Casper, Phillips & Associates’ Post

How effective is base isolation? Check out this video of two simple structures, one has a traditional foundation and the other is base isolated. We applied some historical earthquake records to the two structures and you can watch their response side by side. Can you guess which one is base isolated? Displacements are greatly magnified for illustration purposes. Base isolation is an incredible way to limit the energy from an earthquake from entering the structural system. Base isolation is being used on some of the most prominent US buildings and monuments; Pasadena City Hall, San Francisco City Hall, Salt Lake City and County Building and LA City Hall are all mounted on base isolation systems. Base isolation is also used on a smaller scale. It’s not uncommon for isolated raised floor systems to be used to safeguard essential equipment against earthquakes. Base isolation has also been used to protect statues and other works of art at the National Museum of Western Art in Tokyo’s Ueno Park. CP&A has designed base isolation system for both buildings and ship to shore container cranes. #StructuralEngineering #Seismic

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