SEISMIC SAFETY IN ANCIENT STONE DOMES REINFORCED BY AN ORIGINAL METHOD

摘要

The present article discusses an original structure for strengthening ancient stone-built domes, whose seismic resistance is to be enhanced. It consists of a thin reinforced concrete reinforced concrete shell, provided with a support ring and placed above the dome. Connecting members project downwards from the shell and are introduced in the midst of the dome's stone. Resulting reinforcement is achieved by creation of an interconnected stone reinforced concrete structure. Stress concentrations in the connection areas are a specific problem of the interconnected structures. While said structures are subject to static and thermal loads and seismically originated forces, problems relating to the stress - strain state of the stone dome and its dynamic characteristics are considered. The issue of stress concentration in surrounding connecting-member locations is discussed. The problem under study is considered through examples of real conservation cases: the ancient stone dome in the town of Ahaltsihe, in the seismic zone of Georgia; and a dome of the Hagia Sophia structure. The stress-strain states are analyzed using the finite-element method.