Engineers solve 500-year-old mystery of Leaning Tower of Pisa

Leaning Tower of Suurhusen

Leaning Tower of Suurhusen

The Leaning Tower of Pisa has always been a baffling mystery for scientists.

Many earthquakes have vandalized the Pisa region in years by the time building of the tower commenced in 1173.

Even though the 58-metre tall tower leans at a five-degree angle, it has survived four earthquakes since 1280 with not one scratch on it.

The Leaning Tower of Pisa stands in the Piazza dei Miracoli and was created as a bell tower.

Scientists until now had a puzzle that how this Leaning Tower of Pisa survived the strong earthquakes. It took 200 years for the construction of this tower.

It's a long-standing question many have attempted to explain but a team of global scientists believe they may have an answer.

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After studying available seismological, geotechnical and structural information, the research team concluded that the survival of the tower can be attributed to a phenomenon known as dynamic soil-structure interaction (DSSI).

The researchers found that a significant height and rigidity of the tower, combined with the softness of the Foundation are changing the vibration of the soil so that the structure ceases to resonate with the motion of the earth during tremors.

This has been the key to its survival.

The unique combination of these characteristics gives the tower the world record in DSSI effects.

"This is the key to understanding its viability", - scientists say."The irony is that the same soil that caused the tilting and instability of the tower and nearly caused its collapse, we can thank for the fact that he helped her to withstand these seismic events", explained Professor George Mylonakis, co-author of the study.

Results from the study have been presented to global workshops and will be formally announced at the 16th European Conference in Earthquake Engineering taking place in Thessaloniki, Greece next month [18 to 21 June 2018].

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