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Without even touching it: the story of the Leaning Tower of Pisa
This Webinar is being organised by the Italian group of IABSE and IABSE Task Group 5.1 (Forensic Structural Engineering).

Summary of the Webinar:
The history of the Leaning Tower of Pisa, a monument with an age of 850 years, a settlement of 3 m and an out of plumb of 5 m, is briefly recalled. The intervention of underexcavation carried out in the 1990’s is described; it succeeded in arresting the progress of the inclination of the monument, though fully respecting its integrity.
Several lessons have been learned by this experience.
First, the analysis of the history of the Tower, and particularly its monitoring in the last decades, greatly contributed to a thorough understanding of the mechanism of instability and to the conception of a stabilising intervention.
Secondly, an important role has been played by a truly interdisciplinary approach. This is probably a banal observation since the importance of a shared culture among the different actors of conservation and restoration appears by now widely recognized. In fact, many preach interdisciplinarity but few practice it, probably because it is a not easy matter.
Finally, it is shown that a modicum of good luck won’t do any harm!

Oct 7, 2022 02:00 PM in Zurich

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Speaker: Prof. Carlo Viggiani
Emeritus Professor at the University of Napoli Federico II, Italy
Carlo Viggiani is Emeritus Professor at the University of Napoli Federico II where he had been teaching Foundation Engineering from 1975 to 2009. He is Author or Co-Author of 5 books and 230 technical papers; has been Editor of the Italian Geotechnical Journal; component of the Editorial Board of the Journal of Numerical and Analytical Methods in Geomechanics He has been State of the Art Reporter at the ICSMFE in New Delhi, 1994 (Mitigation of Natural Hazards: Landslides and Subsidence) and at the ICSMGE in Osaka, 2005 (Pile foundations).He has been Chairman of TC19 (later TC301) (Preservation of Monuments and Historic Sites) of the ISSMGE, and participated to the conservation of a number of monuments affected by geotechnical problem, including the Leaning Tower of Pisa. Involved in the design and construction of earth dams, civil and industrial buildings, bridges, tunnels and underground constructions, stabilisation of landslides, amongst other roles.
Moderator: Dr. Fabrizio Palmisano
IABSE, Chair and Vice-Chair of various committees and Editorial Board
Moderator: Prof. Claudia Vitone
Associate Professor of geotechnical engineering at the Technical University of Bari, Italy