Calante Lentz J? It is planned to lay 1 layer of talcum powder or mica between the foundation and superstructure A. During the earthquake, the building will slide horizontally under the shear force to achieve the purpose of building isolation. These isolation schemes have not yet appeared in earthquake engineering.