This animation shows the different effects produced by an earthquake on the conventional and anti seismic foundation of a building [source, Said Lopez:]
Anti-seismic fondation can use several kinds of dampeners. This is a bi-directional dynamic loading test on steel damper for base isolated buildings simulating the behavior caused by earthquake [source, full video, Tokyo Tech:]
Another kind of anti-seismic foundation is obtained using pendulum bearings that consist of an upper/lower spherical plate with sliding surface applied with special coating and a moving disc [source, full video, magebagroup:]
Straddling pendulum dampers are another base isolation system used in the prevention of earthquakes by changing the "swing" frequency (fundamental frequency) of the building [source, full video, poolygonzoo:]

• • •

Missing some Tweet in this thread? You can try to force a refresh

Keep Current with Massimo

Massimo Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!


Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @Rainmaker1973

14 Sep
Last year, a company named Nectome, "advetised" a service for backing up & (eventually) digitizing people's brains which was going to be 100%-fatal. They retracted saying it wasn't correct they expected to revive a whole consciousness from the connectome
The actual computational requirements for running an uploaded human mind are very difficult to quantify & strongly depend on the chosen level of simulation model scale. In other words, if you want a very precise copy, you need a ginormous processing power
There is, however, a different approach to mind uploading that uses a completely different set of technologies: mind virtualisation, i.e. extracting a number of characteristics from a mind to develop a model that can be used to simulate future behaviour
Read 6 tweets
21 Dec 19
People have speculated over the nature of seemingly useless physical human characteristics for thousands of years. It wasn’t until the late 18th and early 19th centuries, though, that the idea of vestigiality would enter the public imagination
Examples of human vestigiality are numerous, including the anatomical, the behavioral, and molecular. Among behavioral, goosebumps are caused by your arrector pili, the smooth muscle fibers that contract involuntarily when you are stressed, excited or cold
The palmar and plantar grasp reflex is found in infants of humans and most primates. When an object is placed in an infant's hand or close to a foot, the fingers or the toes will close reflexively, as the object is grasped via palmar grasp
Read 8 tweets
10 Apr 19
In few minutes, astronomers across the globe will hold six major press conferences simultaneously to announce the first results of the Event Horizon Telescope (EHT), which was designed precisely for that purpose Watch LIVE:
More about the Event Horizon Telescope, an international collaboration aiming to capture the first image of a black hole by creating a virtual Earth-sized telescope
Read 14 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!

Follow Us on Twitter!