Seismic vulnerability of the masonry historical structures

Ivo Caliò & Giuseppe Occhipinti

A WORLD HERITAGE BUILDING THAT HAS TO BE PRESERVED

CONSIDERATION ON THE SEISMIC VULNERABILITY OF THE SAINT GEORGE CATHEDRAL’S MAIN DOME IN RAGUSA IBLA

Rosario Gagliardi (Siracusa, 1698 – Noto, 1762)

San Giuseppe - Ibla San Giorgio - Ibla San Giorgio - Modica

Courtesy of the Saint George’s Museum – Ragusa Ibla

Original Gagliardi’s drawing of the Saint George Cathedral’s plan 1744– Ragusa Ibla

Courtesy of the Saint George’s Museum – Ragusa Ibla

Original Gagliardi’s drawing of the Saint George Cathedral 1744– Ragusa Ibla

53 years after the great earthquake

Courtesy of the Saint George’s Museum – Ragusa Ibla

Original Gagliardi’s drawing of the Saint George Cathedral 1744– Ragusa Ibla

Courtesy of the Saint George’s Museum – Ragusa Ibla

Original Gagliardi’s drawing of the Saint George Cathedral’s structures 1744– Ragusa Ibla

1775

82 years after the great earthquake

1775

0

1820

Arch. Rosario Gagliardi

1693

+82 years

Arch. Sebastiano Ittar(Catania, 1768 – Catania, 1847)

+127 years

Maestro (master builder) Carmelo Cutraro

Maestro Cutraro took his inspiration from the Pantheon‘s geometry

Saint George in Modica

Courtesy of the Saint George’sMuseum – Ragusa Ibla

Courtesy of the Saint George’s Museum – Ragusa Ibla

Original Gagliardi’s drawing of the Saint George Cathedral’s plan 1744– Ragusa Ibla

Under stati loads Carmelo Arezzo di Trifiletti found out the sz

around of 1,4 Mpa = 14 kg/cm2

at the lower side of the columns