Canditone, Ciro (2025) Multi-hazard collapse analysis of masonry structures via the Applied Element Method. [Tesi di dottorato]

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Abstract

URM buildings constitute a significant share of the Italian residential building stock and cultural heritage. Due to their old age, however, most URM buildings are non-engineered towards both ordinary (gravity) and exceptional (e.g. earthquake ground motion, soil settlements) loading conditions, as they often pre-date design codes. A realistic and accurate modelling of URM mechanical and structural response, its relationship with masonry bond patterns, material degradation phenomena and pre-existing damage may be hard to account for through standard analysis and assessment tools such as macro-element formulations or FEM. To this aim, the present PhD thesis deals with the numerical simulation of the response of URM structures by means of a rigid block-based discontinuous numerical technique, the Applied Element Method (AEM). Numerical models are benchmarked against literature experimental data and results by other numerical methods, with a focus on other discontinuous methods. A rigid body and zero-thickness contact interface discretization is adopted, enabling accurate modelling of masonry bond patterns and incorporating its effects in damage onset and progression, as well as the development of complex failure mechanisms and progressive collapse scenarios.

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