Apart from the modern techniques which are well documented in the codes of practice, there are some other old traditional earthquake resistant techniques which have been proved to be more effective for resisting earthquake loading and are also cost e
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Earthquake ResistantFull description
Earthquakes are very serious problems since they affect human life in various ways. The Earthquakes are mainly prevented by two methods namely Base Isolation Methods and Seismic Dampers. The presen...
Building designFull description
ceiling fan cleanerFull description
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Libro básico para entender el aislamiento sísmicoFull description
Building designDescripción completa
Descripción: Earthquake Resistant Design of Structures by S.K. Duggal
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basic detailsDescripción completa
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Libro básico para entender el aislamiento sísmico
BUILDING EARTHQUAKE RESISTANT STRUCTURES 2
Literature Review
In Hu, Liu and Dong's summary article reviewing the study about early and modern ideas regarding base isolation, it was found that modern base isolation designs is more effective. It is said that rubber bearing is the most popular type of base isolation and is easy to manufacture. It is said this kind of isolation is very good in reducing the high acceleration, or the high frequency motion. The main idea of this system is to make the natural period of the structure very long, say to avoid the resonance of the structure with the strong high frequency components of the ground motion.
Strong motion observation and test results all show that base isolation, when properly designed is reliable and effective, reducing high-frequency motion to a half or one-fifth (Hisano, Nagashino, and Kawamura, 1990). The first base – isolated building in the United States was the Foothill Communities Justice Center in San Bernardino Country, completed in 1985. After completion, the record obtained during an earthquake of M=4.9, 30 km away, showed the satisfactory result of base isolation design.
Base isolation has also been used in other countries in the past two decades. The French nuclear construction company Framatome (EDF) used a standard nuclear power plant design for 0.2 g acceleration with a base isolation system for a site with higher acceleration. The isolators are made of laminated natural rubber bearings with a cylindrical plug of lead in the central hole of each bearing to increase damping and control the displacement of the system.
