Vol. 13, No. 5, 2018

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Seismic vulnerability of domes: a case study

Concetta Cusano, Claudia Cennamo and Maurizio Angelillo

Vol. 13 (2018), No. 5, 679–689

In this work, a simplified structural analysis of the main dome of San Francesco di Paola in Naples is performed by adopting both analytical and graphical approaches. The analytical process is based on the simplified membrane theory and the graphical methodology on the slicing technique. Both methods are used to determine the safety of the dome design under vertical and horizontal loads. We explore the effects of earthquakes by introducing horizontal forces proportional to the weight. Since the slicing technique does not consider the hoop compressive stresses building up in the upper part of the cap, the geometrical safety factor obtained by combining the analytical with the graphical method for the sole dome is lower than the one obtained with the analytical method. The estimate of the ag factor for the dome-buttress structural system obtained with the graphical method is greater than the level accepted for the seismic area of Naples.

seismic vulnerability, masonry domes
Received: 7 August 2018
Accepted: 20 August 2018
Published: 6 April 2019
Concetta Cusano
Department of Architecture and Industrial Design
University of Campania “Luigi Vanvitelli”
Claudia Cennamo
Department of Architecture and Industrial Design
University of Campania “Luigi Vanvitelli”
Maurizio Angelillo
Dipartimento di Ingegneria Civile
Università degli Studi di Salerno